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// Copyright 2014 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_SAFE_BROWSING_INCIDENT_REPORTING_DOWNLOAD_METADATA_MANAGER_H_
#define CHROME_BROWSER_SAFE_BROWSING_INCIDENT_REPORTING_DOWNLOAD_METADATA_MANAGER_H_
#include <map>
#include "base/callback_forward.h"
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "content/public/browser/download_manager.h"
namespace base {
class SequencedTaskRunner;
class SequencedWorkerPool;
}
namespace content {
class BrowserContext;
class DownloadItem;
}
namespace safe_browsing {
class ClientDownloadRequest;
class ClientIncidentReport_DownloadDetails;
class DownloadMetadata;
// A browser-wide object that manages the persistent state of metadata
// pertaining to a download.
class DownloadMetadataManager : public content::DownloadManager::Observer {
public:
// A callback run when the results of a call to GetDownloadDetails are ready.
// The supplied parameter may be null, indicating that there are no persisted
// details for the |browser_context| passed to GetDownloadDetails.
typedef base::Callback<void(scoped_ptr<ClientIncidentReport_DownloadDetails>)>
GetDownloadDetailsCallback;
// Constructs a new instance for which disk IO operations will take place in
// |worker_pool|.
explicit DownloadMetadataManager(
const scoped_refptr<base::SequencedWorkerPool>& worker_pool);
// Constructor that allows tests to provide a specific runner for
// asynchronous tasks.
explicit DownloadMetadataManager(
const scoped_refptr<base::SequencedTaskRunner>& task_runner);
~DownloadMetadataManager() override;
// Adds |download_manager| to the set observed by the metadata manager.
void AddDownloadManager(content::DownloadManager* download_manager);
// Sets |request| as the relevant metadata to persist for |download| upon
// completion. |request| will be persisted when the download completes, or
// discarded if the download is cancelled.
virtual void SetRequest(content::DownloadItem* download,
const ClientDownloadRequest* request);
// Gets the persisted DownloadDetails for |browser_context|. |callback| will
// be run immediately if the data is available. Otherwise, it will be run
// later on the caller's thread.
virtual void GetDownloadDetails(content::BrowserContext* browser_context,
const GetDownloadDetailsCallback& callback);
protected:
// Returns the DownloadManager for a given BrowserContext. Virtual for tests.
virtual content::DownloadManager* GetDownloadManagerForBrowserContext(
content::BrowserContext* context);
// content::DownloadManager:Observer methods.
void OnDownloadCreated(content::DownloadManager* download_manager,
content::DownloadItem* item) override;
void ManagerGoingDown(content::DownloadManager* download_manager) override;
private:
class ManagerContext;
// A mapping of DownloadManagers to their corresponding contexts.
typedef std::map<content::DownloadManager*, ManagerContext*>
ManagerToContextMap;
// A task runner to which read tasks are posted.
scoped_refptr<base::SequencedTaskRunner> read_runner_;
// A task runner to which write tasks are posted.
scoped_refptr<base::SequencedTaskRunner> write_runner_;
// Contexts for each DownloadManager that has been added and has not yet
// "gone down".
ManagerToContextMap contexts_;
DISALLOW_COPY_AND_ASSIGN(DownloadMetadataManager);
};
} // namespace safe_browsing
#endif // CHROME_BROWSER_SAFE_BROWSING_INCIDENT_REPORTING_DOWNLOAD_METADATA_MANAGER_H_
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