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 MagentoHelper 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 MagentoHelper, and based on these observations, apply Extract Interface, too.
1 | <?php |
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18 | class MagentoHelper extends AbstractHelper |
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19 | { |
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20 | /** |
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21 | * @var string |
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22 | */ |
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23 | protected $_magentoRootFolder = null; |
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24 | |||
25 | /** |
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26 | * @var int |
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27 | */ |
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28 | protected $_magentoMajorVersion = \N98\Magento\Application::MAGENTO_MAJOR_VERSION_1; |
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29 | |||
30 | /** |
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31 | * @var bool |
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32 | */ |
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33 | protected $_magentoEnterprise = false; |
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34 | |||
35 | /** |
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36 | * @var bool |
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37 | */ |
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38 | protected $_magerunStopFileFound = false; |
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39 | |||
40 | /** |
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41 | * @var string |
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42 | */ |
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43 | protected $_magerunStopFileFolder = null; |
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44 | |||
45 | /** |
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46 | * @var InputInterface |
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47 | */ |
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48 | protected $input; |
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49 | |||
50 | /** |
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51 | * @var OutputInterface |
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52 | */ |
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53 | protected $output; |
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54 | |||
55 | /** |
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56 | * @var string |
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57 | */ |
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58 | protected $_customConfigFilename = 'n98-magerun.yaml'; |
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59 | |||
60 | /** |
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61 | * Returns the canonical name of this helper. |
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62 | * |
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63 | * @return string The canonical name |
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64 | * |
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65 | * @api |
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66 | */ |
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67 | public function getName() |
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71 | |||
72 | /** |
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73 | * @param InputInterface $input |
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74 | * @param OutputInterface $output |
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75 | */ |
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76 | public function __construct(InputInterface $input = null, OutputInterface $output = null) |
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89 | |||
90 | /** |
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91 | * Start Magento detection |
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92 | * |
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93 | * @param string $folder |
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94 | * @param array $subFolders [optional] sub-folders to check |
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95 | * @return bool |
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96 | */ |
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97 | public function detect($folder, array $subFolders = array()) |
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117 | |||
118 | /** |
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119 | * @return string |
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120 | */ |
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121 | public function getRootFolder() |
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125 | |||
126 | public function getEdition() |
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130 | |||
131 | /** |
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132 | * @return bool |
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133 | */ |
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134 | public function isEnterpriseEdition() |
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138 | |||
139 | /** |
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140 | * @return int |
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141 | */ |
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142 | public function getMajorVersion() |
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146 | |||
147 | /** |
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148 | * @return boolean |
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149 | */ |
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150 | public function isMagerunStopFileFound() |
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154 | |||
155 | /** |
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156 | * @return string |
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157 | */ |
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158 | public function getMagerunStopFileFolder() |
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162 | |||
163 | /** |
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164 | * @param string $folder |
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165 | * |
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166 | * @return array |
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167 | */ |
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168 | protected function splitPathFolders($folder) |
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182 | |||
183 | /** |
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184 | * Check for modman file and .basedir |
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185 | * |
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186 | * @param array $folders |
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187 | * |
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188 | * @return array |
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189 | */ |
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190 | protected function checkModman(array $folders) |
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231 | |||
232 | /** |
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233 | * Check for magerun stop-file |
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234 | * |
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235 | * @param array $folders |
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236 | * |
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237 | * @return array |
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238 | */ |
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239 | protected function checkMagerunFile(array $folders) |
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281 | |||
282 | /** |
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283 | * @param string $searchFolder |
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284 | * |
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285 | * @return bool |
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286 | */ |
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287 | protected function _search($searchFolder) |
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344 | } |
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345 |
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.