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 string php_ext */ |
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43 | protected $php_ext; |
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44 | |||
45 | /** @var string ext_path */ |
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46 | protected $ext_path; |
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47 | |||
48 | /** @var string Custom form action */ |
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49 | protected $u_action; |
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50 | |||
51 | /** @var array Form validation errors */ |
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52 | protected $errors = array(); |
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53 | |||
54 | /** |
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55 | * Constructor |
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56 | * |
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57 | * @param \phpbb\template\template $template Template object |
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58 | * @param \phpbb\user $user User object |
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59 | * @param \phpbb\request\request $request Request object |
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60 | * @param \phpbb\ads\ad\manager $manager Advertisement manager object |
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61 | * @param \phpbb\ads\location\manager $location_manager Template location manager object |
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62 | * @param \phpbb\log\log $log The phpBB log system |
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63 | * @param \phpbb\config\db_text $config_text Config text object |
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64 | * @param string $php_ext PHP extension |
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65 | * @param string $ext_path Path to this extension |
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66 | */ |
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67 | 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, $php_ext, $ext_path) |
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79 | |||
80 | /** |
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81 | * Process user request for manage mode |
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82 | * |
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83 | * @return void |
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84 | */ |
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85 | 6 | public function mode_manage() |
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99 | |||
100 | /** |
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101 | * Process user request for settings mode |
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102 | * |
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103 | * @return void |
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104 | */ |
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105 | 3 | public function mode_settings() |
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146 | |||
147 | /** |
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148 | * Set page url |
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149 | * |
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150 | * @param string $u_action Custom form action |
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151 | * @return void |
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152 | */ |
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153 | 28 | public function set_page_url($u_action) |
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157 | |||
158 | /** |
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159 | * Get ACP page title for Ads module |
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160 | * |
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161 | * @return string Language string for Ads ACP module |
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162 | */ |
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163 | 1 | public function get_page_title() |
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167 | |||
168 | /** |
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169 | * Add an advertisement |
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170 | * |
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171 | * @return void |
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172 | */ |
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173 | 7 | public function action_add() |
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213 | |||
214 | /** |
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215 | * Edit an advertisement |
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216 | * |
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217 | * @return void |
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218 | */ |
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219 | 9 | public function action_edit() |
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275 | |||
276 | /** |
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277 | * Enable an advertisement |
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278 | * |
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279 | * @return void |
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280 | */ |
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281 | 3 | public function action_enable() |
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285 | |||
286 | /** |
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287 | * Disable an advertisement |
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288 | * |
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289 | * @return void |
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290 | */ |
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291 | 3 | public function action_disable() |
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295 | |||
296 | /** |
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297 | * Delete an advertisement |
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298 | * |
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299 | * @return void |
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300 | */ |
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301 | 3 | public function action_delete() |
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341 | |||
342 | /** |
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343 | * Display the ads |
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344 | * |
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345 | * @return void |
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346 | */ |
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347 | 1 | public function list_ads() |
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374 | |||
375 | /** |
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376 | * Perform general tasks |
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377 | * |
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378 | * @return void |
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379 | */ |
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380 | 9 | protected function setup() |
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386 | |||
387 | /** |
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388 | * Enable/disable an advertisement |
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389 | * |
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390 | * @param bool $enable Enable or disable the advertisement? |
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391 | * @return void |
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392 | */ |
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393 | 4 | protected function ad_enable($enable) |
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421 | |||
422 | /** |
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423 | * Get admin form data. |
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424 | * |
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425 | * @param string $form_name The form name. |
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426 | * @return array Form data |
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427 | */ |
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428 | 13 | protected function get_form_data($form_name) |
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476 | |||
477 | /** |
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478 | * Assign form data to the template. |
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479 | * |
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480 | * @param array $data The form data. |
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481 | * @return void |
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482 | */ |
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483 | 11 | protected function assign_form_data($data) |
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496 | |||
497 | /** |
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498 | * Prepare end date for display |
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499 | * |
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500 | * @param mixed $end_date End date. |
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501 | * @return string End date prepared for display. |
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502 | */ |
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503 | 11 | protected function prepare_end_date($end_date) |
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517 | |||
518 | /** |
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519 | * Assign template locations data to the template. |
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520 | * |
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521 | * @param mixed $data The form data or nothing. |
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522 | * @return void |
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523 | */ |
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524 | 12 | protected function assign_locations($data = false) |
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536 | |||
537 | /** |
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538 | * Prepare advertisement preview |
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539 | * |
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540 | * @param string $code Ad code to preview |
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541 | * @return void |
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542 | */ |
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543 | 2 | protected function ad_preview($code) |
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547 | |||
548 | /** |
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549 | * Print success message. |
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550 | * |
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551 | * It takes arguments in the form of a language key, followed by language substitution values. |
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552 | */ |
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553 | 6 | protected function success() |
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557 | |||
558 | /** |
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559 | * Print error message. |
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560 | * |
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561 | * It takes arguments in the form of a language key, followed by language substitution values. |
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562 | */ |
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563 | 5 | protected function error() |
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567 | |||
568 | /** |
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569 | * Log action |
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570 | * |
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571 | * @param string $action Performed action in uppercase |
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572 | * @param string $ad_name Advertisement name |
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573 | * @return void |
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574 | */ |
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575 | 3 | protected function log($action, $ad_name) |
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579 | } |
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580 |