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| /*
* 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 async = require('async'),
apply = async.apply,
coapUtils = require('./coapUtils'),
errors = require('../../errors'),
registry,
logger = require('logops'),
context = {
op: 'LWM2MLib.DeviceManagement'
};
/**
* Execute a read operation for the selected resource, identified following the LWTM2M conventions by its: deviceId,
* objectType, objectId and resourceId.
*/
function read(deviceId, objectType, objectId, resourceId, callback) {
function createReadRequest(obj, callback) {
var request = {
host: obj.address,
port: 5683,
method: 'GET',
pathname: '/' + objectType + '/' + objectId + '/' + resourceId
};
callback(null, request);
}
logger.debug(context, 'Reading value from resource /%s/%s/%s in device [%d]',
objectType, objectId, resourceId, deviceId);
async.waterfall([
apply(registry.get, deviceId),
createReadRequest,
coapUtils.sendRequest,
coapUtils.generateProcessResponse(objectType, objectId, resourceId, '2.05')
], callback);
}
/**
* Execute a Write operation over the selected resource, identified following the LWTM2M conventions by its: deviceId,
* objectType, objectId and resourceId, changing its value to the value passed as a parameter.
*/
function write(deviceId, objectType, objectId, resourceId, value, callback) {
function createUpdateRequest(obj, callback) {
var request = {
host: obj.address,
port: 5683,
method: 'PUT',
pathname: '/' + objectType + '/' + objectId + '/' + resourceId,
payload: value
};
callback(null, request);
}
function processResponse(res, callback) {
if (res.code === '2.04') {
callback(null, res.payload.toString('utf8'));
} else Eif (res.code === '4.04') {
callback(new errors.ObjectNotFound('/' + objectType + '/' + objectId));
} else {
callback(new errors.ClientError(res.code));
}
}
logger.debug(context, 'Writting a new value [%s] on resource /%s/%s/%s in device [%d]',
value, objectType, objectId, resourceId, deviceId);
async.waterfall([
apply(registry.get, deviceId),
createUpdateRequest,
coapUtils.sendRequest,
processResponse
], callback);
}
function execute(callback) {
callback(null);
}
/**
* Write the attributes given as a parameter in the remote resource identified by the Object type and id in the
* selected device.
*
* @param {String} deviceId ID of the device that holds the resource.
* @param {String} objectType ID of the object type of the instance.
* @param {String} objectId ID of the instance whose resource will be modified.
* @param {String} resourceId ID of the resource to modify.
* @param {Object} parameters Object with the parameters to write: each parameter is stored as an attribute.
*/
function writeAttributes(deviceId, objectType, objectId, resourceId, attributes, callback) {
function createQueryParams(innerCb) {
var validAttributes = ['pmin', 'pmax', 'gt', 'lt', 'st', 'cancel'],
result = '?',
errorList = [];
for (var i in attributes) {
Eif (attributes.hasOwnProperty(i)) {
Eif (validAttributes.indexOf(i) >= 0) {
result += i + '=' + attributes[i] + '&';
} else {
errorList.push(i);
}
}
}
Iif (errorList.length !== 0) {
innerCb(new errors.UnsupportedAttributes(errorList));
} else {
innerCb(null, result);
}
}
function createWriteAttributesRequest(data, innerCb) {
var request = {
host: data[0].address,
port: 5683,
method: 'PUT'
};
if (objectType && objectId && resourceId) {
request.pathname = '/' + objectType + '/' + objectId + '/' + resourceId + data[1];
} else if (objectType && objectId) {
request.pathname = '/' + objectType + '/' + objectId + data[1];
} else {
request.pathname = '/' + objectType + data[1];
}
innerCb(null, request);
}
logger.debug(context, 'Writting new discover attributes on resource /%s/%s/%s in device [%d]',
objectType, objectId, resourceId, deviceId);
logger.debug(context, 'The new attributes are:\n%j', attributes);
async.waterfall([
apply(async.parallel, [
apply(registry.get, deviceId),
createQueryParams
]),
createWriteAttributesRequest,
coapUtils.sendRequest,
coapUtils.generateProcessResponse(objectType, objectId, resourceId, '2.04')
], callback);
}
/**
* Execute a discover operation for the selected resource, identified following the LWTM2M conventions by its:
* deviceId, objectType, objectId and resourceId.
*/
function discover(deviceId, objectType, objectId, resourceId, fullCallback) {
var pathname,
trueCallback;
if (objectId && resourceId && fullCallback) {
pathname= '/' + objectType + '/' + objectId + '/' + resourceId;
trueCallback = fullCallback;
} else if (objectId && resourceId) {
pathname= '/' + objectType + '/' + objectId;
trueCallback = resourceId;
} else {
pathname= '/' + objectType;
trueCallback = objectId;
}
function createReadRequest(obj, callback) {
var request = {
host: obj.address,
port: 5683,
method: 'GET',
pathname: pathname,
options: {
'Accept': 'application/link-format'
}
};
callback(null, request);
}
logger.debug(context, 'Executing a discover operation on resource /%s/%s/%s in device [%d]',
objectType, objectId, resourceId, deviceId);
Iif (!objectType && !objectId && !resourceId) {
logger.error(context, 'Method called with wrong number of parameters. Couldn\'t identify callback');
} else {
async.waterfall([
apply(registry.get, deviceId),
createReadRequest,
coapUtils.sendRequest,
coapUtils.generateProcessResponse(objectType, objectId, resourceId, '2.05')
], trueCallback);
}
}
function create(deviceId, objectType, objectId, callback) {
function createUpdateRequest(obj, callback) {
var request = {
host: obj.address,
port: 5683,
method: 'POST',
pathname: '/' + objectType + '/' + objectId
};
callback(null, request);
}
logger.debug(context, 'Creating a new instance of object type [%s] in the device [%d] with instance id [%s]',
objectType, deviceId, objectId);
async.waterfall([
apply(registry.get, deviceId),
createUpdateRequest,
coapUtils.sendRequest,
coapUtils.generateProcessResponse(objectType, objectId, null, '2.01')
], callback);
}
function remove(deviceId, objectType, objectId, callback) {
callback(null);
}
function init(deviceRegistry) {
registry = deviceRegistry;
}
exports.read = read;
exports.write = write;
exports.execute = execute;
exports.writeAttributes = writeAttributes;
exports.discover = discover;
exports.create = create;
exports.remove = remove;
exports.init = init;
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