1 files changed, 99 insertions, 0 deletions
diff --git a/apps/system/js/applications.js b/apps/system/js/applications.js
new file mode 100644
index 0000000..f1e286f
--- /dev/null
+++ b/apps/system/js/applications.js
@@ -0,0 +1,99 @@
+/* -*- Mode: js; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- /
+/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
+
+'use strict';
+
+// Application module handles the information of apps on behalf of other
+// modules.
+
+var Applications = {
+  installedApps: {},
+  ready: false,
+  init: function a_init() {
+    var self = this;
+    var apps = navigator.mozApps;
+
+    var getAllApps = function getAllApps() {
+      navigator.mozApps.mgmt.getAll().onsuccess = function mozAppGotAll(evt) {
+        var apps = evt.target.result;
+        apps.forEach(function(app) {
+          self.installedApps[app.manifestURL] = app;
+          // TODO Followup for retrieving homescreen & comms app
+        });
+
+        self.ready = true;
+        self.fireApplicationReadyEvent();
+      };
+    };
+
+    // We need to wait for the chrome shell to let us know when it's ok to
+    // launch activities. This prevents race conditions.
+    // The event does not fire again when we reload System app in on
+    // B2G Desktop, so we save the information into sessionStorage.
+    if (window.sessionStorage.getItem('webapps-registry-ready')) {
+      getAllApps();
+    } else {
+      window.addEventListener('mozChromeEvent', function mozAppReady(event) {
+        if (event.detail.type != 'webapps-registry-ready')
+          return;
+
+        window.sessionStorage.setItem('webapps-registry-ready', 'yes');
+        window.removeEventListener('mozChromeEvent', mozAppReady);
+
+        getAllApps();
+      });
+    }
+
+    apps.mgmt.oninstall = function a_install(evt) {
+      var newapp = evt.application;
+      self.installedApps[newapp.manifestURL] = newapp;
+
+      self.fireApplicationInstallEvent(newapp);
+    };
+
+    apps.mgmt.onuninstall = function a_uninstall(evt) {
+      var deletedapp = evt.application;
+      delete self.installedApps[deletedapp.manifestURL];
+
+      self.fireApplicationUninstallEvent(deletedapp);
+    };
+  },
+
+  getByManifestURL: function a_getByManifestURL(manifestURL) {
+    if (manifestURL in this.installedApps) {
+      return this.installedApps[manifestURL];
+    }
+
+    return null;
+  },
+
+  fireApplicationReadyEvent: function a_fireAppReadyEvent() {
+    var evt = document.createEvent('CustomEvent');
+    evt.initCustomEvent('applicationready',
+      /* canBubble */ true, /* cancelable */ false,
+      { applications: this.installedApps });
+    window.dispatchEvent(evt);
+  },
+
+  // We need to dispatch the following events because
+  // mozApps is not doing so right now.
+  // ref: https://bugzilla.mozilla.org/show_bug.cgi?id=731746
+
+  fireApplicationInstallEvent: function a_fireApplicationInstallEvent(app) {
+    var evt = document.createEvent('CustomEvent');
+    evt.initCustomEvent('applicationinstall',
+      /* canBubble */ true, /* cancelable */ false,
+      { application: app });
+    window.dispatchEvent(evt);
+  },
+
+  fireApplicationUninstallEvent: function a_fireApplicationUninstallEvent(app) {
+    var evt = document.createEvent('CustomEvent');
+    evt.initCustomEvent('applicationuninstall',
+      /* canBubble */ true, /* cancelable */ false,
+      { application: app });
+    window.dispatchEvent(evt);
+  }
+};
+
+Applications.init();