#!/bin/sh

usage() {
	printf "Usage: %s -s SRC -d DEST\n" "$0"
}

on_interrupt() {
	print "Process aborted!\n"

	exit 130
}

create_thumb() {
	input="$1"
	output="$2"

	test -f "$input" && convert "$input" -scale 1400x "$output"
}

main() {
	while getopts "hs:d:" option; do
		case "${option}" in
			h) usage; exit 0;;
			s) SRC="$OPTARG";;
			d) DEST="$OPTARG";;
			*) usage; exit 1;;
		esac
	done

	if [ -z "$SRC" ]; then
		printf "You must provided the source (directory).\n"
		usage
		exit 1
	fi

	if [ -z "$DEST" ]; then
		printf "You must provided the destination (directory).\n"
		usage
		exit 1
	fi

	for image in "$SRC/"*; do
		create_thumb "$image" "$DEST/$(basename "$image")"
	done

	exit 0
}

trap on_interrupt INT

main "$@"