local p = {}



local function makeError(msg, frame)

	-- Show error only in preview

	if (frame:preprocess( "{{REVISIONID}}" ) ~= "") then return '' end

	msg ='<strong>Error in [[Template:Hidden ping]]:</strong> ' .. msg

	return mw.text.tag('div', {['class'='error'}, msg)

end



function p.hiddenping(frame)

	local origArgs = frame:getParent().args

	local args = {}

	local maxArg = 0

	local usernames = 0

	for k, v in pairs(origArgs) do

		if type(k) == 'number' and mw.ustring.match(v,'%S') then

			if k > maxArg then maxArg = k end

			local title = mw.title.new(v)

			if title then

				argsk = title.rootText

				usernames = usernames + 1

			else

				return makeError('Input contains forbidden characters.', frame)

			end

		end

	end



	if usernames < 1 then

		return makeError('Username not given.', frame)

	elseif usernames > (tonumber(frame.args.max) or 50) then

		return makeError('More than '..tostring(frame.args.max or 50)..' names specified.', frame)

	else

		local outStr = ''

		for i = 1, maxArg do

			if argsi then outStr = outStr..'[[:User:'..argsi..'|&#x200B;]]' end

		end

		return outStr

	end

end



return p