Can check out whether a user belongs to a conversation or not

src/helpers/ConversationsHelper.ts

@@ -51,6 +51,22 @@ export class ConversationsHelper {
 	}
 
 
+	/**
+	 * Check out whether a user is the member of a conversation or not
+	 * 
+	 * @param userID Target user ID
+	 * @param convID Target conversation
+	 */
+	public static async DoesUsersBelongsTo(userID: number, convID: number) : Promise<boolean> {
+		return await DatabaseHelper.Count({
+			table: USERS_TABLE,
+			where: {
+				conv_id: convID,
+				user_id: userID
+			}
+		}) == 1;
+	}
+
 	/**
 	 * Get the list of members of a conversation
 	 *