#!/bin/sh
set -e
. ${PREFIX:-~/.local}/lib/ejmejl/common
unscheduled="$(assign Inbox inbox)"

usage() {
  echo 'usage: loop ncol nrow +folder days-of-inactivity command ...' >&2
  exit 2
}
test $# -gt 4 || usage
ncol="$1"; shift
nrow="$1"; shift
folder="$1"; shift
days="$1"; test "$days" -gt 0 2> /dev/null || usage; shift
test -x "$(command -v "$1")" || usage

if test "$(who | grep "^$LOGNAME"| wc -l)" -gt 1; then
  exit # I am logged in to an interactive shell, so do nothing.
elif w -h -s "$LOGNAME" | sed "s/  */ /g" | cut -d\  -f4|grep '[sm]' > /dev/null; then
  exit # I ran a command interactively in the last hour, so do nothing.
elif test -n "$(last --since "-${days}days" --limit 1 "$LOGNAME" | head -n1)"; then
  exit # I have logged in recently, so do nothing. This also double-checks the first condition.
else
  # After triple-checking that I am probably not logged in, incdlvr and pack.
  ${PREFIX:-~/.local}/bin/incdlvr 2> /dev/null || :
  ${PREFIX:-~/.local}/bin/pack "$ncol" "$nrow" "+$unscheduled" "$unseen" | "$@"
fi