Resolve "Job offers without actions should be collapsed by default"

Closes #81 (closed) see issue desc

src/main/java/nl/tudelft/tam/service/ApplicationService.java

@@ -34,6 +34,7 @@ import nl.tudelft.tam.dto.view.details.ApplicationDetailsPersonDTO;
 import nl.tudelft.tam.dto.view.details.JobOfferDetailsDTO;
 import nl.tudelft.tam.dto.view.summary.ApplicationStatusSummaryDTO;
 import nl.tudelft.tam.dto.view.summary.ApplicationSummaryDTO;
+import nl.tudelft.tam.dto.view.summary.JobOfferSummaryDTO;
 import nl.tudelft.tam.enums.Status;
 import nl.tudelft.tam.exception.ApplicationStatusException;
 import nl.tudelft.tam.model.Application;
@@ -638,4 +639,19 @@ public class ApplicationService {
 
 		return !previousRoles.isEmpty();
 	}
+
+	/**
+	 * Checks whether there are no valid student actions at the moment
+	 *
+	 * @param  editionOffers The offers for an edition
+	 * @param  map           Map which maps offer ids to a status summary
+	 * @return               Checks whether all offers of an edition require no more student actions
+	 */
+	public boolean checkEditionCollapsable(List<JobOfferSummaryDTO> editionOffers,
+			Map<Long, ApplicationStatusSummaryDTO> offerStatusMap) {
+		var collapsableFilter = Set.of(Status.ACCEPTED, Status.REJECTED_BY_TEACHER);
+		return editionOffers.stream().allMatch(offer -> offer.getHiringMessage() == null)
+				&& editionOffers.stream().map(offer -> offerStatusMap.get(offer.getId()))
+						.allMatch(offer -> offer.exists() && collapsableFilter.contains(offer.getStatus()));
+	}
 }