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// 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.
#ifndef CHROME_BROWSER_CHROMEOS_DRIVE_DRIVE_FEED_PROCESSOR_H_
#define CHROME_BROWSER_CHROMEOS_DRIVE_DRIVE_FEED_PROCESSOR_H_
#include <map>
#include <set>
#include <string>
#include <vector>
#include "base/file_path.h"
#include "chrome/browser/chromeos/drive/drive_file_error.h"
#include "chrome/browser/google_apis/gdata_errorcode.h"
#include "chrome/browser/google_apis/gdata_wapi_parser.h"
namespace drive {
class DriveDirectory;
class DriveEntry;
class DriveResourceMetadata;
typedef std::map<std::string /* resource_id */, DriveEntry*>
FileResourceIdMap;
// Struct used to record UMA stats with FeedToFileResourceMap().
struct FeedToFileResourceMapUmaStats {
FeedToFileResourceMapUmaStats();
~FeedToFileResourceMapUmaStats();
int num_regular_files;
int num_hosted_documents;
};
// DriveFeedProcessor is used to process feeds from WAPI (codename for
// Documents List API).
class DriveFeedProcessor {
public:
explicit DriveFeedProcessor(DriveResourceMetadata* resource_metadata);
~DriveFeedProcessor();
// Applies the documents feeds to the file system using |resource_metadata_|.
//
// |start_changestamp| determines the type of feed to process. The value is
// set to zero for the root feeds, every other value is for the delta feeds.
//
// In the case of processing the root feeds |root_feed_changestamp| is used
// as its initial changestamp value. The value comes from
// gdata::AccountMetadataFeed.
DriveFileError ApplyFeeds(const ScopedVector<gdata::DocumentFeed>& feed_list,
int64 start_changestamp,
int64 root_feed_changestamp,
std::set<FilePath>* changed_dirs);
// Converts list of document feeds from collected feeds into
// FileResourceIdMap.
DriveFileError FeedToFileResourceMap(
const ScopedVector<gdata::DocumentFeed>& feed_list,
FileResourceIdMap* file_map,
int64* feed_changestamp,
FeedToFileResourceMapUmaStats* uma_stats);
private:
// Updates UMA histograms about file counts.
void UpdateFileCountUmaHistograms(
const FeedToFileResourceMapUmaStats& uma_stats) const;
// Applies the pre-processed feed from |file_map| map onto the file system.
// All entries in |file_map| will be erased (i.e. the map becomes empty),
// and values are deleted.
void ApplyFeedFromFileUrlMap(bool is_delta_feed,
int64 feed_changestamp,
FileResourceIdMap* file_map,
std::set<FilePath>* changed_dirs);
// Helper function for adding new |file| from the feed into |directory|. It
// checks the type of file and updates |changed_dirs| if this file adding
// operation needs to raise directory notification update. If file is being
// added to |orphaned_resources| such notifications are not raised since
// we ignore such files and don't add them to the file system now.
static void AddEntryToDirectoryAndCollectChangedDirectories(
DriveEntry* entry,
DriveDirectory* directory,
DriveResourceMetadata* orphaned_resources,
std::set<FilePath>* changed_dirs);
// Helper function for removing |entry| from |directory|. If |entry| is a
// directory too, it will collect all its children file paths into
// |changed_dirs| as well.
static void RemoveEntryFromDirectoryAndCollectChangedDirectories(
DriveDirectory* directory,
DriveEntry* entry,
std::set<FilePath>* changed_dirs);
// Finds directory where new |file| should be added to during feed processing.
// |orphaned_entries_dir| collects files/dirs that don't have a parent in
// either locally cached file system or in this new feed.
DriveDirectory* FindDirectoryForNewEntry(
DriveEntry* new_entry,
const FileResourceIdMap& file_map,
DriveResourceMetadata* orphaned_ressources);
DriveResourceMetadata* resource_metadata_; // Not owned.
DISALLOW_COPY_AND_ASSIGN(DriveFeedProcessor);
};
} // namespace drive
#endif // CHROME_BROWSER_CHROMEOS_DRIVE_DRIVE_FEED_PROCESSOR_H_
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