src/providers/packages.js

/**
 * OS.js - JavaScript Cloud/Web Desktop Platform
 *
 * Copyright (c) Anders Evenrud <andersevenrud@gmail.com>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this
 *    list of conditions and the following disclaimer
 * 2. 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
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * @author  Anders Evenrud <andersevenrud@gmail.com>
 * @licence Simplified BSD License
 */

const fs = require('fs-extra');
const path = require('path');
const chokidar = require('chokidar');
const {ServiceProvider} = require('@osjs/common');
const Packages = require('../packages');
const {closeWatches} = require('../utils/core');

/**
 * OS.js Package Service Provider
 */
class PackageServiceProvider extends ServiceProvider {
  constructor(core) {
    super(core);

    const {configuration} = this.core;
    const manifestFile = path.join(configuration.public, configuration.packages.metadata);
    const discoveredFile = path.resolve(configuration.root, configuration.packages.discovery);

    this.watches = [];
    this.packages = new Packages(core, {
      manifestFile,
      discoveredFile
    });
  }

  provides() {
    return [
      'osjs/packages'
    ];
  }

  init() {
    this.core.singleton('osjs/packages', () => this.packages);

    return this.packages.init();
  }

  start() {
    this.packages.start();

    if (this.core.configuration.development) {
      this.initDeveloperTools();
    }
  }

  async destroy() {
    await closeWatches(this.watches);
    await this.packages.destroy();
    super.destroy();
  }

  /**
   * Initializes some developer features
   */
  initDeveloperTools() {
    const {manifestFile} = this.packages.options;

    if (fs.existsSync(manifestFile)) {
      const watcher = chokidar.watch(manifestFile);
      watcher.on('change', () => {
        this.core.broadcast('osjs/packages:metadata:changed');
      });
      this.watches.push(watcher);
    }
  }
}

module.exports = PackageServiceProvider;