# Code coverage report for lib/services/server/inMemoryDeviceRegistry.js

## Statements: 95.92% (47 / 49) Branches: 78.57% (11 / 14) Functions: 100% (8 / 8) Lines: 95.92% (47 / 49)

All files » lib/services/server/ » inMemoryDeviceRegistry.js

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    1/*
     * Copyright 2014 Telefonica Investigación y Desarrollo, S.A.U
     *
     * This file is part of iotagent-lwm2m-lib
     *
     * iotagent-lwm2m-lib is free software: you can redistribute it and/or
     * modify it under the terms of the GNU Affero General Public License as
     * published by the Free Software Foundation, either version 3 of the License,
     * or (at your option) any later version.
     *
     * iotagent-lwm2m-lib 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 Affero General Public License for more details.
     *
     * You should have received a copy of the GNU Affero General Public
     * License along with iotagent-lwm2m-lib.
     * If not, seehttp://www.gnu.org/licenses/.
     *
     * For those usages not covered by the GNU Affero General Public License
     * please contact with::[contacto@tid.es]
     */

    'use strict';

    var registry = {},
        idCounter = 1,
        errors = require('../../errors'),
        _ = require('underscore');

    /**
     * Inserts the given object in the registry. The generated ID is returned through the callback.
     *
     * @param {Object} object       Object to insert into the registry.
     */
    function register(object, callback) {
        var id = idCounter++;
        registry[id] = object;
        registry[id].id = id;
        callback(null, id);
    }

    /**
     * Removes the object identified by this id from the registry. The removed object is passed as the first callback
     * parameter.
     *
     * @param {Integer} id          Identifier of the object to be removed.
     */
    function unregister(id, callback) {
        var obj = registry[id];

        if (obj) {
            delete registry[id];

            callback(null, obj);
        } else {
            callback(new errors.DeviceNotFound(id));
        }
    }

    /**
     * Remove all the objects from the registry.
     */
    function clean(callback) {
        registry = {};

        callback();
    }

    /**
     * Retrieves from the registry the object identified by the given id.
     *
     * @param {String} id       Id of the object to be retrieved.
     */
    function getObject(id, callback) {
        Eif (registry[id]) {
            callback(null, _.clone(registry[id]));
        } else {
            callback(new errors.DeviceNotFound(id));
        }
    }

    /**
     * Update the object identified with the given id with the object value passed as a parameter.
     *
     * @param {String} id       Id of the object to update.
     * @param {Object} obj      New object value to insert in the registry.
     */
    function update(id, obj, callback) {
        Eif (registry[id]) {
            registry[id] = obj;
            callback(null, registry[id]);
        } else {
            callback(new errors.DeviceNotFound(id));
        }
    }

    /**
     * Returns an array of all the devices as the parameter of the callback.
     */
    function list(callback) {
        var result = [];

        for(var key in registry) {
            Eif (registry.hasOwnProperty(key)) {
                result.push(registry[key]);
            }
        }

        callback(null, result);
    }

    /**
     * Gets the device that has the device name passed as a parameter (should be unique) or return a DeviceNotFound error
     * in case none exist.
     *
     * @param {String} deviceName       Name of the device to retrieve.
     */
    function getByName(deviceName, callback) {
        var result;

        for(var key in registry) {
            if (registry[key] && registry[key].name === deviceName) {
                result = registry[key];
            }
        }

        if (result) {
            callback(null, result);
        } else {
            callback(new errors.DeviceNotFound(deviceName));
        }
    }

    /**
     * Initializes the device registry based on the parameter found in the configuration. For this in memory registry this
     * function doesn't do anything.
     *
     * @param {Object} config           Configuration object.
     */
    function init(config, callback) {
        callback(null);
    }

    exports.register = register;
    exports.unregister = unregister;
    exports.get = getObject;
    exports.update = update;
    exports.clean = clean;
    exports.list = list;
    exports.getByName = getByName;
    exports.init = init;