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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 COMPONENTS_PASSWORD_MANAGER_CORE_BROWSER_AFFILIATION_DATABASE_H_
#define COMPONENTS_PASSWORD_MANAGER_CORE_BROWSER_AFFILIATION_DATABASE_H_
#include <memory>
#include "base/macros.h"
#include "base/time/time.h"
#include "components/password_manager/core/browser/affiliation_utils.h"
namespace base {
class FilePath;
} // namespace base
namespace sql {
class Connection;
class Statement;
} // namespace sql
namespace password_manager {
// Stores equivalence classes of facets, i.e., facets that are affiliated with
// each other, in an SQLite database. See affiliation_utils.h for a more
// detailed definition of what this means.
//
// Under the assumption that there is most likely not much the caller can do in
// case of database errors, most methods silently ignore them. Nevertheless, the
// caller must plan ahead for this rare but non-negligible scenario, and expect
// that in odd cases basic database invariants will not hold.
class AffiliationDatabase {
public:
AffiliationDatabase();
~AffiliationDatabase();
// Opens an existing database at |path|, or creates a new one if none exists,
// and returns true on success.
bool Init(const base::FilePath& path);
// Looks up the equivalence class containing |facet_uri|, and returns true if
// such a class is found, in which case it is also stored into |result|.
bool GetAffiliationsForFacet(const FacetURI& facet_uri,
AffiliatedFacetsWithUpdateTime* result) const;
// Retrieves all stored equivalence classes.
void GetAllAffiliations(
std::vector<AffiliatedFacetsWithUpdateTime>* results) const;
// Removes the stored equivalence class, if any, containing |facet_uri|.
void DeleteAffiliationsForFacet(const FacetURI& facet_uri);
// Removes stored equivalence classes that were last updated before the
// |cutoff_threshold|.
void DeleteAffiliationsOlderThan(const base::Time& cutoff_threshold);
// Removes all records from all tables of the database.
void DeleteAllAffiliations();
// Stores the equivalence class defined by |affiliated_facets| to the DB and
// returns true unless it has a non-empty subset with a preexisting class, in
// which case no changes are made and the function returns false.
bool Store(const AffiliatedFacetsWithUpdateTime& affiliated_facets);
// Stores the equivalence class defined by |affiliated_facets| to the DB,
// database, and removes any other equivalence classes that are in conflict
// with |affiliated_facets|, i.e. those that are neither equal nor disjoint to
// it. Removed equivalence classes are stored into |removed_affiliations|.
void StoreAndRemoveConflicting(
const AffiliatedFacetsWithUpdateTime& affiliated_facets,
std::vector<AffiliatedFacetsWithUpdateTime>* removed_affiliations);
// Deletes the database file at |path| along with all its auxiliary files. The
// database must be closed before calling this.
static void Delete(const base::FilePath& path);
private:
// Creates any tables and indices that do not already exist in the database.
bool CreateTablesAndIndicesIfNeeded();
// Called when SQLite encounters an error.
void SQLErrorCallback(int error_number, sql::Statement* statement);
// The SQL connection to the database.
std::unique_ptr<sql::Connection> sql_connection_;
DISALLOW_COPY_AND_ASSIGN(AffiliationDatabase);
};
} // namespace password_manager
#endif // COMPONENTS_PASSWORD_MANAGER_CORE_BROWSER_AFFILIATION_DATABASE_H_
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