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// Copyright 2015 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 "modules/bluetooth/BluetoothRemoteGATTService.h"
#include "bindings/core/v8/ScriptPromise.h"
#include "bindings/core/v8/ScriptPromiseResolver.h"
#include "core/dom/DOMException.h"
#include "core/dom/ExceptionCode.h"
#include "core/inspector/ConsoleMessage.h"
#include "modules/bluetooth/Bluetooth.h"
#include "modules/bluetooth/BluetoothError.h"
#include "modules/bluetooth/BluetoothRemoteGATTCharacteristic.h"
#include "modules/bluetooth/BluetoothUUID.h"
#include "wtf/PtrUtil.h"
#include <utility>
namespace blink {
namespace {
const char kGATTServerDisconnected[] =
"GATT Server disconnected while retrieving characteristics.";
const char kGATTServerNotConnected[] =
"GATT Server is disconnected. Cannot retrieve characteristics.";
const char kInvalidService[] =
"Service is no longer valid. Remember to retrieve the service again after "
"reconnecting.";
} // namespace
BluetoothRemoteGATTService::BluetoothRemoteGATTService(
mojom::blink::WebBluetoothRemoteGATTServicePtr service,
bool isPrimary,
const String& deviceInstanceId,
BluetoothDevice* device)
: m_service(std::move(service)),
m_isPrimary(isPrimary),
m_deviceInstanceId(deviceInstanceId),
m_device(device) {}
DEFINE_TRACE(BluetoothRemoteGATTService) {
visitor->trace(m_device);
}
// Callback that allows us to resolve the promise with a single characteristic
// or with a vector owning the characteristics.
void BluetoothRemoteGATTService::GetCharacteristicsCallback(
const String& serviceInstanceId,
mojom::blink::WebBluetoothGATTQueryQuantity quantity,
ScriptPromiseResolver* resolver,
mojom::blink::WebBluetoothResult result,
Optional<Vector<mojom::blink::WebBluetoothRemoteGATTCharacteristicPtr>>
characteristics) {
if (!resolver->getExecutionContext() ||
resolver->getExecutionContext()->isContextDestroyed())
return;
// If the resolver is not in the set of ActiveAlgorithms then the frame
// disconnected so we reject.
if (!device()->gatt()->RemoveFromActiveAlgorithms(resolver)) {
resolver->reject(
DOMException::create(NetworkError, kGATTServerDisconnected));
return;
}
if (result == mojom::blink::WebBluetoothResult::SUCCESS) {
DCHECK(characteristics);
if (quantity == mojom::blink::WebBluetoothGATTQueryQuantity::SINGLE) {
DCHECK_EQ(1u, characteristics->size());
resolver->resolve(device()->getOrCreateRemoteGATTCharacteristic(
resolver->getExecutionContext(),
std::move(characteristics.value()[0]), this));
return;
}
HeapVector<Member<BluetoothRemoteGATTCharacteristic>> gattCharacteristics;
gattCharacteristics.reserveInitialCapacity(characteristics->size());
for (auto& characteristic : characteristics.value()) {
gattCharacteristics.push_back(
device()->getOrCreateRemoteGATTCharacteristic(
resolver->getExecutionContext(), std::move(characteristic),
this));
}
resolver->resolve(gattCharacteristics);
} else {
resolver->reject(BluetoothError::take(resolver, result));
}
}
ScriptPromise BluetoothRemoteGATTService::getCharacteristic(
ScriptState* scriptState,
const StringOrUnsignedLong& characteristic,
ExceptionState& exceptionState) {
String characteristicUUID =
BluetoothUUID::getCharacteristic(characteristic, exceptionState);
if (exceptionState.hadException())
return exceptionState.reject(scriptState);
return getCharacteristicsImpl(
scriptState, mojom::blink::WebBluetoothGATTQueryQuantity::SINGLE,
characteristicUUID);
}
ScriptPromise BluetoothRemoteGATTService::getCharacteristics(
ScriptState* scriptState,
const StringOrUnsignedLong& characteristic,
ExceptionState& exceptionState) {
String characteristicUUID =
BluetoothUUID::getCharacteristic(characteristic, exceptionState);
if (exceptionState.hadException())
return exceptionState.reject(scriptState);
return getCharacteristicsImpl(
scriptState, mojom::blink::WebBluetoothGATTQueryQuantity::MULTIPLE,
characteristicUUID);
}
ScriptPromise BluetoothRemoteGATTService::getCharacteristics(
ScriptState* scriptState,
ExceptionState&) {
return getCharacteristicsImpl(
scriptState, mojom::blink::WebBluetoothGATTQueryQuantity::MULTIPLE);
}
ScriptPromise BluetoothRemoteGATTService::getCharacteristicsImpl(
ScriptState* scriptState,
mojom::blink::WebBluetoothGATTQueryQuantity quantity,
const String& characteristicsUUID) {
// We always check that the device is connected.
if (!device()->gatt()->connected()) {
return ScriptPromise::rejectWithDOMException(
scriptState,
DOMException::create(NetworkError, kGATTServerNotConnected));
}
if (!device()->isValidService(m_service->instance_id)) {
return ScriptPromise::rejectWithDOMException(
scriptState, DOMException::create(InvalidStateError, kInvalidService));
}
ScriptPromiseResolver* resolver = ScriptPromiseResolver::create(scriptState);
ScriptPromise promise = resolver->promise();
device()->gatt()->AddToActiveAlgorithms(resolver);
mojom::blink::WebBluetoothService* service = m_device->bluetooth()->service();
WTF::Optional<String> uuid = WTF::nullopt;
if (!characteristicsUUID.isEmpty())
uuid = characteristicsUUID;
service->RemoteServiceGetCharacteristics(
m_service->instance_id, quantity, uuid,
convertToBaseCallback(
WTF::bind(&BluetoothRemoteGATTService::GetCharacteristicsCallback,
wrapPersistent(this), m_service->instance_id, quantity,
wrapPersistent(resolver))));
return promise;
}
} // namespace blink
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