Complex classes like QueryBuilderTrait 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 QueryBuilderTrait, and based on these observations, apply Extract Interface, too.
1 | <?php |
||
7 | trait QueryBuilderTrait |
||
8 | { |
||
9 | /** |
||
10 | * @var |
||
11 | */ |
||
12 | protected $options = []; |
||
13 | /** |
||
14 | * @var |
||
15 | */ |
||
16 | protected $where = []; |
||
17 | /** |
||
18 | * @var |
||
19 | */ |
||
20 | protected $properties = []; |
||
21 | |||
22 | /** |
||
23 | * Retrieve all Items. |
||
24 | * |
||
25 | * @param array $options |
||
26 | * |
||
27 | * @return array |
||
28 | */ |
||
29 | protected function all($options = []) |
||
33 | |||
34 | /** |
||
35 | * Retrieve single Item. |
||
36 | * |
||
37 | * @param int $id |
||
38 | * @param array $options |
||
39 | * |
||
40 | * @return object |
||
41 | */ |
||
42 | protected function find($id, $options = []) |
||
46 | |||
47 | /** |
||
48 | * Create new Item. |
||
49 | * |
||
50 | * @param array $data |
||
51 | * |
||
52 | * @return object |
||
53 | */ |
||
54 | protected function create($data) |
||
58 | |||
59 | /** |
||
60 | * Update Existing Item. |
||
61 | * |
||
62 | * @param int $id |
||
63 | * @param array $data |
||
64 | * |
||
65 | * @return object |
||
66 | */ |
||
67 | protected function update($id, $data) |
||
71 | |||
72 | /** |
||
73 | * Destroy Item. |
||
74 | * |
||
75 | * @param int $id |
||
76 | * @param array $options |
||
77 | * |
||
78 | * @return object |
||
79 | */ |
||
80 | protected function delete($id, $options = []) |
||
84 | |||
85 | /** |
||
86 | * Batch Update. |
||
87 | * |
||
88 | * @param array $data |
||
89 | * |
||
90 | * @return object |
||
91 | */ |
||
92 | protected function batch($data) |
||
96 | |||
97 | /** |
||
98 | * Retrieve data. |
||
99 | * |
||
100 | * @return array |
||
101 | */ |
||
102 | protected function get() |
||
111 | |||
112 | /** |
||
113 | * Retrieve data. |
||
114 | * |
||
115 | * @return object |
||
116 | */ |
||
117 | protected function first() |
||
121 | |||
122 | /** |
||
123 | * Set options for woocommerce request. |
||
124 | * |
||
125 | * @param array $parameters |
||
126 | * |
||
127 | * @return object $this |
||
128 | */ |
||
129 | protected function options($parameters) |
||
145 | |||
146 | /** |
||
147 | * Join options for woocommerce request. |
||
148 | * |
||
149 | * @param array $parameters |
||
150 | * |
||
151 | * @return object $this |
||
152 | */ |
||
153 | protected function where(...$parameters) |
||
213 | |||
214 | /** |
||
215 | * Set order direction. |
||
216 | * |
||
217 | * @param string $name |
||
218 | * @param string $direction |
||
219 | * |
||
220 | * @return object $this |
||
221 | */ |
||
222 | protected function orderBy($name, $direction = 'desc') |
||
229 | |||
230 | /** |
||
231 | * Paginate results. |
||
232 | * |
||
233 | * @param int $per_page |
||
234 | * @param int $current_page |
||
235 | * |
||
236 | * @return array |
||
237 | */ |
||
238 | protected function paginate($per_page, $current_page = 1) |
||
271 | |||
272 | /** |
||
273 | * Count all results. |
||
274 | * |
||
275 | * @return int |
||
276 | */ |
||
277 | protected function count() |
||
288 | |||
289 | /** |
||
290 | * Store data. |
||
291 | * |
||
292 | * @return array |
||
293 | */ |
||
294 | public function save() |
||
300 | } |
||
301 |
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: