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<?php |
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/* For license terms, see /license.txt */ |
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use Chamilo\PluginBundle\Entity\LtiProvider\Platform; |
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use Chamilo\PluginBundle\Entity\LtiProvider\PlatformKey; |
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use Doctrine\ORM\OptimisticLockException; |
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use Doctrine\ORM\Tools\SchemaTool; |
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/** |
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* Description of LtiProvider. |
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* |
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* @author Christian Beeznest <[email protected]> |
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*/ |
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class LtiProviderPlugin extends Plugin |
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{ |
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const TABLE_PLATFORM = 'plugin_lti_provider_platform'; |
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public $isAdminPlugin = true; |
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protected function __construct() |
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{ |
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$version = '1.0'; |
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$author = 'Christian Beeznest'; |
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$message = Display::return_message($this->get_lang('Description')); |
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if ($this->areTablesCreated()) { |
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$publicKey = $this->getPublicKey(); |
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$pkHtml = '<div class="form-group"> |
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<label for="lti_provider_public_key" class="col-sm-2 control-label">' |
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.$this->get_lang('PublicKey').'</label> |
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<div class="col-sm-8"> |
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<pre>'.$publicKey.'</pre> |
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</div> |
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<div class="col-sm-2"></div> |
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</div>'; |
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} else { |
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$pkHtml = $this->get_lang('GenerateKeyPairInfo'); |
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} |
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$settings = [ |
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$message => 'html', |
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'name' => 'text', |
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'launch_url' => 'text', |
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'login_url' => 'text', |
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'redirect_url' => 'text', |
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$pkHtml => 'html', |
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'enabled' => 'boolean', |
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]; |
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parent::__construct($version, $author, $settings); |
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} |
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/** |
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* Get a selectbox with quizzes in courses , used for a tool provider. |
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* |
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* @param null $issuer |
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* |
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* @return string |
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*/ |
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public function getQuizzesSelect($issuer = null) |
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{ |
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$courses = CourseManager::get_courses_list(); |
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$toolProvider = $this->getToolProvider($issuer); |
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$htmlcontent = '<div class="form-group"> |
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<label for="lti_provider_create_platform_kid" class="col-sm-2 control-label">'.$this->get_lang('ToolProvider').'</label> |
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<div class="col-sm-8"> |
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<select name="tool_provider">'; |
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$htmlcontent .= '<option value="">-- '.$this->get_lang('SelectOneActivity').' --</option>'; |
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foreach ($courses as $course) { |
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$courseInfo = api_get_course_info($course['code']); |
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$optgroupLabel = "{$course['title']} : ".get_lang('Quizzes'); |
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$htmlcontent .= '<optgroup label="'.$optgroupLabel.'">'; |
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$exerciseList = ExerciseLib::get_all_exercises_for_course_id( |
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$courseInfo, |
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0, |
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$course['id'], |
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false |
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); |
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foreach ($exerciseList as $key => $exercise) { |
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$selectValue = "{$course['code']}@@quiz-{$exercise['iid']}"; |
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$htmlcontent .= '<option value="'.$selectValue.'" '.($toolProvider == $selectValue ? ' selected="selected"' : '').'>'.Security::remove_XSS($exercise['title']).'</option>'; |
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} |
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$htmlcontent .= '</optgroup>'; |
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} |
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$htmlcontent .= "</select>"; |
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$htmlcontent .= ' </div> |
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<div class="col-sm-2"></div> |
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</div>'; |
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return $htmlcontent; |
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} |
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/** |
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* Get the public key. |
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*/ |
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public function getPublicKey(): string |
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{ |
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$publicKey = ''; |
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$platformKey = Database::getManager() |
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->getRepository('ChamiloPluginBundle:LtiProvider\PlatformKey') |
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->findOneBy([]); |
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if ($platformKey) { |
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$publicKey = $platformKey->getPublicKey(); |
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} |
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return $publicKey; |
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} |
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/** |
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* Get the tool provider. |
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*/ |
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public function getToolProvider($issuer): string |
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{ |
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$toolProvider = ''; |
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$platform = Database::getManager() |
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->getRepository('ChamiloPluginBundle:LtiProvider\Platform') |
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->findOneBy(['issuer' => $issuer]); |
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if ($platform) { |
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$toolProvider = $platform->getToolProvider(); |
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} |
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return $toolProvider; |
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} |
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public function getToolProviderVars($issuer): array |
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{ |
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$toolProvider = $this->getToolProvider($issuer); |
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list($courseCode, $tool) = explode('@@', $toolProvider); |
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list($toolName, $toolId) = explode('-', $tool); |
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$vars = ['courseCode' => $courseCode, 'toolName' => $toolName, 'toolId' => $toolId]; |
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return $vars; |
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} |
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/** |
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* Get the class instance. |
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* |
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* @staticvar LtiProviderPlugin $result |
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*/ |
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public static function create(): LtiProviderPlugin |
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{ |
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static $result = null; |
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return $result ?: $result = new self(); |
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} |
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/** |
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* Check whether the current user is a teacher in this context. |
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*/ |
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public static function isInstructor() |
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{ |
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api_is_allowed_to_edit(false, true); |
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} |
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/** |
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* Get the plugin directory name. |
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*/ |
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public function get_name(): string |
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{ |
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return 'lti_provider'; |
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} |
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/** |
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* Install the plugin. Set the database up. |
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* |
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* @throws \Doctrine\ORM\Tools\ToolsException |
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*/ |
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public function install() |
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{ |
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$em = Database::getManager(); |
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if ($em->getConnection()->getSchemaManager()->tablesExist(['sfu_post'])) { |
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return; |
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}; |
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$schemaTool = new SchemaTool($em); |
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$schemaTool->createSchema( |
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[ |
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$em->getClassMetadata(Platform::class), |
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$em->getClassMetadata(PlatformKey::class), |
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] |
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); |
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} |
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/** |
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* Save configuration for plugin. |
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* |
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* Generate a new key pair for platform when enabling plugin. |
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* |
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* @throws OptimisticLockException |
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* @throws \Doctrine\ORM\ORMException |
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* |
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* @return $this|Plugin |
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*/ |
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public function performActionsAfterConfigure() |
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{ |
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$em = Database::getManager(); |
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/** @var PlatformKey $platformKey */ |
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$platformKey = $em |
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->getRepository('ChamiloPluginBundle:LtiProvider\PlatformKey') |
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->findOneBy([]); |
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if ($this->get('enabled') === 'true') { |
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if (!$platformKey) { |
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$platformKey = new PlatformKey(); |
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} |
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$keyPair = self::generatePlatformKeys(); |
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$platformKey->setKid($keyPair['kid']); |
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$platformKey->publicKey = $keyPair['public']; |
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$platformKey->setPrivateKey($keyPair['private']); |
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$em->persist($platformKey); |
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} else { |
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if ($platformKey) { |
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$em->remove($platformKey); |
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} |
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} |
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$em->flush(); |
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return $this; |
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} |
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/** |
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* Unistall plugin. Clear the database. |
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*/ |
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public function uninstall() |
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{ |
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$em = Database::getManager(); |
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if (!$em->getConnection()->getSchemaManager()->tablesExist(['sfu_post'])) { |
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return; |
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}; |
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$schemaTool = new SchemaTool($em); |
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$schemaTool->dropSchema( |
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[ |
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$em->getClassMetadata(Platform::class), |
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$em->getClassMetadata(PlatformKey::class), |
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] |
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); |
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} |
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public function trimParams(array &$params) |
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{ |
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foreach ($params as $key => $value) { |
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$newValue = preg_replace('/\s+/', ' ', $value); |
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$params[$key] = trim($newValue); |
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} |
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} |
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private function areTablesCreated(): bool |
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{ |
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$entityManager = Database::getManager(); |
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$connection = $entityManager->getConnection(); |
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return $connection->getSchemaManager()->tablesExist(self::TABLE_PLATFORM); |
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} |
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/** |
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* Generate a key pair and key id for the platform. |
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* |
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* Return a associative array like ['kid' => '...', 'private' => '...', 'public' => '...']. |
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*/ |
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private static function generatePlatformKeys(): array |
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{ |
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// Create the private and public key |
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$res = openssl_pkey_new( |
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[ |
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'digest_alg' => 'sha256', |
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'private_key_bits' => 2048, |
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'private_key_type' => OPENSSL_KEYTYPE_RSA, |
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] |
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); |
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// Extract the private key from $res to $privateKey |
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$privateKey = ''; |
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openssl_pkey_export($res, $privateKey); |
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// Extract the public key from $res to $publicKey |
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$publicKey = openssl_pkey_get_details($res); |
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return [ |
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'kid' => bin2hex(openssl_random_pseudo_bytes(10)), |
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'private' => $privateKey, |
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'public' => $publicKey["key"], |
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]; |
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} |
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/** |
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* Get a SimpleXMLElement object with the request received on php://input. |
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* |
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* @throws Exception |
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*/ |
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private function getRequestXmlElement(): ?SimpleXMLElement |
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{ |
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$request = file_get_contents("php://input"); |
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if (empty($request)) { |
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return null; |
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} |
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return new SimpleXMLElement($request); |
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} |
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} |
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