Complex classes like Route 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 Route, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 21 | trait Route { |
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| 22 | /** |
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| 23 | * Current mirror according to configuration |
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| 24 | * |
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| 25 | * @var int |
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| 26 | */ |
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| 27 | public $mirror_index; |
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| 28 | /** |
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| 29 | * Normalized processed representation of relative address, may differ from raw, should be used in most cases |
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| 30 | * |
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| 31 | * @var string |
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| 32 | */ |
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| 33 | public $path_normalized; |
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| 34 | /** |
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| 35 | * Contains parsed route of current page url in form of array without module name and prefixes `admin|api` |
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| 36 | * |
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| 37 | * @var array |
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| 38 | */ |
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| 39 | public $route; |
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| 40 | /** |
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| 41 | * Like `$route` property, but excludes numerical items |
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| 42 | * |
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| 43 | * @var string[] |
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| 44 | */ |
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| 45 | public $route_path; |
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| 46 | /** |
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| 47 | * Like `$route` property, but only includes numerical items (opposite to route_path property) |
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| 48 | * |
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| 49 | * @var int[] |
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| 50 | */ |
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| 51 | public $route_ids; |
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| 52 | /** |
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| 53 | * Request to administration section |
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| 54 | * |
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| 55 | * @var bool |
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| 56 | */ |
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| 57 | public $admin_path; |
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| 58 | /** |
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| 59 | * Request to CLI interface |
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| 60 | * |
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| 61 | * @var bool |
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| 62 | */ |
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| 63 | public $cli_path; |
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| 64 | /** |
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| 65 | * Request to api section |
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| 66 | * |
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| 67 | * @var bool |
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| 68 | */ |
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| 69 | public $api_path; |
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| 70 | /** |
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| 71 | * Current module |
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| 72 | * |
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| 73 | * @var string |
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| 74 | */ |
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| 75 | public $current_module; |
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| 76 | /** |
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| 77 | * Home page |
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| 78 | * |
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| 79 | * @var bool |
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| 80 | */ |
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| 81 | public $home_page; |
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| 82 | /** |
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| 83 | * Initialize route based on system configuration, requires `::init_server()` being called first since uses its data |
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| 84 | * |
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| 85 | * @throws ExitException |
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| 86 | */ |
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| 87 | 8 | function init_route () { |
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| 130 | /** |
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| 131 | * @param Config $Config |
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| 132 | * |
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| 133 | * @return int |
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| 134 | */ |
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| 135 | 8 | protected function determine_current_mirror_index ($Config) { |
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| 151 | /** |
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| 152 | * Process raw relative route. |
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| 153 | * |
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| 154 | * As result returns current route in system in form of array, normalized path, detects module path points to, whether this is API call, administration |
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| 155 | * page, or home page whether this is API call, admin page, or home page |
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| 156 | * |
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| 157 | * @param string $path |
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| 158 | * |
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| 159 | * @return array Array contains next elements: `route`, `path_normalized`, `cli_path`, `admin_path`, `api_path`, `current_module`, `home_page` |
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| 160 | */ |
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| 161 | 8 | function analyze_route_path ($path) { |
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| 211 | /** |
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| 212 | * @param Config $Config |
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| 213 | * @param string $path_normalized |
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| 214 | * |
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| 215 | * @throws ExitException |
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| 216 | */ |
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| 217 | 8 | protected function handle_redirect ($Config, $path_normalized) { |
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| 233 | /** |
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| 234 | * Check whether referer is local |
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| 235 | * |
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| 236 | * @param Config $Config |
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| 237 | * |
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| 238 | * @return bool |
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| 239 | */ |
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| 240 | protected function is_referer_local ($Config) { |
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| 259 | /** |
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| 260 | * Determine module of current page based on page path and system configuration |
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| 261 | * |
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| 262 | * @param array $rc |
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| 263 | * @param bool $home_page |
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| 264 | * @param string $cli_path |
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| 265 | * @param string $admin_path |
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| 266 | * @param string $api_path |
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| 267 | * |
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| 268 | * @return mixed|string |
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| 269 | */ |
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| 270 | 8 | protected function determine_page_module (&$rc, &$home_page, $cli_path, $admin_path, $api_path) { |
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| 294 | /** |
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| 295 | * Get array of modules |
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| 296 | * |
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| 297 | * @param Config $Config |
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| 298 | * @param bool $admin_path |
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| 299 | * |
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| 300 | * @return array |
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| 301 | */ |
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| 302 | 8 | protected function get_modules ($Config, $admin_path) { |
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| 319 | /** |
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| 320 | * Get route part by index |
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| 321 | * |
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| 322 | * @param int $index |
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| 323 | * |
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| 324 | * @return int|null|string |
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| 325 | */ |
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| 326 | function route ($index) { |
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| 329 | /** |
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| 330 | * Get route path part by index |
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| 331 | * |
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| 332 | * @param int $index |
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| 333 | * |
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| 334 | * @return null|string |
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| 335 | */ |
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| 336 | function route_path ($index) { |
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| 339 | /** |
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| 340 | * Get route ids part by index |
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| 341 | * |
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| 342 | * @param int $index |
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| 343 | * |
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| 344 | * @return int|null |
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| 345 | */ |
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| 346 | function route_ids ($index) { |
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| 349 | } |
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| 350 |
This check looks for the generic type
arrayas a return type and suggests a more specific type. This type is inferred from the actual code.