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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18 | class admin_controller |
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19 | { |
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20 | /** @var array Form data */ |
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21 | protected $data = array(); |
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22 | |||
23 | /** @var \phpbb\template\template */ |
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24 | protected $template; |
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25 | |||
26 | /** @var \phpbb\language\language */ |
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27 | protected $language; |
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28 | |||
29 | /** @var \phpbb\request\request */ |
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30 | protected $request; |
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31 | |||
32 | /** @var \phpbb\ads\ad\manager */ |
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33 | protected $manager; |
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34 | |||
35 | /** @var \phpbb\config\db_text */ |
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36 | protected $config_text; |
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37 | |||
38 | /** @var \phpbb\config\config */ |
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39 | protected $config; |
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40 | |||
41 | /** @var \phpbb\group\helper */ |
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42 | protected $group_helper; |
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43 | |||
44 | /** @var \phpbb\ads\controller\admin_input */ |
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45 | protected $input; |
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46 | |||
47 | /** @var \phpbb\ads\controller\admin_helper */ |
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48 | protected $helper; |
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49 | |||
50 | /** @var \phpbb\ads\analyser\manager */ |
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51 | protected $analyser; |
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52 | |||
53 | /** @var string Custom form action */ |
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54 | protected $u_action; |
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55 | |||
56 | /** |
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57 | * Constructor |
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58 | * |
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59 | * @param \phpbb\template\template $template Template object |
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60 | * @param \phpbb\language\language $language Language object |
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61 | * @param \phpbb\request\request $request Request object |
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62 | * @param \phpbb\ads\ad\manager $manager Advertisement manager object |
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63 | * @param \phpbb\config\db_text $config_text Config text object |
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64 | * @param \phpbb\config\config $config Config object |
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65 | * @param \phpbb\group\helper $group_helper Group helper object |
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66 | * @param \phpbb\ads\controller\admin_input $input Admin input object |
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67 | * @param \phpbb\ads\controller\admin_helper $helper Admin helper object |
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68 | * @param \phpbb\ads\analyser\manager $analyser Ad code analyser object |
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69 | */ |
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70 | 33 | public function __construct(\phpbb\template\template $template, \phpbb\language\language $language, \phpbb\request\request $request, \phpbb\ads\ad\manager $manager, \phpbb\config\db_text $config_text, \phpbb\config\config $config, \phpbb\group\helper $group_helper, \phpbb\ads\controller\admin_input $input, \phpbb\ads\controller\admin_helper $helper, \phpbb\ads\analyser\manager $analyser) |
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88 | |||
89 | /** |
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90 | * Set page url |
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91 | * |
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92 | * @param string $u_action Custom form action |
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93 | * @return void |
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94 | */ |
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95 | 27 | public function set_page_url($u_action) |
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99 | |||
100 | /** |
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101 | * Get ACP page title for Ads module |
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102 | * |
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103 | * @return string Language string for Ads ACP module |
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104 | */ |
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105 | 1 | public function get_page_title() |
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109 | |||
110 | /** |
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111 | * Process user request for settings mode |
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112 | * |
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113 | * @return void |
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114 | */ |
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115 | 3 | public function mode_settings() |
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151 | |||
152 | /** |
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153 | * Process user request for manage mode |
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154 | * |
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155 | * @return void |
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156 | */ |
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157 | 29 | public function mode_manage() |
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171 | |||
172 | /** |
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173 | * Add an advertisement |
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174 | * |
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175 | * @return void |
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176 | */ |
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177 | 17 | protected function action_add() |
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200 | |||
201 | /** |
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202 | * Edit an advertisement |
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203 | * |
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204 | * @return void |
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205 | */ |
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206 | 7 | protected function action_edit() |
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237 | |||
238 | /** |
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239 | * Enable an advertisement |
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240 | * |
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241 | * @return void |
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242 | */ |
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243 | 4 | protected function action_enable() |
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247 | |||
248 | /** |
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249 | * Disable an advertisement |
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250 | * |
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251 | * @return void |
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252 | */ |
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253 | 4 | protected function action_disable() |
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257 | |||
258 | /** |
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259 | * Delete an advertisement |
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260 | * |
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261 | * @return void |
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262 | */ |
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263 | 3 | protected function action_delete() |
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303 | |||
304 | /** |
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305 | * Display the list of all ads |
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306 | * |
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307 | * @return void |
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308 | */ |
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309 | 1 | protected function list_ads() |
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345 | |||
346 | /** |
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347 | * Get what action user wants to do with the form. |
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348 | * Possible options are: |
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349 | * - preview ad code |
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350 | * - upload banner to display in an ad code |
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351 | * - analyse ad code |
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352 | * - submit form (either add or edit an ad) |
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353 | * |
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354 | * @return string|false Action name or false when no action was submitted |
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355 | */ |
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356 | 13 | protected function get_submitted_action() |
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369 | |||
370 | /** |
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371 | * Enable/disable an advertisement |
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372 | * |
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373 | * @param bool $enable Enable or disable the advertisement? |
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374 | * @return void |
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375 | */ |
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376 | 6 | protected function ad_enable($enable) |
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404 | |||
405 | /** |
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406 | * Submit action "preview". |
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407 | * Prepare advertisement preview. |
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408 | * |
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409 | * @return void |
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410 | */ |
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411 | 2 | protected function preview() |
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415 | |||
416 | /** |
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417 | * Submit action "upload_banner". |
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418 | * Upload banner and append it to the ad code. |
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419 | * |
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420 | * @return void |
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421 | */ |
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422 | 1 | protected function upload_banner() |
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426 | |||
427 | /** |
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428 | * Submit action "analyse_ad_code". |
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429 | * Upload banner and append it to the ad code. |
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430 | * |
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431 | * @return void |
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432 | */ |
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433 | 1 | protected function analyse_ad_code() |
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437 | |||
438 | /** |
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439 | * Submit action "submit_add". |
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440 | * Add new ad. |
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441 | * |
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442 | * @return void |
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443 | */ |
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444 | 2 | protected function submit_add() |
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456 | |||
457 | /** |
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458 | * Submit action "submit_edit". |
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459 | * Edit ad. |
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460 | * |
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461 | * @return void |
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462 | */ |
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463 | 4 | protected function submit_edit() |
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483 | |||
484 | /** |
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485 | * Print success message. |
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486 | * |
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487 | * @param string $msg Message lang key |
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488 | */ |
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489 | 6 | protected function success($msg) |
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493 | |||
494 | /** |
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495 | * Print error message. |
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496 | * |
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497 | * @param string $msg Message lang key |
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498 | */ |
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499 | 6 | protected function error($msg) |
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503 | } |
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504 |