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 MenuBuilder 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 MenuBuilder, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 10 | class MenuBuilder implements Countable |
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| 11 | { |
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| 12 | /** |
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| 13 | * Menu name. |
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| 14 | * |
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| 15 | * @var string |
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| 16 | */ |
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| 17 | protected $menu; |
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| 18 | |||
| 19 | /** |
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| 20 | * Array menu items. |
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| 21 | * |
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| 22 | * @var array |
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| 23 | */ |
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| 24 | protected $items = []; |
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| 25 | |||
| 26 | /** |
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| 27 | * Default presenter class. |
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| 28 | * |
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| 29 | * @var string |
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| 30 | */ |
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| 31 | protected $presenter = Presenters\Bootstrap\NavbarPresenter::class; |
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| 32 | |||
| 33 | /** |
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| 34 | * Style name for each presenter. |
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| 35 | * |
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| 36 | * @var array |
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| 37 | */ |
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| 38 | protected $styles = []; |
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| 39 | |||
| 40 | /** |
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| 41 | * Prefix URL. |
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| 42 | * |
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| 43 | * @var string|null |
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| 44 | */ |
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| 45 | protected $prefixUrl; |
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| 46 | |||
| 47 | /** |
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| 48 | * The name of view presenter. |
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| 49 | * |
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| 50 | * @var string |
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| 51 | */ |
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| 52 | protected $view; |
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| 53 | |||
| 54 | /** |
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| 55 | * The laravel view factory instance. |
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| 56 | * |
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| 57 | * @var \Illuminate\View\Factory |
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| 58 | */ |
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| 59 | protected $views; |
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| 60 | |||
| 61 | /** |
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| 62 | * Determine whether the ordering feature is enabled or not. |
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| 63 | * |
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| 64 | * @var boolean |
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| 65 | */ |
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| 66 | protected $ordering = false; |
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| 67 | |||
| 68 | /** |
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| 69 | * Resolved item binding map. |
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| 70 | * |
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| 71 | * @var array |
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| 72 | */ |
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| 73 | protected $bindings = []; |
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| 74 | /** |
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| 75 | * @var Repository |
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| 76 | */ |
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| 77 | private $config; |
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| 78 | |||
| 79 | /** |
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| 80 | * Constructor. |
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| 81 | * |
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| 82 | * @param string $menu |
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| 83 | * @param Repository $config |
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| 84 | */ |
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| 85 | 10 | public function __construct($menu, Repository $config) |
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| 90 | |||
| 91 | /** |
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| 92 | * Get menu name. |
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| 93 | * |
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| 94 | * @return string |
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| 95 | */ |
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| 96 | 1 | public function getName() |
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| 100 | |||
| 101 | /** |
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| 102 | * Find menu item by given its title. |
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| 103 | * |
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| 104 | * @param string $title |
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| 105 | * @param callable|null $callback |
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| 106 | * @return mixed |
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| 107 | */ |
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| 108 | public function whereTitle($title, callable $callback = null) |
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| 118 | |||
| 119 | /** |
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| 120 | * Find menu item by given key and value. |
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| 121 | * |
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| 122 | * @param string $key |
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| 123 | * @param string $value |
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| 124 | * @return \Nwidart\Menus\MenuItem |
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| 125 | */ |
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| 126 | public function findBy($key, $value) |
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| 132 | |||
| 133 | /** |
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| 134 | * Set view factory instance. |
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| 135 | * |
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| 136 | * @param ViewFactory $views |
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| 137 | * |
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| 138 | * @return $this |
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| 139 | */ |
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| 140 | 9 | public function setViewFactory(ViewFactory $views) |
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| 146 | |||
| 147 | /** |
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| 148 | * Set view. |
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| 149 | * |
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| 150 | * @param string $view |
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| 151 | * |
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| 152 | * @return $this |
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| 153 | */ |
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| 154 | public function setView($view) |
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| 160 | |||
| 161 | /** |
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| 162 | * Set Prefix URL. |
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| 163 | * |
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| 164 | * @param string $prefixUrl |
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| 165 | * |
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| 166 | * @return $this |
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| 167 | */ |
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| 168 | public function setPrefixUrl($prefixUrl) |
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| 174 | |||
| 175 | /** |
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| 176 | * Set styles. |
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| 177 | * |
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| 178 | * @param array $styles |
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| 179 | */ |
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| 180 | public function setStyles(array $styles) |
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| 184 | |||
| 185 | /** |
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| 186 | * Set new presenter class. |
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| 187 | * |
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| 188 | * @param string $presenter |
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| 189 | */ |
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| 190 | public function setPresenter($presenter) |
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| 194 | |||
| 195 | /** |
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| 196 | * Get presenter instance. |
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| 197 | * |
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| 198 | * @return \Nwidart\Menus\Presenters\PresenterInterface |
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| 199 | */ |
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| 200 | 3 | public function getPresenter() |
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| 204 | |||
| 205 | /** |
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| 206 | * Set new presenter class by given style name. |
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| 207 | * |
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| 208 | * @param string $name |
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| 209 | * |
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| 210 | * @return self |
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| 211 | */ |
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| 212 | public function style($name) |
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| 220 | |||
| 221 | /** |
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| 222 | * Determine if the given name in the presenter style. |
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| 223 | * |
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| 224 | * @param $name |
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| 225 | * |
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| 226 | * @return bool |
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| 227 | */ |
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| 228 | 3 | public function hasStyle($name) |
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| 232 | |||
| 233 | /** |
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| 234 | * Get style aliases. |
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| 235 | * |
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| 236 | * @return mixed |
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| 237 | */ |
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| 238 | 3 | public function getStyles() |
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| 242 | |||
| 243 | /** |
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| 244 | * Get the presenter class name by given alias name. |
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| 245 | * |
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| 246 | * @param $name |
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| 247 | * |
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| 248 | * @return mixed |
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| 249 | */ |
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| 250 | public function getStyle($name) |
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| 256 | |||
| 257 | /** |
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| 258 | * Set new presenter class from given alias name. |
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| 259 | * |
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| 260 | * @param $name |
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| 261 | */ |
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| 262 | public function setPresenterFromStyle($name) |
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| 266 | |||
| 267 | /** |
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| 268 | * Set the resolved item bindings |
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| 269 | * |
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| 270 | * @param array $bindings |
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| 271 | * @return $this |
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| 272 | */ |
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| 273 | 3 | public function setBindings(array $bindings) |
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| 279 | |||
| 280 | /** |
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| 281 | * Resolves a key from the bindings array. |
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| 282 | * |
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| 283 | * @param string|array $key |
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| 284 | * @return mixed |
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| 285 | */ |
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| 286 | public function resolve($key) |
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| 304 | |||
| 305 | /** |
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| 306 | * Resolves an array of menu items properties. |
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| 307 | * |
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| 308 | * @param array &$items |
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| 309 | * @return void |
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| 310 | */ |
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| 311 | 3 | protected function resolveItems(array &$items) |
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| 322 | |||
| 323 | /** |
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| 324 | * Add new child menu. |
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| 325 | * |
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| 326 | * @param array $attributes |
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| 327 | * |
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| 328 | * @return \Nwidart\Menus\MenuItem |
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| 329 | */ |
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| 330 | public function add(array $attributes = array()) |
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| 338 | |||
| 339 | /** |
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| 340 | * Create new menu with dropdown. |
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| 341 | * |
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| 342 | * @param $title |
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| 343 | * @param callable $callback |
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| 344 | * @param array $attributes |
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| 345 | * |
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| 346 | * @return $this |
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| 347 | */ |
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| 348 | View Code Duplication | public function dropdown($title, \Closure $callback, $order = null, array $attributes = array()) |
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| 369 | |||
| 370 | /** |
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| 371 | * Register new menu item using registered route. |
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| 372 | * |
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| 373 | * @param $route |
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| 374 | * @param $title |
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| 375 | * @param array $parameters |
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| 376 | * @param array $attributes |
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| 377 | * |
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| 378 | * @return static |
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| 379 | */ |
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| 380 | public function route($route, $title, $parameters = array(), $order = null, $attributes = array()) |
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| 402 | |||
| 403 | /** |
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| 404 | * Format URL. |
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| 405 | * |
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| 406 | * @param string $url |
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| 407 | * |
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| 408 | * @return string |
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| 409 | */ |
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| 410 | 2 | protected function formatUrl($url) |
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| 416 | |||
| 417 | /** |
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| 418 | * Register new menu item using url. |
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| 419 | * |
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| 420 | * @param $url |
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| 421 | * @param $title |
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| 422 | * @param array $attributes |
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| 423 | * |
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| 424 | * @return static |
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| 425 | */ |
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| 426 | 2 | public function url($url, $title, $order = 0, $attributes = array()) |
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| 446 | |||
| 447 | /** |
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| 448 | * Add new divider item. |
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| 449 | * |
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| 450 | * @param int $order |
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| 451 | * @return \Nwidart\Menus\MenuItem |
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| 452 | */ |
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| 453 | public function addDivider($order = null) |
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| 459 | |||
| 460 | /** |
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| 461 | * Add new header item. |
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| 462 | * |
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| 463 | * @return \Nwidart\Menus\MenuItem |
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| 464 | */ |
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| 465 | public function addHeader($title, $order = null) |
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| 475 | |||
| 476 | /** |
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| 477 | * Alias for "addHeader" method. |
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| 478 | * |
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| 479 | * @param string $title |
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| 480 | * |
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| 481 | * @return $this |
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| 482 | */ |
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| 483 | public function header($title) |
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| 487 | |||
| 488 | /** |
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| 489 | * Alias for "addDivider" method. |
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| 490 | * |
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| 491 | * @return $this |
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| 492 | */ |
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| 493 | public function divider() |
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| 497 | |||
| 498 | /** |
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| 499 | * Get items count. |
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| 500 | * |
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| 501 | * @return int |
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| 502 | */ |
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| 503 | 1 | public function count() |
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| 507 | |||
| 508 | /** |
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| 509 | * Empty the current menu items. |
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| 510 | */ |
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| 511 | public function destroy() |
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| 517 | |||
| 518 | /** |
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| 519 | * Render the menu to HTML tag. |
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| 520 | * |
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| 521 | * @param string $presenter |
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| 522 | * |
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| 523 | * @return string |
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| 524 | */ |
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| 525 | 3 | public function render($presenter = null) |
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| 543 | |||
| 544 | /** |
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| 545 | * Render menu via view presenter. |
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| 546 | * |
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| 547 | * @return \Illuminate\View\View |
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| 548 | */ |
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| 549 | public function renderView($presenter = null) |
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| 555 | |||
| 556 | /** |
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| 557 | * Get original items. |
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| 558 | * |
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| 559 | * @return array |
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| 560 | */ |
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| 561 | public function getItems() |
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| 565 | |||
| 566 | /** |
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| 567 | * Get menu items as laravel collection instance. |
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| 568 | * |
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| 569 | * @return \Illuminate\Support\Collection |
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| 570 | */ |
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| 571 | public function toCollection() |
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| 575 | |||
| 576 | /** |
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| 577 | * Get menu items as array. |
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| 578 | * |
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| 579 | * @return array |
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| 580 | */ |
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| 581 | public function toArray() |
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| 585 | |||
| 586 | /** |
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| 587 | * Enable menu ordering. |
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| 588 | * |
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| 589 | * @return self |
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| 590 | */ |
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| 591 | public function enableOrdering() |
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| 597 | |||
| 598 | /** |
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| 599 | * Disable menu ordering. |
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| 600 | * |
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| 601 | * @return self |
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| 602 | */ |
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| 603 | public function disableOrdering() |
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| 609 | |||
| 610 | /** |
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| 611 | * Get menu items and order it by 'order' key. |
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| 612 | * |
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| 613 | * @return array |
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| 614 | */ |
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| 615 | 3 | public function getOrderedItems() |
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| 625 | |||
| 626 | /** |
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| 627 | * Render the menu. |
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| 628 | * |
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| 629 | * @return string |
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| 630 | */ |
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| 631 | 3 | protected function renderMenu() |
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| 656 | } |
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| 657 |
There are different options of fixing this problem.
If you want to be on the safe side, you can add an additional type-check:
If you are sure that the expression is traversable, you might want to add a doc comment cast to improve IDE auto-completion and static analysis:
Mark the issue as a false-positive: Just hover the remove button, in the top-right corner of this issue for more options.