Create top level apps component and move some apps code there.

This is a small patch to begin the process of pulling apps code out of chrome and the extensions system.

BUG=159366


Review URL: https://chromiumcodereview.appspot.com/11829055

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@177968 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 103 insertions, 0 deletions

diff --git a/apps/app_restore_service.cc b/apps/app_restore_service.cc
new file mode 100644
index 0000000..554f873
--- /dev/null
+++ b/apps/app_restore_service.cc
@@ -0,0 +1,103 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "apps/app_restore_service.h"
+
+#include "chrome/browser/extensions/api/app_runtime/app_runtime_api.h"
+#include "chrome/browser/extensions/event_router.h"
+#include "chrome/browser/extensions/extension_host.h"
+#include "chrome/browser/extensions/extension_service.h"
+#include "chrome/browser/extensions/extension_system.h"
+#include "chrome/common/chrome_notification_types.h"
+#include "chrome/common/extensions/extension.h"
+#include "chrome/common/extensions/extension_set.h"
+#include "content/public/browser/notification_details.h"
+#include "content/public/browser/notification_service.h"
+#include "content/public/browser/notification_types.h"
+
+using extensions::AppEventRouter;
+using extensions::Extension;
+using extensions::ExtensionHost;
+using extensions::ExtensionPrefs;
+using extensions::ExtensionSystem;
+
+namespace apps {
+
+AppRestoreService::AppRestoreService(Profile* profile)
+    : profile_(profile) {
+  registrar_.Add(
+      this, chrome::NOTIFICATION_EXTENSION_HOST_DID_STOP_LOADING,
+      content::NotificationService::AllSources());
+  registrar_.Add(
+      this, chrome::NOTIFICATION_EXTENSION_HOST_DESTROYED,
+      content::NotificationService::AllSources());
+  registrar_.Add(
+      this, chrome::NOTIFICATION_APP_TERMINATING,
+      content::NotificationService::AllSources());
+}
+
+void AppRestoreService::HandleStartup(bool should_restore_apps) {
+  ExtensionService* extension_service =
+      ExtensionSystem::Get(profile_)->extension_service();
+  const ExtensionSet* extensions = extension_service->extensions();
+  ExtensionPrefs* extension_prefs = extension_service->extension_prefs();
+
+  for (ExtensionSet::const_iterator it = extensions->begin();
+      it != extensions->end(); ++it) {
+    const Extension* extension = *it;
+    if (extension_prefs->IsExtensionRunning(extension->id())) {
+      RecordAppStop(extension->id());
+      if (should_restore_apps)
+        RestoreApp(*it);
+    }
+  }
+}
+
+void AppRestoreService::Observe(int type,
+                                const content::NotificationSource& source,
+                                const content::NotificationDetails& details) {
+  switch (type) {
+    case chrome::NOTIFICATION_EXTENSION_HOST_DID_STOP_LOADING: {
+      ExtensionHost* host = content::Details<ExtensionHost>(details).ptr();
+      const Extension* extension = host->extension();
+      if (extension && extension->is_platform_app())
+        RecordAppStart(extension->id());
+      break;
+    }
+
+    case chrome::NOTIFICATION_EXTENSION_HOST_DESTROYED: {
+      ExtensionHost* host = content::Details<ExtensionHost>(details).ptr();
+      const Extension* extension = host->extension();
+      if (extension && extension->is_platform_app())
+        RecordAppStop(extension->id());
+      break;
+    }
+
+    case chrome::NOTIFICATION_APP_TERMINATING: {
+      // Stop listening to NOTIFICATION_EXTENSION_HOST_DESTROYED in particular
+      // as all extension hosts will be destroyed as a result of shutdown.
+      registrar_.RemoveAll();
+      break;
+    }
+  }
+}
+
+
+void AppRestoreService::RecordAppStart(const std::string& extension_id) {
+  ExtensionPrefs* extension_prefs =
+      ExtensionSystem::Get(profile_)->extension_service()->extension_prefs();
+  extension_prefs->SetExtensionRunning(extension_id, true);
+}
+
+void AppRestoreService::RecordAppStop(const std::string& extension_id) {
+  ExtensionPrefs* extension_prefs =
+      ExtensionSystem::Get(profile_)->extension_service()->extension_prefs();
+  extension_prefs->SetExtensionRunning(extension_id, false);
+}
+
+void AppRestoreService::RestoreApp(const Extension* extension) {
+  AppEventRouter::DispatchOnRestartedEvent(profile_, extension);
+}
+
+}  // namespace apps