<?php
class MangareaderBridge extends BridgeAbstract {

	const MAINTAINER = 'logmanoriginal';
	const NAME = 'Mangareader Bridge';
	const URI = 'https://www.mangareader.net';
	const CACHE_TIMEOUT = 10800; // 3h
	const DESCRIPTION = 'Returns the latest updates, popular mangas or manga updates (new chapters)';

	const PARAMETERS = array(
		'Get latest updates' => array(),
		'Get popular mangas' => array(
			'category' => array(
				'name' => 'Category',
				'type' => 'list',
				'values' => array(
					'All' => 'all',
					'Action' => 'action',
					'Adventure' => 'adventure',
					'Comedy' => 'comedy',
					'Demons' => 'demons',
					'Drama' => 'drama',
					'Ecchi' => 'ecchi',
					'Fantasy' => 'fantasy',
					'Gender Bender' => 'gender-bender',
					'Harem' => 'harem',
					'Historical' => 'historical',
					'Horror' => 'horror',
					'Josei' => 'josei',
					'Magic' => 'magic',
					'Martial Arts' => 'martial-arts',
					'Mature' => 'mature',
					'Mecha' => 'mecha',
					'Military' => 'military',
					'Mystery' => 'mystery',
					'One Shot' => 'one-shot',
					'Psychological' => 'psychological',
					'Romance' => 'romance',
					'School Life' => 'school-life',
					'Sci-Fi' => 'sci-fi',
					'Seinen' => 'seinen',
					'Shoujo' => 'shoujo',
					'Shoujoai' => 'shoujoai',
					'Shounen' => 'shounen',
					'Shounenai' => 'shounenai',
					'Slice of Life' => 'slice-of-life',
					'Smut' => 'smut',
					'Sports' => 'sports',
					'Super Power' => 'super-power',
					'Supernatural' => 'supernatural',
					'Tragedy' => 'tragedy',
					'Vampire' => 'vampire',
					'Yaoi' => 'yaoi',
					'Yuri' => 'yuri'
				),
			'exampleValue' => 'All',
			'title' => 'Select your category'
			)
		),
		'Get manga updates' => array(
			'path' => array(
				'name' => 'Path',
				'required' => true,
				'pattern' => '[a-zA-Z0-9-_]*',
				'exampleValue' => 'bleach, umi-no-kishidan',
				'title' => 'URL part of desired manga'
			),
			'limit' => array(
				'name' => 'Limit',
				'type' => 'number',
				'defaultValue' => 10,
				'title' => 'Number of items to return [-1 returns all]'
			)
		)
	);

	private $request = '';

	public function collectData(){
		// We'll use the DOM parser for this as it makes navigation easier
		$html = getContents($this->getURI());
		if(!$html) {
			returnClientError('Could not receive data for ' . $path . '!');
		}
		libxml_use_internal_errors(true);
		$doc = new DomDocument;
		@$doc->loadHTML($html);
		libxml_clear_errors();

		// Navigate via XPath
		$xpath = new DomXPath($doc);

		$this->request = '';
		switch($this->queriedContext) {
		case 'Get latest updates':
			$this->request = 'Latest updates';
			$this->getLatestUpdates($xpath);
			break;
		case 'Get popular mangas':
			// Find manga name within "Popular mangas for ..."
			$pagetitle = $xpath->query(".//*[@id='bodyalt']/h1")->item(0)->nodeValue;
			$this->request = substr($pagetitle, 0, strrpos($pagetitle, ' -'));
			$this->getPopularMangas($xpath);
			break;
		case 'Get manga updates':
			$limit = $this->getInput('limit');
			if(empty($limit)) {
				$limit = self::PARAMETERS[$this->queriedContext]['limit']['defaultValue'];
			}

			$this->request = $xpath->query(".//*[@id='mangaproperties']//*[@class='aname']")
				->item(0)
				->nodeValue;

			$this->getMangaUpdates($xpath, $limit);
			break;
		}

		// Return some dummy-data if no content available
		if(empty($this->items)) {
			$item = array();
			$item['content'] = '<p>No updates available</p>';

			$this->items[] = $item;
		}
	}

	private function getLatestUpdates($xpath){
		// Query each item (consists of Manga + chapters)
		$nodes = $xpath->query("//*[@id='latestchapters']/table//td");

		foreach ($nodes as $node) {
			// Query the manga
			$manga = $xpath->query("a[@class='chapter']", $node)->item(0);

			// Collect the chapters for each Manga
			$chapters = $xpath->query("a[@class='chaptersrec']", $node);

			if (isset($manga) && $chapters->length >= 1) {
				$item = array();
				$item['uri'] = self::URI . htmlspecialchars($manga->getAttribute('href'));
				$item['title'] = htmlspecialchars($manga->nodeValue);

				// Add each chapter to the feed
				$item['content'] = '';

				foreach ($chapters as $chapter) {
					if($item['content'] <> '') {
						$item['content'] .= '<br>';
					}
					$item['content'] .= "<a href='"
						. self::URI
						. htmlspecialchars($chapter->getAttribute('href'))
						. "'>"
						. htmlspecialchars($chapter->nodeValue)
						. '</a>';
				}

				$this->items[] = $item;
			}
		}
	}

	private function getPopularMangas($xpath){
		// Query all mangas
		$mangas = $xpath->query("//*[@id='mangaresults']/*[@class='mangaresultitem']");

		foreach ($mangas as $manga) {

			// The thumbnail is encrypted in a css-style...
			// format: "background-image:url('<the part which is actually interesting>')"
			$mangaimgelement = $xpath->query(".//*[@class='imgsearchresults']", $manga)
				->item(0)
				->getAttribute('style');
			$thumbnail = substr($mangaimgelement, 22, strlen($mangaimgelement) - 24);

			$item = array();
			$item['title'] = htmlspecialchars($xpath->query(".//*[@class='manga_name']//a", $manga)
				->item(0)
				->nodeValue);
			$item['uri'] = self::URI . $xpath->query(".//*[@class='manga_name']//a", $manga)
				->item(0)
				->getAttribute('href');
			$item['author'] = htmlspecialchars($xpath->query("//*[@class='author_name']", $manga)
				->item(0)
				->nodeValue);
			$item['chaptercount'] = $xpath->query(".//*[@class='chapter_count']", $manga)
				->item(0)
				->nodeValue;
			$item['genre'] = htmlspecialchars($xpath->query(".//*[@class='manga_genre']", $manga)
				->item(0)
				->nodeValue);
			$item['content'] = <<<EOD
<a href="{$item['uri']}"><img src="{$thumbnail}" alt="{$item['title']}" /></a>
<p>{$item['genre']}</p>
<p>{$item['chaptercount']}</p>
EOD;
			$this->items[] = $item;
		}
	}

	private function getMangaUpdates($xpath, $limit){
		$query = "(.//*[@id='listing']//tr)[position() > 1]";

		if($limit !== -1) {
			$query = "(.//*[@id='listing']//tr)[position() > 1][position() > last() - {$limit}]";
		}

		$chapters = $xpath->query($query);

		foreach ($chapters as $chapter) {
			$item = array();
			$item['title'] = htmlspecialchars($xpath->query('td[1]', $chapter)
				->item(0)
				->nodeValue);
			$item['uri'] = self::URI . $xpath->query('td[1]/a', $chapter)
				->item(0)
				->getAttribute('href');
			$item['timestamp'] = strtotime($xpath->query('td[2]', $chapter)
				->item(0)
				->nodeValue);
			array_unshift($this->items, $item);
		}
	}

	public function getURI(){
		switch($this->queriedContext) {
		case 'Get latest updates':
			$path = 'latest';
			break;
		case 'Get popular mangas':
			$path = 'popular';
			if($this->getInput('category') !== 'all') {
				$path .= '/' . $this->getInput('category');
			}
			break;
		case 'Get manga updates':
			$path = $this->getInput('path');
			break;
		default: return parent::getURI();
		}
		return self::URI . '/' . $path;
	}

	public function getName(){
		return (!empty($this->request) ? $this->request . ' - ' : '') . 'Mangareader Bridge';
	}
}
