node-red-contrib-services-mentor/services/interval-timer.js

Mentor Services

module.exports = function(RED) {
    require('./date-format.js')
    var log = RED.log;
    function IntervalTimerNode(config) {
        RED.nodes.createNode(this,config);
        var node = this;
        var interval = 1000*config.interval;
        var timer;
        this.initialdefer = parseInt(config.initialdefer, 5) || 0;

        var timeHandler = function() {
            var date =  Date.now();
            
            if (node.initialdefer > 0)
               node.status({fill:"yellow",shape:"dot",text:"Defering " + node.initialdefer + " seconds(s)"});
             else
               node.status({fill:"green",shape:"dot",text:"Next: " + formatDate(date + (interval - (date % interval)))});

            
            setTimeout(function () {
                node.send({payload: config.payload || date - (date % interval)});       
                node.status({fill:"green",shape:"dot",text:"Next: " + formatDate(date + (interval - (date % interval)))});
              }, node.initialdefer*1000)
            
            
            timer = setTimeout(timeHandler, interval - (date % interval));  // setInterval apparently has a considerable drift, so we use setTimeout to stay within the time grid as much as possible
            
        };

        if (interval > 0)
        {
            var date =  Date.now();
            timer = setTimeout(timeHandler, interval - (date % interval));        
            node.status({fill:"green",shape:"dot",text:"Next: " + formatDate(date + (interval - (date % interval)))});
        } else node.status({fill:"yellow",shape:"dot",text:"OFF"});

        node.on('close', function() {
            clearTimeout(timer);
        });
    }

    function formatDate (date) {
        now = new Date(date);
        return now.format('d-m-Y H:i:s P');
        /*
        year = "" + now.getFullYear();
        month = "" + (now.getMonth() + 1); if (month.length == 1) { month = "0" + month; }
        day = "" + now.getDate(); if (day.length == 1) { day = "0" + day; }
        hour = "" + now.getHours(); if (hour.length == 1) { hour = "0" + hour; }
        minute = "" + now.getMinutes(); if (minute.length == 1) { minute = "0" + minute; }
        second = "" + now.getSeconds(); if (second.length == 1) { second = "0" + second; }
        return year + "-" + month + "-" + day + " " + hour + ":" + minute + ":" + second;
        */
      }

    RED.nodes.registerType("Interval", IntervalTimerNode);
}