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#!/bin/bash
#

zmHost=192.168.1.103
zmPort=6802
zmCamId=8
zmAlarmState="off" #default alarm to off
zmScore="1"
zmCause="foscam motion detection"
snapshotDir="/home/ftpuser/ftpUploads/webCamSnapshots/change/me"

# Send a ZoneMinder trigger
zmtrigger() {
    zmAlarmState="$1"
    echo "$zmCamId|$zmAlarmState|$zmScore|$zmCause|none|none" >/dev/tcp/"$zmHost"/"$zmPort"
}

latestfile() {
    unset -v latest
    for file in "$snapshotDir"/*; do
        [[ $file -nt $latest ]] && latest=$file
    done
    echo "$file"
}

#monitor the ftp directory the foscam saves motion snapshots to.
while inotifywait -e create "$snapshotDir"; do  
    alarmTime=$(date +%s)
    alarmSnapshot=$(latestfile)

    if [ "$zmAlarmState" == "off" ]; then
        zmtrigger "on"
        latestSnapshot=$(latestfile)
        alarmTime=$(date +%s)
    fi
	
    until [ "$zmAlarmState" == "off" ] && [ "$alarmSnapshot" == "$latestSnapshot" ]; do
		
		#check if another motion snapshot was added to the dir. 
		#If yes, reset alarm variables.
		#If no, check if theres been at least 6 seconds from the last snapshot
		
	    if [ "$alarmSnapshot" != $(latestfile) ]; then
		    alarmSnapshot=$(latestfile)
			alarmTime=$(date +%s)
            latestSnapshot=$(latestfile)
			
		elif [ "$(($(date +%s)-$alarmTime))" -ge 6 ]; then #I set 6 seconds because my camera takes snapshot every 5 seconds while detecting motion
		    zmtrigger "off"
		fi
		# wait one second and check again.
        sleep 1

        done
done