#!/bin/bash

toolName=coturn
toolConf="/etc/turnserver.conf"

# Get script working directory
# (when called from a different directory)
WDIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" >>/dev/null 2>&1 && pwd)"
APTOPT=
CONFIG=0
SCRIPT_FILE=$(basename -- $0)
SCRIPT_NAME=${SCRIPT_FILE%%.*}
CONFIG_FILE_NAME="${SCRIPT_NAME}.cfg"
CONFIG_FILE_TEMPLATE="$WDIR/${CONFIG_FILE_NAME}.example"

step_config() {
  #echo "Called once before executing steps."
  ## e.g. to source a config file manually:
  #. "$CONFIG_FILE"
  ## or to use sequencer api with global config file:
  #initSeqConfig "$CONFIG_FILE_NAME" "$CONFIG_FILE_TEMPLATE"
  ## or to use sequencer api with profile config file support:
  #initSeqConfig -p "$SCRIPT_NAME" "$CONFIG_FILE_TEMPLATE"
  #if [ $? -eq 0 ] ; then
  #  CONFIG=1
  #else
  #  # End if no configuration file exists
  #  [ $DRY -eq 0 ] && return -1
  #fi
  [ $QUIET -ne 0 ] && APTOPT="-y"
  return 0
}

step_1_info() { echo "Install coturn"; }
step_1_alias() { ALIAS="install"; }
step_1() {
  exe apt update
  exe apt install coturn $APTOPT
}

step_10_info() { echo "Update coturn 'external-ip' using dig [CUSTOM DNS]"; }
step_10_alias() { ALIAS="updateip"; }
step_10() {
  shift
  local dnsUrl="46.182.19.48" #digitalcourage.de/support/zensurfreier-dns-server
  [ ! -z "$1" ] && dnsUrl="$1"
  local pubIp=$(dig @$dnsUrl +short cloud.imoff.de)
  local confIp=`cat "$toolConf" | grep "^external-ip" | cut -d'=' -f2`

  echoseq "Current public ip:    $pubIp"
  echoseq "Configured public ip: $confIp"

  if [ "$pubIp" != "$confIp" ]; then
    echoseq " [I] Update required"
    exe sed -i "s/^external-ip[[:space:]]*=.*/external-ip=${pubIp}/" "$toolConf"
    exe service coturn restart
  else
    echoseq " [I] No update required"
  fi
}

step_12_info() { echo "Setup public ip update cron job every 5 minutes"; }
step_12_alias() { ALIAS="cronip"; }
step_12() {
  echoseq " [I] Setup $ipCronLoc"
  addConf -s "$ipCron" "$ipCronLoc"
} 
ipCronLoc="/etc/cron.d/update_public_ip"
ipCron="*/5 * * * * root $WDIR/$SCRIPT_FILE -qq updateip"

VERSION_SEQREV=12
. /usr/local/bin/sequencer.sh