Can sign out user

src/helpers/AccountHelper.ts

@@ -107,6 +107,19 @@ export class AccountHelper {
 		return Number(row.user_id);
 	}
 
+	/**
+	 * Destroy user tokens
+	 * 
+	 * @param client Information about the client
+	 * @param userID Target user ID
+	 */
+	public static async DestroyUserTokens(client: APIClient, userID: number) {
+		return DatabaseHelper.DeleteRows(USERS_TOKENS_TABLE, {
+			service_id: client.id,
+			user_id: userID
+		});
+	}
+
 	/**
 	 * Crypt a password
 	 * 

src/helpers/DatabaseHelper.ts

@@ -122,12 +122,43 @@ export class DatabaseHelper {
 	 */
 	static async InsertRow(table : string, values : any) : Promise<number> {
 		return new Promise((resolve, reject) => {
-			this.connection.query("INSERT INTO " + table + " SET ?", values, (err, results, fields) => {
+			this.connection.query("INSERT INTO " + table + " SET ?", values, (err, results, f) => {
 				if(err)
 					reject(err);
-				
-				resolve(results.insertId);
+				else
+					resolve(results.insertId);
 			});
 		});
 	}
+
+	/**
+	 * Delete entries from a table
+	 * 
+	 * @param table Target table
+	 * @param where Where arguments
+	 */
+	static async DeleteRows(table: string, where: any) {
+
+		let whereArgs = "";
+		let args = [];
+
+		// Process conditions
+		for (const key in where) {
+			if (where.hasOwnProperty(key)) {
+				const value = where[key];
+				whereArgs += (whereArgs == "" ? "" : " AND ") + key + " = ?";
+				args.push(value);
+			}
+		}
+
+		if(whereArgs == "")
+			throw Error("Error : table could accidentally get purged!");
+
+		return new Promise((resolve, reject) => {
+			this.connection.query("DELETE FROM " + table + " WHERE " + whereArgs, args, (err, r, f) => {
+				if(err) reject(err)
+				else resolve();
+			});
+		})
+	}
 }