node-red-contrib-mssql/mssql.js

Node for node-red to connect to a Microsoft MS SQL Database

module.exports = function(RED) {
	'use strict';
	var mustache = require('mustache');
	var sql = require('mssql');

	function connection(config) {
	    RED.nodes.createNode(this, config);

      var node = this;
	    this.config = {
            user: node.credentials.username,
            password: node.credentials.password,
						domain: node.credentials.domain,
            server: config.server,
            database: config.database,
            options: {
                           encrypt : config.encyption,
                           useUTC: config.useUTC
                       }
        };


	    this.connection = sql;
			/*
			node.on('close',function(){
   			node.pool.close(function(){});
   		})
			*/
		}

  	RED.nodes.registerType('MSSQL-CN', connection, {
	    credentials: {
				username: {type:'text'},
				password: {type:'password'},
				domain: {type: 'text'}
	    }
	});

  	function mssql(config) {
	    RED.nodes.createNode(this, config);
	    var mssqlCN = RED.nodes.getNode(config.mssqlCN);
	    this.query = config.query;
	    this.connection = mssqlCN.connection;
	    this.config = mssqlCN.config;
	    this.outField = config.outField;

      var node = this;
	    var b = node.outField.split('.');
      var i = 0;
      var r = null;
      var m = null;
      var rec = function(obj) {
          i += 1;
          if ((i < b.length) && (typeof obj[b[i-1]] === 'object')) {
              rec(obj[b[i-1]]); // not there yet - carry on digging
          }
          else {
               if (i === b.length) { // we've finished so assign the value
                   obj[b[i-1]] = r;
                   node.send(m);
                   node.status({});
               }
               else {
                   obj[b[i-1]] = {}; // needs to be a new object so create it
                   rec(obj[b[i-1]]); // and carry on digging
               }
          }
      };

      node.on('input',function(msg){
          console.log(node.config);

          node.connection.connect(node.config).then(function(){

            node.status({fill:'blue',shape:'dot',text:'requesting'});

            var query = mustache.render(node.query,msg);

            if (!query || (query === '')) {
                query = msg.payload;
            }

            var request = new node.connection.Request();

            request.query(query).then(function (rows){
        		i = 0;
        		r = rows;
        		m = msg;
        		rec(msg);
            }).catch(function(err) {
                node.error(err);
                node.status({fill:'red',shape:'ring',text:'Error'});
                return;
            });


        }).catch(function(err) {
    		node.error(err);
    		node.status({fill:'red',shape:'ring',text:'Error'});
    		return;
        });
      });

	}
  	RED.nodes.registerType('MSSQL', mssql);
};