#!/bin/bash
# = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =
#
#                                KDE COVER THUMBNAILER
#                        2011 by JaiBee (http://www.321tux.de)
#             Licence: http://creativecommons.org/licenses/by/3.0/deed.de
#
# = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =
#
# Das Skript erstellt ansprechende Ordner-Icons in CD-Hüllen-Optik
# aus den Grafiken cover.jpg/png bzw. folder.jpg/png  [Dolphin (KDE)].
#
# Das Template "KDE-cover-thumbnailer-template.png" basiert auf "JEWEL CASE PSD FILE"
# von "LeMarquis":
# http://lemarquis.deviantart.com/art/JEWEL-CASE-PSD-FILE-69316052 (CC BY-ND 3.0)
#
# = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =
#
# This script generates shining folder icons of cover.jpg/png or folder.jpg/png [Dolphin (KDE)].
#
# The template "KDE-cover-thumbnailer-template.png" is based upon "JEWEL CASE PSD FILE"
# by "LeMarquis":
# http://lemarquis.deviantart.com/art/JEWEL-CASE-PSD-FILE-69316052 (CC BY-ND 3.0)
#
# = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =
 
DIR="$HOME/Musik/"	# Arbeitsverzeichnis                 | working directory
TEMPL="$(dirname $(readlink -f $0) )/KDE-cover-thumbnailer-template.png"	# absoluter Pfad zum Template | absolute path to template
CASE=".case.png"	# Dateiname der generierten CD-Hülle | filename of generated jewel case
SIZE="96"		# Größe der CD-Hülle                 | size of jewel case
			#   16 / 22 / 32 / 48 / 64 / 80 / 96 /
			#   112 / 128 / 144 / 160 / 176 / 192 / 208 / 224 / 240 / 256
IFS=$'\12'		# nicht ändern                       | do not change
 
echo -e "\033[1;34mKDE COVER THUMBNAILER\033[0m\n2011 by JaiBee, http://www.321tux.de\n"
while getopts "rcuh" opt
do
	case $opt in
		r)	# [-r] aktuelles Verzeichnis verwenden | use current directory
			DIR=$(pwd) ;;
		c)	# [-c] Cover aus den ID3-Tags der ersten MP3-Datei eines Ordners extrahieren und in cover.jpg umbenennen
			# Read ID3 tags of the first MP3 file in each folder and extract the cover; then rename it to cover.jpg
			which eyeD3 > /dev/null || { echo "Sie benötigen das Programm \"eyeD3\", um die Cover zu extrahieren." && exit 1 ; }
 
			echo "Extrahiere ggf. Cover aus den ID3-Tags"
			# Ordner mit MP3-Dateien finden | find folders that contain MP3 files
			for mp3dir in $(find "$DIR"  -iname *.mp3 -exec dirname {} \; | uniq); do
				# wenn noch keine cover.jpg im MP3-Ordner existiert | if no cover.jpg exists already
				if ! [ -f "$mp3dir/cover.jpg" ]; then
					# erste MP3-Datei im Ordner finden              | find first MP3 file
					mp3="$(ls -1 $mp3dir | grep .mp3 | head -n1)"
					# Cover aus der Datei in den Ordner schreiben   | extract cover
					eyeD3 -i $mp3dir "$mp3dir/$mp3" > /dev/null
					# .jpeg-Grafik, die in der letzten Minute geändert wurde (= das Cover) in cover.jpg umbenennen
					# rename jpeg image that was last modified one minute ago to cover.jpg
					find "$mp3dir" -iname *.jpeg -mmin 1 -exec mv {} "$mp3dir/cover.jpg" \;
				fi
			done ;;
		u) read -p "Alle \"$CASE\" werden gelöscht und \".directory\" in \"$DIR\" werden zurückgesetzt [Enter]"
			# [-u] CD-Hüllen entfernen             | remove jewel cases
			find "$DIR" -name "$CASE" -delete
			# .directory zurücksetzen         | reset .directory
			for i in $(find $DIR -name .directory); do sed -i '/Icon=/d' "$i"; done
			exit ;;
		h)	echo -e "\033[4moptionale Optionen:\033[0m"
			echo " -r	aktuelles Verzeichnis verwenden (\"$(pwd)\")"
			echo " -c	Cover aus den ID3-Tags auslesen und als cover.jpg speichern"
			echo " -u	Thumbnails entfernen"
			echo " -h	Hilfe anzeigen"
			exit;;
		?)	;;
	esac
done
 
which convert composite > /dev/null || { echo "Sie benötigen das Programm \"imagemagick\" zur Ausführung dieses Skriptes." && exit 1 ; }
! [ -f "$TEMPL" ] && echo "ERROR: \"$TEMPL\" existiert nicht" && exit 1
 
# Cover finden | find covers
for i in $(find "$DIR" -iname cover.jpg -o -iname cover.png -o -iname folder.jpg -o -iname folder.png); do
	cd $(dirname $i)
	TMP=".tmp.$(basename $i)"	# temporäre Datei | temporary file
 
	echo "Betrete $(pwd)"
	if ! [ -f "$CASE" ]; then
		echo "    generiere Case"
		# Cover verkleinern und Hintergrund vergrößern (2x) | shrink cover and resize background (2x)
		convert "$i" -resize 220x217! -gravity east -extent 252x224 -gravity west -extent 256x224 "$TMP"
		# Template und Cover zusammensetzen                 | composite template and modified cover
		composite -gravity East "$TEMPL" "$TMP"  "$CASE"
		# CD-Hülle verkleinern                              | resize jewel case
		convert "$CASE" -resize $SIZE -background transparent -gravity south -extent ${SIZE}x$SIZE "$CASE"
		rm "$TMP"
	fi
 
	# .directory erstellen, falls die Datei noch nicht existiert          | create .directory if it not exists already
	if ! [ -f .directory ] ; then
		echo "    erstelle .directory"
		echo -e "[Desktop Entry]\nIcon=./$CASE" > .directory
	else
		# falls existierende .directory nicht das gewünschte Icon enthält | if existing .directory doesn't contain desired icon
		if ! grep -q "Icon=./$CASE" .directory; then
			echo "    bearbeite .directory"
			# wenn .directory ein anderes Icon enthält, wird dieses ersetzt (&&), ansonsten (||) wird der korrekte Eintrag angehängt
			# if .directory contains another icon: replace it (&&); else: attach right entry (||)
			grep -q "Icon=" .directory && sed -i 's/^Icon=.*/Icon=.\/'$CASE'/g' .directory \
			  || echo -e "\n[Desktop Entry]\nIcon=./$CASE" >> .directory
		fi
	 fi
done