Can refresh conversation messages

src/helpers/ConversationsHelper.ts

@@ -255,6 +255,24 @@ export class ConversationsHelper {
 			},
 			limit: numberOfMessages,
 			order: "id DESC"
+		})).map(m => this.DBToConversationMessage(convID, m)).reverse();
+	}
+
+	/**
+	 * Get the new messages of a conversation
+	 * 
+	 * @param convID Target conversation ID
+	 * @param lastMessageID The ID of the last known message
+	 */
+	public static async GetNewMessages(convID: number, lastMessageID: number): Promise<Array<ConversationMessage>> {
+		return (await DatabaseHelper.Query({
+			table: MESSAGES_TABLE,
+			where: {
+				conv_id: convID
+			},
+			customWhere: "ID > ?",
+			customWhereArgs: [lastMessageID.toString()],
+			order: "id"
 		})).map(m => this.DBToConversationMessage(convID, m));
 	}