Create a shaka class to encapsulate ads.

Change-Id: Ic9388679754d24cef7246107e1e3b951977ce27f

build/types/ads

@@ -1,4 +1,5 @@
 # Ad Insertion Functionality
 
 +../../lib/ads/ad_manager.js
++../../lib/ads/client_side_ad.js
 +../../lib/ads/client_side_ad_manager.js

externs/ima.js

@@ -64,6 +64,11 @@ google.ima.AdsManager = class {
    */
   init(width, height, viewMode) {}
 
+  /**
+   * @return {number}
+   */
+  getRemainingTime() {}
+
   /** @override */
   addEventListener() {}
 
@@ -106,7 +111,17 @@ google.ima.AdsManagerLoadedEvent.Type = {
 
 
 /** @const */
-google.ima.AdEvent = {};
+google.ima.AdEvent = class extends Event {
+  /** @return {!google.ima.Ad } */
+  getAd() {}
+};
+
+
+/** @const */
+google.ima.Ad = class {
+  /** @return {number} */
+  getDuration() {}
+};
 
 
 /**

externs/shaka/ads.js

@@ -0,0 +1,41 @@
+/**
+ * @license
+ * Copyright 2016 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+/**
+ * @externs
+ */
+
+
+/**
+ * Interface for Ad objects.
+ *
+ * @extends {shaka.util.IReleasable}
+ * @interface
+ * @exportDoc
+ */
+shaka.extern.IAd = class {
+  /**
+   * @return {number}
+   */
+  getDuration() {}
+
+  /**
+   * @return {number}
+   */
+  getRemainingTime() {}
+};

lib/ads/client_side_ad.js

@@ -0,0 +1,62 @@
+/**
+ * @license
+ * Copyright 2016 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+goog.provide('shaka.ads.ClientSideAd');
+
+/**
+ * @implements {shaka.extern.IAd}
+ * @export
+ */
+shaka.ads.ClientSideAd = class {
+  /**
+   * @param {!google.ima.Ad} imaAd
+   * @param {!google.ima.AdsManager} imaAdManager
+   */
+  constructor(imaAd, imaAdManager) {
+    /** @private {google.ima.Ad} */
+    this.ad_ = imaAd;
+
+    /** @private {google.ima.AdsManager} */
+    this.manager_ = imaAdManager;
+  }
+
+  /**
+   * @override
+   * @export
+   */
+  getDuration() {
+    return this.ad_.getDuration();
+  }
+
+  /**
+   * @override
+   * @export
+   */
+  getRemainingTime() {
+    return this.manager_.getRemainingTime();
+  }
+
+  /**
+   * @override
+   * @export
+   */
+  release() {
+    this.ad_ = null;
+    this.manager_ = null;
+  }
+};