<?php

// ------------------------------
//
// HTML Converter Core v0.2
//
// ------------------------------


require_once(join(DIRECTORY_SEPARATOR, array(
 __DIR__, '..', '..', 'phpQuery.php'
)));


abstract class HTMLConverter {
 public static function getURLDomain($_URL) {
 $_URL = explode('/', $_URL, 4);
 $_URL[0] = '';
 return join('/', array_slice($_URL, 0, 3));
 }

 private static function getDOMCharSet($_DOM) {
 $_Meta = $_DOM['meta[http-equiv="Content-Type"]'];

 if ( $_Meta->size() ) {
 preg_match(
 '/charset=([^;]+)/i', $_Meta->attr('content'), $_CharSet
 );
 return $_CharSet[1];
 }
 return $_DOM['meta[charset]']->attr('charset');
 }

 public $URL;
 public $domain;
 public $CharSet;
 public $DOM;
 public $content;
 public $title;
 public $rule;

 public function __construct($_URL, $_Selector = null, $_Rule) {
 if (substr(trim($_URL), 0, 1) != '<') {
 $this->URL = $_URL;
 $this->domain = self::getURLDomain($_URL);

 $this->DOM = phpQuery::newDocumentFile($_URL);
 $this->content = $this->DOM['body'];
 } else {
 $this->DOM = phpQuery::newDocumentHTML($_URL);
 $this->content = $this->DOM;
 }
 $this->CharSet = self::getDOMCharSet( $this->DOM );

 if (is_string( $_Selector )) {
 $_DOM = $this->content[ $_Selector ];
 if ( $_DOM->size() ) $this->content = $_DOM;
 }

 $_Title = $this->content->filter('h1');
 $_Title = $_Title->size() ? $_Title : $this->content['h1'];
 $this->title = $_Title->text();

 $this->rule = $_Rule;
 }

 private $link = array();

 private function innerLink($_URL) {
 $_URL = preg_replace('/^\/([^\/])/', '1ドル', $_URL);
 $_Host = parse_url($_URL, PHP_URL_HOST);

 if (empty( $_Host ))
 return parse_url($this->URL, PHP_URL_SCHEME) .
 ":{$this->domain}/{$_URL}";

 if (self::getURLDomain($_URL) == $this->domain)
 return $_URL;
 }

 public function __get($_Name) {
 if ($_Name != 'link') return;

 if (empty( $this->link )) {
 $this->link = array(
 'inner' => array(),
 'outer' => array()
 );
 foreach ($this->content['a[href]'] as $_Link) {
 $_HREF = $_Link->getAttribute('href');
 if ($_HREF[0] == '#') continue;

 $_InnerURL = $this->innerLink($_HREF);

 if ($_InnerURL) {
 $_Link->setAttribute('href', $_InnerURL);
 array_push($this->link['inner'], $_Link);
 } else
 array_push($this->link['outer'], $_Link);
 }
 }
 return $this->link;
 }

 public function convert() {
 $_Target = array();

 foreach ($this->rule as $_Selector => $_Callback)
 foreach ($this->content[$_Selector] as $_DOM) {/*
 array_push($_Target, $_DOM);
 }
 usort($_Target, function ($_A, $_B) {
 return pq($_A)->parents()->size() - pq($_B)->parents()->size();
 });

 foreach ($_Target as $_DOM) {*/
 $_DOM_ = pq($_DOM);/*

 foreach ($this->rule as $_Selector => $_Callback)
 if ($_DOM_->is( $_Selector )) {*/
 $_DOM_->html(call_user_func(
 $_Callback, trim( $_DOM_->html() ), $_DOM_
 ));/*
 break;
 }*/
 }
 return trim( $this->content->text() );
 }
}