jh-common-dataaccess/src/MssqlHelper.js

common-dataaccess

const mssql = require('mssql');
const DatabaseHelper = require('./DatabaseHelper');

module.exports = class MssqlHelper extends DatabaseHelper {
	constructor() {
		super(arguments[0]);
	}
	connect() {
		return new Promise((resovle, reject) => {
			try {
				mssql.close();
				const connection = mssql.connect(this.config);
				resovle(connection);
			} catch (err) {
				this.print(err);
				reject(err);
			}
		});
	}
	query(sqlstr) {
		return new Promise((resolve, reject) => {
			this.connect().then(client => {
				client
					.query(sqlstr)
					.then(result => {
						result.recordset.forEach(row => {
							Object.keys(row).forEach(key => {
								if (row[key] instanceof Date) {
									row[key] = this.formatDate(row[key]);
								}
							});
						});
						resolve(result.recordset);
						client.close();
					})
					.catch(err => {
						reject(err);
						client.close();
					});
			});
		});
	}
	execute(sqlstr) {
		return new Promise((resolve, reject) => {
			this.connect().then(client => {
				client
					.query(sqlstr)
					.then(result => {
						resolve(result.rowsAffected[0] > 0);
						client.close();
					})
					.catch(err => {
						reject(err);
						client.close();
					});
			});
		});
	}
	translate(transParams) {
		return new Promise((resolve, reject) => {
			this.connect()
				.then(client => {
					let request = client.request();
					transParams.l_dp.forEach(dp => {
						if (dp.paramsvalue instanceof Date) {
							dp.paramsvalue = this.formatDate(dp.paramsvalue);
						}
						request = request.input(dp.paramsname, dp.paramsvalue);
					});
					request
						.query(transParams.sql)
						.then(result => {
							resolve(result.rowsAffected[0] > 0);
							client.close();
						})
						.catch(err => {
							reject(err);
							client.close();
						});
				})
				.catch(err => {
					reject(err);
				});
		});
	}
	static datapager(pageno, pagesize, sqlstr, sp) {
		return ` select TMPTABLE2.* from (select TMPTABLE1.*,ROW_NUMBER() OVER(ORDER BY TMPTABLE1.${
			sp.Field
		} ${sp.SortDirection ||
			''} ) ROWNUM_tmp from (${sqlstr}) TMPTABLE1) TMPTABLE2 where TMPTABLE2.ROWNUM_tmp between ${(
			(pageno - 1) * pagesize +
			1
		).toString()} and ${(pageno * pagesize).toString()}`;
	}
};