Duplicate code is one of the most pungent code smells. A rule that is often used is to re-structure code once it is duplicated in three or more places.
Common duplication problems, and corresponding solutions are:
Complex classes like admin_controller 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 admin_controller, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 16 | class admin_controller |
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| 17 | { |
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| 18 | const MAX_NAME_LENGTH = 255; |
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| 19 | const DATE_FORMAT = 'Y-m-d'; |
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| 20 | |||
| 21 | /** @var \phpbb\template\template */ |
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| 22 | protected $template; |
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| 23 | |||
| 24 | /** @var \phpbb\user */ |
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| 25 | protected $user; |
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| 26 | |||
| 27 | /** @var \phpbb\request\request */ |
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| 28 | protected $request; |
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| 29 | |||
| 30 | /** @var \phpbb\ads\ad\manager */ |
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| 31 | protected $manager; |
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| 32 | |||
| 33 | /** @var \phpbb\ads\location\manager */ |
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| 34 | protected $location_manager; |
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| 35 | |||
| 36 | /** @var \phpbb\log\log */ |
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| 37 | protected $log; |
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| 38 | |||
| 39 | /** @var \phpbb\config\db_text */ |
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| 40 | protected $config_text; |
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| 41 | |||
| 42 | /** @var \phpbb\config\config */ |
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| 43 | protected $config; |
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| 44 | |||
| 45 | /** @var string php_ext */ |
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| 46 | protected $php_ext; |
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| 47 | |||
| 48 | /** @var string ext_path */ |
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| 49 | protected $ext_path; |
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| 50 | |||
| 51 | /** @var string Custom form action */ |
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| 52 | protected $u_action; |
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| 53 | |||
| 54 | /** @var array Form validation errors */ |
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| 55 | protected $errors = array(); |
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| 56 | |||
| 57 | /** |
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| 58 | * Constructor |
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| 59 | * |
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| 60 | * @param \phpbb\template\template $template Template object |
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| 61 | * @param \phpbb\user $user User object |
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| 62 | * @param \phpbb\request\request $request Request object |
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| 63 | * @param \phpbb\ads\ad\manager $manager Advertisement manager object |
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| 64 | * @param \phpbb\ads\location\manager $location_manager Template location manager object |
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| 65 | * @param \phpbb\log\log $log The phpBB log system |
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| 66 | * @param \phpbb\config\db_text $config_text Config text object |
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| 67 | * @param \phpbb\config\config $config Config object |
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| 68 | * @param string $php_ext PHP extension |
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| 69 | * @param string $ext_path Path to this extension |
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| 70 | */ |
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| 71 | 34 | public function __construct(\phpbb\template\template $template, \phpbb\user $user, \phpbb\request\request $request, \phpbb\ads\ad\manager $manager, \phpbb\ads\location\manager $location_manager, \phpbb\log\log $log, \phpbb\config\db_text $config_text, \phpbb\config\config $config, $php_ext, $ext_path) |
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| 84 | |||
| 85 | /** |
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| 86 | * Process user request for manage mode |
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| 87 | * |
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| 88 | * @return void |
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| 89 | */ |
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| 90 | 6 | public function mode_manage() |
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| 104 | |||
| 105 | /** |
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| 106 | * Process user request for settings mode |
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| 107 | * |
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| 108 | * @return void |
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| 109 | */ |
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| 110 | 3 | public function mode_settings() |
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| 155 | |||
| 156 | /** |
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| 157 | * Set page url |
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| 158 | * |
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| 159 | * @param string $u_action Custom form action |
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| 160 | * @return void |
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| 161 | */ |
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| 162 | 28 | public function set_page_url($u_action) |
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| 166 | |||
| 167 | /** |
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| 168 | * Get ACP page title for Ads module |
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| 169 | * |
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| 170 | * @return string Language string for Ads ACP module |
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| 171 | */ |
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| 172 | 1 | public function get_page_title() |
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| 176 | |||
| 177 | /** |
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| 178 | * Add an advertisement |
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| 179 | * |
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| 180 | * @return void |
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| 181 | */ |
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| 182 | 11 | public function action_add() |
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| 222 | |||
| 223 | /** |
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| 224 | * Edit an advertisement |
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| 225 | * |
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| 226 | * @return void |
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| 227 | */ |
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| 228 | 9 | public function action_edit() |
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| 284 | |||
| 285 | /** |
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| 286 | * Enable an advertisement |
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| 287 | * |
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| 288 | * @return void |
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| 289 | */ |
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| 290 | 3 | public function action_enable() |
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| 294 | |||
| 295 | /** |
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| 296 | * Disable an advertisement |
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| 297 | * |
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| 298 | * @return void |
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| 299 | */ |
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| 300 | 3 | public function action_disable() |
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| 304 | |||
| 305 | /** |
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| 306 | * Delete an advertisement |
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| 307 | * |
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| 308 | * @return void |
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| 309 | */ |
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| 310 | 3 | public function action_delete() |
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| 350 | |||
| 351 | /** |
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| 352 | * Display the ads |
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| 353 | * |
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| 354 | * @return void |
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| 355 | */ |
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| 356 | 1 | public function list_ads() |
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| 383 | |||
| 384 | /** |
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| 385 | * Perform general tasks |
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| 386 | * |
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| 387 | * @return void |
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| 388 | */ |
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| 389 | 9 | protected function setup() |
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| 395 | |||
| 396 | /** |
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| 397 | * Enable/disable an advertisement |
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| 398 | * |
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| 399 | * @param bool $enable Enable or disable the advertisement? |
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| 400 | * @return void |
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| 401 | */ |
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| 402 | 4 | protected function ad_enable($enable) |
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| 430 | |||
| 431 | /** |
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| 432 | * Get admin form data. |
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| 433 | * |
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| 434 | * @param string $form_name The form name. |
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| 435 | * @return array Form data |
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| 436 | */ |
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| 437 | 13 | protected function get_form_data($form_name) |
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| 485 | |||
| 486 | /** |
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| 487 | * Assign form data to the template. |
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| 488 | * |
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| 489 | * @param array $data The form data. |
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| 490 | * @return void |
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| 491 | */ |
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| 492 | 11 | protected function assign_form_data($data) |
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| 505 | |||
| 506 | /** |
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| 507 | * Prepare end date for display |
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| 508 | * |
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| 509 | * @param mixed $end_date End date. |
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| 510 | * @return string End date prepared for display. |
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| 511 | */ |
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| 512 | 11 | protected function prepare_end_date($end_date) |
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| 526 | |||
| 527 | /** |
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| 528 | * Assign template locations data to the template. |
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| 529 | * |
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| 530 | * @param mixed $data The form data or nothing. |
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| 531 | * @return void |
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| 532 | */ |
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| 533 | 12 | protected function assign_locations($data = false) |
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| 545 | |||
| 546 | /** |
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| 547 | * Prepare advertisement preview |
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| 548 | * |
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| 549 | * @param string $code Ad code to preview |
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| 550 | * @return void |
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| 551 | */ |
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| 552 | 2 | protected function ad_preview($code) |
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| 556 | |||
| 557 | /** |
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| 558 | * Print success message. |
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| 559 | * |
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| 560 | * It takes arguments in the form of a language key, followed by language substitution values. |
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| 561 | */ |
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| 562 | 6 | protected function success() |
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| 566 | |||
| 567 | /** |
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| 568 | * Print error message. |
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| 569 | * |
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| 570 | * It takes arguments in the form of a language key, followed by language substitution values. |
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| 571 | */ |
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| 572 | 5 | protected function error() |
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| 576 | |||
| 577 | /** |
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| 578 | * Log action |
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| 579 | * |
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| 580 | * @param string $action Performed action in uppercase |
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| 581 | * @param string $ad_name Advertisement name |
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| 582 | * @return void |
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| 583 | */ |
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| 584 | 3 | protected function log($action, $ad_name) |
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| 588 | } |
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| 589 |