Move src and tests directories

src/Talk/TwigExtension/TalksExtension.php

@@ -0,0 +1,119 @@
+<?php
+
+namespace App\Talk\TwigExtension;
+
+use Sculpin\Contrib\ProxySourceCollection\ProxySourceCollection;
+use Tightenco\Collect\Support\Collection;
+use Twig\Extension\AbstractExtension;
+use Twig\TwigFilter;
+use Twig\TwigFunction;
+
+class TalksExtension extends AbstractExtension
+{
+    /**
+     * @var int The current date.
+     */
+    private $today;
+
+    public function __construct()
+    {
+        $this->today = (new \DateTime())
+            ->modify('today')
+            ->setTimezone(new \DateTimeZone('Europe/London'))
+            ->getTimestamp();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getFunctions()
+    {
+        return [
+            new TwigFunction('get_all_talks', [$this, 'getAllTalks']),
+            new TwigFunction('get_upcoming_talks', [$this, 'getUpcomingTalks']),
+            new TwigFunction('get_past_talks', [$this, 'getPastTalks']),
+            new TwigFunction('get_past_talk_count', [$this, 'getPastTalkCount']),
+            new TwigFunction('get_events_for_talk', [$this, 'getEventsForTalk']),
+        ];
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getName()
+    {
+        return 'app.talks';
+    }
+
+    /**
+     * Get all upcoming and previous talks.
+     *
+     * @param ProxySourceCollection|array $talks All talk nodes.
+     *
+     * @return Collection A sorted collection of talks.
+     */
+    public function getAllTalks($talks): Collection
+    {
+        return (new Collection($talks))->sortBy(function ($talk) {
+            return $this->getLastDate($talk);
+        });
+    }
+
+    public function getUpcomingTalks(array $talks): Collection
+    {
+        return $this->getAllTalks($talks)->filter(function ($talk): bool {
+            return $this->getLastDate($talk) >= $this->today;
+        })->values();
+    }
+
+    public function getPastTalks(array $talks): Collection
+    {
+        return $this->getAllTalks($talks)->filter(function ($talk): bool {
+            return $this->getLastDate($talk) < $this->today;
+        })->values();
+    }
+
+    public function getAllEvents($talks): Collection
+    {
+        return $this->eventsFromTalks($talks);
+    }
+
+    public function getPastEvents($talks): Collection
+    {
+        return $this->eventsFromTalks($talks)->filter(function ($event): bool {
+            return $event['date'] < $this->today;
+        })->sortBy('date');
+    }
+
+    public function getPastTalkCount($talks): int
+    {
+        return $this->getPastEvents($talks)->count();
+    }
+
+    public function getEventsForTalk(array $talk, array $eventData): Collection
+    {
+        return (new Collection($talk['events']))
+            ->map(function (array $event) use ($eventData): Collection {
+                return (new Collection($eventData[$event['event']]))->merge($event);
+            })
+            ->filter(function (Collection $event): bool {
+                return !empty($event->get('date'));
+            })
+            ->sortBy('date');
+    }
+
+    private function getLastDate($talk): string
+    {
+        return $this->eventsFromTalks(new Collection([$talk]))
+            ->pluck('date')->max();
+    }
+
+    private function eventsFromTalks($talks): Collection
+    {
+        return (new Collection($talks))->flatMap(function ($talk): array {
+            return $talk['events'];
+        })->filter(function ($event): bool {
+            return !empty($event['date']);
+        });
+    }
+}