blob: 31378eaace9c65a08c449d686e5f37bf5d725070 [file] [log] [blame]
// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <memory>
#include <string>
#include "base/containers/flat_map.h"
#include "base/no_destructor.h"
#include "base/sequence_checker.h"
#include "base/values.h"
namespace chromecast {
// This class is for use by both browser- and renderer-side, and tracks data
// that can be exposed directly to applications via JS APIs. The browser-side
// code uses it to expose key/value to renderer. The ipc to renderer is done by
// binding QueryableDataStorePointer on browser side to the implementation on
// the renderer side and calling the Set method.
// All methods should be accessed on the main thread.
// TODO(mdellaquila): Change the class implementation so that an instance of it
// is created for each RenderFrame
class QueryableData {
using ValueMap = base::flat_map<std::string, base::Value>;
QueryableData(const QueryableData&) = delete;
QueryableData& operator=(const QueryableData&) = delete;
// Stores a value for the current process. If the key already exists, the
// value is replaced.
static void RegisterQueryableValue(const std::string& query_key,
base::Value initial_value);
// Returns a pointer to the value for given key, if found, or null if not.
static const base::Value* Query(const std::string& query_key);
static const ValueMap& GetValues();
friend class base::NoDestructor<QueryableData>;
ValueMap queryable_values_;
} // namespace chromecast