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JOYnr JavaScript libjoynr-js
There is a newer version: 1.4.0
/*eslint global-require: "off"*/
/*
 * #%L
 * %%
 * Copyright (C) 2011 - 2017 BMW Car IT GmbH
 * %%
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * #L%
 */
const JSONSerializer = require("../util/JSONSerializer");
const JoynrMessage = require("./JoynrMessage");
const LoggingManager = require("../system/LoggingManager");
const log = LoggingManager.getLogger("joynr.messaging.MessageSerializer");

const MessageSerializer = {};

function useSmrf() {
    const smrf = require("../../global/SmrfNode");

    function serializeSmrfMessage(smrfMsg) {
        try {
            return smrf.serialize(smrfMsg);
        } catch (e) {
            throw new Error("ws.marshalJoynrMessage: got exception " + e);
        }
    }

    function deserializeSmrfMessage(data) {
        try {
            return smrf.deserialize(data);
        } catch (e) {
            throw new Error("ws.marshalJoynrMessage: got exception " + e);
        }
    }

    MessageSerializer.stringify = function(joynrMessage) {
        joynrMessage.body = joynrMessage.body || new Buffer(joynrMessage.payload);

        return serializeSmrfMessage(joynrMessage);
    };

    MessageSerializer.parse = function(data) {
        if (typeof data !== "object") {
            log.error("MessageSerializer received unsupported message.");
        } else {
            const smrfMsg = deserializeSmrfMessage(data);
            const expiryDate = smrfMsg.isTtlAbsolute === true ? smrfMsg.ttlMs : smrfMsg.ttlMs + Date.now();

            // smrfMsg has two attributes we need to throw away -> create new Object
            const messageWithoutRest = {
                headers: smrfMsg.headers,
                sender: smrfMsg.sender,
                recipient: smrfMsg.recipient,
                ttlMs: expiryDate,
                payload: smrfMsg.body.toString()
            };
            return JoynrMessage.parseMessage(messageWithoutRest);
        }
    };
}

if (global.window !== undefined) {
    MessageSerializer.stringify = JSONSerializer.stringify;
    MessageSerializer.parse = function(payload) {
        return new JoynrMessage(JSON.parse(payload.toString()));
    };
} else {
    useSmrf();
}

module.exports = MessageSerializer;