#!/bin/bash
# ogg2wav
#
# Convert .ogg files in downloads/ to .wav files.
# It checks sha1 before converting, re-downloads if bad.
# Dependency: vorbis-tools sox
#
# Usage:
# ogg2wav
# Example:
# ogg2wav

OGGDECOPT=""

cd download/ || exit

# Compile a list of ogg files (NOTE: THIS WILL BREAK AS ARCHIVE GROWS XXX)
echo "Total audio files: `ls -1 */satnogs_*.ogg | wc -l`"
for i in 13*/satnogs_*.ogg
	do OBSID=`dirname $i`
	# Go into directories with audiofiles
	echo $OBSID
	cd $OBSID
	# See if there is an archive.org XML file, if not, download it.
	XMLURL="https://archive.org/download/satnogs-observation-$OBSID/satnogs-observation-$OBSID""_files.xml"
	XMLFILE=`basename "$XMLURL"`
	[ ! -f "$XMLFILE" ] &&						\
	curl                                                            \
       		--location                                              \
		--silent                                                \
		--http2 --ipv4                                          \
		--remote-time                                           \
		--output $XMLFILE                                       \
		$XMLURL                                                 \
		&& sleep `echo $((0 + RANDOM % 1))`
	# Get name of audio file.
	AUDIOURL=`cat $OBSID.json | jq --compact-output '.[0] | {archive_url}' | grep ogg | cut -f 2- -d : | sed -e 's/}//g' -e 's/http:/https:/g' -e 's/"//g'`
	AUDIOFILE=`basename "$AUDIOURL"`
	# Get sha1 for audio file. XXX sgrep dependency XXX
	AUDIOXMLSHA1=`sgrep -g xml							\
	'"<file name=\"'$AUDIOFILE'\" source=\"original\"" .. "/file>"' \
	"$XMLFILE" |				\
	grep "<sha1>" |							\
	sed -e 's/.*<sha1>//' -e 's/<\/sha1>//'`
	AUDIOFILESHA1=`sha1sum $AUDIOFILE | cut -f 1 -d " "`
	WAVFILE="`basename $AUDIOFILE .ogg`.wav"
	AUDIOFILESEC=`soxi -D $AUDIOFILE`
	WAVFILESEC=`soxi -D $WAVFILE`
	echo -e -n "XML:  $AUDIOXMLSHA1\nFile: $AUDIOFILESHA1 "
	# Is OGG SHA1 checksum good?
	if [ "$AUDIOXMLSHA1" = "$AUDIOFILESHA1" ] ; then
		# Is WAV file same length as OGG? (or better way to see if WAV is OK?
		if [ "$AUDIOFILESEC" = "$WAVFILESEC" ] ; then
				echo "good wav"
			else
				echo "Encode"
				echo "oggdec $OGGDECOPT $AUDIOFILE"
				ls -hl $AUDIOFILE *wav
				nice oggdec $OGGDECOPT $AUDIOFILE
			fi
		else
			echo "Bad, re-downloading $AUDIOURL"
			rm "$AUDIOFILE"
			curl							\
			--location						\
			--silent						\
			--http2 --ipv4						\
			--remote-time						\
			--output $AUDIOFILE					\
			$AUDIOURL						\
	                && sleep `echo $((0 + RANDOM % 1))`
			AUDIOFILESHA1=`sha1sum $AUDIOFILE | cut -f 1 -d " "`
			echo -e -n "XML:  $AUDIOXMLSHA1\nFile: $AUDIOFILESHA1 "
			if [ "$AUDIOXMLSHA1" = "$AUDIOFILESHA1" ] ; then
				echo "Re-download is good, encode"
				echo 'oggdec "$OGGDECOPT" "$AUDIOFILE"'
				nice oggdec $OGGDECOPT $AUDIOFILE
			else
				echo "Still bad after re-downloading, remove"
				rm "$AUDIOFILE"
			fi
		fi
		cd ..


done