wallpaper_daemon

#!/bin/sh

# wallpaper-daemon a daemon for randomizing and changing wallpapers using swww
# Copyright (C) 2023 Roux

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.

# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.


# adapted from a script made by the beautiful and talented marceline cramer <3
# adapted further by the aforementioned marceline cramer <3 ily roux

FIFO_PATH="/tmp/wallpaper-daemon-pipe"
WALLPAPERS_PATH="$HOME/Pictures/Wallpapers"
alias WP_LIST="/bin/find -L $WALLPAPERS_PATH -type f | /bin/sort --dictionary-order --ignore-case"
change_wp() {
	set_wallpaper "$1"
}

# sorry for the shitty cleanup :P
rm $FIFO_PATH
mkfifo $FIFO_PATH

current_wallpaper=0
tail -f $FIFO_PATH | while read -r i; do
	size=$(WP_LIST | wc -l)
	case "$i" in
	rand)
		image=$(WP_LIST | shuf -n 1)
		counter=0
		for file in $(WP_LIST); do
			if cmp "$file" "$image"; then
				current_wallpaper=$counter
				break
			else
				counter=$((counter + 1))
			fi
		done

		change_wp "$image"
		;;

	next)
		counter=0
		for image in $(WP_LIST); do
			if [ $((current_wallpaper + 1)) -gt $((size - 1)) ]; then
				tmp=$((current_wallpaper - size))
			else
				tmp=$current_wallpaper
			fi

			if [ $((tmp + 1)) -eq $counter ]; then
				current_wallpaper=$((tmp + 1))
				change_wp "$image"
				break
			else
				counter=$((counter + 1))
			fi

		done
		;;

	prev)
		counter=0
		for image in $(WP_LIST); do
			if [ $((current_wallpaper - 1)) -lt 0 ]; then
				tmp=$((current_wallpaper + size))
			else
				tmp=$current_wallpaper
			fi

			if [ $((tmp - 1)) -eq $counter ]; then
				current_wallpaper=$((tmp - 1))
				change_wp "$image"
				break
			else
				counter=$((counter + 1))
			fi

		done
		;;
	esac
done