Scripting level 0/1 (full/incr) networker backups in oracle

I've... had a reasonable pick through the documentation.

Pretty sure with some scripting we have for backups and a cronjob I could probably make this work (check backups, days since last 0/1, have some output, depending on output switch a file into the script the nsr client picks up from the DB host for running the backup, ignore the level 0/1 functionality in NSR and just run whatever backup the switched in script file tells it) but... is there anything innately build into NSR to check the number of days since the last level 0 and intelligently run a level 0 or level 1 backup as required? (So... >6 days since last lvl 0? Run lvl 0).

Currently if a scheduled level 0 is missed, level 1 backups will continue to be taken which may ultimately end up being useless with no base level full backup to roll forward from.

There's quite a bit in the pre/post scripting that looks promising but that I don't quite have a handle on. I'm coming at this from a DBA rather than from a backups ops perspective.