content/browser/geofencing/geofencing_manager.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CONTENT_BROWSER_GEOFENCING_GEOFENCING_MANAGER_H_
   6 #define CONTENT_BROWSER_GEOFENCING_GEOFENCING_MANAGER_H_
   7
   8 #include <map>
   9 #include <string>
  10 #include <vector>
  11
  12 #include "base/callback_forward.h"
  13 #include "base/macros.h"
  14 #include "base/memory/ref_counted.h"
  15 #include "base/memory/scoped_ptr.h"
  16 #include "content/browser/geofencing/geofencing_registration_delegate.h"
  17 #include "content/browser/service_worker/service_worker_storage.h"
  18 #include "content/common/content_export.h"
  19 #include "content/common/geofencing_status.h"
  20 #include "content/common/service_worker/service_worker_status_code.h"
  21
  22 template <typename T>
  23 struct DefaultSingletonTraits;
  24 class GURL;
  25
  26 namespace blink {
  27 struct WebCircularGeofencingRegion;
  28 };
  29
  30 namespace content {
  31
  32 class GeofencingService;
  33 class ServiceWorkerContextWrapper;
  34 class ServiceWorkerRegistration;
  35
  36 // This is the main API to the geofencing subsystem. There is one instance of
  37 // this class per storage partition.
  38 // This class is responsible for keeping track of which geofences are currently
  39 // registered by websites/workers, persisting this list of registrations and
  40 // registering them with the global |GeofencingService|.
  41 // This class is created on the UI thread, but all its methods should only be
  42 // called from the IO thread.
  43 // TODO(mek): Implement some kind of persistence of registrations.
  44 // TODO(mek): Unregister a geofence when the ServiceWorkerRegistration it
  45 //    belongs to goes away.
  46 class CONTENT_EXPORT GeofencingManager
  47     : NON_EXPORTED_BASE(public GeofencingRegistrationDelegate),
  48       public base::RefCountedThreadSafe<GeofencingManager> {
  49  public:
  50   typedef base::Callback<void(GeofencingStatus)> StatusCallback;
  51
  52   explicit GeofencingManager(
  53       const scoped_refptr<ServiceWorkerContextWrapper>& service_worker_context);
  54
  55   // Init and Shutdown are for use on the UI thread when the storagepartition is
  56   // being setup and torn down.
  57   void Init();
  58   void Shutdown();
  59
  60   // Initiates registration of a new geofence. StatusCallback is called when
  61   // registration has completed or failed (which could possibly be before
  62   // RegisterRegion returns.
  63   // Attempting to register a region with the same ID as an already registered
  64   // (or in progress of being registered) region will fail.
  65   // TODO(mek): Behavior when using an already used ID might need to be revised
  66   //     depending on what the actual spec ends up saying about this.
  67   void RegisterRegion(int64 service_worker_registration_id,
  68                       const std::string& region_id,
  69                       const blink::WebCircularGeofencingRegion& region,
  70                       const StatusCallback& callback);
  71
  72   // Unregister a region that was previously registered by a call to
  73   // RegisterRegion. Any attempt to unregister a region that has not been
  74   // registered, or for which the registration is still in progress
  75   // (RegisterRegion hasn't called its callback yet) will fail.
  76   // TODO(mek): Maybe better behavior would be to allow unregistering still
  77   //     in-progress registrations.
  78   void UnregisterRegion(int64 service_worker_registration_id,
  79                         const std::string& region_id,
  80                         const StatusCallback& callback);
  81
  82   // Returns all currently registered regions. In case of failure (no geofencing
  83   // provider available for example) return an error status, while leaving
  84   // |regions| untouched.
  85   // This only returns regions for which the callback passed to RegisterRegion
  86   // has been called already (so it doesn't include still in progress
  87   // registrations).
  88   GeofencingStatus GetRegisteredRegions(
  89       int64 service_worker_registration_id,
  90       std::map<std::string, blink::WebCircularGeofencingRegion>* result);
  91
  92   void SetServiceForTesting(GeofencingService* service) {
  93     service_ = service;
  94   }
  95
  96  protected:
  97   friend class base::RefCountedThreadSafe<GeofencingManager>;
  98   ~GeofencingManager() override;
  99
 100  private:
 101   // Internal bookkeeping associated with each registered geofence.
 102   struct Registration;
 103
 104   void InitOnIO();
 105   void ShutdownOnIO();
 106
 107   // GeofencingRegistrationDelegate implementation.
 108   void RegistrationFinished(int64 geofencing_registration_id,
 109                             GeofencingStatus status) override;
 110   void RegionEntered(int64 geofencing_registration_id) override;
 111   void RegionExited(int64 geofencing_registration_id) override;
 112
 113   // Looks up a particular geofence registration. Returns nullptr if no
 114   // registration with the given IDs exists.
 115   Registration* FindRegistration(int64 service_worker_registration_id,
 116                                  const std::string& region_id);
 117
 118   // Looks up a particular geofence registration. Returns nullptr if no
 119   // registration with the given ID exists.
 120   Registration* FindRegistrationById(int64 geofencing_registration_id);
 121
 122   // Registers a new registration, returning a reference to the newly inserted
 123   // object. Assumes no registration with the same IDs currently exists.
 124   Registration& AddRegistration(
 125       int64 service_worker_registration_id,
 126       const GURL& service_worker_origin,
 127       const std::string& region_id,
 128       const blink::WebCircularGeofencingRegion& region,
 129       const StatusCallback& callback,
 130       int64 geofencing_registration_id);
 131
 132   // Clears a registration.
 133   void ClearRegistration(Registration* registration);
 134
 135   // Starts dispatching a particular geofencing |event_type| for the geofence
 136   // registration with the given ID. This first looks up the Service Worker
 137   // Registration the geofence is associated with, and then attempts to deliver
 138   // the event to that service worker.
 139   void DispatchGeofencingEvent(blink::WebGeofencingEventType event_type,
 140                                int64 geofencing_registration_id);
 141
 142   // Delivers an event to the specified service worker for the given geofence.
 143   // If the geofence registration id is no longer valid, this method does
 144   // nothing. This assumes the |service_worker_registration| is the service
 145   // worker the geofence registration is associated with.
 146   void DeliverGeofencingEvent(blink::WebGeofencingEventType event_type,
 147                               int64 geofencing_registration_id,
 148                               ServiceWorkerStatusCode service_worker_status,
 149                               const scoped_refptr<ServiceWorkerRegistration>&
 150                                   service_worker_registration);
 151
 152   // Called when delivery of a geofence event to a service worker has finished
 153   // (or failed to finish).
 154   void DeliverGeofencingEventEnd(const scoped_refptr<ServiceWorkerRegistration>&
 155                                      service_worker_registration,
 156                                  ServiceWorkerStatusCode service_worker_status);
 157
 158   // Map of all registered regions for a particular service worker registration.
 159   typedef std::map<std::string, Registration> RegionIdRegistrationMap;
 160   // Map of service worker registration id to the regions registered by that
 161   // service worker.
 162   typedef std::map<int64, RegionIdRegistrationMap>
 163       ServiceWorkerRegistrationsMap;
 164   ServiceWorkerRegistrationsMap registrations_;
 165
 166   // Map of all registered regions by geofencing_registration_id.
 167   typedef std::map<int64, RegionIdRegistrationMap::iterator>
 168       RegistrationIdRegistrationMap;
 169   RegistrationIdRegistrationMap registrations_by_id_;
 170
 171   GeofencingService* service_;
 172   scoped_refptr<ServiceWorkerContextWrapper> service_worker_context_;
 173
 174   DISALLOW_COPY_AND_ASSIGN(GeofencingManager);
 175 };
 176
 177 }  // namespace content
 178
 179 #endif  // CONTENT_BROWSER_GEOFENCING_GEOFENCING_MANAGER_H_