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// 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/control_message_handler", [
"mojo/public/js/codec",
"mojo/public/interfaces/bindings/interface_control_messages.mojom",
"mojo/public/js/validator",
], function(codec, controlMessages, validator) {
var Validator = validator.Validator;
function validateControlRequestWithResponse(message) {
var messageValidator = new Validator(message);
var error = messageValidator.validateMessageIsRequestExpectingResponse();
if (error !== validator.validationError.NONE) {
throw error;
}
if (message.getName() != controlMessages.kRunMessageId) {
throw new Error("Control message name is not kRunMessageId");
}
// Validate payload.
error = controlMessages.RunMessageParams.validate(messageValidator,
message.getHeaderNumBytes());
if (error != validator.validationError.NONE) {
throw error;
}
}
function validateControlRequestWithoutResponse(message) {
var messageValidator = new Validator(message);
var error = messageValidator.validateMessageIsRequestWithoutResponse();
if (error != validator.validationError.NONE) {
throw error;
}
if (message.getName() != controlMessages.kRunOrClosePipeMessageId) {
throw new Error("Control message name is not kRunOrClosePipeMessageId");
}
// Validate payload.
error = controlMessages.RunOrClosePipeMessageParams.validate(
messageValidator, message.getHeaderNumBytes());
if (error != validator.validationError.NONE) {
throw error;
}
}
function runOrClosePipe(message, interface_version) {
var reader = new codec.MessageReader(message);
var runOrClosePipeMessageParams = reader.decodeStruct(
controlMessages.RunOrClosePipeMessageParams);
return interface_version >=
runOrClosePipeMessageParams.input.require_version.version;
}
function run(message, responder, interface_version) {
var reader = new codec.MessageReader(message);
var runMessageParams =
reader.decodeStruct(controlMessages.RunMessageParams);
var runOutput = null;
if (runMessageParams.input.query_version) {
runOutput = new controlMessages.RunOutput();
runOutput.query_version_result = new
controlMessages.QueryVersionResult({'version': interface_version});
}
var runResponseMessageParams = new
controlMessages.RunResponseMessageParams();
runResponseMessageParams.output = runOutput;
var messageName = controlMessages.kRunMessageId;
var payloadSize = controlMessages.RunResponseMessageParams.encodedSize;
var requestID = reader.requestID;
var builder = new codec.MessageWithRequestIDBuilder(messageName,
payloadSize, codec.kMessageIsResponse, requestID);
builder.encodeStruct(controlMessages.RunResponseMessageParams,
runResponseMessageParams);
responder.accept(builder.finish());
return true;
}
function isControlMessage(message) {
return message.getName() == controlMessages.kRunMessageId ||
message.getName() == controlMessages.kRunOrClosePipeMessageId;
}
function ControlMessageHandler(interface_version) {
this.interface_version = interface_version;
}
ControlMessageHandler.prototype.accept = function(message) {
validateControlRequestWithoutResponse(message);
return runOrClosePipe(message, this.interface_version);
};
ControlMessageHandler.prototype.acceptWithResponder = function(message,
responder) {
validateControlRequestWithResponse(message);
return run(message, responder, this.interface_version);
};
var exports = {};
exports.ControlMessageHandler = ControlMessageHandler;
exports.isControlMessage = isControlMessage;
return exports;
});
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