Outdoor motion sensor or camera that ties to alarm status

I would like an outdoor motion detector that would have the option to tie into the alarm. Specifically I'm looking for a motion sensor that would send a push notification to my phone in the event someone steps on my front porch (I wouldn't want it to actually cause the siren to sound). The current cameras don't solve that issue, because I would like one that only detects motion when the alarm is armed in either home or away, but does not detect motion when the alarm is unarmed. That way I wouldn't be notified every time I walk past it while I'm home, but I would be notified when I am away or in for the night. I wouldn't have to try to remember to turn on and off alerts every time I come and go on one of your existing cameras. A camera would be acceptable, or just a motion detector, but it would need to be something that is only active when the alarm is armed. It would have to be rated for outdoor use.