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// Copyright 2025 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/indexed_db/instance/sqlite/backing_store_impl.h"
#include <vector>
#include "base/files/file_enumerator.h"
#include "base/files/file_path.h"
#include "base/files/file_util.h"
#include "base/notimplemented.h"
#include "content/browser/indexed_db/file_path_util.h"
#include "content/browser/indexed_db/indexed_db_data_loss_info.h"
#include "content/browser/indexed_db/instance/sqlite/backing_store_database_impl.h"
#include "content/browser/indexed_db/instance/sqlite/database_connection.h"
#include "content/browser/indexed_db/status.h"
namespace content::indexed_db::sqlite {
std::tuple<std::unique_ptr<BackingStore>, Status, IndexedDBDataLossInfo, bool>
BackingStoreImpl::OpenAndVerify(
base::FilePath directory,
storage::mojom::BlobStorageContext& blob_storage_context) {
return {
std::make_unique<BackingStoreImpl>(std::move(directory),
blob_storage_context),
Status::OK(),
IndexedDBDataLossInfo(),
false,
};
}
BackingStoreImpl::BackingStoreImpl(
base::FilePath directory,
storage::mojom::BlobStorageContext& blob_storage_context)
: directory_(std::move(directory)),
blob_storage_context_(blob_storage_context) {}
BackingStoreImpl::~BackingStoreImpl() = default;
bool BackingStoreImpl::CanOpportunisticallyClose() const {
// In-memory stores have to stay alive.
if (in_memory()) {
return false;
}
// There's not much of a point in deleting `this` since it doesn't use many
// resources (just a tiny amount of memory). But for now, match the logic of
// the LevelDB store, where `this` is cleaned up if there are no active
// databases and no blobs. This is as simple as checking if there are any
// `DatabaseConnection` objects.
return open_connections_.empty();
}
void BackingStoreImpl::TearDown(base::WaitableEvent* signal_on_destruction) {
NOTIMPLEMENTED();
signal_on_destruction->Signal();
}
void BackingStoreImpl::InvalidateBlobReferences() {
NOTIMPLEMENTED();
}
void BackingStoreImpl::StartPreCloseTasks(base::OnceClosure on_done) {
NOTIMPLEMENTED();
std::move(on_done).Run();
}
void BackingStoreImpl::StopPreCloseTasks() {}
int64_t BackingStoreImpl::GetInMemorySize() const {
uint64_t total_size = 0;
for (const auto& [_, connection] : open_connections_) {
total_size += connection->GetInMemorySize();
}
return total_size;
}
StatusOr<bool> BackingStoreImpl::DatabaseExists(std::u16string_view name) {
if (auto it = open_connections_.find(std::u16string(name));
it != open_connections_.end()) {
return !it->second->IsZygotic();
}
if (in_memory()) {
return false;
}
return base::PathExists(directory_.Append(DatabaseNameToFileName(name)));
}
StatusOr<std::vector<blink::mojom::IDBNameAndVersionPtr>>
BackingStoreImpl::GetDatabaseNamesAndVersions() {
std::vector<blink::mojom::IDBNameAndVersionPtr> names_and_versions;
std::set<base::FilePath> already_open_file_names;
for (const auto& [name, db] : open_connections_) {
already_open_file_names.insert(DatabaseNameToFileName(name));
// indexedDB.databases() is meant to return *committed* database state, i.e.
// should not include in-progress VersionChange updates. This is verified by
// external/wpt/IndexedDB/get-databases.any.html
int64_t version = db->GetCommittedVersion();
if (version == blink::IndexedDBDatabaseMetadata::NO_VERSION) {
continue;
}
names_and_versions.emplace_back(
blink::mojom::IDBNameAndVersion::New(name, version));
}
if (!in_memory()) {
EnumerateDatabasesInDirectory(directory_, [&](const base::FilePath& path) {
if (already_open_file_names.contains(path.BaseName())) {
return;
}
std::ignore =
DatabaseConnection::Open(/*name=*/{}, path, *this)
.transform([&](std::unique_ptr<DatabaseConnection> connection) {
names_and_versions.emplace_back(
blink::mojom::IDBNameAndVersion::New(
connection->metadata().name,
connection->metadata().version));
});
});
}
return names_and_versions;
}
StatusOr<std::unique_ptr<BackingStore::Database>>
BackingStoreImpl::CreateOrOpenDatabase(const std::u16string& name) {
if (auto it = open_connections_.find(name); it != open_connections_.end()) {
return std::make_unique<BackingStoreDatabaseImpl>(it->second->GetWeakPtr());
}
base::FilePath db_path =
in_memory() ? base::FilePath()
: directory_.Append(DatabaseNameToFileName(name));
return DatabaseConnection::Open(name, std::move(db_path), *this)
.transform([&](std::unique_ptr<DatabaseConnection> connection) {
auto database = std::make_unique<BackingStoreDatabaseImpl>(
connection->GetWeakPtr());
open_connections_[name] = std::move(connection);
return database;
});
}
uintptr_t BackingStoreImpl::GetIdentifierForMemoryDump() {
NOTIMPLEMENTED();
return 0;
}
void BackingStoreImpl::FlushForTesting() {
NOTIMPLEMENTED();
}
void BackingStoreImpl::DestroyConnection(const std::u16string& name) {
CHECK(open_connections_.erase(name) == 1);
}
} // namespace content::indexed_db::sqlite
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