Twig training 2

marco-sample.twig

{{ macro_buttons.button1('...') }}

Project_Set_Node.php

<?php
class Project_Set_Node extends Twig_Node
{
    public function __construct($name, Twig_Node_Expression $value, $lineno)
    {
        parent::__construct(array('value' => $value), array('name' => $name), $lineno);
    }

    public function compile(Twig_Compiler $compiler)
    {
        $compiler
            ->addDebugInfo($this)
            ->write('$context[\''.$this->getAttribute('name').'\'] = ')
            ->subcompile($this->getNode('value'))
            ->raw(";\n")
        ;
    }
}

Project_Set_TokenParser.php

<?php
class Project_Set_TokenParser extends Twig_TokenParser
{
    public function parse(Twig_Token $token)
    {
        $lineno = $token->getLine();
        $name = $this->parser->getStream()->expect(Twig_Token::NAME_TYPE)->getValue();
        $this->parser->getStream()->expect(Twig_Token::OPERATOR_TYPE, '=');
        $value = $this->parser->getExpressionParser()->parseExpression();

        $this->parser->getStream()->expect(Twig_Token::BLOCK_END_TYPE);

        return new Project_Set_Node($name, $value, $lineno, $this->getTag());
    }

    public function getTag()
    {
        return 'set';
    }
}

register-filter.php

<?php
// Filtres : 

$twig->addFilter('rot13', new Twig_Filter_Function('str_rot13'));
// ou
$twig->addFilter('rot13', new Twig_Filter_Function('SomeClass::rot13Filter'));
// ou
$twig->addFilter('rot13', new Twig_Filter_Method($this,'rot13Filter'));

// Filtres dynamiques :
$twig->addFilter('*_path', new Twig_Filter_Function('twig_path'));

function twig_path($name, $arguments)
{
    // ...
}


// Exemple :

// {{ 'shoes_ref_abc' | shoes_path }}
// will call  
twig_path('shoes', 'shoes_ref_abc');

register-tag.php

<?php
$twig->addTokenParser(new Project_Set_TokenParser());

twig-extension.php

<?php
class Project_Twig_Extension extends Twig_Extension
{
    public function getFilters()
    {
        return array(
            'rot13' => new Twig_Filter_Method($this, 'rot13Filter'),
        );
    }

    public function rot13Filter($string)
    {
        return str_rot13($string);
    }

    // ...
}