// Copyright 2015 The Cobalt Authors. 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.

#include "cobalt/debug/console/debugger_event_target.h"

#include "cobalt/base/source_location.h"

namespace cobalt {
namespace debug {
namespace console {

DebuggerEventTarget::DebuggerEventTarget() {}

DebuggerEventTarget::~DebuggerEventTarget() {
  // Delete all registered listeners.
  for (ListenerSet::const_iterator it = listeners_.begin();
       it != listeners_.end(); ++it) {
    delete *it;
  }
}

void DebuggerEventTarget::DispatchEvent(
    const std::string& method, const base::Optional<std::string>& json_params) {
  base::AutoLock auto_lock(lock_);

  for (ListenerSet::const_iterator it = listeners_.begin();
       it != listeners_.end(); ++it) {
    ListenerInfo* listener = *it;
    DCHECK(listener->task_runner);
    listener->task_runner->PostTask(
        FROM_HERE,
        base::Bind(&DebuggerEventTarget::NotifyListener, base::Unretained(this),
                   base::Unretained(listener), method, json_params));
  }
}

void DebuggerEventTarget::AddListener(
    const DebuggerEventTarget::DebuggerEventCallbackArg& callback) {
  base::AutoLock auto_lock(lock_);
  listeners_.insert(new ListenerInfo(
      this, callback, base::MessageLoop::current()->task_runner()));
}

void DebuggerEventTarget::NotifyListener(
    const DebuggerEventTarget::ListenerInfo* listener,
    const std::string& method, const base::Optional<std::string>& json_params) {
  DCHECK_EQ(base::MessageLoop::current()->task_runner(), listener->task_runner);
  listener->callback.value().Run(method, json_params);
}

}  // namespace console
}  // namespace debug
}  // namespace cobalt