#!/usr/bin/env bash
# Enable this pre-commit hook by running 'make installhooks'
set -euo pipefail

git-staged-files() {
	git diff --cached -C -C -z --name-only --diff-filter=ACMRTUXB "$@"
}

git-is-staged() {
	local diff=0
	git-staged-files --quiet "$@" 2> /dev/null || diff=$?
	[[ diff -eq 1 ]] || return 1
}

map() { IFS= read -rd $'\0' "$@"; }

compress-png() {
	git-staged-files \*.png|while map file; do
		echo "Compressing $file"
		optipng -q -o7 "$file" && advpng -z -4 "$file" && advdef -z -4 "$file" | grep Output
		git add "$file"
	done
}

compress-svg() {
	git-staged-files \*.svg|while map file; do
		make nodecheck
		echo "Compressing $file"
		node_modules/.bin/svgo --config=.svgo.yml "$file"
		git add "$file"
	done
}

test-whitespace() { git diff --cached --check; }

test-js() {
	local err=0

	make eslint || err+=1

	if git-is-staged \*.js; then
		make qunit || err+=1
	fi

	return $err
}

test-php() {
	local err=0
	if git-is-staged \*.php; then
		make phplint || err+=1
	fi

	# todo: where is result set?
	if git-is-staged 'includes/skins/*.php'; then
		make validatehtml > $result || err+=1
	fi

	return $err
}

main() {
	local err=0

	compress-png
	compress-svg

	test-whitespace || err+=1
	test-js || err+=1
	test-php || err+=1

	return $err
}

main "$@"