Module:User timezone

Documentation for this module may be created at Module:User timezone/doc

-- This module implements [[Template:User timezone]]

local p = {}

-- Ordered list of flag parameters and the label each should print.
local zones = {}
for i = 12, 1, -1 do
	zones[#zones + 1] = { param = 'UTC-' .. i, label = 'UTC-' .. i }
end
zones[#zones + 1] = { param = 'UTC', label = 'UTC' }
for i = 1, 14 do
	zones[#zones + 1] = { param = 'UTC' .. i, label = 'UTC+' .. i }
end

local function isSet( v )
	return v ~= nil and mw.text.trim( v ) ~= ''
end

-- Explicit |zone= wins; otherwise the first flag that's set.
local function resolveZone( args )
	if isSet( args.zone ) then
		return mw.text.trim( args.zone )
	end
	for _, z in ipairs( zones ) do
		if isSet( args[ z.param ] ) then
			return z.label
		end
	end
	return nil
end

function p.render( frame )
	local args     = frame:getParent().args
	local zone     = resolveZone( args )
	local zonename = isSet( args.zonename ) and mw.text.trim( args.zonename ) or nil

	local body = "This user's '''time zone''' is '''" .. ( zone or 'unknown' ) .. "'''."

	if zonename then
		body = body .. '<br />' .. frame:expandTemplate{ title = 'C', args = { zonename } }
	end

	local box = frame:expandTemplate{
		title = 'Userbox',
		args  = { '#996633', '#35230F', '[[Image:clock2uk.png|40px]]', body },
	}

	-- The docs promise a category. Now it's one line to actually deliver one.
	if zone and mw.title.getCurrentTitle().namespace == 2 then
		box = box .. '[[Category:' .. zone .. ' users]]'
	end

	return box
end

return p