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 | private $data = array(); |
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21 | |||
22 | /** @var \phpbb\template\template */ |
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23 | protected $template; |
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24 | |||
25 | /** @var \phpbb\language\language */ |
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26 | protected $language; |
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27 | |||
28 | /** @var \phpbb\request\request */ |
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29 | protected $request; |
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30 | |||
31 | /** @var \phpbb\ads\ad\manager */ |
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32 | protected $manager; |
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33 | |||
34 | /** @var \phpbb\config\db_text */ |
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35 | protected $config_text; |
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36 | |||
37 | /** @var \phpbb\config\config */ |
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38 | protected $config; |
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39 | |||
40 | /** @var \phpbb\group\helper */ |
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41 | protected $group_helper; |
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42 | |||
43 | /** @var \phpbb\ads\controller\admin_input */ |
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44 | protected $input; |
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45 | |||
46 | /** @var \phpbb\ads\controller\admin_helper */ |
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47 | protected $helper; |
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48 | |||
49 | /** @var \phpbb\ads\analyser\manager */ |
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50 | protected $analyser; |
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51 | |||
52 | /** @var string root_path */ |
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53 | protected $root_path; |
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54 | |||
55 | /** @var string php_ext */ |
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56 | protected $php_ext; |
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57 | |||
58 | /** @var string Custom form action */ |
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59 | protected $u_action; |
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60 | |||
61 | /** |
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62 | * Constructor |
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63 | * |
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64 | * @param \phpbb\template\template $template Template object |
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65 | * @param \phpbb\language\language $language Language object |
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66 | * @param \phpbb\request\request $request Request object |
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67 | * @param \phpbb\ads\ad\manager $manager Advertisement manager object |
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68 | * @param \phpbb\config\db_text $config_text Config text object |
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69 | * @param \phpbb\config\config $config Config object |
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70 | * @param \phpbb\group\helper $group_helper Group helper object |
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71 | * @param \phpbb\ads\controller\admin_input $input Admin input object |
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72 | * @param \phpbb\ads\controller\admin_helper $helper Admin helper object |
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73 | * @param \phpbb\ads\analyser\manager $analyser Ad code analyser object |
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74 | * @param string $root_path phpBB root path |
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75 | * @param string $php_ext PHP extension |
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76 | */ |
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77 | 32 | 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, $root_path, $php_ext) |
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92 | |||
93 | /** |
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94 | * Process user request for manage mode |
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95 | * |
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96 | * @return void |
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97 | */ |
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98 | 6 | public function mode_manage() |
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112 | |||
113 | /** |
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114 | * Process user request for settings mode |
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115 | * |
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116 | * @return void |
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117 | */ |
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118 | 3 | public function mode_settings() |
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157 | |||
158 | /** |
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159 | * Set page url |
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160 | * |
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161 | * @param string $u_action Custom form action |
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162 | * @return void |
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163 | */ |
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164 | 26 | public function set_page_url($u_action) |
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168 | |||
169 | /** |
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170 | * Get ACP page title for Ads module |
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171 | * |
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172 | * @return string Language string for Ads ACP module |
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173 | */ |
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174 | 1 | public function get_page_title() |
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178 | |||
179 | /** |
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180 | * Add an advertisement |
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181 | * |
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182 | * @return void |
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183 | */ |
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184 | 9 | public function action_add() |
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202 | |||
203 | /** |
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204 | * Edit an advertisement |
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205 | * |
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206 | * @return void |
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207 | */ |
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208 | 7 | public function action_edit() |
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234 | |||
235 | /** |
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236 | * Enable an advertisement |
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237 | * |
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238 | * @return void |
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239 | */ |
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240 | 4 | public function action_enable() |
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244 | |||
245 | /** |
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246 | * Disable an advertisement |
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247 | * |
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248 | * @return void |
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249 | */ |
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250 | 4 | public function action_disable() |
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254 | |||
255 | /** |
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256 | * Delete an advertisement |
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257 | * |
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258 | * @return void |
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259 | */ |
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260 | 3 | public function action_delete() |
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300 | |||
301 | /** |
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302 | * Display the ads |
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303 | * |
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304 | * @return void |
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305 | */ |
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306 | 1 | public function list_ads() |
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329 | |||
330 | 1 | protected function assign_ad_template_vars($row, $ad_expired, $ad_end_date, $ad_enabled) |
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347 | |||
348 | /** |
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349 | * Perform general tasks |
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350 | * |
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351 | * @return void |
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352 | */ |
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353 | 9 | protected function setup() |
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365 | |||
366 | 12 | protected function get_submitted_action() |
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379 | |||
380 | 8 | protected function assign_data() |
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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 $enable Enable or disable the advertisement? |
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391 | * @return void |
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392 | */ |
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393 | 6 | protected function ad_enable($enable) |
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421 | |||
422 | /** |
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423 | * Prepare advertisement preview |
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424 | * |
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425 | * @return void |
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426 | */ |
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427 | 2 | protected function preview() |
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431 | |||
432 | 1 | protected function upload_banner() |
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436 | |||
437 | 1 | protected function analyse_ad_code() |
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441 | |||
442 | 6 | protected function submit() |
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454 | |||
455 | 8 | protected function set_output_vars($action, $ad_id) |
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467 | |||
468 | 1 | protected function add_ad() |
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477 | |||
478 | protected function edit_ad($ad_id) |
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495 | |||
496 | /** |
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497 | * Print success message. |
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498 | * |
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499 | * It takes arguments in the form of a language key, followed by language substitution values. |
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500 | */ |
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501 | 5 | protected function success() |
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505 | |||
506 | /** |
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507 | * Print error message. |
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508 | * |
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509 | * It takes arguments in the form of a language key, followed by language substitution values. |
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510 | */ |
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511 | 4 | protected function error() |
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515 | } |
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516 |
In PHP, under loose comparison (like
==
, or!=
, orswitch
conditions), values of different types might be equal.For
string
values, the empty string''
is a special case, in particular the following results might be unexpected: