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<?php
declare(strict_types=1);
namespace Engelsystem\Helpers\Schedule;
use Carbon\Carbon;
use SimpleXMLElement;
class XmlParser
{
/** @var SimpleXMLElement */
protected $scheduleXML;
/** @var Schedule */
protected $schedule;
/**
* @param string $xml
* @return bool
*/
public function load(string $xml): bool
{
$this->scheduleXML = simplexml_load_string($xml);
if (!$this->scheduleXML) {
return false;
}
$this->parseXml();
return true;
}
/**
* Parse the predefined XML content
*/
protected function parseXml(): void
{
$version = $this->getFirstXpathContent('version');
$conference = new Conference(
$this->getFirstXpathContent('conference/title'),
$this->getFirstXpathContent('conference/acronym'),
$this->getFirstXpathContent('conference/start'),
$this->getFirstXpathContent('conference/end'),
(int)$this->getFirstXpathContent('conference/days'),
$this->getFirstXpathContent('conference/timeslot_duration'),
$this->getFirstXpathContent('conference/base_url')
);
$days = [];
foreach ($this->scheduleXML->xpath('day') as $day) {
$rooms = [];
foreach ($day->xpath('room') as $roomElement) {
$room = new Room(
(string)$roomElement->attributes()['name']
);
$events = $this->parseEvents($roomElement->xpath('event'), $room);
$room->setEvent($events);
$rooms[] = $room;
}
$days[] = new Day(
(string)$day->attributes()['date'],
new Carbon($day->attributes()['start']),
new Carbon($day->attributes()['end']),
(int)$day->attributes()['index'],
$rooms
);
}
$this->schedule = new Schedule(
$version,
$conference,
$days
);
}
/**
* @param SimpleXMLElement[] $eventElements
* @param Room $room
* @return array
*/
protected function parseEvents(array $eventElements, Room $room): array
{
$events = [];
foreach ($eventElements as $event) {
$persons = $this->getListFromSequence($event, 'persons', 'person', 'id');
$links = $this->getListFromSequence($event, 'links', 'link', 'href');
$attachments = $this->getListFromSequence($event, 'attachments', 'attachment', 'href');
$recording = '';
$recordingElement = $event->xpath('recording')[0];
if ($this->getFirstXpathContent('optout', $recordingElement) == 'false') {
$recording = $this->getFirstXpathContent('license', $recordingElement);
}
$events[] = new Event(
(string)$event->attributes()['guid'],
(int)$event->attributes()['id'],
$room,
$this->getFirstXpathContent('title', $event),
$this->getFirstXpathContent('subtitle', $event),
$this->getFirstXpathContent('type', $event),
new Carbon($this->getFirstXpathContent('date', $event)),
$this->getFirstXpathContent('start', $event),
$this->getFirstXpathContent('duration', $event),
$this->getFirstXpathContent('abstract', $event),
$this->getFirstXpathContent('slug', $event),
$this->getFirstXpathContent('track', $event),
$this->getFirstXpathContent('logo', $event) ?: null,
$persons,
$this->getFirstXpathContent('language', $event) ?: null,
$this->getFirstXpathContent('description', $event) ?: null,
$recording,
$links,
$attachments,
$this->getFirstXpathContent('url', $event) ?: null,
$this->getFirstXpathContent('video_download_url', $event) ?: null
);
}
return $events;
}
/**
* @param string $path
* @param SimpleXMLElement|null $xml
* @return string
*/
protected function getFirstXpathContent(string $path, ?SimpleXMLElement $xml = null): string
{
$element = ($xml ?: $this->scheduleXML)->xpath($path);
return $element ? (string)$element[0] : '';
}
/**
* Resolves a list from a sequence of elements
*
* @param SimpleXMLElement $element
* @param string $firstElement
* @param string $secondElement
* @param string $idAttribute
* @return array
*/
protected function getListFromSequence(
SimpleXMLElement $element,
string $firstElement,
string $secondElement,
string $idAttribute
): array {
$items = [];
foreach ($element->xpath($firstElement)[0]->xpath($secondElement) as $item) {
$items[(string)$item->attributes()[$idAttribute]] = (string)$item;
}
return $items;
}
/**
* @return Schedule
*/
public function getSchedule(): Schedule
{
return $this->schedule;
}
}
|
