Mô đun:Section sizes

require('strict');
--=-----------------------------------------------------------------------
Gets the display text from a wikilink like B or B gives B
The str:gsub() returns either A|B froma B or B from B or B from B (no wikilink markup).
In l(), l:gsub() removes the link and pipe (if they exist); the second :gsub() trims white space from the label
if str was wrapped in wikilink markup.  Presumably, this is because without wikimarkup in str, there is no match
in the initial gsub, the replacement function l() doesn't get called.
**
local function remove_wiki_link (str)
	return (str:gsub( "%%(^%%*)%%", function(l)
		return l:gsub( "^*|(.*)$", "%1" ):gsub("^%s*(.-)%s*$", "%1");
	end));
end
--= Inspired from above, removes everything between 
Used to remove html containers from headers to fix breaking section links, but legitimate text within  are removed too
**
local function remove_container (str)
	return (str:gsub( "%*)%>", function(l)
		return l:gsub("^%s*(.-)%s*$", "");
	end));
end
--=-----------------------------------------------------------------------------
Makes a wikilink; when both link and display text is provided, returns a wikilink in the form D; if only
link is provided, returns a wikilink in the form L; if neither are provided or link is omitted, returns an
empty string.
**
local function make_wikilink (link, display)
	if link and ( ~= link) then
		if display and ( ~= display) then
			return table.concat ({, display, });
		else
			return table.concat ({, link, });
		end
	end
	return display or ;														-- link not set so return the display text
end
--------------------------------------------------------------------------------------------------
module entry point
create a wikilinked list of 's sections and their size in bytes in a sortable wikitable
local function size (frame)
	local A = {};																-- table to hold section names and sizes
	local section_name_list = {}												-- an interim list that holds just the section names
	local section_content;														-- section content used for counting
	local section = mw.title.new ("MediaWiki:Vector-toc-beginning"):getContent();	-- lead section doen't have a heading, call the text in MediaWiki:Vector-toc-beginning instead
	local count = {};															-- number of bytes in a section including the header text
	local totcount = {};
	local lastlevel;
	local maxlevels;
	local levelcounts = {};
	local upperlevel;
	local highlight;
	local highlighttot;
	local total;																-- sum of all byte counts
	local max;																	-- largest section so far encountered
	local totmax;																-- largest section so far encountered (section total)
	local _;																	-- dummy for using gsub to count bytes
	local lang = mw.language.getContentLanguage();								-- language object for number formatting appropriate to local language
	local s;																	-- start position of found heading (returned from string.find())
	local e = 1;																-- end position of found heading (returned from string.find())
	local section_name;															-- captured heading name (returned from string.find())
	local level = {};															-- number of leading '=' in heading markup; used for indenting subsections in the rendered list
	local wl_name;																-- anchor and display portion for wikilinks in rendered list
	local content = mw.title.new (frame.args1):getContent();					-- get unparsed wikitext from the article
	if not content then
		return 'error: no article:' .. frame.args1 .. ;
	end
	if content:find ('#REDIRECT') then											-- redirects don't have sections
		return 'error: ' .. frame.args1 .. ' is a redirect';
	end
	section_content = content:match ('(.-)===*');								-- get the lead section
	if section_content then
		_, count0 = section_content:gsub ('.', '%1');							-- count the size of the lead section
	else
		return 'error: no sections found in: ' .. frame.args1 .. ;
	end
	total = count0;
	max = count0;
	
	table.insert (A, make_wikilink (frame.args1, section) .. '
' .. lang:formatNum (count0) .. '
' .. lang:formatNum (count0));
	while (1) do																-- done this way because some articles reuse section names
		s, e, section_name = string.find (content, '\n==+ *(.-) *==+', e);		-- get start, end, and section name beginning a end of last find; newline must precede '==' heading markup
		if s then
			table.insert (section_name_list, {section_name, s});				-- save section name and start location of this find
		else
			break;
		end
	end
	
	for i, section_name in ipairs (section_name_list) do
		local escaped_section_name = string.gsub (section_name1, '(%(%)%.%%%+%-%*%?%%^%$%)', '%%%1');		-- escape lua patterns in section name
		local pattern = '(==+ *' .. escaped_section_name .. ' *==+.-)==+';		-- make a pattern to get the content of a section
		section_content = string.match (content, pattern, section_name2);		-- get the content beginning at the string.find() start location
		if section_content then
			_, counti = section_content:gsub ('.', '%1');						-- count the bytes in the section
			total = total + counti;
			max = max =lastlevel then
		totcounti=counti;
	end
		if leveli>0 then
	    	upperlevel=leveli-1;
	    	levelcountsupperlevel=levelcountsupperlevel+totcounti;
	end
		lastlevel=leveli;
		if totcounti>totmax then
			totmax=totcounti;
		end
	end
	for i, section_name in ipairs (section_name_list) do
		if counti==max then
			highlight='background:red;"|';
		else
			local proportion = counti / max									-- get value of "how much of the max" the count is
			local gb = 250 - math.floor(250 * proportion)						-- approach #f8f9fa r=248,g=249,b=250 (default wikitable cell color) for small bytecounts
			highlight = string.format('background:#F8%02X%02X;"|', gb, gb)		-- shade the bg as r: 248, g: gb, and b: gb
		end
		
		highlighttot=;														-- start the style declaration
		if totcounti==totmax then
			highlighttot=highlighttot .. 'background:red;';
		else
			local proportion = totcounti / totmax								-- get value of "how much of the max" the count is
			local gb = 250 - math.floor(250 * proportion)						-- approach #f8f9fa r=248,g=249,b=250 (default wikitable cell color) for small bytecounts
			highlighttot=highlighttot .. string.format('background:#F8%02X%02X;', gb, gb)	-- shade the bg as r: 248, g: gb, and b: gb
		end
		if leveli==2 then
			highlighttot=highlighttot .. 'font-weight:bold;';					-- if main section, make it bold
		elseif totcounti==counti then
			highlighttot='color:transparent;';									-- hide totals for subsections with no subsubsections, values required for proper sorting
		end
		highlighttot=highlighttot .. '"|';										-- close the style declaration
		
		leveli = (2 ' or ;		-- indent per heading level (number of '=' in heading markup)
			make_wikilink (frame.args1 .. '#' .. wl_name, wl_name),			-- section link
			leveli and  or ,										-- close the span if opened
			'
',																-- table column separator
			highlight ,
			lang:formatNum (counti),											-- commafied byte count for section
			'
',
			highlighttot ,
			lang:formatNum (totcounti),										-- section total count
		}));																
	end
	local out = {};																-- make a sortable wikitable for output
	table.insert (out, string.format ();													-- close the wikitable
	
	--max = lang:formatNum (max);												-- commafy so that the commafied value in the table can be found
	--local result = table.concat (out, ):gsub (max,  .. max .. );		-- make a big string, make largest count(s) red, and done
	local result = table.concat (out, );
	return result;																-- because gsub returns string and number of replacements
end
----------------------------------------------------------------------
return
	{
	size = size,
	}