Adds class ServiceWorkerScriptCacheMap and new ServiceWorkerVersion::Listener methods related to sc…

content/browser/service_worker/service_worker_script_cache_map.h

+// Copyright 2014 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.
+
+#ifndef CONTENT_BROWSER_SERVICE_WORKER_SERVICE_SCRIPT_CACHE_MAP_H_
+#define CONTENT_BROWSER_SERVICE_WORKER_SERVICE_SCRIPT_CACHE_MAP_H_
+
+#include <map>
+
+#include "base/basictypes.h"
+#include "base/observer_list.h"
+
+class GURL;
+
+namespace content {
+
+class ServiceWorkerVersion;
+
+// Class that maintains the mapping between urls and a resource id
+// for a particular versions implicit script resources.
+class ServiceWorkerScriptCacheMap {
+ public:
+  class Observer {
+   public:
+    // Notification that the main script resource has been written to
+    // the disk cache. Only called when a version is being initially
+    // installed.
+    virtual void OnMainScriptCached(ServiceWorkerVersion* version,
+                                    bool success) = 0;
+
+    // Notification that the main script resource and all imports have
+    // been written to the disk cache. Only called when a version is
+    // being initially installed.
+    virtual void OnAllScriptsCached(ServiceWorkerVersion* version,
+                                    bool success) = 0;
+  };
+
+  int64 Lookup(const GURL& url);
+
+  // Adds and removes Observers.
+  void AddObserver(Observer* observer);
+  void RemoveObserver(Observer* observer);
+
+  // Used during the initial run of a new version to build the map
+  // of resources ids.
+  // TODO(michaeln): Need more info about errors in Finished.
+  void NotifyStartedCaching(const GURL& url, int64 resource_id);
+  void NotifyFinishedCaching(const GURL& url, bool success);
+  void NotifyEvalCompletion();
+
+ private:
+  typedef std::map<GURL, int64> ResourceIDMap;
+
+  // The version objects owns its script cache and provides a rawptr to it.
+  friend class ServiceWorkerVersion;
+  explicit ServiceWorkerScriptCacheMap(ServiceWorkerVersion* owner);
+  ~ServiceWorkerScriptCacheMap();
+
+  ServiceWorkerVersion* owner_;
+  ResourceIDMap resource_ids_;
+
+  // Members used only during initial install.
+  bool is_eval_complete_;
+  int resources_started_;
+  int resources_finished_;
+  bool has_error_;
+  ObserverList<Observer> observers_;
+
+  DISALLOW_COPY_AND_ASSIGN(ServiceWorkerScriptCacheMap);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_SCRIPT_CACHE_MAP_H_