#!/usr/bin/env bash

# author:	Daniel Sommer <daniel.sommer@velvettear.de>
# license:	MIT

name="$1"
directory="$2"
[[ -z "$directory" ]] && directory="$(mktemp -d)"

[[ -z "$name" ]] && name="$(date '+%Y-%m-%d_%H%M%S').png"
[[ "$name" != *".png" ]] && name="$name.png"

mkdir -p "$directory"
[[ ! -d "$directory" ]] && printf "error: directory '"$directory"' does not exist and can not be created!\n" >&2 && exit 1

output="$directory/$name"

scanimage --format="png" --output-file "$output" --resolution "300" --mode "Color" 2> /dev/null

[[ ! -e "$output" ]] && printf "error: no document was scanned!\n" >&2 && exit 1
if [[ "$(du "$output" | awk '{print $1}')" == "0" ]]; then
	printf "error: scanned document '"$output"' is empty!\n" >&2 
	rm -rf "$output"
	exit 1
fi

printf "$output\n"