wallpaper-augment

#! /usr/bin/env bash

TEMP_DIR=/home/rohitt/ramdisk
FILE_TO_WATCH=$TEMP_DIR/wallpaper-augment-file
convert -size 1920X1080 gradient:none-#000000aa -function Polynomial -4,4,0 -evaluate Pow 0.9 $TEMP_DIR/grad.png

check_if_wallpaper_needs_changing() {
	CMUS=$(cmus-status | cut -f 2- -d ')')
	WATSON="Watson: $(watson status)"
	CURR_URL=$(gsettings get org.gnome.desktop.background picture-uri)
	CURR_URL=${CURR_URL#"'file://"}
	CURR_URL=${CURR_URL%"'"}
	TIME=$(date "+%I:%M %p")
	PLAYING=$(cmus-remote -Q | head -n 1 | cut -f 2 -d ' ')
	BLUR_VALUE=$(jq .wallpaper.blur ~/.config/rohitt.json)

	STATUS_CONTENT="$CMUS|$WATSON|$CURR_URL|$TIME|$PLAYING|$BLUR_VALUE"
	FILE_CONTENT=$(cat $FILE_TO_WATCH | tr '\n' ' ')
	diff -w <(echo "$FILE_CONTENT") <(echo "$STATUS_CONTENT" | cut -c 2-) >/dev/null
	if [ $? != 0 ]; then
		echo $STATUS_CONTENT > $FILE_TO_WATCH
		echo "wallpaper-augment: Writing changes."
		return 0 # trigger change
	fi
	return 1
}

augment_wallpaper() {
	CURR_URL=$(gsettings get org.gnome.desktop.background picture-uri)
	CURR_URL=${CURR_URL#"'file://"}
	CURR_URL=${CURR_URL%"'"}

	string='My long string'
	if [[ $CURR_URL != *"variety/wallpaper/wallpaper-filter"* ]]; then
		# Fail if not a variety wallpaper. We do not want to modify wallpapers not by variety
		# or we can accidentally modify the original wallpaper file.
		echo "wallpaper-augment: Fatal error. Tried operating on a non-variety wallpaper."
		return 1
	fi

	if test -f "$CURR_URL.original"; then
		echo "wallpaper-augment: Using existing wallpaper."
	else
		echo "wallpaper-augment: Using new wallpaper."
		rm ~/.config/variety/wallpaper/*.original
		# add black overlay to wallpaper, and use it as base for further changes.
		convert $CURR_URL $TEMP_DIR/grad.png -gravity center -compose hardlight -composite $CURR_URL.original
	fi

	CMUS=$(cmus-status | cut -f 2- -d ')')
	WATSON="Watson: $(watson status)"
	TIME=$(date "+%I:%M %p")
	DATE=$(date "+%A, %B %d")
	PLAYING=$(cmus-remote -Q | head -n 1 | cut -f 2 -d ' ')
	BLUR_VALUE=$(jq .wallpaper.blur ~/.config/rohitt.json)

	PLAYING_ICON="play.png"
	CMUS_COLOR="white"
	if [ "$PLAYING" = "paused" ]; then
		PLAYING_ICON="dull_pause.png"
		CMUS_COLOR="#77777777"
	fi

	WATSON_COLOR="white"
	if [ "$WATSON" = "Watson: No project started." ]; then
		WATSON_COLOR="#77777777"
	fi

	convert $CURR_URL.original -channel RGBA -blur 0x$BLUR_VALUE $TEMP_DIR/post-blur
	convert $TEMP_DIR/post-blur -font 'Roboto-Condensed-Regular'\
			-gravity west -pointsize 30\
				-fill '#00000044' -annotate +88+418 "$CMUS"\
				-fill $CMUS_COLOR -annotate +90+420 "$CMUS"\
				-fill '#00000044' -annotate +88+458 "$WATSON"\
				-fill $WATSON_COLOR  -annotate +90+460 "$WATSON"\
			-gravity East -pointsize 100\
				-fill '#00000044' -annotate +48+383 "$TIME"\
				-fill white -annotate +50+385 "$TIME"\
			-pointsize 30\
				-fill '#00000044' -annotate +48+458 "$DATE"\
				-fill '#77777777' -annotate +50+460 "$DATE"\
			$TEMP_DIR/post-text

	convert $TEMP_DIR/post-text /home/rohitt/Documents/scripts/assets/$PLAYING_ICON\
			-gravity west -geometry +50+420 -composite $TEMP_DIR/post-icon
	cp $TEMP_DIR/post-icon $CURR_URL
	# rm $CURR_URL.*.temp
	echo "wallpaper-augment: Setting $CURR_URL."
}

augment_wallpaper
while true; do
	if check_if_wallpaper_needs_changing; then
		augment_wallpaper
	fi
	sleep 1
done

# kill all processes
trap "trap - SIGTERM && kill -- -$$" SIGINT SIGTERM EXIT