switch-channel.js 2.69 KB
/*
 *
 * ADOBE CONFIDENTIAL
 * __________________
 *
 *  Copyright 2016 Adobe Systems Incorporated
 *  All Rights Reserved.
 *
 * NOTICE:  All information contained herein is, and remains
 * the property of Adobe Systems Incorporated and its suppliers,
 * if any.  The intellectual and technical concepts contained
 * herein are proprietary to Adobe Systems Incorporated and its
 * suppliers and are protected by trade secret or copyright law.
 * Dissemination of this information or reproduction of this material
 * is strictly forbidden unless prior written permission is obtained
 * from Adobe Systems Incorporated.
 */

/* globals */
define('screens/player/command/switch-channel', [
    'underscore',
    'screens/player/command/command',
    'screens/player/shared/serviceadmin',
    'screens/player/firmware/core/firmware/firmware',
    'module'
], function(_, PlayerCommand, ServiceAdmin, Firmware, mod) {
    'use strict';

    /**
     *
     * This command handler is able to process the following commands:
     * - "switch-channel" switches the channel on the device. It requires a 'role' argument in the payload
     *
     * @class SwitchChannelCommand
     * @implements {PlayerCommand}
     */
    return _.extend({}, PlayerCommand, {

        serviceId: mod.id,

        /**
         * @function SwitchChannelCommand#canHandle
         * @inheritdoc
         */
        canHandle: function(cmd) {
            return cmd === 'switch-channel';
        },

        /**
         * @function SwitchChannelCommand#activate
         * @inheritdoc
         */
        activate: function() {
            return new Promise(function(resolve, reject) {
                ServiceAdmin.onServiceHighestRankedStart(Firmware.serviceName, function(firmware) {
                    resolve(firmware);
                });
            });
        },

        /**
         * @function SwitchChannelCommand#handleCommand
         * @inheritdoc
         */
        handleCommand: function(command, payload) {
            if (!payload || !payload.role) {
                throw new Error('Unable to switch channel. Role is missing in payload');
            }
            var role = payload && payload.role;
            var firmware = ServiceAdmin.getService(Firmware.serviceName);
            var player = firmware.getPlayer();
            player.emit(player.EVENTS.SWITCH_CHANNEL, role, true);
            // TODO: use proper logger
            console.log('switch-channel command: sent event to player with role: ', role);
        }

    });
});

/* istanbul ignore next */
require([
    'screens/player/command/switch-channel',
    'screens/player/shared/serviceadmin'
], function(Service, ServiceAdmin) {
    'use strict';
    ServiceAdmin.register(Service);
});