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 ConsoleIO 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 ConsoleIO, and based on these observations, apply Extract Interface, too.
1 | <?php |
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16 | class ConsoleIO implements IOInterface |
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17 | { |
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18 | protected $input; |
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19 | protected $output; |
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20 | protected $helperSet; |
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21 | protected $authorizations = array(); |
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22 | protected $lastMessage; |
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23 | protected $lastMessageNewline = true; |
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24 | protected $indention = 0; |
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25 | protected $prefix; |
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26 | |||
27 | /** |
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28 | * Constructor. |
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29 | * |
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30 | * @param InputInterface $input The input instance |
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31 | * @param OutputInterface $output The output instance |
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32 | * @param HelperSet $helperSet The helperSet instance |
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33 | */ |
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34 | public function __construct(InputInterface $input, OutputInterface $output, HelperSet $helperSet) |
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40 | |||
41 | /** |
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42 | * {@inheritDoc} |
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43 | */ |
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44 | public function isInteractive() |
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48 | |||
49 | /** |
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50 | * {@inheritDoc} |
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51 | */ |
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52 | public function isDecorated() |
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56 | |||
57 | /** |
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58 | * {@inheritDoc} |
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59 | */ |
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60 | public function isVerbose() |
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64 | |||
65 | /** |
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66 | * Set verbose option |
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67 | * |
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68 | * @param bool $option |
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69 | */ |
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70 | public function setVerbose($option) |
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74 | |||
75 | /** |
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76 | * @param string|array $messages |
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77 | * @return string|array |
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78 | */ |
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79 | protected function applyIndention($messages) |
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91 | |||
92 | /** |
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93 | * @param string|array $messages |
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94 | * @return string|array |
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95 | */ |
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96 | protected function applyPrefix($messages) |
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112 | |||
113 | /** |
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114 | * {@inheritDoc} |
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115 | */ |
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116 | public function write($messages, $newline = true) |
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123 | |||
124 | /** |
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125 | * {@inheritDoc} |
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126 | */ |
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127 | protected function _write($messages, $newline = true) |
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133 | |||
134 | /** |
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135 | * {@inheritDoc} |
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136 | */ |
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137 | public function overwrite($messages, $newline = true, $size = null) |
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174 | |||
175 | /** |
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176 | * {@inheritDoc} |
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177 | */ |
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178 | View Code Duplication | public function select($question, $choices, $default = null, $attempts = false, $errorMessage = 'Value "%s" is invalid') |
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186 | |||
187 | /** |
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188 | * {@inheritDoc} |
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189 | */ |
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190 | View Code Duplication | public function ask($question, $default = null) |
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198 | |||
199 | /** |
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200 | * {@inheritDoc} |
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201 | */ |
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202 | View Code Duplication | public function askConfirmation($question, $default = true) |
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210 | |||
211 | /** |
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212 | * {@inheritDoc} |
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213 | */ |
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214 | View Code Duplication | public function askAndValidate($question, $validator, $attempts = false, $default = null) |
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222 | |||
223 | /** |
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224 | * {@inheritDoc} |
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225 | */ |
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226 | public function askAndHideAnswer($question) |
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274 | |||
275 | /** |
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276 | * (non-PHPdoc) |
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277 | * @see Webcreate\Conveyor\IO.IOInterface::setIndention() |
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278 | */ |
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279 | public function setIndention($indent) |
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283 | |||
284 | /** |
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285 | * (non-PHPdoc) |
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286 | * @see Webcreate\Conveyor\IO.IOInterface::increaseIndention() |
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287 | */ |
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288 | public function increaseIndention($indent) |
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292 | |||
293 | /** |
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294 | * (non-PHPdoc) |
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295 | * @see Webcreate\Conveyor\IO.IOInterface::decreaseIndention() |
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296 | */ |
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297 | public function decreaseIndention($indent) |
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305 | |||
306 | /** |
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307 | * (non-PHPdoc) |
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308 | * @see Webcreate\Conveyor\IO.IOInterface::getIndention() |
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309 | */ |
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310 | public function getIndention() |
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314 | |||
315 | public function renderException($e) |
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327 | |||
328 | /** |
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329 | * @param string $prefix |
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330 | * @return mixed |
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331 | */ |
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332 | public function setPrefix($prefix) |
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336 | } |
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337 |