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 | 30 | 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 $u_action Custom form action |
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162 | * @return void |
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163 | */ |
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164 | 24 | public function set_page_url($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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185 | { |
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186 | 6 | add_form_key('phpbb/ads/add'); |
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187 | |||
188 | 6 | $action = $this->get_submitted_action(); |
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189 | if ($action) |
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190 | 6 | { |
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191 | 5 | $this->data = $this->input->get_form_data('phpbb/ads/add'); |
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192 | 5 | $this->{$action}(); |
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193 | 4 | $this->assign_data(); |
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194 | 4 | } |
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195 | else |
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196 | 9 | { |
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197 | 1 | $this->helper->assign_locations(); |
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198 | } |
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199 | |||
200 | // Set output vars for display in the template |
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201 | 5 | $this->template->assign_vars(array( |
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202 | 5 | 'S_ADD_AD' => true, |
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203 | 5 | 'U_BACK' => $this->u_action, |
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204 | 5 | 'U_ACTION' => "{$this->u_action}&action=add", |
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205 | 5 | 'PICKER_DATE_FORMAT' => input::DATE_FORMAT, |
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206 | 5 | 'U_FIND_USERNAME' => $this->helper->get_find_username_link(), |
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207 | 5 | )); |
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208 | 5 | } |
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209 | |||
210 | /** |
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211 | * Edit an advertisement |
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212 | * |
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213 | * @return void |
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214 | */ |
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215 | 4 | public function action_edit() |
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249 | |||
250 | /** |
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251 | * Enable an advertisement |
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252 | * |
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253 | * @return void |
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254 | */ |
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255 | 4 | public function action_enable() |
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259 | |||
260 | /** |
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261 | * Disable an advertisement |
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262 | * |
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263 | * @return void |
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264 | */ |
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265 | 4 | public function action_disable() |
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269 | |||
270 | /** |
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271 | * Delete an advertisement |
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272 | * |
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273 | * @return void |
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274 | */ |
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275 | 3 | public function action_delete() |
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315 | |||
316 | /** |
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317 | * Display the ads |
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318 | * |
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319 | * @return void |
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320 | */ |
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321 | 1 | public function list_ads() |
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357 | |||
358 | /** |
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359 | * Perform general tasks |
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360 | * |
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361 | * @return void |
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362 | */ |
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363 | 9 | protected function setup() |
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375 | |||
376 | 10 | protected function get_submitted_action() |
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389 | |||
390 | 5 | protected function assign_data() |
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396 | |||
397 | /** |
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398 | * Enable/disable an advertisement |
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399 | * |
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400 | * @param bool $enable Enable or disable the advertisement? |
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401 | * @return void |
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402 | */ |
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403 | 6 | protected function ad_enable($enable) |
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431 | |||
432 | /** |
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433 | * Prepare advertisement preview |
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434 | * |
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435 | * @return void |
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436 | */ |
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437 | 1 | protected function preview() |
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441 | |||
442 | 1 | protected function upload_banner() |
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446 | |||
447 | 1 | protected function analyse_ad_code() |
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451 | |||
452 | 2 | protected function submit() |
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483 | |||
484 | /** |
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485 | * Print success message. |
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486 | * |
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487 | * It takes arguments in the form of a language key, followed by language substitution values. |
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488 | */ |
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489 | 5 | protected function success() |
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493 | |||
494 | /** |
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495 | * Print error message. |
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496 | * |
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497 | * It takes arguments in the form of a language key, followed by language substitution values. |
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498 | */ |
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499 | 4 | protected function error() |
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503 | } |
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504 |
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: