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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 "examples/daemon/common/daemon.h"
#include <weave/device.h>
#include <base/bind.h>
#include <base/memory/weak_ptr.h>
#include <bitset>
namespace {
// Supported LED count on this device
const size_t kLedCount = 3;
const char kTraits[] = R"({
"_ledflasher": {
"commands": {
"set": {
"minimalRole": "user",
"parameters": {
"led": {
"type": "integer",
"minimum": 1,
"maximum": 3
},
"on": { "type": "boolean" }
}
},
"toggle": {
"minimalRole": "user",
"parameters": {
"led": {
"type": "integer",
"minimum": 1,
"maximum": 3
}
}
}
},
"state": {
"leds": {
"type": "array",
"items": { "type": "boolean" }
}
}
}
})";
const char kComponent[] = "ledflasher";
} // namespace
// LedFlasherHandler is a complete command handler example that shows
// how to handle commands that modify device state.
class LedFlasherHandler {
public:
LedFlasherHandler() {}
void Register(weave::Device* device) {
device_ = device;
device->AddTraitDefinitionsFromJson(kTraits);
CHECK(device->AddComponent(kComponent, {"_ledflasher"}, nullptr));
UpdateLedState();
device->AddCommandHandler(
kComponent, "_ledflasher.toggle",
base::Bind(&LedFlasherHandler::OnFlasherToggleCommand,
weak_ptr_factory_.GetWeakPtr()));
device->AddCommandHandler(
kComponent, "_ledflasher.set",
base::Bind(&LedFlasherHandler::OnFlasherSetCommand,
weak_ptr_factory_.GetWeakPtr()));
}
private:
void OnFlasherSetCommand(const std::weak_ptr<weave::Command>& command) {
auto cmd = command.lock();
if (!cmd)
return;
LOG(INFO) << "received command: " << cmd->GetName();
int32_t led_index = 0;
const auto& params = cmd->GetParameters();
bool cmd_value = false;
if (params.GetInteger("_led", &led_index) &&
params.GetBoolean("_on", &cmd_value)) {
// Display this command in terminal
LOG(INFO) << cmd->GetName() << " _led: " << led_index
<< ", _on: " << (cmd_value ? "true" : "false");
led_index--;
int new_state = cmd_value ? 1 : 0;
int cur_state = led_status_[led_index];
led_status_[led_index] = new_state;
if (cmd_value != cur_state) {
UpdateLedState();
}
cmd->Complete({}, nullptr);
return;
}
weave::ErrorPtr error;
weave::Error::AddTo(&error, FROM_HERE, "invalid_parameter_value",
"Invalid parameters");
cmd->Abort(error.get(), nullptr);
}
void OnFlasherToggleCommand(const std::weak_ptr<weave::Command>& command) {
auto cmd = command.lock();
if (!cmd)
return;
LOG(INFO) << "received command: " << cmd->GetName();
const auto& params = cmd->GetParameters();
int32_t led_index = 0;
if (params.GetInteger("_led", &led_index)) {
LOG(INFO) << cmd->GetName() << " _led: " << led_index;
led_index--;
led_status_[led_index] = ~led_status_[led_index];
UpdateLedState();
cmd->Complete({}, nullptr);
return;
}
weave::ErrorPtr error;
weave::Error::AddTo(&error, FROM_HERE, "invalid_parameter_value",
"Invalid parameters");
cmd->Abort(error.get(), nullptr);
}
void UpdateLedState() {
base::ListValue list;
for (uint32_t i = 0; i < led_status_.size(); i++)
list.AppendBoolean(led_status_[i] ? true : false);
device_->SetStateProperty(kComponent, "_ledflasher.leds", list, nullptr);
}
weave::Device* device_{nullptr};
// Simulate LED status on this device so client app could explore
// Each bit represents one device, indexing from LSB
std::bitset<kLedCount> led_status_{0};
base::WeakPtrFactory<LedFlasherHandler> weak_ptr_factory_{this};
};
int main(int argc, char** argv) {
Daemon::Options opts;
if (!opts.Parse(argc, argv)) {
Daemon::Options::ShowUsage(argv[0]);
return 1;
}
Daemon daemon{opts};
LedFlasherHandler handler;
handler.Register(daemon.GetDevice());
daemon.Run();
return 0;
}
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