From 438ac2f21f1301333b33fa6d962827a20b95356b Mon Sep 17 00:00:00 2001
From: chaewonkim <kimlove9182@gmail.com>
Date: Tue, 3 Sep 2024 00:52:12 +0900
Subject: [PATCH] [fix] #117 delete promise according to the number of
 participants when leave promise

---
 .../server/service/participant/ParticipantService.java     | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/main/java/org/kkumulkkum/server/service/participant/ParticipantService.java b/src/main/java/org/kkumulkkum/server/service/participant/ParticipantService.java
index 877a136..76849d0 100644
--- a/src/main/java/org/kkumulkkum/server/service/participant/ParticipantService.java
+++ b/src/main/java/org/kkumulkkum/server/service/participant/ParticipantService.java
@@ -15,6 +15,7 @@
 import org.kkumulkkum.server.external.dto.FcmMessageDto;
 import org.kkumulkkum.server.external.enums.FcmContent;
 import org.kkumulkkum.server.service.member.MemberRetreiver;
+import org.kkumulkkum.server.service.promise.PromiseRemover;
 import org.kkumulkkum.server.service.promise.PromiseRetriever;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
@@ -35,6 +36,7 @@ public class ParticipantService {
     private final PromiseRetriever promiseRetriever;
     private final MemberRetreiver memberRetreiver;
     private final ParticipantRemover participantRemover;
+    private final PromiseRemover promiseRemover;
     private final FcmService fcmService;
 
     @Transactional
@@ -169,6 +171,11 @@ public void leavePromise(
     ) {
         Participant participant = participantRetriever.findByPromiseIdAndUserId(promiseId, userId);
         participantRemover.deleteById(participant.getId());
+
+        List<Participant> remainingParticipants = participantRetriever.findAllByPromiseId(promiseId);
+        if(remainingParticipants.isEmpty()) {
+            promiseRemover.deleteById(promiseId);
+        }
     }
 
     private boolean validateState(