Module:Damage

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Module documentation
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-- <pre>
-- Implements {{MDamage}}


local p = {}

local function amount(a)
	-- convert used globals to locals where possible to improve performance
	local math = math
	local string = string
	local table = table
	local mw = mw
        local expr = mw.ext.ParserFunctions.expr

	local ret = {true, true, true, true, '</span>'}

	ret[1] = '<span class="MDamage Mdamage-'

	-- strip commas from input
	-- @example {{GEPrice|Foo}} -> '1,000'
	a = string.gsub(a, ',', '')

	-- for performance reasons, only calculate expr if required
	local a2 = tonumber(a)
	if a2 == nil then
		a = expr(a)
		a2 = tonumber(a) or '0'
	end

	-- round to 2 d.p.
	a = math.floor(a2 * 100 + 0.5) / 100

	local num = math.abs(a)
	local amounts = {1000, 250, 100, 25, 5, 4, 3, 2, 1}
	local result = 0
	for _, amount in ipairs(amounts) do
		result = amount
		if num >= amount then
			break
		end
	end

	ret[2] = tostring(result)

	-- set a class to denote positive or negative (css sets the colour)
	if a > 0 then
		ret[3] = ' Mdamage-pos">'
	elseif a < 0 then
		ret[3] = ' Mdamage-neg">'
	else
		ret[3] = '">'
	end

	-- format number with commas
	ret[4] = mw.language.getContentLanguage():formatNum(a)

	return table.concat( ret )
end

--
-- {{MDamage}} access point
--
function p.amount(frame)
	local args = frame:getParent().args
	-- for {{Mdamage|111}}
	local a = args[1] or '0'
	return amount(a)
end

--
-- Module access point
--
function p._amount(a)
	a = tostring(a) or '0'
	return amount(a)
end

return p