1 | <?php |
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2 | |
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3 | /* |
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4 | * This file is part of the Assetic package, an OpenSky project. |
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5 | * |
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6 | * (c) 2010-2012 OpenSky Project Inc |
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7 | * |
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8 | * For the full copyright and license information, please view the LICENSE |
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9 | * file that was distributed with this source code. |
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10 | */ |
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11 | |
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12 | namespace Assetic\Factory\Loader; |
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13 | |
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14 | use Assetic\Factory\AssetFactory; |
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15 | use Assetic\Factory\Resource\ResourceInterface; |
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16 | |
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17 | /** |
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18 | * Loads asset formulae from PHP files. |
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19 | * |
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20 | * @author Kris Wallsmith <kris.wallsmith@gmail.com> |
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21 | */ |
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22 | abstract class BasePhpFormulaLoader implements FormulaLoaderInterface |
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23 | { |
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24 | protected $factory; |
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25 | protected $prototypes; |
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26 | |
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27 | public function __construct(AssetFactory $factory) |
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28 | { |
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29 | $this->factory = $factory; |
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30 | $this->prototypes = array(); |
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31 | |
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32 | foreach ($this->registerPrototypes() as $prototype => $options) { |
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33 | $this->addPrototype($prototype, $options); |
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34 | } |
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35 | } |
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36 | |
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37 | public function addPrototype($prototype, array $options = array()) |
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38 | { |
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39 | $tokens = token_get_all('<?php '.$prototype); |
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40 | array_shift($tokens); |
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41 | |
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42 | $this->prototypes[$prototype] = array($tokens, $options); |
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43 | } |
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44 | |
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45 | public function load(ResourceInterface $resource) |
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46 | { |
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47 | if (!$nbProtos = count($this->prototypes)) { |
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48 | throw new \LogicException('There are no prototypes registered.'); |
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49 | } |
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50 | |
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51 | $buffers = array_fill(0, $nbProtos, ''); |
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52 | $bufferLevels = array_fill(0, $nbProtos, 0); |
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53 | $buffersInWildcard = array(); |
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54 | |
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55 | $tokens = token_get_all($resource->getContent()); |
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56 | $calls = array(); |
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57 | |
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58 | while ($token = array_shift($tokens)) { |
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59 | $current = self::tokenToString($token); |
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60 | // loop through each prototype (by reference) |
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61 | foreach (array_keys($this->prototypes) as $i) { |
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62 | $prototype =& $this->prototypes[$i][0]; |
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63 | $options = $this->prototypes[$i][1]; |
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64 | $buffer =& $buffers[$i]; |
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65 | $level =& $bufferLevels[$i]; |
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66 | |
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67 | if (isset($buffersInWildcard[$i])) { |
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68 | switch ($current) { |
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69 | case '(': ++$level; break; |
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70 | case ')': --$level; break; |
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71 | } |
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72 | |
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73 | $buffer .= $current; |
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74 | |
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75 | if (!$level) { |
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76 | $calls[] = array($buffer.';', $options); |
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77 | $buffer = ''; |
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78 | unset($buffersInWildcard[$i]); |
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79 | } |
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80 | } elseif ($current == self::tokenToString(current($prototype))) { |
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81 | $buffer .= $current; |
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82 | if ('*' == self::tokenToString(next($prototype))) { |
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83 | $buffersInWildcard[$i] = true; |
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84 | ++$level; |
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85 | } |
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86 | } else { |
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87 | reset($prototype); |
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88 | unset($buffersInWildcard[$i]); |
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89 | $buffer = ''; |
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90 | } |
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91 | } |
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92 | } |
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93 | |
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94 | $formulae = array(); |
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95 | foreach ($calls as $call) { |
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96 | $formulae += call_user_func_array(array($this, 'processCall'), $call); |
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97 | } |
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98 | |
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99 | return $formulae; |
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100 | } |
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101 | |
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102 | private function processCall($call, array $protoOptions = array()) |
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103 | { |
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104 | $tmp = tempnam(sys_get_temp_dir(), 'assetic'); |
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105 | file_put_contents($tmp, implode("\n", array( |
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106 | '<?php', |
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107 | $this->registerSetupCode(), |
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108 | $call, |
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109 | 'echo serialize($_call);', |
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110 | ))); |
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111 | $args = unserialize(shell_exec('php '.escapeshellarg($tmp))); |
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112 | unlink($tmp); |
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113 | |
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114 | $inputs = isset($args[0]) ? self::argumentToArray($args[0]) : array(); |
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115 | $filters = isset($args[1]) ? self::argumentToArray($args[1]) : array(); |
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116 | $options = isset($args[2]) ? $args[2] : array(); |
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117 | |
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118 | if (!isset($options['debug'])) { |
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119 | $options['debug'] = $this->factory->isDebug(); |
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120 | } |
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121 | |
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122 | if (!is_array($options)) { |
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123 | throw new \RuntimeException('The third argument must be omitted, null or an array.'); |
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124 | } |
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125 | |
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126 | // apply the prototype options |
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127 | $options += $protoOptions; |
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128 | |
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129 | if (!isset($options['name'])) { |
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130 | $options['name'] = $this->factory->generateAssetName($inputs, $filters, $options); |
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131 | } |
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132 | |
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133 | return array($options['name'] => array($inputs, $filters, $options)); |
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134 | } |
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135 | |
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136 | /** |
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137 | * Returns an array of prototypical calls and options. |
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138 | * |
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139 | * @return array Prototypes and options |
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140 | */ |
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141 | abstract protected function registerPrototypes(); |
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142 | |
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143 | /** |
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144 | * Returns setup code for the reflection scriptlet. |
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145 | * |
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146 | * @return string Some PHP setup code |
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147 | */ |
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148 | abstract protected function registerSetupCode(); |
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149 | |
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150 | protected static function tokenToString($token) |
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151 | { |
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152 | return is_array($token) ? $token[1] : $token; |
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153 | } |
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154 | |
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155 | protected static function argumentToArray($argument) |
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156 | { |
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157 | return is_array($argument) ? $argument : array_filter(array_map('trim', explode(',', $argument))); |
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158 | } |
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159 | } |
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