Function updateFollowingRRULE

codebase/sources/dhtmlxscheduler.js:18361–18402

(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);