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assets/webapps/system.gaiamobile.org/js/cell_broadcast_system.js

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+'use strict';
+/* global CarrierInfoNotifier */
+/* global MobileOperator */
+/* global Service */
+
+(function(exports) {
+
+  /**
+   * CellBroadcastSystem
+   * @class CellBroadcastSystem
+   * @requires CarrierInfoNotifier
+   * @requires MobileOperator
+   */
+  function CellBroadcastSystem() {}
+
+  CellBroadcastSystem.prototype = {
+    name: 'CellBroadcastSystem',
+
+    /**
+     * Whether or not the cellbroadcast setting is enabled or disabled.
+     * @memberof CellBroadcastSystem.prototype
+     * @type {Array}
+     */
+    _settingsDisabled: [],
+
+    /**
+     * The cell broadcast settings key.
+     * @memberof CellBroadcastSystem.prototype
+     * @type {String}
+     */
+    _settingsKey: 'ril.cellbroadcast.disabled',
+
+    /**
+     * Starts listening for events and settings changes.
+     * @memberof CellBroadcastSystem.prototype
+     */
+    start: function cbs_start() {
+      var self = this;
+      if (navigator && navigator.mozCellBroadcast) {
+        navigator.mozCellBroadcast.onreceived = this.show.bind(this);
+      }
+
+      var settings = window.navigator.mozSettings;
+      var req = settings.createLock().get(this._settingsKey);
+      req.onsuccess = function() {
+        self._settingsDisabled = req.result[self._settingsKey];
+      };
+
+      settings.addObserver(
+        this._settingsKey, this.settingsChangedHandler.bind(this));
+      Service.register('show', this);
+    },
+
+    /**
+     * Called when the cellbroadcast setting is changed.
+     * @memberof CellBroadcastSystem.prototype
+     */
+    settingsChangedHandler: function cbs_settingsChangedHandler(event) {
+      this._settingsDisabled = event.settingValue;
+
+      if (this._hasCBSDisabled()) {
+        var evt = new CustomEvent('cellbroadcastmsgchanged', { detail: null });
+        window.dispatchEvent(evt);
+      }
+    },
+
+    /**
+     * Shows the cell broadcast notification.
+     * @memberof CellBroadcastSystem.prototype
+     */
+    show: function cbs_show(event) {
+      var msg = event.message;
+      var serviceId = msg.serviceId || 0;
+      var conn = window.navigator.mozMobileConnections[serviceId];
+      var id = msg.messageId;
+      var cdmaCategory = msg.cdmaServiceCategory;
+
+      // Early return CMAS messsage and let network alert app handle it. Please
+      // ref http://www.etsi.org/deliver/etsi_ts/123000_123099/123041/
+      // 11.06.00_60/ts_123041v110600p.pdf, chapter 9.4.1.2.2 Message identifier
+      // for GSM and http://www.3gpp2.org/public_html/specs/
+      // C.R1001-G_v1.0_Param_Administration.pdf for CDMA.
+      // GSM Message id from range 4370 to 4399(1112 hex to 112f hex) and 
+      // CDMA service category from range 4096 to 4351(1000 hex to 10ff hex)
+      // should be CMAS and network alert will display detail information.
+
+      var isGSM = cdmaCategory === null;
+      var isGSMCmas = isGSM && (id >= 4370 && id < 4400);
+      var isCDMACmas = !isGSM &&
+        (cdmaCategory >= 0x1000 && cdmaCategory <= 0x10FF);
+
+      if (isGSMCmas || isCDMACmas) {
+        return;
+      }
+
+      if (conn && conn.voice && conn.voice.network &&
+          conn.voice.network.mcc === MobileOperator.BRAZIL_MCC &&
+          id === MobileOperator.BRAZIL_CELLBROADCAST_CHANNEL) {
+        var evt = new CustomEvent('cellbroadcastmsgchanged',
+          { detail: msg.body });
+        window.dispatchEvent(evt);
+        return;
+      }
+
+      var body = msg.body;
+
+      // XXX: 'undefined' test until bug-1021177 lands
+      if (msg.etws && (!body || (body == 'undefined'))) {
+        body = navigator.mozL10n.get('cb-etws-warningType-' +
+          (msg.etws.warningType ? msg.etws.warningType : 'other'));
+      }
+
+      CarrierInfoNotifier.show(body,
+        navigator.mozL10n.get('cb-channel', { channel: id }));
+    },
+
+    /**
+     * To make sure there is any CBS pref is disabled
+     * @memberof CellBroadcastSystem.prototype
+     */
+    _hasCBSDisabled: function cbs__getDisabledCBSIndex() {
+      var index =
+        this._settingsDisabled.findIndex(disabled => (disabled === true));
+      return (index >= 0);
+    }
+  };
+
+  exports.CellBroadcastSystem = CellBroadcastSystem;
+
+}(window));