Hurl

Hurl is a data transformation framework, designed to compose complex transformations., _(*1)

Installation

You will need composer require sysvyz/hurl, _(*2)

Usage

Hurl is designed to build algorithms as datastructures. Each algorithm is represented by a tree. A tree is represented by its root node. Trees should be stateless (and immutable) in order to reuse them. A Node represents a data transformation., _(*3)

Creating Nodes

A Node is basically wrapper for functions or Closures if you like. Like functions Nodes have inputs(parameters) and a output., _(*4)


$fromHex = Node::call(function ($data) {
    return hexdec($data);
});
var_dump($fromHex('a'));

//int(10)

Build-in transformations

Nodes are transformation rules. There are several build-in php functions wrapped as Node, _(*5)



$explode = Node::explode('.');
var_dump($explode('a.b'));
//array(2) {
//  [0]=>
//  string(1) "a"
//  [1]=>
//  string(1) "b"
//}

Chained transformations

Nodes can be chained to perform multiple consecutive transformations, _(*6)



$chain = $explode->implode('-');
var_dump($chain('a.b'));
//string(3) "a-b"

Map

One of the most common transformation is array_map. Node provides a convenient way of performing those operations. Since the callback function of array_map is nothing else than a transformation, it's obvious to use Nodes as callbacks., _(*7)



$map = $explode->map($fromHex)->implode('.');
var_dump($map('a.b'));
//string(5) "10.11"

Sort



$sort = Node::ARRAY()->sort(function ($a,$b){
    return $a-$b;
});
var_dump($sort([2,5,3,4,1]));
//array(5) {
//  [0]=>
//  int(1)
//  [1]=>
//  int(2)
//  [2]=>
//  int(3)
//  [3]=>
//  int(4)
//  [4]=>
//  int(5)
//}