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Add data-generator node

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Dave Conway-Jones
2016-03-16 16:37:23 +00:00
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node-red-node-web-data-generator
================================
A <a href="http://nodered.org" target="_new">Node-RED</a> node to create dummy
data values from a template. Useful for building test-cases.
Install
-------
Run the following command in your Node-RED user directory - typically `~/.node-red`
npm install node-red-node-data-generator
Usage
-----
Creates dummy data based on a handlebars-style template.
Uses the <i><a href="https://github.com/webroo/dummy-json" target="_new">dummy-json</a></i>
module, which can create rich sets of dummy data for testing or other uses.
It will build a **string**, or a **parsed JSON object**, creating values based
on the helper names below:
title, firstname, lastname, company, domain, tld, email,
street, city, country, countryCode, zipcode, postcode,
lat, long, phone, color, hexColor, guid,
ipv4, ipv6, lorem, date, time,
lowercase, uppercase, int, float, boolean
Multiple values can be generated by use of the `repeat` syntax.
In addition any properties passed in on the `msg` object can also be used - for example {{payload}}.
Finally `msg.seed` can be used to preset the pseudo-random seed to ensure repeatability across calls.
Example
-------
The example flow below produces a JSON string which is then converted into an object, for example:
{
"name": "Theo Cumbie",
"work": "CoreXTS",
"email": "theo.cumbie@corexts.gov",
"address": "83 Sherman Road",
"country": "Angola",
"text": "Sagittis orci elementum e vel scelerisque. Amet ac tristique lectus. Morbi e suscipit scelerisque auctor curabitur velit metus gravida quis."
}
Example flow
[{"id":"325b6a4a.cf1706","type":"inject","z":"4affede3.af6f44","name":"","topic":"","payload":"","payloadType":"str","repeat":"","crontab":"","once":false,"x":110,"y":300,"wires":[["9d14acc0.c8d9d"]]},{"id":"96c9a04e.35232","type":"debug","z":"4affede3.af6f44","name":"","active":true,"console":"false","complete":"false","x":513,"y":300,"wires":[]},{"id":"9d14acc0.c8d9d","type":"data-generator","z":"4affede3.af6f44","name":"","field":"payload","fieldType":"msg","syntax":"json","template":"{\n \"name\": \"{{firstName}} {{lastName}}\",\n \"work\": \"{{company}}\",\n \"email\": \"{{email}}\",\n \"address\": \"{{int 1 100}} {{street}}\",\n \"country\": \"{{country}}\",\n \"countryCode\": \"{{countryCode}}\",\n \"text\":\"{{lorem 20}}\"\n}","x":280,"y":300,"wires":[["96c9a04e.35232"]]}]

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<!--
Copyright 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.
-->
<script type="text/x-red" data-template-name="data-generator">
<div class="form-row">
<label for="node-input-name"><i class="fa fa-tag"></i> <span data-i18n="node-red:common.label.name"></span></label>
<input type="text" id="node-input-name" data-i18n="[placeholder]node-red:common.label.name">
</div>
<div class="form-row">
<label for="node-input-field"><i class="fa fa-edit"></i> <span data-i18n="node-red:template.label.property"></span></label>
<input type="text" id="node-input-field" placeholder="payload" style="width:275px;">
<input type="hidden" id="node-input-fieldType">
</div>
<div class="form-row" style="position: relative; margin-bottom: 0px;">
<label for="node-input-template"><i class="fa fa-file-code-o"></i> <span data-i18n="node-red:template.label.template"></span></label>
<input type="hidden" id="node-input-template" autofocus="autofocus">
</div>
<div class="form-row node-text-editor-row">
<div style="height:250px;" class="node-text-editor" id="node-input-template-editor"></div>
</div>
<div class="form-row">
<label for="node-input-syntax"><i class="fa fa-code"></i> <span data-i18n="datagen.label.syntax"></span></label>
<select id="node-input-syntax" style="width:180px;">
<option value="text" data-i18n="datagen.label.text"></option>
<option value="json" data-i18n="datagen.label.json"></option>
</select>
</div>
</script>
<script type="text/x-red" data-help-name="data-generator">
<p>Creates dummy data strings based on a handlebars-style template.</p>
<p>Uses the <i><a href="https://github.com/webroo/dummy-json" target="_new">dummy-json</a></i>
module, which can create rich sets of dummy data for testing or other uses.</p>
<p>Will build a string or a parsed JSON object, creating values based on the helper names below:
<pre style="word-break:normal">title, firstname, lastname, company, domain, tld, email, street, city, country, countryCode, zipcode, postcode, lat, long, phone, color, hexColor, guid, ipv4, ipv6, lorem, date, time, lowercase, uppercase, int, float, boolean</pre>
<p>Multiple values can be generated by use of the <i>repeat</i> syntax.</p>
<p>In addition any properties passed in on <code>msg</code> can also be used - for example {{payload}}.</p>
<p>Finally <code>msg.seed</code> can be used to preset the pseudo-random seed to ensure repeatability across calls.</p>
</script>
<script type="text/javascript">
RED.nodes.registerType('data-generator',{
color:"rgb(243, 181, 103)",
category: 'function',
paletteLabel:"data&nbsp;generator",
defaults: {
name: {value:""},
field: {value:"payload"},
fieldType: {value:"msg"},
syntax: {value:"text"},
template: {value:"{\n \"name\": \"{{firstName}} {{lastName}}\",\n \"work\": \"{{company}}\",\n \"email\": \"{{email}}\",\n \"address\": \"{{int 1 100}} {{street}}\",\n \"country\": \"{{country}}\"\n}"}
},
inputs:1,
outputs:1,
icon: "template.png",
label: function() {
return this.name || "data generator";
},
oneditprepare: function() {
var that = this;
if (!this.fieldType) {
this.fieldType = 'msg';
}
$("#node-input-field").typedInput({
default: 'msg',
types: ['msg','flow','global'],
typeField: $("#node-input-fieldType")
});
this.editor = RED.editor.createEditor({
id: 'node-input-template-editor',
mode: 'ace/mode/handlebars',
value: $("#node-input-template").val()
});
RED.library.create({
url:"functions", // where to get the data from
type:"function", // the type of object the library is for
editor:that.editor, // the field name the main text body goes to
fields:['name','outputs']
});
this.editor.focus();
},
oneditsave: function() {
$("#node-input-template").val(this.editor.getValue())
delete this.editor;
},
oneditresize: function(size) {
var rows = $("#dialog-form>div:not(.node-text-editor-row)");
var height = $("#dialog-form").height();
for (var i=0;i<rows.size();i++) {
height -= $(rows[i]).outerHeight(true);
}
var editorRow = $("#dialog-form>div.node-text-editor-row");
height -= (parseInt(editorRow.css("marginTop"))+parseInt(editorRow.css("marginBottom")));
$(".node-text-editor").css("height",height+"px");
this.editor.resize();
}
});
</script>

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/**
* Copyright 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.
**/
module.exports = function(RED) {
"use strict";
var dummyjson = require('dummy-json');
function DataGeneratorNode(n) {
RED.nodes.createNode(this,n);
this.field = n.field || "payload";
this.template = n.template;
this.fieldType = n.fieldType || "msg";
this.syntax = n.syntax || "text";
var node = this;
node.on("input", function(msg) {
if (msg.seed) { dummyjson.seed = msg.seed; }
try {
var value = dummyjson.parse(node.template, {mockdata: msg});
if (node.syntax === "json") {
try { value = JSON.parse(value); }
catch(e) { node.error(RED._("datagen.errors.json-error")); }
}
if (node.fieldType === 'msg') {
RED.util.setMessageProperty(msg,node.field,value);
} else if (node.fieldType === 'flow') {
node.context().flow.set(node.field,value);
} else if (node.fieldType === 'global') {
node.context().global.set(node.field,value);
}
node.send(msg);
} catch(err) {
node.error(err.message);
}
});
}
RED.nodes.registerType("data-generator",DataGeneratorNode);
RED.library.register("datagenerator");
}

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{
"datagen": {
"label": {
"syntax": "Return",
"text": "a text string",
"json": "a parsed JSON object"
},
"errors": {
"json-error": "error trying to parse string to JSON"
}
}
}

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{
"name" : "node-red-node-data-generator",
"version" : "0.0.2",
"description" : "A Node-RED node to create a string of dummy data values from a template. Useful for test-cases.",
"dependencies" : {
"dummy-json": "1.0.*"
},
"repository" : {
"type":"git",
"url":"https://github.com/node-red/node-red-nodes/tree/master/function/data-generator"
},
"license": "Apache-2.0",
"keywords": [ "node-red", "data-generator", "dummy-json" ],
"node-red" : {
"nodes" : {
"data-generator": "datagenerator.js"
}
},
"author": {
"name": "Dave Conway-Jones",
"email": "ceejay@vnet.ibm.com",
"url": "http://nodered.org"
}
}