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<?php |
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/** |
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Copyright (C) 2018 KANOUN Salim |
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This program is free software; you can redistribute it and/or modify |
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it under the terms of the Affero GNU General Public v.3 License as published by |
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the Free Software Foundation; |
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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Affero GNU General Public Public for more details. |
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You should have received a copy of the Affero GNU General Public Public along |
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with this program; if not, write to the Free Software Foundation, Inc., |
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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/** |
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* Check access for each call of the DICOMWeb Protocol (for OHIF / Viewer integration) |
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* @author salim |
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* |
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*/ |
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class Dicom_Web_Access { |
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private $isStudyMetadataRequested; |
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private $isSerieRequested; |
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private $requestedURI; |
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private $userObject; |
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private $userRole; |
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private $linkpdo; |
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public function __construct(string $requestedURI, User $userObject, string $userRole, PDO $linkpdo){ |
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$this->requestedURI=$requestedURI; |
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$this->userObject=$userObject; |
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$this->userRole=$userRole; |
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$this->linkpdo=$linkpdo; |
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if( $this->endsWith($requestedURI, "/series") ) $this->isStudyMetadataRequested=true; |
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else $this->isSerieRequested=true; |
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} |
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/** |
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* Output the decision for access allowance |
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* @return boolean |
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*/ |
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public function getDecision(){ |
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//Get related visit ID of the called ressource |
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$id_visit=$this->getRelatedVisitID($this->getUID()); |
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//Return test of acess allowance |
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return $this->isAccessAllowedForUser($id_visit); |
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} |
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/** |
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* Isolate the called Study or Series Instance UID |
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* @return string |
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*/ |
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private function getUID(){ |
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if($this->isSerieRequested) $level="series"; |
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else if($this->isStudyMetadataRequested) $level="studies"; |
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$studySubString=strstr($this->requestedURI, "/".$level."/"); |
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$studySubString=str_replace("/".$level."/", "", $studySubString); |
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$endStudyUIDPosition=strpos($studySubString, "/"); |
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$studyUID=substr($studySubString, 0, $endStudyUIDPosition); |
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return $studyUID; |
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} |
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/** |
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* Check if called ressource is allowed for current user |
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* @param string $uid |
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* @return string |
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*/ |
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private function getRelatedVisitID(string $uid){ |
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if($this->isSerieRequested) { |
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$seriesObject=Series_Details::getSerieObjectByUID($uid, $this->linkpdo); |
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if($this->userRole != User::SUPERVISOR && $seriesObject->deleted) throw new Exception('Deleted Series'); |
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$studyObject=$seriesObject->studyDetailsObject; |
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} else if($this->isStudyMetadataRequested) { |
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$studyObject=Study_Details::getStudyObjectByUID($uid, $this->linkpdo); |
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if($this->userRole != User::SUPERVISOR && $studyObject->deleted) throw new Exception('Deleted Study'); |
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} |
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return $studyObject->idVisit; |
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} |
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/** |
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* Check that visit is granter for the calling user (still awaiting review or still awaiting QC) |
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* @param string $id_visit |
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* @return boolean |
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*/ |
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private function isAccessAllowedForUser(string $id_visit){ |
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$visitObject=new Visit($id_visit, $this->linkpdo); |
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//Check Visit Availability of the calling user |
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if($this->userRole == User::REVIEWER || ($this->userRole == User::INVESTIGATOR && $visitObject->uploadStatus==Visit::DONE) ) { |
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//Check that visit is in patient that is still awaiting for some reviews |
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$visitCheck=$this->userObject->isVisitAllowed($id_visit, $this->userRole); |
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}else if($this->userRole == User::CONTROLLER){ |
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//Check that QC status still require an action from Controller |
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if(in_array($visitObject->stateQualityControl, array(Visit::QC_WAIT_DEFINITVE_CONCLUSION, Visit::QC_NOT_DONE)) ){ |
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$visitCheck=$this->userObject->isVisitAllowed($id_visit, $this->userRole); |
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} |
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}else if($this->userRole == User::SUPERVISOR){ |
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$visitCheck=$this->userObject->isVisitAllowed($id_visit, $this->userRole); |
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}else { |
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//Other roles can't have access to images |
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$visitCheck=false; |
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} |
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return $visitCheck; |
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} |
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private function endsWith($haystack, $needle) { |
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return substr_compare($haystack, $needle, -strlen($needle)) === 0; |
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} |
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} |
salimkanoun /
GaelO
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