add editing functionality

backend/src/main/java/com/llm_service/llm_service/controller/conversation/ConversationController.java

@@ -81,11 +81,22 @@ public ResponseEntity<Conversation> createConversation() {
     public ResponseEntity<ConversationResponse> continueConversation(
             @PathVariable UUID id, @RequestBody ConversationRequest conversationRequest)
             throws ConversationNotFoundException {
+        // TODO check if the id exists, else throw exception,
+        //  conversation can built with builder and passed
+        //  as a parameter for the update method
         Conversation conversation = conversationService.update(id, conversationRequest);
 
         return ResponseEntity.status(HttpStatus.OK).body(conversationControllerMapper.map(conversation));
     }
 
+    @PutMapping("/{id}/edit")
+    public ResponseEntity<ConversationResponse> editConversation(@PathVariable UUID id)
+            throws ConversationNotFoundException {
+        Conversation conversation = conversationService.edit(id);
+
+        return ResponseEntity.status(HttpStatus.OK).body(conversationControllerMapper.map(conversation));
+    }
+
     @ExceptionHandler(ConversationNotFoundException.class)
     public ResponseEntity<String> handleConversationNotFoundException(
             ConversationNotFoundException conversationNotFoundException) {

backend/src/main/java/com/llm_service/llm_service/service/ConversationService.java

@@ -33,6 +33,10 @@ public Conversation update(UUID id, ConversationRequest conversationRequest) thr
         return Conversation.builder().id(id).build();
     }
 
+    public Conversation edit(UUID id) {
+        return Conversation.builder().build();
+    }
+
     private String getPrediction(UUID id, String text) {
         return llmService.generate(text).toString();
     }