Function updateFollowingRRULE

codebase/sources/dhtmlxscheduler.es.js:18357–18398

(id, ev)

    ev.rrule = new RRule(parsedRRule.origOptions).toString().replace("RRULE:", "").split("\n")[1];
  }
  function updateFollowingRRULE(id, ev) {
    if (!ev) {
      ev = scheduler2.getEvent(id);
    }
    let rruleStringparts = ev.rrule.split(";");
    let updatedRRULE = [];
    let interval;
    for (let i = 0; i < rruleStringparts.length; i++) {
      let splited = rruleStringparts[i].split("=");
      let code = splited[0];
      let name = splited[1];
      if (code === "BYDAY") {
        if (!(ev.rrule.includes("WEEKLY") && name.length > 3)) {
          continue;
        }
      }
      if (code === "UNTIL") {
        const rule = rrulestr(ev.rrule);
        const untilDate = rule.options.until;
        if (untilDate.valueOf() < ev.start_date.valueOf()) {
          ev._end_date = ev.end_date;
        }
      }
      if (code === "INTERVAL") {
        interval = Number(name);
      }
      if (code === "COUNT") {
        if (ev._shorten_end_date) {
          const start = scheduler2.date.date_part(new Date(ev._start_date));
          const end = scheduler2.date.date_part(new Date(ev._shorten_end_date));
          const days = Math.floor((end - start) / (1e3 * 60 * 60 * 24 * interval)) + 1;
          name = name - days;
        }
      }
      updatedRRULE.push(code);
      updatedRRULE.push("=");
      updatedRRULE.push(name);
      updatedRRULE.push(";");
    }
    updatedRRULE.pop();
    ev.rrule = updatedRRULE.join("");
  }
  scheduler2._isFollowing = function(id) {
    let ev = scheduler2.getEvent(id);
    return !!(ev && ev._thisAndFollowing);