#!/bin/bash
set -e
cd "$(dirname "$0")"
if ! [ -e one-section-per-line.txt ] || ! [ -e bookmark.txt ]; then
    echo "Please run $(dirname "$0")/init first to initialise the book"
    exit 1; fi
head -"$(cat bookmark.txt)" one-section-per-line.txt | tail -1 |
    sed 's,<p>,\n\n,g;s,</p>,,g;s,</*em>,*,g;s,<h1>,\n# ,g;s,<h2>,\n## ,g;s,<h3>,\n### ,g;s,<h4>,\n#### ,g;s,</h[1-4]>,,g'

echo
if [ "$(cat bookmark.txt)" -lt "$(wc -l < one-section-per-line.txt)" ]; then
    echo "Run $(dirname "$0")/next to read on."
fi
if [ $(cat bookmark.txt) -gt 1 ]; then
    echo "Run $(dirname "$0")/prev to go back."
    echo "Run $(dirname "$0")/init to restart."
fi