queries + inviteservice

Co-authored-by: [Mahgs] <maxoerter@gmx.de>
Co-authored-by: Christoph <tobi@urpost.de>

src/main/java/mops/gruppen2/repository/InviteRepository.java

@@ -12,4 +12,7 @@ public interface InviteRepository extends CrudRepository<InviteLinkDTO, Long> {
 
     @Query("DELETE FROM invite WHERE group_id = :group")
     void deleteLinkOfGroup(@Param("group") String group);
+
+    @Query("SELECT invite_link FROM invite WHERE group_id = :group")
+    String findLinkByGroupId(@Param("group") String groupId);
 }

src/main/java/mops/gruppen2/service/InviteService.java

@@ -0,0 +1,32 @@
+package mops.gruppen2.service;
+
+import mops.gruppen2.domain.dto.InviteLinkDTO;
+import mops.gruppen2.repository.InviteRepository;
+import org.springframework.stereotype.Service;
+
+import java.util.UUID;
+
+@Service
+public class InviteService {
+
+    private final InviteRepository inviteRepository;
+
+    public InviteService(InviteRepository inviteRepository) {this.inviteRepository = inviteRepository;}
+
+    public void createLink(UUID groupId) {
+        inviteRepository.save(new InviteLinkDTO(null, groupId.toString(), UUID.randomUUID().toString()));
+    }
+
+    public void destroyLink(UUID groupId) {
+        inviteRepository.deleteLinkOfGroup(groupId.toString());
+    }
+
+    public UUID getGroupIdFromLink(String link) {
+        return UUID.fromString(inviteRepository.findGroupIdByLink(link));
+    }
+
+    public String getLinkFromGroupId(UUID groupId) {
+        return inviteRepository.findLinkByGroupId(groupId.toString());
+    }
+
+}