#!/bin/sh -e

# These should be executable, and take a single parameter
editor="/home/cyberleo/.fhs/bin/ee"
browser="/home/cyberleo/.fhs/bin/ff"

jroot="${1}/root"
jipc="${jroot}/tmp/jipc"
mkdir -p "$(dirname "${jipc}")"

[ ! -p "${jipc}" ] || { echo "jipc already running? ${jipc} exists" >&2; exit 1; }
mkfifo -m 666 "${jipc}"
trap "rm -f '${jipc}'" EXIT HUP INT TERM KILL
echo "Listening on ${jipc} ..." >&2

resolve_path() {
  path="${1}"
  echo "${path}" | grep -q '^/' && echo "${jroot}${path}" || zenity --error --text="Only absolute paths are allowed in chroot protocol:\n${path}"
}

do_editor() {
  arg="${1}"
  arg="$(resolve_path "${arg}")"
  ( "${editor}" "${arg}" || zenity --error --text="Error launching editor:\n${editor} ${arg}" ) &
}

do_browser() {
  arg="${1}"
  case "${arg}" in
  file://*)
    arg="${arg##file://}"
    arg="$(resolve_path "${arg}")"
    [ "${arg}" ] && arg="file://${arg}"
    ;;
  [a-z]*://*)
    ;;
  *)
    arg="$(resolve_path "${arg}")"
    [ "${arg}" ] && arg="file://${arg}"
    ;;
  esac
  [ "${arg}" ] && ( "${browser}" "${arg}" || zenity --error --text="Error launching browser:\n${browser} ${arg}" ) &
}

do_gitk() {
  arg="$(resolve_path "${1}")"
  (
    [ -d "${arg}/.git" -o -f "${arg}/config" ] && ( cd "${arg}"; gitk ) || \
      zenity --error --text="Not a git repository:\n${arg}"
  ) &
}

do_gitka() {
  arg="$(resolve_path "${1}")"
  (
    [ -d "${arg}/.git" -o -f "${arg}/config" ] && ( cd "${arg}"; gitk --all ) || \
      zenity --error --text="Not a git repository:\n${arg}"
  ) &
}

do_error() {
  cmd="${1}"
  arg="${2}"
  zenity --error --text="Unrecognized verb in protocol:\n${cmd} ${arg}"
}

while true
do
  unset cmd arg
  [ -p "${jipc}" ] || break
  read cmd arg 2>&- < "${jipc}"
  [ "${cmd}" ] || continue
  cmd="$(echo "${cmd}" | tr '[A-Z]' '[a-z]')"
  case "${cmd}" in
  exit|die|kill) kill $$; exit 0 ;;
  editor) do_editor "${arg}" ;;
  browser) do_browser "${arg}" ;;
  gitk) do_gitk "${arg}" ;;
  gitka) do_gitka "${arg}" ;;
  *) do_error "${cmd}" "${arg}" ;;
  esac
  sleep 0.25
done