Can get older messages

src/controllers/ConversationsController.ts

@@ -264,6 +264,25 @@ export class ConversationsController {
 		h.success("Conversation message was sent!");
 	}
 
+	/**
+	 * Get the older messages of a conversation
+	 * 
+	 * @param h Request handler
+	 */
+	public static async GetOlderMessages(h: RequestHandler) {
+		const convID = await this.GetPostConversationId("conversationID", h);
+		const maxID = h.postInt("oldest_message_id") - 1;
+		
+		let limit = h.postInt("limit");
+		if(limit < 1) limit = 1;
+		else if(limit > 30) limit = 30;
+
+		// Get the list of messages
+		const messages = await ConversationsHelper.GetOlderMessage(convID, maxID, limit);
+
+		h.send(messages.map(e => this.ConversationMessageToAPI(e)));
+	}
+
 	/**
 	 * Get and return safely a conversation ID specified in a $_POST Request
 	 * 

src/controllers/Routes.ts

@@ -64,6 +64,8 @@ export const Routes : Route[] = [
 	{path: "/conversations/refresh_single", cb: (h) => ConversationsController.RefreshSingleConversation(h)},
 
 	{path: "/conversations/sendMessage", cb: (h) => ConversationsController.SendMessage(h)},
+
+	{path: "/conversations/get_older_messages", cb: (h) => ConversationsController.GetOlderMessages(h)},
 	
 
 	// Search controller

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
 	 *