[AB-290] fixing showing wrong active warning count in warn decay notification

fixing un mute log failing to render in case the mute did not come from a message
fixing notification failing with exception in case there were no warnings to decay

abstracto-application/abstracto-modules/moderation/moderation-impl/src/main/java/dev/sheldan/abstracto/moderation/repository/WarnRepository.java

@@ -16,6 +16,7 @@ import java.util.Optional;
 public interface WarnRepository extends JpaRepository<Warning, ServerSpecificId> {
     List<Warning> findAllByWarnedUser_ServerReferenceAndDecayedFalseAndWarnDateLessThan(AServer server, Instant cutOffDate);
     List<Warning> findAllByWarnedUser_ServerReferenceAndDecayedFalseAndWarnDateGreaterThan(AServer server, Instant cutOffDate);
+    List<Warning> findAllByWarnedUserAndDecayedFalseAndWarnDateGreaterThan(AUserInAServer user, Instant cutOffDate);
 
     List<Warning> findAllByWarnedUser_ServerReference(AServer server);
 

abstracto-application/abstracto-modules/moderation/moderation-impl/src/main/java/dev/sheldan/abstracto/moderation/service/WarnServiceBean.java

@@ -165,6 +165,9 @@ public class WarnServiceBean implements WarnService {
 
     @Transactional
     public CompletableFuture<Void> sendMemberNotifications(Long serverId, List<Long> warnIds, List<Member> members, Instant cutOffDay) {
+        if(warnIds.isEmpty()) {
+            return CompletableFuture.completedFuture(null);
+        }
         List<Warning> decayingWarnings = warnManagementService.getWarningsViaId(warnIds, serverId);
         AServer server = decayingWarnings.get(0).getWarnedUser().getServerReference();
         List<CompletableFuture<Message>> notificationFutures = new ArrayList<>();
@@ -174,7 +177,7 @@ public class WarnServiceBean implements WarnService {
             Long warningId = warning.getWarnId().getId();
             if(userIdToMember.containsKey(userId)) {
                 Member memberToSendTo = userIdToMember.get(userId);
-                List<Warning> remainingWarnings = warnManagementService.getActiveWarningsInServerYoungerThan(server, cutOffDay);
+                List<Warning> remainingWarnings = warnManagementService.getActiveWarningsFromUserYoungerThan(warning.getWarnedUser(), cutOffDay);
                 WarnDecayMemberNotificationModel model =
                         WarnDecayMemberNotificationModel
                                 .builder()

abstracto-application/abstracto-modules/moderation/moderation-impl/src/main/java/dev/sheldan/abstracto/moderation/service/management/WarnManagementServiceBean.java

@@ -49,6 +49,11 @@ public class WarnManagementServiceBean implements WarnManagementService {
         return warnRepository.findAllByWarnedUser_ServerReferenceAndDecayedFalseAndWarnDateGreaterThan(server, date);
     }
 
+    @Override
+    public List<Warning> getActiveWarningsFromUserYoungerThan(AUserInAServer user, Instant date) {
+        return warnRepository.findAllByWarnedUserAndDecayedFalseAndWarnDateGreaterThan(user, date);
+    }
+
     @Override
     public Long getTotalWarnsForUser(AUserInAServer aUserInAServer) {
         return warnRepository.countByWarnedUser(aUserInAServer);

abstracto-application/abstracto-modules/moderation/moderation-int/src/main/java/dev/sheldan/abstracto/moderation/model/template/command/UnMuteLog.java

@@ -62,6 +62,9 @@ public class UnMuteLog extends ServerContext {
      * @return A string containing an URL leading to the message where the mute was triggered
      */
     public String getMessageUrl() {
-        return MessageUtils.buildMessageUrl(this.mute.getServer().getId() ,this.getMute().getMutingChannel().getId(), this.mute.getMessageId());
+        if(this.mute.getMessageId() != null && this.mute.getMutingChannel() != null) {
+            return MessageUtils.buildMessageUrl(this.mute.getServer().getId(), this.mute.getMutingChannel().getId(), this.mute.getMessageId());
+        }
+        return null;
     }
 }

abstracto-application/abstracto-modules/moderation/moderation-int/src/main/java/dev/sheldan/abstracto/moderation/service/management/WarnManagementService.java

@@ -12,6 +12,7 @@ public interface WarnManagementService {
     Warning createWarning(AUserInAServer warnedAUser, AUserInAServer warningAUser, String reason, Long warnId);
     List<Warning> getActiveWarningsInServerOlderThan(AServer server, Instant date);
     List<Warning> getActiveWarningsInServerYoungerThan(AServer server, Instant date);
+    List<Warning> getActiveWarningsFromUserYoungerThan(AUserInAServer user, Instant date);
     Long getTotalWarnsForUser(AUserInAServer aUserInAServer);
     List<Warning> getAllWarnsForUser(AUserInAServer aUserInAServer);
     List<Warning> getAllWarningsOfServer(AServer server);