Module:Template link general

-- This implements Template:Tlg
local getArgs = require('Module:Arguments').getArgs
local p = {}

-- Is a string non-empty?
local function _ne(s) 
	return s ~= nil and s ~= ""
end

local function addTemplate(s)
	local i, _ = s:find(':', 1, true)
	if i == nil then
		return 'Template:' .. s
	end
	local ns = s:sub(1, i - 1)
	if ns == '' or mw.site.namespaces[ns] then
		return s
	else
		return 'Template:' .. s
	end
end

local function trimTemplate(s)
	local needle = 'template:'
	if s:sub(1, needle:len()):lower() == needle then
		return s:sub(needle:len() + 1)	
	else
		return s
	end
end

local function linkTitle(args)
	if _ne(args.nolink) then
		return args['1']
	end
	
	local titleObj
	local titlePart = '[[:'
	if args['1'] then
		-- This handles :Page and other NS
		titleObj = mw.title.new(args['1'], 'Template')
	else
		titleObj = mw.title.getCurrentTitle()
	end
	
	titlePart = titlePart .. (titleObj ~= nil and titleObj.fullText or
				addTemplate(args['1']))
	
	local textPart = args.alttext
	if not _ne(textPart) then
		if titleObj ~= nil then
			textPart = titleObj.ns == 10 and titleObj.text or titleObj.fullText
		else
			-- redlink
			textPart = trimTemplate(args['1'])
		end
	end
	
	if _ne(args.subst) then
		textPart = 'subst:' .. textPart
	end
	
	if _ne(args.brace) then
		textPart = '<nowiki>{{</nowiki>' .. textPart .. '<nowiki>}}</nowiki>'
	elseif _ne(args.braceinside) then
		textPart = '{' .. textPart .. '}'
	end
	
	titlePart = titlePart .. '&#124;' .. textPart
	if _ne(args.braceinside) then
		titlePart = '<nowiki>{' .. titlePart .. '}</nowiki>'
	end
	return titlePart
end

function p.main(frame)
	local args = getArgs(frame)
	return p._main(args)
end

function p._main(args)
	local bold = _ne(args.bold) or _ne(args.boldlink) or _ne(args.boldname)
	local italic = _ne(args.italic) or _ne(args.italics)
	local dontBrace = _ne(args.brace) or _ne(args.braceinside)
	local code = _ne(args.code) or _ne(args.tt)
	
	-- Build the link part
	local titlePart = linkTitle(args)
	if bold then titlePart = "'''" .. titlePart .. "'''" end
	if _ne(args.nowrapname) then titlePart = '<span class="nowrap">' .. titlePart .. '</span>' end
	
	-- Build the arguments
	local textPart = ""
	for i = 2, 11 do
		local ii = tostring(i)
		local val = args[ii]
		if not _ne(val) then break end
		if not _ne(args.yeswiki) then val = '<nowiki>' .. val .. '</nowiki>' end
		if italic then val = '<span style="font-style:italic;">' .. val .. '</span>' end
		textPart = textPart .. '&#124;' .. val
	end
	if _ne(args['12']) then textPart = textPart .. '&#124;…' end
	
	-- final wrap
	local ret = titlePart .. textPart
	if not dontBrace then ret = '<nowiki>{{</nowiki>' .. ret .. '<nowiki>}}</nowiki>' end
	if _ne(args.a) then ret = '<nowiki>*</nowiki>&nbsp;' .. ret end
	if _ne(args.kbd) then ret = '<kbd>' .. ret .. '</kbd>' end
	if code then
		ret = '<code>' .. ret .. '</code>'
	elseif _ne(args.plaincode) then
		ret = '<code style="border:none;background:transparent;">' .. ret .. '</code>'
	end
	if _ne(args.nowrap) then ret = '<span class="nowrap">' .. ret .. '</span>' end
	
	-- Wrap as html
	local span = mw.html.create()
	span:wikitext(ret)
	return tostring(span)
end

return p