[Presentation API] (5th) (1-UA) integrate controller and receiver side for 1-UA messaging

chrome/browser/media/router/browser_presentation_connection_proxy.cc

+// Copyright 2017 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 "chrome/browser/media/router/browser_presentation_connection_proxy.h"
+
+#include "chrome/browser/media/router/media_router.h"
+#include "content/public/common/presentation_constants.h"
+
+namespace {
+
+// TODO(crbug.com/632623): remove this function when we finish typemaps for
+// presentation.mojom.
+std::unique_ptr<content::PresentationConnectionMessage>
+PresentationConnectionMessageFromMojo(
+    blink::mojom::ConnectionMessagePtr input) {
+  std::unique_ptr<content::PresentationConnectionMessage> output;
+  if (input.is_null())
+    return output;
+
+  switch (input->type) {
+    case blink::mojom::PresentationMessageType::TEXT: {
+      // Return nullptr content::PresentationSessionMessage if invalid (unset
+      // |message|, set |data|, or size too large).
+      if (input->data || !input->message ||
+          input->message->size() >
+              content::kMaxPresentationConnectionMessageSize)
+        return output;
+
+      output.reset(new content::PresentationConnectionMessage(
+          content::PresentationMessageType::TEXT));
+      output->message = std::move(input->message.value());
+      return output;
+    }
+    case blink::mojom::PresentationMessageType::BINARY: {
+      // Return nullptr content::PresentationSessionMessage if invalid (unset
+      // |data|, set |message|, or size too large).
+      if (!input->data || input->message ||
+          input->data->size() > content::kMaxPresentationConnectionMessageSize)
+        return output;
+
+      output.reset(new content::PresentationConnectionMessage(
+          content::PresentationMessageType::BINARY));
+      output->data.reset(
+          new std::vector<uint8_t>(std::move(input->data.value())));
+      return output;
+    }
+  }
+
+  NOTREACHED() << "Invalid presentation message type " << input->type;
+  return output;
+}
+
+}  // namespace
+
+namespace media_router {
+
+BrowserPresentationConnectionProxy::BrowserPresentationConnectionProxy(
+    MediaRouter* router,
+    const MediaRoute::Id& route_id,
+    blink::mojom::PresentationConnectionRequest receiver_connection_request,
+    blink::mojom::PresentationConnectionPtr controller_connection_ptr)
+    : router_(router),
+      route_id_(route_id),
+      binding_(this),
+      target_connection_ptr_(std::move(controller_connection_ptr)) {
+  DCHECK(router);
+  DCHECK(target_connection_ptr_);
+
+  binding_.Bind(std::move(receiver_connection_request));
+  target_connection_ptr_->DidChangeState(
+      content::PRESENTATION_CONNECTION_STATE_CONNECTED);
+}
+
+BrowserPresentationConnectionProxy::~BrowserPresentationConnectionProxy() {}
+
+void BrowserPresentationConnectionProxy::OnMessage(
+    blink::mojom::ConnectionMessagePtr connection_message,
+    const OnMessageCallback& on_message_callback) {
+  DVLOG(2) << "BrowserPresentationConnectionProxy::OnMessage";
+  DCHECK(!connection_message.is_null());
+
+  auto message =
+      PresentationConnectionMessageFromMojo(std::move(connection_message));
+
+  if (message->is_binary()) {
+    router_->SendRouteBinaryMessage(route_id_, std::move(message->data),
+                                    on_message_callback);
+  } else {
+    router_->SendRouteMessage(route_id_, message->message, on_message_callback);
+  }
+}
+
+}  // namespace media_router