Extension alarms now persist in Preferences.

chrome/browser/extensions/api/alarms/alarm_manager.cc

 // 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 "chrome/browser/extensions/api/alarms/alarm_manager.h"
 
 #include "base/bind.h"
 #include "base/json/json_writer.h"
 #include "base/message_loop.h"
 #include "base/values.h"
 #include "chrome/browser/extensions/extension_event_router.h"
+#include "chrome/browser/extensions/extension_prefs.h"
+#include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/extension_system.h"
 #include "chrome/browser/profiles/profile.h"
+#include "chrome/common/chrome_notification_types.h"
+#include "content/public/browser/notification_service.h"
 
 namespace extensions {
 
 namespace {
 
 const char kOnAlarmEvent[] = "experimental.alarms.onAlarm";
 
 class DefaultAlarmDelegate : public AlarmManager::Delegate {
  public:
   explicit DefaultAlarmDelegate(Profile* profile) : profile_(profile) {}
@@ skipping 11 matching lines @@
 
  private:
   Profile* profile_;
 };
 
 }
 
 AlarmManager::AlarmManager(Profile* profile)
     : profile_(profile),
       delegate_(new DefaultAlarmDelegate(profile)) {
+  registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_LOADED,
+                 content::Source<Profile>(profile_));
 }
 
 AlarmManager::~AlarmManager() {
 }
 
 void AlarmManager::AddAlarm(const std::string& extension_id,
                             const linked_ptr<Alarm>& alarm) {
-  // TODO(mpcomplete): Better handling of granularity.
-  // http://crbug.com/122683
-
-  // Override any old alarm with the same name.
-  AlarmIterator old_alarm = GetAlarmIterator(extension_id, alarm->name);
-  if (old_alarm.first != alarms_.end())
-    RemoveAlarmIterator(old_alarm);
-
-  alarms_[extension_id].push_back(alarm);
-  base::Timer* timer = new base::Timer(true, alarm->repeating);
-  timers_[alarm.get()] = make_linked_ptr(timer);
-  timer->Start(FROM_HERE,
-      base::TimeDelta::FromSeconds(alarm->delay_in_seconds),
-      base::Bind(&AlarmManager::OnAlarm, base::Unretained(this),
-                 extension_id, alarm->name));
+  AddAlarmImpl(extension_id, alarm,
+               base::TimeDelta::FromSeconds(alarm->delay_in_seconds));
+  WriteToPrefs(extension_id);
 }
 
 const AlarmManager::Alarm* AlarmManager::GetAlarm(
     const std::string& extension_id, const std::string& name) {
   AlarmIterator it = GetAlarmIterator(extension_id, name);
   if (it.first == alarms_.end())
     return NULL;
   return it.second->get();
 }
 
@@ skipping 18 matching lines @@
   }
 
   return make_pair(alarms_.end(), AlarmList::iterator());
 }
 
 bool AlarmManager::RemoveAlarm(const std::string& extension_id,
                                const std::string& name) {
   AlarmIterator it = GetAlarmIterator(extension_id, name);
   if (it.first == alarms_.end())
     return false;
+
   RemoveAlarmIterator(it);
+  WriteToPrefs(extension_id);
   return true;
 }
 
 void AlarmManager::RemoveAllAlarms(const std::string& extension_id) {
   AlarmMap::iterator list = alarms_.find(extension_id);
   if (list == alarms_.end())
     return;
 
   // Note: I'm using indices rather than iterators here because
   // RemoveAlarmIterator will delete the list when it becomes empty.
   for (size_t i = 0, size = list->second.size(); i < size; ++i)
     RemoveAlarmIterator(AlarmIterator(list, list->second.begin()));
 
   CHECK(alarms_.find(extension_id) == alarms_.end());
+  WriteToPrefs(extension_id);
 }
 
 void AlarmManager::RemoveAlarmIterator(const AlarmIterator& iter) {
   // Cancel the timer first.
   timers_[iter.second->get()]->Stop();
   timers_.erase(iter.second->get());
 
   // Clean up our alarm list.
   AlarmList& list = iter.first->second;
   list.erase(iter.second);
   if (list.empty())
     alarms_.erase(iter.first);
 }
 
 void AlarmManager::OnAlarm(const std::string& extension_id,
                            const std::string& name) {
   AlarmIterator it = GetAlarmIterator(extension_id, name);
   CHECK(it.first != alarms_.end());
-  delegate_->OnAlarm(extension_id, *it.second->get());
+  const Alarm* alarm = it.second->get();
+  delegate_->OnAlarm(extension_id, *alarm);
 
-  if (!(*it.second)->repeating)
+  if (!alarm->repeating) {
     RemoveAlarmIterator(it);
+  } else {
+    // Restart the timer, since it may have been set with a shorter delay
+    // initially.
+    base::Timer* timer = timers_[alarm].get();
+    timer->Start(FROM_HERE,
+        base::TimeDelta::FromSeconds(alarm->delay_in_seconds),
+        base::Bind(&AlarmManager::OnAlarm, base::Unretained(this),
+                   extension_id, alarm->name));
+  }
+
+  WriteToPrefs(extension_id);
+}
+
+void AlarmManager::AddAlarmImpl(const std::string& extension_id,
+                                const linked_ptr<Alarm>& alarm,
+                                base::TimeDelta timer_delay) {
+  // Override any old alarm with the same name.
+  AlarmIterator old_alarm = GetAlarmIterator(extension_id, alarm->name);
+  if (old_alarm.first != alarms_.end())
+    RemoveAlarmIterator(old_alarm);
+
+  alarms_[extension_id].push_back(alarm);
+
+  base::Timer* timer = new base::Timer(true, alarm->repeating);
+  timers_[alarm.get()] = make_linked_ptr(timer);
+  timer->Start(FROM_HERE,
+      timer_delay,
+      base::Bind(&AlarmManager::OnAlarm, base::Unretained(this),
+                 extension_id, alarm->name));
+}
+
+void AlarmManager::WriteToPrefs(const std::string& extension_id) {
+  ExtensionService* service =
+      ExtensionSystem::Get(profile_)->extension_service();
+  if (!service || !service->extension_prefs())
+    return;
+
+  std::vector<AlarmPref> alarm_prefs;
+
+  AlarmMap::iterator list = alarms_.find(extension_id);
+  if (list != alarms_.end()) {
+    for (AlarmList::iterator it = list->second.begin();
+         it != list->second.end(); ++it) {
+      base::Timer* timer = timers_[it->get()].get();
+      base::TimeDelta delay =
+          timer->desired_run_time() - base::TimeTicks::Now();
+      AlarmPref pref;
+      pref.alarm = *it;
+      pref.scheduled_run_time = base::Time::Now() + delay;
+      alarm_prefs.push_back(pref);
+    }
+  }
+
+  service->extension_prefs()->SetRegisteredAlarms(extension_id, alarm_prefs);
+}
+
+void AlarmManager::ReadFromPrefs(const std::string& extension_id) {
+  ExtensionService* service =
+      ExtensionSystem::Get(profile_)->extension_service();
+  if (!service || !service->extension_prefs())
+    return;
+
+  std::vector<AlarmPref> alarm_prefs =
+      service->extension_prefs()->GetRegisteredAlarms(extension_id);
+  for (size_t i = 0; i < alarm_prefs.size(); ++i) {
+    base::TimeDelta delay =
+        alarm_prefs[i].scheduled_run_time - base::Time::Now();
+    if (delay < base::TimeDelta::FromSeconds(0))
+      delay = base::TimeDelta::FromSeconds(0);
+
+    AddAlarmImpl(extension_id, alarm_prefs[i].alarm, delay);
+  }
+}
+
+void AlarmManager::Observe(
+    int type,
+    const content::NotificationSource& source,
+    const content::NotificationDetails& details) {
+  switch (type) {
+    case chrome::NOTIFICATION_EXTENSION_LOADED: {
+      const Extension* extension =
+          content::Details<const Extension>(details).ptr();
+      ReadFromPrefs(extension->id());
+      break;
+    }
+    default:
+      NOTREACHED();
+      break;
+  }
+}
+
+AlarmPref::AlarmPref() {
+}
+
+AlarmPref::~AlarmPref() {
 }
 
 }  // namespace extensions