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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| 15 | class Router implements ContainerInjectableInterface |
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| 16 | { |
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| 17 | use ContainerInjectableTrait; |
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| 18 | |||
| 19 | |||
| 20 | |||
| 21 | /** |
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| 22 | * @var array $routes all the routes. |
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| 23 | * @var array $internalRoutes all internal routes. |
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| 24 | * @var Route $lastRoute last route that was matched and called. |
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| 25 | */ |
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| 26 | private $routes = []; |
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| 27 | private $internalRoutes = []; |
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| 28 | private $lastRoute = null; |
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| 29 | |||
| 30 | |||
| 31 | |||
| 32 | /** |
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| 33 | * @const DEVELOPMENT Verbose with exceptions. |
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| 34 | * @const PRODUCTION Exceptions turns into 500. |
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| 35 | */ |
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| 36 | const DEVELOPMENT = 0; |
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| 37 | const PRODUCTION = 1; |
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| 38 | |||
| 39 | |||
| 40 | |||
| 41 | /** |
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| 42 | * @var integer $mode current mode. |
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| 43 | */ |
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| 44 | private $mode = self::DEVELOPMENT; |
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| 45 | |||
| 46 | |||
| 47 | |||
| 48 | /** |
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| 49 | * Set Router::DEVELOPMENT or Router::PRODUCTION mode. |
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| 50 | * |
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| 51 | * @param integer $mode which mode to set. |
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| 52 | * |
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| 53 | * @return self to enable chaining. |
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| 54 | */ |
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| 55 | 4 | public function setMode($mode) : object |
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| 60 | |||
| 61 | |||
| 62 | |||
| 63 | /** |
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| 64 | * Add routes from an array where the array looks like this: |
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| 65 | * [ |
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| 66 | * "mount" => null|string, // Where to mount the routes |
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| 67 | * "routes" => [ // All routes in this array |
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| 68 | * [ |
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| 69 | * "info" => "Just say hi.", |
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| 70 | * "method" => null, |
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| 71 | * "path" => "hi", |
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| 72 | * "handler" => function () { |
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| 73 | * return "Hi."; |
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| 74 | * }, |
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| 75 | * ] |
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| 76 | * ] |
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| 77 | * ] |
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| 78 | * |
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| 79 | * @throws ConfigurationException |
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| 80 | * |
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| 81 | * @param array $routes containing the routes to add. |
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| 82 | * |
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| 83 | * @return self to enable chaining. |
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| 84 | */ |
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| 85 | 23 | public function addRoutes(array $routes) : object |
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| 117 | |||
| 118 | |||
| 119 | |||
| 120 | /** |
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| 121 | * Prepare the mount string from configuration, use $mount1 or $mount2, |
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| 122 | * the latter supersedes the first. |
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| 123 | * |
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| 124 | * @param string $mount1 first suggestion to mount path. |
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| 125 | * @param string $mount2 second suggestion to mount path, ovverides |
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| 126 | * the first. |
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| 127 | * |
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| 128 | * @return string|null as mount path. |
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| 129 | */ |
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| 130 | 16 | private function createMountPath( |
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| 154 | |||
| 155 | |||
| 156 | |||
| 157 | /** |
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| 158 | * Add a route with a request method, a path rule to match and an action |
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| 159 | * as the callback. Adding several path rules (array) results in several |
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| 160 | * routes being created. |
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| 161 | * |
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| 162 | * @param string|array $method as request method to support |
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| 163 | * @param string $mount prefix to $path |
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| 164 | * @param string|array $path for this route, array for several |
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| 165 | * paths |
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| 166 | * @param string|array|callable $handler for this path, callable or equal |
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| 167 | * @param string $info description of the route |
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| 168 | * |
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| 169 | * @return void. |
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| 170 | */ |
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| 171 | 107 | public function addRoute( |
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| 188 | |||
| 189 | |||
| 190 | |||
| 191 | /** |
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| 192 | * Add an internal route to the router, this route is not exposed to the |
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| 193 | * browser and the end user. |
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| 194 | * |
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| 195 | * @param string $path for this route |
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| 196 | * @param string|array|callable $handler for this path, callable or equal |
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| 197 | * @param string $info description of the route |
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| 198 | * |
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| 199 | * @return void. |
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| 200 | */ |
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| 201 | 23 | public function addInternalRoute( |
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| 210 | |||
| 211 | |||
| 212 | |||
| 213 | /** |
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| 214 | * Handle the routes and match them towards the request, dispatch them |
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| 215 | * when a match is made. Each route handler may throw exceptions that |
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| 216 | * may redirect to an internal route for error handling. |
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| 217 | * Several routes can match and if the routehandler does not break |
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| 218 | * execution flow, the route matching will carry on. |
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| 219 | * Only the last routehandler will get its return value returned further. |
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| 220 | * |
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| 221 | * @param string $path the path to find a matching handler for. |
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| 222 | * @param string $method the request method to match. |
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| 223 | * |
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| 224 | * @return mixed content returned from route. |
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| 225 | */ |
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| 226 | 108 | public function handle($path, $method = null) |
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| 255 | |||
| 256 | |||
| 257 | |||
| 258 | /** |
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| 259 | * Handle an internal route, the internal routes are not exposed to the |
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| 260 | * end user. |
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| 261 | * |
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| 262 | * @param string $path for this route. |
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| 263 | * |
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| 264 | * @throws \Anax\Route\Exception\NotFoundException |
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| 265 | * |
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| 266 | * @return void |
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| 267 | */ |
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| 268 | 23 | public function handleInternal($path) |
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| 282 | |||
| 283 | |||
| 284 | |||
| 285 | /** |
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| 286 | * Add a route having a controller as a handler. |
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| 287 | * |
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| 288 | * @param string|array $method as request method to support |
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| 289 | * @param string|array $mount for this route. |
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| 290 | * @param string|callable $handler a callback handler for the route. |
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| 291 | * @param string $info description of the route |
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| 292 | * |
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| 293 | * @return void. |
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| 294 | */ |
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| 295 | 6 | public function addController($method = null, $mount = null, $handler = null, $info = null) |
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| 299 | |||
| 300 | |||
| 301 | |||
| 302 | /** |
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| 303 | * Add a route to the router by its method(s), path(s) and a callback. |
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| 304 | * |
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| 305 | * @param string|array $method as request method to support |
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| 306 | * @param string|array $path for this route. |
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| 307 | * @param string|callable $handler a callback handler for the route. |
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| 308 | * @param string $info description of the route |
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| 309 | * |
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| 310 | * @return void. |
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| 311 | */ |
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| 312 | 12 | public function any($method = null, $path = null, $handler = null, $info = null) |
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| 316 | |||
| 317 | |||
| 318 | |||
| 319 | /** |
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| 320 | * Add a route to the router by its path(s) and a callback for any |
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| 321 | * request method . |
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| 322 | * |
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| 323 | * @param string|array $path for this route. |
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| 324 | * @param string|callable $handler a callback handler for the route. |
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| 325 | * @param string $info description of the route |
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| 326 | * |
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| 327 | * @return void |
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| 328 | */ |
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| 329 | 21 | public function add($path = null, $handler = null, $info = null) |
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| 333 | |||
| 334 | |||
| 335 | |||
| 336 | /** |
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| 337 | * Add a default route which will be applied for any path and any |
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| 338 | * request method. |
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| 339 | * |
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| 340 | * @param string|callable $handler a callback handler for the route. |
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| 341 | * @param string $info description of the route |
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| 342 | * |
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| 343 | * @return void |
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| 344 | */ |
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| 345 | 48 | public function always($handler, $info = null) |
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| 349 | |||
| 350 | |||
| 351 | |||
| 352 | /** |
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| 353 | * Add a default route which will be applied for any path, if the choosen |
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| 354 | * request method is matching. |
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| 355 | * |
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| 356 | * @param string|array $method as request method to support |
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| 357 | * @param string|callable $handler a callback handler for the route. |
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| 358 | * @param string $info description of the route |
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| 359 | * |
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| 360 | * @return void |
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| 361 | */ |
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| 362 | 7 | public function all($method, $handler, $info = null) |
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| 366 | |||
| 367 | |||
| 368 | |||
| 369 | /** |
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| 370 | * Shortcut to add a GET route for the http request method GET. |
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| 371 | * |
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| 372 | * @param string|array $path for this route. |
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| 373 | * @param string|callable $handler a callback handler for the route. |
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| 374 | * @param string $info description of the route |
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| 375 | * |
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| 376 | * @return void |
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| 377 | */ |
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| 378 | 6 | public function get($path, $handler, $info = null) |
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| 382 | |||
| 383 | |||
| 384 | |||
| 385 | /** |
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| 386 | * Shortcut to add a POST route for the http request method POST. |
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| 387 | * |
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| 388 | * @param string|array $path for this route. |
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| 389 | * @param string|callable $handler a callback handler for the route. |
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| 390 | * @param string $info description of the route |
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| 391 | * |
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| 392 | * @return void |
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| 393 | */ |
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| 394 | 6 | public function post($path, $handler, $info = null) |
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| 398 | |||
| 399 | |||
| 400 | |||
| 401 | /** |
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| 402 | * Shortcut to add a PUT route for the http request method PUT. |
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| 403 | * |
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| 404 | * @param string|array $path for this route. |
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| 405 | * @param string|callable $handler a callback handler for the route. |
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| 406 | * @param string $info description of the route |
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| 407 | * |
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| 408 | * @return void |
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| 409 | */ |
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| 410 | 6 | public function put($path, $handler, $info = null) |
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| 414 | |||
| 415 | |||
| 416 | |||
| 417 | /** |
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| 418 | * Shortcut to add a PATCH route for the http request method PATCH. |
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| 419 | * |
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| 420 | * @param string|array $path for this route. |
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| 421 | * @param string|callable $handler a callback handler for the route. |
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| 422 | * @param string $info description of the route |
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| 423 | * |
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| 424 | * @return void |
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| 425 | */ |
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| 426 | 6 | public function patch($path, $handler, $info = null) |
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| 430 | |||
| 431 | |||
| 432 | |||
| 433 | /** |
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| 434 | * Shortcut to add a DELETE route for the http request method DELETE. |
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| 435 | * |
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| 436 | * @param string|array $path for this route. |
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| 437 | * @param string|callable $handler a callback handler for the route. |
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| 438 | * @param string $info description of the route |
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| 439 | * |
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| 440 | * @return void |
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| 441 | */ |
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| 442 | 6 | public function delete($path, $handler, $info = null) |
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| 446 | |||
| 447 | |||
| 448 | |||
| 449 | /** |
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| 450 | * Shortcut to add a OPTIONS route for the http request method OPTIONS. |
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| 451 | * |
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| 452 | * @param string|array $path for this route. |
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| 453 | * @param string|callable $handler a callback handler for the route. |
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| 454 | * @param string $info description of the route |
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| 455 | * |
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| 456 | * @return void |
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| 457 | */ |
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| 458 | 6 | public function options($path, $handler, $info = null) |
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| 462 | |||
| 463 | |||
| 464 | |||
| 465 | /** |
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| 466 | * Get the route for the last route that was handled. |
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| 467 | * |
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| 468 | * @return mixed |
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| 469 | */ |
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| 470 | 4 | public function getLastRoute() |
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| 474 | |||
| 475 | |||
| 476 | |||
| 477 | /** |
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| 478 | * Get the route for the last route that was handled. |
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| 479 | * |
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| 480 | * @return mixed |
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| 481 | */ |
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| 482 | 3 | public function getMatchedPath() |
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| 486 | |||
| 487 | |||
| 488 | |||
| 489 | /** |
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| 490 | * Get all routes. |
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| 491 | * |
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| 492 | * @return array with all routes. |
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| 493 | */ |
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| 494 | 79 | public function getAll() |
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| 498 | |||
| 499 | |||
| 500 | |||
| 501 | /** |
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| 502 | * Get all internal routes. |
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| 503 | * |
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| 504 | * @return array with internal routes. |
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| 505 | */ |
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| 506 | 5 | public function getInternal() |
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| 510 | } |
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| 511 |
In PHP, under loose comparison (like
==, or!=, orswitchconditions), values of different types might be equal.For
stringvalues, the empty string''is a special case, in particular the following results might be unexpected: