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// Copyright 2019 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 CONTENT_BROWSER_APPCACHE_APPCACHE_BACKFILLERS_H_
#define CONTENT_BROWSER_APPCACHE_APPCACHE_BACKFILLERS_H_
#include <string>
#include "base/optional.h"
#include "sql/database.h"
namespace content {
// Backfills an AppCache database after it has been migrated to version 8.
class AppCacheBackfillerVersion8 {
public:
// |db| must outlive this instance.
explicit AppCacheBackfillerVersion8(sql::Database* db) : db_(db) {}
// Populates the |padding_size| column in the Caches and Entries tables.
//
// The |padding_size| columns were added in version 8 of the schema.
bool BackfillPaddingSizes();
private:
// Iterates over each Entry record for a cache; execute |callable| on each
// iteration.
//
// ForEachCallable: (int64_t cache_id, int64_t group_id) -> bool.
//
// Returns whether the database queries succeeded.
template <typename ForEachCallable>
bool ForEachEntry(int64_t cache_id, const ForEachCallable& callable);
// Gets the manifest URL of a group. Returns base::nullopt if the database
// query failed.
base::Optional<std::string> GetManifestUrlForGroup(int64_t group_id);
// Updates the padding size of the Entry record identified by |response_id|.
// Returns whether the database statement succeeded.
bool UpdateEntryPaddingSize(int64_t padding_size, int64_t response_id);
// Updates the padding size of the Cache record identified by |cache_id|.
// Returns whether the database statement succeeded.
bool UpdateCachePaddingSize(int64_t padding_size, int64_t cache_id);
// The AppCacheDatabase instance being backfilled.
sql::Database* const db_;
};
// Backfills an AppCache database after it has been migrated to version 9.
class AppCacheBackfillerVersion9 {
public:
// |db| must outlive this instance.
explicit AppCacheBackfillerVersion9(sql::Database* db) : db_(db) {}
// Populates the |manifest_parser_version| and |manifest_scope| columns in the
// Groups table.
//
// These columns were added in version 9 of the schema.
bool BackfillManifestParserVersionAndScope();
private:
// Updates the manifest_parser version value of the Cache record identified by
// |cache_id|.
// Returns whether the database statement succeeded.
bool UpdateCacheManifestParserVersion(int64_t cache_id,
int64_t manifest_parser_version);
// Updates the manifest_scope value of the Cache record identified by
// |cache_id|.
// Returns whether the database statement succeeded.
bool UpdateCacheManifestScope(int64_t cache_id,
const std::string& manifest_scope);
base::Optional<std::string> GetManifestUrlForGroup(int64_t group_id);
// The AppCacheDatabase instance being backfilled.
sql::Database* const db_;
};
} // namespace content
#endif // CONTENT_BROWSER_APPCACHE_APPCACHE_BACKFILLERS_H_
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