1<?php
2
3/*
4 * This file is part of the Assetic package, an OpenSky project.
5 *
6 * (c) 2010-2014 OpenSky Project Inc
7 *
8 * For the full copyright and license information, please view the LICENSE
9 * file that was distributed with this source code.
10 */
11
12namespace Assetic\Filter;
13
14use Assetic\Asset\AssetInterface;
15use Assetic\Exception\FilterException;
16use Assetic\Util\FilesystemUtils;
17
18/**
19 * Compiles Handlebars templates into Javascript.
20 *
21 * @link http://handlebarsjs.com/
22 * @author Keyvan Akbary <keyvan@funddy.com>
23 */
24class HandlebarsFilter extends BaseNodeFilter
25{
26    private $handlebarsBin;
27    private $nodeBin;
28
29    private $minimize = false;
30    private $simple = false;
31
32    public function __construct($handlebarsBin = '/usr/bin/handlebars', $nodeBin = null)
33    {
34        $this->handlebarsBin = $handlebarsBin;
35        $this->nodeBin = $nodeBin;
36    }
37
38    public function setMinimize($minimize)
39    {
40        $this->minimize = $minimize;
41    }
42
43    public function setSimple($simple)
44    {
45        $this->simple = $simple;
46    }
47
48    public function filterLoad(AssetInterface $asset)
49    {
50        $pb = $this->createProcessBuilder($this->nodeBin
51            ? array($this->nodeBin, $this->handlebarsBin)
52            : array($this->handlebarsBin));
53
54        if ($sourcePath = $asset->getSourcePath()) {
55            $templateName = basename($sourcePath);
56        } else {
57            throw new \LogicException('The handlebars filter requires that assets have a source path set');
58        }
59
60        $inputDirPath = FilesystemUtils::createThrowAwayDirectory('handlebars_in');
61        $inputPath = $inputDirPath.DIRECTORY_SEPARATOR.$templateName;
62        $outputPath = FilesystemUtils::createTemporaryFile('handlebars_out');
63
64        file_put_contents($inputPath, $asset->getContent());
65
66        $pb->add($inputPath)->add('-f')->add($outputPath);
67
68        if ($this->minimize) {
69            $pb->add('--min');
70        }
71
72        if ($this->simple) {
73            $pb->add('--simple');
74        }
75
76        $process = $pb->getProcess();
77        $returnCode = $process->run();
78
79        unlink($inputPath);
80        rmdir($inputDirPath);
81
82        if (127 === $returnCode) {
83            throw new \RuntimeException('Path to node executable could not be resolved.');
84        }
85
86        if (0 !== $returnCode) {
87            if (file_exists($outputPath)) {
88                unlink($outputPath);
89            }
90            throw FilterException::fromProcess($process)->setInput($asset->getContent());
91        }
92
93        if (!file_exists($outputPath)) {
94            throw new \RuntimeException('Error creating output file.');
95        }
96
97        $compiledJs = file_get_contents($outputPath);
98        unlink($outputPath);
99
100        $asset->setContent($compiledJs);
101    }
102
103    public function filterDump(AssetInterface $asset)
104    {
105    }
106}
107