Adds EngineGeolocationFeature for Blimp Geolocation project.

blimp/engine/feature/geolocation/engine_geolocation_feature.cc

Index: blimp/engine/feature/geolocation/engine_geolocation_feature.cc
diff --git a/blimp/engine/feature/geolocation/engine_geolocation_feature.cc b/blimp/engine/feature/geolocation/engine_geolocation_feature.cc
new file mode 100644
index 0000000000000000000000000000000000000000..8af873bef4be9ffb13939970717ada974593d5eb
--- /dev/null
+++ b/blimp/engine/feature/geolocation/engine_geolocation_feature.cc
@@ -0,0 +1,151 @@
+// Copyright 2016 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 "blimp/engine/feature/geolocation/engine_geolocation_feature.h"
+
+#include "base/memory/weak_ptr.h"
+#include "blimp/common/create_blimp_message.h"
+#include "blimp/common/proto/blimp_message.pb.h"
+#include "blimp/common/proto/geolocation.pb.h"
+#include "content/public/browser/location_provider.h"
+#include "content/public/common/geoposition.h"
+#include "net/base/net_errors.h"
+
+namespace blimp {
+namespace engine {
+namespace {
+
+content::Geoposition::ErrorCode ConvertErrorCode(
+    const GeolocationErrorMessage::ErrorCode& error_code) {
+  switch (error_code) {
+    case GeolocationErrorMessage::PERMISSION_DENIED:
+      return content::Geoposition::ErrorCode::ERROR_CODE_PERMISSION_DENIED;
+    case GeolocationErrorMessage::POSITION_UNAVAILABLE:
+      return content::Geoposition::ErrorCode::ERROR_CODE_POSITION_UNAVAILABLE;
+    case GeolocationErrorMessage::TIMEOUT:
+      return content::Geoposition::ErrorCode::ERROR_CODE_TIMEOUT;
+  }
+}
+
+content::Geoposition ConvertLocationMessage(
+    const GeolocationPositionMessage& location) {
+  content::Geoposition output;
+  output.latitude = location.coordinates().latitude();
+  output.longitude = location.coordinates().longitude();
+  output.altitude = location.coordinates().altitude();
+  output.accuracy = location.coordinates().accuracy();
+  output.altitude_accuracy = location.coordinates().altitude_accuracy();
+  output.heading = location.coordinates().heading();
+  output.speed = location.coordinates().speed();
+  output.timestamp = base::Time::FromJsTime(location.timestamp_millis());
+  output.error_code = content::Geoposition::ErrorCode::ERROR_CODE_NONE;
+  return output;
+}
+
+}  // namespace
+
+EngineGeolocationFeature::EngineGeolocationFeature() : weak_factory_(this) {}
+
+EngineGeolocationFeature::~EngineGeolocationFeature() {}
+
+void EngineGeolocationFeature::set_outgoing_message_processor(
+    std::unique_ptr<BlimpMessageProcessor> message_processor) {
+  DCHECK(message_processor);
+  outgoing_message_processor_ = std::move(message_processor);
+}
+
+base::WeakPtr<EngineGeolocationFeature> EngineGeolocationFeature::GetWeakPtr() {
+  return weak_factory_.GetWeakPtr();
+}
+
+void EngineGeolocationFeature::StartProvider(bool enable_high_accuracy) {
+  GeolocationMessage* geolocation_message = nullptr;
+  std::unique_ptr<BlimpMessage> blimp_message =
+      CreateBlimpMessage(&geolocation_message);
+
+  GeolocationInterestMessage* geolocation_interest =
+      geolocation_message->mutable_update_listen_state();
+  if (enable_high_accuracy) {
+    geolocation_interest->set_listen_state(
+        GeolocationInterestMessage::ACCURACY_HIGH);
+  } else {
+    geolocation_interest->set_listen_state(
+        GeolocationInterestMessage::ACCURACY_LOW);
+  }
+
+  outgoing_message_processor_->ProcessMessage(std::move(blimp_message),
+                                              net::CompletionCallback());
+}
+
+void EngineGeolocationFeature::StopProvider() {
+  GeolocationMessage* geolocation_message = nullptr;
+  std::unique_ptr<BlimpMessage> blimp_message =
+      CreateBlimpMessage(&geolocation_message);
+
+  GeolocationInterestMessage* geolocation_interest =
+      geolocation_message->mutable_update_listen_state();
+  geolocation_interest->set_listen_state(
+      GeolocationInterestMessage::REQUEST_NONE);
+
+  outgoing_message_processor_->ProcessMessage(std::move(blimp_message),
+                                              net::CompletionCallback());
+}
+
+void EngineGeolocationFeature::RequestRefresh() {
+  GeolocationMessage* geolocation_message = nullptr;
+  std::unique_ptr<BlimpMessage> blimp_message =
+      CreateBlimpMessage(&geolocation_message);
+
+  geolocation_message->mutable_request_refresh();
+
+  outgoing_message_processor_->ProcessMessage(std::move(blimp_message),
+                                              net::CompletionCallback());
+}
+
+void EngineGeolocationFeature::SetUpdateCallback(
+    const base::Callback<void(const content::Geoposition&)>& callback) {
+  geolocation_received_callback_ = callback;
+}
+
+void EngineGeolocationFeature::ProcessMessage(
+    std::unique_ptr<BlimpMessage> message,
+    const net::CompletionCallback& callback) {
+  DCHECK(!callback.is_null());
+  DCHECK_EQ(BlimpMessage::kGeolocation, message->feature_case());
+
+  const GeolocationMessage& geolocation_message = message->geolocation();
+
+  switch (geolocation_message.type_case()) {
+    case GeolocationMessage::kLocation: {
+      const GeolocationPositionMessage location =

[Wez, 2016/07/14 01:19:22]

nit: const& here

[CJ, 2016/07/14 23:55:09]

Done.

+          geolocation_message.location();
+      content::Geoposition output = ConvertLocationMessage(location);
+      NotifyCallback(output);
+      break;
+    }
+    case GeolocationMessage::kError: {
+      content::Geoposition output;

[Wez, 2016/07/14 01:19:22]

nit: As per style-guide, only declare |output| immediately before you first need
to use it.

[CJ, 2016/07/14 23:55:09]

Done.

+      const GeolocationErrorMessage error_message = geolocation_message.error();

[Wez, 2016/07/14 01:19:22]

nit: const &

[CJ, 2016/07/14 23:55:09]

Done.

+      output.error_message = error_message.error_message();
+      output.error_code = ConvertErrorCode(error_message.error_code());
+      NotifyCallback(output);
+      break;
+    }
+    case GeolocationMessage::kUpdateListenState:
+    case GeolocationMessage::kRequestRefresh:
+    case GeolocationMessage::TYPE_NOT_SET:
+      DLOG(FATAL) << "Client sent unexpected message type."
+                  << geolocation_message.type_case();
+      break;
+  }
+  callback.Run(net::OK);
+}
+
+void EngineGeolocationFeature::NotifyCallback(
+    const content::Geoposition& position) {
+  geolocation_received_callback_.Run(position);
+}
+
+}  // namespace engine
+}  // namespace blimp