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 API 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 API, and based on these observations, apply Extract Interface, too.
1 | <?php |
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18 | class API |
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19 | { |
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20 | protected static $defaultClientOptions = array( |
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21 | 'version' => ExchangeWebServices::VERSION_2010 |
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22 | ); |
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23 | |||
24 | 34 | public function __construct(ExchangeWebServices $client = null) |
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30 | |||
31 | /** |
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32 | * @return Type\EmailAddressType |
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33 | */ |
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34 | 26 | public function getPrimarySmtpMailbox() |
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38 | |||
39 | /** |
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40 | * Storing the API client |
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41 | * @var ExchangeWebServices |
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42 | */ |
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43 | private $client; |
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44 | |||
45 | /** |
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46 | * Get a calendar item |
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47 | * |
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48 | * @param string $name |
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49 | * @return CalendarAPI |
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50 | */ |
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51 | 6 | public function getCalendar($name = null) |
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59 | |||
60 | /** |
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61 | * @param string $folderName |
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62 | * @return MailAPI |
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63 | */ |
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64 | 6 | public function getMailbox($folderName = null) |
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72 | |||
73 | /** |
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74 | * Set the API client |
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75 | * |
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76 | * @param ExchangeWebServices $client |
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77 | * @return $this |
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78 | */ |
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79 | 34 | public function setClient($client) |
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85 | |||
86 | /** |
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87 | * Get the API client |
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88 | * |
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89 | * @return ExchangeWebServices |
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90 | */ |
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91 | 33 | public function getClient() |
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95 | |||
96 | 33 | public static function withUsernameAndPassword($server, $username, $password, $options = []) |
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105 | |||
106 | 1 | public static function withCallbackToken($server, $token, $options = []) |
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114 | |||
115 | 1 | public function getPrimarySmptEmailAddress() |
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123 | |||
124 | 1 | public function setPrimarySmtpEmailAddress($emailAddress) |
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130 | |||
131 | /** |
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132 | * Create items through the API client |
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133 | * |
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134 | * @param $items |
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135 | * @param array $options |
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136 | * @return Type |
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137 | */ |
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138 | 16 | public function createItems($items, $options = array()) |
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155 | |||
156 | 4 | public function updateItems($items, $options = array()) |
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179 | |||
180 | 1 | public function createCalendars($names, Type\FolderIdType $parentFolder = null, $options = array()) |
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207 | |||
208 | 3 | public function createFolders($names, Type\FolderIdType $parentFolder, $options = array()) |
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232 | |||
233 | /** |
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234 | * @deprecated Please use API::deleteFolders() instead |
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235 | * |
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236 | * @param Type\FolderIdType $folderId |
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237 | * @param array $options |
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238 | * @return Type |
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239 | */ |
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240 | public function deleteFolder(Type\FolderIdType $folderId, $options = array()) |
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241 | { |
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242 | return $this->deleteFolders($folderId, $options); |
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243 | } |
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244 | |||
245 | 4 | public function deleteFolders($folders, $options = array()) |
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265 | |||
266 | public function moveItem(Type\ItemIdType $itemId, Type\FolderIdType $folderId, $options = array()) |
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277 | |||
278 | /** |
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279 | * @param $items Type\ItemIdType|Type\ItemIdType[] |
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280 | * @param array $options |
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281 | * @return bool |
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282 | */ |
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283 | 16 | public function deleteItems($items, $options = array()) |
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307 | |||
308 | /** |
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309 | * @param $identifier |
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310 | * @return Type\BaseFolderType |
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311 | */ |
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312 | 25 | public function getFolder($identifier) |
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326 | |||
327 | /** |
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328 | * Get a folder by it's distinguishedId |
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329 | * |
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330 | * @param string $distinguishedId |
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331 | * @return Type\BaseFolderType |
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332 | */ |
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333 | 25 | public function getFolderByDistinguishedId($distinguishedId) |
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342 | |||
343 | /** |
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344 | * @param $folderId |
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345 | * @return Type\BaseFolderType |
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346 | */ |
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347 | 4 | public function getFolderByFolderId($folderId) |
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353 | |||
354 | /** |
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355 | * @param string|Type\FolderIdType $parentFolderId |
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356 | * @param array $options |
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357 | * @return Type\BaseFolderType[] |
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358 | */ |
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359 | 24 | View Code Duplication | public function getChildrenFolders($parentFolderId = 'root', $options = array()) |
382 | |||
383 | /** |
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384 | * @param string $folderName |
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385 | * @param string|Type\FolderIdType $parentFolderId |
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386 | * @param array $options |
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387 | * @return bool|Type\BaseFolderType |
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388 | */ |
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389 | 24 | public function getFolderByDisplayName($folderName, $parentFolderId = 'root', $options = array()) |
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401 | |||
402 | /** |
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403 | * @param $itemId array|Type\ItemIdType |
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404 | * @param array $options |
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405 | * @return Type |
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406 | */ |
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407 | 5 | View Code Duplication | public function getItem($itemId, $options = array()) |
422 | |||
423 | /** |
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424 | * Get a list of sync changes on a folder |
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425 | * |
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426 | * @param Type\FolderIdType $folderId |
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427 | * @param null $syncState |
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428 | * @param array $options |
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429 | * @return SyncFolderItemsResponseMessageType |
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430 | */ |
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431 | 2 | public function listItemChanges($folderId, $syncState = null, $options = array()) |
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452 | |||
453 | public function getServerTimezones($timezoneIDs = array(), $fullTimezoneData = false) |
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472 | |||
473 | /** |
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474 | * @param Type\ItemIdType $itemId |
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475 | * @param $fromType |
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476 | * @param $destinationType |
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477 | * @param $mailbox |
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478 | * |
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479 | * @return Type\ItemIdType |
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480 | */ |
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481 | public function convertIdFormat(Type\ItemIdType $itemId, $fromType, $destinationType, $mailbox) |
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498 | |||
499 | /** |
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500 | * @param Type\FindItemParentType|Type\FindFolderParentType $result |
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501 | * |
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502 | * @return Type\FindItemParentType|Type\FindFolderParentType |
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503 | */ |
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504 | 2 | public function getNextPage($result) |
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522 | |||
523 | /** |
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524 | * @param Type\FolderIdType $folderId |
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525 | * @param string $deleteType |
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526 | * @param bool $deleteSubFolders |
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527 | * @param array $options |
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528 | * @return EmptyFolderResponseType |
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529 | */ |
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530 | public function emptyFolder( |
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546 | } |
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547 |