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 Bbb 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 Bbb, and based on these observations, apply Extract Interface, too.
1 | <?php |
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24 | class Bbb |
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25 | { |
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26 | use initMeeting, |
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27 | initRecordings, |
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28 | initHooks, |
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29 | initConfigXml, |
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30 | initExtra; |
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31 | |||
32 | /** |
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33 | * @var |
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34 | */ |
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35 | private $response; |
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36 | /** |
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37 | * @var BigBlueButton |
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38 | */ |
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39 | protected $bbb; |
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40 | |||
41 | |||
42 | /** |
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43 | * Bbb constructor. |
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44 | * |
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45 | * @param BigBlueButton $bbb |
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46 | */ |
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47 | public function __construct(BigBlueButton $bbb) |
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51 | |||
52 | /** |
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53 | * @return self |
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54 | */ |
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55 | public function make() |
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59 | |||
60 | /** |
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61 | * @return BigBlueButton |
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62 | */ |
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63 | public function source() |
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67 | |||
68 | /** |
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69 | * check url and secret is working |
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70 | * @return bool |
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71 | */ |
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72 | public function isConnect() |
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81 | |||
82 | /** |
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83 | * Return a list of all meetings |
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84 | * |
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85 | * @return \Illuminate\Support\Collection |
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86 | */ |
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87 | public function all() |
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103 | |||
104 | |||
105 | /** |
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106 | * $meeting |
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107 | * |
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108 | * @param $meeting |
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109 | * |
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110 | * required fields |
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111 | * meetingID |
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112 | * meetingName |
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113 | * |
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114 | * @return mixed |
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115 | */ |
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116 | View Code Duplication | public function create($meeting) |
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129 | |||
130 | /** |
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131 | * @param $meeting |
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132 | * |
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133 | * required fields: |
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134 | * meetingID |
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135 | * |
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136 | * @return bool |
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137 | */ |
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138 | View Code Duplication | public function isMeetingRunning($meeting) |
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154 | |||
155 | /** |
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156 | * Join meeting |
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157 | * |
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158 | * @param $meeting |
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159 | * required fields |
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160 | * |
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161 | * meetingID |
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162 | * userName join by name |
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163 | * password which role want to join |
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164 | * |
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165 | * @return string |
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166 | */ |
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167 | public function join($meeting) |
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179 | |||
180 | /** |
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181 | * Returns information about the meeting |
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182 | * |
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183 | * @param $meeting |
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184 | * required fields |
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185 | * meetingID |
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186 | * moderatorPW must be there moderator password |
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187 | * |
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188 | * @return \Illuminate\Support\Collection |
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189 | */ |
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190 | View Code Duplication | public function getMeetingInfo($meeting) |
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203 | |||
204 | /** |
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205 | * @param $parameters |
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206 | * |
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207 | * required fields |
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208 | * meetingID |
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209 | * meetingName |
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210 | * userName |
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211 | * attendeePW |
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212 | * moderatorPW |
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213 | * |
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214 | * @return mixed |
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215 | */ |
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216 | public function start($parameters) |
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220 | |||
221 | /** |
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222 | * Close meeting |
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223 | * |
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224 | * @param $meeting |
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225 | * required fields: |
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226 | * meetingID |
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227 | * moderatorPW close meeting must be there moderator password |
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228 | * |
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229 | * @return bool |
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230 | */ |
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231 | public function close($meeting) |
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244 | |||
245 | /** |
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246 | * |
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247 | * @param $recording |
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248 | * required fields |
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249 | * meetingID |
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250 | * |
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251 | * optional fields |
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252 | * recordID |
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253 | * state |
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254 | * |
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255 | * @return \Illuminate\Support\Collection |
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256 | */ |
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257 | public function getRecordings($recording) |
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275 | |||
276 | /** |
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277 | * @param $recording |
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278 | * recordID as string(separated by comma) |
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279 | * publish as bool |
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280 | * |
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281 | * @return bool |
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282 | */ |
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283 | View Code Duplication | public function publishRecordings($recording) |
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299 | |||
300 | /** |
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301 | * @param $recording |
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302 | * |
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303 | * required fields |
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304 | * recordingID |
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305 | * |
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306 | * @return \Illuminate\Support\Collection |
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307 | */ |
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308 | public function deleteRecordings($recording) |
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318 | |||
319 | /** |
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320 | * @param $configXml |
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321 | * |
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322 | * @return \Illuminate\Support\Collection |
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323 | * @throws \Exception |
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324 | */ |
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325 | public function setConfigXml($configXml) |
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335 | |||
336 | /** |
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337 | * @return \BigBlueButton\Responses\GetDefaultConfigXMLResponse |
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338 | */ |
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339 | public function getDefaultConfigXml() |
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345 | |||
346 | /** |
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347 | * @return \Illuminate\Support\Collection |
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348 | */ |
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349 | public function getApiVersion() |
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355 | |||
356 | /** |
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357 | * @param $hooks |
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358 | * |
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359 | * @return \Illuminate\Support\Collection |
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360 | */ |
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361 | public function hooksCreate($hooks) |
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371 | |||
372 | /** |
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373 | * @param $hooks |
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374 | * |
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375 | * @return \Illuminate\Support\Collection |
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376 | */ |
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377 | public function hooksDestroy($hooks) |
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387 | |||
388 | } |
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389 |
Let’s assume that you have a directory layout like this:
and let’s assume the following content of
Bar.php
:If both files
OtherDir/Foo.php
andSomeDir/Foo.php
are loaded in the same runtime, you will see a PHP error such as the following:PHP Fatal error: Cannot use SomeDir\Foo as Foo because the name is already in use in OtherDir/Foo.php
However, as
OtherDir/Foo.php
does not necessarily have to be loaded and the error is only triggered if it is loaded beforeOtherDir/Bar.php
, this problem might go unnoticed for a while. In order to prevent this error from surfacing, you must import the namespace with a different alias: