BE/src/mssql/mssql.service.ts

import { Injectable } from '@nestjs/common';
import { Connection, Request } from 'mssql';
import { MssqlDBService } from 'src/db/db.service';

@Injectable()
export class MssqlService {

    constructor(private readonly mssqlDBService: MssqlDBService) { }

    async checkConnection() {
        let connection : Connection;

        try {
            connection = await this.mssqlDBService.getConnection();
            const request = new Request(connection);
            const result = await request.query('SELECT GETDATE() AS CurrentDateTime');
            return { data: result.recordset[0].CurrentDateTime }

        } catch (error) {
            console.error('Error checking connection:', error);
            return {error:error.message}
        } finally {
            if (connection) {
                connection.close();
            }
        }
    }

}