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) | ||
| 59 | |||
| 60 | /** | ||
| 61 | * Render all the notifications' script to insert into script tag | ||
| 62 | * | ||
| 63 | * @return string | ||
| 64 | * | ||
| 65 | */ | ||
| 66 | public function render(): string | ||
| 79 | |||
| 80 | /** | ||
| 81 | * Add a notification | ||
| 82 | * | ||
| 83 | * @param string $type Could be error, info, success, or warning. | ||
| 84 | * @param string $text The notification's message | ||
| 85 | * @param string $title The notification's title | ||
|  | |||
| 86 | * @param array $options | ||
| 87 | * @param bool $onlyNextRequest if true(default), se the notification in session only for the next request | ||
| 88 | * | ||
| 89 | */ | ||
| 90 | public function add($theme, $timeout, $type, $layout, $text, $sounds = null, $soundsVolume = null) | ||
| 116 | |||
| 117 | public function addForNextRequest($theme, $timeout, $type, $layout, $text, $sounds = null, $soundsVolume = null) | ||
| 150 | |||
| 151 | /** | ||
| 152 | * Shortcut for adding an info notification | ||
| 153 | * | ||
| 154 | * @param string $message The notification's message | ||
| 155 | * @param string $title The notification's title | ||
| 156 | * @param array $options | ||
| 157 | */ | ||
| 158 | View Code Duplication | public function info($text, $onlyNextRequest = true, array $options = []) | |
| 166 | |||
| 167 | /** | ||
| 168 | * Shortcut for adding an error notification | ||
| 169 | * | ||
| 170 | * @param string $message The notification's message | ||
| 171 | * @param string $title The notification's title | ||
| 172 | * @param array $options | ||
| 173 | */ | ||
| 174 | View Code Duplication | public function error($text, $onlyNextRequest = true, array $options = []) | |
| 182 | |||
| 183 | /** | ||
| 184 | * Shortcut for adding a warning notification | ||
| 185 | * | ||
| 186 | * @param string $message The notification's message | ||
| 187 | * @param string $title The notification's title | ||
| 188 | * @param array $options | ||
| 189 | */ | ||
| 190 | View Code Duplication | public function warning($text, $onlyNextRequest = true, array $options = []) | |
| 198 | |||
| 199 | /** | ||
| 200 | * Shortcut for adding a success notification | ||
| 201 | * | ||
| 202 | * @param string $message The notification's message | ||
| 203 | * @param string $title The notification's title | ||
| 204 | * @param array $options | ||
| 205 | */ | ||
| 206 | View Code Duplication | public function success($text, $onlyNextRequest = true, array $options = []) | |
| 213 | |||
| 214 | |||
| 215 | /** | ||
| 216 | * Clear all notifications | ||
| 217 | * | ||
| 218 | * @param bool $withSession if true (default) clean notifications in session too. | ||
| 219 | */ | ||
| 220 | public function clear() | ||
| 224 | |||
| 225 | public function clearFlashed(bool $withSession = true) | ||
| 233 | |||
| 234 | public function clearAll(bool $withSession = true) | ||
| 243 | } | ||
| 244 | 
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.