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, $options = array()) |
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179 | |||
180 | 1 | View Code Duplication | public function createCalendars($names, Type\FolderIdType $parentFolder = null, $options = array()) |
207 | |||
208 | View Code Duplication | public function createContactsFolder($names, Type\FolderIdType $parentFolder = null, $options = array()) |
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235 | |||
236 | 3 | public function createFolders($names, Type\FolderIdType $parentFolder, $options = array()) |
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260 | |||
261 | /** |
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262 | * @deprecated Please use API::deleteFolders() instead |
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263 | * |
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264 | * @param Type\FolderIdType $folderId |
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265 | * @param array $options |
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266 | * @return Type |
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267 | */ |
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268 | 3 | public function deleteFolder(Type\FolderIdType $folderId, $options = array()) |
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272 | |||
273 | 4 | public function deleteFolders($folders, $options = array()) |
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293 | |||
294 | public function moveItem(Type\ItemIdType $itemId, Type\FolderIdType $folderId, $options = array()) |
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305 | |||
306 | /** |
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307 | * @param $items Type\ItemIdType|Type\ItemIdType[] |
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308 | * @param array $options |
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309 | * @return bool |
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310 | */ |
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311 | 16 | public function deleteItems($items, $options = array()) |
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335 | |||
336 | /** |
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337 | * @param $identifier |
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338 | * @return Type\BaseFolderType |
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339 | */ |
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340 | 25 | public function getFolder($identifier) |
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354 | |||
355 | /** |
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356 | * Get a folder by it's distinguishedId |
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357 | * |
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358 | * @param string $distinguishedId |
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359 | * @return Type\BaseFolderType |
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360 | */ |
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361 | 25 | public function getFolderByDistinguishedId($distinguishedId) |
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370 | |||
371 | /** |
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372 | * @param $folderId |
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373 | * @return Type\BaseFolderType |
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374 | */ |
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375 | 4 | public function getFolderByFolderId($folderId) |
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381 | |||
382 | /** |
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383 | * @param string|Type\FolderIdType $parentFolderId |
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384 | * @param array $options |
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385 | * @return Type\BaseFolderType[] |
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386 | */ |
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387 | 24 | View Code Duplication | public function getChildrenFolders($parentFolderId = 'root', $options = array()) |
410 | |||
411 | /** |
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412 | * @param string $folderName |
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413 | * @param string|Type\FolderIdType $parentFolderId |
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414 | * @param array $options |
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415 | * @return bool|Type\BaseFolderType |
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416 | */ |
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417 | 24 | public function getFolderByDisplayName($folderName, $parentFolderId = 'root', $options = array()) |
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429 | |||
430 | /** |
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431 | * @param $itemId array|Type\ItemIdType |
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432 | * @param array $options |
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433 | * @return Type |
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434 | */ |
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435 | 5 | View Code Duplication | public function getItem($itemId, $options = array()) |
450 | |||
451 | /** |
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452 | * Get a list of sync changes on a folder |
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453 | * |
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454 | * @param Type\FolderIdType $folderId |
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455 | * @param null $syncState |
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456 | * @param array $options |
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457 | * @return SyncFolderItemsResponseMessageType |
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458 | */ |
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459 | 2 | public function listItemChanges($folderId, $syncState = null, $options = array()) |
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480 | |||
481 | public function getServerTimezones($timezoneIDs = array(), $fullTimezoneData = false) |
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500 | |||
501 | /** |
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502 | * @param Type\ItemIdType $itemId |
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503 | * @param $fromType |
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504 | * @param $destinationType |
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505 | * @param $mailbox |
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506 | * |
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507 | * @return Type\ItemIdType |
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508 | */ |
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509 | public function convertIdFormat(Type\ItemIdType $itemId, $fromType, $destinationType, $mailbox) |
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526 | |||
527 | /** |
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528 | * @param Type\FindItemParentType|Type\FindFolderParentType $result |
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529 | * |
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530 | * @return Type\FindItemParentType|Type\FindFolderParentType |
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531 | */ |
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532 | 2 | public function getNextPage($result) |
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550 | |||
551 | /** |
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552 | * @param Type\FolderIdType $folderId |
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553 | * @param string $deleteType |
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554 | * @param bool $deleteSubFolders |
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555 | * @param array $options |
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556 | * @return EmptyFolderResponseType |
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557 | */ |
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558 | public function emptyFolder( |
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574 | } |
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575 |
This error could be the result of:
1. Missing dependencies
PHP Analyzer uses your
composer.json
file (if available) to determine the dependencies of your project and to determine all the available classes and functions. It expects thecomposer.json
to be in the root folder of your repository.Are you sure this class is defined by one of your dependencies, or did you maybe not list a dependency in either the
require
orrequire-dev
section?2. Missing use statement
PHP does not complain about undefined classes in
ìnstanceof
checks. For example, the following PHP code will work perfectly fine:If you have not tested against this specific condition, such errors might go unnoticed.