Complex classes like Repository 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 Repository, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 15 | class Repository |
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| 16 | { |
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| 17 | /** @var \Wandu\Database\Manager */ |
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| 18 | protected $manager; |
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| 19 | |||
| 20 | /** @var \Wandu\Database\Contracts\ConnectionInterface */ |
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| 21 | protected $connection; |
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| 22 | |||
| 23 | /** @var \Wandu\Database\Entity\Metadata */ |
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| 24 | protected $meta; |
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| 25 | |||
| 26 | /** @var \Wandu\Database\QueryBuilder */ |
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| 27 | protected $queryBuilder; |
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| 28 | |||
| 29 | /** @var \ReflectionClass */ |
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| 30 | protected $reflClass; |
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| 31 | |||
| 32 | /** @var \ReflectionProperty[] */ |
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| 33 | protected $refProperties = []; |
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| 34 | |||
| 35 | /** |
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| 36 | * Repository constructor. |
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| 37 | * @param \Wandu\Database\Manager $manager |
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| 38 | * @param \Wandu\Database\Entity\Metadata $meta |
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| 39 | */ |
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| 40 | 14 | public function __construct(Manager $manager, Metadata $meta) |
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| 47 | |||
| 48 | /** |
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| 49 | * @return \Wandu\Database\Entity\Metadata |
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| 50 | */ |
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| 51 | public function getMeta(): Metadata |
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| 55 | |||
| 56 | /** |
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| 57 | * @param string|callable|\Wandu\Database\Contracts\QueryInterface $query |
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| 58 | * @param array $bindings |
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| 59 | * @return \Generator |
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| 60 | */ |
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| 61 | 5 | public function fetch($query = null, array $bindings = []) |
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| 67 | |||
| 68 | /** |
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| 69 | * @param string|callable|\Wandu\Database\Contracts\QueryInterface $query |
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| 70 | * @param array $bindings |
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| 71 | * @return object |
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| 72 | */ |
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| 73 | 9 | public function first($query = null, array $bindings = []) |
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| 77 | |||
| 78 | /** |
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| 79 | * @param string|int $identifier |
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| 80 | * @return object |
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| 81 | */ |
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| 82 | public function find($identifier) |
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| 88 | |||
| 89 | /** |
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| 90 | * @param object $entity |
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| 91 | * @return int |
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| 92 | */ |
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| 93 | 1 | public function insert($entity) |
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| 116 | |||
| 117 | /** |
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| 118 | * @param object $entity |
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| 119 | * @return int |
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| 120 | */ |
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| 121 | 1 | public function update($entity) |
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| 137 | |||
| 138 | /** |
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| 139 | * @param object $entity |
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| 140 | * @return int |
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| 141 | */ |
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| 142 | 1 | public function delete($entity) |
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| 155 | |||
| 156 | /** |
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| 157 | * @param string|callable|\Wandu\Database\Contracts\QueryInterface $query |
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| 158 | * @param array $bindings |
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| 159 | * @return int |
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| 160 | */ |
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| 161 | 2 | public function query($query, array $bindings = []) |
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| 165 | |||
| 166 | /** |
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| 167 | * @param array $attributes |
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| 168 | * @return object |
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| 169 | */ |
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| 170 | 13 | public function hydrate(array $attributes = null) |
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| 191 | |||
| 192 | /** |
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| 193 | * @param mixed $entity |
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| 194 | * @return string|int |
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| 195 | */ |
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| 196 | 2 | private function getIdentifier($entity) |
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| 207 | |||
| 208 | /** |
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| 209 | * @param string|callable|\Wandu\Database\Contracts\QueryInterface $query |
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| 210 | * @return string|\Wandu\Database\Contracts\QueryInterface |
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| 211 | */ |
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| 212 | 13 | private function normalizeSelectQuery($query = null) |
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| 226 | |||
| 227 | 2 | private function cast($value, $type) |
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| 243 | |||
| 244 | /** |
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| 245 | * @param \ReflectionProperty $property |
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| 246 | * @param object $object |
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| 247 | * @param mixed $target |
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| 248 | */ |
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| 249 | 14 | private function injectProperty(ReflectionProperty $property, $object, $target) |
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| 254 | |||
| 255 | /** |
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| 256 | * @param \ReflectionProperty $property |
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| 257 | * @param object $object |
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| 258 | * @return mixed |
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| 259 | */ |
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| 260 | 2 | private function pickProperty(ReflectionProperty $property, $object) |
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| 265 | |||
| 266 | /** |
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| 267 | * @param string $name |
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| 268 | * @return \ReflectionProperty |
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| 269 | */ |
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| 270 | 14 | private function getPropertyReflection($name): ReflectionProperty |
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| 277 | |||
| 278 | /** |
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| 279 | * @return \ReflectionClass |
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| 280 | */ |
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| 281 | 14 | private function getClassReflection(): ReflectionClass |
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| 288 | |||
| 289 | /** |
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| 290 | * @param mixed $entity |
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| 291 | * @param string $method |
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| 292 | */ |
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| 293 | 2 | private function assertIsInstance($entity, $method) |
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| 302 | } |
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| 303 |
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: