Love2d Resource Manager

gistfile1.lua

-- exporting table
local exports = {}

-- table containing the resources
local resources = {}
local imagepath = "image"
local soundpath = "sounds"
local fontpath = "fonts"

-- add image to resource manager
local function addImage(id, img)
	if not img then img = id end
	resources[id] = love.graphics.newImage(img)
	return resources[id]
end

local function isWav (filename)
	local s, e = string.find(filename, ".+%.wav")
end

-- add sound to resource manager
local function addSound(id, snd)
	if not snd then snd = id end
	if isWav(snd) then
		resources[id] = love.audio.newSource(snd, 'static')
	else
		resources[id] = love.audio.newSource(snd)
	end
	return resources[id]
end

-- add font to resource manager
local function addFont(id, fnt, size)
	if not fnt then fnt = id end
	if not size then size = 14 end
	resources[id] = love.graphics.newFont(fnt, size)
	return resources[id]
end

-- get a resource from the resource table
local function get(id, objType)
	local resource = resources[id]
	if not resource then return nil end
	if ojbType then
		assert(resource:typeOf(objType))
	end
	return resource
end

-- remove extension from file name
local function removeExtension(filename)
	local s, e, name = string.find(filename, "(.+)%..*") -- see: http://www.lua.org/manual/5.1/manual.html#5.4.1
	return name
end

local function isValidFile(filename)
	local s, e = string.find(filename, ".+%..+")
	if s then return true else return false end
end
	
-- recursively scan directory for files
-- and execute the callback on the file
local function loadDirectory(dir, callback)
	if string.find(dir, ".*%.svn") then return end
	local lfs = love.filesystem
	if not lfs.exists(dir) then return end
	
	local files = lfs.enumerate(dir)
	for i, v in ipairs(files) do
		local file = dir.."/"..v
		if lfs.isFile(file) and isValidFile(v) then
			callback(removeExtension(v), file)
		elseif lfs.isDirectory(file) then
			loadDirectory(file, callback)
		end
	end
end

-- load every available resource
local function loadAll()
	loadDirectory(imagepath, addImage)
	loadDirectory(soundpath, addSound)
	loadDirectory(fontpath, addFont)
end

loadAll()

-- add functions to export module
exports.get = get
exports.resource = get -- PLACEHOLDER

-- return module
return exports