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 JqueryAjaxTrait 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 JqueryAjaxTrait, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 8 | trait JqueryAjaxTrait { |
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| 9 | |||
| 10 | protected $ajaxLoader='<span></span><span></span><span></span><span></span><span></span>'; |
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| 11 | |||
| 12 | public abstract function _prep_value($value); |
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| 25 | |||
| 26 | public function _get($url, $params="{}", $responseElement="", $jsCallback=NULL, $attr="id", $hasLoader=true,$immediatly=false) { |
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| 32 | |||
| 33 | protected function _ajax($method,$url, $params="{}", $responseElement="", $jsCallback=NULL, $attr="id", $hasLoader=true,$immediatly=false) { |
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| 48 | |||
| 49 | protected function _getAjaxUrl($url,$attr){ |
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| 63 | |||
| 64 | protected function _getOnAjaxDone($responseElement,$jsCallback){ |
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| 72 | |||
| 73 | protected function _getResponseElement($responseElement){ |
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| 79 | |||
| 80 | protected function _correctAjaxUrl($url) { |
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| 88 | |||
| 89 | /** |
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| 90 | * Makes an ajax request and receives the JSON data types by assigning DOM elements with the same name |
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| 91 | * @param string $url the request address |
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| 92 | * @param string $params Paramètres passés au format JSON |
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| 93 | * @param string $method Method use |
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| 94 | * @param string $jsCallback javascript code to execute after the request |
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| 95 | * @param boolean $immediatly |
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| 96 | */ |
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| 97 | public function _json($url, $method="get", $params="{}", $jsCallback=NULL, $attr="id", $context="document",$immediatly=false) { |
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| 110 | |||
| 111 | /** |
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| 112 | * Makes an ajax request and receives the JSON data types by assigning DOM elements with the same name when $event fired on $element |
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| 113 | * @param string $element |
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| 114 | * @param string $event |
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| 115 | * @param string $url the request address |
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| 116 | * @param array $parameters default : array("preventDefault"=>true,"stopPropagation"=>true,"jsCallback"=>NULL,"attr"=>"id","params"=>"{}","method"=>"get","immediatly"=>true) |
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| 117 | */ |
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| 118 | View Code Duplication | public function _jsonOn($event,$element, $url,$parameters=array()) { |
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| 130 | |||
| 131 | /** |
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| 132 | * Makes an ajax request and receives a JSON array data types by copying and assigning them to the DOM elements with the same name |
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| 133 | * @param string $url the request address |
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| 134 | * @param string $params Paramètres passés au format JSON |
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| 135 | * @param string $method Method use |
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| 136 | * @param string $jsCallback javascript code to execute after the request |
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| 137 | * @param string $context jquery DOM element, array container. |
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| 138 | * @param boolean $immediatly |
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| 139 | */ |
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| 140 | public function _jsonArray($maskSelector, $url, $method="get", $params="{}", $jsCallback=NULL, $attr="id", $context=null,$immediatly=false) { |
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| 160 | /** |
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| 161 | * Makes an ajax request and receives the JSON data types by assigning DOM elements with the same name when $event fired on $element |
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| 162 | * @param string $element |
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| 163 | * @param string $event |
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| 164 | * @param string $url the request address |
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| 165 | * @param array $parameters default : array("preventDefault"=>true,"stopPropagation"=>true,"jsCallback"=>NULL,"attr"=>"id","params"=>"{}","method"=>"get", "context"=>null) |
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| 166 | */ |
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| 167 | View Code Duplication | public function _jsonArrayOn($event,$element, $maskSelector,$url,$parameters=array()) { |
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| 179 | |||
| 180 | public function _postForm($url, $form, $responseElement, $validation=false, $jsCallback=NULL, $attr="id", $hasLoader=true,$immediatly=false) { |
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| 202 | |||
| 203 | /** |
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| 204 | * Effectue un get vers $url sur l'évènement $event de $element en passant les paramètres $params |
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| 205 | * puis affiche le résultat dans $responseElement |
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| 206 | * @param string $element |
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| 207 | * @param string $event |
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| 208 | * @param string $url |
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| 209 | * @param string $params queryString parameters (JSON format). default : {} |
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| 210 | * @param string $responseElement |
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| 211 | * @param array $parameters default : array("preventDefault"=>true,"stopPropagation"=>true,"jsCallback"=>NULL,"attr"=>"id","hasLoader"=>true) |
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| 212 | */ |
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| 213 | View Code Duplication | public function _getOn($event,$element, $url, $params="{}", $responseElement="", $parameters=array()) { |
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| 223 | |||
| 224 | /** |
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| 225 | * Effectue un post vers $url sur l'évènement $event de $element en passant les paramètres $params |
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| 226 | * puis affiche le résultat dans $responseElement |
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| 227 | * @param string $element |
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| 228 | * @param string $event |
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| 229 | * @param string $url |
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| 230 | * @param string $params queryString parameters (JSON format). default : {} |
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| 231 | * @param string $responseElement |
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| 232 | * @param array $parameters default : array("preventDefault"=>true,"stopPropagation"=>true,"jsCallback"=>NULL,"attr"=>"id","hasLoader"=>true) |
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| 233 | */ |
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| 234 | View Code Duplication | public function _postOn($event,$element, $url, $params="{}", $responseElement="", $parameters=array()) { |
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| 244 | |||
| 245 | /** |
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| 246 | * Effectue un post vers $url sur l'évènement $event de $element en passant les paramètres du formulaire $form |
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| 247 | * puis affiche le résultat dans $responseElement |
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| 248 | * @param string $element |
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| 249 | * @param string $event |
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| 250 | * @param string $url |
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| 251 | * @param string $form |
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| 252 | * @param string $responseElement |
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| 253 | * @param array $parameters default : array("preventDefault"=>true,"stopPropagation"=>true,"validation"=>false,"jsCallback"=>NULL,"attr"=>"id","hasLoader"=>true,"immediatly"=>true) |
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| 254 | */ |
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| 255 | View Code Duplication | public function _postFormOn($event,$element, $url, $form, $responseElement="", $parameters=array()) { |
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| 266 | } |
In PHP it is possible to write to properties without declaring them. For example, the following is perfectly valid PHP code:
Generally, it is a good practice to explictly declare properties to avoid accidental typos and provide IDE auto-completion: