Module:Footnotes

    From Ban Covert Modeling! wiki

    Documentation for this module may be created at Module:Footnotes/doc

    require('Module:No globals');
    local getArgs = require ('Module:Arguments').getArgs;
    
    
    --[[--------------------------< A R G S _ D E F A U L T >------------------------------------------------------
    
    a table to specify initial values.
    
    ]]
    
    local args_default = {
    	bracket_left = '',
    	bracket_right = '',
    	bracket_year_left = '',
    	bracket_year_right = '',
    	postscript = '',
    	page = '',
    	pages = '',
    	location = '',
    	page_sep = ", p.&nbsp;",
    	pages_sep = ", pp.&nbsp;",
    	ref = '',
    	template = 'harv',															-- if template name not provided in {{#invoke:}} use this
    	};
    
    
    --[[--------------------------< T A R G E T _ C H E C K >------------------------------------------------------
    
    look for anchor_id (CITEREF name-list and year or text from |ref=) in anchor_id_list
    
    the 'no target' error may be suppressed with |ignore-err=yes when target cannot be found because target is inside
    a template that wraps another template; 'multiple targets' error may not be suppressed
    
    ]]
    
    local function target_check (anchor_id, args)
    	local namespace = mw.title.getCurrentTitle().namespace;
    	local anchor_id_list_module = mw.loadData ('Module:Footnotes/anchor_id_list');
    	local anchor_id_list = anchor_id_list_module.anchor_id_list;
    	local article_whitelist = anchor_id_list_module.article_whitelist;
    	local template_list = anchor_id_list_module.template_list;
    	
    	local whitelist_module = mw.loadData ('Module:Footnotes/whitelist');
    	local whitelist = whitelist_module.whitelist;
    	local special_patterns = whitelist_module.special_patterns;
    	local DNB_special_patterns = whitelist_module.DNB_special_patterns;
    	local DNB_template_names = whitelist_module.DNB_template_names;
    
    	if 10 == namespace then
    		return '';																-- automatic form of |no-tracking=yes; TODO: is this too broad?
    	end
    
    	local tally = anchor_id_list[anchor_id];									-- nil when anchor_id not in list; else a tally
    	local msg;
    	local category;
    
    	if not tally then
    		if args.ignore then
    			return '';															-- if ignore is true then no message, no category
    		end
    		
    		if article_whitelist and article_whitelist[anchor_id] then				-- if an article-local whitelist and anchor ID is in it
    			return '';															-- done
    		end
    		
    		local wl_anchor_id = anchor_id;											-- copy to be modified to index into the whitelist
    		
    		if args.year then														-- for anchor IDs created by this template (not in |ref=) that have a date
    			if args.year:match ('%d%l$') or										-- use the date value to determine if we should remove the disambiguator
    				args.year:match ('n%.d%.%l$') or
    				args.year:match ('nd%l$') then
    					wl_anchor_id = wl_anchor_id:gsub ('%l$', '');				-- remove the disambiguator
    			end
    		end		
    
    		local t_tbl = whitelist[wl_anchor_id];									-- get list of templates associated with this anchor ID
    
    		if t_tbl then															-- when anchor ID not whitelisted t_tbl is nil
    			for _, t in ipairs (t_tbl) do										-- spin through the list of templates associated with this anchor ID
    				if template_list[t] then										-- if associated template is found in the list of templates in the article
    					return '';													-- anchor ID is whitlisted and article has matching template so no error
    				end
    			end
    		end
    
    		for _, pattern in ipairs (special_patterns) do							-- spin through the spcial patterns and try to match
    			if anchor_id:match (pattern) then
    				return '';
    			end
    		end
    
    		for _, dnb_t in ipairs (DNB_template_names or {}) do					-- getting desparate now, are there any DNB templates? DNB_template_names may be nil; empty table prevents script error
    			if template_list[dnb_t] then										-- if the article has this DNB template
    				for _, pattern in ipairs (DNB_special_patterns) do				-- spin through the DNB-specifiec wildcard patterns
    					if anchor_id:match (pattern) then							-- and attempt a match
    						return '';												-- found a match
    					end
    				end
    			end
    		end
    
    		msg = 'no target: ' .. anchor_id;										-- anchor_id not found
    		category = '[[Category:Harv and Sfn no-target errors]]';
    
    	elseif 1 < tally then
    		msg = 'multiple targets (' .. tally .. '×): ' .. anchor_id;				-- more than one anchor_id in this article
    		category = '[[Category:Harv and Sfn multiple-target errors]]';
    	end
    
    --	category = 0 == namespace and '[[Category:Harv and Sfn template errors]]' or '';	-- only categorize in article space
    	category = 0 == namespace and category or '';								-- only categorize in article space
    
    --use this version to show error messages
    --	return msg and '<span class="error harv-error" style="display: inline; font-size:100%"> ' .. args.template .. ' error: ' .. msg .. ' ([[:Category:Harv and Sfn template errors|help]])</span>' .. category or '';
    --use this version to hide error messages
    	return msg and '<span class="error harv-error" style="display: none; font-size:100%"> ' .. args.template .. ' error: ' .. msg .. ' ([[:Category:Harv and Sfn template errors|help]])</span>' .. category or '';
    
    end
    
    
    --[[--------------------------< I S _ Y E A R >----------------------------------------------------------------
    
    evaluates param to see if it is one of these forms with or without lowercase letter disambiguator:
    	YYYY
    	n.d.
    	nd	
    	c. YYYY
    	YYYY–YYYY	(separator is endash)
    	YYYY–YY		(separator is endash)
    
    return true when param has a recognized form; false else
    
    ]]
    
    local patterns_date= {
    	'^%d%d%d%d?%l?$',
    	'^n%.d%.%l?$',
    	'^nd%l?$',
    	'^c%. %d%d%d%d?%l?$',
    	'^%d%d%d%d–%d%d%d%d%l?$',
    	'^%d%d%d%d–%d%d%l?$',
    	}
    
    local function is_year (param, args)
    	args.year = '';																-- used for harv error; 
    	
    	for _, pattern in ipairs (patterns_date) do
    		if mw.ustring.match (param, pattern) then
    			args.year = param;													-- used for harv error; 
    			return true;
    		end
    	end
    end
    
    
    --[[--------------------------< C O R E >----------------------------------------------------------------------
    
    returns an anchor link (CITEREF) formed from one to four author names, year, and insource location (|p=, |pp=, loc=)
    
    ]]
    
    local function core( args )
    	local result;
    	local err_msg = ''
    
    	if args.P5 ~= '' then
    		if is_year (args.P5, args) then
    			result = table.concat ({args.P1, ' et al. ', args.bracket_year_left, args.P5, args.bracket_year_right});
    		else
    			args.P5 = '';														-- when P5 not a year don't include in anchor
    			result = table.concat ({args.P1, ' et al.'});						-- and don't render it
    		end
    
    	elseif args.P4 ~= '' then
    		if is_year (args.P4, args) then
    			result = table.concat ({args.P1, ', ', args.P2, ' &amp; ', args.P3, ' ', args.bracket_year_left, args.P4, args.bracket_year_right});	-- three names and a year
    		else
    			result = table.concat ({args.P1, ' et al.'});						-- four names
    		end
    
    	elseif args.P3 ~= '' then
    		if is_year (args.P3, args) then
    			result = table.concat ({args.P1, ' &amp; ', args.P2, ' ', args.bracket_year_left, args.P3, args.bracket_year_right});	-- two names and a year
    		else
    			result = table.concat ({args.P1, ', ', args.P2, ' ', ' &amp; ', args.P3});	-- three names
    		end
    			
    	elseif args.P2 ~= '' then
    		if is_year (args.P2, args) then
    			result = table.concat ({args.P1, ' ', args.bracket_year_left, args.P2, args.bracket_year_right});	-- one name and year
    		else
    			result = table.concat ({args.P1, ' &amp; ', args.P2});				-- two names
    		end
    		
    	else
    		result = args.P1;														-- one name
    	end
    																				-- when author-date result ends with a dot (typically when the last positional parameter holds 'n.d.')
    																				-- and when no in-source location (no |p=, |pp=, or |loc=)
    																				-- and when the first or only character in args.postscript is a dot
    																				-- remove the author-date result trailing dot
    																				-- the author-date result trailing dot will be replaced later with the content of args.postscript (usually a dot)
    	if ('.' == result:sub(-1)) and ('.' == args.postscript:sub(1)) and ('' == args.page) and ('' == args.pages) and ('' == args.location) then
    		result = result:gsub ('%.$', '');
    	end
    	
    	if args.ref ~= 'none' then
    		local anchor_id;
    		if args.ref ~= '' then
    			anchor_id = mw.uri.anchorEncode (args.ref);
    			err_msg = target_check (anchor_id, args);
    			result = table.concat ({'[[#', anchor_id, '|', result, ']]'});
    		else
    			anchor_id = mw.uri.anchorEncode (table.concat ({'CITEREF', args.P1, args.P2, args.P3, args.P4, args.P5}));
    			err_msg = target_check (anchor_id, args);
    			result = table.concat ({'[[#', anchor_id, '|', result, ']]'});
    		end
    	end
    
    	if args.page ~= '' then
    		result = table.concat ({result, args.page_sep, args.page});
    	elseif args.pages ~= ''then
    		result = table.concat ({result, args.pages_sep, args.pages});
    	end      
    
    	if args.location ~= '' then
    		result = table.concat ({result, ', ', args.location});
    	end
    
    	result = table.concat ({args.bracket_left, result, args.bracket_right, args.postscript}):gsub ('%s+', ' ');		-- strip redundant spaces
    	return result .. err_msg;
    end
    
    
    --[[--------------------------< A R G S  _ F E T C H >---------------------------------------------------------
    
    Because all of the templates share a common set of parameters, a single common function to fetch those parameters
    from frame and parent frame.
    
    ]]
    
    local function args_fetch (frame, ps)
    	local args = args_default;													-- create a copy of the default table
    	local pframe = frame:getParent();											-- point to the template's parameter table
    
    	for k, v in pairs (frame.args) do											-- override defaults with values provided in the #invoke: if any
    		args[k] = v;	   
    	end
    	
    	args.postscript = pframe.args.postscript or pframe.args.ps or ps;
    	if 'none' == args.postscript then
    		args.postscript = '';
    	end
    	args.page = pframe.args.p or pframe.args.page or '';
    	args.pages = pframe.args.pp or pframe.args.pages or '';
    	args.location = pframe.args.loc or '';
    	args.ref = pframe.args.ref or pframe.args.Ref or '';
    	args.ignore = ('yes' == pframe.args['ignore-false-positive']) or ('yes' == pframe.args['ignore-err']);
    
    	for i, v in ipairs ({'P1', 'P2', 'P3', 'P4', 'P5'}) do						-- loop through the five positional parameters and trim if set else empty string
    		args[v] = (pframe.args[i] and mw.text.trim (pframe.args[i])) or '';
    	end
    
    	if args.P5 and not is_year (args.P5, args) then
    		local i = 6;															-- initialize the indexer to the sixth positional parameter
    		while pframe.args[i] do													-- in case there are too many authors loop through the authors looking for a year
    			local v = mw.text.trim (pframe.args[i]);							-- trim
    			if is_year (v, args) then											-- if a year
    				args.P5 = v;													-- overwrite whatever was in args.P5 with year
    				break;															-- and abandon the search
    			end
    			i = i + 1;															-- bump the indexer
    		end
    	end
    	return args;
    end
    
    
    --[[--------------------------< H A R V A R D _ C I T A T I O N >----------------------------------------------
    
    common entry point for:
    	{{harvard citation}} aka {{harv}}
    	{{Harvard citation no brackets}} aka {{harvnb}}
    	{{harvcol}}
    	{{harvcolnb}}
    	{{harvcoltxt}}
    	{{Harvard citation text}} aka {{harvtxt}}
    	{{Harvp}}
    
    Distinguishing features (brackets and page separators) are specified in this module's {{#invoke}} in the respective templates.
    
    ]]
    
    local function harvard_citation (frame)
    	local args = args_fetch (frame, '');										-- get the template and invoke parameters; default postscript is empty string
    
    	return core (args);
    end
    
    
    --[[--------------------------< S T R I P _ U R L >------------------------------------------------------------
    
    used by sfn() and sfnm().  This function fixes an issue with reference tooltip gadget where the tooltip is not displayed
    when an insource locator (|p=, |pp=, |loc=) has an external wikilink that contains a # character
    
    strip uri-reserved characters from urls in |p=, |pp-, and |loc= parameters  The researved characters are:
    	!#$&'()*+,/:;=?@[]
    	
    ]]
    
    local function strip_url (pages)
    	local escaped_uri;
    	if not pages or ('' == pages) then
    		return pages;
    	end
    	
    	for uri in pages:gmatch ('%[(%a[%w%+%.%-]*://%S+)') do						-- for each external link get the uri
    		escaped_uri = uri:gsub ("([%(%)%.%%%+%-%*%?%[%^%$%]])", "%%%1" );		-- save a copy with lua pattern characters escaped
    		uri = uri:gsub ("[!#%$&'%(%)%*%+,/:;=%?@%[%]%.%%]", '');				-- remove reserved characters and '%' because '%20' (space character) is a lua 'invalid capture index'
    		pages = pages:gsub (escaped_uri, uri, 1);								-- replace original uri with the stripped version
    	end
    	
    	return pages;
    end
    
    
    --[[--------------------------< S F N >------------------------------------------------------------------------
    
    entry point for {{sfn}} and {{sfnp}}
    
    ]]
    
    local function sfn (frame)
    	local args = args_fetch (frame, '.');										-- get the template and invoke parameters; default postscript is a dot
    
    	local result = core (args);													-- go make a CITEREF anchor
    																				-- put it all together and then strip redundant spaces
    	local name = table.concat ({'FOOTNOTE', args.P1, args.P2, args.P3, args.P4, args.P5, strip_url (args.page), strip_url (args.pages), strip_url (args.location)}):gsub ('%s+', ' ');
    
    	return frame:extensionTag ({name='ref', args={name=name}, content=result});	
    
    	
    end
    
    
    --[[--------------------------< S F N M >----------------------------------------------------------------------
    
    common entry point for {{sfnm}} and {{sfnmp}}
    
    Distinguishing features (brackets) are specified in this module's {{#invoke}} in the respective templates.
    
    ]]
    
    local function sfnm (frame)
    	local args = args_default;													-- create a copy of the default table
    	local pframe = frame:getParent();											-- point to the template's parameter table
    	
    	local n = 1;																-- index of source; this is the 'n' in na1, ny, etc
    	local first_pnum = 1;														-- first of a pair of positional parameters
    	local second_pnum = 2;														-- second of a pair of positional parameters
    
    	local last_ps = 0;															-- index of the last source with |nps= set
    	local last_index = 0;														-- index of the last source; these used to determine which of |ps= or |nps= will terminate the whole rendering
    
    	local out = {};																-- table to hold rendered sources
    	local footnote = {'FOOTNOTE'};												-- all author, date, insource location stuff becomes part of the reference's footnote id; added as we go
    
    	for k, v in pairs (frame.args) do											-- override defaults with values provided in the #invoke: if any
    		args[k] = v;	   
    	end
    	
    	while true do
    		if not pframe.args[table.concat ({n, 'a1'})] and not pframe.args[first_pnum] then
    			break;																-- no na1 or matching positional parameter so done
    		end
    		
    		if pframe.args[table.concat ({n, 'a1'})] then							-- does this source use named parameters?
    			for _, v in ipairs ({'P1', 'P2', 'P3', 'P4', 'P5'}) do				-- initialize for this source
    				args[v] = '';
    			end
    
    			for i, v in ipairs ({'P1', 'P2', 'P3', 'P4', 'P5'}) do				-- extract author and year parameters for this source
    				args[v] = pframe.args[table.concat ({n, 'a', i})] or '';		-- attempt to assign author name
    				if '' == args[v] then											-- when there wasn't an author name
    					args[v] = pframe.args[table.concat ({n, 'y'})] or '';		-- attempt to assign year
    					break;														-- done with author/date for this source
    				end
    			end
    
    		else																	-- this source uses positional parameters
    			args.P1 = mw.text.trim (pframe.args[first_pnum]);					-- yes, only one author supported
    			args.P2 = (pframe.args[second_pnum] and mw.text.trim (pframe.args[second_pnum])) or '';	-- when positional author, year must also be positional
    
    			for _, v in ipairs ({'P3', 'P4', 'P5'}) do							-- blank the rest of these for this source
    				args[v] = '';
    			end
    
    			first_pnum = first_pnum + 2;										-- source must use positional author and positional year
    			second_pnum = first_pnum + 1;										-- bump these for possible next positional source
    		end
    		
    		args.postscript = pframe.args[table.concat ({n, 'ps'})] or '';
    		if 'none' == args.postscript then										-- this for compatibility with other footnote templates; does nothing
    			args.postscript = '';
    		end
    
    		args.ref = pframe.args[table.concat ({n, 'ref'})] or '';				-- alternate reference for this source
    
    		args.page = pframe.args[table.concat ({n, 'p'})] or '';					-- insource locations for this source
    		args.pages = pframe.args[table.concat ({n, 'pp'})] or '';
    		args.location = pframe.args[table.concat ({n, 'loc'})] or '';
    		args.ignore = ('yes' == pframe.args[table.concat ({n, 'ignore-false-positive'})]) or ('yes' == pframe.args[table.concat ({n, 'ignore-err'})]);
    --		args.ignore = 'yes' == pframe.args[table.concat ({n, 'ignore-err'})];
    
    		table.insert (out, core (args));										-- save the rendering of this source
    		
    		for k, v in ipairs ({'P1', 'P2', 'P3', 'P4', 'P5'}) do					-- create the FOOTNOTE id
    			if '' ~= args[v] then
    				table.insert (footnote, args[v]);
    			end
    		end
    		for k, v in ipairs ({'page', 'pages', 'location'}) do					-- these done separately so that we can strip uri-reserved characters from extlinked page numbers 
    			if '' ~= args[v] then
    				table.insert (footnote, strip_url (args[v]))
    			end
    		end
    		
    		last_index = n;															-- flags used to select terminal postscript from nps or from end_ps
    		if '' ~= args.postscript then							
    			last_ps = n;
    		end
    		
    		n = n+1;																-- bump for the next one
    	end
    	
    	local name = table.concat (footnote):gsub ('%s+', ' ');						-- put the footnote together and strip redundant space
    	
    	args.end_ps = pframe.args.postscript or pframe.args.ps or '.';				-- this is the postscript for the whole not for the individual sources
    	if 'none' == args.end_ps then												-- not an original sfnm parameter value; added for compatibility with other footnote templates
    		args.end_ps = '';
    	end
    
    	local result = table.concat ({table.concat (out, '; '), (last_index == last_ps) and '' or  args.end_ps});
    	return frame:extensionTag ({name='ref', args={name=name}, content=result});
    end
    
    
    --[[--------------------------< S F N R E F >------------------------------------------------------------------
    
    implements {{sfnref}}
    
    ]]
    
    local function sfnref (frame)
    	local args = getArgs (frame);
    	local out = {};
    	
    	for i=1, 5 do																-- get the first five args if there are five args
    		if args[i] then
    			out[i] = args[i];
    		else
    			break;																-- less than 5 args break out
    		end
    	end
    	
    	if 5 == #out then															-- when we have seen five args there may bemore
    		local i = 6;															-- initialize the indexer to the sixth positional parameter
    		while args[i] do														-- in case there are too many authors loop through the authors looking for a year
    			if is_year (args[i], args) then										-- if a year
    				out[5] = args[i];												-- overwrite whatever was in args[5] with year
    				break;															-- and abandon the search
    			end
    			i = i + 1;															-- bump the indexer
    		end
    	end
    	
    	return mw.uri.anchorEncode ('CITEREF' .. table.concat (out));
    end
    
    
    --[[--------------------------< E X P O R T E D   F U N C T I O N S >------------------------------------------
    ]]
    
    return {
    	harvard_citation = harvard_citation,
    	sfn = sfn,
    	sfnm = sfnm,
    	sfnref = sfnref,
    	};