<?php

// ------------------------------
//
// HTML to MarkDown v0.1
//
// ------------------------------


class HTML_MarkDown extends HTMLConverter {
 public function getTitleAttr($_DOM) {
 $_Title = ' "' . $_DOM->attr('title') . '"';
 return (count($_Title) > 3) ? $_Title : '';
 }

 public function __construct($_URL, $_Selector = null, $_Rule = array()) {
 $_This = $this;

 parent::__construct($_URL, $_Selector, array_merge(array(
 'h1, h2, h3, h4, h5, h6' => function ($_HTML, $_DOM) {
 return "\n\n" . str_repeat('#', $_DOM->get(0)->tagName[1]) .
 " {$_HTML}";
 },
 'em' => function ($_HTML) {
 return " *{$_HTML}*";
 },
 'b, strong' => function ($_HTML) {
 return " **{$_HTML}**";
 },
 'del' => function ($_HTML) {
 return " ~~{$_HTML}~~";
 },
 'a[href]' => function ($_HTML, $_DOM) use ($_This) {
 return "[{$_HTML}](" . $_DOM->attr('href') .
 $_This->getTitleAttr($_DOM) . ')';
 },
 'ul > li' => function ($_HTML) {
 return "\n - {$_HTML}";
 },
 'ol > li' => function ($_HTML, $_DOM) {
 return "\n " . ($_DOM->prevAll()->size() + 1) . ". {$_HTML}";
 },
 'img' => function ($_HTML, $_DOM) use ($_This) {
 return '![' . $_DOM->attr('alt') . '](' . $_DOM->attr('src') .
 $_This->getTitleAttr($_DOM) . ')';
 },
 'hr' => function ($_HTML, $_DOM) {
 return "\n\n" . (
 preg_match(
 '/page-break-after:\s*always/i', $_DOM->attr('style')
 ) ?
 '[========]' : '---'
 ) . "\n\n";
 },
 'p' => function ($_HTML) {
 return "\n\n{$_HTML}\n\n";
 },
 'pre' => function ($_HTML) {
 return "\n> {$_HTML}";
 },
 'code' => function ($_HTML) {
 return " `{$_HTML}` ";
 },
 'pre > code' => function ($_HTML) {
 return "\n```\n{$_HTML}\n```\n";
 },
 'table' => function ($_HTML) {
 return "\n\n{$_HTML}";
 },
 'tr' => function ($_HTML, $_DOM) {
 $_Code = "\n" . trim(
 preg_replace('/(\s*<.+?>\s*)+/', ' | ', $_HTML)
 );
 $_TR = $_DOM->parents('table')->eq(0)->find('tr');

 if (! $_TR->index($_DOM))
 $_Code .= "\n" . trim(join(' | ', array_fill(
 0, $_TR->eq(1)->children()->size() + 2, '-----'
 )), '- ');

 return $_Code;
 }
 ), $_Rule));
 }
}