1: <?php
 2: 
 3: class CssShell extends Shell {
 4: 
 5:     /**
 6:      * get the option parser.
 7:      *
 8:      * @return ConsoleOptionParser
 9:      */
10:     public function getOptionParser() {
11:         $parser = parent::getOptionParser();
12:         return $parser;
13:     }
14: 
15:     public function main() {
16:         $cssFile = $this->args[0];
17:         $css = file_get_contents($cssFile);
18:         $colors = $this->_getColorsCodes($css);
19:         $vars = $this->_variables($colors);
20: 
21:         file_put_contents('out.css', $this->_buildCss($css, $colors, $vars));
22:         file_put_contents('variables.ini', $this->_buildVariables($vars));
23:     }
24: 
25:     private function _variables($colors) {
26:         $index = 0;
27:         $vars = array();
28:         foreach (array_unique($colors) as $color) {
29:             $vars['color' . ($index + 1)] = $color;
30:             $index++;
31:         }
32:         return $vars;
33:     }
34: 
35:     private function _buildVariables($vars) {
36:         $b = '';
37:         foreach ($vars as $name => $value) {
38:             $b .= "$name=#$value\n";
39:         }
40:         return $b;
41:     }
42: 
43:     private function _buildCss($css, $colors, $vars) {
44:         foreach ($colors as $orig => $canonized) {
45:             $var = array_search($canonized, $vars);
46:             $css = preg_replace('/#' . $orig . '(?![0-9a-fA-F])/', '$' . $var, $css);
47:         }
48:         return $css;
49:     }
50: 
51:     private function _getColorsCodes($css) {
52:         if (preg_match_all('/#([0-9a-fA-F]{3,6})(?![0-9a-fA-F])/', $css, $colors)) {
53:             $uniq = array();
54:             foreach ($colors[1] as $c) {
55:                 $uniq[$c] = $this->_canonicalColor($c);
56:             }
57:             return $uniq;
58:         } else {
59:             return array();
60:         }
61:     }
62: 
63:     private function _canonicalColor($color) {
64:         if (strlen($color) == 3) {
65:             $six = '';
66:             for ($k = 0; $k < strlen($color); ++$k) {
67:                 $six .=$color[$k] . $color[$k];
68:             }
69:         } else {
70:             $six = $color;
71:         }
72: 
73:         return strtolower($six);
74:     }
75: 
76: }