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 = {};			-- talbe 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 >

First set variable or nil if none

]]

local function first_set(...) local list = {...}; for _, var in pairs(list) do		if is_set( var ) then return var; end 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.

]]

local function add_maint_cat (key, arguments) table.insert( z.maintenance_cats, substitute (cfg.maint_cats [key], arguments));	-- make name then add to table 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 function add_prop_cat (key, arguments) table.insert( z.properties_cats, substitute (cfg.prop_cats [key], arguments));		-- make name then add to table end

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

Determines whether a URL string is valid.

At present the only check is whether the string appears to be prefixed with a URI scheme. It is not determined whether the URI scheme is valid or whether the URL is otherwise well formed.

]]

local function check_url( url_str ) return url_str:sub(1,2) == "//" or url_str:match( "^[^/]*:" ) ~= nil;		-- Protocol-relative or URL scheme 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', {}, 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

--month=, details of which parameter caused the error message are not provided. Only one error message is emitted regardless of the number of deprecated parameters in the citation.  local function deprecated_parameter(name)	if true ~= Page_in_deprecated_cat then	-- if we haven't been here before then set a 		Page_in_deprecated_cat=true;		-- sticky flag so that if there are more than one deprecated parameter the category is added only once		table.insert( z.message_tail, { set_error( 'deprecated_params', {name}, true ) } );		-- add error message	end end
 * coauthor=, and |coauthors=) aren't related to each other and because these parameters may be concatenated into the variables used by |date= and |author#= (and aliases)

--[[--< 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.

At this writing, only |script-title= is supported. It is anticipated that additional parameters will be created to use this function.

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', 'hy', 'ja', 'ka', 'ko', 'ku', 'he', 'ps', 'ru', 'sd', 'sr', 'th', 'uk', 'ug', 'yi', 'zh'}) then add_prop_cat ('script_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 str = substitute( msg, {str} );											-- including template text return str; else return substitute( cfg.messages[key], {str} ); end end

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

Chooses one matching parameter from a list of parameters to consider Generates an error if more than one match is present.

]]

local function select_one( args, possible, error_condition, index ) local value = nil; local selected = ''; local error_list = {}; if index ~= nil then index = tostring(index); end -- Handle special case of "#" replaced by empty string if index == '1' then for _, v in ipairs( possible ) do			v = v:gsub( "#", "" ); if is_set(args[v]) then if value ~= nil and selected ~= v then table.insert( error_list, v ); else value = args[v]; selected = v;				end end end end for _, v in ipairs( possible ) do		if index ~= nil then v = v:gsub( "#", index ); end if is_set(args[v]) then if value ~= nil and selected ~= v then table.insert( error_list, v ); else value = args[v]; selected = v;			end end end if #error_list > 0 then 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 three chapter parameters: |chapter=, |trans-chapter=, and |chapter-url= into a single Chapter meta- parameter (chapter_url_source used for error messages).

]]

local function format_chapter_title (chapter, transchapter, chapterurl, chapter_url_source) local chapter_error = ''; if not is_set (chapter) then chapter = '';															-- just to be safe for concatenation if is_set (transchapter) then chapter = wrap_style ('trans-quoted-title', transchapter); chapter_error = " " .. set_error ('trans_missing_chapter'); 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; else																		-- here when chapter is set 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); if is_set (transchapter) then transchapter = wrap_style ('trans-quoted-title', transchapter); chapter = chapter .. ' ' .. transchapter; end if is_set (chapterurl) then chapter = external_link (chapterurl, chapter);						-- adds bare_url_missing_title error if appropriate end end return chapter; end

-- 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

--[[ 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

--[[--< 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 isbn_str = { isbn_str:byte(1, len) }; for i, v in ipairs( isbn_str ) do			temp = temp + (3 - 2*(i % 2)) * tonumber( string.char(v) ); end return temp % 10 == 0; end 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="//www.amazon."..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

-- 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="http://openlibrary.org/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="http://openlibrary.org/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= "http://openlibrary.org/works/OL",id=id, separator=handler.separator,			encode = handler.encode}) else return external_link_id({link=handler.link, label=handler.label,			prefix= "http://openlibrary.org/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 past 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 if true ~= Page_in_vanc_error_cat then									-- if we haven't been here before then set a sticky flag Page_in_vanc_error_cat=true;										-- so that if there are more than one error the category is added only once table.insert( z.message_tail, { set_error( 'vancouver', {}, true ) } ); end 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) 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 is_good_vanc_name (one, first) then					-- and name is all Latin characters 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

if is_set(person.link) and ((nil ~= person.link:find("//")) or (nil ~= person.link:find("[%[%]]"))) then one = one .. " " .. set_error( 'bad_authorlink' ) end	-- url or wikilink in author link; end table.insert( text, one ) table.insert( text, sep_one ) end end

local count = #text / 2; if count > 0 then if count > 1 and is_set(lastauthoramp) and not etal then text[#text-2] = " & "; end text[#text] = nil; end local result = table.concat(text) -- construct list if etal then local etal_text = cfg.messages['et al']; result = result .. " " .. etal_text; 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.

]]

local function anchor_id( options ) local id = table.concat( options );											-- 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

--[[--< 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 pattern = ",? *'*[Ee][Tt] *[Aa][Ll][%.']*$"							-- variations on the 'et al' theme 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 );

local name = tostring(last); if name:match (pattern) then											-- varients on et al.			last = name:gsub (pattern, '');										-- if found, remove etal = true; end name = tostring(first); if name:match (pattern) then											-- varients on et al.			first = name:gsub (pattern, '');									-- if found, remove etal = true; end

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 names[n] = {last = last, first = first, link = link, mask = mask};	-- add this name to our names list 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 if true == etal then add_maint_cat ('etal'); end return names, etal;															-- all done, return our list of names end

-- Populates ID table from arguments using configuration settings local function extract_ids( args ) local id_list = {}; for k, v in pairs( cfg.id_handlers ) do v = select_one( args, v.parameters, 'redundant_parameters' ); if is_set(v) then id_list[k] = v; end end return id_list; end

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

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

]]

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		-- 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' 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 == '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

-- 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 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 is_set(data.Chapter) then OCinSoutput.rft_val_fmt = "info:ofi/fmt:kev:mtx:book"; OCinSoutput["rft.genre"] = "bookitem"; OCinSoutput["rft.atitle"] = data.Chapter; OCinSoutput["rft.btitle"] = data.Title; elseif is_set(data.Periodical) then OCinSoutput.rft_val_fmt = "info:ofi/fmt:kev:mtx:journal"; if 'arxiv' == class then OCinSoutput["rft.genre"] = "preprint";								-- cite arxiv else OCinSoutput["rft.genre"] = "article"; end OCinSoutput["rft.jtitle"] = data.Periodical; OCinSoutput["rft.atitle"] = data.Title; else OCinSoutput.rft_val_fmt = "info:ofi/fmt:kev:mtx:book"; OCinSoutput["rft.genre"] = "book" OCinSoutput["rft.btitle"] = data.Title; end OCinSoutput["rft.place"] = data.PublicationPlace; OCinSoutput["rft.date"] = data.Date; OCinSoutput["rft.series"] = data.Series; OCinSoutput["rft.volume"] = data.Volume; OCinSoutput["rft.issue"] = data.Issue; OCinSoutput["rft.pages"] = data.Pages; OCinSoutput["rft.edition"] = data.Edition; OCinSoutput["rft.pub"] = data.PublisherName; for k, v in pairs( data.ID_list ) do		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 = v.last, v.first; if k == 1 then if is_set(last) then OCinSoutput["rft.aulast"] = last; end if is_set(first) then OCinSoutput["rft.aufirst"] = first; end end if is_set(last) and is_set(first) then OCinSoutput["rft.au"] = table.concat{ last, ", ", first }; elseif is_set(last) then OCinSoutput["rft.au"] = last; 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, namespace) 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= local unrec_cat = false														-- flag so that we only add unrecognized category once 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 0 == namespace and (('en' == lang:lower) or ('english' == lang:lower)) then add_maint_cat ('english'); 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 0 == namespace and 'en' ~= code then								-- is this page main / article space and English not the language? add_prop_cat ('foreign_lang_source', {name, code}) end elseif false == unrec_cat then unrec_cat = true;													-- only add this category once add_maint_cat (unknown_lang); 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  and  ');			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']; 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 Began = A['Began'];												-- these two are deprecated because the module understands date ranges local Ended = A['Ended']; local SeriesLink = A['SeriesLink']; 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) then												-- promote airdate or Began/Ended to date if is_set (AirDate) then Date = AirDate; elseif is_set (Began) then											-- deprecated if Began:match('%s') or Ended:match('%s') then					-- so we don't create errors: if either has spaces then Date = Began .. ' – ' .. Ended;								-- use spaced ndash as separator else Date = Began .. '–' .. Ended;								-- elsewise no spaces end end 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 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 = '';													-- unset 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 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']) 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 = " (" .. 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 is_set(Date) then local Month = A['Month']; if is_set(Month) then Date = Month .. " " .. Date; end elseif 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, COinS_date, error_message = dates({['accessdate']=AccessDate, ['archivedate']=ArchiveDate, ['date']=Date, ['doi_brokendate']=DoiBroken,			['embargo']=Embargo, ['laydate']=LayDate, ['publicationdate']=PublicationDate, ['year']=Year});

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 table.insert( z.message_tail, { set_error( 'citation_missing_title', {}, true ) } ); end if 'none' == Title and is_set(Periodical) and not (( config.CitationClass == "encyclopaedia" ) or ( config.CitationClass == "citation" and is_set (Encyclopedia))) then								-- special case Title = '';																-- set title to empty string add_maint_cat ('untitled'); end

-- 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 -- this is the function call to COinS local OCinSoutput = COinS({		['Periodical'] = Periodical,		['Chapter'] = strip_apostrophe_markup (coins_chapter),					-- Chapter stripped of bold / italic wikimarkup		['Title'] = make_coins_title (coins_title, ScriptTitle),				-- Title and ScriptTitle stripped of bold / italic wikimarkup		['PublicationPlace'] = PublicationPlace,		['Date'] = first_set(COinS_date, Date),		-- COinS_date has correctly formatted date if Date is valid; any reason to keep Date here? Should we be including invalid dates in metadata?		['Series'] = Series,		['Volume'] = Volume,		['Issue'] = Issue,		['Pages'] = get_coins_pages (first_set(Sheet, Sheets, Page, Pages, At)),				-- pages stripped of external links		['Edition'] = Edition,		['PublisherName'] = PublisherName,		['URL'] = first_set( URL, ChapterURL ),		['Authors'] = a,		['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 = 'Newsgroup: ' .. external_link( 'news:' .. PublisherName, 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. do																			-- do-block to limit scope of LastFirstAuthors local LastFirstAuthors; local Maximum = A['DisplayAuthors'];

Maximum, author_etal = get_display_authors_editors (Maximum, #a, 'authors', author_etal);

local control = { format = NameListFormat,											-- empty string or 'vanc' maximum = Maximum, lastauthoramp = LastAuthorAmp, page_name = this_page.text				-- get current page name so that we don't wikilink to it via authorlinkn };		-- If the coauthor field is also used, prevent ampersand and et al. formatting. if is_set(Coauthors) then control.lastauthoramp = nil; control.maximum = #a + 1; end LastFirstAuthors = list_people(control, a, author_etal);

if is_set (Authors) then if is_set (LastFirstAuthors) then									-- if both author name styles table.insert( z.message_tail, { set_error( 'redundant_parameters', {wrap_style ('parameter', 'authors') .. ' and ' .. wrap_style ('parameter', 'last')}, true ) } );		-- add error message Authors = LastFirstAuthors;										-- TODO: is this correct or should we use |authors= instead? end else Authors = LastFirstAuthors;											-- 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

local EditorCount;															-- used only for choosing {ed.) or (eds.) annotation at end of editor name-list	if not is_set(Editors) then		local Maximum = A['DisplayEditors'];

Maximum, editor_etal = get_display_authors_editors (Maximum, #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

local control = { format = NameListFormat,											-- empty string or 'vanc' maximum = Maximum, lastauthoramp = LastAuthorAmp, page_name = this_page.text				-- get current page name so that we don't wikilink to it via editorlinkn };

Editors, EditorCount = list_people(control, e, editor_etal); 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 else EditorCount = 1; 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'); ChapterFormat = style_format (ChapterFormat, ChapterURL, 'chapter-format', 'chapter-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');

if not is_set(URL) then --and --		not is_set(ArchiveURL) then --and										-- prevents format_missing_url error from registering --		not is_set(ConferenceURL) and											-- TODO: keep this here? conference as part of cite web or cite podcast? --		not is_set(TranscriptURL) then											-- TODO: remove? |transcript-url= and |transcript= has separate test -- Test if cite web or cite podcast |url= is missing or empty if in_array(config.CitationClass, {"web","podcast", "mailinglist"}) then 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, 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 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 OriginalFormat = ChapterFormat;										-- and original |format= if 'no' ~= DeadURL then ChapterURL = ArchiveURL											-- swap-in the archive's url URLorigin = 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","pressrelease","podcast", "newsgroup", 'arxiv'}) or		('citation' == config.CitationClass and is_set (Periodical) and not is_set (Encyclopedia)) then if is_set (Chapter) or is_set (TransChapter) or is_set (ChapterURL)then	-- chapter parameters not supported for these citation types table.insert( z.message_tail, { set_error( 'chapter_ignored', {}, true ) } );		-- add error message Chapter = '';														-- set to empty string to be safe with concatenation TransChapter = ''; ChapterURL = ''; end else																		-- otherwise, format chapter / article title Chapter = format_chapter_title (Chapter, TransChapter, ChapterURL, ChapterURLorigin); if is_set (Chapter) then if 'map' == config.CitationClass and is_set (TitleType) then Chapter = Chapter .. ' ' .. TitleType; end Chapter = Chapter .. ChapterFormat .. sepc .. ' ';		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","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' ); 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 ) .. 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 ); 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']; if is_set(Minutes) then Position = " " .. Minutes .. " " .. cfg.messages['minutes']; else local Time = A['Time']; 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 if not is_set(Page) then if is_set(Pages) then if is_set(Periodical) and not in_array(config.CitationClass, {"encyclopaedia","web","book","news","podcast"}) then Pages = ": " .. Pages; elseif tonumber(Pages) ~= nil then Pages = sepc .." " .. PPrefix .. Pages; else Pages = sepc .." " .. PPPrefix .. Pages; end end else if is_set(Periodical) and not in_array(config.CitationClass, {"encyclopaedia","web","book","news","podcast"}) then Page = ": " .. Page; else Page = sepc .." " .. PPrefix .. Page; end end

if 'map' == config.CitationClass then										-- cite map oddity done after COinS call (and with other in-source locators) if is_set (Sheet) or is_set (Sheets) then local err_msg1 = 'sheet=, &#124;sheets';							-- default error message in case any of page pages or at are set local err_msg2; if is_set (Page) or is_set (Pages) or is_set (At) then				-- are any set? err_msg2 = 'page=, &#124;pages=, &#124;at';						-- a generic error message Page = ; Pages = ; At = ''; elseif is_set (Sheet) and is_set (Sheets) then						-- if both are set make error message err_msg1 = 'sheet'; err_msg2 = 'sheets'; end if is_set (err_msg2) then table.insert( z.message_tail, { set_error( 'redundant_parameters', {wrap_style ('parameter', err_msg1) .. ' and ' .. wrap_style ('parameter', err_msg2)}, true ) } );		-- add error message end if not is_set (Sheet) then											-- do sheet static text and formatting; Sheet has priority over Sheets if both provided if is_set (Sheets) then if is_set (Periodical) then Sheet = ": Sheets " .. Sheets;							-- because Sheet has priority, no need to support both later on					else Sheet = sepc .. " Sheets " .. Sheets; end end else if is_set (Periodical) then Sheet = ": Sheet " .. Sheet; else Sheet = sepc .. " Sheet " .. Sheet; end end end end

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, this_page.namespace);			-- format, categories (article namespace only), 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 "";

TitleNote = is_set(TitleNote) and (sepc .. " " .. TitleNote) or ""; Edition = is_set(Edition) and (" " .. wrap_msg ('edition', Edition)) or ""; Issue = is_set(Issue) and (" (" .. Issue .. ")") or ""; Series = is_set(Series) and (sepc .. " " .. Series) or ""; OrigYear = is_set(OrigYear) and (" [" .. OrigYear .. "]") or ""; Agency = is_set(Agency) and (sepc .. " " .. Agency) or "";

if is_set(Volume) then if ( mw.ustring.len(Volume) > 4 ) then Volume = sepc .." " .. Volume; else Volume = " '''" .. hyphen_to_dash(Volume) .. "'''";		end end

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 in_array(SubscriptionRequired:lower, {'yes', 'true', 'y'}) then SubscriptionRequired = sepc .. " " .. cfg.messages['subscription'];		-- subscription required message elseif in_array(RegistrationRequired:lower, {'yes', 'true', 'y'}) 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 Quote = Quote:sub(2,-2); end Quote = sepc .." " .. wrap_style ('quoted-text', Quote ); 				-- wrap in ... tags PostScript = "";														-- CS1 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 ) .. ArchiveFormat, ArchiveDate } ); if not is_set(OriginalURL) then Archived = Archived .. " " .. set_error('archive_missing_url'); end elseif is_set(OriginalURL) then local arch_text = cfg.messages['archived-dead']; if sepc ~= "." then arch_text = arch_text:lower end Archived = sepc .. " " .. substitute( arch_text,				{ external_link( OriginalURL, cfg.messages['original'] ) .. OriginalFormat, ArchiveDate } );	-- format already styled 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'] ) .. LayFormat .. LaySource .. LayDate else Lay = sepc .. " " .. external_link( LayURL, cfg.messages['lay summary']:lower ) .. 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 ); 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 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, Issue}, sepc ); 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, Issue}, 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, Issue, 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 .. Page .. Pages .. At; if is_set(Authors) then if is_set(Coauthors) then local sep = '; '; if 'vanc' == NameListFormat then sep = ', '; end Authors = Authors .. sep .. Coauthors; end if is_set(Date) then Date = " ("..Date..")" .. OrigYear .. sepc .. " "		elseif string.sub(Authors,-1,-1) == sepc then Authors = Authors .. " "		else Authors = Authors .. sepc .. " "		end if is_set(Editors) then local in_text = " "; local post_text = ""; if is_set(Chapter) then in_text = in_text .. cfg.messages['in'] .. " "			else if EditorCount <= 1 then post_text = ", " .. cfg.messages['editor']; else post_text = ", " .. cfg.messages['editors']; end end if (sepc ~= '.') then in_text = in_text:lower end Editors = in_text .. Editors .. post_text; if (string.sub(Editors,-1,-1) == sepc) or (string.sub(Editors,-3,-1) == sepc .. ']]') then	-- if last editor name ends with sepc char Editors = Editors .. " ";										-- don't add another else Editors = Editors .. sepc .. " "								-- otherwise terninate the editor list end end text = safe_join( {Authors, Date, Chapter, Place, Editors, tcommon }, sepc ); text = safe_join( {text, pgtext, idcommon}, sepc ); 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 Date = " (" .. Date ..")" .. OrigYear .. sepc .. " "		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}, sepc ); text = safe_join( {text, pgtext, idcommon}, sepc ); else if is_set(Date) then if ( string.sub(tcommon,-1,-1) ~= sepc ) then Date = sepc .." " .. Date .. OrigYear else Date = " " .. Date .. OrigYear end end if config.CitationClass=="journal" and is_set(Periodical) then text = safe_join( {Chapter, Place, tcommon}, sepc ); text = safe_join( {text, pgtext, Date, idcommon}, sepc ); else text = safe_join( {Chapter, Place, tcommon, Date}, sepc ); text = safe_join( {text, 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 = "citation " .. config.CitationClass; else options.class = "citation"; end if is_set(Ref) and Ref:lower ~= "none" then local id = Ref if ( "harv" == Ref ) then local names = {} --table of last names & year if #a > 0 then for i,v in ipairs(a) do 					names[i] = v.last if i == 4 then break end end elseif #e > 0 then for i,v in ipairs(e) do 					names[i] = v.last if i == 4 then break end end end names[ #names + 1 ] = first_set(Year, anchor_year);	-- Year first for legacy citations and for YMD dates that require disambiguation id = anchor_id(names) 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 then 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

-- 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

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 #suggestions == 0 then suggestions = mw.loadData( 'Module:Citation/CS1/Suggestions' ); end if suggestions[ k:lower ] ~= nil then error_text, error_state = set_error( 'parameter_ignored_suggest', {k, suggestions[ k:lower ]}, true ); else error_text, error_state = set_error( 'parameter_ignored', {k}, true ); 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 return citation0( config, args) end

return z