OO-3715: check submit directory and special message

src/main/java/org/olat/course/nodes/gta/ui/GTAParticipantController.java

@@ -580,14 +580,17 @@ public class GTAParticipantController extends GTAAbstractController implements A
 		DueDate availableDate = getSolutionDueDate(assignedTask);
 		boolean visible = availableDate == null || 
 				(availableDate.getDueDate() != null && availableDate.getDueDate().compareTo(new Date()) <= 0);
-		if(visible) {
-			boolean show = showSolutions(availableDate);
-			if(show) {
-				File documentsDir = gtaManager.getSolutionsDirectory(courseEnv, gtaNode);
+
+		File documentsDir = gtaManager.getSolutionsDirectory(courseEnv, gtaNode);
+		if(visible && TaskHelper.hasDocuments(documentsDir)) {
+			if(showSolutions(availableDate)) {
 				VFSContainer documentsContainer = gtaManager.getSolutionsContainer(courseEnv, gtaNode);
 				solutionsCtrl = new DirectoryController(ureq, getWindowControl(), documentsDir, documentsContainer, "run.solutions.description", "bulk.solutions", "solutions");
 				listenTo(solutionsCtrl);
 				mainVC.put("solutions", solutionsCtrl.getInitialComponent());
+			} else {
+				VelocityContainer waitVC = createVelocityContainer("no_solutions_foryou");
+				mainVC.put("solutions", waitVC);
 			}
 		} else {
 			VelocityContainer waitVC = createVelocityContainer("wait_for_solutions");
@@ -605,14 +608,24 @@ public class GTAParticipantController extends GTAAbstractController implements A
 	 * @return If the solutions are visible to the user
 	 */
 	private boolean showSolutions(DueDate availableDate) {
+		
 		boolean optional = gtaNode.isOptional();
-		File documentsDir = gtaManager.getSolutionsDirectory(courseEnv, gtaNode);
-		if(availableDate == null && optional && gtaNode.getModuleConfiguration().getBooleanSafe(GTACourseNode.GTASK_SAMPLE_SOLUTION_VISIBLE_ALL, false)
-				|| TaskHelper.hasDocuments(documentsDir)) {
-			return true;
-		} 
-		return ((availableDate != null && (optional || !availableDate.isRelative()) && gtaNode.getModuleConfiguration().getBooleanSafe(GTACourseNode.GTASK_SAMPLE_SOLUTION_VISIBLE_ALL, false))
-				|| TaskHelper.hasDocuments(documentsDir));
+		File submitDirectory;
+		if(GTAType.group.name().equals(config.getStringValue(GTACourseNode.GTASK_TYPE))) {
+			submitDirectory = gtaManager.getSubmitDirectory(courseEnv, gtaNode, assessedGroup);
+		} else {
+			submitDirectory = gtaManager.getSubmitDirectory(courseEnv, gtaNode, assessedIdentity);
+		}
+		
+		boolean show = false;
+		if(availableDate == null && optional
+				&& (gtaNode.getModuleConfiguration().getBooleanSafe(GTACourseNode.GTASK_SAMPLE_SOLUTION_VISIBLE_ALL, false) || TaskHelper.hasDocuments(submitDirectory))) {
+			show = true;
+		} else if((availableDate != null && (optional || !availableDate.isRelative())
+				&& (gtaNode.getModuleConfiguration().getBooleanSafe(GTACourseNode.GTASK_SAMPLE_SOLUTION_VISIBLE_ALL, false)) || TaskHelper.hasDocuments(submitDirectory))) {
+			show = true;
+		}
+		return show;
 	}
 
 	@Override

src/main/java/org/olat/course/nodes/gta/ui/_content/no_solutions_foryou.html

+<div class="o_info"><i class="o_icon o_icon-lg o_icon_waiting"> </i> $r.translate("no.solutions.foryou")</div>
\ No newline at end of file

src/main/java/org/olat/course/nodes/gta/ui/_i18n/LocalStrings_de.properties

@@ -132,6 +132,7 @@ mailto.group=E-Mail an Gruppe
 mailto.user=E-Mail an Benutzer 
 max.documents=Max. Anzahl von Dokumenten
 no.submission=Nicht abgegeben
+no.solutions.foryou=Sie d\u00FCrfen keine Musterl\u00F6sung sehen weil Sie kein Dokument abgegeben haben.
 notifications.accepted=Ihre Aufgabe "{0}" im Kurs "{1}" wurde akzeptiert.
 notifications.assessment.doc=F\u00FCr die Aufgabe "{0}" im Kurs "{1}" stehen bereit Bewertungsdokumente zum Download\: "{2}".
 notifications.assessment.passed=F\u00FCr die Aufgabe "{0}" im Kurs "{1}" haben Sie eine Bewertung erhalten. Sie haben {3}.

src/main/java/org/olat/course/nodes/gta/ui/_i18n/LocalStrings_en.properties

@@ -131,6 +131,7 @@ mail.confirm.assignment.subject=Assignment
 mailto.group=Mail to group 
 mailto.user=Mail to user
 max.documents=Max. number of documents
+no.solutions.foryou=You cannot see the sample solutions because you don't upload a document.
 no.submission=No submission
 notifications.accepted=Your task "{0}" in the course "{1}" has been accepted.
 notifications.assessment.doc=You received a grading document for the task "{0}" in the course "{1}"\: "{2}".