#!/bin/sh

src="${SRC:-src}"
dest="${DEST:-public_html}"
template="${TEMPLATE:-index.html.in}"
styles="${STYLESHEET:-stylesheet.css}"
filters="${FILTERS:-filters.sed}"
title="${TITLE:-rnkn}"
baseurl="${BASEURL:-https://sdf.org/~rnkn}"
script="$0"
buildlist=$(mktemp)
buildfiles="$buildlist"

trap 'rm -rf $buildfiles' EXIT

get() {
	find "$1" -type f -name "*.$2"
}

txt2html() {
	while read -r file; do
		tmphtml="${file%.*}.html"
		sed -Ef "$filters" < "$file" > "$tmphtml"
		buildfiles="$tmphtml $buildfiles"
	done
}

csv2txt() {
	while read -r file; do
		tmptxt="${file%.*}.txt"
		column -ts, < "$file" > "$tmptxt"
		buildfiles="$tmptxt $buildfiles"
	done
}

build() {
	while read -r file; do
		desthtml="$dest/$(basename "$file")"
		m4 -D__TITLE__="$title" \
		   -D__BASEURL__="$baseurl" \
		   -D__FILE__="$file" \
		   < "$template" > "$desthtml"
	done
}

sitemap() {
	sitemap="$src/all.txt"
	rm -f "$sitemap"
	touch "$sitemap"
	while read -r file; do
		file="$(basename "$file")"
		echo "[[${file%.txt}]]" >> "$sitemap"
	done
}

mkdir -p "$dest"
rm -rf "$dest"/*

get src csv > "$buildlist"
csv2txt < "$buildlist"

get src txt | sort > "$buildlist"
sitemap < "$buildlist"

get src txt > "$buildlist"
txt2html < "$buildlist"

get src html > "$buildlist"
build < "$buildlist"

cp "$styles" "$dest"
cp "$script" "$dest/$script.txt"