From 42721e95726559b4a601240bb5b0fe4e5d755b2a Mon Sep 17 00:00:00 2001
From: Igor Scheller <igor.scheller@igorshp.de>
Date: Wed, 27 Nov 2019 23:43:21 +0100
Subject: Added Schedule parsing and replaced old Fahrplan importer

Resolves #553 (Change Frab Import from xCal to XML)
Resolves #538 (Feature Request: Multi Frab Import)
---
 src/Helpers/Schedule/XmlParser.php | 172 +++++++++++++++++++++++++++++++++++++
 1 file changed, 172 insertions(+)
 create mode 100644 src/Helpers/Schedule/XmlParser.php

(limited to 'src/Helpers/Schedule/XmlParser.php')

diff --git a/src/Helpers/Schedule/XmlParser.php b/src/Helpers/Schedule/XmlParser.php
new file mode 100644
index 00000000..1492aaca
--- /dev/null
+++ b/src/Helpers/Schedule/XmlParser.php
@@ -0,0 +1,172 @@
+<?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;
+    }
+}
-- 
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