wip youtube storage

src/jio.storage/youtubestorage.js

+/**
+ * Youtube (Data) Storage. Type = "youtube".
+ */
+/*global jIO, RSVP, UriTemplate, JSON*/
+/*jslint nomen: true*/
+(function (jIO, RSVP, UriTemplate, JSON) {
+  "use strict";
+
+  var GET_URL = "https://www.googleapis.com/youtube/v3/videos?" +
+    "part=snippet,statistics,contentDetails{&id}{&key}";
+  var GET_TEMPLATE = UriTemplate.parse(GET_URL);
+  var ALLDOCS_URL = "https://www.googleapis.com/youtube/v3/search?" +
+    "part=snippet{&pageToken}&q={search}&type=video&maxResults=10{&key}";
+  var ALLDOCS_TEMPLATE = UriTemplate.parse(ALLDOCS_URL);
+
+  function handleError(error, id) {
+    if (error.target && error.target.status === 404) {
+      throw new jIO.util.jIOError("Cannot find document: " + id, 404);
+    }
+    throw error;
+  }
+
+  /**
+   * The JIO Youtube Storage extension
+   *
+   * @class YoutubeStorage
+   * @constructor
+   */
+  function YoutubeStorage(spec) {
+    if (spec === undefined || spec.api_key === undefined ||
+        typeof spec.api_key !== 'string') {
+      throw new TypeError("API Key must be a string " +
+                          "which contains more than one character.");
+    }
+    this._api_key = spec.api_key;
+    return;
+  }
+
+  YoutubeStorage.prototype.get = function (id) {
+    var key = this._api_key;
+    return new RSVP.Queue()
+      .push(function () {
+        return jIO.util.ajax({
+          type: "GET",
+          url: GET_TEMPLATE.expand({
+            "id": id,
+            "key": key
+          })
+        });
+      })
+      .push(function (evt) {
+        return JSON.parse(evt.target.response || evt.target.responseText);
+      }, handleError);
+  };
+
+  YoutubeStorage.prototype.buildQuery = function (options) {
+    var key = this._api_key;
+    return new RSVP.Queue()
+      .push(function () {
+        return jIO.util.ajax({
+          "type": "GET",
+          "url": ALLDOCS_TEMPLATE.expand({
+            "search": options.query,
+            "key": key,
+            "pageToken": options.token || ""
+          })
+        });
+      })
+      .push(function (data) {
+        var obj = JSON.parse(data.target.response || data.target.responseText),
+          i;
+        for (i = 0; i < obj.items.length; i += 1) {
+          obj.items[i].value = {};
+        }
+        obj.items.nextPageToken = obj.nextPageToken;
+        return obj.items;
+
+      }, handleError);
+  };
+
+  YoutubeStorage.prototype.hasCapacity = function (name) {
+    return ((name === "list") || (name === "include") || (name === "query"));
+  };
+
+  jIO.addStorage('youtube', YoutubeStorage);
+
+} (jIO, RSVP, UriTemplate, JSON));