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// Copyright 2013 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 COMPONENTS_PRECACHE_CORE_PRECACHE_URL_TABLE_H_
#define COMPONENTS_PRECACHE_CORE_PRECACHE_URL_TABLE_H_
#include <map>
#include "base/macros.h"
#include "base/time/time.h"
#include "url/gurl.h"
namespace sql {
class Connection;
}
namespace precache {
// Interface for database table that keeps track of the URLs that have been
// precached but not used. Each row in this table represents a URL that was
// precached over the network, and has not been fetched through user browsing
// since then. Manages one table { URL (primary key), precache timestamp }.
class PrecacheURLTable {
public:
PrecacheURLTable();
~PrecacheURLTable();
// Initialize the precache URL table for use with the specified database
// connection. The caller keeps ownership of |db|, and |db| must not be NULL.
// Init must be called before any other methods.
bool Init(sql::Connection* db);
// Adds a precached URL to the table, using the current time as the
// precache timestamp. Replaces the row if one already exists.
void AddURL(const GURL& url, const base::Time& precache_time);
// Returns true if this URL exists in the table.
bool HasURL(const GURL& url);
// Deletes the row from the table that has the given URL, if it exists.
void DeleteURL(const GURL& url);
// Deletes entries that were precached before the time of |delete_end|.
void DeleteAllPrecachedBefore(const base::Time& delete_end);
// Delete all entries.
void DeleteAll();
// Used by tests to get the contents of the table.
void GetAllDataForTesting(std::map<GURL, base::Time>* map);
private:
bool CreateTableIfNonExistent();
// Non-owned pointer.
sql::Connection* db_;
DISALLOW_COPY_AND_ASSIGN(PrecacheURLTable);
};
} // namespace precache
#endif // COMPONENTS_PRECACHE_CORE_PRECACHE_URL_TABLE_H_
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