iot-sol
Version:
Intel(r) IoT Services Orchestration Layer - HTML5 IDE + Node.js middleware to create and host distributed IoT Apps in minutes
210 lines (195 loc) • 6.48 kB
JavaScript
/******************************************************************************
Copyright (c) 2016, Intel Corporation
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
* 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.
* Neither the name of Intel Corporation nor the names of its contributors
may be used to endorse or promote products derived from this software
without specific prior written permission.
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.
*****************************************************************************/
/**
* Copyright 2014, 2016 IBM Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
**/
var clone = require("clone");
function generateId() {
return (1+Math.random()*4294967295).toString(16);
}
function ensureString(o) {
if (Buffer.isBuffer(o)) {
return o.toString();
} else if (typeof o === "object") {
return JSON.stringify(o);
} else if (typeof o === "string") {
return o;
}
return ""+o;
}
function ensureBuffer(o) {
if (Buffer.isBuffer(o)) {
return o;
} else if (typeof o === "object") {
o = JSON.stringify(o);
} else if (typeof o !== "string") {
o = ""+o;
}
return new Buffer(o);
}
function cloneMessage(msg) {
// Temporary fix for #97
// TODO: remove this http-node-specific fix somehow
var req = msg.req;
var res = msg.res;
delete msg.req;
delete msg.res;
var m = clone(msg);
if (req) {
m.req = req;
msg.req = req;
}
if (res) {
m.res = res;
msg.res = res;
}
return m;
}
function compareObjects(obj1,obj2) {
if (obj1 === obj2) {
return true;
}
if (obj1 == null || obj2 == null) {
return false;
}
if (!(obj1 instanceof Object) && !(obj2 instanceof Object)) {
return false;
}
var isArray1 = Array.isArray(obj1);
var isArray2 = Array.isArray(obj2);
if (isArray1 != isArray2) {
return false;
}
if (isArray1 && isArray2) {
if (obj1.length != obj2.length) {
return false;
}
for (var i=0;i<obj1.length;i++) {
if (!compareObjects(obj1[i],obj2[i])) {
return false;
}
}
return true;
}
var keys1 = Object.keys(obj1);
var keys2 = Object.keys(obj2);
if (keys1.length != keys2.length) {
return false;
}
for (var k in obj1) {
/* istanbul ignore else */
if (obj1.hasOwnProperty(k)) {
if (!compareObjects(obj1[k],obj2[k])) {
return false;
}
}
}
return true;
}
function getMessageProperty(msg,expr) {
var result = null;
if (expr.indexOf('msg.')===0) {
expr = expr.substring(4);
}
var msgPropParts = expr.split(".");
msgPropParts.reduce(function(obj, i) {
result = (typeof obj[i] !== "undefined" ? obj[i] : undefined);
return result;
}, msg);
return result;
}
function setMessageProperty(msg,prop,value,createMissing) {
if (typeof createMissing === 'undefined') {
createMissing = (typeof value !== 'undefined');
}
if (prop.indexOf('msg.')===0) {
prop = prop.substring(4);
}
var msgPropParts = prop.split(".");
var depth = 0;
msgPropParts.reduce(function(obj, i) {
if (obj === null) {
return null;
}
depth++;
if (depth === msgPropParts.length) {
if (typeof value === "undefined") {
delete obj[i];
} else {
obj[i] = value;
}
} else {
if (!obj[i]) {
if (createMissing) {
obj[i] = {};
} else {
return null;
}
}
return obj[i];
}
}, msg);
}
function evaluateNodeProperty(value, type, node, msg) {
if (type === 'str') {
return ""+value;
} else if (type === 'num') {
return Number(value);
} else if (type === 'json') {
return JSON.parse(value);
} else if (type === 're') {
return new RegExp(value);
} else if (type === 'msg' && msg) {
return getMessageProperty(msg,value);
} else if (type === 'flow' && node) {
return node.context().flow.get(value);
} else if (type === 'global' && node) {
return node.context().global.get(value);
} else if (type === 'bool') {
return /^true$/i.test(value);
}
return value;
}
module.exports = {
ensureString: ensureString,
ensureBuffer: ensureBuffer,
cloneMessage: cloneMessage,
compareObjects: compareObjects,
generateId: generateId,
getMessageProperty: getMessageProperty,
setMessageProperty: setMessageProperty,
evaluateNodeProperty: evaluateNodeProperty
};