#!/bin/sh
#
# edit-and-backup
#
# Wrapper for Tridactyl's $editorcmd, which saves a backup before returning
# to Tridactyl.
#
# © 2021–5 martin f. krafft <madduck@madduck.net>
# Released under the Apache Licence 2.0.
#
set -eu

BACKUPDIR=${TMPDIR:-/tmp}/tridactyl-backups
mkdir --parent $BACKUPDIR

FILENAME="$1"
EDITOR="${2:-editor}"

URL="${FILENAME#*_}"
URL="${URL%%_*}"

if [ -t 0 ]; then
  echo -n "\033]0;Tridactyl: editing input field on $URL using ${EDITOR%% *}\007"
fi

set -x
eval "$EDITOR" "$FILENAME"

notify() {
  local summary
  summary="$1"
  shift
  if command -v notify-send >/dev/null; then
    notify-send "$summary" "$@"
  else
    echo >&2 "$summary" "$@"
  fi
}

if [ -s "$FILENAME" ]; then

  BACKUPFILE="$(mktemp --tmpdir="$BACKUPDIR" $URL-$(date +%F-%H%M.%N)-XXXXXXXX.txt)"
  cat "$FILENAME" >"$BACKUPFILE"

  notify "Tridactyl backup saved" "Saved a backup of your edits to $BACKUPFILE"

else

  notify "Nothing to be saved"

fi

exit 0