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 CmsComponent 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 CmsComponent, and based on these observations, apply Extract Interface, too.
1 | <?php |
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8 | class CmsComponent extends BaseComponent |
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9 | { |
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10 | /** |
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11 | * @var \library\storage\Storage |
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12 | */ |
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13 | protected $storage; |
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14 | /** |
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15 | * @var string |
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16 | */ |
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17 | protected $invalidCredentialsMsg = 'Invalid username / password combination'; |
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18 | |||
19 | /** |
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20 | * @var null|string |
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21 | */ |
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22 | protected $subTemplate = null; |
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23 | |||
24 | /** |
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25 | * @param \library\storage\Storage $storage |
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26 | * |
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27 | * @return void |
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28 | */ |
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29 | public function run(Storage $storage) |
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44 | |||
45 | /** |
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46 | * See if a user is logged or wants to log in and |
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47 | * takes appropriate actions. |
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48 | * |
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49 | * @throws \Exception |
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50 | */ |
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51 | protected function checkLogin() |
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81 | |||
82 | /** |
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83 | * Overrides normal behaviour and only renders the |
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84 | * login screen |
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85 | * |
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86 | * @throws \Exception |
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87 | */ |
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88 | protected function showLogin() |
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95 | |||
96 | /** |
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97 | * As an exception, to keep the initial file structure simple |
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98 | * the cms implements it's own routing, apart from the regular sitemap functionality |
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99 | * |
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100 | * @throws \Exception |
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101 | */ |
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102 | protected function routing() |
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140 | |||
141 | /** |
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142 | * @param $remoteAddress |
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143 | * @throws \Exception |
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144 | */ |
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145 | View Code Duplication | private function checkWhiteList($remoteAddress) |
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146 | { |
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147 | if (isset($this->parameters['whitelistIps'])) { |
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148 | $whitelistIps = explode(',', $this->parameters['whitelistIps']); |
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149 | $whitelistIps = array_map("trim", $whitelistIps); |
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150 | if (!in_array($remoteAddress, $whitelistIps)) { |
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151 | throw new \Exception('Ip address ' . $remoteAddress . ' is not on whitelist'); |
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152 | } |
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153 | } |
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154 | } |
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155 | |||
156 | /** |
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157 | * @param $remoteAddress |
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158 | * @throws \Exception |
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159 | */ |
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160 | View Code Duplication | private function checkBlackList($remoteAddress) |
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161 | { |
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162 | if (isset($this->parameters['blacklistIps'])) { |
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163 | $blacklistIps = explode(',', $this->parameters['blacklistIps']); |
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164 | $blacklistIps = array_map("trim", $blacklistIps); |
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165 | if (in_array($remoteAddress, $blacklistIps)) { |
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166 | throw new \Exception('Ip address ' . $remoteAddress . ' is on blacklist'); |
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167 | } |
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168 | } |
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169 | } |
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170 | |||
171 | /** |
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172 | * @param $request |
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173 | * @return mixed|string |
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174 | */ |
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175 | private function getRelativeCmsUri($request) |
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185 | |||
186 | /** |
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187 | * @param $request |
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188 | * @param $relativeCmsUri |
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189 | */ |
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190 | private function documentsRouting($request, $relativeCmsUri) |
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200 | |||
201 | /** |
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202 | * @param $request |
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203 | * @param $relativeCmsUri |
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204 | */ |
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205 | private function sitemapRouting($request, $relativeCmsUri) |
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206 | { |
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207 | if ($relativeCmsUri == '/sitemap') { |
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208 | $this->subTemplate = 'cms/sitemap'; |
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209 | if (isset($request::$post['save'])) { |
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210 | $this->storage->saveSitemap($request::$post); |
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211 | } |
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212 | $this->parameters['mainNavClass'] = 'sitemap'; |
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213 | $this->parameters['sitemap'] = $this->storage->getSitemap(); |
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214 | } elseif ($relativeCmsUri == '/sitemap/new') { |
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215 | $this->subTemplate = 'cms/sitemap/form'; |
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216 | $this->parameters['mainNavClass'] = 'sitemap'; |
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217 | View Code Duplication | if (isset($request::$post['title'], $request::$post['template'], $request::$post['component'])) { |
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218 | $this->storage->addSitemapItem($request::$post); |
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219 | header('Location: ' . $request::$subfolders . $this->parameters['cmsPrefix'] . '/sitemap'); |
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220 | exit; |
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221 | } |
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222 | } elseif ($relativeCmsUri == '/sitemap/edit' && isset($request::$get['slug'])) { |
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223 | $this->subTemplate = 'cms/sitemap/form'; |
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224 | $this->parameters['mainNavClass'] = 'sitemap'; |
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225 | $sitemapItem = $this->storage->getSitemapItemBySlug($request::$get['slug']); |
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226 | View Code Duplication | if (isset($request::$post['title'], $request::$post['template'], $request::$post['component'])) { |
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227 | $this->storage->saveSitemapItem($request::$get['slug'], $request::$post); |
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228 | header('Location: ' . $request::$subfolders . $this->parameters['cmsPrefix'] . '/sitemap'); |
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229 | exit; |
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230 | } |
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231 | $this->parameters['sitemapItem'] = $sitemapItem; |
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232 | } elseif ($relativeCmsUri == '/sitemap/delete' && isset($request::$get['slug'])) { |
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233 | $this->storage->deleteSitemapItemBySlug($request::$get['slug']); |
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234 | header('Location: ' . $request::$subfolders . $this->parameters['cmsPrefix'] . '/sitemap'); |
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235 | exit; |
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236 | } |
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237 | } |
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238 | |||
239 | /** |
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240 | * @param $request |
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241 | * @param $relativeCmsUri |
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242 | */ |
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243 | private function imagesRouting($request, $relativeCmsUri) |
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271 | |||
272 | /** |
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273 | * @param $relativeCmsUri |
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274 | */ |
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275 | private function apiRouting($relativeCmsUri) |
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288 | |||
289 | /** |
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290 | * @param $request |
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291 | * @param $relativeCmsUri |
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292 | */ |
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293 | private function filesRouting($request, $relativeCmsUri) |
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315 | |||
316 | /** |
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317 | * @param $slug |
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318 | */ |
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319 | private function downloadFile($slug) |
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339 | |||
340 | /** |
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341 | * @param $request |
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342 | * @param $relativeCmsUri |
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343 | */ |
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344 | private function configurationRouting($request, $relativeCmsUri) |
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357 | |||
358 | /** |
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359 | * @param $request |
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360 | * @param $relativeCmsUri |
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361 | * @throws \Exception |
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362 | */ |
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363 | private function documentRouting($request, $relativeCmsUri) |
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413 | |||
414 | /** |
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415 | * @param $request |
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416 | * @param $relativeCmsUri |
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417 | */ |
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418 | private function folderRouting($request, $relativeCmsUri) |
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454 | |||
455 | /** |
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456 | * @param $request |
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457 | * @param $relativeCmsUri |
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458 | */ |
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459 | View Code Duplication | private function usersRouting($request, $relativeCmsUri) |
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460 | { |
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461 | if ($relativeCmsUri == '/configuration/users') { |
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462 | $this->subTemplate = 'cms/configuration/users'; |
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463 | $this->parameters['mainNavClass'] = 'configuration'; |
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464 | $this->parameters['users'] = $this->storage->getUsers(); |
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465 | } elseif ($relativeCmsUri == '/configuration/users/new') { |
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466 | $this->subTemplate = 'cms/configuration/users-form'; |
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467 | $this->parameters['mainNavClass'] = 'configuration'; |
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468 | if (isset($_POST['username'])) { |
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469 | $this->storage->addUser($request::$post); |
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470 | header('Location: ' . $request::$subfolders . $this->parameters['cmsPrefix'] . '/configuration/users'); |
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471 | exit; |
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472 | } |
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473 | } elseif ($relativeCmsUri == '/configuration/users/delete' && isset($request::$get['slug'])) { |
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474 | $this->storage->deleteUserBySlug($request::$get['slug']); |
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475 | header('Location: ' . $request::$subfolders . $this->parameters['cmsPrefix'] . '/configuration/users'); |
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476 | exit; |
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477 | } elseif ($relativeCmsUri == '/configuration/users/edit' && isset($request::$get['slug'])) { |
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478 | $this->subTemplate = 'cms/configuration/users-form'; |
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479 | $this->parameters['mainNavClass'] = 'configuration'; |
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480 | $this->parameters['user'] = $this->storage->getUserBySlug($request::$get['slug']); |
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481 | if (isset($_POST['username'])) { |
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482 | $this->storage->saveUser($request::$get['slug'], $request::$post); |
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483 | header('Location: ' . $request::$subfolders . $this->parameters['cmsPrefix'] . '/configuration/users'); |
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484 | exit; |
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485 | } |
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486 | } |
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487 | } |
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488 | |||
489 | /** |
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490 | * @param $request |
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491 | * @param $relativeCmsUri |
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492 | */ |
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493 | private function documentTypesRouting($request, $relativeCmsUri) |
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527 | |||
528 | /** |
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529 | * @param $request |
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530 | * @param $relativeCmsUri |
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531 | */ |
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532 | private function bricksRouting($request, $relativeCmsUri) |
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566 | |||
567 | /** |
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568 | * @param $request |
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569 | * @param $relativeCmsUri |
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570 | */ |
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571 | View Code Duplication | private function imageSetRouting($request, $relativeCmsUri) |
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572 | { |
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573 | if ($relativeCmsUri == '/configuration/image-set') { |
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574 | $this->subTemplate = 'cms/configuration/image-set'; |
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575 | $this->parameters['mainNavClass'] = 'configuration'; |
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576 | $this->parameters['imageSet'] = $this->storage->getImageSet(); |
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577 | } elseif ($relativeCmsUri == '/configuration/image-set/edit' && isset($request::$get['slug'])) { |
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578 | $this->subTemplate = 'cms/configuration/image-set-form'; |
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579 | $this->parameters['mainNavClass'] = 'configuration'; |
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580 | $imageSet = $this->storage->getImageSetBySlug($request::$get['slug']); |
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581 | if (isset($request::$post['title'])) { |
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582 | $this->storage->saveImageSet($request::$get['slug'], $request::$post); |
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583 | header('Location: ' . $request::$subfolders . $this->parameters['cmsPrefix'] . '/configuration/image-set'); |
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584 | exit; |
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585 | } |
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586 | $this->parameters['imageSet'] = $imageSet; |
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587 | } elseif ($relativeCmsUri == '/configuration/image-set/new') { |
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588 | $this->subTemplate = 'cms/configuration/image-set-form'; |
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589 | $this->parameters['mainNavClass'] = 'configuration'; |
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590 | if (isset($request::$post['title'])) { |
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591 | $this->storage->addImageSet($request::$post); |
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592 | header('Location: ' . $request::$subfolders . $this->parameters['cmsPrefix'] . '/configuration/image-set'); |
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593 | exit; |
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594 | } |
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595 | } elseif ($relativeCmsUri == '/configuration/image-set/delete' && isset($request::$get['slug'])) { |
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596 | $this->storage->deleteImageSetBySlug($request::$get['slug']); |
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597 | header('Location: ' . $request::$subfolders . $this->parameters['cmsPrefix'] . '/configuration/image-set'); |
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598 | exit; |
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599 | } |
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600 | } |
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601 | |||
602 | /** |
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603 | * @param $request |
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604 | * @param $relativeCmsUri |
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605 | */ |
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606 | View Code Duplication | private function applicationComponentRouting($request, $relativeCmsUri) |
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607 | { |
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608 | if ($relativeCmsUri == '/configuration/application-components') { |
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609 | $this->subTemplate = 'cms/configuration/application-components'; |
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610 | $this->parameters['mainNavClass'] = 'configuration'; |
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611 | $this->parameters['applicationComponents'] = $this->storage->getApplicationComponents(); |
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612 | } elseif ($relativeCmsUri == '/configuration/application-components/new') { |
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613 | $this->subTemplate = 'cms/configuration/application-components-form'; |
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614 | $this->parameters['mainNavClass'] = 'configuration'; |
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615 | if (isset($request::$post['title'])) { |
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616 | $this->storage->addApplicationComponent($request::$post); |
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617 | header('Location: ' . $request::$subfolders . $this->parameters['cmsPrefix'] . '/configuration/application-components'); |
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618 | exit; |
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619 | } |
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620 | } elseif ($relativeCmsUri == '/configuration/application-components/edit' && isset($request::$get['slug'])) { |
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621 | $this->subTemplate = 'cms/configuration/application-components-form'; |
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622 | $this->parameters['mainNavClass'] = 'configuration'; |
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623 | $applicationComponent = $this->storage->getApplicationComponentBySlug($request::$get['slug']); |
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624 | if (isset($request::$post['title'])) { |
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625 | $this->storage->saveApplicationComponent($request::$get['slug'], $request::$post); |
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626 | header('Location: ' . $request::$subfolders . $this->parameters['cmsPrefix'] . '/configuration/application-components'); |
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627 | exit; |
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628 | } |
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629 | $this->parameters['applicationComponent'] = $applicationComponent; |
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630 | } elseif ($relativeCmsUri == '/configuration/application-components/delete' && isset($request::$get['slug'])) { |
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631 | $this->storage->deleteApplicationComponentBySlug($request::$get['slug']); |
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632 | header('Location: ' . $request::$subfolders . $this->parameters['cmsPrefix'] . '/configuration/application-components'); |
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633 | exit; |
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634 | } |
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635 | } |
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636 | |||
637 | private function logOffRouting($request, $relativeCmsUri) |
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646 | } |
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647 | } |
Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation.
You can also find more detailed suggestions in the “Code” section of your repository.