| // Copyright 2017 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 "extensions/browser/events/lazy_event_dispatch_util.h" |
| |
| #include "base/version.h" |
| #include "content/public/browser/browser_context.h" |
| #include "extensions/browser/event_router.h" |
| #include "extensions/browser/extension_prefs.h" |
| #include "extensions/browser/extension_registry.h" |
| |
| namespace extensions { |
| |
| namespace { |
| |
| // Previously installed version number. |
| const char kPrefPreviousVersion[] = "previous_version"; |
| |
| // A preference key storing the information about an extension that was |
| // installed but not loaded. We keep the pending info here so that we can send |
| // chrome.runtime.onInstalled event during the extension load. |
| const char kPrefPendingOnInstalledEventDispatchInfo[] = |
| "pending_on_installed_event_dispatch_info"; |
| |
| } // namespace |
| |
| LazyEventDispatchUtil::LazyEventDispatchUtil( |
| content::BrowserContext* browser_context) |
| : browser_context_(browser_context), extension_registry_observer_(this) { |
| extension_registry_observer_.Add(ExtensionRegistry::Get(browser_context_)); |
| } |
| |
| LazyEventDispatchUtil::~LazyEventDispatchUtil() {} |
| |
| void LazyEventDispatchUtil::AddObserver(Observer* observer) { |
| observers_.AddObserver(observer); |
| } |
| |
| void LazyEventDispatchUtil::RemoveObserver(Observer* observer) { |
| observers_.RemoveObserver(observer); |
| } |
| |
| void LazyEventDispatchUtil::OnExtensionLoaded( |
| content::BrowserContext* browser_context, |
| const Extension* extension) { |
| base::Version previous_version; |
| if (ReadPendingOnInstallInfoFromPref(extension->id(), &previous_version)) { |
| for (auto& observer : observers_) { |
| observer.OnExtensionInstalledAndLoaded(browser_context_, extension, |
| previous_version); |
| } |
| RemovePendingOnInstallInfoFromPref(extension->id()); |
| } |
| } |
| |
| void LazyEventDispatchUtil::OnExtensionUninstalled( |
| content::BrowserContext* browser_context, |
| const Extension* extension, |
| UninstallReason reason) { |
| RemovePendingOnInstallInfoFromPref(extension->id()); |
| } |
| |
| void LazyEventDispatchUtil::OnExtensionWillBeInstalled( |
| content::BrowserContext* browser_context, |
| const Extension* extension, |
| bool is_update, |
| const std::string& old_name) { |
| StorePendingOnInstallInfoToPref(extension); |
| } |
| |
| bool LazyEventDispatchUtil::ReadPendingOnInstallInfoFromPref( |
| const ExtensionId& extension_id, |
| base::Version* previous_version) { |
| ExtensionPrefs* prefs = ExtensionPrefs::Get(browser_context_); |
| DCHECK(prefs); |
| |
| const base::DictionaryValue* info = nullptr; |
| if (!prefs->ReadPrefAsDictionary( |
| extension_id, kPrefPendingOnInstalledEventDispatchInfo, &info)) { |
| return false; |
| } |
| |
| std::string previous_version_string; |
| info->GetString(kPrefPreviousVersion, &previous_version_string); |
| // |previous_version_string| can be empty. |
| *previous_version = base::Version(previous_version_string); |
| return true; |
| } |
| |
| void LazyEventDispatchUtil::RemovePendingOnInstallInfoFromPref( |
| const ExtensionId& extension_id) { |
| ExtensionPrefs* prefs = ExtensionPrefs::Get(browser_context_); |
| DCHECK(prefs); |
| |
| prefs->UpdateExtensionPref(extension_id, |
| kPrefPendingOnInstalledEventDispatchInfo, nullptr); |
| } |
| |
| void LazyEventDispatchUtil::StorePendingOnInstallInfoToPref( |
| const Extension* extension) { |
| ExtensionPrefs* prefs = ExtensionPrefs::Get(browser_context_); |
| DCHECK(prefs); |
| |
| // |pending_on_install_info| currently only contains a version string. Instead |
| // of making the pref hold a plain string, we store it as a dictionary value |
| // so that we can add more stuff to it in the future if necessary. |
| auto pending_on_install_info = std::make_unique<base::DictionaryValue>(); |
| base::Version previous_version = ExtensionRegistry::Get(browser_context_) |
| ->GetStoredVersion(extension->id()); |
| pending_on_install_info->SetString(kPrefPreviousVersion, |
| previous_version.IsValid() |
| ? previous_version.GetString() |
| : std::string()); |
| prefs->UpdateExtensionPref(extension->id(), |
| kPrefPendingOnInstalledEventDispatchInfo, |
| std::move(pending_on_install_info)); |
| } |
| |
| } // namespace extensions |