Module:Unsigned

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This module implements {{unsigned}}. It has a few functions:

• main called by {{unsigned}}; not intended for broader use
• getTimestamp find a timestamp from a string. If only a date is found, it returns the date. If only a time is found, it returns the empty string. If a time and a date are both found, it appends (UTC).
• getUsername gets the username from a string containing a timestamp. It currently assumes that everything besides a timestamp is part of the username.

The above documentation is transcluded from Module:Unsigned/doc. (edit | history)
Editors can experiment in this module's sandbox (edit | diff) and testcases (create) pages.
Subpages of this module.

local p = {}

local function trim(s)
	return s:gsub("^%s+", ""):gsub("%s+$", ""):gsub("\226\128\142", "")
end

function p.getTimestamp(s)
	--gets the timestamp in the input
	--if nothing is found, returns the empty string
	--we search for time and date seperately to allow for a time-less addition of date
	local currentTestString
	--this flag tells us to return an error if we only have a time (no date)
	--match() on a nil is a bad thing, so avoid that
	local sOrBlank = s or ''
	
	currentTestString = mw.ustring.match( sOrBlank, '%d%d? %u%l+ %d%d%d%d', 0 ) or ''
	
	if currentTestString ~= '' then
		-- we have a date, so process and return accordingly
		local theTime = mw.ustring.match( sOrBlank, '%d%d:%d%d,', 0 ) or ''
		if theTime ~= '' then
			return theTime .. ' ' .. currentTestString .. ' (UTC)'
		else
			return currentTestString
		end
	else
		return ''
	end
end

function p.getUsername(s)
	--gets the username in the input
	--------WARNING--------
	--this method assumes that *everything* besides the timestamp is, in fact, part of the username
	--it does no further username validation
	--if you try putting random garbage in, you **will** get garbage out
	--------YOU HAVE BEEN WARNED--------
	local toReturn = s or ''
	--remove the date
	toReturn = mw.ustring.gsub(toReturn, '%d%d? %u%l+ %d%d%d%d', '', 1) or ''
	--remove the time
	toReturn = mw.ustring.gsub(toReturn, '%d%d:%d%d,?', '', 1) or ''
	--remove (UTC)
	toReturn = mw.ustring.gsub(toReturn, '%(UTC%)', '', 1) or ''
	--concat the empty string to ensure we only return the string and not the number of matches
	return trim(toReturn) .. ''
end

local function makeUnsigned(args)
	local isIP
	local username
	local timestamp
	local toReturn
	
	if args[2] then
		-- we have multiple parameters
		-- so we can be less janky
		timestamp = p.getTimestamp(args[2])
		if timestamp ~= '' then
			username = trim(args[1] or '')
		else
			username = trim(args[2] or '')
			timestamp = args[1]
		end
	else
		-- be very janky; this has a high probability of GIGO-ing
		-- due to the way getUsername is implemented
		username = p.getUsername(args[1])
		timestamp = p.getTimestamp(args[1])
	end
	
	-- error if we cannot find a username
	if username == '' then
		return '<em class="error">Unable to detect username</em>'
	end
	
	-- check if we have an IP address or not
	isIp = require('Module:IPAddress')._isIp(username)
	
	if isIp then
		return mw.getCurrentFrame():expandTemplate{ title = 'unsigned/unregistered', args = { username , timestamp } } 
	else
		return mw.getCurrentFrame():expandTemplate{ title = 'unsigned/registered', args = { username , timestamp } }
	end
end

function p.main(frame)
	local args
	if type(frame.args) == 'table' then
		-- We're being called via #invoke. The args are passed through to the module
		-- from the template page, so use the args that were passed into the template.
		args = require('Module:Arguments').getArgs(frame)
	else
		-- We're being called from another module or from the debug console, so assume
		-- the args are passed in directly.
		args = frame
	end
	return makeUnsigned(args)
end

return p