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// Copyright 2015 The Weave 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 "src/commands/command_queue.h"
#include <base/bind.h>
#include <base/time/time.h>
namespace weave {
namespace {
const int kRemoveCommandDelayMin = 5;
std::string GetCommandHandlerKey(const std::string& component_path,
const std::string& command_name) {
return component_path + ":" + command_name;
}
}
void CommandQueue::AddCommandAddedCallback(const CommandCallback& callback) {
on_command_added_.push_back(callback);
// Send all pre-existed commands.
for (const auto& command : map_)
callback.Run(command.second.get());
}
void CommandQueue::AddCommandRemovedCallback(const CommandCallback& callback) {
on_command_removed_.push_back(callback);
}
void CommandQueue::AddCommandHandler(
const std::string& component_path,
const std::string& command_name,
const Device::CommandHandlerCallback& callback) {
if (!command_name.empty()) {
CHECK(default_command_callback_.is_null())
<< "Commands specific handler are not allowed after default one";
for (const auto& command : map_) {
if (command.second->GetState() == Command::State::kQueued &&
command.second->GetName() == command_name &&
command.second->GetComponent() == component_path) {
callback.Run(command.second);
}
}
std::string key = GetCommandHandlerKey(component_path, command_name);
CHECK(command_callbacks_.insert(std::make_pair(key, callback)).second)
<< command_name << " already has handler";
} else {
CHECK(component_path.empty())
<< "Default handler must not be component-specific";
for (const auto& command : map_) {
std::string key = GetCommandHandlerKey(command.second->GetComponent(),
command.second->GetName());
if (command.second->GetState() == Command::State::kQueued &&
command_callbacks_.find(key) == command_callbacks_.end()) {
callback.Run(command.second);
}
}
CHECK(default_command_callback_.is_null()) << "Already has default handler";
default_command_callback_ = callback;
}
}
void CommandQueue::Add(std::unique_ptr<CommandInstance> instance) {
std::string id = instance->GetID();
LOG_IF(FATAL, id.empty()) << "Command has no ID";
instance->AttachToQueue(this);
auto pair = map_.insert(std::make_pair(id, std::move(instance)));
LOG_IF(FATAL, !pair.second) << "Command with ID '" << id
<< "' is already in the queue";
for (const auto& cb : on_command_added_)
cb.Run(pair.first->second.get());
std::string key = GetCommandHandlerKey(pair.first->second->GetComponent(),
pair.first->second->GetName());
auto it_handler = command_callbacks_.find(key);
if (it_handler != command_callbacks_.end())
it_handler->second.Run(pair.first->second);
else if (!default_command_callback_.is_null())
default_command_callback_.Run(pair.first->second);
Cleanup();
}
void CommandQueue::RemoveLater(const std::string& id) {
auto p = map_.find(id);
if (p == map_.end())
return;
remove_queue_.push(std::make_pair(
base::Time::Now() + base::TimeDelta::FromMinutes(kRemoveCommandDelayMin),
id));
Cleanup();
}
bool CommandQueue::Remove(const std::string& id) {
auto p = map_.find(id);
if (p == map_.end())
return false;
std::shared_ptr<CommandInstance> instance = p->second;
instance->DetachFromQueue();
map_.erase(p);
for (const auto& cb : on_command_removed_)
cb.Run(instance.get());
return true;
}
void CommandQueue::Cleanup() {
while (!remove_queue_.empty() && remove_queue_.front().first < Now()) {
Remove(remove_queue_.front().second);
remove_queue_.pop();
}
}
void CommandQueue::SetNowForTest(base::Time now) {
test_now_ = now;
}
base::Time CommandQueue::Now() const {
return test_now_.is_null() ? base::Time::Now() : test_now_;
}
CommandInstance* CommandQueue::Find(const std::string& id) const {
auto p = map_.find(id);
return (p != map_.end()) ? p->second.get() : nullptr;
}
} // namespace weave
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