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 UserAgentApiCom 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 UserAgentApiCom, and based on these observations, apply Extract Interface, too.
1 | <?php |
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15 | class UserAgentApiCom extends AbstractHttpProvider |
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16 | { |
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17 | protected $detectionCapabilities = [ |
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18 | |||
19 | 'browser' => [ |
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20 | 'name' => true, |
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21 | 'version' => true, |
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22 | ], |
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23 | |||
24 | 'renderingEngine' => [ |
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25 | 'name' => true, |
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26 | 'version' => true, |
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27 | ], |
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28 | |||
29 | 'operatingSystem' => [ |
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30 | 'name' => false, |
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31 | 'version' => false, |
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32 | ], |
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33 | |||
34 | 'device' => [ |
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35 | 'model' => false, |
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36 | 'brand' => false, |
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37 | 'type' => true, |
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38 | 'isMobile' => false, |
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39 | 'isTouch' => false, |
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40 | ], |
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41 | |||
42 | 'bot' => [ |
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43 | 'isBot' => true, |
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44 | 'name' => true, |
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45 | 'type' => false, |
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46 | ], |
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47 | ]; |
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48 | |||
49 | private static $uri = 'https://useragentapi.com/api/v3/json'; |
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50 | |||
51 | private $apiKey; |
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52 | |||
53 | 15 | public function __construct(Client $client, $apiKey) |
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59 | |||
60 | 2 | public function getName() |
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64 | |||
65 | 1 | public function getComposerPackageName() |
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69 | |||
70 | 1 | public function getVersion() |
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74 | |||
75 | /** |
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76 | * |
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77 | * @param string $userAgent |
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78 | * @param array $headers |
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79 | * @return stdClass |
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80 | * @throws Exception\RequestException |
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81 | */ |
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82 | 11 | protected function getResult($userAgent, array $headers) |
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151 | |||
152 | /** |
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153 | * |
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154 | * @param stdClass $resultRaw |
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155 | * @return boolean |
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156 | */ |
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157 | 4 | private function isBot(stdClass $resultRaw) |
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165 | |||
166 | /** |
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167 | * |
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168 | * @param Model\Bot $bot |
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169 | * @param stdClass $resultRaw |
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170 | */ |
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171 | 1 | View Code Duplication | private function hydrateBot(Model\Bot $bot, stdClass $resultRaw) |
179 | |||
180 | /** |
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181 | * |
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182 | * @param Model\Browser $browser |
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183 | * @param stdClass $resultRaw |
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184 | */ |
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185 | 3 | private function hydrateBrowser(Model\Browser $browser, stdClass $resultRaw) |
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195 | |||
196 | /** |
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197 | * |
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198 | * @param Model\RenderingEngine $engine |
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199 | * @param stdClass $resultRaw |
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200 | */ |
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201 | 3 | private function hydrateRenderingEngine(Model\RenderingEngine $engine, stdClass $resultRaw) |
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211 | |||
212 | /** |
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213 | * |
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214 | * @param Model\UserAgent $device |
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215 | * @param stdClass $resultRaw |
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216 | */ |
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217 | 3 | private function hydrateDevice(Model\Device $device, stdClass $resultRaw) |
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223 | |||
224 | 11 | public function parse($userAgent, array $headers = []) |
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252 | } |
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253 |
This check looks from parameters that have been defined for a function or method, but which are not used in the method body.