#!/bin/sh
i2p_version="0.8.6"
i2p_filename="i2pinstall_$i2p_version.exe"
i2p_url="http://i2p.googlecode.com/files/$i2p_filename"
runsvdir=/etc/sv
get_dep()
{
  dep=$1
  [ "$(dpkg-query -s "$dep"|sed -ne 's/^Status: //p')" = "install ok installed" ] || sudo apt-get install "$dep" >&2
}

oneword() { [ $# -eq 1 ]; }
oneword $i2p_filename || { echo "$0 FAIL!" >&2; exit 1; }
have() { which "$1" >/dev/null; }
wget_or_curl() { if have wget; then wget -c "$1"; elif have curl; then curl -C- -O "$1"; else get_dep wget && wget_or_curl "$1" || echo "install wget or curl" >&2; false; fi; }
user_exists() { getent passwd "$1" >/dev/null; }
set -e
do_install()
{
  if ! user_exists i2p; then
    if [ -e /home/i2p ]; then
      echo "$0: No i2p user, but /home/i2p exists; please remove /home/i2p!  Exiting." >&2
      exit 1
    fi
    sudo adduser i2p --disabled-login --gecos 'i2p anonymous router'
  fi
  if ! [ -e ~i2p/i2prouter ]; then
    if ! [ -e ~i2p/$i2p_filename ]; then
      wget_or_curl "$i2p_url"
      ln -s "$PWD/$i2p_filename" ~i2p/
    fi
    su - i2p -c "echo INSTALL_PATH=~i2p | java -jar $i2p_filename -options /dev/stdin"
  fi
}
do_uninstall()
{
  if user_exists i2p; then
    DELETEME=$(getent passwd i2p|cut -d: -f6)
    deluser i2p
  else
    DELETEME=/home/i2p
  fi
  if [ -d "$DELETEME" ]; then
    echo -n "Remove directory '$DELETEME' [y/N]? " >&2
    if read y; then
      case "$y" in
	[yY]) echo -n 'Removing... ' >&2; rm -fr "$DELETEME"; echo 'done.' >&2;;
	*) echo 'Left i2p home directory in place.' >&2;;
      esac
    fi
  fi
}

do_stop()
{
  if [ -x ~i2p/i2prouter ]; then
    sudo su - i2p -c './i2prouter stop'
  fi
}
do_start()
{
  sudo su - i2p -c './i2prouter start'
}

case "$1" in 
  install) do_install;;
  uninstall) do_stop; do_uninstall;;
  stop) do_stop;;
  start|*) do_install; do_start;;
esac