IfNode.php

<?php


/*
 * This file is part of Twig.
 *
 * (c) Fabien Potencier
 * (c) Armin Ronacher
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
namespace Twig\Node;

use Twig\Attribute\YieldReady;
use Twig\Compiler;

/**
 * Represents an if node.
 *
 * @author Fabien Potencier <fabien@symfony.com>
 */
class IfNode extends Node {
    public function __construct(Node $tests, ?Node $else, int $lineno) {
        $nodes = [
            'tests' => $tests,
        ];
        if (null !== $else) {
            $nodes['else'] = $else;
        }
        parent::__construct($nodes, [], $lineno);
    }
    public function compile(Compiler $compiler) : void {
        $compiler->addDebugInfo($this);
        for ($i = 0, $count = \count($this->getNode('tests')); $i < $count; $i += 2) {
            if ($i > 0) {
                $compiler->outdent()
                    ->write('} elseif (');
            }
            else {
                $compiler->write('if (');
            }
            $compiler->subcompile($this->getNode('tests')
                ->getNode((string) $i))
                ->raw(") {\n")
                ->indent();
            // The node might not exists if the content is empty
            if ($this->getNode('tests')
                ->hasNode((string) ($i + 1))) {
                $compiler->subcompile($this->getNode('tests')
                    ->getNode((string) ($i + 1)));
            }
        }
        if ($this->hasNode('else')) {
            $compiler->outdent()
                ->write("} else {\n")
                ->indent()
                ->subcompile($this->getNode('else'));
        }
        $compiler->outdent()
            ->write("}\n");
    }

}