Introduce InterfaceEndpointClient(IEC), InterfaceEndpointHandle and

mojo/public/js/lib/pipe_control_message_handler.js

+// 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.
+
+define("mojo/public/js/lib/pipe_control_message_handler", [
+  "mojo/public/interfaces/bindings/pipe_control_messages.mojom",
+  "mojo/public/js/codec",
+  "mojo/public/js/interface_types",
+  "mojo/public/js/validator",
+], function(pipeControlMessages, codec, types, validator) {
+
+  var Validator = validator.Validator;
+
+  function validateControlRequestWithoutResponse(message) {
+    var messageValidator = new Validator(message);
+    var error = messageValidator.validateMessageIsRequestWithoutResponse();
+    if (error != validator.validationError.NONE) {
+      throw error;
+    }
+
+    if (message.getName() != pipeControlMessages.kRunOrClosePipeMessageId) {
+      throw new Error("Control message name is not kRunOrClosePipeMessageId");
+    }
+
+    // Validate payload.
+    error = pipeControlMessages.RunOrClosePipeMessageParams.validate(
+        messageValidator, message.getHeaderNumBytes());
+    if (error != validator.validationError.NONE) {
+      throw error;
+    }
+  }
+
+  function runOrClosePipe(message, delegate) {
+    var reader = new codec.MessageReader(message);
+    var runOrClosePipeMessageParams = reader.decodeStruct(
+        pipeControlMessages.RunOrClosePipeMessageParams);
+    var event = runOrClosePipeMessageParams.input
+        .peer_associated_endpoint_closed_event;
+    return delegate.onPeerAssociatedEndpointClosed(event.id,
+        event.disconnect_reason);
+  }
+
+  function isPipeControlMessage(message) {
+    return !types.isValidInterfaceId(message.getInterfaceId());
+  }
+
+  function PipeControlMessageHandler(delegate) {
+    this.delegate_ = delegate;
+  }
+
+  PipeControlMessageHandler.prototype.accept = function(message) {
+    validateControlRequestWithoutResponse(message);
+    return runOrClosePipe(message, this.delegate_);
+  };
+
+  var exports = {};
+  exports.PipeControlMessageHandler = PipeControlMessageHandler;
+  exports.isPipeControlMessage = isPipeControlMessage;
+
+  return exports;
+});