Scrapes the PNWPHP Dryfta site and generates a COD-style JSON document of the sessions

pnwphp.php

<?php
define('URL_BASE', 'https://pnwphp2016.dryfta.com');

class PageRetriever {
	/** @var array */
	private $cache = [];
	/** @var resource */
	private $curl;

	public function __construct() {
		$this->curl = curl_init();
		curl_setopt($this->curl, CURLOPT_RETURNTRANSFER, true);
	}

	/**
	 * @param string $url
	 * @return string
	 */
	public function get($url) {
		if(isset($this->cache[$url])) {
			return $this->cache[$url];
		}
		curl_setopt($this->curl, CURLOPT_URL, $url);
		return $this->cache[$url] = curl_exec($this->curl);
	}
}

class Session {
	private $id;
	private $nid;
	private $title;
	private $abstract;
	private $type;
	private $presenter;
	private $category;
	private $session_type ;
	private $experience_level = 'all';
	private $room;
	private $date;
	private $start;
	private $end;

	/**
	 * @param string $id
	 * @param string $href Link to the session page
	 * @param PageRetriever $pr
	 */
	public function __construct($id, $href, PageRetriever $pr) {
		$this->id = $this->nid = $id;
		$doc = new DOMDocument();
		@$doc->loadHTML($pr->get($href));
		$finder = new DomXPath($doc);

		$this->title = trim($finder->query("//a[contains(@class,'sessionname')]")->item(0)->textContent);

		$spans = $finder->query("//span[contains(@class,'sessionformat')]");

		$date_text = $spans->item(0)->textContent;
		$this->date = date('Y-m-d', strtotime($date_text));
		$this->category = date('F d', strtotime($date_text));
		$times = explode('  -  ', trim($finder->query("//span[contains(@class,'session_type_dateB')]")->item(0)->textContent));
		$this->start = date('Y-m-d H:i:s', strtotime("$date_text {$times[0]}"));
		$this->end = date('Y-m-d H:i:s', strtotime("$date_text {$times[1]}"));

		$this->room = trim($finder->query("//span[contains(@class,'sessionvenue')]")->item(0)->textContent);

		$this->abstract = trim(strip_tags($doc->saveHTML($finder->query("//div[contains(@class,'sessiondisc')]")->item(0)->firstChild), '<a><del><ins><b><i><strong><em><big><small><br>'));

		$force_session = $finder->query("//span[contains(@class,'sessiontrack_name')]")->length;

		if($force_session || $spans->length > 1) {
			$this->session_type = $spans->length > 1 ? trim($spans->item(1)->textContent) : 'Session';
			if($this->session_type == 'Half-Day Workshop') {
				$this->type = 'workshop';
			} elseif($this->session_type == 'Special Event') {
				$this->type = 'keynote';
			} else {
				$this->type = 'session';
			}
			if($this->title == 'Final Thoughts') {
				$this->type = 'keynote';
				$this->session_type = 'Special Event';
			}

			$presenter_box = $finder->query("//div[contains(@class,'profile_dryfta_user_attendee')]")->item(0);
			$links = $finder->query('div/a', $presenter_box);
			if($finder->query('div/a', $presenter_box)->length) {
				$link = $links->item(0);
				/** @var DOMElement $link */
				$href = $link->getAttribute('href');
				preg_match('/\?id=(\d+)/', $href, $matches);
				$presenter = new Presenter($matches[1], $pr->get(URL_BASE . $href));
				$this->presenter = [$presenter->__toArray()];
			} else {
				$this->presenter = [];
			}
		} else {
			if(stripos($this->title, 'Lunch') !== false) {
				$this->type = 'lunch';
			} elseif(stripos($this->title, 'Networking') !== false || stripos($this->title, 'Reception') !== false) {
				$this->type = 'networking';
			} elseif(stripos($this->title, 'Registration') !== false) {
				$this->type = 'registration';
			} elseif(stripos($this->title, 'Raffle') !== false) {
				$this->type = 'fun';
			} else {
				$this->type = 'break';
			}
			$this->session_type = ucfirst($this->type);
			$this->presenter = [];
		}
	}

	/**
	 * @return array
	 */
	public function __toArray() {
		return get_object_vars($this);
	}
}

class Presenter {
	private $id;
	private $fullname;
	private $twitter;
	private $picture;
	private $bio;
	private $jobtitle;
	private $organization;
	private $interests;

	/**
	 * @param string $id
	 * @param string $html
	 */
	public function __construct($id, $html) {
		$this->id = $id;
		$doc = new DOMDocument();
		@$doc->loadHTML($html);
		$finder = new DomXPath($doc);

		$this->fullname = trim($doc->getElementsByTagName('h2')->item(0)->textContent);
		$this->jobtitle = trim($finder->query("//div[contains(@class,'dryfta_attendee_role')]")->item(0)->textContent);
		$this->organization = trim($finder->query("//div[contains(@class,'dryfta_attendee_orgnization')]")->item(0)->textContent);
		$this->picture = $doc->getElementById('prof_logo')->getAttribute('src');
		$twitter_icon = $finder->query("//i[contains(@class,'fa-twitter')]");
		if($twitter_icon->length) {
			$twitter_link = $twitter_icon->item(0)->parentNode->parentNode;
			/** @var DOMElement $twitter_link */
			$this->twitter = $twitter_link->getAttribute('href');
		}

		foreach($finder->query("//div[contains(@class,'submittedAbstracts')]") as $div) {
			if(stripos($div->textContent, 'Public Profile') !== false) {
				/** @var DOMElement $div */
				foreach($div->childNodes as $childNode) {
					if($childNode->tagName == 'b' && trim($childNode->textContent) == 'Public Profile') {
						$div->removeChild($childNode);
						break;
					}
				}
				$this->bio = trim($div->textContent);
			}
		}
	}

	/**
	 * @return array
	 */
	public function __toArray() {
		return get_object_vars($this);
	}
}

$doc = new DOMDocument();
@$doc->loadHTMLFile('https://pnwphp2016.dryfta.com/en/program-schedule');

$finder = new DomXPath($doc);

$session_links = [];
foreach($finder->query("//dl[@id='menu-pane']//div[contains(@class,'session_type_section')]") as $node) {
	foreach($finder->query('div//a', $node) as $link) {
		/** @var DOMElement $link */
		if(in_array(trim($link->textContent), ['Add to gCal', 'Add to iCal'])) {
			continue;
		}
		preg_match('/\/program\/(\d+)\//', $link->getAttribute('href'), $matches);
		$session_links[$matches[1]] = URL_BASE . $link->getAttribute('href');
		break;
	}
}

$pr = new PageRetriever();
$output = [];
foreach($session_links as $id => $link) {
	$session = new Session($id, $link, $pr);
	$output[] = $session->__toArray();
}
header('Content-type: application/json');
echo json_encode($output, JSON_NUMERIC_CHECK | JSON_UNESCAPED_UNICODE);