IBM/node-celery-ts

// BSD 3-Clause License
//
// Copyright (c) 2018, IBM Corporation
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice, this
//   list of conditions and the following disclaimer.
//
// * Redistributions in binary form must reproduce the above copyright notice,
//   this list of conditions and the following disclaimer in the documentation
//   and/or other materials provided with the distribution.
//
// * Neither the name of the copyright holder nor the names of its
//   contributors may be used to endorse or promote products derived from
//   this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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import * as JsYaml from "js-yaml";

/**
 * encapsulates serialization of arbitrary data into binary formats
 */
export interface Serializer {
    serialize(data: any): Buffer;

    deserialize(data: Buffer): any;
}

/**
 * implemented using JSON.{stringify,parse}
 *
 * @returns a Serializer that serializes data to and from JSON
 */
export const createJsonSerializer = (): Serializer => ({
    serialize: (data: any): Buffer => Buffer.from(JSON.stringify(data), "utf8"),

    deserialize: (data: Buffer): any => JSON.parse(data.toString("utf8")),
});

/**
 * implemented using js-yaml's safeDump and safeLoad
 * cannot serialize undefined inputs
 *
 * @returns a Serializer that serializes data to and from YAML
 */
export const createYamlSerializer = (): Serializer => ({
    serialize: (data: any): Buffer =>
        Buffer.from(JsYaml.safeDump(data), "utf8"),

    deserialize: (data: Buffer): any => JsYaml.safeLoad(data.toString("utf8")),
});