move xdg directories to the default location.

a lot of applications seem to hardcode this location, so it's better to
have something default, or default-adjasoned.

.local/bin/satallite-wp-update

@@ -0,0 +1,64 @@
+#!/usr/bin/bash
+# shellcheck disable=SC1090,SC1091
+
+# set -xv
+
+OUTDIR="$HOME/photos/eumetsat"
+
+# full screen coverage
+# PRJ=AUTO:42004,52,5,0
+# BBOX=(-6400000 -100000 6400000 7700000)
+
+# full disk
+PRJ=AUTO:42003,0,0,0
+BBOX=(-12800000 -7200000 12800000 7200000)
+
+# europe
+# PRJ=AUTO:42004,0,0,0
+# BBOX=(22.5 -45 90 67.5)
+# BBOX=(-45 -90 180 135)
+# BBOX=(-4500000 2250000 6750000 9000000)
+
+WIDTH=1920
+HEIGHT=1080
+
+error() {
+	printf "\033[31m%s\033[0m\n" "$1"
+	. "$HOME/.fehbg"
+	exit 1
+}
+
+[ -z "$EUMETSAT_KEY" ] && error 'make sure to set EUMETSAT_KEY to the client key'
+[ -z "$EUMETSAT_SECRET" ] && error 'make sure to set EUMETSAT_SECRET to the client secret'
+
+# verify internet
+ping -c1 1.1.1.1 >>/dev/null || error "couldn't establish an internet connection!"
+
+# acquire the API key
+key=$(
+	curl -k -d "grant_type=client_credentials" \
+		-H "Authorization: Basic $(printf "%s:%s" "$EUMETSAT_KEY" "$EUMETSAT_SECRET" | base64)" \
+		https://api.eumetsat.int/token | jq -r '.["access_token"]'
+)
+
+# set url
+url="https://view.eumetsat.int/geoserver/wms?"
+url+="&service=WMS"
+url+="&request=GetMap"
+url+="&version=1.3.0"
+url+="&layers=mtg_fd:rgb_geocolour"
+url+="&width=$WIDTH&height=$HEIGHT"
+url+="&bbox=${BBOX[0]},${BBOX[1]},${BBOX[2]},${BBOX[3]}"
+url+="&crs=$PRJ"
+url+="&styles="
+url+="&transparent=true"
+url+="&format=image/png"
+url+="&access_token=$key"
+
+# process incoming data
+[ ! -d "$OUTDIR" ] && { mkdir -p "$OUTDIR" || error "failed to access '$OUTDIR'!"; }
+curl "$url" -o "$OUTDIR/tmp.png" || error "failed to download from url='$url'!"
+mv -f "$OUTDIR/tmp.png" "$OUTDIR/curr.png"
+
+# update the feh background
+. "$HOME/.fehbg"