folder-thumbnailer

#!/bin/bash

basename() {
	# Usage: basename "path" ["suffix"]

	dir=${1%${1##*[!/]}}

	dir=${dir##*/}

	dir=${dir%"$2"}

	printf '%s\n' "${dir:-/}"
}

[[ $# -lt 4 ]] && exit 1

for subdirectory in "normal" "large"; do
	rm -f "$HOME/.cache/thumbnails/$subdirectory/$(echo -n "$4" | md5sum | cut -d " " -f1).png"
done

# only if folder is not a symlink
if [ ! -h "$2" ] ; then

	if [ -f "$2/.folder.svg" ]; then
		inkscape --export-type=png --export-dpi=500 "$2/.folder.svg" --export-filename="$3" 1>/dev/null 2>&1
		convert -thumbnail "$1" "$3" "$3" 1>/dev/null 2>&1
		exit 0
	fi

	[ -f "$2/c001_001.jpg" ] && cp "$2/c001_001.jpg" "$2/.folder.jpg" 1>/dev/null 2>&1

	for name in "folder" "cover"; do
		for extension in png jpg jpeg webp; do
			if [ -f "$2/${name}.${extension}" ]; then
				mv -f "$2/${name}.${extension}" "$2/.${name}.${extension}" 1>/dev/null 2>&1
			fi
		done
	done

	for name in ".folder" ".cover"; do
		for extension in png jpg jpeg webp; do
			if [ -f "$2/${name}.${extension}" ]; then
				convert -thumbnail "$1" "$2/${name}.${extension}" "$3" 1>/dev/null 2>&1
				exit 0
			fi
		done
	done
fi

case "$2" in
	*"/Sites/Documents")
		cp "$HOME/.config/thumbnails/Cloud_Documents.png" "$3" 1>/dev/null 2>&1
		exit 0
		;;
	*"/Sites/Audio")
		cp "$HOME/.config/thumbnails/Cloud_Audio.png" "$3" 1>/dev/null 2>&1
		exit 0
		;;
	*"/Sites/Pictures")
		cp "$HOME/.config/thumbnails/Cloud_Pictures.png" "$3" 1>/dev/null 2>&1
		exit 0
		;;
	*"/Sites/Videos")
		cp "$HOME/.config/thumbnails/Cloud_Videos.png" "$3" 1>/dev/null 2>&1
		exit 0
		;;
	*"/Anime/"*"(Not yet aired)"*|*"/Audio Book/"*"(Not yet aired)"*)
		cp "$HOME/.config/thumbnails/Waiting for.png" "$3" 1>/dev/null 2>&1
		exit 0
		;;
	"/home/"*)
		if [ -f "$HOME/.config/thumbnails/$(basename "$2").png" ]; then
			cp "$HOME/.config/thumbnails/$(basename "$2").png" "$3" 1>/dev/null 2>&1
			exit 0
		else
			for extension in png jpg jpeg; do
				imgs="$(shopt -s nullglob;shopt -s dotglob;echo "$2"/*.${extension})"
				if [ ${#imgs[@]} == 1 ]; then
					convert -thumbnail "$1" "$2/"*.${extension} "$3" 1>/dev/null 2>&1
					exit 0
				fi
			done
		fi
		;;
esac

gdbus call --session --dest=org.freedesktop.thumbnails.Cache1 --object-path /org/freedesktop/thumbnails/Cache1 \
           --method org.freedesktop.thumbnails.Cache1.Delete "['$4']" >/dev/null
exit 0