Complex classes like Request often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes. You can also have a look at the cohesion graph to spot any un-connected, or weakly-connected components.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use Request, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 9 | class Request |
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| 10 | { |
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| 11 | /** |
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| 12 | * Reference to instantiated controller object. |
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| 13 | * |
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| 14 | * @var object |
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| 15 | */ |
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| 16 | protected static $instance; |
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| 17 | |||
| 18 | /** |
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| 19 | * System configuration |
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| 20 | * |
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| 21 | * @var object |
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| 22 | */ |
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| 23 | private $configuration; |
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| 24 | |||
| 25 | |||
| 26 | /** |
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| 27 | * normalized $_GET superglobal |
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| 28 | * |
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| 29 | * @var array |
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| 30 | * @access private |
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| 31 | */ |
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| 32 | |||
| 33 | private $getContainer = []; |
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| 34 | |||
| 35 | /** |
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| 36 | * normalized $_POST superglobal |
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| 37 | * |
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| 38 | * @var array |
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| 39 | * @access private |
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| 40 | */ |
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| 41 | |||
| 42 | private $postContainer = []; |
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| 43 | |||
| 44 | /** |
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| 45 | * normalized $_DELETE superglobal |
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| 46 | * |
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| 47 | * @var array |
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| 48 | * @access private |
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| 49 | */ |
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| 50 | |||
| 51 | private $deleteContainer = []; |
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| 52 | |||
| 53 | /** |
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| 54 | * normalized $_PUT superglobal |
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| 55 | * |
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| 56 | * @var array |
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| 57 | * @access private |
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| 58 | */ |
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| 59 | |||
| 60 | private $putContainer = []; |
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| 61 | |||
| 62 | /** |
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| 63 | * normalized $_SESSION superglobal |
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| 64 | * |
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| 65 | * @var array |
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| 66 | * @access private |
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| 67 | */ |
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| 68 | |||
| 69 | private $sessionContainer = []; |
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| 70 | |||
| 71 | /** |
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| 72 | * normalized $_COOKIE superglobal |
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| 73 | * |
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| 74 | * @var array |
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| 75 | * @access private |
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| 76 | */ |
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| 77 | |||
| 78 | private $cookieContainer = []; |
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| 79 | |||
| 80 | /** |
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| 81 | * normalized $_FILES superglobal |
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| 82 | * |
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| 83 | * @var array |
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| 84 | * @access private |
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| 85 | */ |
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| 86 | |||
| 87 | private $filesContainer = []; |
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| 88 | |||
| 89 | /** |
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| 90 | * normalized $_SERVER superglobal |
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| 91 | * |
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| 92 | * @var array |
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| 93 | * @access private |
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| 94 | */ |
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| 95 | |||
| 96 | private $serverContainer = []; |
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| 97 | |||
| 98 | |||
| 99 | /** |
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| 100 | * Flashdata container |
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| 101 | * |
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| 102 | * @var array |
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| 103 | * @access private |
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| 104 | */ |
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| 105 | |||
| 106 | private $flashdata = []; |
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| 107 | |||
| 108 | /** |
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| 109 | * Flashdata identifier |
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| 110 | * |
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| 111 | * @var string |
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| 112 | * @access private |
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| 113 | * @TODO: move flashdata to sessionhandler, make available here with other request vars still |
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| 114 | */ |
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| 115 | |||
| 116 | |||
| 117 | private $flashdataId = '_z_session_flashdata'; |
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| 118 | |||
| 119 | |||
| 120 | /** |
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| 121 | * Normalizes superglobals, handles flashdata |
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| 122 | */ |
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| 123 | |||
| 124 | 18 | public function __construct() |
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| 125 | { |
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| 126 | 18 | self::$instance = $this; |
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| 127 | 18 | $app = App::getInstance(); |
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| 128 | 18 | $this->configuration = $app->getConfiguration(); |
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| 129 | |||
| 130 | 18 | if( !empty($this->configuration->session) ) { |
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| 131 | if ($this->configuration->session !== false && $this->configuration->session->flashdataId) { |
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| 132 | $this->flashdataId = $this->configuration->session->flashdataId; |
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| 133 | } |
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| 134 | } |
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| 135 | |||
| 136 | // $config = \HTMLPurifier_Config::createDefault(); |
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| 137 | // $this->purifier = new \HTMLPurifier($config); |
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| 138 | |||
| 139 | 18 | if (!empty($_SESSION)) { |
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| 140 | $this->sessionContainer = $this->normalize($_SESSION); |
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| 141 | } |
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| 142 | 18 | $this->registerFlashdata(); |
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| 143 | |||
| 144 | 18 | $this->getContainer = $this->normalize($_GET); |
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| 145 | 18 | $this->postContainer = $this->normalize($_POST); |
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| 146 | 18 | $this->cookieContainer = $this->normalize($_COOKIE); |
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| 147 | 18 | $this->filesContainer = $this->normalize($_FILES); |
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| 148 | 18 | $this->serverContainer = $this->normalize($_SERVER); |
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| 149 | 18 | if ($this->serverContainer['REQUEST_METHOD'] === 'PUT') { |
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| 150 | parse_str(file_get_contents('php://input', "r"), $PUT); |
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| 151 | $this->putContainer = $this->normalize($PUT); |
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| 152 | 18 | } elseif ($this->serverContainer['REQUEST_METHOD'] === 'DELETE') { |
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| 153 | parse_str(file_get_contents('php://input', "r"), $DELETE); |
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| 154 | $this->deleteContainer = $this->normalize($DELETE); |
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| 155 | } |
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| 156 | 18 | } |
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| 157 | |||
| 158 | /** |
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| 159 | * Processes current requests flashdata, recycles old. |
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| 160 | * |
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| 161 | * @access private |
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| 162 | */ |
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| 163 | 18 | private function registerFlashdata() |
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| 164 | { |
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| 165 | 18 | if (!empty($this->sessionContainer[$this->flashdataId])) { |
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| 166 | $this->flashdata = unserialize(base64_decode($this->session($this->flashdataId))); |
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| 167 | // and destroy the temporary session variable |
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| 168 | unset($_SESSION[$this->flashdataId]); |
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| 169 | |||
| 170 | |||
| 171 | if (!empty($this->flashdata)) { |
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| 172 | // iterate through all the entries |
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| 173 | foreach ($this->flashdata as $variable => $data) { |
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| 174 | // increment counter representing server requests |
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| 175 | $this->flashdata[$variable]['inc'] ++; |
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| 176 | |||
| 177 | // if we're past the first server request |
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| 178 | if ($this->flashdata[$variable]['inc'] > 1) { |
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| 179 | // unset the session variable |
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| 180 | unset($_SESSION[$variable]); |
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| 181 | |||
| 182 | // stop tracking |
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| 183 | unset($this->flashdata[$variable]); |
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| 184 | } |
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| 185 | } |
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| 186 | |||
| 187 | // if there is any flashdata left to be handled |
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| 188 | if (!empty($this->flashdata)) { |
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| 189 | // store data in a temporary session variable |
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| 190 | $_SESSION[$this->flashdataId] = base64_encode(serialize($this->flashdata)); |
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| 191 | } |
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| 192 | } |
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| 193 | } |
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| 194 | 18 | } |
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| 195 | |||
| 196 | /** |
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| 197 | * Sets flashdata |
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| 198 | * |
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| 199 | * @access public |
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| 200 | * |
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| 201 | * @params string $name |
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| 202 | * @params mixed $value |
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| 203 | */ |
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| 204 | |||
| 205 | public function setFlashdata($name, $value) |
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| 219 | |||
| 220 | /** |
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| 221 | * Gets flashdata |
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| 222 | * |
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| 223 | * @access public |
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| 224 | * |
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| 225 | * @params string $name |
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| 226 | */ |
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| 227 | |||
| 228 | public function getFlashdata($name = false, $default = false) |
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| 229 | { |
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| 230 | if ($name === false && !empty($this->flashdata)) { |
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| 231 | return $this->flashdata; |
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| 232 | } |
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| 233 | if ($name !== false) { |
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| 234 | if (!empty($this->flashdata[$name]['value'])) { |
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| 235 | return $this->flashdata[$name]['value']; |
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| 236 | } |
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| 237 | } |
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| 238 | |||
| 239 | return $default; |
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| 240 | } |
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| 241 | |||
| 242 | /** |
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| 243 | * Remove session data |
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| 244 | * |
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| 245 | * @access public |
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| 246 | * |
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| 247 | * @params string $index |
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| 248 | */ |
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| 249 | public function removeSession($index) |
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| 255 | |||
| 256 | /** |
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| 257 | * Set session data |
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| 258 | * |
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| 259 | * @access public |
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| 260 | * |
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| 261 | * @params string $index |
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| 262 | * @params mixed $value |
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| 263 | */ |
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| 264 | |||
| 265 | public function setSession($index = false, $value = false) |
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| 282 | |||
| 283 | /** |
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| 284 | * Dumps all session data |
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| 285 | * |
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| 286 | * @access public |
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| 287 | */ |
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| 288 | public function destroySession() |
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| 308 | |||
| 309 | /** |
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| 310 | * Normalizes data |
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| 311 | * |
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| 312 | * @access private |
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| 313 | * @TODO: expand functionality, set/perform based on configuration |
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| 314 | */ |
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| 315 | 18 | private function normalize($data) |
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| 366 | |||
| 367 | public function __call($name, $arguments) |
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| 396 | } |
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| 397 |
Instead of super-globals, we recommend to explicitly inject the dependencies of your class. This makes your code less dependent on global state and it becomes generally more testable: