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gaia/apps/wappush/js/whitelist.js

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+/* -*- Mode: js; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- /
+/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
+
+/* global LazyLoader */
+/* exported WhiteList */
+
+'use strict';
+
+/**
+ * MSISDN whitelist, if not empty only the messages sent from the MSISDNs
+ * present in the list will be shown to the user, others will be discarded.
+ */
+var WhiteList = {
+  /** An array holding the list of MSISDNs */
+  _whiteList: [],
+
+  /**
+   * Read the whitelist.json file from disk and initialize the whitelist with
+   * it. If the file is not present or empty the whitelist will be empty.
+   */
+  init: function wl_init() {
+    return LazyLoader.getJSON('js/whitelist.json')
+      .then(
+        (function wl_load(list) {
+          this._whiteList = list;
+        }).bind(this),
+        function () {
+          /**
+           * This reject handler is important here because in case of
+           * whitelist json file missing or empty, getJSON rejects the promise.
+           * If this handler is not present here, the returned promise from
+           * this function will fail for the outside code
+           */
+        }
+      );
+  },
+
+  /**
+   * Checks if the element is in the whitelist.
+   *
+   * @return {Boolean} true if the element is in the whitelist, always return
+   *         true if the whitelist is empty.
+   */
+  has: function wl_has(value) {
+    if (this._whiteList.length === 0) {
+      return true;
+    }
+
+    return (this._whiteList.indexOf(value) !== -1);
+  }
+};