mailcheck

#!/bin/sh

# simple mailcheck command to leave running in a tmux pane
# configurable via ~/.mblaze/profile
# by default runs fdm to check mail and mairix to index it
# ymmv

MBLAZE=${MBLAZE-$HOME/.mblaze}
profile="$MBLAZE/profile"

sleep=$1

sleeper_pid=0

ts () {
	date +"$date_fmt"
}

getmblazeopt () {
    [[ -n $1 ]] && mhdr -h $1 $profile | envsubst && return 0
    return 1
}

check_cmd=$(getmblazeopt MailCheckCommand)
check_cmd=${check_cmd:-"fdm -q fetch"}

sleep=${1:-$(getmblazeopt MailCheckSleep)}
sleep=${sleep:-30}

check_lockf=$(getmblazeopt MailCheckLockFile)
check_lockf=${check_lockf:-"$HOME/.fdm.lock"}

index_cmd=$(getmblazeopt MailCheckIndexCommand)
index_cmd=${index_cmd:--}
if [[ $index_cmd == "-" ]]; then
    index_cmd=""
else
    index_cmd=${index_cmd:-"mairix -p"}
fi

date_fmt=$(getmblazeopt MailCheckDateFmt)
date_fmt=${date_fmt:-"%Y-%m-%d %H:%M"}

shleep () {
	sleep $1 >/dev/null 2>&1 & sleeper_pid=$!
	echo $(ts) sleeping ...
	wait $sleeper_pid 2>/dev/null
	[ $? -ne 0 ] && echo $(ts) wakeup
	sleeper_pid=0
}

wakeup () {
	[ $sleeper_pid -ne 0 ] && \
		kill $sleeper_pid >/dev/null 2>&1 && \
		wait $sleeper_pid
}

mailcheck () {
	echo $(ts) checking ...
	${check_cmd}
	if [ -n "${index_cmd}" ]; then
		echo $(ts) indexing ...
		${index_cmd}
	fi
}

clear_lockfile () {
	[ -n "${check_lockf}" ] && rm -f ${check_lockf}
}

interrupted () {
	wakeup
	clear_lockfile
	exit 1
}

trap 'interrupted' INT TERM QUIT
trap 'wakeup' INFO

clear_lockfile
[ -z "${index_cmd}" ] && echo "[automatic indexing is OFF]"
while true; do
	mailcheck
	shleep ${sleep}
done