#!/bin/bash

# Check for command-line arg.
ARGCOUNT=3
E_WRONGARGS=65
if [ $# -ne "$ARGCOUNT" ]
then
  echo "Usage: `basename $0` stream length outfile"
  exit $E_WRONGARGS
fi


STREAM=$1
LENGTH=$2
OUTFILE=$3
STREAMCMD="streamripper $STREAM -s -A -a %d.ogg -l $LENGTH -m 600 --quiet 2>&1 | tail -1 | awk '{print $1}'"
TIME=$(date +%Y-%m-%d_%H%M)


#create a temp folder to put the capture files in
TMPFOLDER="/var/tmp/airtime/rips/streamipper-$TIME"
if [ ! -d "TMPFOLDER" ]; then
  mkdir -p $TMPFOLDER
fi


#Record the stream with streamripper.  It is possible the stream is not available in which case streamripper 
#will giveup.  So try a few times... streamripper http://host:8000/stream.ogg -s -A -a %d.ogg -l 22000 -m 600

nTrys=0
maxTrys=5
status="error"
until [[ "$status" != error* ]] ; do
    echo "recording with command: streamripper $STREAM -s -A -a $TMPFOLDER/%d.ogg -l $LENGTH -m 600 --quiet"	
    status=$(streamripper $STREAM -s -A -a $TMPFOLDER/%d.ogg -l $LENGTH -m 600 --quiet 2>&1 | grep error)
    nTrys=$(($nTrys + 1))
    if [ $nTrys -gt $maxTrys ] ; then
        echo "Number of re-trys exceeded. Quitting"
   	exit	
    fi
    if [[ "$status" == error* ]] ; then
        echo "$status retry $nTrys"
        sleep 5
    fi
done

#At this point we have one or more files in the XXX folder which we need to merge with sox

#Get rid of any empty files, sox can't handle them
/usr/bin/find $TMPFOLDER/ -type f -size 0 -delete

/usr/bin/sox $TMPFOLDER/*.ogg -t ogg -C6 $OUTFILE
echo "merging files with  command: /usr/bin/sox $TMPFOLDER/*.ogg $OUTFILE" 


# then we should be done!
# you will probably to delete something
# uncomment this when you've tested everything 
#rm $TMPFOLDER/*.ogg 
#rmdir $TMPFOLDER