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// Copyright (c) 2006-2008 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/extensions_service.h"
#include "base/file_util.h"
#include "base/values.h"
#include "base/string_util.h"
#include "base/thread.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/extensions/user_script_master.h"
#include "chrome/common/json_value_serializer.h"
#include "chrome/common/notification_service.h"
// ExtensionsService
const FilePath::CharType* ExtensionsService::kInstallDirectoryName =
FILE_PATH_LITERAL("Extensions");
ExtensionsService::ExtensionsService(const FilePath& profile_directory,
UserScriptMaster* user_script_master)
: message_loop_(MessageLoop::current()),
backend_(new ExtensionsServiceBackend),
install_directory_(profile_directory.Append(kInstallDirectoryName)),
user_script_master_(user_script_master) {
}
ExtensionsService::~ExtensionsService() {
for (ExtensionList::iterator iter = extensions_.begin();
iter != extensions_.end(); ++iter) {
delete *iter;
}
}
bool ExtensionsService::Init() {
// TODO(aa): This message loop should probably come from a backend
// interface, similar to how the message loop for the frontend comes
// from the frontend interface.
g_browser_process->file_thread()->message_loop()->PostTask(FROM_HERE,
NewRunnableMethod(backend_.get(),
&ExtensionsServiceBackend::LoadExtensionsFromDirectory,
install_directory_,
scoped_refptr<ExtensionsServiceFrontendInterface>(this)));
// TODO(aa): Load extensions from other registered directories.
return true;
}
MessageLoop* ExtensionsService::GetMessageLoop() {
return message_loop_;
}
void ExtensionsService::OnExtensionsLoadedFromDirectory(
ExtensionList* new_extensions) {
extensions_.insert(extensions_.end(), new_extensions->begin(),
new_extensions->end());
// Tell UserScriptMaster about any scripts in the loaded extensions.
for (ExtensionList::iterator extension = extensions_.begin();
extension != extensions_.end(); ++extension) {
const UserScriptList& scripts = (*extension)->user_scripts();
for (UserScriptList::const_iterator script = scripts.begin();
script != scripts.end(); ++script) {
user_script_master_->AddLoneScript(*script);
}
}
// Tell UserScriptMaster to also watch the extensions directory for changes
// and then kick off the first scan.
// TODO(aa): This should go away when we implement the --extension flag, since
// developing scripts in the Extensions directory will no longer be a common
// use-case.
user_script_master_->AddWatchedPath(install_directory_);
user_script_master_->StartScan();
NotificationService::current()->Notify(NOTIFY_EXTENSIONS_LOADED,
NotificationService::AllSources(),
Details<ExtensionList>(new_extensions));
delete new_extensions;
}
void ExtensionsService::OnExtensionLoadError(const std::string& error) {
// TODO(aa): Print the error message out somewhere better. I think we are
// going to need some sort of 'extension inspector'.
LOG(WARNING) << error;
}
// ExtensionsServicesBackend
bool ExtensionsServiceBackend::LoadExtensionsFromDirectory(
const FilePath& path_in,
scoped_refptr<ExtensionsServiceFrontendInterface> frontend) {
FilePath path = path_in;
if (!file_util::AbsolutePath(&path))
NOTREACHED();
// Find all child directories in the install directory and load their
// manifests. Post errors and results to the frontend.
scoped_ptr<ExtensionList> extensions(new ExtensionList);
file_util::FileEnumerator enumerator(path,
false, // not recursive
file_util::FileEnumerator::DIRECTORIES);
for (FilePath child_path = enumerator.Next(); !child_path.value().empty();
child_path = enumerator.Next()) {
FilePath manifest_path =
child_path.AppendASCII(Extension::kManifestFilename);
if (!file_util::PathExists(manifest_path)) {
ReportExtensionLoadError(frontend.get(), child_path.ToWStringHack(),
Extension::kInvalidManifestError);
continue;
}
JSONFileValueSerializer serializer(manifest_path.ToWStringHack());
std::string error;
scoped_ptr<Value> root(serializer.Deserialize(&error));
if (!root.get()) {
ReportExtensionLoadError(frontend.get(), child_path.ToWStringHack(),
error);
continue;
}
if (!root->IsType(Value::TYPE_DICTIONARY)) {
ReportExtensionLoadError(frontend.get(), child_path.ToWStringHack(),
Extension::kInvalidManifestError);
continue;
}
scoped_ptr<Extension> extension(new Extension(child_path));
if (!extension->InitFromValue(*static_cast<DictionaryValue*>(root.get()),
&error)) {
ReportExtensionLoadError(frontend.get(), child_path.ToWStringHack(),
error);
continue;
}
extensions->push_back(extension.release());
}
ReportExtensionsLoaded(frontend.get(), extensions.release());
return true;
}
void ExtensionsServiceBackend::ReportExtensionLoadError(
ExtensionsServiceFrontendInterface *frontend, const std::wstring& path,
const std::string &error) {
std::string message = StringPrintf("Could not load extension from '%s'. %s",
WideToASCII(path).c_str(), error.c_str());
frontend->GetMessageLoop()->PostTask(FROM_HERE, NewRunnableMethod(
frontend, &ExtensionsServiceFrontendInterface::OnExtensionLoadError,
message));
}
void ExtensionsServiceBackend::ReportExtensionsLoaded(
ExtensionsServiceFrontendInterface *frontend, ExtensionList* extensions) {
frontend->GetMessageLoop()->PostTask(FROM_HERE, NewRunnableMethod(
frontend,
&ExtensionsServiceFrontendInterface::OnExtensionsLoadedFromDirectory,
extensions));
}
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