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Viewing file:     time-matcher.js (1.76 KB)      -rw-r--r--

const validatePattern = require('./pattern-validation');
const convertExpression = require('./convert-expression');

function matchPattern(pattern, value){
    if( pattern.indexOf(',') !== -1 ){
        const patterns = pattern.split(',');
        return patterns.indexOf(value.toString()) !== -1;
    }
    return pattern === value.toString();
}

class TimeMatcher{
    constructor(pattern, timezone){
        validatePattern(pattern);
        this.pattern = convertExpression(pattern);
        this.timezone = timezone;
        this.expressions = this.pattern.split(' ');
        this.dtf = this.timezone
            ? new Intl.DateTimeFormat('en-US', {
                year: 'numeric',
                month: '2-digit',
                day: '2-digit',
                hour: '2-digit',
                minute: '2-digit',
                second: '2-digit',
                hourCycle: 'h23',
                fractionalSecondDigits: 3,
                timeZone: this.timezone
            }) : null;
    }

    match(date){
        date = this.apply(date);

        const runOnSecond = matchPattern(this.expressions[0], date.getSeconds());
        const runOnMinute = matchPattern(this.expressions[1], date.getMinutes());
        const runOnHour = matchPattern(this.expressions[2], date.getHours());
        const runOnDay = matchPattern(this.expressions[3], date.getDate());
        const runOnMonth = matchPattern(this.expressions[4], date.getMonth() + 1);
        const runOnWeekDay = matchPattern(this.expressions[5], date.getDay());

        return runOnSecond && runOnMinute && runOnHour && runOnDay && runOnMonth && runOnWeekDay;
    }

    apply(date){
        if(this.dtf){
            return new Date(this.dtf.format(date));
        }

        return date;
    }
}

module.exports = TimeMatcher;