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// Copyright 2008, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// NOTE: This class is currently unsed. The plan is to move bookmarks
// out of the history db using this class and BookmarksCodec instead
// (bug 1256202).
#include "chrome/browser/bookmark_storage.h"
#include "base/file_util.h"
#include "base/json_writer.h"
#include "base/message_loop.h"
#include "chrome/browser/bookmark_bar_model.h"
#include "chrome/browser/bookmark_codec.h"
#include "chrome/browser/profile.h"
#include "chrome/common/json_value_serializer.h"
namespace {
// Extension used for backup files (copy of main file created during startup).
const wchar_t* const kBackupExtension = L"bak";
// Extension for the temporary file. We write to the temp file than move to
// kBookmarksFileName.
const wchar_t* const kTmpExtension = L"tmp";
// Name of file containing bookmarks.
const wchar_t* const kBookmarksFileName = L"bookmarks.json";
// How often we save.
static const int kSaveDelayMS = 2500;
class BookmarkStorageBackend :
public base::RefCountedThreadSafe<BookmarkStorageBackend> {
public:
explicit BookmarkStorageBackend(const std::wstring& path);
// Writes the specified value to disk. This takes ownership of |value| and
// deletes it when done.
void Write(Value* value);
// Reads the bookmarks from kBookmarksFileName. Notifies |service| with
// the results on the specified MessageLoop.
void Read(scoped_refptr<BookmarkStorage> service,
MessageLoop* message_loop);
private:
// Path we read/write to.
const std::wstring path_;
DISALLOW_EVIL_CONSTRUCTORS(BookmarkStorageBackend);
};
BookmarkStorageBackend::BookmarkStorageBackend(const std::wstring& path)
: path_(path) {
// Make a backup of the current file.
std::wstring backup_path = path;
file_util::ReplaceExtension(&backup_path, kBackupExtension);
file_util::CopyFile(path, backup_path);
}
void BookmarkStorageBackend::Write(Value* value) {
DCHECK(value);
// We own Value.
scoped_ptr<Value> value_ref(value);
std::string content;
JSONWriter::Write(value, true, &content);
// Write to a temp file, then rename.
std::wstring tmp_file = path_;
file_util::ReplaceExtension(&tmp_file, kTmpExtension);
int bytes_written = file_util::WriteFile(tmp_file, content.c_str(),
static_cast<int>(content.length()));
if (bytes_written != -1) {
MoveFileEx(tmp_file.c_str(), path_.c_str(),
MOVEFILE_COPY_ALLOWED | MOVEFILE_REPLACE_EXISTING);
}
}
void BookmarkStorageBackend::Read(scoped_refptr<BookmarkStorage> service,
MessageLoop* message_loop) {
JSONFileValueSerializer serializer(path_);
Value* root = NULL;
serializer.Deserialize(&root);
// BookmarkStorage takes ownership of root.
message_loop->PostTask(FROM_HERE, NewRunnableMethod(
service.get(), &BookmarkStorage::LoadedBookmarks, root));
}
} // namespace
BookmarkStorage::BookmarkStorage(Profile* profile, BookmarkBarModel* model)
: model_(model),
#pragma warning(suppress: 4355) // Okay to pass "this" here.
save_factory_(this) {
std::wstring path = profile->GetPath();
file_util::AppendToPath(&path, kBookmarksFileName);
backend_ = new BookmarkStorageBackend(path);
}
void BookmarkStorage::LoadBookmarks() {
backend_thread()->message_loop()->PostTask(
FROM_HERE,
NewRunnableMethod(backend_.get(), &BookmarkStorageBackend::Read,
scoped_refptr<BookmarkStorage>(this),
MessageLoop::current()));
}
void BookmarkStorage::ScheduleSave() {
if (save_factory_.empty()) {
MessageLoop::current()->PostDelayedTask(
FROM_HERE, save_factory_.NewRunnableMethod(&BookmarkStorage::SaveNow),
kSaveDelayMS);
}
}
void BookmarkStorage::BookmarkModelDeleted() {
if (!save_factory_.empty()) {
// There's a pending save. We need to save now as otherwise by the time
// SaveNow is invoked the model is gone.
save_factory_.RevokeAll();
SaveNow();
}
model_ = NULL;
}
void BookmarkStorage::LoadedBookmarks(Value* root_value) {
scoped_ptr<Value> value_ref(root_value);
if (model_) {
if (root_value) {
BookmarkCodec codec;
codec.Decode(model_, *root_value);
}
// TODO(sky): bug 1256202 need to invoke a method back on the model telling
// it all has loaded.
}
}
void BookmarkStorage::SaveNow() {
if (!model_ || !model_->IsLoaded()) {
// We should only get here if we have a valid model and it's finished
// loading.
NOTREACHED();
return;
}
BookmarkCodec codec;
Value* value = codec.Encode(model_);
// The backend deletes value in write.
backend_thread()->message_loop()->PostTask(
FROM_HERE,
NewRunnableMethod(backend_.get(), &BookmarkStorageBackend::Write,
value));
}
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