| 1 |  |  | <?php | 
            
                                                                                                            
                            
            
                                    
            
            
                | 2 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 3 |  |  | namespace Kaliop\IdentityManagementBundle\Security\User; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 4 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 5 |  |  | use Kaliop\IdentityManagementBundle\Adapter\ClientInterface; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 6 |  |  | use eZ\Publish\API\Repository\Repository; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 7 |  |  | use eZ\Publish\API\Repository\Values\Content\Query; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 8 |  |  | use eZ\Publish\API\Repository\Values\Content\Query\Criterion; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 9 |  |  | use eZ\Publish\API\Repository\Values\User\User; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 10 |  |  | use eZ\Publish\API\Repository\Exceptions\NotFoundException; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 11 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 12 |  |  | /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 13 |  |  |  * A 'generic' Remote user handler class. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 14 |  |  |  * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 15 |  |  |  * For the common cases, you will need to implement only getGroupsFromProfile() and setFieldValuesFromProfile(). | 
            
                                                                                                            
                            
            
                                    
            
            
                | 16 |  |  |  * But you can subclass more methods for more complex scenarios :-) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 17 |  |  |  * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 18 |  |  |  * It handles | 
            
                                                                                                            
                            
            
                                    
            
            
                | 19 |  |  |  * - multiple user groups assignments per user | 
            
                                                                                                            
                            
            
                                    
            
            
                | 20 |  |  |  * - automatic update of the ez user when its ldap profile has changed compared to the stored one | 
            
                                                                                                            
                            
            
                                    
            
            
                | 21 |  |  |  */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 22 |  |  | abstract class RemoteUserHandler implements RemoteUserHandlerInterface | 
            
                                                                                                            
                            
            
                                    
            
            
                | 23 |  |  | { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 24 |  |  |     protected $client; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 25 |  |  |     protected $repository; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 26 |  |  |     protected $settings; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 27 |  |  |     protected $tempFiles = array(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 28 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 29 |  |  |     protected $remoteIdPrefix = 'ldap_md5:'; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 30 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 31 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 32 |  |  |      * @param ClientInterface $client Note: this is currently unused and left in for BC | 
            
                                                                                                            
                            
            
                                    
            
            
                | 33 |  |  |      * @param Repository $repository | 
            
                                                                                                            
                            
            
                                    
            
            
                | 34 |  |  |      * @param array $settings | 
            
                                                                                                            
                            
            
                                    
            
            
                | 35 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 36 |  |  |     public function __construct(ClientInterface $client, Repository $repository, array $settings) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 37 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 38 |  |  |         $this->client = $client; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 39 |  |  |         $this->repository = $repository; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 40 |  |  |         $this->settings = $settings; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 41 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 42 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 43 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 44 |  |  |      * Returns the API user corresponding to a given remoteUser (if it exists), or false. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 45 |  |  |      * @see \eZ\Publish\Core\MVC\Symfony\Security\User\Provider::loadUserByUsername() | 
            
                                                                                                            
                            
            
                                    
            
            
                | 46 |  |  |      * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 47 |  |  |      * @param RemoteUser $remoteUser | 
            
                                                                                                            
                            
            
                                    
            
            
                | 48 |  |  |      * @return \eZ\Publish\API\Repository\Values\User\User|false | 
            
                                                                                                            
                            
            
                                    
            
            
                | 49 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 50 |  |  |     public function loadAPIUserByRemoteUser(RemoteUser $remoteUser) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 51 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 52 |  |  |         try | 
            
                                                                                                            
                            
            
                                    
            
            
                | 53 |  |  |         { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 54 |  |  |             return $this->repository->getUserService()->loadUserByLogin($remoteUser->getUsername()); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 55 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 56 |  |  |         catch (NotFoundException $e) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 57 |  |  |         { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 58 |  |  |             return false; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 59 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 60 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 61 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 62 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 63 |  |  |      * @param RemoteUser $user | 
            
                                                                                                            
                            
            
                                    
            
            
                | 64 |  |  |      * @return \eZ\Publish\API\Repository\Values\User\User | 
            
                                                                                                            
                            
            
                                    
            
            
                | 65 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 66 |  |  |     public function createRepoUser(RemoteUser $user) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 67 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 68 |  |  |         return $this->repository->sudo( | 
                            
                    |  |  |  | 
                                                                                        
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                | 69 |  |  |             function() use ($user) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 70 |  |  |             { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 71 |  |  |                 /// @todo support creating users using a different user account | 
            
                                                                                                            
                            
            
                                    
            
            
                | 72 |  |  |                 //$this->repository->setCurrentUser($userService->loadUser($this->settings['user_creator'])); | 
                            
                    |  |  |  | 
                                                                                        
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                | 73 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 74 |  |  |                 $userService = $this->repository->getUserService(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 75 |  |  |                 $profile = $user->getProfile(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 76 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 77 |  |  |                 // the user passwords we do not store locally | 
            
                                                                                                            
                            
            
                                    
            
            
                | 78 |  |  |                 $userCreateStruct = $userService->newUserCreateStruct( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 79 |  |  |                     // is 128 bytes enough for everyone? (pun intended) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 80 |  |  |                     $user->getUsername(), $user->getEmail(), bin2hex(random_bytes(128)), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 81 |  |  |                     $this->settings['default_content_language'], | 
            
                                                                                                            
                            
            
                                    
            
            
                | 82 |  |  |                     $this->repository->getContentTypeService()->loadContentTypeByIdentifier($this->settings['user_contenttype']) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 83 |  |  |                 ); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 84 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 85 |  |  |                 $this->setFieldValuesFromProfile($profile, $userCreateStruct); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 86 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 87 |  |  |                 // store an md5 of the profile, to allow efficient checking of the need for updates | 
            
                                                                                                            
                            
            
                                    
            
            
                | 88 |  |  |                 $userCreateStruct->remoteId = $this->getRemoteIdFromProfile($profile); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 89 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 90 |  |  |                 /// @todo test/document what happens when we get an empty array... | 
            
                                                                                                            
                            
            
                                    
            
            
                | 91 |  |  |                 $userGroups = $this->getGroupsFromProfile($profile); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 92 |  |  |                 $repoUser = $userService->createUser($userCreateStruct, $userGroups); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 93 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 94 |  |  |                 $this->cleanUpAfterUserCreation(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 95 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 96 |  |  |                 return $repoUser; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 97 |  |  |             } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 98 |  |  |         ); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 99 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 100 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 101 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 102 |  |  |      * @param RemoteUser $user | 
            
                                                                                                            
                            
            
                                    
            
            
                | 103 |  |  |      * @param $eZUser (is this an eZ\Publish\API\Repository\Values\User\User ?) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 104 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 105 |  |  |     public function updateRepoUser(RemoteUser $user, $eZUser) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 106 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 107 |  |  |         if ($this->localUserNeedsUpdating($user, $eZUser)) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 108 |  |  |             return $this->repository->sudo( | 
                            
                    |  |  |  | 
                                                                                        
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                | 109 |  |  |                 function() use ($user, $eZUser) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 110 |  |  |                 { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 111 |  |  |                     $userService = $this->repository->getUserService(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 112 |  |  |                     $contentService = $this->repository->getContentService(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 113 |  |  |                     $profile = $user->getProfile(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 114 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 115 |  |  |                     $userUpdateStruct = $userService->newUserUpdateStruct(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 116 |  |  |                     $contentUpdateStruct = $contentService->newContentUpdateStruct(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 117 |  |  |                     $this->setFieldValuesFromProfile($profile, $contentUpdateStruct); | 
                            
                    |  |  |  | 
                                                                                        
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                | 118 |  |  |                     $userUpdateStruct->contentUpdateStruct = $contentUpdateStruct; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 119 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 120 |  |  |                     // update the stored md5 of the profile, to allow efficient checking of the need for updates in the future | 
            
                                                                                                            
                            
            
                                    
            
            
                | 121 |  |  |                     $contentMetadataUpdateStruct = $contentService->newContentMetadataUpdateStruct(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 122 |  |  |                     $contentMetadataUpdateStruct->remoteId = $this->getRemoteIdFromProfile($profile); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 123 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 124 |  |  |                     // we use a transaction since there are multiple db operations | 
            
                                                                                                            
                            
            
                                    
            
            
                | 125 |  |  |                     try { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 126 |  |  |                         $this->repository->beginTransaction(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 127 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 128 |  |  |                         $repoUser = $userService->updateUser($eZUser, $userUpdateStruct); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 129 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 130 |  |  |                         $content = $contentService->updateContentMetadata($repoUser->contentInfo, $contentMetadataUpdateStruct); | 
                            
                    |  |  |  | 
                                                                                        
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                | 131 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 132 |  |  |                         // fix user groups assignments: first add new ones, then remove unused current ones (we can not hit 0 groups during the updating :-) ) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 133 |  |  |                         /// @todo test/document what happens when we get an empty array... | 
            
                                                                                                            
                            
            
                                    
            
            
                | 134 |  |  |                         $newUserGroups = $this->getGroupsFromProfile($profile); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 135 |  |  |                         $currentUserGroups = $userService->loadUserGroupsOfUser($eZUser); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 136 |  |  |                         $groupsToRemove = array(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 137 |  |  |                         foreach($currentUserGroups as $currentUserGroup) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 138 |  |  |                             if (!array_key_exists($currentUserGroup->id, $newUserGroups)) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 139 |  |  |                                 $groupsToRemove[] = $currentUserGroup; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 140 |  |  |                             } else { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 141 |  |  |                                 unset($newUserGroups[$currentUserGroup->id]); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 142 |  |  |                             } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 143 |  |  |                         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 144 |  |  |                         foreach ($newUserGroups as $newUserGroup) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 145 |  |  |                             $userService->assignUserToUserGroup($repoUser, $newUserGroup); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 146 |  |  |                         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 147 |  |  |                         foreach ($groupsToRemove as $groupToRemove) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 148 |  |  |                             $userService->unAssignUserFromUserGroup($repoUser, $groupToRemove); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 149 |  |  |                         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 150 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 151 |  |  |                         $this->repository->commit(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 152 |  |  |                     } catch (\Exception $e) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 153 |  |  |                         $this->repository->rollback(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 154 |  |  |                         $this->cleanUpAfterUserUpdate(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 155 |  |  |                         throw $e; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 156 |  |  |                     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 157 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 158 |  |  |                     $this->cleanUpAfterUserUpdate(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 159 |  |  |                     return $repoUser; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 160 |  |  |                 } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 161 |  |  |             ); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 162 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 163 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 164 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 165 |  |  |     protected function getRemoteIdFromProfile($profile) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 166 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 167 |  |  |         return $this->remoteIdPrefix . $this->profileHash($profile); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 168 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 169 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 170 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 171 |  |  |      * Load (and possibly create on the fly) all the user groups needed for this user, based on his profile. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 172 |  |  |      * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 173 |  |  |      * @param $profile | 
            
                                                                                                            
                            
            
                                    
            
            
                | 174 |  |  |      * @return \eZ\Publish\API\Repository\Values\User\UserGroup[] indexed by group id | 
            
                                                                                                            
                                                                
            
                                    
            
            
                | 175 |  |  |      */ | 
            
                                                                        
                            
            
                                    
            
            
                | 176 |  |  |     abstract protected function getGroupsFromProfile($profile); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 177 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 178 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 179 |  |  |      * @param $profile | 
            
                                                                                                            
                            
            
                                    
            
            
                | 180 |  |  |      * @param \eZ\Publish\API\Repository\Values\Content\ContentCreateStruct $userCreateStruct | 
            
                                                                                                            
                            
            
                                    
            
            
                | 181 |  |  |      * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 182 |  |  |      * @todo allow to define simple field mappings in settings | 
            
                                                                                                            
                            
            
                                    
            
            
                | 183 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 184 |  |  |     abstract protected function setFieldValuesFromProfile($profile, $userCreateStruct); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 185 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 186 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 187 |  |  |      * Checks if the local user profile needs updating compared to the remote user profile | 
            
                                                                                                            
                            
            
                                    
            
            
                | 188 |  |  |      * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 189 |  |  |      * @param RemoteUser $remoteUser | 
            
                                                                                                            
                            
            
                                    
            
            
                | 190 |  |  |      * @param $eZUser (is this an eZ\Publish\API\Repository\Values\User\User ?) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 191 |  |  |      * @return bool | 
            
                                                                                                            
                            
            
                                    
            
            
                | 192 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 193 |  |  |     protected function localUserNeedsUpdating(RemoteUser $remoteUser, $eZUser) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 194 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 195 |  |  |         return $this->getRemoteIdFromProfile($remoteUser->getProfile()) !== $eZUser->contentInfo->remoteId; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 196 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 197 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 198 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 199 |  |  |      * Generates a unique hash for the user profile | 
            
                                                                                                            
                            
            
                                    
            
            
                | 200 |  |  |      * @param $profile | 
            
                                                                                                            
                            
            
                                    
            
            
                | 201 |  |  |      * @return string | 
            
                                                                                                            
                            
            
                                    
            
            
                | 202 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 203 |  |  |     protected function profileHash($profile) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 204 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 205 |  |  |         return md5(var_export($profile, true)); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 206 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 207 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 208 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 209 |  |  |      * A helper for importing data into image/file fields | 
            
                                                                                                            
                            
            
                                    
            
            
                | 210 |  |  |      * @param string $data | 
            
                                                                                                            
                            
            
                                    
            
            
                | 211 |  |  |      * @param string $prefix | 
            
                                                                                                            
                            
            
                                    
            
            
                | 212 |  |  |      * @return string | 
            
                                                                                                            
                            
            
                                    
            
            
                | 213 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 214 |  |  |     protected function createTempFile($data, $prefix='') | 
            
                                                                                                            
                            
            
                                    
            
            
                | 215 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 216 |  |  |         $imageFileName = trim(tempnam(sys_get_temp_dir(), $prefix), '.'); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 217 |  |  |         file_put_contents($imageFileName, $data); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 218 |  |  |         $this->tempFiles[] = $imageFileName; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 219 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 220 |  |  |         return $imageFileName; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 221 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 222 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 223 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 224 |  |  |      * Needed to clean up after createTempFile() | 
            
                                                                                                            
                            
            
                                    
            
            
                | 225 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 226 |  |  |     protected function cleanUpAfterUserCreation() | 
            
                                                                                                            
                            
            
                                    
            
            
                | 227 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 228 |  |  |         foreach ($this->tempFiles as $fileName) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 229 |  |  |             if (is_file( $fileName)) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 230 |  |  |                 unlink($fileName); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 231 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 232 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 233 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 234 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 235 |  |  |      * Needed to clean up after createTempFile() | 
            
                                                                                                            
                            
            
                                    
            
            
                | 236 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 237 |  |  |     protected function cleanUpAfterUserUpdate() | 
            
                                                                                                            
                            
            
                                    
            
            
                | 238 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 239 |  |  |         foreach ($this->tempFiles as $fileName) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 240 |  |  |             if (is_file( $fileName)) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 241 |  |  |                 unlink($fileName); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 242 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 243 |  |  |     } | 
            
                                                                                                            
                                                                
            
                                    
            
            
                | 244 |  |  | } | 
            
                                                        
            
                                    
            
            
                | 245 |  |  |  | 
            
                        
Let’s take a look at an example:
In the above example, the authenticate() method works fine as long as you just pass instances of MyUser. However, if you now also want to pass a different implementation of User which does not have a getDisplayName() method, the code will break.
Available Fixes
Change the type-hint for the parameter:
Add an additional type-check:
Add the method to the interface: