Implemented file validation

Classes/Controller/JoblistController.php

@@ -34,6 +34,7 @@ use TYPO3\CMS\Core\Resource\ResourceFactory;
 use TYPO3\CMS\Core\Utility\GeneralUtility;
 use TYPO3\CMS\Extbase\Mvc\Controller\ActionController;
 use TYPO3\CMS\Core\Utility\File\ExtendedFileUtility;
+use TYPO3\CMS\Extbase\Utility\DebuggerUtility;
 
 /**
  * The joblist plugin controller
@@ -211,6 +212,7 @@ class JoblistController extends ActionController {
 			ExtendedFileUtility::class
 		);
 		$fileProcessor->setActionPermissions(['addFile' => TRUE]);
+		$fileProcessor->setFileExtensionPermissions('pdf', '');
 
 		// Actual upload
 		$fileProcessor->start($data);

Resources/Private/Templates/Joblist/ApplyForm.html

@@ -36,13 +36,13 @@
 		<f:form.textfield property="email" id="apply-email" data="{}" class="" />
 		<br />
 		<label for="apply-cover-letter"><f:translate key="frontend.apply.cover_letter" /></label>
-		<f:form.upload multiple="true" property="coverLetter" id="apply-cover-letter" />
+		<f:form.upload multiple="true" property="coverLetter" id="apply-cover-letter" additionalAttributes="{accept: '.pdf'}" />
 		<br />
 		<label for="apply-cv"><f:translate key="frontend.apply.cv" /></label>
-		<f:form.upload multiple="true" property="cv" id="apply-cv" />
+		<f:form.upload multiple="true" property="cv" id="apply-cv" additionalAttributes="{accept: '.pdf'}" />
 		<br />
 		<label for="apply-certificates"><f:translate key="frontend.apply.certificates" /></label>
-		<input id="apply-certificates" type="file" name="tx_sgjobs_joblist[applyData][certificates]" multiple />
+		<input accept=".pdf" id="apply-certificates" type="file" name="tx_sgjobs_joblist[applyData][certificates]" multiple />
 		<br />
 		<label for="apply-message"><f:translate key="frontend.apply.message" /></label>
 		<f:form.textarea property="message" id="apply-message" data="{}" class="" />