implement message deletion

db/fake_db.go

@@ -93,3 +93,36 @@ func AddMessage(message map[string]interface{}) error {
 	messages = append(messages, message)
 	return WriteDB("messages", messages)
 }
+
+func DeleteMessage(messageID string) error {
+	currentData := ExecDB("messages")
+	if currentData == nil {
+		return fmt.Errorf("error reading messages database")
+	}
+
+	messages, ok := currentData["messages"].([]interface{})
+	if !ok {
+		return fmt.Errorf("messages data is in an unexpected format")
+	}
+
+	var updatedMessages []interface{}
+	found := false
+
+	for _, value := range messages {
+		if item, ok := value.(map[string]interface{}); ok {
+			if id, exists := item["ID"]; exists {
+				if idStr, ok := id.(string); ok && idStr == messageID {
+					found = true
+					continue
+				}
+			}
+		}
+		updatedMessages = append(updatedMessages, value)
+	}
+
+	if !found {
+		return fmt.Errorf("message with ID %s not found", messageID)
+	}
+
+	return WriteDB("messages", updatedMessages)
+}