Module:Citation/CS1

local z = {error_categories = {};error_ids = {};message_tail = {};}
-- Whether variable is set or notfunction is_set( var )return not (var == nil or var == );end
-- First set variable or nil if nonefunction first_set(...)local list = {...};for _, var in pairs(list) do    if is_set( var ) then        return var;    endendend
-- Whether needle is in haystackfunction inArray( needle, haystack )if needle == nil then    return false;endfor n,v in ipairs( haystack ) do    if v == needle then        return n;    endendreturn false;end
--[[Categorize and emit an error message when the citation contains one or more deprecated parameters.  Because deprecated parameters (currently |day=, |month=,|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)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.]]function deprecated_parameter()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, { seterror( 'deprecated_params', {error_message}, true ) } );        -- add error message    table.insert( z.message_tail, { seterror( 'deprecated_params', {}, true ) } );        -- add error messageendend
-- 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;return args and mw.message.newRawMessage( msg, args ):plain() or msg;end
--[[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)]]function kern_quotes (str)local left='%1';        -- spacing to use when title contains leading single or double quote marklocal right='%1';        -- spacing to use when title contains trailing single or double quote markif  str:match ("^[\"\'][^\']") then    str = string.gsub( str, "^[\"\']", left, 1 );                -- replace (captured) leading single or double quote with left-side endif str:match ("[^\'][\"\']$") then    str = string.gsub( str, "[\"\']$", right, 1 );            -- replace (captured) trailing single or double quote with right-side endreturn str;end
-- Wraps a string using a message_list configuration taking one argumentfunction wrap( key, str, lower )if not is_set( str ) then    return "";elseif inArray( key, { 'italic-title', 'trans-italic-title' } ) then    str = safeforitalics( str );endif 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 argumentmapping defined in the configuration file so that multiple namescan 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
--[[Looks for a parameter's name in the whitelist.
Parameters in the whitelist can have three values:true - active, supported parametersfalse - deprecated, supported parametersnil - unsupported parameters]]function validate( name )local name = tostring( name );local state = whitelist.basic_arguments[ name ];-- Normal argumentsif true == state then return true; end        -- valid actively supported parameterif false == state then    deprecated_parameter ();                -- parameter is deprecated but still supported    return true;end-- Arguments with numbers in themname = 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 parameterif false == state then    deprecated_parameter ();                -- parameter is deprecated but still supported    return true;endreturn false;                                -- Not supported because not found or name is set to nilend
-- Formats a comment for error trappingfunction 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 placementof 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 );endlocal message = substitute( error_state.message, arguments );message = message .. " ([[" .. cfg.messages['help page link'] ..    "#" .. error_state.anchor .. "|" ..    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;endmessage = 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 linkfunction externallinkid(options)local url_string = options.id;if options.encode == true or options.encode == nil then    url_string = mw.uri.encode( url_string );endreturn 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 linkfunction 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 checkingfunction 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           endif not checkurl( URL ) then    error_str = seterror( 'bad_url', {}, false, " " ) .. error_str;endreturn table.concat({ "[", URL, " ", safeforurl( label ), "]", error_str });end
-- Formats a link to Amazonfunction amazon(id, domain)if not is_set(domain) then    domain = "com"elseif ( "jp" == domain or "uk" == domain ) then    domain = "co." .. domainendlocal 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
--[[format and error check arXiv identifier.  There are two valid forms of the identifier:the first form, valid only between date codes 9108 and 0703 is:arXiv:<archive>.<class>/<date code><number><version>where:<archive> is a string of alpha characters - may be hyphenated; no other punctuation<class> is a string of alpha characters - may be hyphenated; no other punctuation<date code> 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<number> is a three-digit number<version> is a 1 or more digit number preceded with a lowercase v; no spaces (undocumented)the second form, valid from April 2007 is:arXiv:<date code>.<number><version>where:<date code> 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<number> is a four-digit number<version> is a 1 or more digit number preceded with a lowercase v; no spaces]]
function arxiv (id)local handler = cfg.id_handlers['ARXIV'];local year, month, version;local err_cat = ""year, month, version = id:match("^%a[%a%.%-]+/([90]%d)([01]%d)%d%d%d([v%d]*)$");                -- test for the 9108-0703 formatif not year then        -- arXiv id is not proper 9108-0703 form    year, month, version = id:match("^(%d%d)([01]%d)%.%d%d%d%d([v%d]*)$");    -- test for the 0704- format    if not year then           err_cat = ' ' .. seterror( 'bad_arxiv' );                            -- arXiv id doesn't match either format    else    -- id is the 0704- format        year = tonumber(year);        month = tonumber(month);        if ((7 > year) or (1 > month and 12 < month)) or                    -- is year invalid or is month invalid? (doesn't test for future years)            ((7 == year) and (4 > month)) or                                -- when year is 07, is month invalid (before April)?            is_set (version) and nil == version:match("v%d+") then            -- is version proper format of single 'v' followed by digits?                err_cat = ' ' .. seterror( 'bad_arxiv' );                    -- set error message        end    endelse    -- id is the 9108-0703 format; are the date values ok    year = tonumber(year);    month = tonumber(month);    if ((91 > year and 7 < year) or (1 > month and 12 < month)) or            -- if invalid year or invalid month        ((91 == year and 8 > month) or (7 == year and 3 < month)) or         -- if years ok, are starting and ending months ok?            is_set (version) and nil == version:match("v%d+") then            -- is version proper format of single 'v' followed by digits?                err_cat = ' ' .. seterror( 'bad_arxiv' );                    -- set error message    endend
return externallinkid({link = handler.link, label = handler.label,        prefix=handler.prefix,id=id,separator=handler.separator, encode=handler.encode}) .. err_cat;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.]]
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 itend
local prefixlocal suffixprefix, 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 lccnendreturn 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; therightmost eight are always digits. http://info-uri.info/registry/OAIHandler?verb=GetRecord&metadataPrefix=reg&identifier=info:lccn/
length = 8 then all digitslength = 9 then lccn[1] is alphalength = 10 then lccn[1] and lccn[2] are both alpha or both digitslength = 11 then lccn[1] is alpha, lccn[2] and lccn[3] are both alpha or both digitslength = 12 then lccn[1] and lccn[2] are both alpha
]]function lccn(lccn)local handler = cfg.id_handlers['LCCN'];local err_cat =  ;                                -- presume that LCCN is validlocal 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 = ' ' .. seterror( 'bad_lccn' );    -- set an error message    endelseif 9 == len then                                -- LCCN should be adddddddd    if nil == id:match("%a%d%d%d%d%d%d%d%d") then            -- does it match our pattern?        err_cat = ' ' .. seterror( 'bad_lccn' );    -- set an error message    endelseif 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("^%a%a%d%d%d%d%d%d%d%d") then    -- ... see if it matches our pattern            err_cat = ' ' .. seterror( 'bad_lccn' );    -- no match, set an error message        end    endelseif 11 == len then                                -- LCCN should be aaadddddddd or adddddddddd    if not (id:match("^%a%a%a%d%d%d%d%d%d%d%d") or id:match("^%a%d%d%d%d%d%d%d%d%d%d")) then    -- see if it matches one of our patterns        err_cat = ' ' .. seterror( 'bad_lccn' );    -- no match, set an error message    endelseif 12 == len then                                -- LCCN should be aadddddddddd    if not id:match("^%a%a%d%d%d%d%d%d%d%d%d%d") then    -- see if it matches our pattern        err_cat = ' ' .. seterror( 'bad_lccn' );    -- no match, set an error message    endelse    err_cat = ' ' .. seterror( 'bad_lccn' );        -- wrong length, set an error messageend
if not is_set (err_cat) and nil ~= lccn:find ('%s') then    err_cat = ' ' .. seterror( 'bad_lccn' );        -- lccn contains a space, set an error messageend
return externallinkid({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 itcontains 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.]]function pmid(id)local test_limit = 30000000;                        -- update this value as PMIDs approachlocal handler = cfg.id_handlers['PMID'];local err_cat =  ;                                -- presume that PMID is validif id:match("[^%d]") then                            -- if PMID has anything but digits    err_cat = ' ' .. seterror( 'bad_pmid' );        -- set an error messageelse                                                -- 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 = ' ' .. seterror( 'bad_pmid' );    -- set an error message    endendreturn externallinkid({link = handler.link, label = handler.label,        prefix=handler.prefix,id=id,separator=handler.separator, encode=handler.encode}) .. err_cat;end
--[[Determines if a PMC identifier's online version is embargoed. Compares the date in |embargo= against today's date.  If embargo date isin the future, returns true; otherwise, returns false because the embargo has expired or |embargo= not set in this cite.]]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 and tonumber( embargo_date ) >= tonumber( todays_date ) then    --is embargo date is in the future?        return true;    -- still embargoed    endendreturn false;            -- embargo expired or |embargo= not setend
--[[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 futurethe 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, thenthe PMC identifier is linked to the article through the link at cfg.id_handlers['PMC'].prefix.
PMCs are sequential numbers beginning at 1 and counting up.  This code checks the PMC to see that it contains only digits and is lessthan test_limit; the value in local variable test_limit will need to be updated periodically as more PMCs are issued.]]function pmc(id, embargo)local test_limit = 5000000;                            -- update this value as PMCs approachlocal handler = cfg.id_handlers['PMC'];local err_cat =  ;                                -- presume that PMC is validlocal text;
if id:match("[^%d]") then                            -- if PMC has anything but digits    err_cat = ' ' .. seterror( 'bad_pmc' );            -- set an error messageelse                                                -- 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 = ' ' .. seterror( 'bad_pmc' );        -- set an error message    endendif is_embargoed(embargo) then    text="" .. handler.label .. ":" .. handler.separator .. id .. err_cat;    --still embargoed so no external linkelse    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}) .. err_cat;endreturn 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.
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 = externallinkid({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 = ' ' .. seterror( 'bad_doi' );endreturn text .. inactive .. catend
-- 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' );endend
--[[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 fourdigits 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 linkThis 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 agreeswith the calculated value.  Incorrect length (8 digits), characters other than 0-9 and X, or checkdigit / calculated value mismatch will all cause a check issnerror 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 issn_copy = id;        -- save a copy of unadulterated issn; use this version for display if issn does not validatelocal 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 characterelse    valid_issn=is_valid_isxn(id, 8);                        -- validate issnend
if true == valid_issn then    id = string.sub( id, 1, 4 ) .. "-" .. string.sub( id, 5 );    -- if valid, display correctly formatted versionelse    id = issn_copy;                                            -- if not valid, use the show the invalid issn with error messageendtext = 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 invalidendreturn textend
--[[This function sets default title types (equivalent to the citation including |type=<default value>) for those citations that have defaults.Also handles the special case where it is desirable to omit the title type from the rendered citation (|type=none).]]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 valueend
if "AV-media-notes" == cite_class or "DVD-notes" == cite_class then        -- if this citation is cite AV media notes or cite DVD notes    return "Media notes";                    -- display AV media notes / DVD media notes annotation
elseif "podcast" == cite_class then            -- if this citation is cite podcast    return "Podcast";                        -- display podcast annotation
elseif "pressrelease" == cite_class then    -- if this citation is cite press release    return "Press release";                    -- display press release annotation
elseif "techreport" == cite_class then        -- if this citation is cite techreport    return "Technical report";                -- display techreport annotationelseif "thesis" == cite_class then            -- if this citation is cite thesis (degree option handled after this function returns)        return "Thesis";                    -- display simple thesis annotation (without |degree= modification)endend
--[[Determines whether a URL string is valid
At present the only check is whether the string appears tobe prefixed with a URI scheme.  It is not determined whetherthe URI scheme is valid or whether the URL is otherwise wellformed.]]function checkurl( url_str )-- Protocol-relative or URL schemereturn 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:BookSourcesfunction cleanisbn( isbn_str )return isbn_str:gsub( "[^-0-9X]", "" );end
-- Extract page numbers from external wikilinks in any of the |page=, |pages=, or |at= parameters for use in COinS.--TODO: Fix so this code supports urls like this:--    http://www.history.navy.mil/download/va125153.pdf#page=13 %w/:\.function get_coins_pages (pages)if not is_set (pages) then return pages; end            -- if no page numbers then we're donewhile 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 = pattern:gsub("([%^%$%(%)%%%.%[%]%*%+%-%?])", "%%%1");    -- pattern is not a literal string; escape lua's magic pattern characters    pages = pages:gsub(pattern, "");                    -- remove as many instances of pattern as possibleendpages = pages:gsub("[%[%]]", "");                        -- remove the bracketspages = pages:gsub("–", "-" );                            -- replace endashes with hyphenspages = pages:gsub("&%w+;", "-" );                        -- and replace html entities (– etc.) with hyphens; do we need to replace numerical entities like and the like?return pages;end
--[[ISBN-10 and ISSN validator code calculates checksum across all isbn/issn digits including the check digit. ISBN-13 is checked in checkisbn().If the number is valid the result will be 0. Before calling this function, issbn/issn must be checked for length and stripped of dashes,spaces and other non-isxn characters.]]function is_valid_isxn (isxn_str, len)local temp = 0;isxn_str = { isxn_str:byte(1, len) };    -- make a table of byteslen = len+1;                            -- adjust to be a loop counterfor i, v in ipairs( isxn_str ) do        -- loop through all of the bytes and calculate the checksum    if v == string.byte( "X" ) then        -- if checkdigit is X        temp = temp + 10*( len - i );    -- it represents 10 decimal    else        temp = temp + tonumber( string.char(v) )*(len-i);    endendreturn temp % 11 == 0;                    -- returns true if calculation result is zeroend
-- Determines whether an ISBN string is validfunction checkisbn( isbn_str )if nil ~= isbn_str:match("[^%s-0-9X]") then return false; end        -- fail if isbn_str contains anything but digits, hyphens, or the uppercase Xisbn_str = isbn_str:gsub( "-", "" ):gsub( " ", "" );    -- remove hyphens and spaceslocal len = isbn_str:len();if len ~= 10 and len ~= 13 then    return false;end
if len == 10 then    if isbn_str:match( "^%d*X?$" ) == nil then return false; end    return is_valid_isxn(isbn_str, 10);else    local temp = 0;    if isbn_str:match( "^97[89]%d*$" ) == nil then return false; end    -- isbn13 begins with 978 or 979    isbn_str = { isbn_str:byte(1, len) };    for i, v in ipairs( isbn_str ) do        temp = temp + (3 - 2*(i % 2)) * tonumber( string.char(v) );    end    return temp % 10 == 0;endend
-- Gets the display text for a wikilink like B or B gives Bfunction removewikilink( str )return (str:gsub( "%[%[([^%[%]]*)%]%]", function(l)    return l:gsub( "^[^|]*|(.*)$", "%1" ):gsub("^%s*(.-)%s*$", "%1");end));end
-- Escape sequences for content that will be used for URL descriptionsfunction safeforurl( str )if str:match( "%[%[.-%]%]" ) ~= nil then    table.insert( z.message_tail, { seterror( 'wikilink_in_url', {}, true ) } );endreturn str:gsub( '[%[%]\n]', {       ['['] = '[',    [']'] = ']',    ['\n'] = ' ' } );end
-- Converts a hyphen to a dashfunction 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 cannot use for italics, as the expected behavior foritalics 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', ' ' );endend
--[[Joins a sequence of strings together while checking for duplicate separation characters.
TODO: safejoin() has a flaw where it won't remove the duplicate character from a |title= / |url= combination.This is because by the time we get here, |title=http://somesite.com and |title=Document Title. have been combined:and Document Title.so that now, the last character is not sepc but is ] (unless sepc == ']' which breaks the external link)]]function safejoin( tbl, duplicate_char )--[[Note: we use string functions here, rather than ustring functions.This has considerably faster performance and should work correctly aslong as the duplicate_char is strict ASCII.  The stringsin 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;    endendreturn str;end 
-- Attempts to convert names to initials.function reducetoinitials(first)local initials = {}local i = 0;                                        -- counter for number of initialsfor word in string.gmatch(first, "%S+") do    table.insert(initials, string.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, quitendreturn 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.nameseplocal format = control.formatlocal maximum = control.maximumlocal lastauthoramp = control.lastauthoramp;local text = {}local etal = false;if sep:sub(-1,-1) ~= " " then sep = sep .. " " endif maximum ~= nil and maximum < 1 then return "", 0; endfor 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("—",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            if is_set(person.link) and nil ~= person.link:find("//") then one = one .. " " .. seterror( 'bad_authorlink' ) end    -- check for url in author link;        end        table.insert( text, one )        table.insert( text, sep_one )    endend
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;endlocal result = table.concat(text) -- construct listif etal then    local etal_text = cfg.messages['et al'];    result = result .. " " .. etal_text;end-- if necessary wrap result in tag to format in Small Capsif ( "scap" == format ) then result =    '' .. result .. '';endreturn result, countend
-- Generates a CITEREF anchor ID.function anchorid( options )return "CITEREF" .. table.concat( options );end
--[[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'tfind |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=.]]--Original functionfunction extractnames(args, list_name)local names = {};local i = 1;local last;while true dolast = selectone( args, cfg.aliases[list_name .. '-Last'], 'redundant_parameters', i );if not is_set(last) then-- just in case someone passed in an empty parameterbreak;endnames[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;endreturn names;end
--[[ Broken.  Editor CITEREF IDs are broken by this code (no editor list). Author CITEREF ID render correctlyfunction extractnames(args, list_name)local names = {};            -- table of nameslocal i = 1;                -- loop counter/indexerlocal 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 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    names[i] =                -- search through args for name components beginning at 1        {        last = selectone( args, cfg.aliases[list_name .. '-Last'], 'redundant_parameters', i ),        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 )        };    if names[i].first and not names[i].last then                            -- if there is a firstn without a matching lastn        names[i].first = nil;                                                -- set first to nil so we don't confuse the implicit et al message code        table.insert( z.message_tail, { seterror( 'first_missing_last', {err_msg_list_name, i}, true ) } );    -- add this error message        break;                                                                -- and done because lastn not found    elseif not names[i].first and not names[i].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                                                                    -- last with or without a first        if 1 == count then                                                    -- if the previous name was missing            table.insert( z.message_tail, { seterror( '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;                                                                -- bump to the next nameendreturn names;                                                                -- all done, return our list of namesend]]
-- Populates ID table from arguments using configuration settingsfunction 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; endendreturn 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 == 'ARXIV' then        table.insert( new_list, {handler.label, arxiv( v ) } );    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 = 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'] );    endendfunction comp( a, b )    -- used in following table.sort()    return a[1] < b[1];endtable.sort( new_list, comp );for k, v in ipairs( new_list ) do    new_list[k] = v[2];endreturn 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 stringif 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       endfor _, 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    endendif #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 ) } );endreturn value, selected;end
-- COinS metadata (see <http://ocoins.info/>) allows automated tools to parse-- the citation information.function COinS(data)if 'table' ~= type(data) or nil == next(data) then    return ;endlocal 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;endOCinSoutput["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;    endendlocal 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;    endendOCinSoutput.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 doing the majority of the citationformatting.]]function citation0( config, args)--[[Load Input ParametersThe argument_wrapper facilitates the mapping of multiplealiases to single internal variable.]]local A = argument_wrapper( args );
local ilocal 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 datalocal 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 Degree = A['Degree'];local Docket = A['Docket'];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'];
local Series = A['Series'];local Volume = A['Volume'];local Issue = A['Issue'];local Position = ;local Page = A['Page'];local Pages = hyphentodash( A['Pages'] );   local At = A['At'];
local Edition = A['Edition'];local PublicationPlace = A['PublicationPlace']local Place = A['Place'];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 );--[[ Hide unfinished cite newsgroup code so that long delayed update can take place-- special case for cite newsgroup which uses |id= for a usenet article or post id-- |id= is not included in COinS so here we convert it to an ID that will be included in COinSif ('newsgroup' == config.CitationClass) and (is_set (ID)) then    ID_list['USENETID']=ID;            -- add this new 'id' to the list of IDs    ID = ;                        -- and unsetend]]   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'];
--these are used by cite interviewlocal Callsign = A['Callsign'];local City = A['City'];local Cointerviewers = A['Cointerviewers'];            -- deprecatedlocal Interviewer = A['Interviewer'];                -- deprecatedlocal Program = A['Program'];
--local variables that are not cs1 parameterslocal page_type;                                    -- is this needed?  Doesn't appear to be used anywhere;local use_lowercase = ( sepc ~= '.' );local this_page = mw.title.getCurrentTitle();        --Also used for COinS and for languagelocal anchor_year;                                    -- used in the CITEREF identifierlocal COinS_date;                                    -- used in the COinS metadata
-- Set postscript default.if not is_set (PostScript) then                        -- if |postscript= has not been set (Postscript is nil which is the default for ) and    if (config.CitationClass ~= "citation") then    -- this template is not a citation template        PostScript = '.';                            -- must be a cite xxx template so set postscript to default (period)    endelse    if PostScript:lower() == 'none' then            -- if |postscript=none then        PostScript = ;                            -- no postscript    endend
--check this page to see if it is in one of the namespaces that cs1 is not supposed to add to the error categories.if not is_set(no_tracking_cats) then                -- ignore if we are already not going to categorize this page    for k, v in pairs( cfg.uncategorized_namespaces ) do    -- otherwise, spin through the list of namespaces we don't include in error categories        if this_page.nsText == v then                -- if we find one            no_tracking_cats = "true";                -- set no_tracking_cats            break;                                    -- and we're done        end    endend
-- check for extra |page=, |pages= or |at= parameters.if is_set(Page) then    if is_set(Pages) or is_set(At) then        Page = Page .. " " .. seterror('extra_pages');    -- add error message        Pages = ;                                        -- unset the others        At = ;    endelseif is_set(Pages) then    if is_set(At) then        Pages = Pages .. " " .. seterror('extra_pages');    -- add error messages        At = ;                                            -- unset    endend   
-- both |publication-place= and |place= (|location=) allowed if differentif not is_set(PublicationPlace) and is_set(Place) then    PublicationPlace = Place;                            -- promote |place= (|location=) to |publication-placeendif PublicationPlace == Place then Place = ; end        -- don't need both if they are the same--[[Parameter remapping for cite encyclopedia:When the citation has these parameters:|encyclopedia and |title then map |title to |article and |encyclopedia to |title|encyclopedia and |article then map |encyclopedia to |title|encyclopedia then map |encyclopedia to |title
|trans_title maps to |trans_chapter when |title is re-mapped
All other combinations of |encyclopedia, |title, and |article are not modified]]if ( config.CitationClass == "encyclopaedia" ) then    if is_set(Periodical) then                    -- Periodical is set when |encyclopedia is set        if is_set(Title) then            if not is_set(Chapter) then                Chapter = Title;                -- |encyclopedia and |title are set so map |title to |article and |encyclopedia to |title                TransChapter = TransTitle;                Title = Periodical;                Periodical = ;                -- redundant so unset                TransTitle = ;                -- redundant so unset            end        else                                    -- |title not set            Title = Periodical;                    -- |encyclopedia set and |article set or not set so map |encyclopedia to |title            Periodical = ;                    -- redundant so unset        end    endend
--special cases for citation.if (config.CitationClass == "citation") then        -- for citation templates    if not is_set (Ref) then                        -- if |ref= is not set        Ref = "harv";                                -- set default |ref=harv    end    if not is_set (sepc) then                        -- if |separator= is not set        sepc = ',';                                    -- set citation separator to its default (comma)    endelse                                                -- not a citation template    if not is_set (sepc) then                        -- if |separator= has not been set        sepc = '.';                                    -- set cite xxx separator to its default (period)    endend
-- check for special case where |separator=noneif 'none' == sepc:lower() then                        -- if |separator=none    sepc = ;                                        -- then set it to an empty stringend
-- Special case for cite techreport.if (config.CitationClass == "techreport") then    -- special case for cite techreport    if is_set(Issue) then                        -- cite techreport uses 'number', which other citations aliase to 'issue'        if not is_set(ID) then                    -- can we use ID for the "number"?            ID = Issue;                            -- yes, use it            Issue = "";                            -- unset Issue so that "number" isn't duplicated in the rendered citation or COinS metadata        else                                    -- can't use ID so emit error message            ID = ID .. " " .. seterror('redundant_parameters', '|id= and |number=');        end    end   end
-- special case for cite interviewif (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(Interviewer) then        if is_set(TitleType) then            Others = ' ' .. TitleType .. ' with ' .. Interviewer;            TitleType = ;        else            Others = ' ' .. 'Interview with ' .. Interviewer;        end        if is_set(Cointerviewers) then            Others = Others .. sepc .. ' ' .. Cointerviewers;        end    else        Others = '(Interview)';    endend
--Account for the oddity that is with |pmc= set and |url= not setif config.CitationClass == "journal" and not is_set(URL) and is_set(ID_list['PMC']) then    if not is_embargoed(Embargo) then        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=    endend
-- Account for the oddity that is , before generation of COinS data.--TODO: if this is only for , shouldn't we be checking? (if config.CitationClass=='conference' then ...)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.--[[    -- is not currently supported by this moduleif 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-- end of stuff]]
-- legacy: promote concatenation of |day=, |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;            local Day = A['Day']            if is_set(Day) then Date = Day .. " " .. Date end        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    endend
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 wherewe get the date used in the metadata.
Date validation supporting code is in Module:Citation/CS1/Date_validation]]anchor_year, COinS_date, error_message = dates({['accessdate']=AccessDate, ['airdate']=AirDate, ['archivedate']=ArchiveDate, ['date']=Date, ['doi_brokendate']=DoiBroken,    ['embargo']=Embargo, ['laydate']=LayDate, ['publicationdate']=PublicationDate, ['year']=Year});if is_set(error_message) then    table.insert( z.message_tail, { seterror( 'bad_date', {error_message}, true ) } );    -- add this error messageend
-- At this point fields may be nil if they weren't specified in the template use.  We can use that fact.
-- COinS metadata (see <http://ocoins.info/>) for-- automated parsing of citation information.local OCinSoutput = COinS{    ['Periodical'] = Periodical,    ['Chapter'] = Chapter,    ['Title'] = Title,    ['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(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,};
if is_set(Periodical) and not is_set(Chapter) and is_set(Title) then    Chapter = Title;    ChapterLink = TitleLink;    TransChapter = TransTitle;    Title = ;    TitleLink = ;    TransTitle = ;end--[[ Hide unfinished cite newsgroup code so that long delayed update can take place-- special case for cite newsgroup.  Do this after COinS because we are modifying Publishername and IDif 'newsgroup' == config.CitationClass then    if is_set (PublisherName) then        PublisherName = '[Newsgroup]: ' ..  externallink( 'news:' .. PublisherName, PublisherName );    endend]]
-- 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 messageend
local EditorCountif 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       endif  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 or cite podcast |url= is missing or empty    if inArray(config.CitationClass, {"web","podcast"}) 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' );    endend-- Test if citation has no titleif  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 ) } );endFormat = is_set(Format) and " (" .. Format .. ")" or "";local OriginalURL = URLDeadURL = DeadURL:lower();if is_set( ArchiveURL ) then    if ( DeadURL ~= "no" ) then        URL = ArchiveURL        URLorigin = A:ORIGIN('ArchiveURL')    endend-- Format chapter / article titleif is_set(Chapter) and is_set(ChapterLink) then    Chapter = "" .. Chapter .. "";endif is_set(Periodical) and is_set(Title) then    Chapter = wrap( 'italic-title', Chapter );    TransChapter = wrap( 'trans-italic-title', TransChapter );else    Chapter = kern_quotes (Chapter);                -- if necessary, separate chapter title's leading and trailing quote marks from Module provided quote marks    Chapter = wrap( 'quoted-title', Chapter );    TransChapter = wrap( 'trans-quoted-title', TransChapter );endlocal TransError = ""if is_set(TransChapter) then    if not is_set(Chapter) then        TransError = " " .. seterror( 'trans_missing_chapter' );    else        TransChapter = " " .. TransChapter;    endendChapter = 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-spaceelseif 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 .. ""endif is_set(Periodical) then    Title = kern_quotes (Title);                -- if necessary, separate title's leading and trailing quote marks from Module provided quote marks    Title = wrap( 'quoted-title', Title );    TransTitle = wrap( 'trans-quoted-title', TransTitle );--[[ Hide unfinished cite newsgroup code so that long delayed update can take placeelseif inArray(config.CitationClass, {"web","news","pressrelease","conference","podcast","newsgroup"}) and]]    elseif inArray(config.CitationClass, {"web","news","pressrelease","conference","podcast"}) and        not is_set(Chapter) then    Title = kern_quotes (Title);                -- if necessary, separate title's leading and trailing quote marks from Module provided quote marks    Title = wrap( 'quoted-title', Title );    TransTitle = wrap( 'trans-quoted-title', TransTitle );else    Title = wrap( 'italic-title', Title );    TransTitle = wrap( 'trans-italic-title', TransTitle );endTransError = "";if is_set(TransTitle) then    if not is_set(Title) then        TransError = " " .. seterror( 'trans_missing_title' );    else        TransTitle = " " .. TransTitle;    endendTitle = 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;    endendif is_set(Place) then    Place = " " .. wrap( 'written', Place, use_lowercase ) .. sepc .. " ";endif is_set(Conference) then    if is_set(ConferenceURL) then        Conference = externallink( ConferenceURL, Conference );    end    Conference = sepc .. " " .. Conferenceelseif is_set(ConferenceURL) then    Conference = sepc .. " " .. externallink( ConferenceURL, nil, ConferenceURLorigin );endif 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    endelse    Position = " " .. Position;    At = ;endif not is_set(Page) then    if is_set(Pages) then        if is_set(Periodical) and            not inArray(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    endelse    if is_set(Periodical) and        not inArray(config.CitationClass, {"encyclopaedia","web","book","news","podcast"}) then        Page = ": " .. Page;    else        Page = sepc .." " .. PPrefix .. Page;    endendAt = 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 = mw.language.fetchLanguageName( Language:lower(), "en" );    -- experiment: this seems to return correct ISO 639-1 language names    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 .. 'Category:Articles with ' .. name .. '-language external links' );    -- in main space and not English: categorize        else            Language=" " .. wrap( 'language', name );    --not in mainspace or language is English so don't categorize        end    endelse    Language="";    -- language not specified so make sure this is an empty string;end
Others = is_set(Others) and (sepc .. " " .. Others) or "";
-- handle type parameter for those CS1 citations that have default values
if inArray(config.CitationClass, {"AV-media-notes", "DVD-notes", "podcast", "pressrelease", "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";    endend
if is_set(TitleType) then                    -- if type parameter is specified    TitleType = " (" .. TitleType .. ")";    -- display it in parenthesesend
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) .. "";    endend
--[[ This code commented out while discussion continues until after week of 2014-03-23 live module update;if is_set(Volume) then    if ( mw.ustring.len(Volume) > 4 )      then Volume = sepc .. " " .. Volume;      else          Volume = " " .. hyphentodash(Volume) .. "";          if is_set(Series) then Volume = sepc .. Volume;          end    endend]]   ------------------------------------ totally unrelated data--[[ Loosely mimic template; Via parameter identifies a delivery source that is not the publisher; these sources often, but not always, existbehind 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' iselseif is_set(RegistrationRequired) then    SubscriptionRequired = sepc .. " " .. cfg.messages['registration']; --here when 'via' and 'subscription' parameters not used but 'registration' isend
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} ) .. ''endif is_set(ID) then ID = sepc .." ".. ID; end    if "thesis" == config.CitationClass and is_set(Docket) then    ID = sepc .." Docket ".. Docket .. 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 = "";                            -- CS1 does not supply terminal punctuation when |quote= is setendlocal Archivedif 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 } );    endelse    Archived = ""endlocal Layif 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 = "";endif is_set(Transcript) then    if is_set(TranscriptURL) then Transcript = externallink( TranscriptURL, Transcript ); endelseif is_set(TranscriptURL) then    Transcript = externallink( TranscriptURL, nil, TranscriptURLorigin );endlocal Publisher;if is_set(Periodical) and    not inArray(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( 'published', PublicationDate );        else            Publisher = PublicationDate;        end    end    if is_set(Publisher) then        Publisher = " (" .. Publisher .. ")";    endelse    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;    endend-- 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 )    endend
--[[Handle the oddity that is cite speech.  This code overrides whatever may be the value assigned to TitleNote (through |department=) and forces it to be " (Speech)" so thatthe 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    endend
-- 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 tcommonif 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 );endif #ID_list > 0 then    ID_list = safejoin( { sepc .. " ",  table.concat( ID_list, sepc .. " " ), ID }, sepc );else    ID_list = ID;endlocal 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 );    endendif is_set(PostScript) and PostScript ~= sepc then    text = safejoin( {text, sepc}, sepc );  --Deals with italics, spaces, etc.    text = text:sub(1,-sepc:len()-1);--        text = text:sub(1,-2);    --Remove final separator (assumes that sepc is only one character)end   text = safejoin( {text, PostScript}, sepc );
-- Now enclose the whole thing in a elementlocal options = {};if is_set(config.CitationClass) and config.CitationClass ~= "citation" then    options.class = "citation " .. config.CitationClass;else    options.class = "citation";endif 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        id = anchorid(names)    end    options.id = id;endif string.len(text:gsub("/]*>.-", ""):gsub("%b<>","")) <= 2 then    z.error_categories = {};    text = seterror('empty_citation');    z.message_tail = {};endif 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    endendno_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 .. 'Category:' .. v ..'';    endendreturn textend
-- This is used by templates such as to create the actual citation text.function z.citation(frame)local pframe = frame:getParent()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' );    dates = require('Module:Citation/CS1/Date_validation/sandbox').dates    -- ... sandbox version of date validation codeelse                                                                    -- otherwise    cfg = mw.loadData( 'Module:Citation/CS1/Configuration' );            -- load live versions of Configuration and Whitelist and ...    whitelist = mw.loadData( 'Module:Citation/CS1/Whitelist' );    dates = require('Module:Citation/CS1/Date_validation').dates        -- ... live version of date validation codeendlocal 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