Module:Citation/CS1

local z = { error_categories = {};		-- for categorizing citations that contain errors error_ids = {}; message_tail = {}; maintenance_cats = {};		-- for categorizing citations that aren't erroneous per se, but could use a little work properties_cats = {};		-- for categorizing citations based on certain properties, language of source for instance }

----< F O R W A R D  D E C L A R A T I O N S >-- local dates, year_date_check	-- functions in Module:Citation/CS1/Date_validation

local cfg = {};					-- table of configuration tables that are defined in Module:Citation/CS1/Configuration local whitelist = {};			-- table of tables listing valid template parameter names; defined in Module:Citation/CS1/Whitelist

--[[--< I S _ S E T >--

Returns true if argument is set; false otherwise. Argument is 'set' when it exists (not nil) or when it is not an empty string. This function is global because it is called from both this module and from Date validation

]] function is_set( var ) return not (var == nil or var == ''); end

--[[--< F I R S T _ S E T >

Locates and returns the first set value in a table of values where the order established in the table, left-to-right (or top-to-bottom), is the order in which the values are evaluated. Returns nil if none are set.

This version replaces the original 'for _, val in pairs do' and a similar version that used ipairs. With the pairs version the order of evaluation could not be guaranteed. With the ipairs version, a nil value would terminate the for-loop before it reached the actual end of the list.

]]

local function first_set (list, count) local i = 1; while i <= count do															-- loop through all items in list if is_set( list[i] ) then return list[i];														-- return the first set list member end i = i + 1;																-- point to next end end

--[[--< I N _ A R R A Y >--

Whether needle is in haystack

]]

local function in_array( needle, haystack ) if needle == nil then return false; end for n,v in ipairs( haystack ) do		if v == needle then return n;		end end return false; end

--[[--< S U B S T I T U T E >--

Populates numbered arguments in a message string using an argument table.

]]

local function substitute( msg, args ) return args and mw.message.newRawMessage( msg, args ):plain or msg; end

--[[--< E R R O R _ C O M M E N T >

Wraps error messages with css markup according to the state of hidden.

]] local function error_comment( content, hidden ) return substitute( hidden and cfg.presentation['hidden-error'] or cfg.presentation['visible-error'], content ); end

--[[--< S E T _ E R R O R >--

Sets an error condition and returns the appropriate error message. The actual placement of the error message in the output is the responsibility of the calling function.

]] local function set_error( error_id, arguments, raw, prefix, suffix ) local error_state = cfg.error_conditions[ error_id ]; prefix = prefix or ""; suffix = suffix or ""; if error_state == nil then error( cfg.messages['undefined_error'] ); elseif is_set( error_state.category ) then table.insert( z.error_categories, error_state.category ); end local message = substitute( error_state.message, arguments ); message = message .. " (" ..		cfg.messages['help page label'] .. ")"; z.error_ids[ error_id ] = true; if in_array( error_id, { 'bare_url_missing_title', 'trans_missing_title' } ) and z.error_ids['citation_missing_title'] then return '', false; end message = table.concat({ prefix, message, suffix }); if raw == true then return message, error_state.hidden; end return error_comment( message, error_state.hidden ); end

--[[--< A D D _ M A I N T _ C A T >--

Adds a category to z.maintenance_cats using names from the configuration file with additional text if any. To prevent duplication, the added_maint_cats table lists the categories by key that have been added to z.maintenance_cats.

]]

local added_maint_cats = {}														-- list of maintenance categories that have been added to z.maintenance_cats local function add_maint_cat (key, arguments) if not added_maint_cats [key] then added_maint_cats [key] = true;											-- note that we've added this category table.insert( z.maintenance_cats, substitute (cfg.maint_cats [key], arguments));	-- make name then add to table end end

--[[--< A D D _ P R O P _ C A T >

Adds a category to z.properties_cats using names from the configuration file with additional text if any.

]]

local added_prop_cats = {}														-- list of property categories that have been added to z.properties_cats local function add_prop_cat (key, arguments) if not added_prop_cats [key] then added_prop_cats [key] = true;											-- note that we've added this category table.insert( z.properties_cats, substitute (cfg.prop_cats [key], arguments));		-- make name then add to table end end

--[[--< A D D _ V A N C _ E R R O R >

Adds a single Vancouver system error message to the template's output regardless of how many error actually exist. To prevent duplication, added_vanc_errs is nil until an error message is emitted.

]]

local added_vanc_errs;															-- flag so we only emit one Vancouver error / category local function add_vanc_error if not added_vanc_errs then added_vanc_errs = true;													-- note that we've added this category table.insert( z.message_tail, { set_error( 'vancouver', {}, true ) } ); end end

--[[--< I S _ S C H E M E >

does this thing that purports to be a uri scheme seem to be a valid scheme? The scheme is checked to see if it is in agreement with http://tools.ietf.org/html/std66#section-3.1 which says: Scheme names consist of a sequence of characters beginning with a  letter and followed by any combination of letters, digits, plus ("+"), period ("."), or hyphen ("-").

returns true if it does, else false

]]

local function is_scheme (scheme) return scheme and scheme:match ('^%a[%a%d%+%.%-]*:');						-- true if scheme is set and matches the pattern end

--[=[-< I S _ D O M A I N _ N A M E >--

Does this thing that purports to be a domain name seem to be a valid domain name?

Syntax defined here: http://tools.ietf.org/html/rfc1034#section-3.5 BNF defined here: https://tools.ietf.org/html/rfc4234 Single character names are generally reserved; see https://tools.ietf.org/html/draft-ietf-dnsind-iana-dns-01#page-15; see also Single-letter second-level domain list of tlds: https://www.iana.org/domains/root/db

rfc952 (modified by rfc 1123) requires the first and last character of a hostname to be a letter or a digit. Between the first and last characters the name may use letters, digits, and the hyphen.

Also allowed are IPv4 addresses. IPv6 not supported

domain is expected to be stripped of any path so that the last character in the last character of the tld. tld is two or more alpha characters. Any preceding '//' (from splitting a url with a scheme) will be stripped here. Perhaps not necessary but retained incase it is necessary for IPv4 dot decimal.

There are several tests: the first character of the whole domain name including subdomains must be a letter or a digit single-letter/digit second-level domains in the .org TLD q, x, and z SL domains in the .com TLD i and q SL domains in the .net TLD single-letter SL domains in the ccTLDs (where the ccTLD is two letters) two-character SL domains in gTLDs (where the gTLD is two or more letters) three-plus-character SL domains in gTLDs (where the gTLD is two or more letters) IPv4 dot-decimal address format; TLD not allowed

returns true if domain appears to be a proper name and tld or IPv4 address, else false

]=]

local function is_domain_name (domain) if not domain then return false;															-- if not set, abandon end domain = domain:gsub ('^//', '');											-- strip '//' from domain name if present; done here so we only have to do it once if not domain:match ('^[%a%d]') then										-- first character must be letter or digit return false; end if domain:match ('%f[%a%d][%a%d]%.org$') then								-- one character .org hostname return true; elseif domain:match ('%f[%a][qxz]%.com$') then								-- assigned one character .com hostname (x.com times out 2015-12-10) return true; elseif domain:match ('%f[%a][iq]%.net$') then								-- assigned one character .net hostname (q.net registered but not active 2015-12-10) return true; elseif domain:match ('%f[%a%d][%a%d]%.%a%a$') then							-- one character hostname and cctld (2 chars) return true; elseif domain:match ('%f[%a%d][%a%d][%a%d]%.%a%a+$') then					-- two character hostname and tld return true; elseif domain:match ('%f[%a%d][%a%d][%a%d%-]+[%a%d]%.%a%a+$') then			-- three or more character hostname.hostname or hostname.tld return true; elseif domain:match ('^%d%d?%d?%.%d%d?%d?%.%d%d?%d?%.%d%d?%d?') then		-- IPv4 address return true; else return false; end end

--[[--< I S _ U R L >--

returns true if the scheme and domain parts of a url appear to be a valid url; else false.

This function is the last step in the validation process. This function is separate because there are cases that are not covered by split_url, for example is_parameter_ext_wikilink which is looking for bracketted external wikilinks.

]]

local function is_url (scheme, domain) if is_set (scheme) then														-- if scheme is set check it and domain return is_scheme (scheme) and is_domain_name (domain); else return is_domain_name (domain);											-- scheme not set when url is protocol relative end end

--[[--< S P L I T _ U R L >

Split a url into a scheme, authority indicator, and domain. If protocol relative url, return nil scheme and domain else return nil for both scheme and domain.

When not protocol relative, get scheme, authority indicator, and domain. If there is an authority indicator (one or more '/' characters following the scheme's colon), make sure that there are only 2.

]]

local function split_url (url_str) local scheme, authority, domain; url_str = url_str:gsub ('(%a)/.*', '%1');									-- strip path information (the capture prevents false replacement of '//')

if url_str:match ('^//%S*') then											-- if there is what appears to be a protocol relative url domain = url_str:match ('^//(%S*)') elseif url_str:match ('%S-:/*%S+') then										-- if there is what appears to be a scheme, optional authority indicator, and domain name scheme, authority, domain = url_str:match ('(%S-:)(/*)(%S+)');			-- extract the scheme, authority indicator, and domain portions authority = authority:gsub ('//', '', 1);								-- replace place 1 pair of '/' with nothing; if is_set(authority) then												-- if anything left (1 or 3+ '/' where authority should be) then domain = nil;														-- set to nil which will cause an error message end end return scheme, domain; end

--[[--< L I N K _ P A R A M _ O K >---

checks the content of |title-link=, |series-link=, |author-link= etc for properly formatted content: no wikilinks, no urls

Link parameters are to hold the title of a wikipedia article so none of the WP:TITLESPECIALCHARACTERS are allowed: # < > [ ] | { } _ except the underscore which is used as a space in wiki urls and # which is used for section links

returns false when the value contains any of these characters.

When there are no illegal characters, this function returns TRUE if value DOES NOT appear to be a valid url (the
 * -link= parameter is ok); else false when value appears to be a valid url (the | -link= parameter is NOT ok).

]]

local function link_param_ok (value) local scheme, domain; if value:find ('[<>%[%]|{}]') then											-- if any prohibited characters return false; end

scheme, domain = split_url (value);											-- get scheme or nil and domain or nil from url; return not is_url (scheme, domain);											-- return true if value DOES NOT appear to be a valid url end

--[[--< C H E C K _ U R L >

Determines whether a URL string appears to be valid.

First we test for space characters. If any are found, return false. Then split the url into scheme and domain portions, or for protocol relative (//example.com) urls, just the domain. Use is_url to validate the two portions of the url. If both are valid, or for protocol relative if domain is valid, return true, else false.

]]

local function check_url( url_str ) if nil == url_str:match ("^%S+$") then										-- if there are any spaces in |url=value it can't be a proper url return false; end local scheme, domain;

scheme, domain = split_url (url_str);										-- get scheme or nil and domain or nil from url; return is_url (scheme, domain);												-- return true if value appears to be a valid url end

--[=[-< I S _ P A R A M E T E R _ E X T _ W I K I L I N K >

Return true if a parameter value has a string that begins and ends with square brackets [ and ] and the first non-space characters following the opening bracket appear to be a url. The test will also find external wikilinks that use protocol relative urls. Also finds bare urls.

The frontier pattern prevents a match on interwiki links which are similar to scheme:path urls. The tests that find bracketed urls are required because the parameters that call this test (currently |title=, |chapter=, |work=, and |publisher=) may have wikilinks and there are articles or redirects like '//Hus' so, while uncommon, |title=//Hus is possible as might be //Hus.

]=]

local function is_parameter_ext_wikilink (value) local scheme, domain;

value = value:gsub ('([^%s/])/%a.*', '%1');									-- strip path information (the capture prevents false replacement of '//')

if value:match ('%f[%[]%[%a%S*:%S+.*%]') then								-- if ext wikilink with scheme and domain: [xxxx://yyyyy.zzz] scheme, domain = value:match ('%f[%[]%[(%a%S*:)(%S+).*%]') elseif value:match ('%f[%[]%[//%S*%.%S+.*%]') then							-- if protocol relative ext wikilink: [//yyyyy.zzz] domain = value:match ('%f[%[]%[//(%S*%.%S+).*%]'); elseif value:match ('%a%S*:%S+') then										-- if bare url with scheme; may have leading or trailing plain text scheme, domain = value:match ('(%a%S*:)(%S+)'); elseif value:match ('//%S*%.%S+') then										-- if protocol relative bare url: //yyyyy.zzz; may have leading or trailing plain text domain = value:match ('//(%S*%.%S+)');									-- what is left should be the domain else return false;															-- didn't find anything that is obviously a url end

return is_url (scheme, domain);												-- return true if value appears to be a valid url end

--[[-< C H E C K _ F O R _ U R L >-

loop through a list of parameters and their values. Look at the value and if it has an external link, emit an error message.

]]

local function check_for_url (parameter_list) local error_message = ''; for k, v in pairs (parameter_list) do										-- for each parameter in the list if is_parameter_ext_wikilink (v) then									-- look at the value; if there is a url add an error message if is_set(error_message) then										-- once we've added the first portion of the error message ... error_message=error_message .. ", ";							-- ... add a comma space separator end error_message=error_message .. "&#124;" .. k .. "=";				-- add the failed parameter end end if is_set (error_message) then												-- done looping, if there is an error message, display it		table.insert( z.message_tail, { set_error( 'param_has_ext_link', {error_message}, true ) } ); end end

--[[--< S A F E _ F O R _ I T A L I C S >--

Protects a string that will be wrapped in wiki italic markup '' ... ''

Note: We cannot use  for italics, as the expected behavior for italics specified by ... in the title is that they will be inverted (i.e. unitalicized) in the resulting references. In addition,  and '' tend to interact poorly under Mediawiki's HTML tidy.

]]

local function safe_for_italics( str ) if not is_set(str) then return str; else if str:sub(1,1) == "'" then str = " " .. str; end if str:sub(-1,-1) == "'" then str = str .. " "; end -- Remove newlines as they break italics. return str:gsub( '\n', ' ' ); end end

--[[--< S A F E _ F O R _ U R L >--

Escape sequences for content that will be used for URL descriptions

]]

local function safe_for_url( str ) if str:match( "%[%[.-%]%]" ) ~= nil then table.insert( z.message_tail, { set_error( 'wikilink_in_url', {}, true ) } ); end return str:gsub( '[%[%]\n]', {			['['] = '&#91;',		[']'] = '&#93;',		['\n'] = ' ' } ); end

--[[--< W R A P _ S T Y L E >--

Applies styling to various parameters. Supplied string is wrapped using a message_list configuration taking one argument; protects italic styled parameters. Additional text taken from citation_config.presentation - the reason this function is similar to but separate from wrap_msg.

]]

local function wrap_style (key, str) if not is_set( str ) then return ""; elseif in_array( key, { 'italic-title', 'trans-italic-title' } ) then str = safe_for_italics( str ); end

return substitute( cfg.presentation[key], {str} ); end

--[[--< E X T E R N A L _ L I N K >

Format an external link with error checking

]]

local function external_link( URL, label, source ) local error_str = ""; if not is_set( label ) then label = URL; if is_set( source ) then error_str = set_error( 'bare_url_missing_title', { wrap_style ('parameter', source) }, false, " " ); else error( cfg.messages["bare_url_no_origin"] ); end end if not check_url( URL ) then error_str = set_error( 'bad_url', {wrap_style ('parameter', source)}, false, " " ) .. error_str; end return table.concat({ "[", URL, " ", safe_for_url( label ), "]", error_str }); end

--[[--< E X T E R N A L _ L I N K _ I D >--

Formats a wiki style external link

]]

local function external_link_id(options) local url_string = options.id; if options.encode == true or options.encode == nil then url_string = mw.uri.encode( url_string ); end return mw.ustring.format( '%s%s[%s%s%s %s]',		options.link, options.label, options.separator or " ",		options.prefix, url_string, options.suffix or "",		mw.text.nowiki(options.id)	); end

--[[--< D E P R E C A T E D _ P A R A M E T E R >--

Categorize and emit an error message when the citation contains one or more deprecated parameters. The function includes the offending parameter name to the error message. Only one error message is emitted regardless of the number of deprecated parameters in the citation.

]]

local page_in_deprecated_cat;													-- sticky flag so that the category is added only once local function deprecated_parameter(name) if not page_in_deprecated_cat then page_in_deprecated_cat = true;											-- note that we've added this category table.insert( z.message_tail, { set_error( 'deprecated_params', {name}, true ) } );		-- add error message end end

--[[--< K E R N _ Q U O T E S >

Apply kerning to open the space between the quote mark provided by the Module and a leading or trailing quote mark contained in a |title= or |chapter= parameter's value. This function will positive kern either single or double quotes: "'Unkerned title with leading and trailing single quote marks'" " 'Kerned title with leading and trailing single quote marks' " (in real life the kerning isn't as wide as this example) Double single quotes (italic or bold wikimarkup) are not kerned.

Call this function for chapter titles, for website titles, etc; not for book titles.

]]

local function kern_quotes (str) local cap=''; local cap2=''; cap, cap2 = str:match ("^([\"\'])([^\'].+)");								-- match leading double or single quote but not double single quotes	if is_set (cap) then		str = substitute (cfg.presentation['kern-left'], {cap, cap2});	end

cap, cap2 = str:match ("^(.+[^\'])([\"\'])$")	if is_set (cap) then		str = substitute (cfg.presentation['kern-right'], {cap, cap2});	end	return str; end

--[[--< F O R M A T _ S C R I P T _ V A L U E >

not be italicized and may be written right-to-left. The value supplied by |script-title= is concatenated onto Title after Title has been wrapped in italic markup.
 * script-title= holds title parameters that are not written in Latin based scripts: Chinese, Japanese, Arabic, Hebrew, etc. These scripts should

Regardless of language, all values provided by |script-title= are wrapped in ... tags to isolate rtl languages from the English left to right.

|script-title=ja:*** *** (where * represents a Japanese character) Spaces between the two-character code and the colon and the colon and the first script character are allowed: |script-title=ja : *** *** |script-title=ja: *** *** |script-title=ja :*** *** Spaces preceding the prefix are allowed: |script-title = ja:*** ***
 * script-title= provides a unique feature. The value in |script-title= may be prefixed with a two-character ISO639-1 language code and a colon:

The prefix is checked for validity. If it is a valid ISO639-1 language code, the lang attribute (lang="ja") is added to the tag so that browsers can know the language the tag contains. This may help the browser render the script more correctly. If the prefix is invalid, the lang attribute is not added. At this time there is no error message for this condition.

Supports |script-title= and |script-chapter=

TODO: error messages when prefix is invalid ISO639-1 code; when script_value has prefix but no script; ]]

local function format_script_value (script_value) local lang='';																-- initialize to empty string local name; if script_value:match('^%l%l%s*:') then										-- if first 3 non-space characters are script language prefix lang = script_value:match('^(%l%l)%s*:%s*%S.*');						-- get the language prefix or nil if there is no script if not is_set (lang) then return '';															-- script_value was just the prefix so return empty string end -- if we get this far we have prefix and script name = mw.language.fetchLanguageName( lang, "en" );						-- get language name so that we can use it to categorize if is_set (name) then													-- is prefix a proper ISO 639-1 language code? script_value = script_value:gsub ('^%l%l%s*:%s*', '');				-- strip prefix from script -- is prefix one of these language codes? if in_array (lang, {'ar', 'bg', 'bs', 'dv', 'el', 'fa', 'he', 'hy', 'ja', 'ka', 'ko', 'ku', 'mk', 'ps', 'ru', 'sd', 'sr', 'th', 'uk', 'ug', 'yi', 'zh'}) then add_prop_cat ('script_with_name', {name, lang}) else add_prop_cat ('script') end lang = ' lang="' .. lang .. '" ';									-- convert prefix into a lang attribute else lang = '';															-- invalid so set lang to empty string end end script_value = substitute (cfg.presentation['bdi'], {lang, script_value});	-- isolate in case script is rtl

return script_value; end

--[[--< S C R I P T _ C O N C A T E N A T E >--

Initially for |title= and |script-title=, this function concatenates those two parameter values after the script value has been wrapped in tags. ]]

local function script_concatenate (title, script) if is_set (script) then script = format_script_value (script);									-- tags, lang atribute, categorization, etc; returns empty string on error if is_set (script) then title = title .. ' ' .. script;										-- concatenate title and script title end end return title; end

--[[--< W R A P _ M S G >--

Applies additional message text to various parameter values. Supplied string is wrapped using a message_list configuration taking one argument. Supports lower case text for templates. Additional text taken from citation_config.messages - the reason this function is similar to but separate from wrap_style.

]]

local function wrap_msg (key, str, lower) if not is_set( str ) then return ""; end if true == lower then local msg; msg = cfg.messages[key]:lower;										-- set the message to lower case before return substitute( msg, str );										-- including template text else return substitute( cfg.messages[key], str ); end end

--[[-< I S _ A L I A S _ U S E D >-

This function is used by select_one to determine if one of a list of alias parameters is in the argument list provided by the template.

Input: args – pointer to the arguments table from calling template alias – one of the list of possible aliases in the aliases lists from Module:Citation/CS1/Configuration index – for enumerated parameters, identifies which one enumerated – true/false flag used choose how enumerated aliases are examined value – value associated with an alias that has previously been selected; nil if not yet selected selected – the alias that has previously been selected; nil if not yet selected error_list – list of aliases that are duplicates of the alias already selected

Returns: value – value associated with alias we selected or that was previously selected or nil if an alias not yet selected selected – the alias we selected or the alias that was previously selected or nil if an alias not yet selected

]]

local function is_alias_used (args, alias, index, enumerated, value, selected, error_list) if enumerated then															-- is this a test for an enumerated parameters? alias = alias:gsub ('#', index);										-- replace '#' with the value in index else alias = alias:gsub ('#', '');											-- remove '#' if it exists end

if is_set(args[alias]) then													-- alias is in the template's argument list if value ~= nil and selected ~= alias then								-- if we have already selected one of the aliases local skip; for _, v in ipairs(error_list) do									-- spin through the error list to see if we've added this alias if v == alias then skip = true; break;														-- has been added so stop looking end end if not skip then													-- has not been added so				table.insert( error_list, alias );								-- add error alias to the error list end else value = args[alias];												-- not yet selected an alias, so select this one selected = alias; end end return value, selected;														-- return newly selected alias, or previously selected alias end

--[[--< S E L E C T _ O N E >--

Chooses one matching parameter from a list of parameters to consider. The list of parameters to consider is just names. For parameters that may be enumerated, the position of the numerator in the parameter name is identified by the '#' so |author-last1= and |author1-last= are represented as 'author-last#' and 'author#-last'.

Because enumerated parameter | 1= is an alias of | = we must test for both possibilities.

Generates an error if more than one match is present.

]]

local function select_one( args, aliases_list, error_condition, index ) local value = nil;															-- the value assigned to the selected parameter local selected = '';														-- the name of the parameter we have chosen local error_list = {};

if index ~= nil then index = tostring(index); end

for _, alias in ipairs( aliases_list ) do									-- for each alias in the aliases list if alias:match ('#') then												-- if this alias can be enumerated if '1' == index then												-- when index is 1 test for enumerated and non-enumerated aliases value, selected = is_alias_used (args, alias, index, false, value, selected, error_list);	-- first test for non-enumerated alias end value, selected = is_alias_used (args, alias, index, true, value, selected, error_list);		-- test for enumerated alias else value, selected = is_alias_used (args, alias, index, false, value, selected, error_list);		--test for non-enumerated alias end end

if #error_list > 0 and 'none' ~= error_condition then						-- for cases where this code is used outside of extract_names local error_str = ""; for _, k in ipairs( error_list ) do if error_str ~= "" then error_str = error_str .. cfg.messages['parameter-separator'] end error_str = error_str .. wrap_style ('parameter', k); end if #error_list > 1 then error_str = error_str .. cfg.messages['parameter-final-separator']; else error_str = error_str .. cfg.messages['parameter-pair-separator']; end error_str = error_str .. wrap_style ('parameter', selected); table.insert( z.message_tail, { set_error( error_condition, {error_str}, true ) } ); end return value, selected; end

--[[--< F O R M A T _ C H A P T E R _ T I T L E >--

Format the four chapter parameters: |script-chapter=, |chapter=, |trans-chapter=, and |chapter-url= into a single Chapter meta- parameter (chapter_url_source used for error messages).

]]

local function format_chapter_title (scriptchapter, chapter, transchapter, chapterurl, chapter_url_source, no_quotes) local chapter_error = ''; if not is_set (chapter) then chapter = '';															-- to be safe for concatenation else if false == no_quotes then chapter = kern_quotes (chapter);										-- if necessary, separate chapter title's leading and trailing quote marks from Module provided quote marks chapter = wrap_style ('quoted-title', chapter); end end

chapter = script_concatenate (chapter, scriptchapter)						-- tags, lang atribute, categorization, etc; must be done after title is wrapped

if is_set (transchapter) then transchapter = wrap_style ('trans-quoted-title', transchapter); if is_set (chapter) then chapter = chapter .. ' ' .. transchapter; else																	-- here when transchapter without chapter or script-chapter chapter = transchapter;												-- chapter_error = ' ' .. set_error ('trans_missing_title', {'chapter'}); end end

if is_set (chapterurl) then chapter = external_link (chapterurl, chapter, chapter_url_source);		-- adds bare_url_missing_title error if appropriate end

return chapter .. chapter_error; end

--[[--< H A S _ I N V I S I B L E _ C H A R S >

This function searches a parameter's value for nonprintable or invisible characters. The search stops at the first match.

This function will detect the visible replacement character when it is part of the wikisource.

Detects but ignores nowiki and math stripmarkers. Also detects other named stripmarkers (gallery, math, pre, ref) and identifies them with a slightly different error message. See also coins_cleanup.

Detects but ignores the character pattern that results from the transclusion of ' templates.

Output of this function is an error message that identifies the character or the Unicode group, or the stripmarker that was detected along with its position (or, for multi-byte characters, the position of its first byte) in the parameter value.

]]

local function has_invisible_chars (param, v)	local position = '';														-- position of invisible char or starting position of stripmarker local dummy;																-- end of matching string; not used but required to hold end position when a capture is returned local capture;																-- used by stripmarker detection to hold name of the stripmarker local i=1; local stripmarker, apostrophe;

while cfg.invisible_chars[i] do		local char=cfg.invisible_chars[i][1]									-- the character or group name local pattern=cfg.invisible_chars[i][2]									-- the pattern used to find it		position, dummy, capture = mw.ustring.find (v, pattern)					-- see if the parameter value contains characters that match the pattern if position then --			if 'nowiki' == capture or 'math' == capture or ('ref' == capture and 'quote' == param) then 	-- nowiki, math, or quote param and ref stripmarker (not an error condition) if 'nowiki' == capture or 'math' == capture then 					-- nowiki, math stripmarker (not an error condition) stripmarker = true;												-- set a flag elseif true == stripmarker and 'delete' == char then				-- because stripmakers begin and end with the delete char, assume that we've found one end of a stripmarker position = nil;													-- unset elseif 'apostrophe' == char then									-- apostrophe template uses &zwj;, hair space and zero-width space apostrophe = true; elseif true == apostrophe and in_array (char, {'zero width joiner', 'zero width space', 'hair space'}) then position = nil;													-- unset else local err_msg; if capture then err_msg = capture .. ' ' .. char; else err_msg = char .. ' ' .. 'character'; end

table.insert( z.message_tail, { set_error( 'invisible_char', {err_msg, wrap_style ('parameter', param), position}, true ) } );	-- add error message return;															-- and done with this parameter end end i=i+1;																	-- bump our index end end

--[[--< A R G U M E N T _ W R A P P E R >--

Argument wrapper. This function provides support for argument mapping defined in the configuration file so that multiple names can be transparently aliased to single internal variable.

]]

local function argument_wrapper( args ) local origin = {}; return setmetatable({		ORIGIN = function( self, k )			local dummy = self[k]; --force the variable to be loaded.			return origin[k];		end	},	{		__index = function ( tbl, k )			if origin[k] ~= nil then				return nil;			end			local args, list, v = args, cfg.aliases[k];			if type( list ) == 'table' then				v, origin[k] = select_one( args, list, 'redundant_parameters' );				if origin[k] == nil then					origin[k] = ; -- Empty string, not nil				end			elseif list ~= nil then				v, origin[k] = args[list], list;			else				-- maybe let through instead of raising an error?				-- v, origin[k] = args[k], k;				error( cfg.messages['unknown_argument_map'] );			end			-- Empty strings, not nil;			if v == nil then				v = cfg.defaults[k] or ;				origin[k] = '';			end			tbl = rawset( tbl, k, v );			return v;		end,	}); end

--[[--< V A L I D A T E >-- Looks for a parameter's name in the whitelist.

Parameters in the whitelist can have three values: true - active, supported parameters false - deprecated, supported parameters nil - unsupported parameters ]]

local function validate( name ) local name = tostring( name ); local state = whitelist.basic_arguments[ name ]; -- Normal arguments if true == state then return true; end		-- valid actively supported parameter if false == state then deprecated_parameter (name);				-- parameter is deprecated but still supported return true; end -- Arguments with numbers in them name = name:gsub( "%d+", "#" );				-- replace digit(s) with # (last25 becomes last#	state = whitelist.numbered_arguments[ name ];	if true == state then return true; end		-- valid actively supported parameter	if false == state then		deprecated_parameter (name);				-- parameter is deprecated but still supported		return true;	end	return false;								-- Not supported because not found or name is set to nil end

-- Formats a wiki style internal link local function internal_link_id(options) return mw.ustring.format( '%s%s%s',		options.link, options.label, options.separator or " ",		options.prefix, options.id, options.suffix or "",		mw.text.nowiki(options.id)	); end

--[[--< N O W R A P _ D A T E >

When date is YYYY-MM-DD format wrap in nowrap span: YYYY-MM-DD. When date is DD MMMM YYYY or is MMMM DD, YYYY then wrap in nowrap span: DD MMMM YYYY or MMMM DD, YYYY

DOES NOT yet support MMMM YYYY or any of the date ranges.

]]

local function nowrap_date (date) local cap=''; local cap2='';

if date:match("^%d%d%d%d%-%d%d%-%d%d$") then date = substitute (cfg.presentation['nowrap1'], date); elseif date:match("^%a+%s*%d%d?,%s+%d%d%d%d$") or date:match ("^%d%d?%s*%a+%s+%d%d%d%d$") then cap, cap2 = string.match (date, "^(.*)%s+(%d%d%d%d)$"); date = substitute (cfg.presentation['nowrap2'], {cap, cap2}); end return date; end

--[[--< IS _ V A L I D _ I S X N >-

ISBN-10 and ISSN validator code calculates checksum across all isbn/issn digits including the check digit. ISBN-13 is checked in check_isbn. If the number is valid the result will be 0. Before calling this function, issbn/issn must be checked for length and stripped of dashes, spaces and other non-isxn characters.

]]

local function is_valid_isxn (isxn_str, len) local temp = 0; isxn_str = { isxn_str:byte(1, len) };	-- make a table of byte values '0' → 0x30 .. '9' → 0x39, 'X' → 0x58 len = len+1;							-- adjust to be a loop counter for i, v in ipairs( isxn_str ) do		-- loop through all of the bytes and calculate the checksum if v == string.byte( "X" ) then		-- if checkdigit is X (compares the byte value of 'X' which is 0x58) temp = temp + 10*( len - i );	-- it represents 10 decimal else temp = temp + tonumber( string.char(v) )*(len-i); end end return temp % 11 == 0;					-- returns true if calculation result is zero end

--[[--< IS _ V A L I D _ I S X N _ 1 3 >--

ISBN-13 and ISMN validator code calculates checksum across all 13 isbn/ismn digits including the check digit. If the number is valid, the result will be 0. Before calling this function, isbn-13/ismn must be checked for length and stripped of dashes, spaces and other non-isxn-13 characters.

]]

local function is_valid_isxn_13 (isxn_str) local temp=0; isxn_str = { isxn_str:byte(1, 13) };										-- make a table of byte values '0' → 0x30 .. '9' → 0x39 for i, v in ipairs( isxn_str ) do		temp = temp + (3 - 2*(i % 2)) * tonumber( string.char(v) );				-- multiply odd index digits by 1, even index digits by 3 and sum; includes check digit end return temp % 10 == 0;														-- sum modulo 10 is zero when isbn-13/ismn is correct end

--[[--< C H E C K _ I S B N >

Determines whether an ISBN string is valid

]]

local function check_isbn( isbn_str ) if nil ~= isbn_str:match("[^%s-0-9X]") then return false; end		-- fail if isbn_str contains anything but digits, hyphens, or the uppercase X	isbn_str = isbn_str:gsub( "-", "" ):gsub( " ", "" );	-- remove hyphens and spaces local len = isbn_str:len; if len ~= 10 and len ~= 13 then return false; end

if len == 10 then if isbn_str:match( "^%d*X?$" ) == nil then return false; end return is_valid_isxn(isbn_str, 10); else local temp = 0; if isbn_str:match( "^97[89]%d*$" ) == nil then return false; end		-- isbn13 begins with 978 or 979; ismn begins with 979 return is_valid_isxn_13 (isbn_str); end end

--[[--< C H E C K _ I S M N >

Determines whether an ISMN string is valid. Similar to isbn-13, ismn is 13 digits begining 979-0-... and uses the same check digit calculations. See http://www.ismn-international.org/download/Web_ISMN_Users_Manual_2008-6.pdf section 2, pages 9–12.

]]

local function ismn (id) local handler = cfg.id_handlers['ISMN']; local text; local valid_ismn = true;

id=id:gsub( "[%s-–]", "" );													-- strip spaces, hyphens, and endashes from the ismn

if 13 ~= id:len or id:match( "^9790%d*$" ) == nil then					-- ismn must be 13 digits and begin 9790 valid_ismn = false; else valid_ismn=is_valid_isxn_13 (id);										-- validate ismn end

--	text = internal_link_id({link = handler.link, label = handler.label,		-- use this (or external version) when there is some place to link to --		prefix=handler.prefix,id=id,separator=handler.separator, encode=handler.encode}) text="" .. handler.label .. "" .. handler.separator .. id;		-- because no place to link to yet

if false == valid_ismn then text = text .. ' ' .. set_error( 'bad_ismn' )							-- add an error message if the issn is invalid end return text; end

--[[--< I S S N >--

Validate and format an issn. This code fixes the case where an editor has included an ISSN in the citation but has separated the two groups of four digits with a space. When that condition occurred, the resulting link looked like this:

|issn=0819 4327 gives: 4327 0819 4327 -- can't have spaces in an external link This code now prevents that by inserting a hyphen at the issn midpoint. It also validates the issn for length and makes sure that the checkdigit agrees with the calculated value. Incorrect length (8 digits), characters other than 0-9 and X, or checkdigit / calculated value mismatch will all cause a check issn error message. The issn is always displayed with a hyphen, even if the issn was given as a single group of 8 digits.

]]

local function issn(id) local issn_copy = id;		-- save a copy of unadulterated issn; use this version for display if issn does not validate local handler = cfg.id_handlers['ISSN']; local text; local valid_issn = true;

id=id:gsub( "[%s-–]", "" );									-- strip spaces, hyphens, and endashes from the issn

if 8 ~= id:len or nil == id:match( "^%d*X?$" ) then		-- validate the issn: 8 digits long, containing only 0-9 or X in the last position valid_issn=false;										-- wrong length or improper character else valid_issn=is_valid_isxn(id, 8);						-- validate issn end

if true == valid_issn then id = string.sub( id, 1, 4 ) .. "-" .. string.sub( id, 5 );	-- if valid, display correctly formatted version else id = issn_copy;											-- if not valid, use the show the invalid issn with error message end text = external_link_id({link = handler.link, label = handler.label,		prefix=handler.prefix,id=id,separator=handler.separator, encode=handler.encode}) if false == valid_issn then text = text .. ' ' .. set_error( 'bad_issn' )			-- add an error message if the issn is invalid end return text end

--[[--< A M A Z O N >--

Formats a link to Amazon. Do simple error checking: asin must be mix of 10 numeric or uppercase alpha characters. If a mix, first character must be uppercase alpha; if all numeric, asins must be 10-digit isbn. If 10-digit isbn, add a maintenance category so a bot or awb script can replace |asin= with |isbn=. Error message if not 10 characters, if not isbn10, if mixed and first character is a digit.

]]

local function amazon(id, domain) local err_cat = ""

if not id:match("^[%d%u][%d%u][%d%u][%d%u][%d%u][%d%u][%d%u][%d%u][%d%u][%d%u]$") then err_cat = ' ' .. set_error ('bad_asin');								-- asin is not a mix of 10 uppercase alpha and numeric characters else if id:match("^%d%d%d%d%d%d%d%d%d[%dX]$") then								-- if 10-digit numeric (or 9 digits with terminal X)			if check_isbn( id ) then												-- see if asin value is isbn10 add_maint_cat ('ASIN'); elseif not is_set (err_cat) then err_cat = ' ' .. set_error ('bad_asin');						-- asin is not isbn10 end elseif not id:match("^%u[%d%u]+$") then err_cat = ' ' .. set_error ('bad_asin');							-- asin doesn't begin with uppercase alpha end end if not is_set(domain) then domain = "com"; elseif in_array (domain, {'jp', 'uk'}) then			-- Japan, United Kingdom domain = "co." .. domain; elseif in_array (domain, {'au', 'br', 'mx'}) then	-- Australia, Brazil, Mexico domain = "com." .. domain; end local handler = cfg.id_handlers['ASIN']; return external_link_id({link=handler.link,		label=handler.label, prefix=handler.prefix .. domain .. "/dp/",		id=id, encode=handler.encode, separator = handler.separator}) .. err_cat; end

--[[--< A R X I V >

See: http://arxiv.org/help/arxiv_identifier

format and error check arXiv identifier. There are three valid forms of the identifier: the first form, valid only between date codes 9108 and 0703 is: arXiv:. /  where: is a string of alpha characters - may be hyphenated; no other punctuation is a string of alpha characters - may be hyphenated; no other punctuation is four digits in the form YYMM where YY is the last two digits of the four-digit year and MM is the month number January = 01 first digit of YY for this form can only 9 and 0 is a three-digit number is a 1 or more digit number preceded with a lowercase v; no spaces (undocumented) the second form, valid from April 2007 through December 2014 is: arXiv:. where: is four digits in the form YYMM where YY is the last two digits of the four-digit year and MM is the month number January = 01 is a four-digit number is a 1 or more digit number preceded with a lowercase v; no spaces

the third form, valid from January 2015 is: arXiv:. where: and are as defined for 0704-1412 is a five-digit number ]]

local function arxiv (id, class) local handler = cfg.id_handlers['ARXIV']; local year, month, version; local err_cat = ''; local text; if id:match("^%a[%a%.%-]+/[90]%d[01]%d%d%d%d$") or id:match("^%a[%a%.%-]+/[90]%d[01]%d%d%d%dv%d+$") then	-- test for the 9108-0703 format w/ & w/o version year, month = id:match("^%a[%a%.%-]+/([90]%d)([01]%d)%d%d%d[v%d]*$"); year = tonumber(year); month = tonumber(month); if ((not (90 year)) or (1 > month or 12 < month)) or		-- if invalid year or invalid month ((91 == year and 7 > month) or (7 == year and 3 < month)) then		-- if years ok, are starting and ending months ok? err_cat = ' ' .. set_error( 'bad_arxiv' );						-- set error message end elseif id:match("^%d%d[01]%d%.%d%d%d%d$") or id:match("^%d%d[01]%d%.%d%d%d%dv%d+$") then	-- test for the 0704-1412 w/ & w/o version year, month = id:match("^(%d%d)([01]%d)%.%d%d%d%d[v%d]*$"); year = tonumber(year); month = tonumber(month); if ((7 > year) or (14 < year) or (1 > month or 12 < month)) or			-- is year invalid or is month invalid? (doesn't test for future years) ((7 == year) and (4 > month)) then --or									-- when year is 07, is month invalid (before April)? err_cat = ' ' .. set_error( 'bad_arxiv' );						-- set error message end elseif id:match("^%d%d[01]%d%.%d%d%d%d%d$") or id:match("^%d%d[01]%d%.%d%d%d%d%dv%d+$") then	-- test for the 1501- format w/ & w/o version year, month = id:match("^(%d%d)([01]%d)%.%d%d%d%d%d[v%d]*$"); year = tonumber(year); month = tonumber(month); if ((15 > year) or (1 > month or 12 < month)) then						-- is year invalid or is month invalid? (doesn't test for future years) err_cat = ' ' .. set_error( 'bad_arxiv' );							-- set error message end else err_cat = ' ' .. set_error( 'bad_arxiv' );								-- arXiv id doesn't match any format end

text = external_link_id({link = handler.link, label = handler.label,			prefix=handler.prefix,id=id,separator=handler.separator, encode=handler.encode}) .. err_cat;

if is_set (class) then class = ' ' .. '//arxiv.org/archive/' .. class .. ' ' .. class .. '';	-- external link within square brackets, not wikilink else class = '';																-- empty string for concatenation end return text .. class; end

--[[ lccn normalization (http://www.loc.gov/marc/lccn-namespace.html#normalization) 1. Remove all blanks. 2. If there is a forward slash (/) in the string, remove it, and remove all characters to the right of the forward slash. 3. If there is a hyphen in the string:	a. Remove it.	b. Inspect the substring following (to the right of) the (removed) hyphen. Then (and assuming that steps 1 and 2 have been carried out):		1. All these characters should be digits, and there should be six or less. (not done in this function)		2. If the length of the substring is less than 6, left-fill the substring with zeroes until the length is six.

Returns a normalized lccn for lccn to validate. There is no error checking (step 3.b.1) performed in this function. ]]

local function normalize_lccn (lccn) lccn = lccn:gsub ("%s", "");									-- 1. strip whitespace

if nil ~= string.find (lccn,'/') then lccn = lccn:match ("(.-)/");								-- 2. remove forward slash and all character to the right of it	end

local prefix local suffix prefix, suffix = lccn:match ("(.+)%-(.+)");						-- 3.a remove hyphen by splitting the string into prefix and suffix

if nil ~= suffix then											-- if there was a hyphen suffix=string.rep("0", 6-string.len (suffix)) .. suffix;	-- 3.b.2 left fill the suffix with 0s if suffix length less than 6 lccn=prefix..suffix;										-- reassemble the lccn end return lccn; end

--[[ Format LCCN link and do simple error checking. LCCN is a character string 8-12 characters long. The length of the LCCN dictates the character type of the first 1-3 characters; the rightmost eight are always digits. http://info-uri.info/registry/OAIHandler?verb=GetRecord&metadataPrefix=reg&identifier=info:lccn/

length = 8 then all digits length = 9 then lccn[1] is lower case alpha length = 10 then lccn[1] and lccn[2] are both lower case alpha or both digits length = 11 then lccn[1] is lower case alpha, lccn[2] and lccn[3] are both lower case alpha or both digits length = 12 then lccn[1] and lccn[2] are both lower case alpha

]]

local function lccn(lccn) local handler = cfg.id_handlers['LCCN']; local err_cat = '';								-- presume that LCCN is valid local id = lccn;									-- local copy of the lccn

id = normalize_lccn (id);							-- get canonical form (no whitespace, hyphens, forward slashes) local len = id:len;								-- get the length of the lccn

if 8 == len then if id:match("[^%d]") then						-- if LCCN has anything but digits (nil if only digits) err_cat = ' ' .. set_error( 'bad_lccn' );	-- set an error message end elseif 9 == len then								-- LCCN should be adddddddd if nil == id:match("%l%d%d%d%d%d%d%d%d") then			-- does it match our pattern? err_cat = ' ' .. set_error( 'bad_lccn' );	-- set an error message end elseif 10 == len then								-- LCCN should be aadddddddd or dddddddddd if id:match("[^%d]") then							-- if LCCN has anything but digits (nil if only digits) ... if nil == id:match("^%l%l%d%d%d%d%d%d%d%d") then	-- ... see if it matches our pattern err_cat = ' ' .. set_error( 'bad_lccn' );	-- no match, set an error message end end elseif 11 == len then								-- LCCN should be aaadddddddd or adddddddddd if not (id:match("^%l%l%l%d%d%d%d%d%d%d%d") or id:match("^%l%d%d%d%d%d%d%d%d%d%d")) then	-- see if it matches one of our patterns err_cat = ' ' .. set_error( 'bad_lccn' );	-- no match, set an error message end elseif 12 == len then								-- LCCN should be aadddddddddd if not id:match("^%l%l%d%d%d%d%d%d%d%d%d%d") then	-- see if it matches our pattern err_cat = ' ' .. set_error( 'bad_lccn' );	-- no match, set an error message end else err_cat = ' ' .. set_error( 'bad_lccn' );		-- wrong length, set an error message end

if not is_set (err_cat) and nil ~= lccn:find ('%s') then err_cat = ' ' .. set_error( 'bad_lccn' );		-- lccn contains a space, set an error message end

return external_link_id({link = handler.link, label = handler.label,			prefix=handler.prefix,id=lccn,separator=handler.separator, encode=handler.encode}) .. err_cat; end

-- Format PMID and do simple error checking. PMIDs are sequential numbers beginning at 1 and counting up.  This code checks the PMID to see that it contains only digits and is less than test_limit; the value in local variable test_limit will need to be updated periodically as more PMIDs are issued.

local function pmid(id) local test_limit = 30000000;						-- update this value as PMIDs approach local handler = cfg.id_handlers['PMID']; local err_cat = '';								-- presume that PMID is valid if id:match("[^%d]") then							-- if PMID has anything but digits err_cat = ' ' .. set_error( 'bad_pmid' );		-- set an error message else												-- PMID is only digits local id_num = tonumber(id);					-- convert id to a number for range testing if 1 > id_num or test_limit < id_num then		-- if PMID is outside test limit boundaries err_cat = ' ' .. set_error( 'bad_pmid' );	-- set an error message end end return external_link_id({link = handler.link, label = handler.label,			prefix=handler.prefix,id=id,separator=handler.separator, encode=handler.encode}) .. err_cat; end

--[[--< I S _ E M B A R G O E D >--

Determines if a PMC identifier's online version is embargoed. Compares the date in |embargo= against today's date. If embargo date is in the future, returns the content of |embargo=; otherwise, returns and empty string because the embargo has expired or because
 * embargo= was not set in this cite.

]]

local function is_embargoed (embargo) if is_set (embargo) then local lang = mw.getContentLanguage; local good1, embargo_date, good2, todays_date; good1, embargo_date = pcall( lang.formatDate, lang, 'U', embargo ); good2, todays_date = pcall( lang.formatDate, lang, 'U' ); if good1 and good2 then													-- if embargo date and today's date are good dates if tonumber( embargo_date ) >= tonumber( todays_date ) then			-- is embargo date is in the future? return embargo;													-- still embargoed else add_maint_cat ('embargo') return '';														-- unset because embargo has expired end end end return '';																	-- |embargo= not set return empty string end

--[[--< P M C >

Format a PMC, do simple error checking, and check for embargoed articles.

The embargo parameter takes a date for a value. If the embargo date is in the future the PMC identifier will not be linked to the article. If the embargo date is today or in the past, or if it is empty or omitted, then the PMC identifier is linked to the article through the link at cfg.id_handlers['PMC'].prefix.

PMC embargo date testing is done in function is_embargoed which is called earlier because when the citation has |pmc= but does not have a |url= then |title= is linked with the PMC link. Function is_embargoed returns the embargo date if the PMC article is still embargoed, otherwise it returns an empty string.

PMCs are sequential numbers beginning at 1 and counting up. This code checks the PMC to see that it contains only digits and is less than test_limit; the value in local variable test_limit will need to be updated periodically as more PMCs are issued.

]]

local function pmc(id, embargo) local test_limit = 5000000;							-- update this value as PMCs approach local handler = cfg.id_handlers['PMC']; local err_cat = '';								-- presume that PMC is valid local text;

if id:match("[^%d]") then							-- if PMC has anything but digits err_cat = ' ' .. set_error( 'bad_pmc' );			-- set an error message else												-- PMC is only digits local id_num = tonumber(id);					-- convert id to a number for range testing if 1 > id_num or test_limit < id_num then		-- if PMC is outside test limit boundaries err_cat = ' ' .. set_error( 'bad_pmc' );		-- set an error message end end if is_set (embargo) then													-- is PMC is still embargoed? text="" .. handler.label .. ":" .. handler.separator .. id .. err_cat;	-- still embargoed so no external link else text = external_link_id({link = handler.link, label = handler.label,			-- no embargo date or embargo has expired, ok to link to article			prefix=handler.prefix,id=id,separator=handler.separator, encode=handler.encode}) .. err_cat; end return text; end

-- Formats a DOI and checks for DOI errors.

-- DOI names contain two parts: prefix and suffix separated by a forward slash. -- Prefix: directory indicator '10.' followed by a registrant code -- Suffix: character string of any length chosen by the registrant

-- This function checks a DOI name for: prefix/suffix. If the doi name contains spaces or endashes, -- or, if it ends with a period or a comma, this function will emit a bad_doi error message.

-- DOI names are case-insensitive and can incorporate any printable Unicode characters so the test for spaces, endash, -- and terminal punctuation may not be technically correct but it appears, that in practice these characters are rarely if ever used in doi names.

local function doi(id, inactive) local cat = "" local handler = cfg.id_handlers['DOI']; local text; if is_set(inactive) then local inactive_year = inactive:match("%d%d%d%d") or '';		-- try to get the year portion from the inactive date text = "" .. handler.label .. ":" .. id; if is_set(inactive_year) then table.insert( z.error_categories, "Pages with DOIs inactive since " .. inactive_year ); else table.insert( z.error_categories, "Pages with inactive DOIs" );	-- when inactive doesn't contain a recognizable year end inactive = " (" .. cfg.messages['inactive'] .. " " .. inactive .. ")" else text = external_link_id({link = handler.link, label = handler.label,			prefix=handler.prefix,id=id,separator=handler.separator, encode=handler.encode}) inactive = "" end

if nil == id:match("^10%.[^%s–]-/[^%s–]-[^%.,]$") then	-- doi must begin with '10.', must contain a fwd slash, must not contain spaces or endashes, and must not end with period or comma cat = ' ' .. set_error( 'bad_doi' ); end return text .. inactive .. cat end

--[[--< O P E N L I B R A R Y >

Formats an OpenLibrary link, and checks for associated errors.

]] local function openlibrary(id) local code = id:match("^%d+([AMW])$");										-- only digits followed by 'A', 'M', or 'W'	local handler = cfg.id_handlers['OL'];

if ( code == "A" ) then return external_link_id({link=handler.link, label=handler.label,			prefix=handler.prefix .. 'authors/OL',			id=id, separator=handler.separator,	encode = handler.encode}) elseif ( code == "M" ) then return external_link_id({link=handler.link, label=handler.label,			prefix=handler.prefix .. 'books/OL',			id=id, separator=handler.separator,	encode = handler.encode}) elseif ( code == "W" ) then return external_link_id({link=handler.link, label=handler.label,			prefix=handler.prefix .. 'works/OL',			id=id, separator=handler.separator,	encode = handler.encode}) else return external_link_id({link=handler.link, label=handler.label,			prefix=handler.prefix .. 'OL',			id=id, separator=handler.separator,	encode = handler.encode}) .. ' ' .. set_error( 'bad_ol' ); end end

--[[--< M E S S A G E _ I D >--

Validate and format a usenet message id. Simple error checking, looks for 'id-left@id-right' not enclosed in '<' and/or '>' angle brackets.

]]

local function message_id (id) local handler = cfg.id_handlers['USENETID'];

text = external_link_id({link = handler.link, label = handler.label,		prefix=handler.prefix,id=id,separator=handler.separator, encode=handler.encode}) if not id:match('^.+@.+$') or not id:match('^[^<].*[^>]$')then				-- doesn't have '@' or has one or first or last character is '< or '>' text = text .. ' ' .. set_error( 'bad_message_id' )						-- add an error message if the message id is invalid end return text end

--[[--< S E T _ T I T L E T Y P E >

This function sets default title types (equivalent to the citation including |type= ) for those templates that have defaults. Also handles the special case where it is desirable to omit the title type from the rendered citation (|type=none).

]]

local function set_titletype (cite_class, title_type) if is_set(title_type) then if "none" == title_type then title_type = "";													-- if |type=none then type parameter not displayed end return title_type;														-- if |type= has been set to any other value use that value end

return cfg.title_types [cite_class] or '';									-- set template's default title type; else empty string for concatenation end

--[[--< C L E A N _ I S B N >--

Removes irrelevant text and dashes from ISBN number Similar to that used for Special:BookSources

]]

local function clean_isbn( isbn_str ) return isbn_str:gsub( "[^-0-9X]", "" ); end

--[[--< E S C A P E _ L U A _ M A G I C _ C H A R S >--

Returns a string where all of lua's magic characters have been escaped. This is important because functions like string.gsub treat their pattern and replace strings as patterns, not literal strings. ]] local function escape_lua_magic_chars (argument) argument = argument:gsub("%%", "%%%%");										-- replace % with %% argument = argument:gsub("([%^%$%(%)%.%[%]%*%+%-%?])", "%%%1");				-- replace all other lua magic pattern characters return argument; end

--[[--< S T R I P _ A P O S T R O P H E _ M A R K U P >

Strip wiki italic and bold markup from argument so that it doesn't contaminate COinS metadata. This function strips common patterns of apostrophe markup. We presume that editors who have taken the time to markup a title have, as a result, provided valid markup. When they don't, some single apostrophes are left behind.

]]

local function strip_apostrophe_markup (argument) if not is_set (argument) then return argument; end

while true do		if argument:match ("%'%'%'%'%'") then									-- bold italic (5) argument=argument:gsub("%'%'%'%'%'", "");							-- remove all instances of it		elseif argument:match ("%'%'%'%'") then									-- italic start and end without content (4) argument=argument:gsub("%'%'%'%'", ""); elseif argument:match ("%'%'%'") then									-- bold (3) argument=argument:gsub("%'%'%'", ""); elseif argument:match ("%'%'") then										-- italic (2) argument=argument:gsub("%'%'", ""); else break; end end return argument;															-- done end

--[[--< M A K E _ C O I N S _ T I T L E >--

Makes a title for COinS from Title and / or ScriptTitle (or any other name-script pairs)

Apostrophe markup (bold, italics) is stripped from each value so that the COinS metadata isn't correupted with strings of %27%27... ]]

local function make_coins_title (title, script) if is_set (title) then title = strip_apostrophe_markup (title);								-- strip any apostrophe markup else title='';																-- if not set, make sure title is an empty string end if is_set (script) then script = script:gsub ('^%l%l%s*:%s*', '');								-- remove language prefix if present (script value may now be empty string) script = strip_apostrophe_markup (script);								-- strip any apostrophe markup else script='';																-- if not set, make sure script is an empty string end if is_set (title) and is_set (script) then script = ' ' .. script;													-- add a space before we concatenate end return title .. script;														-- return the concatenation end

--[[--< G E T _ C O I N S _ P A G E S >

Extract page numbers from external wikilinks in any of the |page=, |pages=, or |at= parameters for use in COinS.

]]

local function get_coins_pages (pages) local pattern; if not is_set (pages) then return pages; end								-- if no page numbers then we're done while true do		pattern = pages:match("%[(%w*:?//[^ ]+%s+)[%w%d].*%]");					-- pattern is the opening bracket, the url and following space(s): "[url " if nil == pattern then break; end										-- no more urls pattern = escape_lua_magic_chars (pattern);								-- pattern is not a literal string; escape lua's magic pattern characters pages = pages:gsub(pattern, "");										-- remove as many instances of pattern as possible end pages = pages:gsub("[%[%]]", "");											-- remove the brackets pages = pages:gsub("–", "-" );							-- replace endashes with hyphens pages = pages:gsub("&%w+;", "-" );						-- and replace html entities (– etc.) with hyphens; do we need to replace numerical entities like &#32; and the like? return pages; end

-- Gets the display text for a wikilink like A|B or B gives B local function remove_wiki_link( str ) return (str:gsub( "%[%[([^%[%]]*)%]%]", function(l) return l:gsub( "^[^|]*|(.*)$", "%1" ):gsub("^%s*(.-)%s*$", "%1"); end)); end

-- Converts a hyphen to a dash local function hyphen_to_dash( str ) if not is_set(str) or str:match( "[%[%]{}<>]" ) ~= nil then return str; end return str:gsub( '-', '–' ); end

--[[--< S A F E _ J O I N >

Joins a sequence of strings together while checking for duplicate separation characters.

]]

local function safe_join( tbl, duplicate_char ) --	Note: we use string functions here, rather than ustring functions.	This has considerably faster performance and should work correctly as 	long as the duplicate_char is strict ASCII. The strings	in tbl may be ASCII or UTF8. local str = '';																-- the output string local comp = '';															-- what does 'comp' mean? local end_chr = ''; local trim; for _, value in ipairs( tbl ) do		if value == nil then value = ''; end if str == '' then														-- if output string is empty str = value;														-- assign value to it (first time through the loop) elseif value ~= '' then if value:sub(1,1) == '<' then										-- Special case of values enclosed in spans and other markup. comp = value:gsub( "%b<>", "" );								-- remove html markup ( string -> string) else comp = value; end -- typically duplicate_char is sepc if comp:sub(1,1) == duplicate_char then								-- is first charactier same as duplicate_char? why test first character? --  Because individual string segments often (always?) begin with terminal punct for th --  preceding segment: 'First element' .. 'sepc next element' .. etc?				trim = false; end_chr = str:sub(-1,-1);										-- get the last character of the output string -- str = str .. "<HERE(enchr=" .. end_chr.. ")"					-- debug stuff? if end_chr == duplicate_char then								-- if same as separator str = str:sub(1,-2);										-- remove it				elseif end_chr == "'" then										-- if it might be wikimarkup if str:sub(-3,-1) == duplicate_char .. "" then			-- if last three chars of str are sepc str = str:sub(1, -4) .. "";							-- remove them and add back  elseif str:sub(-5,-1) == duplicate_char .. "]]" then		-- if last five chars of str are sepc]] trim = true;											-- why? why do this and next differently from previous? elseif str:sub(-4,-1) == duplicate_char .. "]" then		-- if last four chars of str are sepc] trim = true;											-- same question end elseif end_chr == "]" then										-- if it might be wikimarkup if str:sub(-3,-1) == duplicate_char .. "]]" then			-- if last three chars of str are sepc]] wikilink trim = true; elseif str:sub(-2,-1) == duplicate_char .. "]" then			-- if last two chars of str are sepc] external link trim = true; elseif str:sub(-4,-1) == duplicate_char .. "'']" then		-- normal case when |url=something & |title=Title. trim = true; end elseif end_chr == " " then										-- if last char of output string is a space if str:sub(-2,-1) == duplicate_char .. " " then				-- if last two chars of str are str = str:sub(1,-3);									-- remove them both end end

if trim then if value ~= comp then 										-- value does not equal comp when value contains html markup local dup2 = duplicate_char; if dup2:match( "%A" ) then dup2 = "%" .. dup2; end		-- if duplicate_char not a letter then escape it value = value:gsub( "(%b<>)" .. dup2, "%1", 1 )			-- remove duplicate_char if it follows html markup else value = value:sub( 2, -1 );								-- remove duplicate_char when it is first character end end end str = str .. value;													--add it to the output string end end return str; end

--[[--< I S _ G O O D _ V A N C _ N A M E >

For Vancouver Style, author/editor names are supposed to be rendered in Latin (read ASCII) characters. When a name uses characters that contain diacritical marks, those characters are to converted to the corresponding Latin character. When a name is written using a non-Latin alphabet or logogram, that name is to be transliterated into Latin characters. These things are not currently possible in this module so are left to the editor to do.

This test allows |first= and |last= names to contain any of the letters defined in the four Unicode Latin character sets C0 Controls and Basic Latin 0041–005A, 0061–007A C1 Controls and Latin-1 Supplement 00C0–00D6, 00D8–00F6, 00F8–00FF Latin Extended-A 0100–017F Latin Extended-B 0180–01BF, 01C4–024F


 * lastn= also allowed to contain hyphens, spaces, and apostrophes. (http://www.ncbi.nlm.nih.gov/books/NBK7271/box/A35029/)
 * firstn= also allowed to contain hyphens, spaces, apostrophes, and periods

At the time of this writing, I had to write the 'if nil == mw.ustring.find ...' test ouside of the code editor and paste it here because the code editor gets confused between character insertion point and cursor position.

]]

local function is_good_vanc_name (last, first) if nil == mw.ustring.find (last, "^[A-Za-zÀ-ÖØ-öø-ƿǄ-ɏ%-%s%']*$") or nil == mw.ustring.find (first, "^[A-Za-zÀ-ÖØ-öø-ƿǄ-ɏ%-%s%'%.]*$") then add_vanc_error ; return false;															-- not a string of latin characters; Vancouver required Romanization end; return true; end

--[[--< R E D U C E _ T O _ I N I T I A L S >--

Attempts to convert names to initials in support of |name-list-format=vanc.

Names in |firstn= may be separated by spaces or hyphens, or for initials, a period. See http://www.ncbi.nlm.nih.gov/books/NBK7271/box/A35062/.

Vancouver style requires family rank designations (Jr, II, III, etc) to be rendered as Jr, 2nd, 3rd, etc. This form is not currently supported by this code so correctly formed names like Smith JL 2nd are converted to Smith J2. See http://www.ncbi.nlm.nih.gov/books/NBK7271/box/A35085/.

This function uses ustring functions because firstname initials may be any of the unicode Latin characters accepted by is_good_vanc_name.

]]

local function reduce_to_initials(first) if mw.ustring.match(first, "^%u%u$") then return first end;					-- when first contains just two upper-case letters, nothing to do	local initials = {} local i = 0;																-- counter for number of initials for word in mw.ustring.gmatch(first, "[^%s%.%-]+") do						-- names separated by spaces, hyphens, or periods table.insert(initials, mw.ustring.sub(word,1,1))						-- Vancouver format does not include full stops. i = i + 1;																-- bump the counter if 2 <= i then break; end												-- only two initials allowed in Vancouver system; if 2, quit end return table.concat(initials)												-- Vancouver format does not include spaces. end

--[[--< L I S T _ P E O P L E >---

Formats a list of people (e.g. authors / editors)

]]

local function list_people(control, people, etal, list_name)					-- TODO: why is list_name here? not used in this function local sep; local namesep; local format = control.format local maximum = control.maximum local lastauthoramp = control.lastauthoramp; local text = {}

if 'vanc' == format then													-- Vancouver-like author/editor name styling? sep = ',';																-- name-list separator between authors is a comma namesep = ' ';															-- last/first separator is a space else sep = ';'																-- name-list separator between authors is a semicolon namesep = ', '															-- last/first separator is 	end if sep:sub(-1,-1) ~= " " then sep = sep .. " " end if is_set (maximum) and maximum < 1 then return "", 0; end					-- returned 0 is for EditorCount; not used for authors for i,person in ipairs(people) do		if is_set(person.last) then local mask = person.mask local one local sep_one = sep; if is_set (maximum) and i > maximum then etal = true; break; elseif (mask ~= nil) then local n = tonumber(mask) if (n ~= nil) then one = string.rep("&mdash;",n) else one = mask; sep_one = " "; end else one = person.last local first = person.first if is_set(first) then if ( "vanc" == format ) then								-- if vancouver format one = one:gsub ('%.', '');								-- remove periods from surnames (http://www.ncbi.nlm.nih.gov/books/NBK7271/box/A35029/) if not person.corporate and is_good_vanc_name (one, first) then					-- and name is all Latin characters; corporate authors not tested first = reduce_to_initials(first)					-- attempt to convert first name(s) to initials end end one = one .. namesep .. first end if is_set(person.link) and person.link ~= control.page_name then one = "" .. one .. ""				-- link author/editor if this page is not the author's/editor's page end end table.insert( text, one ) table.insert( text, sep_one ) end end

local count = #text / 2;													-- (number of names + number of separators) divided by 2 if count > 0 then if count > 1 and is_set(lastauthoramp) and not etal then text[#text-2] = " & ";												-- replace last separator with ampersand text end text[#text] = nil;														-- erase the last separator end local result = table.concat(text)											-- construct list if etal and is_set (result) then											-- etal may be set by |display-authors=etal but we might not have a last-first list result = result .. sep .. ' ' .. cfg.messages['et al'];					-- we've go a last-first list and etal so add et al.	end return result, count end

--[[--< A N C H O R _ I D >

Generates a CITEREF anchor ID if we have at least one name or a date. Otherwise returns an empty string.

namelist is one of the contributor-, author-, or editor-name lists chosen in that order. year is Year or anchor_year.

]] local function anchor_id (namelist, year) local names={};																-- a table for the one to four names and year for i,v in ipairs (namelist) do												-- loop through the list and take up to the first four last names names[i] = v.last if i == 4 then break end												-- if four then done end table.insert (names, year);													-- add the year at the end local id = table.concat(names);												-- concatenate names and year for CITEREF id	if is_set (id) then															-- if concatenation is not an empty string return "CITEREF" .. id;													-- add the CITEREF portion else return '';																-- return an empty string; no reason to include CITEREF id in this citation end end

--[[--< N A M E _ H A S _ E T A L >

Evaluates the content of author and editor name parameters for variations on the theme of et al. If found, the et al. is removed, a flag is set to true and the function returns the modified name and the flag.

This function never sets the flag to false but returns it's previous state because it may have been set by previous passes through this function or by the parameters |display-authors=etal or |display-editors=etal

]]

local function name_has_etal (name, etal, nocat)

if is_set (name) then														-- name can be nil in which case just return local etal_pattern = "[;,]? *[\"']*%f[%a][Ee][Tt] *[Aa][Ll][%.\"']*$"	-- variations on the 'et al' theme local others_pattern = "[;,]? *%f[%a]and [Oo]thers";					-- and alternate to et al. if name:match (etal_pattern) then										-- variants on et al.			name = name:gsub (etal_pattern, '');								-- if found, remove etal = true;														-- set flag (may have been set previously here or by |display-authors=etal) if not nocat then													-- no categorization for |vauthors= add_maint_cat ('etal');											-- and add a category if not already added end elseif name:match (others_pattern) then									-- if not 'et al.', then 'and others'? name = name:gsub (others_pattern, '');								-- if found, remove etal = true;														-- set flag (may have been set previously here or by |display-authors=etal) if not nocat then													-- no categorization for |vauthors= add_maint_cat ('etal');											-- and add a category if not already added end end end return name, etal;															-- end

--[[--< E X T R A C T _ N A M E S > Gets name list from the input arguments

Searches through args in sequential order to find |lastn= and |firstn= parameters (or their aliases), and their matching link and mask parameters. Stops searching when both |lastn= and |firstn= are not found in args after two sequential attempts: found |last1=, |last2=, and |last3= but doesn't find |last4= and |last5= then the search is done.

This function emits an error message when there is a |firstn= without a matching |lastn=. When there are 'holes' in the list of last names, |last1= and |last3= are present but |last2= is missing, an error message is emitted. |lastn= is not required to have a matching |firstn=.

When an author or editor parameter contains some form of 'et al.', the 'et al.' is stripped from the parameter and a flag (etal) returned that will cause list_people to add the static 'et al.' text from Module:Citation/CS1/Configuration. This keeps 'et al.' out of the template's metadata. When this occurs, the page is added to a maintenance category.

]]

local function extract_names(args, list_name) local names = {};			-- table of names local last;					-- individual name components local first; local link; local mask; local i = 1;				-- loop counter/indexer local n = 1;				-- output table indexer local count = 0;			-- used to count the number of times we haven't found a |last= (or alias for authors, |editor-last or alias for editors) local etal=false;			-- return value set to true when we find some form of et al. in an author parameter

local err_msg_list_name = list_name:match ("(%w+)List") .. 's list';		-- modify AuthorList or EditorList for use in error messages if necessary while true do last = select_one( args, cfg.aliases[list_name .. '-Last'], 'redundant_parameters', i );		-- search through args for name components beginning at 1 first = select_one( args, cfg.aliases[list_name .. '-First'], 'redundant_parameters', i ); link = select_one( args, cfg.aliases[list_name .. '-Link'], 'redundant_parameters', i ); mask = select_one( args, cfg.aliases[list_name .. '-Mask'], 'redundant_parameters', i );

last, etal = name_has_etal (last, etal, false);								-- find and remove variations on et al. first, etal = name_has_etal (first, etal, false);								-- find and remove variations on et al.

if first and not last then												-- if there is a firstn without a matching lastn table.insert( z.message_tail, { set_error( 'first_missing_last', {err_msg_list_name, i}, true ) } );	-- add this error message elseif not first and not last then										-- if both firstn and lastn aren't found, are we done? count = count + 1;													-- number of times we haven't found last and first if 2 <= count then													-- two missing names and we give up				break;															-- normal exit or there is a two-name hole in the list; can't tell which end else																	-- we have last with or without a first if is_set (link) and false == link_param_ok (link) then				-- do this test here in case link is missing last table.insert( z.message_tail, { set_error( 'bad_paramlink', list_name:match ("(%w+)List"):lower .. '-link' .. i )});			-- url or wikilink in author link; end names[n] = {last = last, first = first, link = link, mask = mask, corporate=false};	-- add this name to our names list (corporate for |vauthors= only) n = n + 1;															-- point to next location in the names table if 1 == count then													-- if the previous name was missing table.insert( z.message_tail, { set_error( 'missing_name', {err_msg_list_name, i-1}, true ) } );		-- add this error message end count = 0;															-- reset the counter, we're looking for two consecutive missing names end i = i + 1;																-- point to next args location end return names, etal;															-- all done, return our list of names end

--[[--< B U I L D _ I D _ L I S T >

Populates ID table from arguments using configuration settings. Loops through cfg.id_handlers and searches args for any of the parameters listed in each cfg.id_handlers['...'].parameters. If found, adds the parameter and value to the identifier list. Emits redundant error message is more than one alias exists in args

]]

local function extract_ids( args ) local id_list = {};															-- list of identifiers found in args for k, v in pairs( cfg.id_handlers ) do										-- k is uc identifier name as index to cfg.id_handlers; e.g. cfg.id_handlers['ISBN'], v is a table v = select_one( args, v.parameters, 'redundant_parameters' );			-- v.parameters is a table of aliases for k; here we pick one from args if present if is_set(v) then id_list[k] = v; end									-- if found in args, add identifier to our list end return id_list; end

--[[--< B U I L D _ I D _ L I S T >

Takes a table of IDs created by extract_ids and turns it into a table of formatted ID outputs.

inputs: id_list – table of identifiers built by extract_ids options – table of various template parameter values used to modify some manually handled identifiers

]]

local function build_id_list( id_list, options ) local new_list, handler = {};

function fallback(k) return { __index = function(t,i) return cfg.id_handlers[k][i] end } end; for k, v in pairs( id_list ) do												-- k is uc identifier name as index to cfg.id_handlers; e.g. cfg.id_handlers['ISBN'], v is a table -- fallback to read-only cfg handler = setmetatable( { ['id'] = v }, fallback(k) ); if handler.mode == 'external' then table.insert( new_list, {handler.label, external_link_id( handler ) } ); elseif handler.mode == 'internal' then table.insert( new_list, {handler.label, internal_link_id( handler ) } ); elseif handler.mode ~= 'manual' then error( cfg.messages['unknown_ID_mode'] ); elseif k == 'DOI' then table.insert( new_list, {handler.label, doi( v, options.DoiBroken ) } ); elseif k == 'ARXIV' then table.insert( new_list, {handler.label, arxiv( v, options.Class ) } ); elseif k == 'ASIN' then table.insert( new_list, {handler.label, amazon( v, options.ASINTLD ) } ); elseif k == 'LCCN' then table.insert( new_list, {handler.label, lccn( v ) } ); elseif k == 'OL' or k == 'OLA' then table.insert( new_list, {handler.label, openlibrary( v ) } ); elseif k == 'PMC' then table.insert( new_list, {handler.label, pmc( v, options.Embargo ) } ); elseif k == 'PMID' then table.insert( new_list, {handler.label, pmid( v ) } ); elseif k == 'ISMN' then table.insert( new_list, {handler.label, ismn( v ) } ); elseif k == 'ISSN' then table.insert( new_list, {handler.label, issn( v ) } ); elseif k == 'ISBN' then local ISBN = internal_link_id( handler ); if not check_isbn( v ) and not is_set(options.IgnoreISBN) then ISBN = ISBN .. set_error( 'bad_isbn', {}, false, " ", "" ); end table.insert( new_list, {handler.label, ISBN } ); elseif k == 'USENETID' then table.insert( new_list, {handler.label, message_id( v ) } ); else error( cfg.messages['unknown_manual_ID'] ); end end function comp( a, b )	-- used in following table.sort return a[1] < b[1]; end table.sort( new_list, comp ); for k, v in ipairs( new_list ) do		new_list[k] = v[2]; end return new_list; end

--[[--< C O I N S _ C L E A N U P >

Cleanup parameter values for the metadata by removing or replacing invisible characters and certain html entities.

2015-12-10: there is a bug in mw.text.unstripNoWiki. It replaced math stripmarkers with the appropriate content when it shouldn't. See https://phabricator.wikimedia.org/T121085 and Wikipedia_talk:Lua#stripmarkers_and_mw.text.unstripNoWiki.28.29

TODO: move the replacement patterns and replacement values into a table in /Configuration similar to the invisible characters table? ]]

local function coins_cleanup (value) value = mw.text.unstripNoWiki (value);										-- replace nowiki stripmarkers with their content value = value:gsub (' &#39;s ', "'s");	-- replace template with simple apostrophe-s value = value:gsub ('&zwj;\226\128\138\039\226\128\139', "'");				-- replace ' with simple apostrophe value = value:gsub ('\226\128\138\039\226\128\139', "'");					-- replace ' with simple apostrophe (as of 2015-12-11) value = value:gsub (' ', ' ');											-- replace  entity with plain space value = value:gsub ('\226\128\138', ' ');									-- replace hair space with plain space value = value:gsub ('&zwj;', '');											-- remove &zwj; entities value = value:gsub ('[\226\128\141\226\128\139]', '')						-- remove zero-width joiner, zero-width space value = value:gsub ('[\194\173\009\010\013]', ' ');							-- replace soft hyphen, horizontal tab, line feed, carriage return with plain space return value; end

--[[--< C O I N S >

COinS metadata (see ) allows automated tools to parse the citation information.

]]

local function COinS(data, class) if 'table' ~= type(data) or nil == next(data) then return ''; end

for k, v in pairs (data) do													-- spin through all of the metadata parameter values if 'ID_list' ~= k and 'Authors' ~= k then								-- except the ID_list and Author tables (author nowiki stripmarker done when Author table processed) data[k] = coins_cleanup (v); end end

local ctx_ver = "Z39.88-2004"; -- treat table strictly as an array with only set values. local OCinSoutput = setmetatable( {}, {		__newindex = function(self, key, value)			if is_set(value) then				rawset( self, #self+1, table.concat{ key, '=', mw.uri.encode( remove_wiki_link( value ) ) } );			end		end	}); if in_array (class, {'arxiv', 'journal', 'news'}) or (in_array (class, {'conference', 'interview', 'map', 'press release', 'web'}) and is_set(data.Periodical)) or 		('citation' == class and is_set(data.Periodical) and not is_set (data.Encyclopedia)) then OCinSoutput.rft_val_fmt = "info:ofi/fmt:kev:mtx:journal";			-- journal metadata identifier if 'arxiv' == class then											-- set genre according to the type of citation template we are rendering OCinSoutput["rft.genre"] = "preprint";							-- cite arxiv elseif 'conference' == class then OCinSoutput["rft.genre"] = "conference";						-- cite conference (when Periodical set) elseif 'web' == class then OCinSoutput["rft.genre"] = "unknown";							-- cite web (when Periodical set) else OCinSoutput["rft.genre"] = "article";							-- journal and other 'periodical' articles end OCinSoutput["rft.jtitle"] = data.Periodical;						-- journal only if is_set (data.Map) then OCinSoutput["rft.atitle"] = data.Map;							-- for a map in a periodical else OCinSoutput["rft.atitle"] = data.Title;							-- all other 'periodical' article titles end -- these used onlu for periodicals OCinSoutput["rft.ssn"] = data.Season;								-- keywords: winter, spring, summer, fall OCinSoutput["rft.chron"] = data.Chron;								-- free-form date components OCinSoutput["rft.volume"] = data.Volume;							-- does not apply to books OCinSoutput["rft.issue"] = data.Issue; OCinSoutput["rft.pages"] = data.Pages;								-- also used in book metadata

elseif 'thesis' ~= class then												-- all others except cite thesis are treated as 'book' metadata; genre distinguishes OCinSoutput.rft_val_fmt = "info:ofi/fmt:kev:mtx:book";					-- book metadata identifier if 'report' == class or 'techreport' == class then						-- cite report and cite techreport OCinSoutput["rft.genre"] = "report"; elseif 'conference' == class then										-- cite conference when Periodical not set OCinSoutput["rft.genre"] = "conference"; elseif in_array (class, {'book', 'citation', 'encyclopaedia', 'interview', 'map'}) then if is_set (data.Chapter) then OCinSoutput["rft.genre"] = "bookitem"; OCinSoutput["rft.atitle"] = data.Chapter;						-- book chapter, encyclopedia article, interview in a book, or map title else if 'map' == class or 'interview' == class then OCinSoutput["rft.genre"] = 'unknown';						-- standalone map or interview else OCinSoutput["rft.genre"] = 'book';							-- book and encyclopedia end end else	--{'audio-visual', 'AV-media-notes', 'DVD-notes', 'episode', 'interview', 'mailinglist', 'map', 'newsgroup', 'podcast', 'press release', 'serial', 'sign', 'speech', 'web'} OCinSoutput["rft.genre"] = "unknown"; end OCinSoutput["rft.btitle"] = data.Title;									-- book only OCinSoutput["rft.place"] = data.PublicationPlace;						-- book only OCinSoutput["rft.series"] = data.Series;								-- book only OCinSoutput["rft.pages"] = data.Pages;									-- book, journal OCinSoutput["rft.edition"] = data.Edition;								-- book only OCinSoutput["rft.pub"] = data.PublisherName;							-- book and dissertation else																		-- cite thesis OCinSoutput.rft_val_fmt = "info:ofi/fmt:kev:mtx:dissertation";			-- dissertation metadata identifier OCinSoutput["rft.title"] = data.Title;									-- dissertation (also patent but that is not yet supported) OCinSoutput["rft.degree"] = data.Degree;								-- dissertation only OCinSoutput['rft.inst'] = data.PublisherName;							-- book and dissertation end -- and now common parameters (as much as possible) OCinSoutput["rft.date"] = data.Date;										-- book, journal, dissertation for k, v in pairs( data.ID_list ) do										-- what to do about these? For now assume that they are common to all? if k == 'ISBN' then v = clean_isbn( v ) end local id = cfg.id_handlers[k].COinS; if string.sub( id or "", 1, 4 ) == 'info' then							-- for ids that are in the info:registry OCinSoutput["rft_id"] = table.concat{ id, "/", v }; elseif string.sub (id or "", 1, 3 ) == 'rft' then						-- for isbn, issn, eissn, etc that have defined COinS keywords OCinSoutput[ id ] = v;		elseif id then															-- when cfg.id_handlers[k].COinS is not nil OCinSoutput["rft_id"] = table.concat{ cfg.id_handlers[k].prefix, v };	-- others; provide a url end end

--		for k, v in pairs( data.ID_list ) do										-- what to do about these? For now assume that they are common to all?		local id, value = cfg.id_handlers[k].COinS;		if k == 'ISBN' then value = clean_isbn( v ); else value = v; end		if string.sub( id or "", 1, 4 ) == 'info' then			OCinSoutput["rft_id"] = table.concat{ id, "/", v };		else			OCinSoutput[ id ] = value;		end	end local last, first; for k, v in ipairs( data.Authors ) do		last, first = coins_cleanup (v.last), coins_cleanup (v.first or '');	-- replace any nowiki strip markers, non-printing or invisible characers if k == 1 then															-- for the first author name only if is_set(last) and is_set(first) then								-- set these COinS values if |first= and |last= specify the first author name OCinSoutput["rft.aulast"] = last;								-- book, journal, dissertation OCinSoutput["rft.aufirst"] = first;								-- book, journal, dissertation elseif is_set(last) then OCinSoutput["rft.au"] = last;									-- book, journal, dissertation -- otherwise use this form for the first name end else																	-- for all other authors if is_set(last) and is_set(first) then OCinSoutput["rft.au"] = table.concat{ last, ", ", first };		-- book, journal, dissertation elseif is_set(last) then OCinSoutput["rft.au"] = last;									-- book, journal, dissertation end end end

OCinSoutput.rft_id = data.URL; OCinSoutput.rfr_id = table.concat{ "info:sid/", mw.site.server:match( "[^/]*$" ), ":", data.RawPage }; OCinSoutput = setmetatable( OCinSoutput, nil ); -- sort with version string always first, and combine. table.sort( OCinSoutput ); table.insert( OCinSoutput, 1, "ctx_ver=" .. ctx_ver ); -- such as "Z39.88-2004" return table.concat(OCinSoutput, "&"); end

--[[--< G E T _ I S O 6 3 9 _ C O D E >

Validates language names provided in |language= parameter if not an ISO639-1 code. Handles the special case that is Norwegian where ISO639-1 code 'no' is mapped to language name 'Norwegian Bokmål' by Extention:CLDR.

Returns the language name and associated ISO639-1 code. Because case of the source may be incorrect or different from the case that Wikimedia uses, the name comparisons are done in lower case and when a match is found, the Wikimedia version (assumed to be correct) is returned along with the code. When there is no match, we return the original language name string.

mw.language.fetchLanguageNames will return a list of languages that aren't part of ISO639-1. Names that aren't ISO639-1 but that are included in the list will be found if that name is provided in the |language= parameter. For example, if |language=Samaritan Aramaic, that name will be found with the associated code 'sam', not an ISO639-1 code. When names are found and the associated code is not two characters, this function returns only the Wikimedia language name.

Adapted from code taken from Module:Check ISO 639-1.

]]

local function get_iso639_code (lang) if 'norwegian' == lang:lower then											-- special case related to Wikimedia remap of code 'no' at Extension:CLDR return 'Norwegian', 'no';												-- Make sure rendered version is properly capitalized end local languages = mw.language.fetchLanguageNames('en', 'all')				-- get a list of language names known to Wikimedia -- ('all' is required for North Ndebele, South Ndebele, and Ojibwa) local langlc = mw.ustring.lower(lang);										-- lower case version for comparisons for code, name in pairs(languages) do										-- scan the list to see if we can find our language if langlc == mw.ustring.lower(name) then if 2 ~= code:len then												-- ISO639-1 codes only return name;													-- so return the name but not the code end return name, code;													-- found it, return name to ensure proper capitalization and the ISO639-1 code end end return lang;																-- not valid language; return language in original case and nil for ISO639-1 code end

--[[--< L A N G U A G E _ P A R A M E T E R >--

Get language name from ISO639-1 code value provided. If a code is valid use the returned name; if not, then use the value that was provided with the language parameter.

There is an exception. There are three ISO639-1 codes for Norewegian language variants. There are two official variants: Norwegian Bokmål (code 'nb') and Norwegian Nynorsk (code 'nn'). The third, code 'no', is defined by ISO639-1 as 'Norwegian' though in Norway this is pretty much meaningless. However, it appears that on enwiki, editors are for the most part unaware of the nb and nn variants (compare page counts for these variants at Category:Articles with non-English-language external links.

Because Norwegian Bokmål is the most common language variant, Media wiki has been modified to return Norwegian Bokmål for ISO639-1 code 'no'. Here we undo that and return 'Norwegian' when editors use |language=no. We presume that editors don't know about the variants or can't descriminate between them.

See Help talk:Citation Style_1#An ISO 639-1 language name test

When |language= contains a valid ISO639-1 code, the page is assigned to the category for that code: Category:Norwegian-language sources (no) if the page is a mainspace page and the ISO639-1 code is not 'en'. Similarly, if the parameter is |language=Norwegian, it will be categorized in the same way.

This function supports multiple languages in the form |language=nb, French, th where the language names or codes are separated from each other by commas.

]]

local function language_parameter (lang) local code;																	-- the ISO639-1 two character code local name;																	-- the language name local language_list = {};													-- table of language names to be rendered local names_table = {};														-- table made from the value assigned to |language=

names_table = mw.text.split (lang, '%s*,%s*');								-- names should be a comma separated list

for _, lang in ipairs (names_table) do										-- reuse lang

if lang:match ('^%a%a%-') then											-- strip ietf language tags from code lang = lang:match ('(%a%a)%-')										-- keep only 639-1 code portion to lang; TODO: do something with 3166 alpha 2 country code? end if 2 == lang:len then													-- ISO639-1 language code are 2 characters (fetchLanguageName also supports 3 character codes) name = mw.language.fetchLanguageName( lang:lower, "en" );			-- get ISO 639-1 language name if Language is a proper code end if is_set (name) then													-- if Language specified a valid ISO639-1 code code = lang:lower;												-- save it		else name, code = get_iso639_code (lang);								-- attempt to get code from name (assign name here so that we are sure of proper capitalization) end if is_set (code) then if 'no' == code then name = 'Norwegian' end;						-- override wikimedia when code is 'no' if 'en' ~= code then												-- English not the language add_prop_cat ('foreign_lang_source', {name, code}) end else add_maint_cat ('unknown_lang');										-- add maint category if not already added end table.insert (language_list, name); name = '';																-- so we can reuse it	end code = #language_list														-- reuse code as number of languages in the list if 2 >= code then name = table.concat (language_list, ' and ')							-- insert ' and ' between two language names elseif 2 < code then language_list[code] = 'and ' .. language_list[code];					-- prepend last name with 'and ' name = table.concat (language_list, ', ')								-- and concatenate with ' ' separators end if 'English' == name then return '';																-- if one language and that language is English return an empty string (no annotation) end return (" " .. wrap_msg ('language', name));								-- otherwise wrap with '(in ...)' end

--[[--< S E T _ C S 1 _ S T Y L E >

Set style settings for CS1 citation templates. Returns separator and postscript settings

]]

local function set_cs1_style (ps) if not is_set (ps) then														-- unless explicitely set to something ps = '.';																-- terminate the rendered citation with a period end return '.', ps;																-- separator is a full stop end

--[[--< S E T _ C S 2 _ S T Y L E >

Set style settings for CS2 citation templates. Returns separator, postscript, ref settings

]]

local function set_cs2_style (ps, ref) if not is_set (ps) then														-- if |postscript= has not been set, set cs2 default ps = '';																-- make sure it isn't nil end if not is_set (ref) then													-- if |ref= is not set ref = "harv";															-- set default |ref=harv end return ',', ps, ref;														-- separator is a comma end

--[[--< G E T _ S E T T I N G S _ F R O M _ C I T E _ C L A S S >--

When |mode= is not set or when its value is invalid, use config.CitationClass and parameter values to establish rendered style.

]]

local function get_settings_from_cite_class (ps, ref, cite_class) local sep; if (cite_class == "citation") then											-- for citation templates (CS2) sep, ps, ref = set_cs2_style (ps, ref); else																		-- not a citation template so CS1 sep, ps = set_cs1_style (ps); end

return sep, ps, ref															-- return them all end

--[[--< S E T _ S T Y L E >

Establish basic style settings to be used when rendering the citation. Uses |mode= if set and valid or uses config.CitationClass from the template's #invoke: to establish style.

]]

local function set_style (mode, ps, ref, cite_class) local sep; if 'cs2' == mode then														-- if this template is to be rendered in CS2 (citation) style sep, ps, ref = set_cs2_style (ps, ref); elseif 'cs1' == mode then													-- if this template is to be rendered in CS1 (cite xxx) style sep, ps = set_cs1_style (ps); else																		-- anything but cs1 or cs2 sep, ps, ref = get_settings_from_cite_class (ps, ref, cite_class);		-- get settings based on the template's CitationClass end if 'none' == ps:lower then												-- if assigned value is 'none' then ps = '';																-- set to empty string end return sep, ps, ref end

--[=[-< I S _ P D F >--

Determines if a url has the file extension that is one of the pdf file extensions used by MediaWiki:Common.css when applying the pdf icon to external links.

returns true if file extension is one of the recognized extension, else false

]=]

local function is_pdf (url) return url:match ('%.pdf[%?#]?') or url:match ('%.PDF[%?#]?'); end

--[[--< S T Y L E _ F O R M A T >--

Applies css style to |format=, |chapter-format=, etc. Also emits an error message if the format parameter does not have a matching url parameter. If the format parameter is not set and the url contains a file extension that is recognized as a pdf document by MediaWiki's commons.css, this code will set the format parameter to (PDF) with the appropriate styling.

]]

local function style_format (format, url, fmt_param, url_param) if is_set (format) then format = wrap_style ('format', format);									-- add leading space, parenthases, resize if not is_set (url) then format = format .. set_error( 'format_missing_url', {fmt_param, url_param} );	-- add an error message end elseif is_pdf (url) then													-- format is not set so if url is a pdf file then format = wrap_style ('format', 'PDF');									-- set format to pdf else format = '';															-- empty string for concatenation end return format; end

--[[--< G E T _ D I S P L A Y _ A U T H O R S _ E D I T O R S >

Returns a number that may or may not limit the length of the author or editor name lists.

When the value assigned to |display-authors= is a number greater than or equal to zero, return the number and the previous state of the 'etal' flag (false by default but may have been set to true if the name list contains some variant of the text 'et al.').

When the value assigned to |display-authors= is the keyword 'etal', return a number that is one greater than the number of authors in the list and set the 'etal' flag true. This will cause the list_people to display all of the names in the name list followed by 'et al.'

In all other cases, returns nil and the previous state of the 'etal' flag.

]]

local function get_display_authors_editors (max, count, list_name, etal) if is_set (max) then if 'etal' == max:lower:gsub("[ '%.]", '') then						-- the :gsub portion makes 'etal' from a variety of 'et al.' spellings and stylings max = count + 1;													-- number of authors + 1 so display all author name plus et al.			etal = true;														-- overrides value set by extract_names elseif max:match ('^%d+$') then											-- if is a string of numbers max = tonumber (max);												-- make it a number if max >= count and 'authors' == list_name then	-- AUTHORS ONLY		-- if |display-xxxxors= value greater than or equal to number of authors/editors add_maint_cat ('disp_auth_ed', list_name); end else																	-- not a valid keyword or number table.insert( z.message_tail, { set_error( 'invalid_param_val', {'display-' .. list_name, max}, true ) } );		-- add error message max = nil;															-- unset end elseif 'authors' == list_name then		-- AUTHORS ONLY	need to clear implicit et al category max = count + 1;														-- number of authors + 1 end return max, etal; end

--[[--< E X T R A _ T E X T _ I N _ P A G E _ C H E C K >--

Adds page to Category:CS1 maint: extra text if |page= or |pages= has what appears to be some form of p. or pp. abbreviation in the first characters of the parameter content.

check Page and Pages for extraneous p, p., pp, and pp. at start of parameter value: good pattern: '^P[^%.P%l]' matches when |page(s)= begins PX or P# but not Px where x and X are letters and # is a dgiit bad pattern: '^[Pp][Pp]' matches matches when |page(s)= begins pp or pP or Pp or PP

]]

local function extra_text_in_page_check (page) --	local good_pattern = '^P[^%.P%l]'; local good_pattern = '^P[^%.Pp]';											-- ok to begin with uppercase P: P7 (pg 7 of section P) but not p123 (page 123) TODO: add Gg for PG or Pg? --	local bad_pattern = '^[Pp][Pp]'; local bad_pattern = '^[Pp]?[Pp]%.?[ %d]';

if not page:match (good_pattern) and (page:match (bad_pattern) or page:match ('^[Pp]ages?')) then add_maint_cat ('extra_text'); end --		if Page:match ('^[Pp]?[Pp]%.?[ %d]') or Page:match ('^[Pp]ages?[ %d]') or --			Pages:match ('^[Pp]?[Pp]%.?[ %d]') or  Pages:match ('^[Pp]ages?[ %d]') then --				add_maint_cat ('extra_text'); --		end end

--[[--< P A R S E _ V A U T H O R S _ V E D I T O R S >

This function extracts author / editor names from |vauthors= or |veditors= and finds matching |xxxxor-maskn= and
 * xxxxor-linkn= in args. It then returns a table of assembled names just as extract_names does.

Author / editor names in |vauthors= or |veditors= must be in Vancouver system style. Corporate or institutional names may sometimes be required and because such names will often fail the is_good_vanc_name and other format compliance tests, are wrapped in doubled paranethese ((corporate name)) to suppress the format tests.

This function sets the vancouver error when a reqired comma is missing and when there is a space between an author's initials.

]]

local function parse_vauthors_veditors (args, vparam, list_name) local names = {};															-- table of names assembled from |vauthors=, |author-maskn=, |author-linkn= local v_name_table = {}; local etal = false;															-- return value set to true when we find some form of et al. vauthors parameter local last, first, link, mask; local corporate = false;

vparam, etal = name_has_etal (vparam, etal, true);							-- find and remove variations on et al. do not categorize (do it here because et al. might have a period) if vparam:find ('%[%[') or vparam:find ('%]%]')	then						-- no wikilinking vauthors names add_vanc_error ; end v_name_table = mw.text.split(vparam, "%s*,%s*")								-- names are separated by commas

for i, v_name in ipairs(v_name_table) do		if v_name:match ('^%(%(.+%)%)$') then									-- corporate authors are wrapped in doubled parenthese to supress vanc formatting and error detection first = '';															-- set to empty string for concatenation and because it may have been set for previous author/editor last = v_name:match ('^%(%((.+)%)%)$') corporate = true; elseif string.find(v_name, "%s") then lastfirstTable = {} lastfirstTable = mw.text.split(v_name, "%s") first = table.remove(lastfirstTable);								-- removes and returns value of last element in table which should be author intials last = table.concat(lastfirstTable, " ")							-- returns a string that is the concatenation of all other names that are not initials if mw.ustring.match (last, '%a+%s+%u+%s+%a+') or mw.ustring.match (v_name, ' %u %u$') then add_vanc_error ;												-- matches last II last; the case when a comma is missing or a space between two intiials end else first = '';															-- set to empty string for concatenation and because it may have been set for previous author/editor last = v_name;														-- last name or single corporate name? Doesn't support multiword corporate names? do we need this? end if is_set (first) and not mw.ustring.match (first, "^%u?%u$") then		-- first shall contain one or two upper-case letters, nothing else add_vanc_error ; end -- this from extract_names link = select_one( args, cfg.aliases[list_name .. '-Link'], 'redundant_parameters', i ); mask = select_one( args, cfg.aliases[list_name .. '-Mask'], 'redundant_parameters', i ); names[i] = {last = last, first = first, link = link, mask = mask, corporate=corporate};		-- add this assembled name to our names list end return names, etal;															-- all done, return our list of names end

--[[--< S E L E C T _ A U T H O R _ E D I T O R _ S O U R C E >

Select one of |authors=, |authorn= / |lastn / firstn=, or |vauthors= as the source of the author name list or select one of |editors=, |editorn= / editor-lastn= / |editor-firstn= or |veditors= as the source of the editor name list.

Only one of these appropriate three will be used. The hierarchy is: |authorn= (and aliases) highest and |authors= lowest and similarly, |editorn= (and aliases) highest and |editors= lowest

When looking for |authorn= / |editorn= parameters, test |xxxxor1= and |xxxxor2= (and all of their aliases); stops after the second test which mimicks the test used in extract_names when looking for a hole in the author name list. There may be a better way to do this, I just haven't discovered what that way is.

Emits an error message when more than one xxxxor name source is provided.

In this function, vxxxxors = vauthors or veditors; xxxxors = authors or editors as appropriate.

]]

local function select_author_editor_source (vxxxxors, xxxxors, args, list_name) local lastfirst = false; if select_one( args, cfg.aliases[list_name .. '-Last'], 'none', 1 ) or		-- do this twice incase we have a first 1 without a last1 select_one( args, cfg.aliases[list_name .. '-Last'], 'none', 2 ) then lastfirst=true; end

if (is_set (vxxxxors) and true == lastfirst) or								-- these are the three error conditions (is_set (vxxxxors) and is_set (xxxxors)) or		(true == lastfirst and is_set (xxxxors)) then local err_name; if 'AuthorList' == list_name then									-- figure out which name should be used in error message err_name = 'author'; else err_name = 'editor'; end table.insert( z.message_tail, { set_error( 'redundant_parameters', {err_name .. '-name-list parameters'}, true ) } );				-- add error message end

if true == lastfirst then return 1 end;										-- return a number indicating which author name source to use if is_set (vxxxxors) then return 2 end; if is_set (xxxxors) then return 3 end; return 1;																	-- no authors so return 1; this allows missing author name test to run in case there is a first without last end

--[[--< I S _ V A L I D _ P A R A M E T E R _ V A L U E >--

This function is used to validate a parameter's assigned value for those parameters that have only a limited number of allowable values (yes, y, true, no, etc). When the parameter value has not been assigned a value (missing or empty in the source template) the function refurns true. If the parameter value is one of the list of allowed values returns true; else, emits an error message and returns false.

]]

local function is_valid_parameter_value (value, name, possible) if not is_set (value) then return true;															-- an empty parameter is ok	elseif in_array(value:lower, possible) then return true; else table.insert( z.message_tail, { set_error( 'invalid_param_val', {name, value}, true ) } );	-- not an allowed value so add error message return false end end

--[[--< T E R M I N A T E _ N A M E _ L I S T >

This function terminates a name list (author, contributor, editor) with a separator character (sepc) and a space when the last character is not a sepc character or when the last three characters are not sepc followed by two closing square brackets (close of a wikilink). When either of these is true, the name_list is terminated with a single space character.

]]

local function terminate_name_list (name_list, sepc) if (string.sub (name_list,-1,-1) == sepc) or (string.sub (name_list,-3,-1) == sepc .. ']]') then	-- if last name in list ends with sepc char return name_list .. " ";												-- don't add another else return name_list .. sepc .. ' ';										-- otherwise terninate the name list end end

--[[-< F O R M A T _ V O L U M E _ I S S U E >

returns the concatenation of the formatted volume and issue parameters as a single string; or formatted volume or formatted issue, or an empty string if neither are set.

]] local function format_volume_issue (volume, issue, cite_class, origin, sepc, lower) if not is_set (volume) and not is_set (issue) then return ''; end if 'magazine' == cite_class or (in_array (cite_class, {'citation', 'map'}) and 'magazine' == origin) then if is_set (volume) and is_set (issue) then return wrap_msg ('vol-no', {sepc, volume, issue}, lower); elseif is_set (volume) then return wrap_msg ('vol', {sepc, volume}, lower); else return wrap_msg ('issue', {sepc, issue}, lower); end end local vol = ''; if is_set (volume) then if (4 < mw.ustring.len(volume)) then vol = substitute (cfg.messages['j-vol'], {sepc, volume}); else vol = wrap_style ('vol-bold', hyphen_to_dash(volume)); end end if is_set (issue) then return vol .. substitute (cfg.messages['j-issue'], issue); end return vol; end

--[[-< F O R M A T _ P A G E S _ S H E E T S >-

adds static text to one of |page(s)= or |sheet(s)= values and returns it with all of the others set to empty strings. The return order is: page, pages, sheet, sheets

Singular has priority over plural when both are provided.

]]

local function format_pages_sheets (page, pages, sheet, sheets, cite_class, origin, sepc, nopp, lower) if 'map' == cite_class then													-- only cite map supports sheet(s) as in-source locators if is_set (sheet) then if 'journal' == origin then return , , wrap_msg ('j-sheet', sheet, lower), ''; else return , , wrap_msg ('sheet', {sepc, sheet}, lower), ''; end elseif is_set (sheets) then if 'journal' == origin then return , , '', wrap_msg ('j-sheets', sheets, lower); else return , , '', wrap_msg ('sheets', {sepc, sheets}, lower); end end end

local is_journal = 'journal' == cite_class or (in_array (cite_class, {'citation', 'map'}) and 'journal' == origin);

if is_set (page) then if is_journal then return substitute (cfg.messages['j-page(s)'], page), , , ''; elseif not nopp then return substitute (cfg.messages['p-prefix'], {sepc, page}), , , ''; else return substitute (cfg.messages['nopp'], {sepc, page}), , , ''; end elseif is_set(pages) then if is_journal then return substitute (cfg.messages['j-page(s)'], pages), , , ''; elseif tonumber(pages) ~= nil and not nopp then										-- if pages is only digits, assume a single page number return , substitute (cfg.messages['p-prefix'], {sepc, pages}), , ''; elseif not nopp then return , substitute (cfg.messages['pp-prefix'], {sepc, pages}), , ''; else return , substitute (cfg.messages['nopp'], {sepc, pages}), , ''; end end return , , , ;														-- return empty strings end

--[[--< C I T A T I O N 0 >

This is the main function doing the majority of the citation formatting.

]]

local function citation0( config, args) -- 	Load Input Parameters	The argument_wrapper facilitates the mapping of multiple aliases to single internal variable. local A = argument_wrapper( args ); local i

-- Pick out the relevant fields from the arguments. Different citation templates -- define different field names for the same underlying things. local author_etal; local a	= {};																-- authors list from |lastn= / |firstn= pairs or |vauthors= local Authors; local NameListFormat = A['NameListFormat'];

do																			-- to limit scope of selected local selected = select_author_editor_source (A['Vauthors'], A['Authors'], args, 'AuthorList'); if 1 == selected then a, author_etal = extract_names (args, 'AuthorList');				-- fetch author list from |authorn= / |lastn= / |firstn=, |author-linkn=, and |author-maskn= elseif 2 == selected then NameListFormat = 'vanc';											-- override whatever |name-list-format= might be			a, author_etal = parse_vauthors_veditors (args, args.vauthors, 'AuthorList');	-- fetch author list from |vauthors=, |author-linkn=, and |author-maskn= elseif 3 == selected then Authors = A['Authors'];												-- use content of |authors= end end

local Coauthors = A['Coauthors']; local Others = A['Others'];

local editor_etal; local e	= {};																-- editors list from |editor-lastn= / |editor-firstn= pairs or |veditors= local Editors;

do																			-- to limit scope of selected local selected = select_author_editor_source (A['Veditors'], A['Editors'], args, 'EditorList'); if 1 == selected then e, editor_etal = extract_names (args, 'EditorList');				-- fetch editor list from |editorn= / |editor-lastn= / |editor-firstn=, |editor-linkn=, and |editor-maskn= elseif 2 == selected then NameListFormat = 'vanc';											-- override whatever |name-list-format= might be			e, editor_etal = parse_vauthors_veditors (args, args.veditors, 'EditorList');	-- fetch editor list from |veditors=, |editor-linkn=, and |editor-maskn= elseif 3 == selected then Editors = A['Editors'];												-- use content of |editors= end end

local t = {};																-- translators list from |translator-lastn= / translator-firstn= pairs local Translators;															-- assembled translators name list t = extract_names (args, 'TranslatorList');									-- fetch translator list from |translatorn= / |translator-lastn=, -firstn=, -linkn=, -maskn= local c = {};																-- contributors list from |contributor-lastn= / contributor-firstn= pairs local Contributors;															-- assembled contributors name list local Contribution = A['Contribution']; if in_array(config.CitationClass, {"book","citation"}) and not is_set(A['Periodical']) then	-- |contributor= and |contribution= only supported in book cites c = extract_names (args, 'ContributorList');							-- fetch contributor list from |contributorn= / |contributor-lastn=, -firstn=, -linkn=, -maskn= if 0 < #c then if not is_set (Contribution) then									-- |contributor= requires |contribution= table.insert( z.message_tail, { set_error( 'contributor_missing_required_param', 'contribution')});	-- add missing contribution error message c = {};															-- blank the contributors' table; it is used as a flag later end if 0 == #a then														-- |contributor= requires |author= table.insert( z.message_tail, { set_error( 'contributor_missing_required_param', 'author')});	-- add missing author error message c = {};															-- blank the contributors' table; it is used as a flag later end end else																		-- if not a book cite if select_one (args, cfg.aliases['ContributorList-Last'], 'redundant_parameters', 1 ) then	-- are there contributor name list parameters? table.insert( z.message_tail, { set_error( 'contributor_ignored')});	-- add contributor ignored error message end Contribution = nil;														-- unset end

if not is_valid_parameter_value (NameListFormat, 'name-list-format', cfg.keywords['name-list-format']) then			-- only accepted value for this parameter is 'vanc' NameListFormat = '';													-- anything else, set to empty string end

local Year = A['Year']; local PublicationDate = A['PublicationDate']; local OrigYear = A['OrigYear']; local Date = A['Date']; local LayDate = A['LayDate']; - Get title data local Title = A['Title']; local ScriptTitle = A['ScriptTitle']; local BookTitle = A['BookTitle']; local Conference = A['Conference']; local TransTitle = A['TransTitle']; local TitleNote = A['TitleNote']; local TitleLink = A['TitleLink']; if is_set (TitleLink) and false == link_param_ok (TitleLink) then table.insert( z.message_tail, { set_error( 'bad_paramlink', A:ORIGIN('TitleLink'))});		-- url or wikilink in |title-link=; end

local Chapter = A['Chapter']; local ScriptChapter = A['ScriptChapter']; local ChapterLink	-- = A['ChapterLink'];									-- deprecated as a parameter but still used internally by cite episode local TransChapter = A['TransChapter']; local TitleType = A['TitleType']; local Degree = A['Degree']; local Docket = A['Docket']; local ArchiveFormat = A['ArchiveFormat']; local ArchiveURL = A['ArchiveURL']; local URL = A['URL'] local URLorigin = A:ORIGIN('URL');											-- get name of parameter that holds URL local ChapterURL = A['ChapterURL']; local ChapterURLorigin = A:ORIGIN('ChapterURL');							-- get name of parameter that holds ChapterURL local ConferenceFormat = A['ConferenceFormat']; local ConferenceURL = A['ConferenceURL']; local ConferenceURLorigin = A:ORIGIN('ConferenceURL');						-- get name of parameter that holds ConferenceURL local Periodical = A['Periodical']; local Periodical_origin = A:ORIGIN('Periodical');							-- get the name of the periodical parameter

local Series = A['Series']; local Volume; local Issue; local Page; local Pages; local At;

if in_array (config.CitationClass, cfg.templates_using_volume) and not ('conference' == config.CitationClass and not is_set (Periodical)) then Volume = A['Volume']; end if in_array (config.CitationClass, cfg.templates_using_issue) and not (in_array (config.CitationClass, {'conference', 'map'}) and not is_set (Periodical))then Issue = A['Issue']; end local Position = ''; if not in_array (config.CitationClass, cfg.templates_not_using_page) then Page = A['Page']; Pages = hyphen_to_dash( A['Pages'] ); At = A['At']; end

local Edition = A['Edition']; local PublicationPlace = A['PublicationPlace'] local Place = A['Place']; local PublisherName = A['PublisherName']; local RegistrationRequired = A['RegistrationRequired']; if not is_valid_parameter_value (RegistrationRequired, 'registration', cfg.keywords ['yes_true_y']) then RegistrationRequired=nil; end local SubscriptionRequired = A['SubscriptionRequired']; if not is_valid_parameter_value (SubscriptionRequired, 'subscription', cfg.keywords ['yes_true_y']) then SubscriptionRequired=nil; end

local Via = A['Via']; local AccessDate = A['AccessDate']; local ArchiveDate = A['ArchiveDate']; local Agency = A['Agency']; local DeadURL = A['DeadURL'] if not is_valid_parameter_value (DeadURL, 'dead-url', cfg.keywords ['deadurl']) then	-- set in config.defaults to 'yes' DeadURL = '';														-- anything else, set to empty string end

local Language = A['Language']; local Format = A['Format']; local ChapterFormat = A['ChapterFormat']; local DoiBroken = A['DoiBroken']; local ID = A['ID']; local ASINTLD = A['ASINTLD']; local IgnoreISBN = A['IgnoreISBN']; if not is_valid_parameter_value (IgnoreISBN, 'ignore-isbn-error', cfg.keywords ['yes_true_y']) then IgnoreISBN = nil;													-- anything else, set to empty string end local Embargo = A['Embargo']; local Class = A['Class'];													-- arxiv class identifier

local ID_list = extract_ids( args );

local Quote = A['Quote'];

local LayFormat = A['LayFormat']; local LayURL = A['LayURL']; local LaySource = A['LaySource']; local Transcript = A['Transcript']; local TranscriptFormat = A['TranscriptFormat']; local TranscriptURL = A['TranscriptURL'] local TranscriptURLorigin = A:ORIGIN('TranscriptURL');						-- get name of parameter that holds TranscriptURL

local LastAuthorAmp = A['LastAuthorAmp']; if not is_valid_parameter_value (LastAuthorAmp, 'last-author-amp', cfg.keywords ['yes_true_y']) then LastAuthorAmp = nil;													-- set to empty string end local no_tracking_cats = A['NoTracking']; if not is_valid_parameter_value (no_tracking_cats, 'no-tracking', cfg.keywords ['yes_true_y']) then no_tracking_cats = nil;												-- set to empty string end

--these are used by cite interview local Callsign = A['Callsign']; local City = A['City']; local Program = A['Program'];

--local variables that are not cs1 parameters local use_lowercase;														-- controls capitalization of certain static text local this_page = mw.title.getCurrentTitle;								-- also used for COinS and for language local anchor_year;															-- used in the CITEREF identifier local COinS_date = {};														-- holds date info extracted from |date= for the COinS metadata by Module:Date verification

-- set default parameter values defined by |mode= parameter. If |mode= is empty or omitted, use CitationClass to set these values local Mode = A['Mode']; if not is_valid_parameter_value (Mode, 'mode', cfg.keywords['mode']) then Mode = ''; end local sepc;											-- separator between citation elements for CS1 a period, for CS2, a comma local PostScript; local Ref; sepc, PostScript, Ref = set_style (Mode:lower, A['PostScript'], A['Ref'], config.CitationClass); use_lowercase = ( sepc == ',' );					-- used to control capitalization for certain static text

--check this page to see if it is in one of the namespaces that cs1 is not supposed to add to the error categories if not is_set (no_tracking_cats) then										-- ignore if we are already not going to categorize this page if in_array (this_page.nsText, cfg.uncategorized_namespaces) then no_tracking_cats = "true";											-- set no_tracking_cats end for _,v in ipairs (cfg.uncategorized_subpages) do						-- cycle through page name patterns if this_page.text:match (v) then									-- test page name against each pattern no_tracking_cats = "true";										-- set no_tracking_cats break;															-- bail out if one is found end end end

-- check for extra |page=, |pages= or |at= parameters. (also sheet and sheets while we're at it) select_one( args, {'page', 'p', 'pp', 'pages', 'at', 'sheet', 'sheets'}, 'redundant_parameters' );		-- this is a dummy call simply to get the error message and category

local NoPP = A['NoPP'] if is_set (NoPP) and is_valid_parameter_value (NoPP, 'nopp', cfg.keywords ['yes_true_y']) then NoPP = true; else NoPP = nil;																-- unset, used as a flag later end

if is_set(Page) then if is_set(Pages) or is_set(At) then Pages = '';															-- unset the others At = ''; end extra_text_in_page_check (Page);										-- add this page to maint cat if |page= value begins with what looks like p. or pp.	elseif is_set(Pages) then if is_set(At) then At = '';															-- unset end extra_text_in_page_check (Pages);										-- add this page to maint cat if |pages= value begins with what looks like p. or pp.	end

-- both |publication-place= and |place= (|location=) allowed if different if not is_set(PublicationPlace) and is_set(Place) then PublicationPlace = Place;							-- promote |place= (|location=) to |publication-place end if PublicationPlace == Place then Place = ''; end		-- don't need both if they are the same --[[ Parameter remapping for cite encyclopedia: When the citation has these parameters:	|encyclopedia and |title then map |title to |article and |encyclopedia to |title	|encyclopedia and |article then map |encyclopedia to |title	|encyclopedia then map |encyclopedia to |title

|trans_title maps to |trans_chapter when |title is re-mapped |url maps to |chapterurl when |title is remapped

All other combinations of |encyclopedia, |title, and |article are not modified

]]

local Encyclopedia = A['Encyclopedia'];

if ( config.CitationClass == "encyclopaedia" ) or ( config.CitationClass == "citation" and is_set (Encyclopedia)) then	-- test code for citation if is_set(Periodical) then												-- Periodical is set when |encyclopedia is set if is_set(Title) or is_set (ScriptTitle) then if not is_set(Chapter) then Chapter = Title;											-- |encyclopedia and |title are set so map |title to |article and |encyclopedia to |title ScriptChapter = ScriptTitle; TransChapter = TransTitle; ChapterURL = URL; if not is_set (ChapterURL) and is_set (TitleLink) then Chapter=  .. Chapter .. ; end Title = Periodical; ChapterFormat = Format; Periodical = '';											-- redundant so unset TransTitle = ''; URL = ''; Format = ''; TitleLink = ''; ScriptTitle = ''; end else																-- |title not set Title = Periodical;												-- |encyclopedia set and |article set or not set so map |encyclopedia to |title Periodical = '';												-- redundant so unset end end end

-- Special case for cite techreport. if (config.CitationClass == "techreport") then								-- special case for cite techreport if is_set(A['Number']) then													-- cite techreport uses 'number', which other citations alias to 'issue' if not is_set(ID) then												-- can we use ID for the "number"? ID = A['Number'];													-- yes, use it			else																-- ID has a value so emit error message table.insert( z.message_tail, { set_error('redundant_parameters', {wrap_style ('parameter', 'id') .. ' and ' .. wrap_style ('parameter', 'number')}, true )}); end end end

-- special case for cite interview if (config.CitationClass == "interview") then if is_set(Program) then ID = ' ' .. Program; end if is_set(Callsign) then if is_set(ID) then ID = ID .. sepc .. ' ' .. Callsign; else ID = ' ' .. Callsign; end end if is_set(City) then if is_set(ID) then ID = ID .. sepc .. ' ' .. City; else ID = ' ' .. City; end end

if is_set(Others) then if is_set(TitleType) then Others = ' ' .. TitleType .. ' with ' .. Others; TitleType = ''; else Others = ' ' .. 'Interview with ' .. Others; end else Others = '(Interview)'; end end

-- special case for cite mailing list if (config.CitationClass == "mailinglist") then Periodical = A ['MailingList']; elseif 'mailinglist' == A:ORIGIN('Periodical') then Periodical = '';														-- unset because mailing list is only used for cite mailing list end

-- Account for the oddity that is, before generation of COinS data. if 'conference' == config.CitationClass then if is_set(BookTitle) then Chapter = Title; --			ChapterLink = TitleLink;											-- |chapterlink= is deprecated ChapterURL = URL; ChapterURLorigin = URLorigin; URLorigin = ''; ChapterFormat = Format; TransChapter = TransTitle; Title = BookTitle; Format = ''; --			TitleLink = ''; TransTitle = ''; URL = ''; end elseif 'speech' ~= config.CitationClass then Conference = '';														-- not cite conference or cite speech so make sure this is empty string end

-- cite map oddities local Cartography = ""; local Scale = ""; local Sheet = A['Sheet'] or ''; local Sheets = A['Sheets'] or ''; if config.CitationClass == "map" then Chapter = A['Map']; ChapterURL = A['MapURL']; TransChapter = A['TransMap']; ChapterURLorigin = A:ORIGIN('MapURL'); ChapterFormat = A['MapFormat']; Cartography = A['Cartography']; if is_set( Cartography ) then Cartography = sepc .. " " .. wrap_msg ('cartography', Cartography, use_lowercase); end Scale = A['Scale']; if is_set( Scale ) then Scale = sepc .. " " .. Scale; end end

-- Account for the oddities that are and, before generation of COinS data. if 'episode' == config.CitationClass or 'serial' == config.CitationClass then local AirDate = A['AirDate']; local SeriesLink = A['SeriesLink']; if is_set (SeriesLink) and false == link_param_ok (SeriesLink) then table.insert( z.message_tail, { set_error( 'bad_paramlink', A:ORIGIN('SeriesLink'))}); end local Network = A['Network']; local Station = A['Station']; local s, n = {}, {}; -- do common parameters first if is_set(Network) then table.insert(n, Network); end if is_set(Station) then table.insert(n, Station); end ID = table.concat(n, sepc .. ' '); if not is_set (Date) and is_set (AirDate) then							-- promote airdate to date Date = AirDate; end

if 'episode' == config.CitationClass then								-- handle the oddities that are strictly local Season = A['Season']; local SeriesNumber = A['SeriesNumber'];

if is_set (Season) and is_set (SeriesNumber) then					-- these are mutually exclusive so if both are set table.insert( z.message_tail, { set_error( 'redundant_parameters', {wrap_style ('parameter', 'season') .. ' and ' .. wrap_style ('parameter', 'seriesno')}, true ) } );		-- add error message SeriesNumber = '';												-- unset; prefer |season= over |seriesno= end -- assemble a table of parts concatenated later into Series if is_set(Season) then table.insert(s, wrap_msg ('season', Season, use_lowercase)); end if is_set(SeriesNumber) then table.insert(s, wrap_msg ('series', SeriesNumber, use_lowercase)); end if is_set(Issue) then table.insert(s, wrap_msg ('episode', Issue, use_lowercase)); end Issue = '';															-- unset because this is not a unique parameter Chapter = Title;													-- promote title parameters to chapter ScriptChapter = ScriptTitle; ChapterLink = TitleLink;											-- alias episodelink TransChapter = TransTitle; ChapterURL = URL; ChapterURLorigin = A:ORIGIN('URL'); Title = Series;														-- promote series to title TitleLink = SeriesLink; Series = table.concat(s, sepc .. ' ');								-- this is concatenation of season, seriesno, episode number

if is_set (ChapterLink) and not is_set (ChapterURL) then			-- link but not URL Chapter =  .. Chapter .. ;		-- ok to wikilink elseif is_set (ChapterLink) and is_set (ChapterURL) then			-- if both are set, URL links episode; Series =  .. Series .. ;			-- series links with ChapterLink (episodelink -> TitleLink -> ChapterLink) ugly end URL = '';															-- unset TransTitle = ''; ScriptTitle = ''; else																	-- now oddities that are cite serial Issue = '';															-- unset because this parameter no longer supported by the citation/core version of cite serial Chapter = A['Episode'];												-- TODO: make |episode= available to cite episode someday? if is_set (Series) and is_set (SeriesLink) then Series =  .. Series .. ; end Series = wrap_style ('italic-title', Series);						-- series is italicized end end -- end of stuff

-- Account for the oddities that are, before generation of COinS data. if 'arxiv' == config.CitationClass then if not is_set (ID_list['ARXIV']) then									-- |arxiv= or |eprint= required for cite arxiv table.insert( z.message_tail, { set_error( 'arxiv_missing', {}, true ) } );		-- add error message elseif is_set (Series) then												-- series is an alias of version ID_list['ARXIV'] = ID_list['ARXIV'] .. Series;						-- concatenate version onto the end of the arxiv identifier Series = '';														-- unset deprecated_parameter ('version');									-- deprecated parameter but only for cite arxiv end if first_set ({AccessDate, At, Chapter, Format, Page, Pages, Periodical, PublisherName, URL,	-- a crude list of parameters that are not supported by cite arxiv			ID_list['ASIN'], ID_list['BIBCODE'], ID_list['DOI'], ID_list['ISBN'], ID_list['ISSN'],			ID_list['JFM'], ID_list['JSTOR'], ID_list['LCCN'], ID_list['MR'], ID_list['OCLC'], ID_list['OL'],			ID_list['OSTI'], ID_list['PMC'], ID_list['PMID'], ID_list['RFC'], ID_list['SSRN'], ID_list['USENETID'], ID_list['ZBL']},27) then table.insert( z.message_tail, { set_error( 'arxiv_params_not_supported', {}, true ) } );		-- add error message

AccessDate= '';													-- set these to empty string; not supported in cite arXiv PublisherName = '';												-- (if the article has been published, use cite journal, or other) Chapter = ''; URL = ''; Format = ''; Page = ; Pages = ; At = ''; end Periodical = 'arXiv';													-- set to arXiv for COinS; after that, must be set to empty string end

-- handle type parameter for those CS1 citations that have default values if in_array(config.CitationClass, {"AV-media-notes", "DVD-notes", "mailinglist", "map", "podcast", "pressrelease", "report", "techreport", "thesis"}) then TitleType = set_titletype (config.CitationClass, TitleType); if is_set(Degree) and "Thesis" == TitleType then						-- special case for cite thesis TitleType = Degree .. " thesis"; end end

if is_set(TitleType) then													-- if type parameter is specified TitleType = substitute( cfg.messages['type'], TitleType);					-- display it in parentheses end

-- legacy: promote concatenation of |month=, and |year= to Date if Date not set; or, promote PublicationDate to Date if neither Date nor Year are set. if not is_set (Date) then Date = Year;															-- promote Year to Date Year = nil;																-- make nil so Year as empty string isn't used for CITEREF if not is_set (Date) and is_set(PublicationDate) then					-- use PublicationDate when |date= and |year= are not set Date = PublicationDate;												-- promote PublicationDate to Date PublicationDate = '';												-- unset, no longer needed end end

if PublicationDate == Date then PublicationDate = ''; end					-- if PublicationDate is same as Date, don't display in rendered citation

--[[ Go test all of the date-holding parameters for valid MOS:DATE format and make sure that dates are real dates. This must be done before we do COinS because here is where we get the date used in the metadata.

Date validation supporting code is in Module:Citation/CS1/Date_validation ]]	do	-- create defined block to contain local variables error_message and mismatch local error_message = ''; -- AirDate has been promoted to Date so not necessary to check it		anchor_year, error_message = dates({['access-date']=AccessDate, ['archive-date']=ArchiveDate, ['date']=Date, ['doi-broken-date']=DoiBroken,			['embargo']=Embargo, ['lay-date']=LayDate, ['publication-date']=PublicationDate, ['year']=Year}, COinS_date);

if is_set (Year) and is_set (Date) then									-- both |date= and |year= not normally needed; local mismatch = year_date_check (Year, Date) if 0 == mismatch then												-- |year= does not match a year-value in |date= if is_set (error_message) then									-- if there is already an error message error_message = error_message .. ', ';						-- tack on this additional message end error_message = error_message .. '&#124;year= / &#124;date= mismatch'; elseif 1 == mismatch then											-- |year= matches year-value in |date= add_maint_cat ('date_year'); end end

if is_set(error_message) then table.insert( z.message_tail, { set_error( 'bad_date', {error_message}, true ) } );	-- add this error message end end	-- end of do

-- Account for the oddity that is with |pmc= set and |url= not set. Do this after date check but before COInS. -- Here we unset Embargo if PMC not embargoed (|embargo= not set in the citation) or if the embargo time has expired. Otherwise, holds embargo date Embargo = is_embargoed (Embargo);											--

if config.CitationClass == "journal" and not is_set(URL) and is_set(ID_list['PMC']) then if not is_set (Embargo) then											-- if not embargoed or embargo has expired URL=cfg.id_handlers['PMC'].prefix .. ID_list['PMC'];				-- set url to be the same as the PMC external link if not embargoed URLorigin = cfg.id_handlers['PMC'].parameters[1];					-- set URLorigin to parameter name for use in error message if citation is missing a |title= end end

-- At this point fields may be nil if they weren't specified in the template use. We can use that fact. -- Test if citation has no title if	not is_set(Title) and not is_set(TransTitle) and not is_set(ScriptTitle) then if 'episode' == config.CitationClass then							-- special case for cite episode; TODO: is there a better way to do this? table.insert( z.message_tail, { set_error( 'citation_missing_title', {'series'}, true ) } ); else table.insert( z.message_tail, { set_error( 'citation_missing_title', {'title'}, true ) } ); end end if 'none' == Title and in_array (config.CitationClass, {'journal', 'citation'}) and is_set (Periodical) and 'journal' == A:ORIGIN('Periodical') then	-- special case for journal cites Title = '';																-- set title to empty string add_maint_cat ('untitled'); end

check_for_url ({															-- add error message when any of these parameters contains a URL		['title']=Title,		[A:ORIGIN('Chapter')]=Chapter,		[A:ORIGIN('Periodical')]=Periodical,		[A:ORIGIN('PublisherName')] = PublisherName,		});

-- COinS metadata (see ) for automated parsing of citation information. -- handle the oddity that is cite encyclopedia and. Here we presume that -- when Periodical, Title, and Chapter are all set, then Periodical is the book (encyclopedia) title, Title -- is the article title, and Chapter is a section within the article. So, we remap local coins_chapter = Chapter;												-- default assuming that remapping not required local coins_title = Title;													-- et tu	if 'encyclopaedia' == config.CitationClass or ('citation' == config.CitationClass and is_set (Encyclopedia)) then if is_set (Chapter) and is_set (Title) and is_set (Periodical) then		-- if all are used then coins_chapter = Title;												-- remap coins_title = Periodical; end end local coins_author = a;														-- default for coins rft.au 	if 0 < #c then																-- but if contributor list coins_author = c;														-- use that instead end

-- this is the function call to COinS local OCinSoutput = COinS({		['Periodical'] = Periodical,		['Encyclopedia'] = Encyclopedia,		['Chapter'] = make_coins_title (coins_chapter, ScriptChapter),			-- Chapter and ScriptChapter stripped of bold / italic wikimarkup		['Map'] = Map,		['Degree'] = Degree;													-- cite thesis only		['Title'] = make_coins_title (coins_title, ScriptTitle),				-- Title and ScriptTitle stripped of bold / italic wikimarkup		['PublicationPlace'] = PublicationPlace,		['Date'] = COinS_date.rftdate,											-- COinS_date has correctly formatted date if Date is valid;		['Season'] = COinS_date.rftssn,		['Chron'] = COinS_date.rftchron or (not COinS_date.rftdate and Date) or '',	-- chron but if not set and invalid date format use Date; keep this last bit?		['Series'] = Series,		['Volume'] = Volume,		['Issue'] = Issue,		['Pages'] = get_coins_pages (first_set ({Sheet, Sheets, Page, Pages, At}, 5)),				-- pages stripped of external links ['Edition'] = Edition, ['PublisherName'] = PublisherName, ['URL'] = first_set ({ChapterURL, URL}, 2), ['Authors'] = coins_author, ['ID_list'] = ID_list, ['RawPage'] = this_page.prefixedText, }, config.CitationClass);

-- Account for the oddities that are, AFTER generation of COinS data. if 'arxiv' == config.CitationClass then										-- we have set rft.jtitle in COinS to arXiv, now unset so it isn't displayed Periodical = '';														-- periodical not allowed in cite arxiv; if article has been published, use cite journal end

-- special case for cite newsgroup. Do this after COinS because we are modifying Publishername to include some static text if 'newsgroup' == config.CitationClass then if is_set (PublisherName) then PublisherName = substitute (cfg.messages['newsgroup'], external_link( 'news:' .. PublisherName, PublisherName, A:ORIGIN('PublisherName') )); end end

-- Now perform various field substitutions. -- We also add leading spaces and surrounding markup and punctuation to the -- various parts of the citation, but only when they are non-nil. local EditorCount;															-- used only for choosing {ed.) or (eds.) annotation at end of editor name-list	do		local last_first_list;		local maximum;		local control = { 			format = NameListFormat,											-- empty string or 'vanc'			maximum = nil,														-- as if display-authors or display-editors not set			lastauthoramp = LastAuthorAmp,			page_name = this_page.text											-- get current page name so that we don't wikilink to it via editorlinkn		};

do																		-- do editor name list first because coauthors can modify control table maximum, editor_etal = get_display_authors_editors (A['DisplayEditors'], #e, 'editors', editor_etal); -- Preserve old-style implicit et al.			if not is_set(maximum) and #e == 4 then maximum = 3; table.insert( z.message_tail, { set_error('implict_etal_editor', {}, true) } ); end

control.maximum = maximum; last_first_list, EditorCount = list_people(control, e, editor_etal, 'editor');

if is_set (Editors) then if editor_etal then Editors = Editors .. ' ' .. cfg.messages['et al'];			-- add et al. to editors parameter beause |display-editors=etal EditorCount = 2;											-- with et al., |editors= is multiple names; spoof to display (eds.) annotation else EditorCount = 2;											-- we don't know but assume |editors= is multiple names; spoof to display (eds.) annotation end else Editors = last_first_list;										-- either an author name list or an empty string end

if 1 == EditorCount and (true == editor_etal or 1 < #e) then		-- only one editor displayed but includes etal then EditorCount = 2;												-- spoof to display (eds.) annotation end end do																		-- now do translators control.maximum = #t;												-- number of translators Translators = list_people(control, t, false, 'translator');			-- et al not currently supported end do																		-- now do contributors control.maximum = #c;												-- number of contributors Contributors = list_people(control, c, false, 'contributor');		-- et al not currently supported end do																		-- now do authors control.maximum, author_etal = get_display_authors_editors (A['DisplayAuthors'], #a, 'authors', author_etal);

if is_set(Coauthors) then											-- if the coauthor field is also used, prevent ampersand and et al. formatting. control.lastauthoramp = nil; control.maximum = #a + 1; end last_first_list = list_people(control, a, author_etal, 'author');

if is_set (Authors) then Authors, author_etal = name_has_etal (Authors, author_etal, false);	-- find and remove variations on et al.				if author_etal then Authors = Authors .. ' ' .. cfg.messages['et al'];			-- add et al. to authors parameter end else Authors = last_first_list;										-- either an author name list or an empty string end end																		-- end of do

if not is_set(Authors) and is_set(Coauthors) then						-- coauthors aren't displayed if one of authors=, authorn=, or lastn= isn't specified table.insert( z.message_tail, { set_error('coauthors_missing_author', {}, true) } );	-- emit error message end end

-- apply |[xx-]format= styling; at the end, these parameters hold correctly styled format annotation, -- an error message if the associated url is not set, or an empty string for concatenation ArchiveFormat = style_format (ArchiveFormat, ArchiveURL, 'archive-format', 'archive-url'); ConferenceFormat = style_format (ConferenceFormat, ConferenceURL, 'conference-format', 'conference-url'); Format = style_format (Format, URL, 'format', 'url'); LayFormat = style_format (LayFormat, LayURL, 'lay-format', 'lay-url'); TranscriptFormat = style_format (TranscriptFormat, TranscriptURL, 'transcript-format', 'transcripturl');

-- special case for chapter format so no error message or cat when chapter not supported if not (in_array(config.CitationClass, {'web','news','journal', 'magazine', 'pressrelease','podcast', 'newsgroup', 'arxiv'}) or		('citation' == config.CitationClass and is_set (Periodical) and not is_set (Encyclopedia))) then ChapterFormat = style_format (ChapterFormat, ChapterURL, 'chapter-format', 'chapter-url'); end

if not is_set(URL) then --and if in_array(config.CitationClass, {"web","podcast", "mailinglist"}) then		-- Test if cite web or cite podcast |url= is missing or empty table.insert( z.message_tail, { set_error( 'cite_web_url', {}, true ) } ); end -- Test if accessdate is given without giving a URL if is_set(AccessDate) and not is_set(ChapterURL)then					-- ChapterURL may be set when the others are not set; TODO: move this to a separate test? table.insert( z.message_tail, { set_error( 'accessdate_missing_url', {}, true ) } ); AccessDate = ''; end end

local OriginalURL, OriginalURLorigin, OriginalFormat;						-- TODO: swap chapter and title here so that archive applies to most specific if both are set? DeadURL = DeadURL:lower;													-- used later when assembling archived text if is_set( ArchiveURL ) then if is_set (URL) then OriginalURL = URL;													-- save copy of original source URL OriginalURLorigin = URLorigin;										-- name of url parameter for error messages OriginalFormat = Format;											-- and original |format= if 'no' ~= DeadURL then												-- if URL set then archive-url applies to it				URL = ArchiveURL												-- swap-in the archive's url URLorigin = A:ORIGIN('ArchiveURL')								-- name of archive url parameter for error messages Format = ArchiveFormat or '';									-- swap in archive's format end elseif is_set (ChapterURL) then 										-- URL not set so if chapter-url is set apply archive url to it			OriginalURL = ChapterURL;											-- save copy of source chapter's url for archive text OriginalURLorigin = ChapterURLorigin;								-- name of chapter-url parameter for error messages OriginalFormat = ChapterFormat;										-- and original |format= if 'no' ~= DeadURL then ChapterURL = ArchiveURL											-- swap-in the archive's url ChapterURLorigin = A:ORIGIN('ArchiveURL')						-- name of archive-url parameter for error messages ChapterFormat = ArchiveFormat or '';							-- swap in archive's format end end end

if in_array(config.CitationClass, {'web','news','journal', 'magazine', 'pressrelease','podcast', 'newsgroup', 'arxiv'}) or	-- if any of the 'periodical' cites except encyclopedia ('citation' == config.CitationClass and is_set (Periodical) and not is_set (Encyclopedia)) then local chap_param; if is_set (Chapter) then											-- get a parameter name from one of these chapter related meta-parameters chap_param = A:ORIGIN ('Chapter') elseif is_set (TransChapter) then chap_param = A:ORIGIN ('TransChapter') elseif is_set (ChapterURL) then chap_param = A:ORIGIN ('ChapterURL') elseif is_set (ScriptChapter) then chap_param = A:ORIGIN ('ScriptChapter') else is_set (ChapterFormat) chap_param = A:ORIGIN ('ChapterFormat') end

if is_set (chap_param) then											-- if we found one table.insert( z.message_tail, { set_error( 'chapter_ignored', {chap_param}, true ) } );		-- add error message Chapter = '';													-- and set them to empty string to be safe with concatenation TransChapter = ''; ChapterURL = ''; ScriptChapter = ''; ChapterFormat = ''; end else																		-- otherwise, format chapter / article title local no_quotes = false;												-- default assume that we will be quoting the chapter parameter value if is_set (Contribution) and 0 < #c then								-- if this is a contribution with contributor(s) if in_array (Contribution:lower, cfg.keywords.contribution) then	-- and a generic contribution title no_quotes = true;												-- then render it unquoted end end

Chapter = format_chapter_title (ScriptChapter, Chapter, TransChapter, ChapterURL, ChapterURLorigin, no_quotes);		-- Contribution is also in Chapter if is_set (Chapter) then if 'map' == config.CitationClass and is_set (TitleType) then Chapter = Chapter .. ' ' .. TitleType; end Chapter = Chapter .. ChapterFormat .. sepc .. ' ';		elseif is_set (ChapterFormat) then										-- |chapter= not set but |chapter-format= is so ... Chapter = ChapterFormat .. sepc .. ' ';								-- ... ChapterFormat has error message, we want to see it		end end

-- Format main title. if is_set(TitleLink) and is_set(Title) then Title = "" .. Title .. "" end

if in_array(config.CitationClass, {'web','news','journal', 'magazine', 'pressrelease','podcast', 'newsgroup', 'mailinglist', 'arxiv'}) or		('citation' == config.CitationClass and is_set (Periodical) and not is_set (Encyclopedia)) or		('map' == config.CitationClass and is_set (Periodical)) then			-- special case for cite map when the map is in a periodical treat as an article Title = kern_quotes (Title);										-- if necessary, separate title's leading and trailing quote marks from Module provided quote marks Title = wrap_style ('quoted-title', Title); Title = script_concatenate (Title, ScriptTitle);					-- tags, lang atribute, categorization, etc; must be done after title is wrapped TransTitle= wrap_style ('trans-quoted-title', TransTitle ); elseif 'report' == config.CitationClass then								-- no styling for cite report Title = script_concatenate (Title, ScriptTitle);						-- tags, lang atribute, categorization, etc; must be done after title is wrapped TransTitle= wrap_style ('trans-quoted-title', TransTitle );				-- for cite report, use this form for trans-title else Title = wrap_style ('italic-title', Title); Title = script_concatenate (Title, ScriptTitle);						-- tags, lang atribute, categorization, etc; must be done after title is wrapped TransTitle = wrap_style ('trans-italic-title', TransTitle); end

TransError = ""; if is_set(TransTitle) then if is_set(Title) then TransTitle = " " .. TransTitle; else TransError = " " .. set_error( 'trans_missing_title', {'title'} ); end end Title = Title .. TransTitle; if is_set(Title) then if not is_set(TitleLink) and is_set(URL) then Title = external_link( URL, Title, URLorigin ) .. TransError .. Format; URL = ""; Format = ""; else Title = Title .. TransError; end end

if is_set(Place) then Place = " " .. wrap_msg ('written', Place, use_lowercase) .. sepc .. " ";	end

if is_set (Conference) then if is_set (ConferenceURL) then Conference = external_link( ConferenceURL, Conference, ConferenceURLorigin ); end Conference = sepc .. " " .. Conference .. ConferenceFormat; elseif is_set(ConferenceURL) then Conference = sepc .. " " .. external_link( ConferenceURL, nil, ConferenceURLorigin ); end

if not is_set(Position) then local Minutes = A['Minutes']; local Time = A['Time'];

if is_set(Minutes) then if is_set (Time) then table.insert( z.message_tail, { set_error( 'redundant_parameters', {wrap_style ('parameter', 'minutes') .. ' and ' .. wrap_style ('parameter', 'time')}, true ) } ); end Position = " " .. Minutes .. " " .. cfg.messages['minutes']; else if is_set(Time) then local TimeCaption = A['TimeCaption'] if not is_set(TimeCaption) then TimeCaption = cfg.messages['event']; if sepc ~= '.' then TimeCaption = TimeCaption:lower; end end Position = " " .. TimeCaption .. " " .. Time; end end else Position = " " .. Position; At = ''; end

Page, Pages, Sheet, Sheets = format_pages_sheets (Page, Pages, Sheet, Sheets, config.CitationClass, Periodical_origin, sepc, NoPP, use_lowercase);

At = is_set(At) and (sepc .. " " .. At) or ""; Position = is_set(Position) and (sepc .. " " .. Position) or ""; if config.CitationClass == 'map' then local Section = A['Section']; local Sections = A['Sections']; local Inset = A['Inset']; if is_set( Inset ) then Inset = sepc .. " " .. wrap_msg ('inset', Inset, use_lowercase); end

if is_set( Sections ) then Section = sepc .. " " .. wrap_msg ('sections', Sections, use_lowercase); elseif is_set( Section ) then Section = sepc .. " " .. wrap_msg ('section', Section, use_lowercase); end At = At .. Inset .. Section; end

if is_set (Language) then Language = language_parameter (Language);								-- format, categories, name from ISO639-1, etc else Language="";															-- language not specified so make sure this is an empty string; end

Others = is_set(Others) and (sepc .. " " .. Others) or ""; if is_set (Translators) then Others = sepc .. ' Translated by ' .. Translators .. Others; end

TitleNote = is_set(TitleNote) and (sepc .. " " .. TitleNote) or ""; if is_set (Edition) then if Edition:match ('%f[%a][Ee]d%.?$') or Edition:match ('%f[%a][Ee]dition$') then add_maint_cat ('extra_text', 'edition'); end Edition = " " .. wrap_msg ('edition', Edition); else Edition = ''; end

Series = is_set(Series) and (sepc .. " " .. Series) or ""; OrigYear = is_set(OrigYear) and (" [" .. OrigYear .. "]") or ""; Agency = is_set(Agency) and (sepc .. " " .. Agency) or "";

Volume = format_volume_issue (Volume, Issue, config.CitationClass, Periodical_origin, sepc, use_lowercase);

totally unrelated data if is_set(Via) then Via = " " .. wrap_msg ('via', Via); end

--[[ Subscription implies paywall; Registration does not. If both are used in a citation, the subscription required link note is displayed. There are no error messages for this condition.

]]	if is_set (SubscriptionRequired) then SubscriptionRequired = sepc .. " " .. cfg.messages['subscription'];		-- subscription required message elseif is_set (RegistrationRequired) then SubscriptionRequired = sepc .. " " .. cfg.messages['registration'];		-- registration required message else SubscriptionRequired = '';												-- either or both might be set to something other than yes true y	end

if is_set(AccessDate) then local retrv_text = " " .. cfg.messages['retrieved']

AccessDate = nowrap_date (AccessDate);									-- wrap in nowrap span if date in appropriate format if (sepc ~= ".") then retrv_text = retrv_text:lower end				-- if 'citation', lower case AccessDate = substitute (retrv_text, AccessDate);						-- add retrieved text -- neither of these work; don't know why; it seems that substitute isn't being called AccessDate = substitute (cfg.presentation['accessdate'], {sepc, AccessDate});	-- allow editors to hide accessdates end if is_set(ID) then ID = sepc .." ".. ID; end if "thesis" == config.CitationClass and is_set(Docket) then ID = sepc .." Docket ".. Docket .. ID; end if "report" == config.CitationClass and is_set(Docket) then					-- for cite report when |docket= is set ID = sepc .. ' ' .. Docket;												-- overwrite ID even if |id= is set end

ID_list = build_id_list( ID_list, {DoiBroken = DoiBroken, ASINTLD = ASINTLD, IgnoreISBN = IgnoreISBN, Embargo=Embargo, Class = Class} );

if is_set(URL) then URL = " " .. external_link( URL, nil, URLorigin ); end

if is_set(Quote) then if Quote:sub(1,1) == '"' and Quote:sub(-1,-1) == '"' then				-- if first and last characters of quote are quote marks Quote = Quote:sub(2,-2);											-- strip them off end Quote = sepc .." " .. wrap_style ('quoted-text', Quote ); 				-- wrap in ... tags PostScript = "";														-- cs1|2 does not supply terminal punctuation when |quote= is set end local Archived if is_set(ArchiveURL) then if not is_set(ArchiveDate) then ArchiveDate = set_error('archive_missing_date'); end if "no" == DeadURL then local arch_text = cfg.messages['archived']; if sepc ~= "." then arch_text = arch_text:lower end Archived = sepc .. " " .. substitute( cfg.messages['archived-not-dead'],				{ external_link( ArchiveURL, arch_text, A:ORIGIN('ArchiveURL') ) .. ArchiveFormat, ArchiveDate } ); if not is_set(OriginalURL) then Archived = Archived .. " " .. set_error('archive_missing_url'); end elseif is_set(OriginalURL) then											-- DeadURL is empty, 'yes', 'true', 'y', 'unfit', 'usurped' local arch_text = cfg.messages['archived-dead']; if sepc ~= "." then arch_text = arch_text:lower end if in_array (DeadURL, {'unfit', 'usurped'}) then Archived = sepc .. " " .. 'Archived from the original on ' .. ArchiveDate;	-- format already styled else																-- DeadURL is empty, 'yes', 'true', or 'y' Archived = sepc .. " " .. substitute( arch_text,					{ external_link( OriginalURL, cfg.messages['original'], OriginalURLorigin ) .. OriginalFormat, ArchiveDate } );	-- format already styled end else local arch_text = cfg.messages['archived-missing']; if sepc ~= "." then arch_text = arch_text:lower end Archived = sepc .. " " .. substitute( arch_text, 				{ set_error('archive_missing_url'), ArchiveDate } ); end elseif is_set (ArchiveFormat) then Archived = ArchiveFormat;												-- if set and ArchiveURL not set ArchiveFormat has error message else Archived = "" end local Lay = ''; if is_set(LayURL) then if is_set(LayDate) then LayDate = " (" .. LayDate .. ")" end if is_set(LaySource) then LaySource = " – ''" .. safe_for_italics(LaySource) .. "''";		else LaySource = ""; end if sepc == '.' then Lay = sepc .. " " .. external_link( LayURL, cfg.messages['lay summary'], A:ORIGIN('LayURL') ) .. LayFormat .. LaySource .. LayDate else Lay = sepc .. " " .. external_link( LayURL, cfg.messages['lay summary']:lower, A:ORIGIN('LayURL') ) .. LayFormat .. LaySource .. LayDate end elseif is_set (LayFormat) then												-- Test if |lay-format= is given without giving a |lay-url= Lay = sepc .. LayFormat;												-- if set and LayURL not set, then LayFormat has error message end

if is_set(Transcript) then if is_set(TranscriptURL) then Transcript = external_link( TranscriptURL, Transcript, TranscriptURLorigin ); end Transcript = sepc .. ' ' .. Transcript .. TranscriptFormat; elseif is_set(TranscriptURL) then Transcript = external_link( TranscriptURL, nil, TranscriptURLorigin ); end

local Publisher; if is_set(Periodical) and not in_array(config.CitationClass, {"encyclopaedia","web","pressrelease","podcast"}) then if is_set(PublisherName) then if is_set(PublicationPlace) then Publisher = PublicationPlace .. ": " .. PublisherName; else Publisher = PublisherName; end elseif is_set(PublicationPlace) then Publisher= PublicationPlace; else Publisher = ""; end if is_set(PublicationDate) then if is_set(Publisher) then Publisher = Publisher .. ", " .. wrap_msg ('published', PublicationDate); else Publisher = PublicationDate; end end if is_set(Publisher) then Publisher = " (" .. Publisher .. ")"; end else if is_set(PublicationDate) then PublicationDate = " (" .. wrap_msg ('published', PublicationDate) .. ")"; end if is_set(PublisherName) then if is_set(PublicationPlace) then Publisher = sepc .. " " .. PublicationPlace .. ": " .. PublisherName .. PublicationDate; else Publisher = sepc .. " " .. PublisherName .. PublicationDate; end elseif is_set(PublicationPlace) then Publisher= sepc .. " " .. PublicationPlace .. PublicationDate; else Publisher = PublicationDate; end end -- Several of the above rely upon detecting this as nil, so do it last. if is_set(Periodical) then if is_set(Title) or is_set(TitleNote) then Periodical = sepc .. " " .. wrap_style ('italic-title', Periodical) else Periodical = wrap_style ('italic-title', Periodical) end end

--department=) and forces it to be " (Speech)" so that the annotation directly follows the |title= parameter value in the citation rather than the |event= parameter value (if provided). if "speech" == config.CitationClass then				-- cite speech only TitleNote = " (Speech)";							-- annotate the citation if is_set (Periodical) then							-- if Periodical, perhaps because of an included |website= or |journal= parameter if is_set (Conference) then						-- and if |event= is set Conference = Conference .. sepc .. " ";		-- then add appropriate punctuation to the end of the Conference variable before rendering end end end

-- Piece all bits together at last. Here, all should be non-nil. -- We build things this way because it is more efficient in LUA -- not to keep reassigning to the same string variable over and over.

local tcommon; local tcommon2;																-- used for book cite when |contributor= is set if in_array(config.CitationClass, {"journal","citation"}) and is_set(Periodical) then if is_set(Others) then Others = Others .. sepc .. " " end tcommon = safe_join( {Others, Title, TitleNote, Conference, Periodical, Format, TitleType, Series, 			Language, Edition, Publisher, Agency, Volume}, sepc ); elseif in_array(config.CitationClass, {"book","citation"}) and not is_set(Periodical) then		-- special cases for book cites if is_set (Contributors) then											-- when we are citing foreword, preface, introduction, etc tcommon = safe_join( {Title, TitleNote}, sepc );					-- author and other stuff will come after this and before tcommon2 tcommon2 = safe_join( {Conference, Periodical, Format, TitleType, Series, Language, Volume, Others, Edition, Publisher, Agency}, sepc ); else tcommon = safe_join( {Title, TitleNote, Conference, Periodical, Format, TitleType, Series, Language, Volume, Others, Edition, Publisher, Agency}, sepc ); end

elseif 'map' == config.CitationClass then									-- special cases for cite map if is_set (Chapter) then												-- map in a book; TitleType is part of Chapter tcommon = safe_join( {Title, Format, Edition, Scale, Series, Language, Cartography, Others, Publisher, Volume}, sepc ); elseif is_set (Periodical) then											-- map in a periodical tcommon = safe_join( {Title, TitleType, Format, Periodical, Scale, Series, Language, Cartography, Others, Publisher, Volume}, sepc ); else																	-- a sheet or stand-alone map tcommon = safe_join( {Title, TitleType, Format, Edition, Scale, Series, Language, Cartography, Others, Publisher}, sepc ); end elseif 'episode' == config.CitationClass then								-- special case for cite episode tcommon = safe_join( {Title, TitleNote, TitleType, Series, Transcript, Language, Edition, Publisher}, sepc ); else																		-- all other CS1 templates tcommon = safe_join( {Title, TitleNote, Conference, Periodical, Format, TitleType, Series, Language, 			Volume, Others, Edition, Publisher, Agency}, sepc ); end if #ID_list > 0 then ID_list = safe_join( { sepc .. " ", table.concat( ID_list, sepc .. " " ), ID }, sepc ); else ID_list = ID; end local idcommon = safe_join( { ID_list, URL, Archived, AccessDate, Via, SubscriptionRequired, Lay, Quote }, sepc ); local text; local pgtext = Position .. Sheet .. Sheets .. Page .. Pages .. At;

if is_set(Date) then if is_set (Authors) or is_set (Editors) then							-- date follows authors or editors when authors not set Date = " (" .. Date ..")" .. OrigYear .. sepc .. " ";				-- in paranetheses else																	-- neither of authors and editors set if (string.sub(tcommon,-1,-1) == sepc) then							-- if the last character of tcommon is sepc Date = " " .. Date .. OrigYear;									-- Date does not begin with sepc else Date = sepc .. " " .. Date .. OrigYear;							-- Date begins with sepc end end end if is_set(Authors) then if is_set(Coauthors) then if 'vanc' == NameListFormat then									-- separate authors and coauthors with proper name-list-separator Authors = Authors .. ', ' .. Coauthors; else Authors = Authors .. '; ' .. Coauthors; end end if not is_set (Date) then												-- when date is set it's in parentheses; no Authors termination Authors = terminate_name_list (Authors, sepc);						-- when no date, terminate with 0 or 1 sepc and a space end if is_set(Editors) then local in_text = " "; local post_text = ""; if is_set(Chapter) and 0 == #c then in_text = in_text .. cfg.messages['in'] .. " "				if (sepc ~= '.') then in_text = in_text:lower end				-- lowercase for cs2 else if EditorCount <= 1 then post_text = ", " .. cfg.messages['editor']; else post_text = ", " .. cfg.messages['editors']; end end Editors = terminate_name_list (in_text .. Editors .. post_text, sepc);	-- terminate with 0 or 1 sepc and a space end if is_set (Contributors) then											-- book cite and we're citing the intro, preface, etc local by_text = sepc .. ' ' .. cfg.messages['by'] .. ' ';			if (sepc ~= '.') then by_text = by_text:lower end					-- lowercase for cs2 Authors = by_text .. Authors;										-- author follows title so tweak it here if is_set (Editors) then											-- when Editors make sure that Authors gets terminated Authors = terminate_name_list (Authors, sepc);					-- terminate with 0 or 1 sepc and a space end if not is_set (Date) then											-- when date is set it's in parentheses; no Contributors termination Contributors = terminate_name_list (Contributors, sepc);		-- terminate with 0 or 1 sepc and a space end text = safe_join( {Contributors, Date, Chapter, tcommon, Authors, Place, Editors, tcommon2, pgtext, idcommon }, sepc ); else text = safe_join( {Authors, Date, Chapter, Place, Editors, tcommon, pgtext, idcommon }, sepc ); end elseif is_set(Editors) then if is_set(Date) then if EditorCount <= 1 then Editors = Editors .. ", " .. cfg.messages['editor']; else Editors = Editors .. ", " .. cfg.messages['editors']; end else if EditorCount <= 1 then Editors = Editors .. " (" .. cfg.messages['editor'] .. ")" .. sepc .. " "			else Editors = Editors .. " (" .. cfg.messages['editors'] .. ")" .. sepc .. " "			end end text = safe_join( {Editors, Date, Chapter, Place, tcommon, pgtext, idcommon}, sepc ); else if config.CitationClass=="journal" and is_set(Periodical) then text = safe_join( {Chapter, Place, tcommon, pgtext, Date, idcommon}, sepc ); else text = safe_join( {Chapter, Place, tcommon, Date, pgtext, idcommon}, sepc ); end end if is_set(PostScript) and PostScript ~= sepc then text = safe_join( {text, sepc}, sepc ); --Deals with italics, spaces, etc.		text = text:sub(1,-sepc:len-1); end text = safe_join( {text, PostScript}, sepc );

-- Now enclose the whole thing in a element local options = {}; if is_set(config.CitationClass) and config.CitationClass ~= "citation" then options.class = config.CitationClass; options.class = "citation " .. config.CitationClass;					-- class=citation required for blue highlight when used with |ref= else options.class = "citation"; end if is_set(Ref) and Ref:lower ~= "none" then								-- set reference anchor if appropriate local id = Ref if ('harv' == Ref ) then local namelist = {};												-- holds selected contributor, author, editor name list --			local year = first_set (Year, anchor_year);							-- Year first for legacy citations and for YMD dates that require disambiguation local year = first_set ({Year, anchor_year}, 2);					-- Year first for legacy citations and for YMD dates that require disambiguation

if #c > 0 then														-- if there is a contributor list namelist = c;													-- select it			elseif #a > 0 then													-- or an author list namelist = a;			elseif #e > 0 then													-- or an editor list namelist = e;			end id = anchor_id (namelist, year);									-- go make the CITEREF anchor end options.id = id; end if string.len(text:gsub("/]*>.- ", ""):gsub("%b<>","")) <= 2 then z.error_categories = {}; text = set_error('empty_citation'); z.message_tail = {}; end if is_set(options.id) then text = '' .. text .. " ";	else text = '' .. text .. " ";	end

local empty_span = ' '; -- Note: Using display: none on the COinS span breaks some clients. local OCinS = ' ' .. empty_span .. ' ';	text = text .. OCinS; if #z.message_tail ~= 0 then text = text .. " ";		for i,v in ipairs( z.message_tail ) do			if is_set(v[1]) then if i == #z.message_tail then text = text .. error_comment( v[1], v[2] ); else text = text .. error_comment( v[1] .. "; ", v[2] ); end end end end

if #z.maintenance_cats ~= 0 then text = text .. ' ';		for _, v in ipairs( z.maintenance_cats ) do								-- append maintenance categories text = text .. ' ' .. v .. ' (link)'; end text = text .. ' ';	-- maintenance mesages (realy just the names of the categories for now) end no_tracking_cats = no_tracking_cats:lower; if in_array(no_tracking_cats, {"", "no", "false", "n"}) then for _, v in ipairs( z.error_categories ) do text = text .. '';		end for _, v in ipairs( z.maintenance_cats ) do								-- append maintenance categories text = text .. '';		end for _, v in ipairs( z.properties_cats ) do								-- append maintenance categories text = text .. '';		end end return text end

--[[--< H A S _ I N V I S I B L E _ C H A R S >

This function searches a parameter's value for nonprintable or invisible characters. The search stops at the first match.

Sometime after this module is done with rendering a citation, some C0 control characters are replaced with the replacement character. That replacement character is not detected by this test though it is visible to readers of the rendered citation. This function will detect the replacement character when it is part of the wikisource.

Output of this function is an error message that identifies the character or the Unicode group that the character belongs to along with its position in the parameter value.

]] --[[ local function has_invisible_chars (param, v)	local position = ''; local i=1;

while cfg.invisible_chars[i] do		local char=cfg.invisible_chars[i][1]									-- the character or group name local pattern=cfg.invisible_chars[i][2]									-- the pattern used to find it		v = mw.text.unstripNoWiki( v );											-- remove nowiki stripmarkers position = mw.ustring.find (v, pattern)									-- see if the parameter value contains characters that match the pattern if position then table.insert( z.message_tail, { set_error( 'invisible_char', {char, wrap_style ('parameter', param), position}, true ) } );	-- add error message return;																-- and done with this parameter end i=i+1;																	-- bump our index end end ]]

--[[--< Z . C I T A T I O N >--

This is used by templates such as to create the actual citation text.

]]

function z.citation(frame) local pframe = frame:getParent local validation; if nil ~= string.find (frame:getTitle, 'sandbox', 1, true) then			-- did the use sandbox version? cfg = mw.loadData ('Module:Citation/CS1/Configuration/sandbox');		-- load sandbox versions of Configuration and Whitelist and ... whitelist = mw.loadData ('Module:Citation/CS1/Whitelist/sandbox'); validation = require ('Module:Citation/CS1/Date_validation/sandbox');	-- ... sandbox version of date validation code

else																		-- otherwise cfg = mw.loadData ('Module:Citation/CS1/Configuration');				-- load live versions of Configuration and Whitelist and ... whitelist = mw.loadData ('Module:Citation/CS1/Whitelist'); validation = require ('Module:Citation/CS1/Date_validation');			-- ... live version of date validation code end

dates = validation.dates;													-- imported functions year_date_check = validation.year_date_check;

local args = {}; local suggestions = {}; local error_text, error_state;

local config = {}; for k, v in pairs( frame.args ) do		config[k] = v;		args[k] = v; end

local capture;																-- the single supported capture when matching unknown parameters using patterns for k, v in pairs( pframe.args ) do		if v ~= '' then if not validate( k ) then error_text = ""; if type( k ) ~= 'string' then -- Exclude empty numbered parameters if v:match("%S+") ~= nil then error_text, error_state = set_error( 'text_ignored', {v}, true ); end elseif validate( k:lower ) then error_text, error_state = set_error( 'parameter_ignored_suggest', {k, k:lower}, true ); else if nil == suggestions.suggestions then						-- if this table is nil then we need to load it if nil ~= string.find (frame:getTitle, 'sandbox', 1, true) then			-- did the use sandbox version? suggestions = mw.loadData( 'Module:Citation/CS1/Suggestions/sandbox' );	-- use the sandbox version else suggestions = mw.loadData( 'Module:Citation/CS1/Suggestions' );			-- use the live version end end for pattern, param in pairs (suggestions.patterns) do		-- loop through the patterns to see if we can suggest a proper parameter capture = k:match (pattern);							-- the whole match if no caputre in pattern else the capture if a match if capture then											-- if the pattern matches param = substitute( param, capture );				-- add the capture to the suggested parameter (typically the enumerator) error_text, error_state = set_error( 'parameter_ignored_suggest', {k, param}, true );	-- set the error message end end if not is_set (error_text) then								-- couldn't match with a pattern, is there an expicit suggestion? if suggestions.suggestions[ k:lower ] ~= nil then error_text, error_state = set_error( 'parameter_ignored_suggest', {k, suggestions.suggestions[ k:lower ]}, true ); else error_text, error_state = set_error( 'parameter_ignored', {k}, true ); end end end if error_text ~= '' then table.insert( z.message_tail, {error_text, error_state} ); end end args[k] = v;		elseif args[k] ~= nil or (k == 'postscript') then args[k] = v;		end end

for k, v in pairs( args ) do		if 'string' == type (k) then											-- don't evaluate positional parameters has_invisible_chars (k, v); end end return citation0( config, args) end

return z