Pony.fm/resources/assets/scripts/app/services/account-tracks.coffee

angular.module('ponyfm').factory('account-tracks', [
    '$rootScope', '$http'
    ($rootScope, $http) ->
        cache = {}

        self =
            clearCache: () -> cache = {}

            getEdit: (id, force) ->
                url = '/api/web/tracks/edit/' + id
                force = force || false
                return cache[url] if !force && cache[url]

                def = new $.Deferred()
                cache[url] = def
                $http.get(url).success (track) -> def.resolve track
                def.promise()

            refresh: (query, force) ->
                query = query || 'created_at,desc'
                url = '/api/web/tracks/owned?' + query
                force = force || false
                return cache[url] if !force && cache[url]

                def = new $.Deferred()
                cache[url] = def
                $http.get(url).success (tracks) -> def.resolve tracks
                def.promise()

        self
])