Added custom message repository

src/main/java/com/fnecan/study/bookapi/repository/MessageRepository.java

@@ -6,7 +6,7 @@ import org.springframework.data.mongodb.repository.Query;
 
 import java.util.List;
 
-public interface MessageRepository extends MongoRepository<MessageDocument, String> {
+public interface MessageRepository extends MongoRepository<MessageDocument, String>, MessageRepositoryCustom {
 
     @Query("{ $and: [{'conversationId': ?1} , {$or: [{ 'authorId': ?0 },{ 'recipientId': ?0 }]}] }")
     List<MessageDocument> findMessagesForUserAndConversation(String userId, String conversationId); // TODO: Test query or create a repository implementation

src/main/java/com/fnecan/study/bookapi/repository/MessageRepositoryCustom.java

@@ -0,0 +1,11 @@
+package com.fnecan.study.bookapi.repository;
+
+import com.fnecan.study.bookapi.model.MessageDocument;
+
+public interface MessageRepositoryCustom {
+    MessageDocument createMessage(
+            String message,
+            String authorId,
+            String recipientId
+    );
+}

src/main/java/com/fnecan/study/bookapi/repository/MessageRepositoryCustomImpl.java

@@ -0,0 +1,10 @@
+package com.fnecan.study.bookapi.repository;
+
+import com.fnecan.study.bookapi.model.MessageDocument;
+
+public class MessageRepositoryCustomImpl implements MessageRepositoryCustom {
+    @Override
+    public MessageDocument createMessage(String message, String authorId, String recipientId) {
+        return null;
+    }
+}

src/main/java/com/fnecan/study/bookapi/service/MessageService.java

@@ -21,4 +21,8 @@ public class MessageService {
         return messageRepository.findMessagesForUserAndConversation(userId, conversationId);
     }
 
+    public MessageDocument createMessage(String message, String authorId, String recipientId) {
+        return messageRepository.createMessage(message, authorId, recipientId);
+    }
+
 }