domotz-remote-pawn/src/upnp/upnpRegistry.js

Domotz Agent

/** This file is part of Domotz Agent.
 * Copyright (C) 2016  Domotz Ltd
 *
 * Domotz Agent is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Domotz Agent is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Domotz Agent.  If not, see <http://www.gnu.org/licenses/>.
 **/
/**
 * Created by Massimiliano Cuzzoli <mcuzzoli@domotz.com> on 20/04/15.
 *
 */

var registry = function (deepEqual) {
    var subscriptions = {};

    function createKey(host, port, path) {
        return JSON.stringify(host, port, path);
    }

    var ret = {
        insertSubscription: function (subscription) {
            subscriptions[createKey(subscription.device_info)] = subscription;
        },
        getSubscriptionById: function (id) {
            for (var key in subscriptions) {
                if (subscriptions.hasOwnProperty(key) && subscriptions[key].id === id) {
                    return subscriptions[key];
                }
            }
        },
        getSubscriptionByDevice: function (host, port, path) {
            if (port === undefined) {
                port = host[1];
                path = host[2];
                host = host[0];
            }
            return subscriptions[createKey([host, port, path])];
        },
        updateSubscription: function (id, newSubscription) {
            var oldSubscription = ret.getSubscriptionById(id);
            if (!oldSubscription) {
                throw new Error('subscription id not found: ' + id);
            }

            if (!deepEqual(oldSubscription.device_info, newSubscription.device_info)) {
                throw new Error('Cannot update when changing device info: ' + id);
            }
            subscriptions[createKey(newSubscription.device_info)] = newSubscription;
        },
        removeSubscription: function (subscription) {
            delete subscriptions[createKey(subscription.device_info)];
        },
    };

    return ret;
};

module.exports.registry = registry;