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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_LAST_DOWNLOAD_FINDER_H_
#define CHROME_BROWSER_SAFE_BROWSING_LAST_DOWNLOAD_FINDER_H_
#include <vector>
#include "base/callback.h"
#include "base/compiler_specific.h"
#include "base/macros.h"
#include "base/memory/scoped_ptr.h"
#include "base/memory/weak_ptr.h"
#include "chrome/browser/history/download_row.h"
#include "content/public/browser/notification_observer.h"
#include "content/public/browser/notification_registrar.h"
class HistoryService;
class Profile;
namespace content {
class NotificationDetails;
class NotificationSource;
}
namespace history {
struct DownloadRow;
}
namespace safe_browsing {
class ClientIncidentReport_DownloadDetails;
// Finds the most recent executable downloaded by any on-the-record profile with
// history that participates in safe browsing.
class LastDownloadFinder : public content::NotificationObserver {
public:
// The type of a callback run by the finder upon completion. The argument is a
// protobuf containing details of the download that was found, or an empty
// pointer if none was found.
typedef base::Callback<void(scoped_ptr<ClientIncidentReport_DownloadDetails>)>
LastDownloadCallback;
virtual ~LastDownloadFinder();
// Initiates an asynchronous search for the most recent download. |callback|
// will be run when the search is complete. The returned instance can be
// deleted to terminate the search, in which case |callback| is not invoked.
// Returns NULL without running |callback| if there are no eligible profiles
// to search.
static scoped_ptr<LastDownloadFinder> Create(
const LastDownloadCallback& callback);
protected:
// Protected constructor so that unit tests can create a fake finder.
LastDownloadFinder();
private:
LastDownloadFinder(const std::vector<Profile*>& profiles,
const LastDownloadCallback& callback);
// Adds |profile| to the set of profiles to be searched if it is an
// on-the-record profile with history that participates in safe browsing. The
// search is initiated if the profile has already loaded history.
void SearchInProfile(Profile* profile);
// Initiates a search in |profile| if it is in the set of profiles to be
// searched.
void OnProfileHistoryLoaded(Profile* profile,
HistoryService* history_service);
// Abandons the search for downloads in |profile|, reporting results if there
// are no more pending queries.
void AbandonSearchInProfile(Profile* profile);
// HistoryService::DownloadQueryCallback. Retrieves the most recent completed
// executable download from |downloads| and reports results if there are no
// more pending queries.
void OnDownloadQuery(
Profile* profile,
scoped_ptr<std::vector<history::DownloadRow> > downloads);
// Removes the profile pointed to by |it| from profiles_ and reports results
// if there are no more pending queries.
void RemoveProfileAndReportIfDone(std::vector<Profile*>::iterator it);
// Invokes the caller-supplied callback with the download found.
void ReportResults();
// content::NotificationObserver methods.
virtual void Observe(int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) OVERRIDE;
// Caller-supplied callback to be invoked when the most recent download is
// found.
LastDownloadCallback callback_;
// The profiles for which a download query is pending.
std::vector<Profile*> profiles_;
// Registrar for observing profile lifecycle notifications.
content::NotificationRegistrar notification_registrar_;
// The most recent download, updated progressively as query results arrive.
history::DownloadRow most_recent_row_;
// A factory for asynchronous operations on profiles' HistoryService.
base::WeakPtrFactory<LastDownloadFinder> weak_ptr_factory_;
DISALLOW_COPY_AND_ASSIGN(LastDownloadFinder);
};
} // namespace safe_browsing
#endif // CHROME_BROWSER_SAFE_BROWSING_LAST_DOWNLOAD_FINDER_H_
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