Duplicate code is one of the most pungent code smells. A rule that is often used is to re-structure code once it is duplicated in three or more places.
Common duplication problems, and corresponding solutions are:
Complex classes like Notifier 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 Notifier, and based on these observations, apply Extract Interface, too.
| 1 | <?php | ||
| 7 | class Notifier | ||
| 8 | { | ||
| 9 | |||
| 10 | /** | ||
| 11 | * Added notifications | ||
| 12 | * | ||
| 13 | * @var array | ||
| 14 | */ | ||
| 15 | protected $notifications = []; | ||
| 16 | |||
| 17 | /** | ||
| 18 | * Flashable added notifications | ||
| 19 | * | ||
| 20 | * @var array | ||
| 21 | */ | ||
| 22 | protected $flashedNotifications = []; | ||
| 23 | |||
| 24 | /** | ||
| 25 | * Added notifications | ||
| 26 | * | ||
| 27 | * @var array | ||
| 28 | */ | ||
| 29 | protected $options = []; | ||
| 30 | |||
| 31 | /** | ||
| 32 | * Illuminate Session | ||
| 33 | * | ||
| 34 | * @var \Illuminate\Session\SessionManager | ||
| 35 | */ | ||
| 36 | protected $session; | ||
| 37 | |||
| 38 | /** | ||
| 39 | * Constructor | ||
| 40 | * | ||
| 41 | * @param \Illuminate\Session\SessionManager $session | ||
| 42 | * | ||
| 43 | * @internal param \Illuminate\Session\SessionManager $session | ||
| 44 | */ | ||
| 45 | public function __construct(SessionManager $session) | ||
| 60 | |||
| 61 | /** | ||
| 62 | * Set all notification that are present in session | ||
| 63 | * | ||
| 64 | * @return void | ||
| 65 | */ | ||
| 66 | public function setNotifyFromSession(): void | ||
| 73 | |||
| 74 | /** | ||
| 75 | */ | ||
| 76 | protected function setNotifyErrorFromSession(): void | ||
| 80 | |||
| 81 | /** | ||
| 82 | */ | ||
| 83 | protected function setNotifyWarningFromSession(): void | ||
| 87 | |||
| 88 | /** | ||
| 89 | */ | ||
| 90 | protected function setNotifyInfoFromSession(): void | ||
| 94 | |||
| 95 | /** | ||
| 96 | */ | ||
| 97 | protected function setNotifySuccessFromSession(): void | ||
| 101 | /** | ||
| 102 | * Set all notification of a label type that are present in session | ||
| 103 | * | ||
| 104 | * @param string $label | ||
| 105 | * | ||
| 106 | * @return void | ||
| 107 | */ | ||
| 108 | protected function setNotifyFromSessionByLabel(string $label): void | ||
| 138 | |||
| 139 | /** | ||
| 140 | * Render all the notifications' script to insert into script tag | ||
| 141 | * | ||
| 142 | * @return string | ||
| 143 | * | ||
| 144 | */ | ||
| 145 | public function render(): string | ||
| 158 | |||
| 159 | /** | ||
| 160 | * Add a notification | ||
| 161 | * | ||
| 162 | * @param string $type Could be error, info, success, or warning. | ||
| 163 | * @param string $text The notification's message | ||
| 164 | * @param string $title The notification's title | ||
|  | |||
| 165 | * @param array $options | ||
| 166 | * @param bool $onlyNextRequest if true(default), se the notification in session only for the next request | ||
| 167 | * | ||
| 168 | */ | ||
| 169 | public function add($theme, $timeout, $type, $layout, $text, $sounds = null, $soundsVolume = null) | ||
| 195 | |||
| 196 | public function addForNextRequest($theme, $timeout, $type, $layout, $text, $sounds = null, $soundsVolume = null) | ||
| 229 | |||
| 230 | /** | ||
| 231 | * Shortcut for adding an info notification | ||
| 232 | * | ||
| 233 | * @param string $message The notification's message | ||
| 234 | * @param string $title The notification's title | ||
| 235 | * @param array $options | ||
| 236 | */ | ||
| 237 | View Code Duplication | public function info($text, $onlyNextRequest = false, array $options = []) | |
| 248 | |||
| 249 | /** | ||
| 250 | * Shortcut for adding an error notification | ||
| 251 | * | ||
| 252 | * @param string $message The notification's message | ||
| 253 | * @param string $title The notification's title | ||
| 254 | * @param array $options | ||
| 255 | */ | ||
| 256 | View Code Duplication | public function error($text, $onlyNextRequest = false, array $options = []) | |
| 267 | |||
| 268 | /** | ||
| 269 | * Shortcut for adding a warning notification | ||
| 270 | * | ||
| 271 | * @param string $message The notification's message | ||
| 272 | * @param string $title The notification's title | ||
| 273 | * @param array $options | ||
| 274 | */ | ||
| 275 | View Code Duplication | public function warning($text, $onlyNextRequest = false, array $options = []) | |
| 286 | |||
| 287 | /** | ||
| 288 | * Shortcut for adding a success notification | ||
| 289 | * | ||
| 290 | * @param string $message The notification's message | ||
| 291 | * @param string $title The notification's title | ||
| 292 | * @param array $options | ||
| 293 | */ | ||
| 294 | View Code Duplication | public function success($text, $onlyNextRequest = false, array $options = []) | |
| 305 | |||
| 306 | |||
| 307 | /** | ||
| 308 | * Clear all notifications | ||
| 309 | * | ||
| 310 | * @param bool $withSession if true (default) clean notifications in session too. | ||
| 311 | */ | ||
| 312 | public function clear() | ||
| 316 | |||
| 317 | public function clearFlashed(bool $withSession = true) | ||
| 325 | |||
| 326 | public function clearAll(bool $withSession = true) | ||
| 335 | } | ||
| 336 | 
This check looks for PHPDoc comments describing methods or function parameters that do not exist on the corresponding method or function.
Consider the following example. The parameter
$italyis not defined by the methodfinale(...).The most likely cause is that the parameter was removed, but the annotation was not.