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// Copyright 2017 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef COBALT_DOM_EME_MEDIA_KEY_STATUS_MAP_H_
#define COBALT_DOM_EME_MEDIA_KEY_STATUS_MAP_H_
#include <map>
#include <string>
#include "base/memory/ref_counted.h"
#include "cobalt/dom/buffer_source.h"
#include "cobalt/dom/eme/media_key_status.h"
#include "cobalt/script/callback_function.h"
#include "cobalt/script/environment_settings.h"
#include "cobalt/script/script_value.h"
#include "cobalt/script/wrappable.h"
namespace cobalt {
namespace dom {
namespace eme {
// Represents a read-only map of key IDs to the current status of the associated
// key.
// https://www.w3.org/TR/encrypted-media/#mediakeystatusmap-interface
class MediaKeyStatusMap : public script::Wrappable {
public:
typedef script::CallbackFunction<void(
const std::string&, const BufferSource&,
const scoped_refptr<MediaKeyStatusMap>&)>
ForEachCallback;
typedef script::ScriptValue<ForEachCallback> ForEachCallbackArg;
// Custom, not in any spec.
//
MediaKeyStatusMap() {}
void Clear() { key_statuses_.clear(); }
void Add(const std::string& key_id, MediaKeyStatus key_status);
// Web IDL: MediaKeyStatusMap.
//
uint32_t size() const { return static_cast<uint32_t>(key_statuses_.size()); }
MediaKeyStatus Get(const BufferSource& key_id) const {
std::string key_id_copy = GetStringFromBufferSource(key_id);
const auto& iter = key_statuses_.find(key_id_copy);
// TODO: Return "undefined" if `key_id` cannot be found.
return iter == key_statuses_.end() ? kMediaKeyStatusInternalError
: iter->second;
}
bool Has(const BufferSource& key_id) const {
std::string key_id_copy = GetStringFromBufferSource(key_id);
return key_statuses_.find(key_id_copy) != key_statuses_.end();
}
void ForEach(script::EnvironmentSettings* settings,
const ForEachCallbackArg& callback);
DEFINE_WRAPPABLE_TYPE(MediaKeyStatusMap);
private:
static std::string GetStringFromBufferSource(
const BufferSource& buffer_source) {
const uint8* buffer;
int buffer_size;
GetBufferAndSize(buffer_source, &buffer, &buffer_size);
DCHECK(buffer);
DCHECK_GE(buffer_size, 0);
if (buffer && buffer_size > 0) {
return std::string(buffer, buffer + buffer_size);
}
return "";
}
std::map<std::string, MediaKeyStatus> key_statuses_;
DISALLOW_COPY_AND_ASSIGN(MediaKeyStatusMap);
};
} // namespace eme
} // namespace dom
} // namespace cobalt
#endif // COBALT_DOM_EME_MEDIA_KEY_STATUS_MAP_H_