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*', } 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?)$',													-- YYYY–YYYY four-digit year range at end (Season YYYY–YYYY); with or without dab '^(%d%d%d%d–%d%d%l?)$',														-- 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 = { ' .- ',	'<!%-%-.-%-%->',	' .- ',	' ',	' ',													-- 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 tables local 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 citation templates inside the tags as valid tagets; they are not.

]]

local function article_content_get if not Article_content then Article_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:T221625 for _, tag in ipairs (patterns_tags) do			Article_content = Article_content:gsub (tag, '');					-- remove certain html-like tags and their content end end end

--[[--< S F N R E F _ G E T >--

make an anchor id from the contents of or. this function assumes that and are correctly formed.

]]

local function sfnref_get (template) template = template:gsub ('', '%1');							-- strip bounding template markup and trim local parts = mw.text.split (template, '%s*|%s*');							-- split at the pipe and remove extraneous space characters local anchor_id = {};

if redirects_sfnref[parts[1]:lower] then anchor_id[1] = 'CITEREF'; else return nil;																-- not an sfnref or harvid template end local i = 2;																-- indexer into parts{} table local 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 saved j = j+1;															-- bump the anchor_id{} indexer end i = i+ 1;																-- bump the parts{} indexer end

return 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 error check (that is left to the cs1|2 templates to do)

also gets date from | =...

]]

local function date_get (template, aliases) local date; local rvalue;

for _, pattern in ipairs (aliases) do										-- spin through the date alias patterns rvalue = tostring(template):match (pattern);							-- is this | = used (tostring because something makes match think template is a table) if rvalue then rvalue = tostring(template):match (pattern .. '(%b{})');			-- is rvalue a template? if rvalue then rvalue = rvalue:gsub ('', '%1');					-- strip bounding template markup and trim local parts = mw.text.split (rvalue, '%s*|%s*');				-- split at the pipe and remove extraneous space characters

if redirects_date[parts[1]:lower] then						-- if parts[1] names or redirect rvalue = parts[2];											-- assume that date template is properly formed, first positional parameter is the date else return '';													-- |date= holds some other template than or redirect end else rvalue = template:match (pattern .. '([^|}]+)'); if rvalue then													-- if rvalue is something rvalue = mw.text.trim (rvalue);								-- trim it				end if not rvalue or '' == rvalue then								-- if rvale was nothing or trimed to nothing rvalue = nil;												-- ensure that it is unset so we can try the next parameter in the list end end

if rvalue then for _, pattern in ipairs (patterns_date) do						-- spin through the recognized date formats date = rvalue:match (pattern);								-- attempt to extract year portion according to the pattern if date then return date;											-- matched so return; end end break;															-- found a date but it was malformed so abandon end end end

return '';																	-- no date param or date param doesn't hold a recognized date; empty string for concatenation end

--[[--< 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 here local split = {};															-- temp table to assist in decoding accept-as-witten-markup

if 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 indexer while split[i] do			if split[i]:match ('^%(%(.*[^%)][^%)]$') then						-- first segment of comma-separated accept-as-witten; this segment has the opening doubled parens local name = split[i]; i=i+1;															-- bump indexer to next segment while split[i] do name = name .. ', ' .. split[i];							-- concatenate with previous segments if split[i]:match ('^.*%)%)$') then							-- if this table member has the closing doubled parens break;													-- and done reassembling so					end i=i+1;														-- bump indexer end table.insert (vnames, name);									-- and add accept-as-witten name to the vnames table else table.insert (vnames, split[i]);								-- and add name to the vnames table end i=i+1;																	-- bump indexer if 5 == i then break; end												-- limit to four names end

for i, vname in ipairs (vnames) do			if not vname:match ('%(%(.-%)%)') then								-- without accept-this-value-as-written markup vnames[i] = vname:gsub ('(.-)%s+%u+$', '%1');					-- extract and save surname(s) end end for i, vname in ipairs (vnames) do										-- repeat, this time for accept-this-value-as-written markup vnames[i] = vname:gsub ('%(%((.-)%)%)', '%1');						-- remove markup if present and save the whole name end end

return 0 ~= #vnames and table.concat (vnames) or nil						-- return a concatenation of the vnames; nil else end

--[[--< N A M E S _ G E T >

cs1|2 makes anchor id from contributor, author, or editor name-lists in that order

get 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 else

empty name (nameholding parameter n is present without value) and missing name (nameholding parameter n is not present) 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 here local enum_alias;															-- alias with '#' replaced with a digit

for enum=1, 4 do															-- four names only for i, alias in ipairs (aliases_list) do if not names[enum] then												-- hanven't found a previous alias with this [enum]? see if we can find this alias with this enum enum_alias = alias:gsub ('#', enum);							-- replace '#' to make 'lastn' if 1 == enum then												-- because |last= and last1= are exact aliases if params[enum_alias] then									-- test |last1= first names[enum] = params[enum_alias];						-- found so save the value assigned to |last1= break;													-- next enum else enum_alias = alias:gsub ('#', '');						-- replace '#' to make 'last' if params[enum_alias] then names[enum] = params[enum_alias];					-- found so save the value assigned to |last= break;												-- next enum end end else															-- here for enum 2, 3, 4 if params[enum_alias] then names[enum] = params[enum_alias];						-- found so save the value assigned to |lastn= break;													-- next enum end end end end end

for enum=1, 4 do															-- spin through the names table and local name = names[enum]; if not name then														-- when nameholding parameter n is not present (nil) name = '';															-- convert to empty string for concatenation end name = name:gsub('%(%((.-)%)%)', '%1');									-- remove accept-as-written markup if present names[enum] = name;														-- save the modified name end

local name_str = table.concat (names);										-- concatenate the names return '' ~= name_str and name_str or nil;									-- return the concatenation if not empty string; nil else end

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

removes the citation or havrc template's 🇦🇩 markup then removes, in whole, any templates found inside the citation or harvc template.

Templates are not allowed in parameters that are made part of COinS metadata; yet, they will appear. cs1|2 does not see the template markup but instead sees the result of the template as html. cs1|2 strips the html which leaves the displayed value for the anchor id. We can't do that here so, because templates aren't allowed in parameters, 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 ('^$', '', 1);					-- remove outer 🇦🇩 (cs1|2 template delimiters) template = template:gsub ('%b{}', '');										-- remove any templates from the cs1|2 template return 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 like string.gsub treat their pattern and replace strings as patterns, not literal strings. ]]

local function escape_lua_magic_chars (argument) argument = argument:gsub("%%", "%%%%");										-- replace % with %% argument = argument:gsub("([%^%$%(%)%.%[%]%*%+%-%?])", "%%%1");				-- replace all other lua magic pattern characters return argument; end

--[=[-< 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 and harvc templates so here we remove any wiki markup: label -> label link -> link ]=]

local function wikilink_strip (template) for wikilink in template:gmatch ('%[%b[]%]') do								-- get a wikilink template = template:gsub ('%[%b[]%]', '__57r1P__', 1);					-- install a marker if wikilink:match ('%[%[.-|(.-)%]%]') then wikilink = wikilink:match ('%[%[.-|(.-)%]%]');						-- extract label from complex label wikilink else wikilink = wikilink:match ('%[%[(.-)%]%]');							-- extract link from simple link wikilinks end wikilink = escape_lua_magic_chars (wikilink);							-- in case there are lua magic characters in wikilink template = template:gsub ('__57r1P__', wikilink, 1);					-- replace the marker with the appropriate text end

return 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 returns cite book

]]

local function template_name_get (template) local template_name = template:match ('^{{%s*([^/|}]+)');					-- get template name; ignore subpages ~/new, ~/sandbox; parser functions

if not template_name or template_name:match ('^#') then						-- parser functions, magic words don't count as templates return 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 removed return 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 is the parameter's value; empty parameters are not saved

]]

local function template_params_get (template, params) template = wikilink_strip (template);										-- because piped wikilinks confuse code that builds params{} and because wikilinks not allowed in an anchor id																				-- strip templates after getting |ref= value because |ref= and |ref= are allowed template = template_strip (template);										-- because template markup can confuse code that builds params{} and because templates in name parameters are not allowed

template = template:gsub ('|%s*|', '|');									-- when pipe follows pipe with or without white space, remove extraneous pipe

for param, value in template:gmatch ('|%s*([^=]-)%s*=%s*([^|}]+)') do		-- build a table of template parameters and their values if value then															-- there must be a value if '' ~= value and not value:match ('^%s$') then					-- skip when value is empty string or only whitespace params[param] = mw.text.trim (value);							-- add trimmed value else end end end end

--[[--< C I T E R E F _ M A K E _ H A R V C >--

makes anchor_id from 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 ; return date if valid; empty string else local anchor_id; local params = {};															-- table of harvc parameters local id;																	-- custom anchor id for this template

id = template:match ('|%s*id%s*=%s*(%b{})');								-- in case |id=; done here because templates will be stripped

template_params_get (template, params);										-- build a table of template parameters and their values; this strips wikilinks and templates

if id then																	-- when set is or  template return sfnref_get (id);													-- returns content of or ; nil else end if params.id then															-- custom anchor for this template (text) return params.id;														-- |id= value as written end anchor_id = names_get (params, aliases_harvc_author);						-- get the harvc contributor names

if anchor_id then															-- if names were gotten return 'CITEREF' .. anchor_id .. date; end return nil;																	-- no names; no anchor_id end

--[[--< A N C H O R _ I D _ M A K E _ W R A P P E R >--

for wrapper templates

inspect 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=	- assemble an anchor id from positional parameters |ref=	- assemble an anchor id from positional parameters |ref=none									- skip; do nothing because an anchor id intentionally suppressed; TODO: keep with a type code of '0'? |ref= 									- save param value because may match an anchor id override value in template |ref= parameter or  |id= parameter

]]

local function anchor_id_make_wrapper (template) local ref;																	-- content of |ref= local template_name;														-- name of the template local anchor_id;															-- the assembled anchor id from this template local date; local name_default; local date_default; local vol; local params = {};															-- table of template parameters template_name = template_name_get (template);								-- get first char uppercase trimmed template name; ignore subpages ~/new, ~/sandbox if not template_name or template_skip[template_name] then return nil;																-- could not extract template name from (possibly corrupted) template (extraneous opening { in the template will cause this) end

date = date_get (template, alias_patterns_date);							-- get date; done here because might be in --	if '' == date then --		date = whitelist.wrapper_templates[template_name][2] or '';				-- no externally visible date so get default date --	end

ref = template:match ('|%s*ref%s*=%s*(%b{})');								-- first look for |ref= or |ref= because we will strip templates from the wrapper template if not ref then if template:match ('|%s*ref%s*=([^|}]+)') then							-- |ref= not found; if there is a |ref= param with an assigned value ref = 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 whitespace if '' == ref then												-- trimming a string of whitespace makes an empty string ref = nil;													-- make empty ref same as missing ref end end end end

template_params_get (template, params);										-- build a table of template parameters and their values

if 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 names date_default = whitelist.wrapper_templates[template_name][2];			-- get the default date else vol = params['volume'] or 'default'; if not whitelist.wrapper_templates[template_name][vol] then				-- make sure this volume exists vol = 'default';													-- doesn't exist, use default volume end name_default = whitelist.wrapper_templates[template_name][vol][1];		-- get the default names date_default = whitelist.wrapper_templates[template_name][vol][2];		-- get the default date end

if 'harv' == ref or not ref then											-- |ref=harv specified or |ref= missing or empty anchor_id = names_get (params, aliases_contributor) or					-- get contributor, author, or editor names names_get (params, aliases_author) or			vnames_get (params, 'vauthors') or									-- |vauthors= names_get (params, aliases_editor) or			vnames_get (params, 'veditors') or									-- |veditors= name_default;														-- default names from whitelist --			whitelist.wrapper_templates[template_name][1];						-- default names from whitelist

if '' == date then														-- if date not provided in the template date = date_default;												-- use the default date from whitelist end

if anchor_id then														-- if names were gotten anchor_id = 'CITEREF' .. anchor_id .. date; end

elseif ref:match ('%b{}') then												-- ref holds a template anchor_id = sfnref_get (ref);											-- returns content of or ; nil else

elseif 'none' == ref then													-- |ref=none return nil;																-- anchor id expicitly suppressed else anchor_id = ref;														-- |ref= may match an anchor id override value in template |ref= parameter end return anchor_id;															-- anchor_id text; nil else end

--[[--< A N C H O R _ I D _ M A K E _ C S 1 2 >

for cs1|2 template and cs1-like templates

inspect |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=	- assemble an anchor id from positional parameters |ref=	- assemble an anchor id from positional parameters |ref=none									- skip; do nothing because an anchor id intentionally suppressed; TODO: keep with a type code of '0'? |ref= 									- save param value because may match an anchor id override value in template |ref= parameter or  |id= parameter

]]

local function anchor_id_make_cs12 (template) local ref;																	-- content of |ref= local template_name;														-- name of the template local anchor_id;															-- the assembled anchor id from this template local date; local params = {};															-- table of template parameters template_name = template_name_get (template);								-- get first char uppercase trimmed template name; ignore subpages ~/new, ~/sandbox if not template_name or template_skip[template_name] then return nil;																-- could not extract template name from (possibly corrupted) template (extraneous opening { in the template will cause this) end

if redirects_patent[template_name] then date = date_get (template, alias_patterns_patent_date);					-- get date; done here because might be in 	else date = date_get (template, alias_patterns_date); end ref = template:match ('|%s*ref%s*=%s*(%b{})');								-- first look for |ref= or |ref= because we will strip templates from the cs1|2 template if not ref then if template:match ('|%s*ref%s*=([^|}]+)') then							-- |ref= not found; if there is a |ref= param with an assigned value ref = 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 whitespace if '' == ref then												-- trimming a string of whitespace makes an empty string ref = nil;													-- make empty ref same as missing ref end end end end

template_params_get (template, params);										-- build a table of template parameters and their values

if not ref then																-- |ref= not set, might be cite LSA which doesn't support |ref= if 'cite lsa' == template_name then return 'CITEREF' .. (params.last or '') .. (params.year or '');		-- cite LSA always creates an anchor id using only |last= and |year= (no aliases) end end

if 'harv' == ref or not ref then											-- |ref=harv specified or |ref= missing or empty if redirects_patent[template_name] then									-- if this is a cite patent template anchor_id = names_get (params, aliases_inventor);					-- inventor names only else																	-- cs1|2 template anchor_id = names_get (params, aliases_contributor) or				-- get contributor, author, or editor names names_get (params, aliases_author) or				vnames_get (params, 'vauthors') or								-- |vauthors= names_get (params, aliases_editor) or				vnames_get (params, 'veditors');								-- |veditors= end

if anchor_id then														-- if names were gotten anchor_id = 'CITEREF' .. anchor_id .. date; end

elseif ref:match ('%b{}') then												-- ref holds a template anchor_id = sfnref_get (ref);											-- returns content of or ; nil else

elseif 'none' == ref and not redirects_patent[template_name] then			-- |ref=none; not supported by cite patent return nil;																-- anchor id expicitly suppressed else anchor_id = ref;														-- |ref= may match an anchor id override value in template |ref= parameter end return anchor_id;															-- anchor_id text; nil else end

--[[--< L I S T _ A D D >--

adds an to table; for anchor IDs, the boolean argument must be set true; no return value

]]

local function list_add (item, list, encode) if item then																-- if there was an item if encode then															-- for anchor IDs ... item = mw.uri.anchorEncode (item);									-- encode to remove wikimarkup, convert spaces to underscores etc end if not list[item] then													-- if not already saved list[item] = 1;														-- save it 		else																	-- here when this item already saved list[item] = list[item] + 1;										-- to indicate that there are multiple items end end end

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

make anchor IDs from ; there may be more than one because is not limited to the number of anchors it may hold.

]]

local function anchor_id_make_anchor (template, anchor_id_list) template = template:gsub ('^$', '', 1);				-- remove outer 🇦🇩 and template name

template = 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 it		template = template:gsub ('%b{}', '', 1);								-- remove it from source template end for _, t in ipairs (params) do												-- spin through the templates in params anchor_id = sfnref_get (t);												-- attempt to decode and if anchor_id then														-- nil when not or 			list_add (anchor_id, anchor_id_list, true);							-- add anchor ID to the list end end template = template:gsub ('|%s*|', '|');									-- when pipe follows pipe with or without white space, remove extraneous pipe template = template:gsub ('^|', ):gsub('|$', );							-- remove extraneous leading and trailing pipes

params = mw.text.split (template, '%s*|%s*');								-- split at the pipe and remove extraneous space characters for _, t in ipairs (params) do												-- spin through the anchor IDs anchor_id = mw.text.trim (t);											-- trim white space if '' ~= anchor_id then													-- should always have something list_add (anchor_id, anchor_id_list, true);							-- add anchor ID to the list end end end

--[[--< 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 words template=mw.text.trim (template);										-- trim whitespace template = 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) tally end end

--[[--< 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 templates

Because 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, , and templates that link correctly to those wrapper templates will incorrectly show error messages. Use |ignore-err=yes in the , , and templates to supress the error message.

creates a list of templates used in the article for use with the whitelist

creates a list of article-local whitelisted anchor IDs from

]]

local function anchor_id_list_make article_content_get ;														-- attempt to get this article's content

if '' == Article_content then												-- when there is no article content return '';																-- no point in continuing end local template;																-- place to hold the template that we found local template_name; local anchor_id;															-- place to hold an anchor id as it is extracted / decoded

local find_pattern = '%f[{]{{[^{]'; local tstart, tend = Article_content:find (find_pattern);					-- find the first template; do not find template variables: {{{template var|}}}

while tstart do		template = Article_content:match ('%b{}', tstart);						-- get the whole template if not template then break;																-- template is nil for some reason (last template missing closing }} for example) so declare ourselves done end

template_name = template_name_get (template);							-- get first char uppercase trimmed template name; ignore subpages ~/new, ~/sandbox template_list_add (template);											-- add this template's name to the list

if data.known_templates_cs12 [template_name] then anchor_id = anchor_id_make_cs12 (template);							-- extract an anchor id from this template list_add (anchor_id, anchor_id_list, true)

elseif data.known_templates_vcite [template_name] then local ref = template:match ('|%s*ref%s*=%s*(%b{})');				-- first look for |ref= or |ref= because we will strip templates from the vcite template if ref then															-- |ref= anchor_id = sfnref_get (ref);									-- returns content of or ; nil else list_add (anchor_id, anchor_id_list, true); else local params = {};

template_params_get (template, params);							-- build a table of template parameters and their values

anchor_id = params['ref'];										-- when both set, vcite uses value from |ref= if not anchor_id and params['harvid'] then anchor_id = 'CITEREF' .. params['harvid'];					-- in vcite, |harvid= auto-adds 'CITEREF' prefix to the value in |harvid= end list_add (anchor_id, anchor_id_list, true); end

elseif data.known_templates_harvc [template_name] then anchor_id = anchor_id_make_harvc (template);						-- extract an anchor id from this template list_add (anchor_id, anchor_id_list, true); elseif data.known_templates_wikicite [template_name] then local ref = template:match ('|%s*ref%s*=%s*(%b{})');				-- first look for |ref= or |ref= if ref then anchor_id = sfnref_get (ref); elseif template:match ('|%s*ref%s*=([^|}]+)') then anchor_id = template:match ('|%s*ref%s*=([^|}]+)');				-- plain-text elseif template:match ('|%s*id%s*=%s*(%b{})') then ref = template:match ('|%s*id%s*=%s*(%b{})'); anchor_id = 'Reference-' .. sfnref_get (ref);

elseif template:match ('|%s*id%s*=([^|}]+)') then anchor_id = 'Reference-' .. template:match ('|%s*id%s*=([^|}]+)');	-- plain-text

else anchor_id = nil;												-- no matches, ensure that anchor_id has no value end if anchor_id then list_add (anchor_id, anchor_id_list, true); end

elseif data.known_templates_anchor [template_name] then anchor_id_make_anchor (template, anchor_id_list);					-- extract anchor ids from this template if any elseif data.known_templates_sfn_whitelist [template_name] then template = template:gsub ('^$', '', 1);		-- remove outer 🇦🇩 and template name template = mw.text.trim (template, '%s|');							-- trim leading trailing white space and pipes template = mw.text.split (template, '%s*|%s*');						-- make a table of the template's parameters

for _, anchor_id in ipairs (template) do							-- spin through this template's parameter if '' ~= anchor_id and not article_whitelist[anchor_id] then article_whitelist[anchor_id] = 1;							-- add to the whitelist end end elseif template_name and whitelist.wrapper_templates[template_name] then anchor_id = anchor_id_make_wrapper (template);						-- extract an anchor id from this template if possible list_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-like anchor_id = anchor_id_make_cs12 (template);							-- extract an anchor id from this template if possible list_add (anchor_id, anchor_id_list, true); end

tstart, tend = Article_content:find (find_pattern, tend);				-- search for another template; begin at end of last search end

mw.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 article article_whitelist = article_whitelist,										-- table of anchor ids with false-positive error message to be suppressed template_list = template_list,												-- table of templates used in this article }