OZG-5666 handle empty sentAt

nachrichten-manager-server/src/main/java/de/ozgcloud/nachrichten/antragraum/AntragraumNachrichtMapper.java

@@ -24,6 +24,9 @@
 
 package de.ozgcloud.nachrichten.antragraum;
 
+import java.time.ZonedDateTime;
+
+import org.apache.commons.lang3.StringUtils;
 import org.mapstruct.CollectionMappingStrategy;
 import org.mapstruct.Mapper;
 import org.mapstruct.Mapping;
@@ -71,8 +74,16 @@ interface AntragraumNachrichtMapper {
 	@Mapping(target = "sentSuccessful", constant = "true")
 	@Mapping(target = "subject", constant = "Antwort") // TODO klären
 	@Mapping(target = "vorgangId", ignore = true)
+	@Mapping(target = "sentAt", expression = "java(mapZonedDateTime(answer.getSentAt()))")
 	PostfachNachricht fromRueckfrageAnswer(GrpcRueckfrageAnswer answer);
 
+	default ZonedDateTime mapZonedDateTime(String sentAt) {
+		if (StringUtils.isBlank(sentAt)) {
+			return null;
+		}
+		return ZonedDateTime.parse(sentAt);
+	}
+
 	@Mapping(target = "mergeFrom", ignore = true)
 	@Mapping(target = "clearField", ignore = true)
 	@Mapping(target = "clearOneof", ignore = true)

nachrichten-manager-server/src/test/java/de/ozgcloud/nachrichten/antragraum/AntragraumNachrichtMapperTest.java

@@ -26,6 +26,7 @@ import java.time.ZonedDateTime;
 import java.time.format.DateTimeFormatter;
 import java.time.temporal.ChronoUnit;
 
+import org.apache.commons.lang3.StringUtils;
 import org.junit.jupiter.api.Nested;
 import org.junit.jupiter.api.Test;
 import org.mapstruct.factory.Mappers;
@@ -148,6 +149,15 @@ class AntragraumNachrichtMapperTest {
 			assertThat(result.getSentAt()).isCloseTo(PostfachNachrichtTestFactory.SENT_AT, within(2, ChronoUnit.SECONDS));
 		}
 
+		@Test
+		void shouldHandleEmptySentAt() {
+			var rueckfrage = GrpcRueckfrageAnswerTestFactory.createBuilder().setSentAt(StringUtils.EMPTY).build();
+
+			var result = mapper.fromRueckfrageAnswer(rueckfrage);
+
+			assertThat(result.getSentAt()).isNull();
+		}
+
 		private PostfachNachricht map() {
 			return mapper.fromRueckfrageAnswer(GrpcRueckfrageAnswerTestFactory.create());
 		}