250 lines
8.4 KiB
JavaScript
250 lines
8.4 KiB
JavaScript
// TODO: Refactor using normalizr
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// TODO: https://facebook.github.io/immutable-js/ ?
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import "babel-polyfill";
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import fetch from "isomorphic-fetch";
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import humps from "humps";
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import X2JS from "x2js";
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import { assembleURLAndParams } from "../utils";
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export const API_VERSION = 350001; /** API version to use. */
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export const BASE_API_PATH = "/server/xml.server.php"; /** Base API path after endpoint. */
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// Error class to represents errors from these actions.
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class APIError extends Error {}
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function _checkHTTPStatus (response) {
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if (response.status >= 200 && response.status < 300) {
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return response;
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} else {
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return Promise.reject(response.statusText);
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}
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}
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function _parseToJSON (responseText) {
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var x2js = new X2JS({
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attributePrefix: "",
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keepCData: false
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});
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if (responseText) {
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return x2js.xml_str2json(responseText).root;
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}
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return Promise.reject("Invalid response text.");
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}
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function _checkAPIErrors (jsonData) {
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if (jsonData.error) {
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return Promise.reject(jsonData.error.cdata + " (" + jsonData.error.code + ")");
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} else if (!jsonData) {
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// No data returned
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return Promise.reject("Empty response");
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}
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return jsonData;
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}
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function _uglyFixes (endpoint, token) {
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if (typeof _uglyFixes.artistsCount === "undefined" ) {
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_uglyFixes.artistsCount = 0;
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}
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if (typeof _uglyFixes.albumsCount === "undefined" ) {
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_uglyFixes.albumsCount = 0;
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}
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if (typeof _uglyFixes.songsCount === "undefined" ) {
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_uglyFixes.songsCount = 0;
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}
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var _uglyFixesSongs = function (songs) {
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for (var i = 0; i < songs.length; i++) {
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// Fix for name becoming title in songs objects
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songs[i].name = songs[i].title;
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// Fix for length being time in songs objects
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songs[i].length = songs[i].time;
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// Fix for cdata left in artist and album
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songs[i].artist.name = songs[i].artist.cdata;
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songs[i].album.name = songs[i].album.cdata;
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}
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return songs;
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};
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var _uglyFixesAlbums = function (albums) {
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for (var i = 0; i < albums.length; i++) {
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// Fix for absence of distinction between disks in the same album
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if (albums[i].disk > 1) {
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albums[i].name = albums[i].name + " [Disk " + albums[i].disk + "]";
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}
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// Move songs one node top
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if (albums[i].tracks.song) {
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albums[i].tracks = albums[i].tracks.song;
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// Ensure tracks is an array
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if (!Array.isArray(albums[i].tracks)) {
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albums[i].tracks = [albums[i].tracks];
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}
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// Fix tracks
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albums[i].tracks = _uglyFixesSongs(albums[i].tracks);
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}
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}
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return albums;
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};
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return jsonData => {
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// Camelize
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jsonData = humps.camelizeKeys(jsonData);
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// Ensure items are always wrapped in an array
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if (jsonData.artist && !Array.isArray(jsonData.artist)) {
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jsonData.artist = [jsonData.artist];
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}
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if (jsonData.album && !Array.isArray(jsonData.album)) {
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jsonData.album = [jsonData.album];
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}
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if (jsonData.song && !Array.isArray(jsonData.song)) {
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jsonData.song = [jsonData.song];
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}
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// Keep track of artists count
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if (jsonData.artists) {
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_uglyFixes.artistsCount = parseInt(jsonData.artists);
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}
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// Keep track of albums count
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if (jsonData.albums) {
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_uglyFixes.albumsCount = parseInt(jsonData.albums);
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}
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// Keep track of songs count
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if (jsonData.songs) {
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_uglyFixes.songsCount = parseInt(jsonData.songs);
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}
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if (jsonData.artist) {
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for (var i = 0; i < jsonData.artist.length; i++) {
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// Fix for artists art not included
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jsonData.artist[i].art = endpoint.replace("/server/xml.server.php", "") + "/image.php?object_id=" + jsonData.artist[i].id + "&object_type=artist&auth=" + token;
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// Move albums one node top
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if (jsonData.artist[i].albums.album) {
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jsonData.artist[i].albums = jsonData.artist[i].albums.album;
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// Ensure albums are an array
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if (!Array.isArray(jsonData.artist[i].albums)) {
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jsonData.artist[i].albums = [jsonData.artist[i].albums];
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}
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// Fix albums
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jsonData.artist[i].albums = _uglyFixesAlbums(jsonData.artist[i].albums);
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}
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// Move songs one node top
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if (jsonData.artist[i].songs.song) {
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jsonData.artist[i].songs = jsonData.artist[i].songs.song;
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// Ensure songs are an array
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if (!Array.isArray(jsonData.artist[i].songs)) {
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jsonData.artist[i].songs = [jsonData.artist[i].songs];
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}
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// Fix songs
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jsonData.artist[i].songs = _uglyFixesSongs(jsonData.artist[i].songs);
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}
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}
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// Store the total number of items
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jsonData.artists = _uglyFixes.artistsCount;
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}
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if (jsonData.album) {
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// Fix albums
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jsonData.album = _uglyFixesAlbums(jsonData.album);
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// Store the total number of items
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jsonData.albums = _uglyFixes.albumsCount;
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}
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if (jsonData.song) {
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// Fix songs
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jsonData.song = _uglyFixesSongs(jsonData.song);
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// Store the total number of items
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jsonData.songs = _uglyFixes.songsCount;
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}
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if (!jsonData.sessionExpire) {
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// Fix for Ampache not returning updated sessionExpire
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jsonData.sessionExpire = (new Date(Date.now() + 3600 * 1000)).toJSON();
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}
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return jsonData;
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};
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}
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// Fetches an API response and normalizes the result JSON according to schema.
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// This makes every API response have the same shape, regardless of how nested it was.
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function doAPICall (endpoint, action, auth, username, extraParams) {
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const APIAction = extraParams.filter ? action.rstrip("s") : action;
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const baseParams = {
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version: API_VERSION,
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action: APIAction,
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auth: auth,
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user: username
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};
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const params = Object.assign({}, baseParams, extraParams);
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const fullURL = assembleURLAndParams(endpoint + BASE_API_PATH, params);
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return fetch(fullURL, {
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method: "get",
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})
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.then(_checkHTTPStatus)
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.then (response => response.text())
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.then(_parseToJSON)
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.then(_uglyFixes(endpoint, auth))
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.then(_checkAPIErrors);
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}
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// Action key that carries API call info interpreted by this Redux middleware.
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export const CALL_API = "CALL_API";
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// A Redux middleware that interprets actions with CALL_API info specified.
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// Performs the call and promises when such actions are dispatched.
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export default store => next => reduxAction => {
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if (reduxAction.type !== CALL_API) {
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// Do not apply on every action
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return next(reduxAction);
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}
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const { endpoint, action, auth, username, dispatch, extraParams } = reduxAction.payload;
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if (!endpoint || typeof endpoint !== "string") {
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throw new APIError("Specify a string endpoint URL.");
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}
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if (!action) {
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throw new APIError("Specify one of the supported API actions.");
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}
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if (!auth) {
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throw new APIError("Specify an auth token.");
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}
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if (!username) {
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throw new APIError("Specify a username.");
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}
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if (!Array.isArray(dispatch) || dispatch.length !== 3) {
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throw new APIError("Expected an array of three action dispatch.");
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}
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if (!dispatch.every(type => typeof type === "function" || type === null)) {
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throw new APIError("Expected action to dispatch to be functions or null.");
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}
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const [ requestDispatch, successDispatch, failureDispatch ] = dispatch;
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if (requestDispatch) {
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store.dispatch(requestDispatch());
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}
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return doAPICall(endpoint, action, auth, username, extraParams).then(
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response => {
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if (successDispatch) {
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store.dispatch(successDispatch(response));
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}
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},
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error => {
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if (failureDispatch) {
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store.dispatch(failureDispatch(error));
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}
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}
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);
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};
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