Gandalf

Gandalf is a (crazy) php library that handles functions.

Where use?

• php5.4+
• Where there are courageous people

Why use?

As we know, our prefer language has object semi opened, I mean, we can define instance fields in execution time, see below:

<?php

class Baggin
{

}

$bilbo = new Baggin;
$bilbo->hasRing =  true; 

var_dump($bilbo->hasRing); // true

But, we couldn't insert methods as functional programming languages (javascript, ruby ...)

<?php

class Elf
{

}

$legolas = new Elf;
$legolas->attack = function () {
    echo 'Goooo!';
};

$legolas->attack(); // Fatal error: Call to undefined method Elf::attack()

How use it

Use our trait:

<?php

class Elf
{
    use Gandalf\Entity\Caller;
}

$legolas = new Elf;
$legolas->attack = function () {
    echo 'Goooo!';
};

$legolas->attack(); // Goooo! =) 

Define function pattern

In Doctrine\ORM exists a method dynamic for search entities:

<?php

$repository->findOneByName('bar');
$repository->findByPlace('Middle earth');

with Gandalf you can write similar methods that use regex pattern, see below:

<?php

$legolas = new Elf;
$legolas->def('findBy([A-Z][a-z]+)', function($value){
    return "Find by {$this->_1}";
});

$legolas->findByName('bilbo'); // "return 'Find by Name'"

note that $this->_1 is a group var regex. You could too use var $this->matches[1].

Important: $this don't is the current context

<?php 
$legolas = new Elf;
$legolas->def('find(One){0,1}By([A-Z][a-z]+)', function($value){
    var_dump($this->matches);
});

$legolas->findByName('bilbo'); // "['findByName', null, 'Name']"
$legolas->findOneByFamily('bilbo'); // "['findOneByFamily', null, 'Family']"

Creating shortcuts

Many times, we need write compound calls like

<?php
return str_replace(' ', '-', strtolower(trim($foo)));

with Gandalf you can write this

<?php
$foo = new Elf;
$foo->short('getSlug', [
            ['trim', ":param1"],
            ['strtolower', ":return1"],
            ['str_replace',' ', '-',":return2"],
        ]);
$foo->getSlug('How use crazy Gandalf lib!'); // how-use-crazy-gandalf-lib

Why you should be careful before uses this library on production.

• Galdalf is a wizard, and wizards do magic. So, this library uses many php magic methods. The performance of the Galdalf can be a problem to your application.
• For now, it's possible create a function with invalid name. E.g; a regex '/[a-z]#[a-z]/' is acceptable, but you never will call $foo->a#a() .

And...

Contact-me on twitter or cloudson@outlook.com if you want talk about this project. It would be awesome!