#!/bin/bash

# Paste a file here that contains the HTML code to be placed _before_ the MP3 tag list.
DIRLISTHEAD="/etc/mp3dir2html/head.php"

# Regular expression that is to be excluded in the final listing should exist as
# DIRLISTEX='what.*ever|another.*one' in CONFFILE. Plus, we need the resulting table's
# id as M3LTABLEID='mp3list' (or whatever else)
CONFFILE='/etc/mp3dir2html/mp3dir2html.conf'

# CORE SCRIPT FROM HERE. DON'T FIDDLE IF YOU DON'T KNOW WHAT YOU'RE DOING.

M3LTABLEID='mp3list'
DIRLISTEX="0x1fedbeef"
[ -r "$CONFFILE" ] && . "$CONFFILE" || echo "WARNING: $CONFFILE not readable..."

function m3l_help {
	echo "Usage: $(basename $0) [options]";echo
	echo "Options:"
	echo -e "  -h\t\tPrint this help text and exit"
	echo -e "  -d DIRECTORY\tSpecify a directory to be scanned"
	echo -e "  \t\tWithout supplying DIRECTORY, the current directory will be used."
}
while getopts "ht:r:p:v" params; do
	case $params in
		"h")
			m3l_help
			exit 0
		;;
		"d")
			SDIR="$OPTARG"
		;;
	esac
done

if [ "$SDIR" == "" ]; then
	SDIR="*"
fi

function m3l_rm_verb {
	#As -q nukes away too much, we have to omit that and remove status stuff here:
	grep -v 'directories scanned' | grep -v 'files read'
}

function m3l_prep_table {
	#Let's create a tab separated table with empty values where we have none but need at least an empty one.
	#	(Besides, this kind of rhymes.)
	# Additionally: ampersand handling
	sed 's/========.*/====/g' | sed 's/\t$/\t" "/g' | tr '\n' '\t' |\
	sed 's/====/\n====/g;s/====\t/====/g' |\
	sed 's/Artist\t//;s/Title\t//;s/Album\t//;s/\(.*\)Year\t/\1/;s/\(.*\)Track\t/\1/' |\
	uniq | sed 's/====//g;s/&/\&amp\;/g' | tr -s '\n' |\
	sed 's/\t0\t/\t"0"\t/g'
}

function m3l_fin_table {
	#Sort stuff, grep away lame artists and finally: put everything in order and remove the quotation marks
	#	from the entries again (leaving a whitespace char on an empty entry actually).
	sort -t \t -k 1,2 -k 2,3 -k 4,5 -k 3,4 |\
	grep -vE "$DIRLISTEX" |\
	awk -F '\t' '{print $1"\t"$2"\t"$3}' |\
	sed 's/" "/ /g;s/"0"/0/g'
}

exiftool -ext .mp3 -ext .MP3 -ext .wma -ext .WMA -ext .ogg -ext .OGG -lang en -Artist -Title -Album -Year -Track -t -r $SDIR |\
	m3l_rm_verb |\
	m3l_prep_table |\
	m3l_fin_table > content.csv

cat "$DIRLISTHEAD" > content.php
echo -n "<div id='m3lmenu'><p>">>content.php
for i in `cat content.csv|awk '{print substr($0,0,1)}'|sort|tr '[:lower:]' '[:upper:]'|uniq`;do echo -n "<a href=\"#_$i\">$i</a>">>content.php;done
echo -e "</p></div>\n<table id='$M3LTABLEID'>">>content.php
sed 's/^/<tr><td>/g;s/\t/<\/td><td>/g;s/$/<\/td><\/tr>/g' content.csv >> content.php
rm content.csv
echo -e '\n\n</table>\n</div>\n</div>\n</body>\n</html>' >> content.php

for i in `seq 0 9` `echo {A..Z}` `echo {a..z}`;do
	sed -i -e "0,/^<tr><td>\($i\)/ s/^<tr><td>\($i\)/<tr><td id=\"_\\1\">\\1/" content.php
done

echo