#!/bin/bash
#
# Run a system upgrade.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public
# License along with this program.  If not, see
# <http://www.gnu.org/licenses/>.

# Basic parameters
TIMEFRAME="${1:-86400}"
DATE="`date +%s`"
LOG="/var/lib/hydractl/aperidic-upgrade"

# Upgrade and save timestamp
function hydractl_aperiodic_upgrade {
  hydractl upgrade
  date +%s | $sudo tee $LOG > /dev/null
  exit
}

# Set sudo config
if [ "`whoami`" != 'root' ]; then
  sudo="sudo"
fi

# Ensure log folder
$sudo mkdir -p "`dirname $LOG`"

# Run
if [ ! -e "$LOG" ]; then
  hydractl_aperiodic_upgrade
else
  LAST="`cat $LOG`"

  if [ ! -z "$LAST" ]; then
    INTERVAL="$(($DATE - $LAST))"

    # More than $TIMEFRAME?
    if [ "$INTERVAL" -gt "$TIMEFRAME" ]; then
      hydractl_aperiodic_upgrade
    else
      NEXT="$(($TIMEFRAME - $INTERVAL))"
      echo "Please enjoy life for an additional $NEXT seconds before running this command again."
    fi
  else
    hydractl_aperiodic_upgrade
  fi
fi