Laravel >=5. How to create/delete cron jobs on the fly?

Question

Task Schedulers

Hello!
In short , when creating a new element, you need to create a cron task associated with it, which will start at a certain time (each element has a different start time) and stop running on an event on the server (for example, on an ajax request).
Read more . Let's say we have a model for creating meetings/conferences "Meeting". Among the parameters of each meeting is the date and time of its start ( $meeting->start_date ) and a boolean flag indicating that the meeting is completed ( $meeting->completed ). When creating a new meeting, you need to create a cron task for it, which will monitor data related only to it every minute (for example, the activity of meeting participants). And when the meeting ends (when $meeting->comleted === true ) the cron task of the meeting should be terminated.
How would you approach solving such a problem (not necessarily in detail - at the algorithm level)? And is it possible to do with one cron task?
Thanks in advance for any helpful hints.
UPD: Events are now prepared (MeetingCreated, MeetingUpdated, MeetingDeleted) and there is a command meeting:start {meeting_id}. But there is a problem with calling the meeting:start command from the Job at a specific time

Answer 1

I am using node.js for something like this. Here is my advice to look.
It seems to me that it will be better + there is no load)
Look towards сron.js
Already crush similar

Answer 2

One cron task. Kind of a conveyor. Run often. For example, once every 30 seconds. And process all objects

Answer 3

I did it differently, but it doesn't always work. Making a mutator

protected $appends = ['status'];

function getStatusAttribute() {
  if ($this->start_date >= Carbon::today()->toDateString() or $this->start_date == NULL) {
    return 1;
  } else {
    return 0;
  }
}

Something like this.