Complex classes like Pagination 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 Pagination, and based on these observations, apply Extract Interface, too.
1 | <?php |
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4 | class Pagination |
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5 | { |
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6 | public static $current; |
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7 | protected $queryString; |
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8 | |||
9 | protected static $page; |
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10 | protected static $pageURL; |
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11 | protected static $lastpage; |
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12 | protected static $totalPages; |
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13 | |||
14 | public $pagerClass = 'pagination justify-content-center'; |
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15 | public $liClass = 'page-item'; |
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16 | public $liActiveClass = 'active'; |
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17 | public $aClass = 'page-link'; |
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18 | public $aActiveClass = ''; |
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19 | |||
20 | /** |
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21 | * Sets the class assigned to the UL element of the pagination object |
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22 | * @param string $class This should be the class or classes that you wish to give to the pagination object |
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23 | * @return $this |
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24 | */ |
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25 | 2 | public function setPaginationClass($class) |
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32 | |||
33 | /** |
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34 | * Returns the class to give to the pagination object |
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35 | * @return string The pagination class will be returned |
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36 | */ |
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37 | 4 | public function getPaginationClass() |
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41 | |||
42 | /** |
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43 | * Sets the default li class |
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44 | * @param string $class This should be the class that you want to all to all li elements |
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45 | * @return $this |
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46 | */ |
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47 | 1 | public function setLiClass($class) |
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52 | |||
53 | /** |
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54 | * Gets the current li class |
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55 | * @return string This should be the class to assign on li elements |
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56 | */ |
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57 | 3 | public function getLiClass() |
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61 | |||
62 | /** |
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63 | * Sets the active class to assign on the li elements |
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64 | * @param string $class This should be the class to assign on active elements |
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65 | * @return $this |
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66 | */ |
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67 | 1 | public function setLiActiveClass($class) |
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72 | |||
73 | /** |
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74 | * Returns the class to assign to active li elements |
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75 | * @return string This should be the class to assign on active elements |
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76 | */ |
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77 | 4 | public function getLiActiveClass() |
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81 | |||
82 | |||
83 | /** |
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84 | * Sets the default class on a elements |
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85 | * @param string $class This should be the class to add to a elements |
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86 | * @return $this |
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87 | */ |
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88 | 1 | public function setAClass($class) |
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93 | |||
94 | /** |
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95 | * Returns the class assigned to a elements |
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96 | * @return string Returns the class assigned to a elements |
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97 | */ |
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98 | 3 | public function getAClass() |
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102 | |||
103 | /** |
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104 | * Sets the class to assign to active a elements |
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105 | * @param string $class This should be the class to add to active a elements |
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106 | * @return $this |
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107 | */ |
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108 | 1 | public function setAActiveClass($class) |
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113 | |||
114 | /** |
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115 | * Returns the class assigned to active a elements |
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116 | * @return string This should be the class to add to active a elements |
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117 | */ |
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118 | 3 | public function getAActiveClass() |
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122 | |||
123 | /** |
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124 | * Returns paging buttons for the number of records |
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125 | * @param int $records The total number of records |
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126 | * @param string $pageURL The URL of the page you are creating the paging for |
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127 | * @param int $start The start number for the results |
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128 | * @param int $maxshown The number of records that are shown on each page |
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129 | * @param int $numpagesshown The number of pagination buttons to display |
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130 | * @param boolean $arrows If you want arrows to display before and after for next and previous set to true (default) else set to false |
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131 | * @param array $additional Any additional get values to include in the URL |
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132 | * @return string|false Returns the pagination menu if required else will return false |
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133 | */ |
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134 | 4 | public function paging($records, $pageURL, $start = 0, $maxshown = 50, $numpagesshown = 11, $arrows = true, $additional = array()) |
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153 | |||
154 | /** |
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155 | * Build a link item with the given values |
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156 | * @param string $link This should be any additional items to be included as part of the link |
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157 | * @param mixed $page This should be the link test on the link normally set as numbers but may be anything like arrows or dots etc |
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158 | * @param boolean $current If this is the current link item set this as true so the class is added to the link item |
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159 | * @return string This will return the paging item as a string |
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160 | */ |
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161 | 3 | protected function buildLink($link, $page, $current = false) |
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165 | |||
166 | /** |
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167 | * Builds the query string to add to the URL |
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168 | * @param mixed $page If the page variable is set to a number will add the page number to the query string else will not add any additional items |
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169 | * @return string The complete string will be returned to add to the link item |
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170 | */ |
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171 | 3 | protected function buildQueryString($page) |
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176 | |||
177 | /** |
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178 | * Gets the current page |
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179 | * @param int $records The total number of records |
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180 | * @param int $maxshown The number of records that are shown on each page |
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181 | * @param int $numpages The number of pagination buttons to display |
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182 | * return void Nothing is returned |
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183 | */ |
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184 | 3 | protected function getPage($records, $maxshown, $numpages) |
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198 | |||
199 | /** |
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200 | * Returns the previous arrows as long as arrows is set to true and the page is not the first page |
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201 | * @param boolean $arrows If you want to display previous arrows set to true else set to false |
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202 | * @return string Any previous link arrows will be returned as a string |
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203 | */ |
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204 | 3 | protected function preLinks($arrows = true) |
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215 | |||
216 | /** |
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217 | * Returns the next arrows as long as arrows is set to true and the page is not the last page |
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218 | * @param boolean $arrows If you want to display next arrows set to true else set to false |
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219 | * @return string Any next link arrows will be returned as a string |
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220 | */ |
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221 | 3 | protected function postLinks($arrows = true) |
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232 | } |
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233 |