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#! /bin/bash
set -euf

stream_file=/tmp/krebs.stream.current

HERE=$(dirname $(readlink -f $0))
URLS=`cat $HERE/stream.db`
CURRENT_STREAM="no stream" #will be set when calling `status`
if [ ! `id -u` -eq "0" ]; then
  exec sudo "$0" "$@"
fi

#if [ ! `id -u` -eq "0" ]; then
# echo "we are going sudo..."
# exec sudo "$0" "$@"
#fi

function start() {
  # start the given stream von $1
  REQ=$1
  tmux start-server
  if status &>/dev/null ; then
    echo "!! Stream already running!"
    exit 1
  fi

  if echo "$URLS" | while read URL NAME; do
    if [ "$NAME" = "$REQ" ];then
      tmux new-session -s streams -n streams -d "
while sleep 1; do
echo $NAME > $stream_file
mplayer $URL
done
"
      echo "** $REQ started"
      exit 1
    fi
  done; then
    echo "!! Stream '$REQ' not found!"
    exit 1
  fi
}
function stop()
{
  #stops every stream
  if status &>/dev/null; then
    status | cut -d\ -f2 | xargs printf "** killing %s\n"
    tmux kill-session -t streams 2>/dev/null || echo "!! killing session failed"
  else
    echo "** no stream running";
    return 1
  fi
}

function status()
{
  #tmux has-session -t streams 2>/dev/null
  #RET=$?

  #tmux list-sessions 2>/dev/null
  #return $RET
  EV="`ps -ef | grep mplayer`"
  if echo "$URLS" | while read URL NAME; do
    if [ "`echo "$EV" | grep \"$URL\"`" ] ;then
      echo "** $NAME running ($URL)"
      exit 1
    fi
  done; then
    echo "** no stream running"
    return 1
  else
    return 0
  fi
}
function current()
{

  return 1
}
function list()
{
  echo "$URLS" | while read URL NAME ; do
    echo "$NAME : $URL"
  done

}

function shorthelp()
{
    echo "start|stop|restart|status|list [audio stream]"
}
function longhelp()
{
  B=`basename $0`
  echo -n "Usage: $B "
  shorthelp
  echo " get all available streams with '/$B list'
Examples:
$B list
$B start groove
$B restart deepmix
$B status
$B stop"
}


case "$1" in
  start)
    start ${2-"`test -f $stream_file && cat $stream_file`"}
    ;;
  stop)
    stop
    ;;
  (switch|restart)
    stop
    start $2
    ;;
  status)
    status
    exit $?
    ;;
  list)
    list
    ;;
  (--help)
    shorthelp
    ;;
  *)
    longhelp
  ;;
esac
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