Function collision

codebase/sources/dhtmlxscheduler.es.js:9908–10028

(scheduler2)

  };
}
function collision(scheduler2) {
  let temp_section;
  let before;
  scheduler2.config.collision_limit = 1;
  function _setTempSection(event_id) {
    const checked_mode = scheduler2._get_section_view();
    if (checked_mode && event_id) {
      temp_section = scheduler2.getEvent(event_id)[scheduler2._get_section_property()];
    }
  }
  scheduler2.attachEvent("onBeforeDrag", function(id) {
    _setTempSection(id);
    return true;
  });
  scheduler2.attachEvent("onBeforeLightbox", function(id) {
    const ev = scheduler2.getEvent(id);
    before = [ev.start_date, ev.end_date];
    _setTempSection(id);
    return true;
  });
  scheduler2.attachEvent("onEventChanged", function(id) {
    if (!id || !scheduler2.getEvent(id))
      return true;
    const ev = scheduler2.getEvent(id);
    if (!scheduler2.checkCollision(ev)) {
      if (!before)
        return false;
      ev.start_date = before[0];
      ev.end_date = before[1];
      ev._timed = this.isOneDayEvent(ev);
    }
    return true;
  });
  scheduler2.attachEvent("onBeforeEventChanged", function(ev, e, is_new) {
    return scheduler2.checkCollision(ev);
  });
  scheduler2.attachEvent("onEventAdded", function(id, ev) {
    const result = scheduler2.checkCollision(ev);
    if (!result)
      scheduler2.deleteEvent(id);
  });
  scheduler2.attachEvent("onEventSave", function(id, edited_ev, is_new) {
    edited_ev = scheduler2._lame_clone(edited_ev);
    edited_ev.id = id;
    if (!(edited_ev.start_date && edited_ev.end_date)) {
      const ev = scheduler2.getEvent(id);
      edited_ev.start_date = new Date(ev.start_date);
      edited_ev.end_date = new Date(ev.end_date);
    }
    if (edited_ev.rrule && !edited_ev.recurring_event_id || edited_ev.rec_type) {
      scheduler2._roll_back_dates(edited_ev);
    }
    return scheduler2.checkCollision(edited_ev);
  });
  scheduler2._check_sections_collision = function(first, second) {
    const map_to = scheduler2._get_section_property();
    if (first[map_to] == second[map_to] && first.id != second.id)
      return true;