Module:Citation/CS1

local z = { error_categories = {}; error_ids = {}; message_tail = {}; }

-- Include translation message hooks, ID and error handling configuration settings. local cfg = mw.loadData( 'Module:Citation/CS1/Configuration' );

-- Contains a list of all recognized parameters local whitelist = mw.loadData( 'Module:Citation/CS1/Whitelist' );

-- Whether variable is set or not function is_set( var ) return not (var == nil or var == ''); end

-- First set variable or nil if none function first_set(...) local list = {...}; for _, var in pairs(list) do       if is_set( var ) then return var; end end end

-- Whether needle is in haystack function inArray( 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

-- Populates numbered arguments in a message string using an argument table. function substitute( msg, args ) return args and tostring( mw.message.newRawMessage( msg, args ) ) or msg; end

-- Wraps a string using a message_list configuration taking one argument function wrap( key, str, lower ) if not is_set( str ) then return ""; elseif inArray( key, { 'italic-title', 'trans-italic-title' } ) then str = safeforitalics( str ); end if lower == true then return substitute( cfg.messages[key]:lower, {str} ); else return substitute( cfg.messages[key], {str} ); end 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. 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] = selectone( 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

-- Checks that parameter name is valid using the whitelist function validate( name ) name = tostring( name ); -- Normal arguments if whitelist.basic_arguments[ name ] then return true; end -- Arguments with numbers in them name = name:gsub( "%d+", "#" ); if whitelist.numbered_arguments[ name ] then return true; end -- Not found, argument not supported. return false end

-- Formats a comment for error trapping function errorcomment( content, hidden ) return wrap( hidden and 'hidden-error' or 'visible-error', content ); end

-- 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. function seterror( 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 inArray( 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 errorcomment( message, error_state.hidden ); end

-- Formats a wiki style external link function externallinkid(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

-- Formats a wiki style internal link function internallinkid(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

-- Format an external link with error checking function externallink( URL, label, source ) local error_str = ""; if not is_set( label ) then label = URL; if is_set( source ) then error_str = seterror( 'bare_url_missing_title', { wrap( 'parameter', source ) }, false, " " ); else error( cfg.messages["bare_url_no_origin"] ); end end if not checkurl( URL ) then error_str = seterror( 'bad_url', {}, false, " " ) .. error_str; end return table.concat({ "[", URL, " ", safeforurl( label ), "]", error_str }); end

-- Formats a link to Amazon function amazon(id, domain) if not is_set(domain) then domain = "com" elseif ( "jp" == domain or "uk" == domain ) then domain = "co." .. domain end local handler = cfg.id_handlers['ASIN']; return externallinkid({link = handler.link,       label=handler.label, prefix="//www.amazon."..domain.."/dp/",id=id,        encode=handler.encode, separator = handler.separator}) end

--[[ Formats a PMC and checks for embargoed articles. The embargo parameter takes a date for a value. If the embargo date is in the futue the PMC identifier will not be linked to the article.  If the embargo specifies a date 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'].link.

The version of  links the citation title (if url parameter is empty) when embargo date is in the past or when embargo parameter is missing or empty. That behavior is inconsistent with the behavior of other identifiers used in CS1 and is not supported here. ]] function pmc(id, embargo) local handler = cfg.id_handlers['PMC']; local text; 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 and tonumber( embargo_date ) < tonumber( todays_date ) then	--if embargo date is in the past then text = externallinkid({link = handler.link, label = handler.label,			--ok to link to article				prefix=handler.prefix,id=id,separator=handler.separator, encode=handler.encode}) else text="" .. handler.label .. ":" .. handler.separator .. id;	--still embargoed so no external link end else text = externallinkid({link = handler.link, label = handler.label,			--no embargo date, ok to link to article			prefix=handler.prefix,id=id,separator=handler.separator, encode=handler.encode}) end return text end

-- Formats a DOI and checks for DOI errors. function doi(id, inactive) local cat = "" local handler = cfg.id_handlers['DOI']; local text; if is_set(inactive) then text = "" .. handler.label .. ":" .. id; table.insert( z.error_categories, "Pages with DOIs inactive since " .. selectyear(inactive) ); inactive = " (" .. cfg.messages['inactive'] .. " " .. inactive .. ")" else text = externallinkid({link = handler.link, label = handler.label,           prefix=handler.prefix,id=id,separator=handler.separator, encode=handler.encode}) inactive = "" end if ( string.sub(id,1,3) ~= "10." ) then cat = seterror( 'bad_doi' ); end return text .. inactive .. cat end

-- Formats an OpenLibrary link, and checks for associated errors. function openlibrary(id) local code = id:sub(-1,-1) local handler = cfg.id_handlers['OL']; if ( code == "A" ) then return externallinkid({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 externallinkid({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 externallinkid({link=handler.link, label=handler.label,           prefix= "http://openlibrary.org/works/OL",id=id, separator=handler.separator,            encode = handler.encode}) else return externallinkid({link=handler.link, label=handler.label,           prefix= "http://openlibrary.org/OL",id=id, separator=handler.separator,            encode = handler.encode}) .. ' ' .. seterror( 'bad_ol' ); end end

--[[ 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. ]] function issn(id) local clean_issn; 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 temp = 0; local text; local valid_issn = true;

id=id:gsub( "[%s-–]", "" );									-- strip spaces, hyphens, and ndashes from the issn clean_issn=string.sub( id, 1, 4 ) .. "-" .. string.sub( id, 5 );	-- make a copy with a hyphen after 4 digits; use this version for display if issn validates

if 8 ~= id:len or nil == id:match( "^%d*X?$" ) then		-- validate the issn: 8 didgits long, containing only 0-9 or X in the last position valid_issn=false;										-- wrong length or improper character else id = { id:byte(1, 8) };									-- table of individual bytes for i, v in ipairs( id ) do								-- loop through all of the byte an calculate the checksum if v == string.byte( "X" ) then						-- if checkdigit is X				temp = temp + 10*( 9 - i );						-- it represents 10 decimal else temp = temp + tonumber( string.char(v) )*(9-i); end end valid_issn = temp % 11 == 0;							-- checksum must be zero for valid issn end

if true == valid_issn then id = clean_issn;										-- if valid, use the cleaned-up version for the display else id = issn_copy;											-- if not valid, use the show the invalid issn with error message end text = externallinkid({link = handler.link, label = handler.label,		prefix=handler.prefix,id=id,separator=handler.separator, encode=handler.encode}) if false == valid_issn then text = text .. ' ' .. seterror( 'bad_issn' )			-- add an error message if the issn is invalid end return text end

--[[ Determines whether an 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. ]] function checkurl( url_str ) -- Protocol-relative or URL scheme return url_str:sub(1,2) == "//" or url_str:match( "^[^/]*:" ) ~= nil; end

-- Removes irrelevant text and dashes from ISBN number -- Similar to that used for Special:BookSources function cleanisbn( isbn_str ) return isbn_str:gsub( "[^-0-9X]", "" ); end

-- Determines whether an ISBN string is valid function checkisbn( isbn_str ) isbn_str = cleanisbn( isbn_str ):gsub( "-", "" ); local len = isbn_str:len; if len ~= 10 and len ~= 13 then return false; end local temp = 0; if len == 10 then if isbn_str:match( "^%d*X?$" ) == nil then return false; end isbn_str = { isbn_str:byte(1, len) }; for i, v in ipairs( isbn_str ) do           if v == string.byte( "X" ) then temp = temp + 10*( 11 - i ); else temp = temp + tonumber( string.char(v) )*(11-i); end end return temp % 11 == 0; else if isbn_str:match( "^%d*$" ) == nil then return false; end 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

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

-- Escape sequences for content that will be used for URL descriptions function safeforurl( str ) if str:match( "%[%[.-%]%]" ) ~= nil then table.insert( z.message_tail, { seterror( 'wikilink_in_url', {}, true ) } ); end return str:gsub( '[%[%]\n]', {           ['['] = '&#91;',        [']'] = '&#93;',        ['\n'] = ' ' } ); end

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

-- Protects a string that will be wrapped in wiki italic markup '' ... '' function safeforitalics( str ) -- Note: We can not 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. 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

-- Joins a sequence of strings together while checking for duplicate separation characters. function safejoin( 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 = ''; local comp = ''; local end_chr = ''; local trim; for _, value in ipairs( tbl ) do       if value == nil then value = ''; end if str == '' then str = value; elseif value ~= '' then if value:sub(1,1) == '<' then -- Special case of values enclosed in spans and other markup. comp = value:gsub( "%b<>", "" ); else comp = value; end if comp:sub(1,1) == duplicate_char then trim = false; end_chr = str:sub(-1,-1); -- str = str .. "<HERE(enchr=" .. end_chr.. ")" if end_chr == duplicate_char then str = str:sub(1,-2); elseif end_chr == "'" then if str:sub(-3,-1) == duplicate_char .. "''" then str = str:sub(1, -4) .. "''";                   elseif str:sub(-5,-1) == duplicate_char .. "]]''" then trim = true; elseif str:sub(-4,-1) == duplicate_char .. "]''" then trim = true; end elseif end_chr == "]" then if str:sub(-3,-1) == duplicate_char .. "]]" then trim = true; elseif str:sub(-2,-1) == duplicate_char .. "]" then trim = true; end elseif end_chr == " " then if str:sub(-2,-1) == duplicate_char .. " " then str = str:sub(1,-3); end end

if trim then if value ~= comp then local dup2 = duplicate_char; if dup2:match( "%A" ) then dup2 = "%" .. dup2; end value = value:gsub( "(%b<>)" .. dup2, "%1", 1 ) else value = value:sub( 2, -1 ); end end end str = str .. value; end end return str; end

-- Return the year portion of a date string, if possible. Returns empty string if the argument can not be interpreted as a year. function selectyear( str ) -- Is the input a simple number? local num = tonumber( str ); if num ~= nil and num > 0 and num < 2100 and num == math.floor(num) then return str; else -- Use formatDate to interpret more complicated formats local lang = mw.getContentLanguage; local good, result; good, result = pcall( lang.formatDate, lang, 'Y', str ); if good then return result; else -- extract year if the date uses seasons str=string.lower (str); local seasons={"winter", "spring", "summer", "fall", "autumn"}; local date_string_split=mw.text.split (str, "[%s%-/–]");     -- split date string into parts; white space, hyphen, forward slash, and ndash are allowed separators local has_season=false; for n,season_value in ipairs(seasons) do               -- for each season ...                for n,split_value in ipairs(date_string_split) do   -- ... loop through date string values if split_value == season_value then            -- does the split value match the season value? if has_season==false then                  -- found one. if this one is the first we've found ...                           has_season=true;                        -- ... remember that we found a season end elseif has_season==true then                   -- if split_value isn't a season, and we've previously found a season ...                        num = tonumber( split_value );              -- ... convert current split value to a number if we can if num ~= nil and num > 0 and num < 2100 and num == math.floor(num) then   -- if it's a suitable number return tostring( num );                                                -- return it as a string end -- if num end -- if string.find end -- for split value loop end -- season value loop end -- if good end -- if num end -- selectyear

-- Attempts to convert names to initials. function reducetoinitials(first) local initials = {} for word in string.gmatch(first, "%S+") do       table.insert(initials, string.sub(word,1,1)) -- Vancouver format does not include full stops. end return table.concat(initials) -- Vancouver format does not include spaces. end

-- Formats a list of people (e.g. authors / editors) function listpeople(control, people) local sep = control.sep; local namesep = control.namesep local format = control.format local maximum = control.maximum local lastauthoramp = control.lastauthoramp; local text = {} local etal = false; if sep:sub(-1,-1) ~= " " then sep = sep .. " " end if maximum ~= nil and maximum < 1 then return "", 0; end for i,person in ipairs(people) do       if is_set(person.last) then local mask = person.mask local one local sep_one = sep; if maximum ~= nil 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 first = reducetoinitials(first) end one = one .. namesep .. first end if is_set(person.link) then one = "" .. one .. "" end 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 -- if necessary wrap result in tag to format in Small Caps if ( "scap" == format ) then result = ' ' .. result .. ' ';   end return result, count end

-- Generates a CITEREF anchor ID. function anchorid( options ) return "CITEREF" .. table.concat( options ); end

-- Gets name list from the input arguments function extractnames(args, list_name) local names = {}; local i = 1; local last; while true do       last = selectone( args, cfg.aliases[list_name .. '-Last'], 'redundant_parameters', i ); if not is_set(last) then -- just in case someone passed in an empty parameter break; end names[i] = { last = last, first = selectone( args, cfg.aliases[list_name .. '-First'], 'redundant_parameters', i ), link = selectone( args, cfg.aliases[list_name .. '-Link'], 'redundant_parameters', i ), mask = selectone( args, cfg.aliases[list_name .. '-Mask'], 'redundant_parameters', i ) };       i = i + 1; end return names; end

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

-- Takes a table of IDs and turns it into a table of formatted ID outputs. function buildidlist( 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, externallinkid( handler ) } ); elseif handler.mode == 'internal' then table.insert( new_list, {handler.label, internallinkid( 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 == 'ASIN' then table.insert( new_list, {handler.label, amazon( v, options.ASINTLD ) } ); 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 == 'ISSN' then table.insert( new_list, {handler.label, issn( v ) } ); elseif k == 'ISBN' then local ISBN = internallinkid( handler ); if not checkisbn( v ) and not is_set(options.IgnoreISBN) then ISBN = ISBN .. seterror( 'bad_isbn', {}, false, " ", "" ); end table.insert( new_list, {handler.label, ISBN } ); else error( cfg.messages['unknown_manual_ID'] ); end end function comp( a, b ) 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 -- Chooses one matching parameter from a list of parameters to consider -- Generates an error if more than one match is present. function selectone( 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( '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( 'parameter', selected ); table.insert( z.message_tail, { seterror( error_condition, {error_str}, true ) } ); end return value, selected; end

-- COinS metadata (see ) allows automated tools to parse -- the citation information. function COinS(data) 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( removewikilink( 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.btitle"] = data.Chapter; OCinSoutput["rft.atitle"] = data.Title; elseif is_set(data.Periodical) then OCinSoutput.rft_val_fmt = "info:ofi/fmt:kev:mtx:journal"; OCinSoutput["rft.genre"] = "article"; 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 = cleanisbn( 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

-- This is the main function foing the majority of the citation formatting. function citation0( config, args) --    Load Input Parameters    The argment_wrapper facillitates the mapping of multiple    aliases to single internal variable. local A = argument_wrapper( args );

local i    local PPrefix = A['PPrefix'] local PPPrefix = A['PPPrefix'] if is_set( A['NoPP'] ) then PPPrefix = "" PPrefix = "" end -- Pick out the relevant fields from the arguments. Different citation templates -- define different field names for the same underlying things. local Authors = A['Authors']; local a = extractnames( args, 'AuthorList' );

local Coauthors = A['Coauthors']; local Others = A['Others']; local Editors = A['Editors']; local e = extractnames( args, 'EditorList' );

local Year = A['Year']; local PublicationDate = A['PublicationDate']; local OrigYear = A['OrigYear']; local Date = A['Date']; local LayDate = A['LayDate']; - Get title data local Title = A['Title']; local BookTitle = A['BookTitle']; local Conference = A['Conference']; local TransTitle = A['TransTitle']; local TitleNote = A['TitleNote']; local TitleLink = A['TitleLink']; local Chapter = A['Chapter']; local ChapterLink = A['ChapterLink']; local TransChapter = A['TransChapter']; local TitleType = A['TitleType']; local ArchiveURL = A['ArchiveURL']; local URL = A['URL'] local URLorigin = A:ORIGIN('URL'); local ChapterURL = A['ChapterURL']; local ChapterURLorigin = A:ORIGIN('ChapterURL'); local ConferenceURL = A['ConferenceURL']; local ConferenceURLorigin = A:ORIGIN('ConferenceURL'); local Periodical = A['Periodical']; if ( config.CitationClass == "encyclopaedia" ) then if not is_set(Chapter) then if not is_set(Title) then Title = Periodical; Periodical = ''; else Chapter = Title TransChapter = TransTitle Title = ''; TransTitle = ''; end end end

local Series = A['Series']; local Volume = A['Volume']; local Issue = A['Issue']; local Position = ''; local Page, Pages, At, page_type; Page = A['Page']; Pages = hyphentodash( A['Pages'] ); At = A['At']; if is_set(Page) then if is_set(Pages) or is_set(At) then Page = Page .. " " .. seterror('extra_pages'); Pages = ''; At = ''; end elseif is_set(Pages) then if is_set(At) then Pages = Pages .. " " .. seterror('extra_pages'); At = ''; end end local Edition = A['Edition']; local PublicationPlace = A['PublicationPlace'] local Place = A['Place']; if not is_set(PublicationPlace) and is_set(Place) then PublicationPlace = Place; end if PublicationPlace == Place then Place = ''; end local PublisherName = A['PublisherName']; local RegistrationRequired = A['RegistrationRequired']; local SubscriptionRequired = A['SubscriptionRequired']; local Via = A['Via']; local AccessDate = A['AccessDate']; local ArchiveDate = A['ArchiveDate']; local Agency = A['Agency']; local DeadURL = A['DeadURL'] local Language = A['Language']; local Format = A['Format']; local Ref = A['Ref']; local DoiBroken = A['DoiBroken']; local ID = A['ID']; local ASINTLD = A['ASINTLD']; local IgnoreISBN = A['IgnoreISBN']; local Embargo = A['Embargo'];

local ID_list = extractids( args ); local Quote = A['Quote']; local PostScript = A['PostScript']; local LayURL = A['LayURL']; local LaySource = A['LaySource']; local Transcript = A['Transcript']; local TranscriptURL = A['TranscriptURL'] local TranscriptURLorigin = A:ORIGIN('TranscriptURL'); local sepc = A['Separator']; local LastAuthorAmp = A['LastAuthorAmp']; local no_tracking_cats = A['NoTracking'];

local use_lowercase = ( sepc ~= '.' ); local this_page = mw.title.getCurrentTitle; --Also used for COinS and for language if not is_set(no_tracking_cats) then for k, v in pairs( cfg.uncategorized_namespaces ) do           if this_page.nsText == v then no_tracking_cats = "true"; break; end end end

-- At this point fields may be nil if they weren't specified in the template use. We can use that fact. -- Account for the oddity that is, before generation of COinS data. if is_set(BookTitle) then Chapter = Title; ChapterLink = TitleLink; TransChapter = TransTitle; Title = BookTitle; TitleLink = ''; TransTitle = ''; end -- Account for the oddity that is, before generation of COinS data. if config.CitationClass == "episode" then local AirDate = A['AirDate']; local SeriesLink = A['SeriesLink']; local Season = A['Season']; local SeriesNumber = A['SeriesNumber']; local Network = A['Network']; local Station = A['Station']; local s, n = {}, {}; local Sep = (first_set(A["SeriesSeparator"], A["Separator"]) or "") .. " ";       if is_set(Issue) then table.insert(s, cfg.messages["episode"] .. " " .. Issue); Issue = ''; end if is_set(Season) then table.insert(s, cfg.messages["season"] .. " " .. Season); end if is_set(SeriesNumber) then table.insert(s, cfg.messages["series"] .. " " .. SeriesNumber); end if is_set(Network) then table.insert(n, Network); end if is_set(Station) then table.insert(n, Station); end Date = Date or AirDate; Chapter = Title; ChapterLink = TitleLink; TransChapter = TransTitle; Title = Series; TitleLink = SeriesLink; TransTitle = ''; Series = table.concat(s, Sep); ID = table.concat(n, Sep); end -- COinS metadata (see ) for -- automated parsing of citation information. local OCinSoutput = COinS{ ['Periodical'] = Periodical, ['Chapter'] = Chapter, ['Title'] = Title, ['PublicationPlace'] = PublicationPlace, ['Date'] = first_set(Date, Year, PublicationDate), ['Series'] = Series, ['Volume'] = Volume, ['Issue'] = Issue, ['Pages'] = first_set(Page, Pages, At), ['Edition'] = Edition, ['PublisherName'] = PublisherName, ['URL'] = first_set( URL, ChapterURL ), ['Authors'] = a,       ['ID_list'] = ID_list, ['RawPage'] = this_page.prefixedText, };

if is_set(Periodical) and not is_set(Chapter) and is_set(Title) then Chapter = Title; ChapterLink = TitleLink; TransChapter = TransTitle; Title = ''; TitleLink = ''; TransTitle = ''; 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. if not is_set(Authors) then local Maximum = tonumber( A['DisplayAuthors'] ); -- Preserve old-style implicit et al.       if not is_set(Maximum) and #a == 9 then Maximum = 8; table.insert( z.message_tail, { seterror('implict_etal_author', {}, true ) } ); elseif not is_set(Maximum) then Maximum = #a + 1; end local control = { sep = A["AuthorSeparator"] .. " ",           namesep = (first_set(A["AuthorNameSeparator"], A["NameSeparator"]) or "") .. " ",           format = A["AuthorFormat"], maximum = Maximum, lastauthoramp = LastAuthorAmp };       -- 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 Authors = listpeople(control, a)    end

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, { seterror('coauthors_missing_author', {}, true) } );	-- emit error message end

local EditorCount if not is_set(Editors) then local Maximum = tonumber( A['DisplayEditors'] ); -- Preserve old-style implicit et al.       if not is_set(Maximum) and #e == 4 then Maximum = 3; table.insert( z.message_tail, { seterror('implict_etal_editor', {}, true) } ); elseif not is_set(Maximum) then Maximum = #e + 1; end

local control = { sep = A["EditorSeparator"] .. " ",           namesep = (first_set(A["EditorNameSeparator"], A["NameSeparator"]) or "") .. " ",           format = A['EditorFormat'], maximum = Maximum, lastauthoramp = LastAuthorAmp };

Editors, EditorCount = listpeople(control, e); else EditorCount = 1; end

local Cartography = ""; local Scale = ""; if config.CitationClass == "map" then if not is_set( Authors ) and is_set( PublisherName ) then Authors = PublisherName; PublisherName = ""; end Cartography = A['Cartography']; if is_set( Cartography ) then Cartography = sepc .. " " .. wrap( 'cartography', Cartography, use_lowercase ); end Scale = A['Scale']; if is_set( Scale ) then Scale = sepc .. " " .. Scale; end end if not is_set(Date) then Date = Year; if is_set(Date) then local Month = A['Month']; if is_set(Month) then Date = Month .. " " .. Date; local Day = A['Day'] if is_set(Day) then Date = Day .. " " .. Date end end end end if inArray(PublicationDate, {Date, Year}) then PublicationDate = ''; end if not is_set(Date) and is_set(PublicationDate) then Date = PublicationDate; PublicationDate = ''; end

-- Captures the value for Date prior to adding parens or other textual transformations local DateIn = Date; if not is_set(URL) and not is_set(ChapterURL) and not is_set(ArchiveURL) and not is_set(ConferenceURL) and not is_set(TranscriptURL) then -- Test if cite web is called without giving a URL if ( config.CitationClass == "web" ) then table.insert( z.message_tail, { seterror( 'cite_web_url', {}, true ) } ); end -- Test if accessdate is given without giving a URL if is_set(AccessDate) then table.insert( z.message_tail, { seterror( 'accessdate_missing_url', {}, true ) } ); AccessDate = ''; end -- Test if format is given without giving a URL if is_set(Format) then Format = Format .. seterror( 'format_missing_url' ); end end -- Test if citation has no title if not is_set(Chapter) and not is_set(Title) and not is_set(Periodical) and not is_set(Conference) and not is_set(TransTitle) and not is_set(TransChapter) then table.insert( z.message_tail, { seterror( 'citation_missing_title', {}, true ) } ); end Format = is_set(Format) and " (" .. Format .. ")" or ""; local OriginalURL = URL DeadURL = DeadURL:lower; if is_set( ArchiveURL ) then if ( DeadURL ~= "no" ) then URL = ArchiveURL URLorigin = A:ORIGIN('ArchiveURL') end end -- Format chapter / article title if is_set(Chapter) and is_set(ChapterLink) then Chapter = "" .. Chapter .. ""; end if is_set(Periodical) and is_set(Title) then Chapter = wrap( 'italic-title', Chapter ); TransChapter = wrap( 'trans-italic-title', TransChapter ); else Chapter = wrap( 'quoted-title', Chapter ); TransChapter = wrap( 'trans-quoted-title', TransChapter ); end local TransError = "" if is_set(TransChapter) then if not is_set(Chapter) then TransError = " " .. seterror( 'trans_missing_chapter' ); else TransChapter = " " .. TransChapter; end end Chapter = Chapter .. TransChapter; if is_set(Chapter) then if not is_set(ChapterLink) then if is_set(ChapterURL) then Chapter = externallink( ChapterURL, Chapter ) .. TransError; if not is_set(URL) then Chapter = Chapter .. Format; Format = ""; end elseif is_set(URL) then Chapter = externallink( URL, Chapter ) .. TransError .. Format; URL = ""; Format = ""; else Chapter = Chapter .. TransError; end elseif is_set(ChapterURL) then Chapter = Chapter .. " " .. externallink( ChapterURL, nil, ChapterURLorigin ) .. TransError; else Chapter = Chapter .. TransError; end Chapter = Chapter .. sepc .. " " -- with end-space elseif is_set(ChapterURL) then Chapter = " " .. externallink( ChapterURL, nil, ChapterURLorigin ) .. sepc .. " ";   end -- Format main title. if is_set(TitleLink) and is_set(Title) then Title = "" .. Title .. "" end if is_set(Periodical) then Title = wrap( 'quoted-title', Title ); TransTitle = wrap( 'trans-quoted-title', TransTitle ); elseif inArray(config.CitationClass, {"web","news","pressrelease","conference"}) and not is_set(Chapter) then Title = wrap( 'quoted-title', Title ); TransTitle = wrap( 'trans-quoted-title', TransTitle ); else Title = wrap( 'italic-title', Title ); TransTitle = wrap( 'trans-italic-title', TransTitle ); end TransError = ""; if is_set(TransTitle) then if not is_set(Title) then TransError = " " .. seterror( 'trans_missing_title' ); else TransTitle = " " .. TransTitle; end end Title = Title .. TransTitle; if is_set(Title) then if not is_set(TitleLink) and is_set(URL) then Title = externallink( URL, Title ) .. TransError .. Format URL = ""; Format = ""; else Title = Title .. TransError; end end if is_set(Place) then Place = " " .. wrap( 'written', Place, use_lowercase ) .. sepc .. " ";   end if is_set(Conference) then if is_set(ConferenceURL) then Conference = externallink( ConferenceURL, Conference ); end Conference = sepc .. " " .. Conference elseif is_set(ConferenceURL) then Conference = sepc .. " " .. externallink( 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 inArray(config.CitationClass, {"encyclopaedia","web","book","news"}) 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 inArray(config.CitationClass, {"encyclopaedia","web","book","news"}) then Page = ": " .. Page; else Page = sepc .." " .. PPrefix .. Page; 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 Inset = A['Inset']; if first_set( Pages, Page, At ) ~= nil or sepc ~= '.' then if is_set( Section ) then Section = ", " .. wrap( 'section', Section, true ); end if is_set( Inset ) then Inset = ", " .. wrap( 'inset', Inset, true ); end else if is_set( Section ) then Section = sepc .. " " .. wrap( 'section', Section, use_lowercase ); if is_set( Inset ) then Inset = ", " .. wrap( 'inset', Inset, true ); end elseif is_set( Inset ) then Inset = sepc .. " " .. wrap( 'inset', Inset, use_lowercase ); end end At = At .. Section .. Inset; end

--Look in the list of iso639-1 language codes to see if the value provided in the language parameter matches one of them. If a match is found, 	use that value; if not, then use the value that was provided with the language parameter.	Categories are assigned in a manner similar to the  templates - categorizes only mainspace citations and only when the language code is not 'en' (English). if is_set (Language) then local name = cfg.iso639_1[Language:lower];		-- get the language name if Language parameter has a valid iso 639-1 code if nil == name then Language=" " .. wrap( 'language', Language );	-- no match, use parameter's value else if 0 == this_page.namespace and 'en' ~= Language:lower then	--found a match; is this page main / article space and English not the language? Language=" " .. wrap( 'language', name .. '' );	-- in main space and not English: categorize else Language=" " .. wrap( 'language', name );	--not in mainspace or language is English so don't categorize end end else Language="";	-- language not specified so make sure this is an empty string; end

Others = is_set(Others) and (sepc .. " " .. Others) or ""; TitleType = is_set(TitleType) and (" (" .. TitleType .. ")") or ""; TitleNote = is_set(TitleNote) and (sepc .. " " .. TitleNote) or ""; Edition = is_set(Edition) and (" " .. wrap( '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 = " '''" .. hyphentodash(Volume) .. "'''";       end end totally unrelated data -- Loosely mimic template; Via parameter identifies a delivery source that is not the publisher; these sources often, but not always, exist    behind a registration or paywall.  So here, we've chosen to decouple via from subscription (via has never been part of the registration required template).    Subscription implies paywall; Registration does not.  If both are used in a citation, the subscription required link note is displayed. There are no error messages for this condition. if is_set(Via) then Via = " " .. wrap( 'via', Via ); end

if is_set(SubscriptionRequired) then SubscriptionRequired = sepc .. " " .. cfg.messages['subscription']; --here when 'via' parameter not used but 'subscription' is   elseif is_set(RegistrationRequired) then SubscriptionRequired = sepc .. " " .. cfg.messages['registration']; --here when 'via' and 'subscription' parameters not used but 'registration' is   end

if is_set(AccessDate) then local retrv_text = " " .. cfg.messages['retrieved'] if (sepc ~= ".") then retrv_text = retrv_text:lower end AccessDate = ' ' .. sepc .. substitute( retrv_text, {AccessDate} ) .. ' '   end if is_set(ID) then ID = sepc .." ".. ID; end ID_list = buildidlist( ID_list, {DoiBroken = DoiBroken, ASINTLD = ASINTLD, IgnoreISBN = IgnoreISBN, Embargo=Embargo} );

if is_set(URL) then URL = " " .. externallink( 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( 'quoted-text', Quote ); PostScript = ""; elseif PostScript:lower == "none" then PostScript = ""; end local Archived if is_set(ArchiveURL) then if not is_set(ArchiveDate) then ArchiveDate = seterror('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'],               { externallink( ArchiveURL, arch_text ), ArchiveDate } ); if not is_set(OriginalURL) then Archived = Archived .. " " .. seterror('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,               { externallink( OriginalURL, cfg.messages['original'] ), ArchiveDate } ); else local arch_text = cfg.messages['archived-missing']; if sepc ~= "." then arch_text = arch_text:lower end Archived = sepc .. " " .. substitute( arch_text,                { seterror('archive_missing_url'), ArchiveDate } ); end else Archived = "" end local Lay if is_set(LayURL) then if is_set(LayDate) then LayDate = " (" .. LayDate .. ")" end if is_set(LaySource) then LaySource = " – ''" .. safeforitalics(LaySource) .. "''";       else LaySource = ""; end if sepc == '.' then Lay = sepc .. " " .. externallink( LayURL, cfg.messages['lay summary'] ) .. LaySource .. LayDate else Lay = sepc .. " " .. externallink( LayURL, cfg.messages['lay summary']:lower ) .. LaySource .. LayDate end else Lay = ""; end if is_set(Transcript) then if is_set(TranscriptURL) then Transcript = externallink( TranscriptURL, Transcript ); end elseif is_set(TranscriptURL) then Transcript = externallink( TranscriptURL, nil, TranscriptURLorigin ); end local Publisher; if is_set(Periodical) and not inArray(config.CitationClass, {"encyclopaedia","web","pressrelease"}) 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( 'published', PublicationDate ); else Publisher = PublicationDate; end end if is_set(Publisher) then Publisher = " (" .. Publisher .. ")"; end else if is_set(PublicationDate) then PublicationDate = " (" .. wrap( '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( 'italic-title', Periodical ) else Periodical = wrap( 'italic-title', Periodical ) 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 inArray(config.CitationClass, {"journal","citation"}) and is_set(Periodical) then if is_set(Others) then Others = Others .. sepc .. " " end tcommon = safejoin( {Others, Title, TitleNote, Conference, Periodical, Format, TitleType, Scale, Series,            Language, Cartography, Edition, Publisher, Agency, Volume, Issue}, sepc ); else tcommon = safejoin( {Title, TitleNote, Conference, Periodical, Format, TitleType, Scale, Series, Language,            Volume, Issue, Others, Cartography, Edition, Publisher, Agency}, sepc ); end if #ID_list > 0 then ID_list = safejoin( { sepc .. " ", table.concat( ID_list, sepc .. " " ), ID }, sepc ); else ID_list = ID; end local idcommon = safejoin( { ID_list, URL, Archived, AccessDate, Via, SubscriptionRequired, Lay, Quote }, sepc ); local text; local pgtext = Position .. Page .. Pages .. At; if is_set(Authors) then if is_set(Coauthors) then Authors = Authors .. A['AuthorSeparator'] .. " " .. 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) then Editors = Editors .. " "               else Editors = Editors .. sepc .. " "           end end text = safejoin( {Authors, Date, Chapter, Place, Editors, tcommon }, sepc ); text = safejoin( {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 = safejoin( {Editors, Date, Chapter, Place, tcommon}, sepc ); text = safejoin( {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 = safejoin( {Chapter, Place, tcommon}, sepc ); text = safejoin( {text, pgtext, Date, idcommon}, sepc ); else text = safejoin( {Chapter, Place, tcommon, Date}, sepc ); text = safejoin( {text, pgtext, idcommon}, sepc ); end end if is_set(PostScript) and PostScript ~= sepc then text = safejoin( {text, sepc}, sepc ); --Deals with italics, spaces, etc.        text = text:sub(1,-2); --Remove final seperator end text = safejoin( {text, PostScript}, sepc );

-- Now enclose the whole thing in a element if not is_set(Year) then if is_set(DateIn) then Year = selectyear( DateIn ); elseif is_set(PublicationDate) then Year = selectyear( PublicationDate ); end end 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 ] = Year; id = anchorid(names) end options.id = id; end if string.len(text:gsub("/]*>.- ", ""):gsub("%b<>","")) <= 2 then z.error_categories = {}; text = seterror('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 .. errorcomment( v[1], v[2] ); else text = text .. errorcomment( v[1] .. "; ", v[2] ); end end end end no_tracking_cats = no_tracking_cats:lower; if inArray(no_tracking_cats, {"", "no", "false", "n"}) then for _, v in ipairs( z.error_categories ) do           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 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 = seterror( 'text_ignored', {v}, true ); end elseif validate( k:lower ) then error_text, error_state = seterror( '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 = seterror( 'parameter_ignored_suggest', {k, suggestions[ k:lower ]}, true ); else error_text, error_state = seterror( '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