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   1  <?php
   2  
   3  /*
   4   * This file is part of Twig.
   5   *
   6   * (c) Fabien Potencier
   7   * (c) Armin Ronacher
   8   *
   9   * For the full copyright and license information, please view the LICENSE
  10   * file that was distributed with this source code.
  11   */
  12  
  13  namespace Twig\Node;
  14  
  15  use Twig\Compiler;
  16  
  17  /**
  18   * Represents an if node.
  19   *
  20   * @author Fabien Potencier <fabien@symfony.com>
  21   */
  22  class IfNode extends Node
  23  {
  24      public function __construct(\Twig_NodeInterface $tests, \Twig_NodeInterface $else = null, $lineno, $tag = null)
  25      {
  26          $nodes = ['tests' => $tests];
  27          if (null !== $else) {
  28              $nodes['else'] = $else;
  29          }
  30  
  31          parent::__construct($nodes, [], $lineno, $tag);
  32      }
  33  
  34      public function compile(Compiler $compiler)
  35      {
  36          $compiler->addDebugInfo($this);
  37          for ($i = 0, $count = \count($this->getNode('tests')); $i < $count; $i += 2) {
  38              if ($i > 0) {
  39                  $compiler
  40                      ->outdent()
  41                      ->write('} elseif (')
  42                  ;
  43              } else {
  44                  $compiler
  45                      ->write('if (')
  46                  ;
  47              }
  48  
  49              $compiler
  50                  ->subcompile($this->getNode('tests')->getNode($i))
  51                  ->raw(") {\n")
  52                  ->indent()
  53                  ->subcompile($this->getNode('tests')->getNode($i + 1))
  54              ;
  55          }
  56  
  57          if ($this->hasNode('else')) {
  58              $compiler
  59                  ->outdent()
  60                  ->write("} else {\n")
  61                  ->indent()
  62                  ->subcompile($this->getNode('else'))
  63              ;
  64          }
  65  
  66          $compiler
  67              ->outdent()
  68              ->write("}\n");
  69      }
  70  }
  71  
  72  class_alias('Twig\Node\IfNode', 'Twig_Node_If');