<?php

class SkimfeedBridge extends BridgeAbstract {

	const CONTEXT_NEWS_BOX = 'News box';
	const CONTEXT_HOT_TOPICS = 'Hot topics';
	const CONTEXT_TECH_NEWS = 'Tech news';
	const CONTEXT_CUSTOM = 'Custom feed';

	const NAME = 'Skimfeed Bridge';
	const URI = 'https://skimfeed.com';
	const DESCRIPTION = 'Returns feeds from Skimfeed, also supports custom feeds!';
	const MAINTAINER = 'logmanoriginal';
	const CACHE_TIMEOUT = 3600;

	const PARAMETERS = array(
		self::CONTEXT_NEWS_BOX => array( // auto-generated (see below)
			'box_channel' => array(
				'name' => 'Channel',
				'type' => 'list',
				'title' => 'Select your channel',
				'values' => array(
					'Hacker News' => '/news/hacker-news.html',
					'QZ' => '/news/qz.html',
					'The Verge' => '/news/the-verge.html',
					'Slashdot' => '/news/slashdot.html',
					'Lifehacker' => '/news/lifehacker.html',
					'Gizmag' => '/news/gizmag.html',
					'Fast Company' => '/news/fast-company.html',
					'Engadget' => '/news/engadget.html',
					'Wired' => '/news/wired.html',
					'MakeUseOf' => '/news/makeuseof.html',
					'Techcrunch' => '/news/techcrunch.html',
					'Apple Insider' => '/news/apple-insider.html',
					'ArsTechnica' => '/news/arstechnica.html',
					'Tech in Asia' => '/news/tech-in-asia.html',
					'FastCoExist' => '/news/fastcoexist.html',
					'Digital Trends' => '/news/digital-trends.html',
					'AnandTech' => '/news/anandtech.html',
					'How to Geek' => '/news/how-to-geek.html',
					'Geek' => '/news/geek.html',
					'BBC Technology' => '/news/bbc-technology.html',
					'Extreme Tech' => '/news/extreme-tech.html',
					'Packet Storm Sec' => '/news/packet-storm-sec.html',
					'MedGadget' => '/news/medgadget.html',
					'Design' => '/news/design.html',
					'The Next Web' => '/news/the-next-web.html',
					'Bit-Tech' => '/news/bit-tech.html',
					'Next Big Future' => '/news/next-big-future.html',
					'A VC' => '/news/a-vc.html',
					'Copyblogger' => '/news/copyblogger.html',
					'Smashing Mag' => '/news/smashing-mag.html',
					'Continuations' => '/news/continuations.html',
					'Cult of Mac' => '/news/cult-of-mac.html',
					'SecuriTeam' => '/news/securiteam.html',
					'The Tech Block' => '/news/the-tech-block.html',
					'BetaBeat' => '/news/betabeat.html',
					'PC Mag' => '/news/pc-mag.html',
					'Venture Beat' => '/news/venture-beat.html',
					'ReadWriteWeb' => '/news/readwriteweb.html',
					'High Scalability' => '/news/high-scalability.html',
				)
			)
		),
		self::CONTEXT_HOT_TOPICS => array(),
		self::CONTEXT_TECH_NEWS => array( // auto-generated (see below)
			'tech_channel' => array(
				'name' => 'Tech channel',
				'type' => 'list',
				'title' => 'Select your tech channel',
				'values' => array(
					'Agg' => array(
						'Reddit' => '/news/reddit.html',
						'Tech Insider' => '/news/tech-insider.html',
						'Digg' => '/news/digg.html',
						'Meta Filter' => '/news/meta-filter.html',
						'Fark' => '/news/fark.html',
						'Mashable' => '/news/mashable.html',
						'Ad Week' => '/news/ad-week.html',
						'The Chive' => '/news/the-chive.html',
						'BoingBoing' => '/news/boingboing.html',
						'Vice' => '/news/vice.html',
						'ClientsFromHell' => '/news/clientsfromhell.html',
						'How Stuff Works' => '/news/how-stuff-works.html',
						'Buzzfeed' => '/news/buzzfeed.html',
						'BoingBoing' => '/news/boingboing.html',
						'Cracked' => '/news/cracked.html',
						'Weird News' => '/news/weird-news.html',
						'ITOTD' => '/news/itotd.html',
						'Metafilter' => '/news/metafilter.html',
						'TheOnion' => '/news/theonion.html',
					),
					'Cars' => array(
						'Reddit Cars' => '/news/reddit-cars.html',
						'NYT Auto' => '/news/nyt-auto.html',
						'Truth About Cars' => '/news/truth-about-cars.html',
						'AutoBlog' => '/news/autoblog.html',
						'AutoSpies' => '/news/autospies.html',
						'Autoweek' => '/news/autoweek.html',
						'The Garage' => '/news/the-garage.html',
						'Car and Driver' => '/news/car-and-driver.html',
						'EGM Car Tech' => '/news/egm-car-tech.html',
						'Top Gear' => '/news/top-gear.html',
						'eGarage' => '/news/egarage.html',
					),
					'Comics' => array(
						'Penny Arcade' => '/news/penny-arcade.html',
						'XKCD' => '/news/xkcd.html',
						'Channelate' => '/news/channelate.html',
						'Savage Chicken' => '/news/savage-chicken.html',
						'Dinosaur Comics' => '/news/dinosaur-comics.html',
						'Explosm' => '/news/explosm.html',
						'PoorlyDLines' => '/news/poorlydlines.html',
						'Moonbeard' => '/news/moonbeard.html',
						'Nedroid' => '/news/nedroid.html',
					),
					'Design' => array(
						'FastCoCreate' => '/news/fastcocreate.html',
						'Dezeen' => '/news/dezeen.html',
						'Design Boom' => '/news/design-boom.html',
						'Mmminimal' => '/news/mmminimal.html',
						'We Heart' => '/news/we-heart.html',
						'CreativeBloq' => '/news/creativebloq.html',
						'TheDSGNblog' => '/news/thedsgnblog.html',
						'Grainedit' => '/news/grainedit.html',
					),
					'Football' => array(
						'Mail Football' => '/news/mail-football.html',
						'Yahoo Football' => '/news/yahoo-football.html',
						'FourFourTwo' => '/news/fourfourtwo.html',
						'Goal' => '/news/goal.html',
						'BBC Football' => '/news/bbc-football.html',
						'TalkSport' => '/news/talksport.html',
						'101 Great Goals' => '/news/101-great-goals.html',
						'Who Scored' => '/news/who-scored.html',
						'Football365 Champ' => '/news/football365-champ.html',
						'Football365 Premier' => '/news/football365-premier.html',
						'BleacherReport' => '/news/bleacherreport.html',
					),
					'Gaming' => array(
						'Polygon' => '/news/polygon.html',
						'Gamespot' => '/news/gamespot.html',
						'RockPaperShotgun' => '/news/rockpapershotgun.html',
						'VG247' => '/news/vg247.html',
						'IGN' => '/news/ign.html',
						'Reddit Games' => '/news/reddit-games.html',
						'TouchArcade' => '/news/toucharcade.html',
						'GamesRadar' => '/news/gamesradar.html',
						'Siliconera' => '/news/siliconera.html',
						'Reddit GameDeals' => '/news/reddit-gamedeals.html',
						'Joystiq' => '/news/joystiq.html',
						'GameInformer' => '/news/gameinformer.html',
						'PSN Blog' => '/news/psn-blog.html',
						'Reddit GamerNews' => '/news/reddit-gamernews.html',
						'Steam' => '/news/steam.html',
						'DualShockers' => '/news/dualshockers.html',
						'ShackNews' => '/news/shacknews.html',
						'CheapAssGamer' => '/news/cheapassgamer.html',
						'Eurogamer' => '/news/eurogamer.html',
						'Major Nelson' => '/news/major-nelson.html',
						'Reddit Truegaming' => '/news/reddit-truegaming.html',
						'GameTrailers' => '/news/gametrailers.html',
						'GamaSutra' => '/news/gamasutra.html',
						'USGamer' => '/news/usgamer.html',
						'Shoryuken' => '/news/shoryuken.html',
						'Destructoid' => '/news/destructoid.html',
						'ArsGaming' => '/news/arsgaming.html',
						'XBOX Blog' => '/news/xbox-blog.html',
						'GiantBomb' => '/news/giantbomb.html',
						'VideoGamer' => '/news/videogamer.html',
						'Pocket Tactics' => '/news/pocket-tactics.html',
						'WiredGaming' => '/news/wiredgaming.html',
						'AllGamesBeta' => '/news/allgamesbeta.html',
						'OnGamers' => '/news/ongamers.html',
						'Reddit GameBundles' => '/news/reddit-gamebundles.html',
						'Kotaku' => '/news/kotaku.html',
						'PCGamer' => '/news/pcgamer.html',
					),
					'Investing' => array(
						'Seeking Alpha' => '/news/seeking-alpha.html',
						'BBC Business' => '/news/bbc-business.html',
						'Harvard Biz' => '/news/harvard-biz.html',
						'Market Watch' => '/news/market-watch.html',
						'Investor Place' => '/news/investor-place.html',
						'Money Week' => '/news/money-week.html',
						'Moneybeat' => '/news/moneybeat.html',
						'Dealbook' => '/news/dealbook.html',
						'Economist Business' => '/news/economist-business.html',
						'Economist' => '/news/economist.html',
						'Economist CN' => '/news/economist-cn.html',
					),
					'Long' => array(
						'The Atlantic' => '/news/the-atlantic.html',
						'Reddit Long' => '/news/reddit-long.html',
						'Paris Review' => '/news/paris-review.html',
						'New Yorker' => '/news/new-yorker.html',
						'LongForm' => '/news/longform.html',
						'LongReads' => '/news/longreads.html',
						'The Browser' => '/news/the-browser.html',
						'The Feature' => '/news/the-feature.html',
					),
					'MMA' => array(
						'MMA Weekly' => '/news/mma-weekly.html',
						'MMAFighting' => '/news/mmafighting.html',
						'Reddit MMA' => '/news/reddit-mma.html',
						'Sherdog Articles' => '/news/sherdog-articles.html',
						'FightLand Vice' => '/news/fightland-vice.html',
						'Sherdog Forum' => '/news/sherdog-forum.html',
						'MMA Junkie' => '/news/mma-junkie.html',
						'Sherdog MMA Video' => '/news/sherdog-mma-video.html',
						'BloodyElbow' => '/news/bloodyelbow.html',
						'CageWriter' => '/news/cagewriter.html',
						'Sherdog News' => '/news/sherdog-news.html',
						'MMAForum' => '/news/mmaforum.html',
						'MMA Junkie Radio' => '/news/mma-junkie-radio.html',
						'UFC News' => '/news/ufc-news.html',
						'FightLinker' => '/news/fightlinker.html',
						'Bodybuilding MMA' => '/news/bodybuilding-mma.html',
						'BleacherReport MMA' => '/news/bleacherreport-mma.html',
						'FiveOuncesofPain' => '/news/fiveouncesofpain.html',
						'Sherdog Pictures' => '/news/sherdog-pictures.html',
						'CagePotato' => '/news/cagepotato.html',
						'Sherdog Radio' => '/news/sherdog-radio.html',
						'ProMMARadio' => '/news/prommaradio.html',
					),
					'Mobile' => array(
						'Macrumors' => '/news/macrumors.html',
						'Android Police' => '/news/android-police.html',
						'GSM Arena' => '/news/gsm-arena.html',
						'DigiTrend Mobile' => '/news/digitrend-mobile.html',
						'Mobile Nation' => '/news/mobile-nation.html',
						'TechRadar' => '/news/techradar.html',
						'ZDNET Mobile' => '/news/zdnet-mobile.html',
						'MacWorld' => '/news/macworld.html',
						'Android Dev Blog' => '/news/android-dev-blog.html',
					),
					'News' => array(
						'Daily Mail' => '/news/daily-mail.html',
						'Business Insider' => '/news/business-insider.html',
						'The Guardian' => '/news/the-guardian.html',
						'Fox' => '/news/fox.html',
						'BBC World' => '/news/bbc-world.html',
						'MSNBC' => '/news/msnbc.html',
						'ABC News' => '/news/abc-news.html',
						'Al Jazeera' => '/news/al-jazeera.html',
						'Business Insider India' => '/news/business-insider-india.html',
						'Observer' => '/news/observer.html',
						'NYT Tech' => '/news/nyt-tech.html',
						'NYT World' => '/news/nyt-world.html',
						'CNN' => '/news/cnn.html',
						'Japan Times' => '/news/japan-times.html',
						'WorldCrunch' => '/news/worldcrunch.html',
						'Pro publica' => '/news/pro-publica.html',
						'OZY' => '/news/ozy.html',
						'Times of India' => '/news/times-of-india.html',
						'The Australian' => '/news/the-australian.html',
						'Harpers' => '/news/harpers.html',
						'Moscow Times' => '/news/moscow-times.html',
						'The Times' => '/news/the-times.html',
						'Reuters Tech' => '/news/reuters-tech.html',
					),
					'Politics' => array(
						'FreeRepublic' => '/news/freerepublic.html',
						'Salon' => '/news/salon.html',
						'DrudgeReport' => '/news/drudgereport.html',
						'TheHill' => '/news/thehill.html',
						'TheBlaze' => '/news/theblaze.html',
						'InfoWars' => '/news/infowars.html',
						'New Republic' => '/news/new-republic.html',
						'WashTimes' => '/news/washtimes.html',
						'RealCleanPol' => '/news/realcleanpol.html',
						'Fact Check' => '/news/fact-check.html',
						'DailyKos' => '/news/dailykos.html',
						'NewsMax' => '/news/newsmax.html',
						'Politico' => '/news/politico.html',
						'Michelle Malkin' => '/news/michelle-malkin.html',
					),
					'Reddit' => array(
						'R Movies' => '/news/r-movies.html',
						'R News' => '/news/r-news.html',
						'Futurology' => '/news/futurology.html',
						'R All' => '/news/r-all.html',
						'R Music' => '/news/r-music.html',
						'R Askscience' => '/news/r-askscience.html',
						'R Technology' => '/news/r-technology.html',
						'R Bestof' => '/news/r-bestof.html',
						'R Askreddit' => '/news/r-askreddit.html',
						'R Worldnews' => '/news/r-worldnews.html',
						'R Explainlikeimfive' => '/news/r-explainlikeimfive.html',
						'R Iama' => '/news/r-iama.html',
					),
					'Science' => array(
						'PhysOrg' => '/news/physorg.html',
						'Hack-a-day' => '/news/hack-a-day.html',
						'Reddit Science' => '/news/reddit-science.html',
						'Stats Blog' => '/news/stats-blog.html',
						'Flowing Data' => '/news/flowing-data.html',
						'Eureka Alert' => '/news/eureka-alert.html',
						'Robotics BizRev' => '/news/robotics-bizrev.html',
						'Planet big Data' => '/news/planet-big-data.html',
						'Makezine' => '/news/makezine.html',
						'MIT Tech' => '/news/mit-tech.html',
						'R Bloggers' => '/news/r-bloggers.html',
						'DataIsBeautiful' => '/news/dataisbeautiful.html',
						'Ted Videos' => '/news/ted-videos.html',
						'Advanced Science' => '/news/advanced-science.html',
						'Robotiq' => '/news/robotiq.html',
						'Science Daily' => '/news/science-daily.html',
						'IEEE Robotics' => '/news/ieee-robotics.html',
						'PSFK' => '/news/psfk.html',
						'Discover Magazine' => '/news/discover-magazine.html',
						'DataTau' => '/news/datatau.html',
						'RoboHub' => '/news/robohub.html',
						'Discovery' => '/news/discovery.html',
						'Smart Data' => '/news/smart-data.html',
						'Whats Big Data' => '/news/whats-big-data.html',
					),
					'Tech' => array(
						'Hacker News' => '/news/hacker-news.html',
						'The Verge' => '/news/the-verge.html',
						'Lifehacker' => '/news/lifehacker.html',
						'Fast Company' => '/news/fast-company.html',
						'ArsTechnica' => '/news/arstechnica.html',
						'MakeUseOf' => '/news/makeuseof.html',
						'FastCoExist' => '/news/fastcoexist.html',
						'How to Geek' => '/news/how-to-geek.html',
						'The Next Web' => '/news/the-next-web.html',
						'Engadget' => '/news/engadget.html',
						'Gizmag' => '/news/gizmag.html',
						'QZ' => '/news/qz.html',
						'Wired' => '/news/wired.html',
						'Techcrunch' => '/news/techcrunch.html',
						'Slashdot' => '/news/slashdot.html',
						'Extreme Tech' => '/news/extreme-tech.html',
						'AnandTech' => '/news/anandtech.html',
						'Digital Trends' => '/news/digital-trends.html',
						'Next Big Future' => '/news/next-big-future.html',
						'Apple Insider' => '/news/apple-insider.html',
						'Geek' => '/news/geek.html',
						'BBC Technology' => '/news/bbc-technology.html',
						'Bit-Tech' => '/news/bit-tech.html',
						'Packet Storm Sec' => '/news/packet-storm-sec.html',
						'Design' => '/news/design.html',
						'High Scalability' => '/news/high-scalability.html',
						'Smashing Mag' => '/news/smashing-mag.html',
						'The Tech Block' => '/news/the-tech-block.html',
						'A VC' => '/news/a-vc.html',
						'Tech in Asia' => '/news/tech-in-asia.html',
						'ReadWriteWeb' => '/news/readwriteweb.html',
						'PC Mag' => '/news/pc-mag.html',
						'Continuations' => '/news/continuations.html',
						'Copyblogger' => '/news/copyblogger.html',
						'Cult of Mac' => '/news/cult-of-mac.html',
						'BetaBeat' => '/news/betabeat.html',
						'MedGadget' => '/news/medgadget.html',
						'SecuriTeam' => '/news/securiteam.html',
						'Venture Beat' => '/news/venture-beat.html',
					),
					'Trend' => array(
						'Trend Hunter' => '/news/trend-hunter.html',
						'ApartmentT' => '/news/apartmentt.html',
						'GQ' => '/news/gq.html',
						'Digital Trends' => '/news/digital-trends.html',
						'Cool Hunting' => '/news/cool-hunting.html',
						'FastCoDesign' => '/news/fastcodesign.html',
						'TC Startups' => '/news/tc-startups.html',
						'Killer Startups' => '/news/killer-startups.html',
						'DigiInfo' => '/news/digiinfo.html',
						'New Startups' => '/news/new-startups.html',
						'DigiTrends' => '/news/digitrends.html',
					),
					'Watches' => array(
						'Hodinkee' => '/news/hodinkee.html',
						'Quill and Pad' => '/news/quill-and-pad.html',
						'Monochrome' => '/news/monochrome.html',
						'Deployant' => '/news/deployant.html',
						'Watches by SJX' => '/news/watches-by-sjx.html',
						'Fratello Watches' => '/news/fratello-watches.html',
						'A Blog to Watch' => '/news/a-blog-to-watch.html',
						'Wound for Life' => '/news/wound-for-life.html',
						'Watch Paper' => '/news/watch-paper.html',
						'Watch Report' => '/news/watch-report.html',
						'Perpetuelle' => '/news/perpetuelle.html',
					),
					'Youtube' => array(
						'LinusTechTips' => '/news/linustechtips.html',
						'MetalJesusRocks' => '/news/metaljesusrocks.html',
						'TotalBiscuit' => '/news/totalbiscuit.html',
						'DexBonus' => '/news/dexbonus.html',
						'Lon Siedman' => '/news/lon-siedman.html',
						'MKBHD' => '/news/mkbhd.html',
						'Terry A Davis' => '/news/terry-a-davis.html',
						'HappyConsole' => '/news/happyconsole.html',
						'Austin Evans' => '/news/austin-evans.html',
						'NCIX' => '/news/ncix.html',
					),
				)
			),
		),
		self::CONTEXT_CUSTOM => array(
			'config' => array(
				'name' => 'Configuration',
				'type' => 'text',
				'required' => true,
				'title' => 'Enter feed numbers from Skimfeed!',
				'exampleValue' => '5,8,2,l,p,9,23'
			)
		),
		'global' => array(
			'limit' => array(
				'name' => 'Limit',
				'type' => 'number',
				'title' => 'Limits the number of returned items in the feed',
				'exampleValue' => 10
			)
		)
	);

	public function getURI() {

		switch($this->queriedContext) {

			case self::CONTEXT_NEWS_BOX:

				$channel = $this->getInput('box_channel');

				if($channel) {
					return static::URI . $channel;
				}

				break;

			case self::CONTEXT_HOT_TOPICS:
				return static::URI;

			case self::CONTEXT_TECH_NEWS:

				$channel = $this->getInput('tech_channel');

				if($channel) {
					return static::URI . $channel;
				}

				break;

			case self::CONTEXT_CUSTOM:

				$config = $this->getInput('config');

				return static::URI . '/custom.php?f=' . urlencode($config);

		}

		return parent::getURI();

	}

	public function detectParameters($url) {

		if (0 !== strpos($url, static::URI)) {
			return null;
		}

		foreach(self::PARAMETERS as $channels) {

			foreach($channels as $box_name => $box) {

				foreach($box['values'] as $name => $channel_url) {

					if (static::URI . $channel_url === $url) {
						return array(
							$box_name => $name,
						);

					}

				}

			}

		}

		return null;

	}

	public function getName() {

		switch($this->queriedContext) {

			case self::CONTEXT_NEWS_BOX:

				$channel = $this->getInput('box_channel');

				$title = array_search(
					$channel,
					static::PARAMETERS[self::CONTEXT_NEWS_BOX]['box_channel']['values']
				);

				return $title . ' - ' . static::NAME;

			case self::CONTEXT_HOT_TOPICS:
				return 'Hot topics - ' . static::NAME;

			case self::CONTEXT_TECH_NEWS:

				$channel = $this->getInput('tech_channel');

				$titles = array();

				foreach(static::PARAMETERS[self::CONTEXT_TECH_NEWS]['tech_channel']['values'] as $ch) {
					$titles = array_merge($titles, $ch);
				}

				$title = array_search($channel, $titles);

				return $title . ' - ' . static::NAME;

			case self::CONTEXT_CUSTOM:
				return 'Custom - ' . static::NAME;

		}

		return parent::getName();

	}

	public function collectData() {

		// enable to export parameter lists
		// $this->exportBoxChannels(); die;
		// $this->exportTechChannels(); die;

		$html = getSimpleHTMLDOM($this->getURI())
			or returnServerError('Request to ' . $this->getURI() . ' failed!');

		defaultLinkTo($html, static::URI);

		switch($this->queriedContext) {

			case self::CONTEXT_NEWS_BOX:

				$author = array_search(
					$this->getInput('box_channel'),
					static::PARAMETERS[self::CONTEXT_NEWS_BOX]['box_channel']['values']
				);

				$author = '<a href="'
				. $this->getURI()
				. '">'
				. $author
				. '</a>';

				$this->extractFeed($html, $author);
				break;

			case self::CONTEXT_HOT_TOPICS:
				$this->extractHotTopics($html);
				break;

			case self::CONTEXT_TECH_NEWS:
				$authors = array();

				foreach(static::PARAMETERS[self::CONTEXT_TECH_NEWS]['tech_channel']['values'] as $ch) {
					$authors = array_merge($authors, $ch);
				}

				$author = '<a href="'
				. $this->getURI()
				. '">'
				. array_search($this->getInput('tech_channel'),	$authors)
				. '</a>';

				$this->extractFeed($html, $author);
				break;

			case self::CONTEXT_CUSTOM:
				$this->extractCustomFeed($html);
				break;

		}

	}

	private function extractFeed($html, $author) {

		$articles = $html->find('li')
			or returnServerError('Could not find articles!');

		if(count($articles) === 1
		&& stristr($articles[0]->plaintext, 'Nothing new in the last 48 hours')) {
			return; // Nothing to show
		}

		$limit = $this->getInput('limit') ?: -1;

		foreach($articles as $article) {

			$anchor = $article->find('a', 0)
				or returnServerError('Could not find anchor!');

			$item = array();

			$item['uri'] = $this->getTarget($anchor);
			$item['title'] = trim($anchor->plaintext);

			// The timestamp is encoded as relative time (max. the last 48 hours)
			// like this: "- 7 hours". It should always be at the end of the article:
			$age = substr($article->plaintext, strrpos($article->plaintext, '-'));

			$item['timestamp'] = strtotime($age);
			$item['author'] = $author;

			$this->items[] = $item;

			if($limit > 0 && count($this->items) >= $limit) {
				return;
			}

		}

	}

	private function extractHotTopics($html) {

		$topics = $html->find('#popbox ul li')
			or returnServerError('Could not find topics!');

		$limit = $this->getInput('limit') ?: -1;

		foreach($topics as $topic) {

			$anchor = $topic->find('a', 0)
				or returnServerError('Could not find anchor!');

			$item = array();

			$item['uri'] = $this->getTarget($anchor);
			$item['title'] = $anchor->title;

			$this->items[] = $item;

			if($limit > 0 && count($this->items) >= $limit) {
				return;
			}

		}

	}

	private function extractCustomFeed($html) {

		$boxes = $html->find('#boxx .boxes')
			or returnServerError('Could not find boxes!');

		foreach($boxes as $box) {

			$anchor = $box->find('span.boxtitles a', 0)
				or returnServerError('Could not find box anchor!');

			$author	= '<a href="' . $anchor->href . '">' . trim($anchor->plaintext) . '</a>';
			$uri	= $anchor->href;

			$box_html = getSimpleHTMLDOM($uri)
				or returnServerError('Could not load custom feed!');

			$this->extractFeed($box_html, $author);

		}

	}

	private function getTarget($anchor) {

		// Anchors are linked to Skimfeed, luckily the target URI is encoded
		// in that URI via '&u=<URI>':
		$query = parse_url($anchor->href, PHP_URL_QUERY);

		foreach(explode('&', $query) as $parameter) {

			list($key, $value) = explode('=', $parameter);

			if($key !== 'u') {
				continue;
			}

			return urldecode($value);

		}

	}

	/**
	 * dev-mode!
	 * Requires '&format=Html'
	 *
	 * Returns the 'box' array from the source site
	 */
	private function exportBoxChannels() {
		$html = getSimpleHTMLDOMCached(static::URI)
			or returnServerError('No contents received from Skimfeed!');

		if(!$this->isCompatible($html)) {
			returnServerError('Skimfeed version is not compatible!');
		}

		$boxes = $html->find('#boxx .boxes')
			or returnServerError('Could not find boxes!');

		// begin of 'channel' list
		$message = <<<EOD
'box_channel' => array(
	'name' => 'Channel',
	'type' => 'list',
	'required' => true,
	'title' => 'Select your channel',
	'values' => array(

EOD;

		foreach($boxes as $box) {

			$anchor = $box->find('span.boxtitles a', 0)
				or returnServerError('Could not find box anchor!');

			$title	= trim($anchor->plaintext);
			$uri	= $anchor->href;

			// add value
			$message .= "\t\t'{$title}' => '{$uri}', \n";

		}

		// end of 'box' list
		$message .= <<<EOD
	)
),
EOD;

	echo <<<EOD
<!DOCTYPE html>

<html>
	<body>
		<code style="white-space: pre-wrap;">{$message}</code>
	</body>
</html>
EOD;

	}

	/**
	 * dev-mode!
	 * Requires '&format=Html'
	 *
	 * Returns the 'techs' array from the source site
	 */
	private function exportTechChannels() {
		$html = getSimpleHTMLDOMCached(static::URI)
			or returnServerError('No contents received from Skimfeed!');

		if(!$this->isCompatible($html)) {
			returnServerError('Skimfeed version is not compatible!');
		}

		$channels = $html->find('#menubar a')
			or returnServerError('Could not find channels!');

		// begin of 'tech_channel' list
		$message = <<<EOD
'tech_channel' => array(
	'name' => 'Tech channel',
	'type' => 'list',
	'required' => true,
	'title' => 'Select your tech channel',
	'values' => array(

EOD;

		foreach($channels as $channel) {

			if($channel->href === '#'
			|| $channel->class === 'homelink'
			|| $channel->plaintext === 'Twitter'
			|| $channel->plaintext === 'Weather'
			|| $channel->plaintext === '+Custom') {
				continue;
			}

			$title	= trim($channel->plaintext);
			$uri	= '/' . $channel->href;

			$message .= "\t\t'{$title}' => array(\n";

			$channel_html = getSimpleHTMLDOMCached(static::URI . $uri)
				or returnServerError('Could not load tech channel ' . $channel->plaintext . '!');

			$boxes = $channel_html->find('#boxx .boxes')
				or returnServerError('Could not find boxes!');

			foreach($boxes as $box) {

				$anchor = $box->find('span.boxtitles a', 0)
					or returnServerError('Could not find box anchor!');

				$boxtitle	= trim($anchor->plaintext);
				$boxuri		= $anchor->href;

				$message .= "\t\t\t'{$boxtitle}' => '{$boxuri}', \n";

			}

			$message .= "\t\t),\n";

		}

		// end of 'box' list
		$message .= <<<EOD
	)
),
EOD;

	echo <<<EOD
<!DOCTYPE html>

<html>
	<body>
		<code style="white-space: pre-wrap;">{$message}</code>
	</body>
</html>
EOD;
	}

	/**
	 * Checks if the reported skimfeed version is compatible
	 */
	private function isCompatible($html) {
		$title = $html->find('title', 0);

		if(!$title) {
			return false;
		}

		if($title->plaintext === 'Skimfeed V5.5 - Tech News') {
			return true;
		}

		return false;
	}
}
