process.sh

#!/usr/bin/env bash
PATH=${PATH}:/usr/local/bin/
for f in "$@"
do
	myoutput=""
	basename=$(basename "$f")
	dirname=$(dirname "$f")

	shrink="${dirname}/p_${basename}"

	convert "$f" -resize 1200x1200\> "$shrink"
	cwebp -q 80 "$shrink" -o "$shrink.webp"

	myoutput="${myoutput} webp: $(calc -p "$(stat -f%z "$shrink.webp") / 1000") kb"

	if [[ $basename == *".jpg" ]]; then
		jpegtran -progressive -outfile  "$shrink.jpg" "$shrink"
		myoutput="${myoutput} jpeg: $(calc -p "$(stat -f%z "$shrink.jpg") / 1000") kb"
	elif [[ $basename == *".png" ]]; then
		optipng -o5 -out "$shrink.png" "$shrink"
		myoutput="${myoutput} png: $(calc -p "$(stat -f%z "$shrink.png") / 1000") kb"
	fi
	rm "$shrink"
	terminal-notifier -title "$basename" -message "$myoutput"
done
terminal-notifier -title "Done"