Module:Split article

local MessageBox = require('Module:Message box')
local yesno = require("Module:Yesno")

local p = {}

local function singleText(args)
	-- from1 also included in case someone filed the template improperly
	local from = args["from"] or args["from1"] or mw.title.getCurrentTitle().subjectPageTitle()
	if args["from1"] then
		mw.addWarning("<code>from</code> is not a row-based parameter. Use <code>from</code> instead of <code>from1</code>.")
	end
	local from_oldid = args["from_oldid"] or args["from_oldid1"]
	if args["from_oldid1"] then
		mw.addWarning("<code>from_oldid</code> is not a row-based parameter. Use <code>from_oldid</code> instead of <code>from_oldid1</code>.")
	end
	
	-- Row-based parameters
	local to = args["to"] or args["to1"]
    if to == nil then
    	return mw.getCurrentFrame():expandTemplate{ title = "error", args = {
    		"Target page was not specified with <code>to</code>."
    	} }
	end
	
	local toTalk = mw.title.new(to).subjectPageTitle()
	local diff = args["diff"] or args["diff1"] or ""
	local date = args["date"] or args["date1"]
	
	local text = string.format("Material from [[%s]] was split to [[%s]]", from, to, date)
	if date then
		text = string.format("%s on %s", text, date)
	end
	if from_oldid then
		local oldidLink = ""
		if from_oldid:match("^%d+$") then
			oldidLink = string.format("[[Special:Diff/%s|this version]]", from_oldid)
		else
			oldidLink = string.format("[%s this version]", from_oldid)
		end
		
		text = string.format("%s from %s", oldidLink)
	end
	text = string.format(
		"%s. The former page's [[Special:PageHistory/%s|history]] now serves to "..
		"[[Wikipedia:Copying within Wikipedia|provide attribution]] for that content "..
		"in the latter page, and it must not be deleted so long as the latter page "..
		"exists. Please leave this template in place to link the article histories "..
		"and preserve this attribution. The former page's talk page can be accessed at [[%s]]", 
		text, from, toTalk
	)
	
	return text
end

local function bannerText(args)
	-- Checks if there are multiple rows
	local text
	local from2 = args["from2"]
	if (from2) then
		text = multiText(args) --.. categories(args,true)
	else
		text = singleText(args) --.. categories(args,false)
	end
	return text
end


function p.renderBanner(args)
	return MessageBox.main('tmbox', {
		name = "split-article",
		small = args["small"],
		image = '[[File:Split-arrows.svg|50px]]',
		text = bannerText(args)
	})
end

function p.main(frame)
	local getArgs = require('Module:Arguments').getArgs
	local args = getArgs(frame, {
		trim = true,
		removeBlanks = true
	})
	return p.renderBanner(args)
end

return p