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 CliMenuBuilder 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 CliMenuBuilder, and based on these observations, apply Extract Interface, too.
1 | <?php |
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23 | class CliMenuBuilder |
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24 | { |
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25 | /** |
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26 | * @var bool |
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27 | */ |
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28 | private $isBuilt = false; |
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29 | |||
30 | /** |
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31 | * @var null|self |
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32 | */ |
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33 | private $parent; |
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34 | |||
35 | /** |
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36 | * @var self[] |
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37 | */ |
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38 | private $subMenuBuilders = []; |
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39 | |||
40 | /** |
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41 | * @var CliMenu[] |
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42 | */ |
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43 | private $subMenus = []; |
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44 | |||
45 | /** |
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46 | * @var string |
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47 | */ |
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48 | private $goBackButtonText = 'Go Back'; |
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49 | |||
50 | /** |
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51 | * @var string |
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52 | */ |
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53 | private $exitButtonText = 'Exit'; |
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54 | |||
55 | /** |
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56 | * @var array |
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57 | */ |
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58 | private $menuItems = []; |
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59 | |||
60 | /** |
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61 | * @var array |
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62 | */ |
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63 | private $style; |
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64 | |||
65 | /** |
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66 | * @var Terminal |
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67 | */ |
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68 | private $terminal; |
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69 | |||
70 | /** |
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71 | * @var string |
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72 | */ |
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73 | private $menuTitle = null; |
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74 | |||
75 | /** |
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76 | * @var bool |
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77 | */ |
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78 | private $disableDefaultItems = false; |
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79 | |||
80 | /** |
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81 | * @var bool |
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82 | */ |
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83 | private $disabled = false; |
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84 | |||
85 | public function __construct(CliMenuBuilder $parent = null) |
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93 | |||
94 | public function setTitle(string $title) : self |
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100 | |||
101 | public function addMenuItem(MenuItemInterface $item) : self |
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107 | |||
108 | public function addItem( |
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118 | |||
119 | public function addItems(array $items) : self |
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127 | |||
128 | public function addStaticItem(string $text) : self |
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134 | |||
135 | public function addLineBreak(string $breakChar = ' ', int $lines = 1) : self |
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141 | |||
142 | public function addAsciiArt(string $art, string $position = AsciiArtItem::POSITION_CENTER, string $alt = '') : self |
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148 | |||
149 | /** |
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150 | * Add a submenu with a string identifier |
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151 | */ |
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152 | public function addSubMenu(string $id, CliMenuBuilder $subMenuBuilder = null) : CliMenuBuilder |
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164 | |||
165 | /** |
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166 | * Add a split item |
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167 | */ |
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168 | public function addSplitItem() : SplitItem |
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175 | |||
176 | /** |
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177 | * Disable a submenu |
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178 | * |
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179 | * @throws \InvalidArgumentException |
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180 | */ |
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181 | public function disableMenu() : self |
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193 | |||
194 | public function isMenuDisabled() : bool |
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198 | |||
199 | public function setGoBackButtonText(string $goBackButtonTest) : self |
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205 | |||
206 | public function setExitButtonText(string $exitButtonText) : self |
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212 | |||
213 | public function setBackgroundColour(string $colour, string $fallback = null) : self |
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223 | |||
224 | View Code Duplication | public function setForegroundColour(string $colour, string $fallback = null) : self |
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234 | |||
235 | public function setWidth(int $width) : self |
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241 | |||
242 | View Code Duplication | public function setPadding(int $topBottom, int $leftRight = null) : self |
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253 | |||
254 | public function setPaddingTopBottom(int $topBottom) : self |
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260 | |||
261 | public function setPaddingLeftRight(int $leftRight) : self |
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267 | |||
268 | public function setMarginAuto() : self |
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274 | |||
275 | public function setMargin(int $margin) : self |
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282 | |||
283 | public function setUnselectedMarker(string $marker) : self |
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289 | |||
290 | public function setSelectedMarker(string $marker) : self |
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296 | |||
297 | public function setItemExtra(string $extra) : self |
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303 | |||
304 | public function setTitleSeparator(string $separator) : self |
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310 | |||
311 | public function setBorder( |
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343 | |||
344 | public function setTerminal(Terminal $terminal) : self |
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349 | |||
350 | public function getTerminal() : Terminal |
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354 | |||
355 | private function getDefaultItems() : array |
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365 | |||
366 | public function disableDefaultItems() : self |
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372 | |||
373 | private function itemsHaveExtra(array $items) : bool |
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379 | |||
380 | /** |
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381 | * Recursively drop back to the parents menu style |
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382 | * when the current menu has a parent and has no changes |
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383 | */ |
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384 | private function getMenuStyle() : MenuStyle |
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396 | |||
397 | private function buildStyle() : MenuStyle |
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420 | |||
421 | /** |
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422 | * Return to parent builder |
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423 | * |
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424 | * @throws RuntimeException |
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425 | */ |
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426 | public function end() : CliMenuBuilder |
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434 | |||
435 | /** |
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436 | * @throws RuntimeException |
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437 | */ |
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438 | public function getSubMenu(string $id) : CliMenu |
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446 | |||
447 | private function buildSubMenus(array $items) : array |
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460 | |||
461 | public function build() : CliMenu |
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486 | } |
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487 |
This check looks for function calls that miss required arguments.