Can get older messages

src/helpers/ConversationsHelper.ts

@@ -276,6 +276,28 @@ export class ConversationsHelper {
 		})).map(m => this.DBToConversationMessage(convID, m));
 	}
 
+	/**
+	 * Get older messages of a conversation
+	 * 
+	 * @param convID ID of the target conversation
+	 * @param startID ID from which the research should start
+	 * @param limit Maximum number of messages to get
+	 * @return The list of messages
+	 */
+	public static async GetOlderMessage(convID: number, startID: number, limit: number) : Promise<Array<ConversationMessage>> {
+		return (await DatabaseHelper.Query({
+			table: MESSAGES_TABLE,
+			where: {
+				conv_id: convID,
+			},
+			customWhere: "ID <= ?",
+			customWhereArgs: [startID.toString()],
+			order: "id DESC",
+			limit: limit
+		}))
+		.map(m => this.DBToConversationMessage(convID, m)).reverse();
+	}
+
 	/**
 	 * Mark the user has seen the last messages of the conversation
 	 *