Module:Transclude

 -- <nowiki>
 --------------------------------------------------------------------------------
 -- Module that allows transcluding a template with all parent arguments.
 -- Useful in `/i18n` template subpages that delegate to a `/layout` subpage.
 --
 -- @module transclude
 -- @author [[User:ExE Boss]]
 --------------------------------------------------------------------------------

 require('strict')
 localcheckType=require('libraryUtil').checkType;

 localp={}
 localINVALID_TITLES={
 ["."]=true,
 [".."]=true,
 };

 localfunction_ne(value)
 returnvalueandvalue~=''
 end

 --------------------------------------------------------------------------------
 -- Helper function that merges argument tables.
 --
 -- @function mergeArgs
 -- @param {table} inArgs
 -- @param {table} outArgs
 --------------------------------------------------------------------------------
 localfunctionmergeArgs(inArgs,outArgs,opts)
 checkType("mergeArgs",1,inArgs,"table");
 checkType("mergeArgs",2,outArgs,"table");
 checkType("mergeArgs",3,opts,"table",true);
 opts=optsor{}

 localignoredParams=opts.ignoredParams;
 localignoredPrefix=opts.ignoredPrefix;

 forname,valueinpairs(inArgs)do
 if(type(name)=="string")then
 ifnot(
 (ignoredParamsandignoredParams[name]==true)
 or(ignoredPrefixand
 ignoredPrefix==name:sub(1,ignoredPrefix:len()))
 )then
 outArgs[name]=value;
 end
 else
 outArgs[name]=value;
 end
 end

 returnoutArgs;
 end

 -- Exported for testing:
 p['#mergeArgs']=mergeArgs;

 localmt={};

 functionmt.__index(_,name)
 if(
 type(name)~="string"
 orINVALID_TITLES[name]
 ormw.ustring.find(name,"#",nil,true)
 )then
 returnnil;
 end

 localtitle=mw.title.new(name,"Template")
 if(nottitle)then
 returnnil;
 end

 returnfunction(frame)
 checkType('transclude["'..name..'"]',1,frame,"table");
 localparentFrame=frame:getParent();

 localignoredParams,ignoredPrefix;
 if_ne(frame.args["#ignoredParams"])then
 ignoredParams={};
 forminmw.text.gsplit(frame.args["#ignoredParams"],'|',true)do
 ignoredParams[mw.text.trim(m)]=true;
 end
 end

 if_ne(frame.args['#ignoredPrefix'])then
 ignoredPrefix=frame.args['#ignoredPrefix'];
 end

 localargs={};
 if(parentFrame)then
 mergeArgs(parentFrame.args,args,{
 ignoredParams=ignoredParams,
 ignoredPrefix=ignoredPrefix,
 });
 end
 mergeArgs(frame.args,args,{
 ignoredPrefix="#",
 });

 if(nottitle.exists)then
 return"[[:"..title.fullText.."]]";
 end

 returnframe:expandTemplate{
 title=title,
 args=args,
 };
 end
 end

 returnsetmetatable(p,mt);