node-json-transform

node-data-transform

Usage

var DataTransform = require("node-json-transform").DataTransform,

First we need some data.

var data = {
	posts : [
		{
			title : "title1",
			description: "description1",
			blog: "This is a blog.",
			date: "11/4/2013",
			extra : {
				link : "http://goo.cm"
			},
			list1:[
				{
					name:"mike"
				}
			],
			list2:[
				{
					item: "thing"
				}
			],
			clearMe: "text"
		}
	]
};

The map defines how the output will be structured and which operations to run.

var map = {
	list : 'posts',
	item: {
		name: "title",
		info: "description",
		text: "blog",
		date: "date",
		link: "extra.link",
		item: "list1.0.name",
		clearMe: "",
		fieldGroup: ['title', 'extra']
	},
	operate: [
		{
			run: "Date.parse", on: "date"
		},
		{
			run: function(val) { return val + " more info"}, on: "info"
		}
	]
};

You can read this as follows:

• Get the array of objects in "posts".
• Map the name to title, info to description etc.
• Run Data.parse on the date value

Run it

var dataTransform = DataTransform(data, map);
var result = dataTransform.transform();
console.log(result);

The expected output.

[{
	name : "title1",
	info: "description1",
	text: "This is a blog.",
	date: 1383544800000,
	link: "http://goo.cm",
	info: "mike more info",
	clearMe: "",
	fieldGroup: ['title1', { link : "http://goo.cm" }]
}]

Enjoy!

Changelog

1.0.6 Accepted pull request form ooskapenaar. You can now use custom functions as operators. 1.0.5 Accepted pull request from jaymedavis. You can now pass an array directly and leave 'list' undefined.
1.0.4 Added the ability to group fields into arrays
1.0.3 Added the ability to clear and set field by passing an empty string in the map.

Credits

• Michael Bosworth

License

(The MIT License)

Copyright (c) 2014 Michael Bosworth

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.