optimize_images

#!/usr/bin/env sh

optimize_product_images() {
	directory=$1

	optimized_dir="$directory/optimized"

	mkdir -p "$optimized_dir"

	for image in "$directory"/*.[jJ][pP][gG]; do
		image=$(basename "$image")
		new_image=$(echo "$image" | tr '[:upper:]' '[:lower:]')
		convert "$directory/$image" -resize 1270x1270 "$optimized_dir/_$new_image" || exit 1
		jpeg-recompress \
			-m ms-ssim \
			-a \
			"$optimized_dir/_$new_image" \
			"$optimized_dir/$new_image" ||
			exit 1
	done

	rm "$optimized_dir"/_*.jpg
	echo "optimized images are in: $optimized_dir" >&2
}

social_media_preview() {
	directory=$1

	optimized_dir="$directory/optimized"

	mkdir -p "$optimized_dir"

	for image in "$directory"/*.[jJ][pP][gG]; do
		image=$(basename "$image")
		new_image=$(echo "$image" | tr '[:upper:]' '[:lower:]')

		convert "$directory/$image" \
			-resize 1200x630^ \
			-gravity north \
			-extent 1200x630 \
			"$optimized_dir/_$new_image" || exit 1

		jpeg-recompress \
			-q high \
			-a \
			"$optimized_dir/_$new_image" \
			"$optimized_dir/$new_image" ||
			exit 1
	done

	rm "$optimized_dir"/_*.jpg
	echo "optimized images are in: $optimized_dir" >&2
}

optimize_lookbook_images() {
	directory=$1

	optimized_dir="$directory/optimized"

	mkdir -p "$optimized_dir"

	for image in "$directory"/*.[jJ][pP][gG]; do
		image=$(basename "$image")
		new_image=$(echo "$image" | tr '[:upper:]' '[:lower:]')
		convert "$directory/$image" -resize 1280x1280 "$optimized_dir/_$new_image" || exit 1
		jpeg-recompress \
			-q high \
			-a \
			"$optimized_dir/_$new_image" \
			"$optimized_dir/$new_image" ||
			exit 1
	done

	rm "$optimized_dir"/_*.jpg
	echo "optimized images are in: $optimized_dir" >&2
}

optimize_slider_images() {
	directory=$1

	optimized_dir="$directory/optimized"

	mkdir -p "$optimized_dir"

	for image in "$directory"/*.[jJ][pP][gG]; do
		image=$(basename "$image")
		echo "optimizing $image file" >&2
		new_image=$(echo "$image" | tr '[:upper:]' '[:lower:]')
		for color in '#b6664d' '#49594e' '#efdfd7'; do
			color_code=$(echo "$color" | cut -c2-)
			convert "$directory/$image" \
				-resize 1400x852 \
				-size 1400x852 "xc:$color" +swap \
				-gravity west \
				-composite \
				-fill "$color" \
				-draw "fill-opacity 0.35 rectangle 0,0 1060,852" \
				"$optimized_dir/$color_code-$new_image"
		done
	done

	echo "optimized images are in: $optimized_dir" >&2
}

show_help() {
	cat <<EOF
Usage: $(basename "$0") <options>
    -h, --help       Display help
    -s, --slider     Images optimization for slider
    -l, --lookbook   Optimize for lookbook and other content where high quality
                     is needed
    -p, --product    For product images - they should be square images
Example:
./$(basename "$0") -p
./$(basename "$0") -l some/deeper/directory
EOF
}

parse_command_line() {
	ARGS=$(getopt \
		-o hslpm \
		--long help,slider,lookbook,product,social-media -- "$@")
	getopt_exit="$?"

	if [ "$getopt_exit" -ne 0 ]; then
		show_help
		exit 1
	fi

	eval set -- "$ARGS"

	for o; do
		case "$o" in
		-h | --help)
			show_help
			exit
			;;
		-s | --slider)
			command="optimize_slider_images"
			shift
			;;
		-l | --lookbook)
			command="optimize_lookbook_images"
			shift
			;;
		-m | --social-media)
			command="social_media_preview"
			shift
			;;
		-p | --product)
			command="optimize_product_images"
			shift
			;;
		--)
			shift
			break
			;;
		esac
	done

	echo "$(realpath "${*:-$PWD}")"
	eval "$command $(realpath "${*:-$PWD}")"
}

main() {
	parse_command_line "$@"
}

main "$@"