#!/bin/sh
# update-downcoder-metadata -- keeps the metadata on all downcoders in sync
#
# Copyright © 2000-2006 Jamie Zawinski <jwz@dnalounge.com>
#
# Permission to use, copy, modify, distribute, and sell this software and its
# documentation for any purpose is hereby granted without fee, provided that
# the above copyright notice appear in all copies and that both that
# copyright notice and this permission notice appear in supporting
# documentation.  No representations are made about the suitability of this
# software for any purpose.  It is provided "as is" without express or 
# implied warranty.
#
# Created: 20-Jul-2000

progname=update-downcoder-metadata
stream_source="$1"

metadata_url_1=http://gronk.jwz.org/jwz/gronk/current.txt
metadata_url_2=http://cerebellum.dnalounge.com/metadata.txt
dst_urls="http://cerebrum.dnalounge.com:8000/live/128"

#          http://cerebrum.dnalounge.com:8000/live/96
#          http://cerebrum.dnalounge.com:8000/live/64
#          http://cerebrum.dnalounge.com:8000/live/48
#          http://cerebrum.dnalounge.com:8000/live/32
#          http://cerebrum.dnalounge.com:8000/live/24"

# pull the password out of the icecast config
icecast_conf=/usr/local/icecast/conf/icecast.conf

if [ -f $icecast_conf ]; then
  passwd=`sed -n 's/^[ \t]*encoder_password[ \t][ \t]*\(.*\)$/\1/p' \
          $icecast_conf`
else
# icecast_conf=/usr/local/icecast/etc/icecast.xml
  icecast_conf=/etc/icecast.xml
  passwd=`sed -n 's/^.*<source-password>\([^<>]*\)<.*$/\1/p' \
          $icecast_conf`
fi


poll_delay=15
extra_lag=15


gronk_p=0
if ( echo "$stream_source" | fgrep gronk.jwz.org >/dev/null ); then
  metadata_url="$metadata_url_1"
else
  metadata_url="$metadata_url_2"
fi


PATH=/usr/local/bin:$PATH
PATH=/home/jwz/src/icecast:$PATH
export PATH

update_once() {

  data=`wget -t1 -T5 -qO- $metadata_url`

  if [ "$data" = "" ]; then
    echo "$0: no metadata" >&2
  else

    # convert "artist \t album \t track \t year" to "track - artist"
#   data=`echo "$data" | sed 's/^\(.*\)	\(.*\)	\(.*\)	\(.*\)/\3 - \1/'`

    # convert "artist \t album \t track \t year" to "artist -- track"
    data=`echo "$data" | sed 's/^\(.*\)	\(.*\)	\(.*\)	\(.*\)/\1 -- \3/'`

    sleep $extra_lag

    for url in $dst_urls ; do
      write-metadata.pl "$url" "$passwd" "$data"
    done
  fi

  sleep $poll_delay
}


update_loop() {
  while true ; do
    update_once
  done
}

# log all stdout/stderr text to syslog
log_lines() {
  while read line ; do
    logger -st "$progname" "$line"
  done
}

echo "started at `date`" | log_lines
update_loop 2>&1 | log_lines

exit 0