มอดูล:In lang

require('strict');
--list-cats=yes - documentation tool returns language-category names of cats populated by this template
(in )
local function _in_lang (args)
local yesno = require('มอดูล:Yesno')
	local synonym_table = mw.loadData ('มอดูล:Lang/ISO 639 synonyms');			-- ISO 639-2/639-2T code translation to 639-1 code
	local list_cats = 'yes' == args'list-cats';								-- make a boolean
	local list = {};
	local cats = {};
	local maint_msgs = {};
	
	if not args1 then
		local template = (args'template' and table.concat ({': '})) or ;	-- make template name (if provided by the template)
		return table.concat ({'ข้อผิดพลาด: ', template, 'ไม่มีแท็กภาษา'});
	end
	local module = 'มอดูล:Lang' .. (mw.getCurrentFrame():getTitle():match ('/sandbox') or );	-- if this module is the sandbox,
	local name_from_tag = require (module)._name_from_tag;						-- use มอดูล:Lang/sandbox; มอดูล:Lang else
	local namespace = mw.title.getCurrentTitle().namespace;						-- used for categorization
	local this_wiki_lang = mw.language.getContentLanguage().code;				-- get this wiki's language code
	local override_t = mw.loadData ('มอดูล:Lang/data').override;				-- this table holds IETF tag/name definitions known to มอดูล:Lang
	for i, lang in ipairs (args) do
		local code = argsi:lower();
		local t = {code, 'link' = args'link', 'template' = args'template'};	-- build an 'args' table
		lang = name_from_tag (t)												-- get the language name
		table.insert (list, lang)												-- add this language or error message to the list
		if code:find ('%-') and not override_tcode then						-- except for the IETF tags listed in 
			code = code:match ('^%a%a%a?%f^%a');								-- strip off region, script, and variant subtags so that they aren't used to make category names
		end
		if synonym_tablecode then												-- if 639-2/639-2T code has a 639-1 synonym
			if (0 == namespace) and not list_cats then							-- when listing cats don't include this cat; TODO: right choice?
				table.insert (cats, table.concat ({, code ..}));
			end
			table.insert (maint_msgs, ' ')
			table.insert (maint_msgs, table.concat ({'code: ', code, ' promoted to code: ', synonym_tablecode}));
			table.insert (maint_msgs, ';');
			code = synonym_tablecode;											-- use the synonym
		end
		if (0 == namespace) or list_cats then									-- when in article space
			if lang:find ('error') then										-- add error category (message provided by มอดูล:Lang)
				if not list_cats then											-- don't include this cat when listing cats; TODO: right choice?
					table.insert (cats, 'หมวดหมู่:แม่แบบ in lang ผิดพลาด');
				end
			elseif this_wiki_lang ~= code:match ('^%a%a%a?') then				-- categorize article only when code is not this wiki's language code or variants thereof
				if lang:match ('%%.-%%') then							-- wikilinked individual language name
					lang = lang:match ('%%(.-)%%');
				elseif lang:match ('%%.-%%') then							-- wikilinked collective languages name
					lang = lang:match ('%%(.-)%%');
				end																-- neither of these then plain-text language name
				if lang:find ('languages') then									-- add appropriate language-name category
					table.insert (cats, table.concat ({'หมวดหมู่:บทความที่มีแหล่งรวมภาษา', lang, ' (', code, ')'}));
				else
					table.insert (cats, table.concat ({'หมวดหมู่:บทความที่มีแหล่งที่มาภาษา', lang, ' (', code, ')'}));
				end
			end
		end
	end
	if list_cats then
		local cats = table.concat (cats, ', '):gsub ('%%', );				-- make a string of categories and then strip wikilink markup
		return cats
	end
local capBoolean = yesno(args'cap') or yesno(args'caps')
	local result = {'('};							-- opening span and (
	table.insert (result, capBoolean and 'ในภาษา' or 'ในภาษา');		        		-- add capitalized or uncapitalized 'in'
	table.insert (result, mw.text.listToText (list, ' ', (2 ');											-- add closing ) and closing span
	table.insert (result, table.concat (maint_msgs) or );			        	-- add maint messages, if any
	table.insert (result, table.concat (cats));									-- add categories
	return table.concat (result);												-- make a big string and done
end
--------------------------------------------------------------------------------------------
implements 
Module entry point from an list-cats=yes
local function in_lang (frame)
	local args = require ('มอดูล:Arguments').getArgs (frame);
	return _in_lang (args);
	end
----------------------------------------------------------------------
return {
	in_lang = in_lang,															-- module entry from 
	_in_lang = _in_lang,														-- module entry from another module
	}