Module:Footnotes/anchor id list

require('strict');local data = mw.loadData ('Module:Footnotes/anchor id list/data');local whitelist = mw.loadData ('Module:Footnotes/whitelist');local Lang_obj = mw.language.getContentLanguage();-- used by template_list_add() to uppercase first letter of template name TODO: better way to do that?local redirects_date = {['date'] = true,['datetomos'] = true,['formatdate'] = true,['isotodmymdy'] = true,['isotomos'] = true,}local redirects_patent = {-- special case cs1-like templates because uses different parameters for name and date in anchor ID['Cite patent'] = true,['Citeref patent'] = true,['Ref patent'] = true,}local redirects_sfnref = {['sfnref'] = true,['harvid'] = true,}local aliases_author = {-- these use pseudo-patterns in the same way as cs1|2; '#' represents 1 or more enumerator digits'last#','author#','surname#','author-last#','author#-last','subject#','host#',}local aliases_contributor = {'contributor#','contributor-last#','contributor#-last','contributor-surname#','contributor#-surname',}local aliases_editor = {'editor#','editor-last#','editor#-last','editor-surname#','editor#-surname',}local aliases_harvc_author = {'last#','author#',}local aliases_inventor = {-- cite patent'inventor#','inventor-last#','inventor#-last','inventor-surname#','inventor#-surname','invent#','invent-#',}local alias_patterns_date = {-- normal lua patterns for most cs1|2-like templates'|%s*year%s*=%s*','|%s*date%s*=%s*','|%s*publication%-?date%s*=%s*','|%s*air%-?date%s*=%s*',}local alias_patterns_harvc_date = {-- normal lua patterns for harvc template'|%s*anchor%-year%s*=%s*','|%s*year%s*=%s*',}local alias_patterns_patent_date = {-- normal lua patterns for cite patent templates'|%s*issue%-date%s*=%s*','|%s*gdate%s*=%s*','|%s*publication%-date%s*=%s*','|%s*pubdate%s*=%s*',}local patterns_date = {-- normal lua patterns--'(%d%d%d%d–%d%d%d%d%l?)$',-- YYYY–YYYY four-digit year range at end (Season YYYY–YYYY); with or without dab'(%d%d%d%d)%D+(%d%d%d%d%l?)$',-- any range with four-digit years; with or without dab; not two captures'^(%d%d%d%d–%d%d%l?)$',-- YYYY–YY two-digit year range; with or without dab'^(c%. %d%d%d%d?%l?)$',-- three- or four-digit circa year; with or without dab'(%d%d%d%d?%l?)$',-- three- or four-digit year at end of date (dmy or mdy); with or without dab'^(%d%d%d%d?%l?)',-- three- or four-digit year at beginning of date (ymd or YYYY); with or without dab'^(n%.d%.%l?)$',-- 'no date' with dots; with or without dab'^(nd%l?)$',-- 'no date' without dots; with or without dab}local patterns_tags = {'<nowiki>.-</nowiki>','<!%-%-.-%-%->','<pre>.-</pre>','<syntaxhighlight.->.-</syntaxhighlight>','<source.->.-</source>',-- deprecated alias of syntaxhighlight tag}local template_skip = {-- templates to be skipped for whatever reason; mostly because they resemble cs1-like templates['Citation-attribution'] = true,}local Article_content;local anchor_id_list = {};-- exported tableslocal template_list = {};local article_whitelist = {};--[[--------------------------< A R T I C L E _ C O N T E N T _ G E T >----------------------------------------get article content, remove certain html-like tags and their content so that this code doesn't include any citationtemplates inside the tags as valid tagets; they are not.]]local function article_content_get ()if not Article_content thenArticle_content = mw.title.getCurrentTitle():getContent() or '';-- get the content of the article or ''; new pages edited w/ve do not have 'content' until saved; ve does not preview; phab:T221625for _, tag in ipairs (patterns_tags) doArticle_content = Article_content:gsub (tag, '');-- remove certain html-like tags and their contentendendend--[[--------------------------< S F N R E F _ G E T >----------------------------------------------------------make an anchor id from the contents of {{sfnref}} or {{harvid}}.  this function assumes that {{sfnref}} and {{harvid}}are correctly formed.]]local function sfnref_get (template)template = template:gsub ('{{%s*(.-)%s*}}', '%1');-- strip bounding template markup and trimlocal parts = mw.text.split (template, '%s*|%s*');-- split at the pipe and remove extraneous space characterslocal anchor_id = {};if redirects_sfnref[parts[1]:lower()] thenanchor_id[1] = 'CITEREF';elsereturn nil;-- not an sfnref or harvid templateendlocal i = 2;-- indexer into parts{} tablelocal j = 2;-- indexer into anchor_id{} table which already has 'CITEREF' at [1]while parts[i] and 7 > j do-- loop through what should be just positional parameters for names and year (2-6 four names and a date)if not parts[i]:find ('=') then-- look for equal sign (named paraneter in a template that doesn't support named parameters)anchor_id[j] = parts[i];-- positional parameters are savedj = j+1;-- bump the anchor_id{} indexerendi = i+ 1;-- bump the parts{} indexerendreturn table.concat (anchor_id, '');end--[[--------------------------< D A T E _ G E T >--------------------------------------------------------------extract year from one of |year=, |date=, |publicationdate=, or |publication-date in that order.  Does not errorcheck (that is left to the cs1|2 templates to do)also gets date from |<date alias>={{date|...}}]]local function date_get (template, aliases)local rvalue;for _, pattern in ipairs (aliases) do-- spin through the date alias patternsrvalue = tostring(template):match (pattern);-- is this |<date alias>= used (tostring() because something makes match() think template is a table)if rvalue thenrvalue = tostring(template):match (pattern .. '(%b{})');-- is rvalue a template?if rvalue thenrvalue = rvalue:gsub ('{{%s*(.-)%s*}}', '%1');-- strip bounding template markup and trimlocal parts = mw.text.split (rvalue, '%s*|%s*');-- split at the pipe and remove extraneous space charactersif redirects_date[parts[1]:lower()] then-- if parts[1] names {{date}} or redirectrvalue = parts[2];-- assume that date template is properly formed, first positional parameter is the dateelsereturn '';-- |date= holds some other template than {{date}} or redirectendelservalue = template:match (pattern .. '([^|}]+)');if rvalue then-- if rvalue is somethingrvalue = mw.text.trim (rvalue);-- trim itendif not rvalue or '' == rvalue then-- if rvale was nothing or trimed to nothingrvalue = nil;-- ensure that it is unset so we can try the next parameter in the listendendif rvalue thenfor _, pattern in ipairs (patterns_date) do-- spin through the recognized date formats--date = rvalue:match (pattern);-- attempt to extract year portion according to the patternlocal date, date2 = rvalue:match (pattern);-- attempt to extract year portion according to the pattern; <date2> gets second year in any rangeif date thenif date2 then-- when a second yeardate = table.concat ({date, '–', date2});-- build a date rangeendreturn date;-- matched so return;endendbreak;-- found a date but it was malformed so abandonendendendreturn '';-- no date param or date param doesn't hold a recognized date; empty string for concatenationend --[[--------------------------< V N A M E S _ G E T >----------------------------------------------------------extract names from |vauthors= or |veditors=; there is no |vcontributors= parameter.splits the v parameter value at the comma; correctly handles accept-as-witten markup when used to wrap a comma-separated names (corporate)]]local function vnames_get (params, vparam)local vnames = {};-- first four author or editor names go herelocal split = {};-- temp table to assist in decoding accept-as-witten-markupif params[vparam] then-- test for |vauthors= or |veditor=split = mw.text.split (params[vparam], '%s*,%s*');-- this will separate portions of ((Black, Brown, White, an Co.))local i = 1;-- an indexerwhile split[i] doif split[i]:match ('^%(%(.*[^%)][^%)]$') then-- first segment of comma-separated accept-as-witten; this segment has the opening doubled parenslocal name = split[i];i=i+1;-- bump indexer to next segmentwhile split[i] doname = name .. ', ' .. split[i];-- concatenate with previous segmentsif split[i]:match ('^.*%)%)$') then-- if this table member has the closing doubled parensbreak;-- and done reassembling soendi=i+1;-- bump indexerendtable.insert (vnames, name);-- and add accept-as-witten name to the vnames tableelsetable.insert (vnames, split[i]);-- and add name to the vnames tableendi=i+1;-- bump indexerif 5 == i then break; end-- limit to four namesendfor i, vname in ipairs (vnames) doif not vname:match ('%(%(.-%)%)') then-- without accept-this-value-as-written markupvnames[i] = vname:gsub ('(.-)%s+%u+$', '%1');-- extract and save surname(s)endendfor i, vname in ipairs (vnames) do-- repeat, this time for accept-this-value-as-written markupvnames[i] = vname:gsub ('%(%((.-)%)%)', '%1');-- remove markup if present and save the whole nameendendreturn 0 ~= #vnames and table.concat (vnames) or nil-- return a concatenation of the vnames; nil elseend--[[--------------------------< N A M E S _ G E T >------------------------------------------------------------cs1|2 makes anchor id from contributor, author, or editor name-lists in that orderget the names from the cs1|2 template;  if there are no contributor names, try author names, then try editor names.returns concatenated names in enumeration order when successful; nil elseempty name (nameholding parameter n is present without value) and missing name (nameholding parameter n is notpresent) are included as empty string with all other names]]local function names_get (params, aliases_list)local names = {};-- first four author or editor names go herelocal enum_alias;-- alias with '#' replaced with a digitfor enum=1, 4 do-- four names onlyfor i, alias in ipairs (aliases_list) doif not names[enum] then-- hanven't found a previous alias with this [enum]? see if we can find this alias with this enumenum_alias = alias:gsub ('#', enum);-- replace '#' to make 'lastn'if 1 == enum then-- because |last= and last1= are exact aliasesif params[enum_alias] then-- test |last1= firstnames[enum] = params[enum_alias];-- found so save the value assigned to |last1=break;-- next enumelseenum_alias = alias:gsub ('#', '');-- replace '#' to make 'last'if params[enum_alias] thennames[enum] = params[enum_alias];-- found so save the value assigned to |last=break;-- next enumendendelse-- here for enum 2, 3, 4if params[enum_alias] thennames[enum] = params[enum_alias];-- found so save the value assigned to |lastn=break;-- next enumendendendendendfor enum=1, 4 do-- spin through the names table andlocal name = names[enum];if not name then-- when nameholding parameter n is not present (nil)name = '';-- convert to empty string for concatenationendname = name:gsub('%(%((.-)%)%)', '%1');-- remove accept-as-written markup if presentnames[enum] = name;-- save the modified nameendlocal name_str = table.concat (names);-- concatenate the namesreturn '' ~= name_str and name_str or nil;-- return the concatenation if not empty string; nil elseend--[[--------------------------< T E M P L A T E _ S T R I P >--------------------------------------------------removes the citation or havrc template's {{ and }} markup then removes, in whole, any templates found inside thecitation or harvc template.Templates are not allowed in parameters that are made part of COinS metadata; yet, they will appear.  cs1|2 doesnot see the template markup but instead sees the result of the template as html.  cs1|2 strips the html whichleaves the displayed value for the anchor id.  We can't do that here so, because templates aren't allowed inparameters, we simply discard any templates found in the cs1|2 template.this may leave a |lastn= parameter empty which will be treated as if it were really empty as cs1|2 do (three authors,|last2= empty -> CITEREFLast1Last3YYYY (the harv and sfn render: 'Last1, & Last3 YYYY' with CITEREFLast1Last3YYYY).]]local function template_strip (template)template = template:gsub ('^{{%s*', ''):gsub ('%s*}}$', '', 1);-- remove outer {{ and }} (cs1|2 template delimiters with trailing/leading whitespace)template = template:gsub ('%b{}', '');-- remove any templates from the cs1|2 templatereturn template;end--[[--------------------------< E S C A P E _ L U A _ M A G I C _ C H A R S >----------------------------------Returns a string where all of lua's magic characters have been escaped.  This is important because functions likestring.gsub() treat their pattern and replace strings as patterns, not literal strings.]]local function escape_lua_magic_chars (argument)argument = argument:gsub("%%", "%%%%");-- replace % with %%argument = argument:gsub("([%^%$%(%)%.%[%]%*%+%-%?])", "%%%1");-- replace all other lua magic pattern charactersreturn argument;end--[=[-------------------------< W I K I L I N K _ S T R I P >--------------------------------------------------Wikilink markup does not belong in an anchor id and can / does confuse the code that parses apart citation andharvc templates so here we remove any wiki markup:[[link|label]] -> label[[link]] -> link]=]local function wikilink_strip (template)for wikilink in template:gmatch ('%[%b[]%]') do-- get a wikilinktemplate = template:gsub ('%[%b[]%]', '__57r1P__', 1);-- install a markerif wikilink:match ('%[%[.-|(.-)%]%]') thenwikilink = wikilink:match ('%[%[.-|(.-)%]%]');-- extract label from complex [[link|label]] wikilinkelsewikilink = wikilink:match ('%[%[(.-)%]%]');-- extract link from simple [[link]] wikilinksendwikilink = escape_lua_magic_chars (wikilink);-- in case there are lua magic characters in wikilinktemplate = template:gsub ('__57r1P__', wikilink, 1);-- replace the marker with the appropriate textendreturn template;end--[[--------------------------< T E M P L A T E _ N A M E _ G E T >--------------------------------------------return the citation or harvc template's name; convert to lower case and trim leading and trailing whitespace;when the template is a sandbox the subpage portion of the template name is omitted from the returned template name{{Cite book/new |...}} returns cite book]]local function template_name_get (template)local template_name = template:match ('^{{%s*([^/|}]+)');-- get template name; ignore subpages ~/new, ~/sandbox; parser functionsif not template_name or template_name:match ('^#') then-- parser functions, magic words don't count as templatesreturn nil;-- could not get template name from (possibly corrupt) template; extraneous opening { mid template can cause this;end;template_name = template_name:gsub ('%s*$', '');-- trim trailing whitespace; leading whitespace already removedreturn Lang_obj:ucfirst (template_name);-- first character in template name must be uppercase (same as canonical template name) TODO: better way to do this?end--[[--------------------------< T E M P L A T E _ P A R A M S _ G E T >----------------------------------------parse apart a template's parameters and store in the params table where key is the parameter's name and value isthe parameter's value; empty parameters are not saved]]local function template_params_get (template, params_t)template = wikilink_strip (template);-- because piped wikilinks confuse code that builds params_t{} and because wikilinks not allowed in an anchor id-- strip templates after getting |ref= value because |ref={{sfnref}} and |ref={{harvid}} are allowedtemplate = template_strip (template);-- because template markup can confuse code that builds params_t{} and because templates in name parameters are not allowedlocal temp_t = mw.text.split (template, '%s*|%s*');--split on the pipefor _, param in ipairs (temp_t) doif param:find ('=', 1, true) then-- a named parameter?local k, v = param:match ('%s*([^=]-)%s*=%s*([^|}]+)');if v then-- there must be a valueif '' ~= v and not v:match ('^%s$') then-- skip when value is empty string or only whitespaceparams_t[k] = mw.text.trim (v);-- add trimmed value elseendendendendend--[[--------------------------< C I T E R E F _ M A K E _ H A R V C >------------------------------------------makes anchor_id from {{harvc}} or redirects]]local function anchor_id_make_harvc (template)local date = date_get (template, alias_patterns_harvc_date);-- get date; done here because might be in {{date}}; return date if valid; empty string elselocal anchor_id;local params = {};-- table of harvc parameterslocal id;-- custom anchor id for this {{harvc}} templateid = template:match ('|%s*id%s*=%s*(%b{})');-- in case |id={{sfnref}}; done here because templates will be strippedtemplate_params_get (template, params);-- build a table of template parameters and their values; this strips wikilinks and templatesif id then-- when set is {{sfnref}} or {{harvid}} templatereturn sfnref_get (id);-- returns content of {{sfnref}} or {{harvid}}; nil elseendif params.id then-- custom anchor for this {{harvc}} template (text)return params.id;-- |id= value as writtenendanchor_id = names_get (params, aliases_harvc_author);-- get the harvc contributor namesif anchor_id then-- if names were gottenreturn 'CITEREF' .. anchor_id .. date;endreturn nil;-- no names; no anchor_idend--[[--------------------------< A N C H O R _ I D _ M A K E _ W R A P P E R >----------------------------------for wrapper templatesinspect externally visible |ref= to decide what to do:|ref=- empty or missing: get names and date from whitelist defaults; override defaults from externally visible template parameters|ref=harv- same as empty or missing|ref={{SfnRef|name|name|name|name|year}}- assemble an anchor id from {{sfnref}} positional parameters|ref={{Harvid|name|name|name|name|year}}- assemble an anchor id from {{harvid}} positional parameters|ref=none- skip; do nothing because an anchor id intentionally suppressed; TODO: keep with a type code of '0'?|ref=<text>- save param value because may match an anchor id override value in {{harv}} template |ref= parameter or {{harvc}} |id= parameter]]local function anchor_id_make_wrapper (template)local ref;-- content of |ref=local template_name;-- name of the templatelocal anchor_id;-- the assembled anchor id from this templatelocal date;local name_default;local date_default;local vol;local params = {};-- table of template parameterstemplate_name = template_name_get (template);-- get first char uppercase trimmed template name; ignore subpages ~/new, ~/sandboxif not template_name or template_skip[template_name] thenreturn nil;-- could not extract template name from (possibly corrupted) template (extraneous opening { in the template will cause this)enddate = date_get (template, alias_patterns_date);-- get date; done here because might be in {{date}}--if '' == date then--date = whitelist.wrapper_templates[template_name][2] or '';-- no externally visible date so get default date--endref = template:match ('|%s*ref%s*=%s*(%b{})');-- first look for |ref={{sfnref}} or |ref={{harvid}} because we will strip templates from the wrapper templateif not ref thenif template:match ('|%s*ref%s*=([^|}]+)') then-- |ref={{template}} not found; if there is a |ref= param with an assigned valueref = template:match ('|%s*ref%s*=([^|}]+)');-- get the value; whitespace is a 'value'if ref then-- nil when |ref=|... or when |ref=}} (no spaces between assignment operator and pipe or closing brace)ref = mw.text.trim (ref);-- something, could be just whitespace, so trim leading / trailing whitespaceif '' == ref then-- trimming a string of whitespace makes an empty stringref = nil;-- make empty ref same as missing refendendendendtemplate_params_get (template, params);-- build a table of template parameters and their valuesif whitelist.wrapper_templates[template_name][1] then-- is this wrapper a simple-default wrapper?name_default = whitelist.wrapper_templates[template_name][1];-- get the default namesdate_default = whitelist.wrapper_templates[template_name][2];-- get the default dateelsevol = params['volume'] or 'default';if not whitelist.wrapper_templates[template_name][vol] then-- make sure this volume existsvol = 'default';-- doesn't exist, use default volumeendname_default = whitelist.wrapper_templates[template_name][vol][1];-- get the default namesdate_default = whitelist.wrapper_templates[template_name][vol][2];-- get the default dateendif 'harv' == ref  or not ref then-- |ref=harv specified or |ref= missing or emptyanchor_id = names_get (params, aliases_contributor) or-- get contributor, author, or editor namesnames_get (params, aliases_author) orvnames_get (params, 'vauthors') or-- |vauthors=names_get (params, aliases_editor) orvnames_get (params, 'veditors') or-- |veditors=name_default;-- default names from whitelist--whitelist.wrapper_templates[template_name][1];-- default names from whitelistif '' == date then-- if date not provided in the templatedate = date_default;-- use the default date from whitelistendif anchor_id then-- if names were gottenanchor_id = 'CITEREF' .. anchor_id .. date;endelseif ref:match ('%b{}') then-- ref holds a templateanchor_id = sfnref_get (ref);-- returns content of {{sfnref}} or {{harvid}}; nil elseelseif 'none' == ref then-- |ref=nonereturn nil;-- anchor id expicitly suppressedelseanchor_id = ref;-- |ref=<text> may match an anchor id override value in {{harv}} template |ref= parameterendreturn anchor_id;-- anchor_id text; nil elseend--[[--------------------------< A N C H O R _ I D _ M A K E _ C S 1 2 >----------------------------------------for cs1|2 template and cs1-like templatesinspect |ref= to decide what to do:|ref=- empty or missing: get names and date from template parameters; all cs1|2 create CITEREF anchor IDs|ref=harv- get names and date from template parameters|ref={{SfnRef|name|name|name|name|year}}- assemble an anchor id from {{sfnref}} positional parameters|ref={{Harvid|name|name|name|name|year}}- assemble an anchor id from {{harvid}} positional parameters|ref=none- skip; do nothing because an anchor id intentionally suppressed; TODO: keep with a type code of '0'?|ref=<text>- save param value because may match an anchor id override value in {{harv}} template |ref= parameter or {{harvc}} |id= parameter]]local function anchor_id_make_cs12 (template)local ref;-- content of |ref=local template_name;-- name of the templatelocal anchor_id;-- the assembled anchor id from this templatelocal date;local params = {};-- table of template parameterstemplate_name = template_name_get (template);-- get first char uppercase trimmed template name; ignore subpages ~/new, ~/sandboxif not template_name or template_skip[template_name] thenreturn nil;-- could not extract template name from (possibly corrupted) template (extraneous opening { in the template will cause this)endif redirects_patent[template_name] thendate = date_get (template, alias_patterns_patent_date);-- get date; done here because might be in {{date}} elsedate = date_get (template, alias_patterns_date);endref = template:match ('|%s*ref%s*=%s*(%b{})');-- first look for |ref={{sfnref}} or |ref={{harvid}} because we will strip templates from the cs1|2 templateif not ref thenif template:match ('|%s*ref%s*=([^|}]+)') then-- |ref={{template}} not found; if there is a |ref= param with an assigned valueref = template:match ('|%s*ref%s*=([^|}]+)');-- get the value; whitespace is a 'value'if ref then-- nil when |ref=|... or when |ref=}} (no spaces between assignment operator and pipe or closing brace)ref = mw.text.trim (ref);-- something, could be just whitespace, so trim leading / trailing whitespaceif '' == ref then-- trimming a string of whitespace makes an empty stringref = nil;-- make empty ref same as missing refendendendendtemplate_params_get (template, params);-- build a table of template parameters and their valuesif not ref then-- |ref= not set, might be cite LSA which doesn't support |ref=if 'cite lsa' == template_name thenreturn 'CITEREF' .. (params.last or '') .. (params.year or '');-- cite LSA always creates an anchor id using only |last= and |year= (no aliases)endendif 'harv' == ref  or not ref then-- |ref=harv specified or |ref= missing or emptyif redirects_patent[template_name] then-- if this is a cite patent templateanchor_id = names_get (params, aliases_inventor);-- inventor names onlyelse-- cs1|2 templateanchor_id = names_get (params, aliases_contributor) or-- get contributor, author, or editor namesnames_get (params, aliases_author) orvnames_get (params, 'vauthors') or-- |vauthors=names_get (params, aliases_editor) orvnames_get (params, 'veditors');-- |veditors=endif anchor_id then-- if names were gottenanchor_id = 'CITEREF' .. anchor_id .. date;endelseif ref:match ('%b{}') then-- ref holds a templateanchor_id = sfnref_get (ref);-- returns content of {{sfnref}} or {{harvid}}; nil elseelseif 'none' == ref and not redirects_patent[template_name] then-- |ref=none; not supported by cite patentreturn nil;-- anchor id expicitly suppressedelseanchor_id = ref;-- |ref=<text> may match an anchor id override value in {{harv}} template |ref= parameterendreturn anchor_id;-- anchor_id text; nil elseend--[[--------------------------< L I S T _ A D D >--------------------------------------------------------------adds an <item> to <list> table; for anchor IDs, the boolean <encode> argument must be set true; no return value]]local function list_add (item, list, encode)if item then-- if there was an itemif encode then-- for anchor IDs ...item = mw.uri.anchorEncode (item);-- encode to remove wikimarkup, convert spaces to underscores etcendif not list[item] then-- if not already savedlist[item] = 1;-- save it else-- here when this item already savedlist[item] = list[item] + 1;-- to indicate that there are multiple itemsendendend--[[--------------------------< A N C H O R _ I D _ M A K E _ A N C H O R >------------------------------------make anchor IDs from {{anchor}}; there may be more than one because {{anchor}} is not limited to the number ofanchors it may hold.]]local function anchor_id_make_anchor (template, anchor_id_list)template = template:gsub ('^{{[^|]+|', ''):gsub ('}}$', '', 1);-- remove outer {{ and }} and template nametemplate = wikilink_strip (template);-- strip any wikilink markup (there shouldn't be any but just in case)local params = {};local anchor_id;for param in template:gmatch ('%b{}') do-- loop through the template; remove and save templates (presumed to be sfnref or harvid)table.insert (params, param);-- save ittemplate = template:gsub ('%b{}', '', 1);-- remove it from source templateendfor _, t in ipairs (params) do-- spin through the templates in paramsanchor_id = sfnref_get (t);-- attempt to decode {{sfnref}} and {{harvid}}if anchor_id then-- nil when not {{sfnref}} or {{harvid}}list_add (anchor_id, anchor_id_list, true);-- add anchor ID to the listendendtemplate = template:gsub ('|%s*|', '|');-- when pipe follows pipe with or without white space, remove extraneous pipetemplate = template:gsub ('^|', ''):gsub('|$', '');-- remove extraneous leading and trailing pipesparams = mw.text.split (template, '%s*|%s*');-- split at the pipe and remove extraneous space charactersfor _, t in ipairs (params) do-- spin through the anchor IDsanchor_id = mw.text.trim (t);-- trim white spaceif '' ~= anchor_id then-- should always have somethinglist_add (anchor_id, anchor_id_list, true);-- add anchor ID to the listendendend--[[--------------------------< T E M P L A T E _ L I S T _ A D D >--------------------------------------------makes a list of templates use in the article.]]local function template_list_add (template)local template = template:match ('{{%s*(.-)[|}]');-- keep the case of the template - this is different from template_name_get()if template and not template:match ('^#') then-- found a template or magic word; ignore magic wordstemplate=mw.text.trim (template);-- trim whitespacetemplate = Lang_obj:ucfirst (template);-- first character in template name must be uppercase (same as canonical template name) TODO: better way to do this?list_add (template, template_list);-- add to list with (unused) tallyendend--[[--------------------------< A N C H O R _ I D _ L I S T _ M A K E >----------------------------------------makes a list of anchor ids from cs1|2, cs1|2-like, vcite xxx, harvc, anchor, wikicite templatesBecause cs1|2 wrapper templates can, and often do, hide the author and date parameters inside the wrapper,these parameters are not available in the article's wikisource so {{harv}}, {{sfn}}, and {{harvc}} templates thatlink correctly to those wrapper templates will incorrectly show error messages.  Use |ignore-err=yes in the {{harv}},{{sfn}}, and {{harvc}} templates to supress the error message.creates a list of templates used in the article for use with the whitelistcreates a list of article-local whitelisted anchor IDs from {{sfn whitelist}}]]local function anchor_id_list_make ()article_content_get ();-- attempt to get this article's contentif '' == Article_content then-- when there is no article contentreturn '';-- no point in continuingendlocal template;-- place to hold the template that we foundlocal template_name;local anchor_id;-- place to hold an anchor id as it is extracted / decodedlocal find_pattern = '%f[{]{{[^{]';local tstart, tend = Article_content:find (find_pattern);-- find the first template; do not find template variables: {{{template var|}}} while tstart dotemplate = Article_content:match ('%b{}', tstart);-- get the whole templateif not template thenbreak;-- template is nil for some reason (last template missing closing }} for example) so declare ourselves doneendtemplate_name = template_name_get (template);-- get first char uppercase trimmed template name; ignore subpages ~/new, ~/sandboxtemplate_list_add (template);-- add this template's name to the listif data.known_templates_cs12 [template_name] thenanchor_id = anchor_id_make_cs12 (template);-- extract an anchor id from this templatelist_add (anchor_id, anchor_id_list, true)elseif data.known_templates_vcite [template_name] thenlocal ref = template:match ('|%s*ref%s*=%s*(%b{})');-- first look for |ref={{sfnref}} or |ref={{harvid}} because we will strip templates from the vcite templateif ref then-- |ref={{template}}anchor_id = sfnref_get (ref);-- returns content of {{sfnref}} or {{harvid}}; nil elselist_add (anchor_id, anchor_id_list, true);elselocal params = {};template_params_get (template, params);-- build a table of template parameters and their valuesanchor_id = params['ref'];-- when both set, vcite uses value from |ref=if not anchor_id and params['harvid'] thenanchor_id = 'CITEREF' .. params['harvid'];-- in vcite, |harvid= auto-adds 'CITEREF' prefix to the value in |harvid=endlist_add (anchor_id, anchor_id_list, true);endelseif data.known_templates_harvc [template_name] thenanchor_id = anchor_id_make_harvc (template);-- extract an anchor id from this templatelist_add (anchor_id, anchor_id_list, true);elseif data.known_templates_wikicite [template_name] thenlocal ref = template:match ('|%s*ref%s*=%s*(%b{})');-- first look for |ref={{sfnref}} or |ref={{harvid}}if ref thenanchor_id = sfnref_get (ref);elseif template:match ('|%s*ref%s*=([^|}]+)') thenanchor_id = template:match ('|%s*ref%s*=([^|}]+)');-- plain-textelseif template:match ('|%s*id%s*=%s*(%b{})') thenref = template:match ('|%s*id%s*=%s*(%b{})');anchor_id = 'Reference-' .. sfnref_get (ref);elseif template:match ('|%s*id%s*=([^|}]+)') thenanchor_id = 'Reference-' .. template:match ('|%s*id%s*=([^|}]+)');-- plain-textelseanchor_id = nil;-- no matches, ensure that anchor_id has no valueendif anchor_id thenlist_add (anchor_id, anchor_id_list, true);endelseif data.known_templates_anchor [template_name] thenanchor_id_make_anchor (template, anchor_id_list);-- extract anchor ids from this template if anyelseif data.known_templates_sfn_whitelist [template_name] thentemplate = template:gsub ('^{{[^|]+|', ''):gsub ('}}$', '', 1);-- remove outer {{ and }} and template nametemplate = mw.text.trim (template, '%s|');-- trim leading trailing white space and pipestemplate = mw.text.split (template, '%s*|%s*');-- make a table of the template's parametersfor _, anchor_id in ipairs (template) do-- spin through this template's parameterif '' ~= anchor_id and not article_whitelist[anchor_id] thenanchor_id = mw.uri.anchorEncode (anchor_id)article_whitelist[anchor_id] = 1;-- add to the whitelistendendelseif template_name and whitelist.wrapper_templates[template_name] thenanchor_id = anchor_id_make_wrapper (template);-- extract an anchor id from this template if possiblelist_add (anchor_id, anchor_id_list, true);elseif template_name and template_name:match ('^Cit[ea]') then-- not known, not known wrapper; last gasp, try as cs1-likeanchor_id = anchor_id_make_cs12 (template);-- extract an anchor id from this template if possiblelist_add (anchor_id, anchor_id_list, true);endtstart, tend = Article_content:find (find_pattern, tend);-- search for another template; begin at end of last searchendmw.logObject (anchor_id_list, 'anchor_id_list');mw.logObject (template_list, 'template_list');mw.logObject (article_whitelist, 'article_whitelist');return anchor_id_list;end--[[--------------------------< E X P O R T E D _ T A B L E S >------------------------------------------------]]return {anchor_id_list = anchor_id_list_make(),-- table of anchor ids available in this articlearticle_whitelist = article_whitelist,-- table of anchor ids with false-positive error message to be suppressedtemplate_list = template_list,-- table of templates used in this article}