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 * UglifyCss filter.
20 *
21 * @link https://github.com/fmarcia/UglifyCSS
22 * @author Franck Marcia <franck.marcia@gmail.com>
23 */
24class UglifyCssFilter extends BaseNodeFilter
25{
26    private $uglifycssBin;
27    private $nodeBin;
28
29    private $expandVars;
30    private $uglyComments;
31    private $cuteComments;
32
33    /**
34     * @param string $uglifycssBin Absolute path to the uglifycss executable
35     * @param string $nodeBin      Absolute path to the folder containg node.js executable
36     */
37    public function __construct($uglifycssBin = '/usr/bin/uglifycss', $nodeBin = null)
38    {
39        $this->uglifycssBin = $uglifycssBin;
40        $this->nodeBin = $nodeBin;
41    }
42
43    /**
44     * Expand variables
45     * @param bool $expandVars True to enable
46     */
47    public function setExpandVars($expandVars)
48    {
49        $this->expandVars = $expandVars;
50    }
51
52    /**
53     * Remove newlines within preserved comments
54     * @param bool $uglyComments True to enable
55     */
56    public function setUglyComments($uglyComments)
57    {
58        $this->uglyComments = $uglyComments;
59    }
60
61    /**
62     * Preserve newlines within and around preserved comments
63     * @param bool $cuteComments True to enable
64     */
65    public function setCuteComments($cuteComments)
66    {
67        $this->cuteComments = $cuteComments;
68    }
69
70    /**
71     * @see Assetic\Filter\FilterInterface::filterLoad()
72     */
73    public function filterLoad(AssetInterface $asset)
74    {
75    }
76
77    /**
78     * Run the asset through UglifyJs
79     *
80     * @see Assetic\Filter\FilterInterface::filterDump()
81     */
82    public function filterDump(AssetInterface $asset)
83    {
84        $pb = $this->createProcessBuilder($this->nodeBin
85            ? array($this->nodeBin, $this->uglifycssBin)
86            : array($this->uglifycssBin));
87
88        if ($this->expandVars) {
89            $pb->add('--expand-vars');
90        }
91
92        if ($this->uglyComments) {
93            $pb->add('--ugly-comments');
94        }
95
96        if ($this->cuteComments) {
97            $pb->add('--cute-comments');
98        }
99
100        // input and output files
101        $input = FilesystemUtils::createTemporaryFile('uglifycss');
102
103        file_put_contents($input, $asset->getContent());
104        $pb->add($input);
105
106        $proc = $pb->getProcess();
107        $code = $proc->run();
108        unlink($input);
109
110        if (127 === $code) {
111            throw new \RuntimeException('Path to node executable could not be resolved.');
112        }
113
114        if (0 !== $code) {
115            throw FilterException::fromProcess($proc)->setInput($asset->getContent());
116        }
117
118        $asset->setContent($proc->getOutput());
119    }
120}
121