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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.
#include "content/browser/sms/sms_queue.h"
#include "base/callback.h"
#include "base/optional.h"
namespace content {
SmsQueue::SmsQueue() = default;
SmsQueue::~SmsQueue() = default;
void SmsQueue::Push(const url::Origin& origin, Subscriber* subscriber) {
subscribers_[origin].AddObserver(subscriber);
}
SmsQueue::Subscriber* SmsQueue::Pop(const url::Origin& origin) {
auto it = subscribers_.find(origin);
if (it == subscribers_.end())
return nullptr;
base::ObserverList<Subscriber>& subscribers = it->second;
Subscriber& subscriber = *(subscribers.begin());
Remove(origin, &subscriber);
return &subscriber;
}
void SmsQueue::Remove(const url::Origin& origin, Subscriber* subscriber) {
auto it = subscribers_.find(origin);
if (it == subscribers_.end())
return;
base::ObserverList<Subscriber>& queue = it->second;
queue.RemoveObserver(subscriber);
if (queue.begin() == queue.end())
subscribers_.erase(it);
}
bool SmsQueue::HasSubscribers() {
return !subscribers_.empty();
}
bool SmsQueue::HasSubscriber(const url::Origin& origin,
const Subscriber* subscriber) {
return (subscribers_.find(origin) != subscribers_.end()) &&
subscribers_[origin].HasObserver(subscriber);
}
} // namespace content
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