Complex classes like Router 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 Router, and based on these observations, apply Extract Interface, too.
1 | <?php |
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22 | class Router |
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23 | { |
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24 | /** |
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25 | * Holds the controller string. |
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26 | * @var string |
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27 | */ |
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28 | protected $controller = null; |
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29 | |||
30 | /** |
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31 | * Holds the current method. |
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32 | * @var string |
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33 | */ |
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34 | protected $method = null; |
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35 | |||
36 | /** |
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37 | * Holds the current action. |
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38 | * @var string |
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39 | */ |
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40 | protected $action = null; |
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41 | |||
42 | /** |
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43 | * Holds the current action. |
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44 | * @var string |
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45 | */ |
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46 | protected $name = null; |
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47 | |||
48 | /** |
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49 | * Holds all the actions (HTTP methods to CRUD verbs). |
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50 | * TODO: refactor this!! |
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51 | * @var array |
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52 | */ |
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53 | public static $actions = array( |
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54 | 'POST' => 'onCreate', |
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55 | 'GET' => 'onRead', |
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56 | 'PUT' => 'onUpdate', |
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57 | 'DELETE' => 'onDelete', |
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58 | 'PATCH' => 'onModify', |
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59 | 'OPTIONS' => 'onHelp', |
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60 | 'HEAD' => 'onTest', |
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61 | 'TRACE' => 'onTrace' |
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62 | ); |
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63 | |||
64 | /** |
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65 | * Holds an array of router params |
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66 | * @var array |
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67 | */ |
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68 | protected $params = array(); |
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69 | |||
70 | private $_rules = array(); |
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71 | private $_defaults = array(); |
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72 | |||
73 | /** |
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74 | * The constructor, set the default routing rules. |
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75 | * |
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76 | * @param array $rules |
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77 | * @param array $defaults |
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78 | * @throws \InvalidArgumentException |
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79 | */ |
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80 | public function __construct(array $rules=array(), array $defaults=array()) |
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99 | |||
100 | /** |
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101 | * Sets the public properties e.g. controller, action, method and params |
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102 | * in order as per the following: |
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103 | * - router rules, |
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104 | * - router params, |
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105 | * - then router defauls. |
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106 | * |
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107 | * @param string $route |
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108 | * @param array $rules |
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109 | * @param array $params |
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110 | * @return void |
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111 | */ |
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112 | public function setAsProperties(array $rules, array $params) |
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129 | |||
130 | /** |
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131 | * Maps an URI against the routing table. |
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132 | * |
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133 | * @param string $uri |
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134 | * @param array $params Additional params to merge with the current set (optional) |
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135 | * @return void |
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136 | */ |
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137 | public function map($uri, array $params=null) |
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155 | |||
156 | /** |
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157 | * Tries to match a route to an URI params (version with REGEX). |
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158 | * |
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159 | * @param string $route |
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160 | * @param string $uri |
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161 | * @return array |
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162 | */ |
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163 | public function routeToParamsMatcher($route, $uri) |
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201 | |||
202 | /** |
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203 | * Sets the current action from a specified method |
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204 | * or use the method in the current scope. |
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205 | * |
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206 | * @param string $method The method to set the action (optional) |
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207 | * @return void |
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208 | */ |
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209 | public function setAction($method=null) |
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218 | |||
219 | /** |
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220 | * Returns the current action, or as specified. |
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221 | * |
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222 | * @param string $method A method key (optional) |
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223 | * @return string |
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224 | */ |
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225 | public function getAction($method=null) |
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238 | |||
239 | /** |
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240 | * Returns all the actions. |
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241 | * |
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242 | * @return array |
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243 | */ |
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244 | public function getActions() |
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248 | |||
249 | /** |
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250 | * Sets the router's params. |
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251 | * |
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252 | * @param array $params |
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253 | * @return void |
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254 | */ |
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255 | public function setParams(array $params) |
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259 | |||
260 | /** |
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261 | * Returns all the router's params. |
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262 | * |
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263 | * @return array |
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264 | */ |
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265 | public function getParams() |
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269 | |||
270 | /** |
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271 | * Sets the specified router param. |
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272 | * |
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273 | * @param string $key |
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274 | * @param string $value |
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275 | * @return void |
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276 | */ |
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277 | public function setParam($key, $value) |
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281 | |||
282 | /** |
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283 | * Returns the specified router param. |
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284 | * |
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285 | * @param string $key |
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286 | * @return array |
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287 | * @throws \InvalidArgumentException |
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288 | */ |
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289 | public function getParam($key) |
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299 | |||
300 | /** |
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301 | * Checks a specified router param exists. |
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302 | * |
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303 | * @param string $key A key to check |
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304 | * @return bolean |
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305 | */ |
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306 | public function hasParam($key) |
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310 | |||
311 | /** |
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312 | * Sets the controller. |
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313 | * |
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314 | * @param string $controller |
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315 | * @return void |
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316 | */ |
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317 | public function setController($controller) |
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321 | |||
322 | /** |
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323 | * Returns the current controller. |
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324 | * |
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325 | * @return string |
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326 | */ |
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327 | public function getController() |
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331 | |||
332 | /** |
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333 | * Sets the method. |
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334 | * |
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335 | * @param string $method |
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336 | * @return void |
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337 | */ |
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338 | public function setMethod($method) |
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342 | |||
343 | /** |
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344 | * Returns the current method. |
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345 | * |
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346 | * @return string |
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347 | */ |
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348 | public function getMethod() |
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352 | |||
353 | /** |
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354 | * Returns, if set, the current route name. |
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355 | * Alternatively, return the current path in scope. |
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356 | * |
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357 | * @return string|null |
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358 | */ |
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359 | public function getName() |
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363 | |||
364 | /** |
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365 | * Returns, if set, the current route path. |
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366 | * |
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367 | * @return string|null |
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368 | */ |
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369 | public function getPath() |
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373 | |||
374 | /** |
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375 | * Sets the route name. |
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376 | * |
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377 | * @param $name |
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378 | * @return string|null |
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379 | */ |
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380 | public function setName($name) |
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384 | |||
385 | } |
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386 |
This check looks for PHPDoc comments describing methods or function parameters that do not exist on the corresponding method or function.
Consider the following example. The parameter
$italy
is not defined by the methodfinale(...)
.The most likely cause is that the parameter was removed, but the annotation was not.