OPENOLAT-543: Show message when course is locked but can't be deleted until...

OPENOLAT-543: Show message when course is locked but can't be deleted until the safety interval is over.

src/main/java/org/olat/repository/_i18n/LocalStrings_de.properties

@@ -227,6 +227,7 @@ details.delete.acknowledge=Best\u00E4tigung
 details.delete.acknowledge.error=Bitte best\u00E4tigen.
 details.delete.acknowledge.msg=Alle Dateien werden definitiv gel\u00F6scht und k\u00F6nnen nicht mehr wiederhergestellt werden.
 details.delete.alt={0} l\u00F6schen
+details.delete.locked.until.desc=Diese Lernressource kann nicht vor dem {0} gel\u00F6scht werden.
 details.delete.soft.acknowledge.msg=Die Lernressource wird als gel\u00F6scht markiert.
 details.delete.soft.desc=Mit dieser Funktion wird die Lernressource als gel\u00F6scht markiert.
 details.delete.soft.desc.1=Die Benutzerdaten werden aus dem Kurs entfernt.

src/main/java/org/olat/repository/_i18n/LocalStrings_en.properties

@@ -232,6 +232,7 @@ details.delete.notOrphan=still referenced
 details.delete.notOwner=not owner
 details.delete.references=Do you wish to delete the referenced learning resources too?
 details.delete.safety.interval=14
+details.delete.locked.until.desc=This learning resource can't be deleted until {0}.
 details.delete.soft.acknowledge.msg=The learning resource will be marked as deleted.
 details.delete.soft.auto.desc=<strong>The course will be automatically deleted at {0}.</strong>
 details.delete.soft.desc=Using this method the learning resource will be marked as deleted.

src/main/java/org/olat/repository/ui/RepositoryEntryLifeCycleChangeController.java

@@ -123,16 +123,34 @@ public class RepositoryEntryLifeCycleChangeController extends BasicController{
 		}
 
 		boolean deleteManaged = RepositoryEntryManagedFlag.isManaged(re, RepositoryEntryManagedFlag.delete);
-		
-		Date now = new Date();
-        Calendar cal = Calendar.getInstance();
-        cal.setTime(now);
-        cal.add(Calendar.DATE, -Integer.parseInt(translate("details.delete.safety.interval")));
-		
-		if (!deleteManaged && 
-				( (!CourseModule.getCourseTypeName().equals(re.getOlatResource().getResourceableTypeName()))
-						|| re.getLastModified().before(cal.getTime()))
-				) {
+        boolean showDeleteButton = false;
+
+		if (!deleteManaged) {
+			if ( CourseModule.getCourseTypeName().equals(re.getOlatResource().getResourceableTypeName()) ) {
+				if ( re.getStatusCode() == RepositoryEntryStatus.REPOSITORY_STATUS_CLOSED ) {
+
+					Date now = new Date();
+			        Calendar cal = Calendar.getInstance();
+			        cal.setTime(now);
+			        Integer safetyInterval = Integer.parseInt(translate("details.delete.safety.interval"));
+			        cal.add(Calendar.DATE, -safetyInterval);
+
+					if ( re.getLastModified().before(cal.getTime()) ) {
+						showDeleteButton = true;
+					} else {
+						// The course is already closed but the safety interval is not over yet.
+						Calendar lockedUntil = Calendar.getInstance();
+						lockedUntil.setTime(re.getLastModified());
+						lockedUntil.add(Calendar.DATE, safetyInterval);
+						lifeCycleVC.contextPut("deleteLockedUntil", Formatter.getInstance(getLocale()).formatDateAndTimeLong(lockedUntil.getTime()));
+					}
+				}
+			} else {
+				showDeleteButton = true;				
+			}
+		}
+
+		if (showDeleteButton) {
 			deleteLink = LinkFactory.createButton("delete", lifeCycleVC, this);
 			String type = translate(handler.getSupportedType());
 			deleteLink.setCustomDisplayText(translate("details.delete.alt", new String[]{ type }));

src/main/java/org/olat/repository/ui/_content/lifecycle_change.html

@@ -53,5 +53,12 @@
 		</div>
 	</div>
 #end
-	
+
+#if($r.isNotNull($deleteLockedUntil))
+	<h4>$r.translate("details.delete")</h4>
+	<div class="o_error">
+		<p>$r.translate("details.delete.locked.until.desc", $deleteLockedUntil)</p>
+	</div>	
+#end
+
 </fieldset>
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