Automatically downloads wallpapers from https://t.me/shingekinowall

shingekinowall.sh

#!/usr/bin/env sh
set -o errexit

_local="$HOME/.local/bin"
[ -n `echo $PATH | grep "${_local}"`  ] || \
	export PATH="$PATH:${_local}"

which telegram-download 1>2 2>/dev/null || \
	pip install --user telegram-upload

_dest=`xdg-user-dir PICTURES`
[ -z "${_dest}" ] && _dest="$HOME/Pictures"
_dest="${_dest}/ShingekiNoWall"

mkdir -p "${_dest}"

pushd "${_dest}"
	telegram-download --from 'shingekinowall'
popd

_service_dir="$HOME/.config/systemd/user"
_service="${_service_dir}/shingekinowall.service"
_timer="${_service_dir}/shingekinowall.timer"
install_service() {
	[ -d  "${_local}" ] || mkdir -p "${_local}"
	cp "$0" "${_local}/shingekinowall"	

	mkdir -p "${_service_dir}"
	tee "$_service" > /dev/null <<EOF
[Unit]
Description=Downloads shingekinowall images

[Service]
ExecStart="${_local}/shingekinowall"

[Install]
WantedBy=default.target
EOF


	tee "$_timer" > /dev/null <<EOF
[Unit]
Description=Once per day automation

[Timer]
OnCalendar=daily
Persistent=true

[Install]
WantedBy=timers.target
EOF
	
	systemctl --user start shingekinowall.timer	
	systemctl --user enable shingekinowall.timer
}
[ -f "${_service}" ] || install_service