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// Copyright 2014 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 "components/copresence/handlers/audio/audio_directive_list.h"
namespace copresence {
// Public functions.
AudioDirective::AudioDirective() {}
AudioDirective::AudioDirective(const std::string& op_id,
base::TimeTicks end_time,
const Directive& server_directive)
: op_id(op_id),
end_time(end_time),
server_directive(server_directive) {}
AudioDirectiveList::AudioDirectiveList(
const scoped_refptr<TickClockRefCounted>& clock)
: clock_(clock) {}
AudioDirectiveList::~AudioDirectiveList() {}
void AudioDirectiveList::AddDirective(const std::string& op_id,
const Directive& server_directive) {
base::TimeTicks end_time = clock_->NowTicks() +
base::TimeDelta::FromMilliseconds(server_directive.ttl_millis());
// If this op is already in the list, update it instead of adding it again.
auto it = FindDirectiveByOpId(op_id);
if (it != active_directives_.end()) {
it->end_time = end_time;
std::make_heap(active_directives_.begin(),
active_directives_.end(),
LatestFirstComparator());
return;
}
active_directives_.push_back(
AudioDirective(op_id, end_time, server_directive));
std::push_heap(active_directives_.begin(),
active_directives_.end(),
LatestFirstComparator());
}
void AudioDirectiveList::RemoveDirective(const std::string& op_id) {
auto it = FindDirectiveByOpId(op_id);
if (it != active_directives_.end())
active_directives_.erase(it);
std::make_heap(active_directives_.begin(),
active_directives_.end(),
LatestFirstComparator());
}
scoped_ptr<AudioDirective> AudioDirectiveList::GetActiveDirective() {
// The top is always the instruction that is ending the latest.
// If that time has passed, all our previous instructions have expired too.
// So we clear the list.
if (active_directives_.empty() ||
active_directives_.front().end_time < clock_->NowTicks()) {
active_directives_.clear();
return scoped_ptr<AudioDirective>();
}
return make_scoped_ptr(new AudioDirective(active_directives_.front()));
}
const std::vector<AudioDirective>& AudioDirectiveList::directives() const {
return active_directives_;
}
// Private functions.
std::vector<AudioDirective>::iterator AudioDirectiveList::FindDirectiveByOpId(
const std::string& op_id) {
for (auto it = active_directives_.begin();
it != active_directives_.end();
++it) {
if (it->op_id == op_id)
return it;
}
return active_directives_.end();
}
} // namespace copresence
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