One of the biggest concerns for me and many other scripters when writing event-handler-oriented codes is that if someone removes our EHs by mistake (e.g. using incorrect ID, like how many newbies just remove `0`) or intentionally (many newbies doing `removeAllXXXEventHandlers`), our design could fail entirely.
Thus, I would like to ask for scripting commands that allow us to detect and counter these problems.
1. Get next event handler ID:
```
getEventHandlersCount [entity, "name"];
entity: can be NAMESPACE (maybe only missionNamespace? for mission/user EHs)/OBJECT/GROUP/CONTROL/DISPLAY
name: event handler name
returns: number of EHs added (in other words, last added ID)
```
Since EH IDs are incremental, this allows us to know if any new EHs have been added after ours. This command will also be useful for the Intercept project.
2. A command that checks if the event handler still exists and has not been removed yet:
```
isEventHandlerValid [entity, "name", ID]
entity: can be NAMESPACE (maybe only missionNamespace? for mission/user EHs)/OBJECT/GROUP/CONTROL/DISPLAY
name: event handler name
ID: number: EH ID
returns: bool
```