Refactor

modules/opd_podcast/src/Guests.php

@@ -0,0 +1,62 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Drupal\opd_podcast;
+
+use Drupal\taxonomy\TermInterface;
+
+/**
+ * @implements \IteratorAggregate<Guest>
+ */
+final class Guests implements \ArrayAccess, \Countable, \IteratorAggregate, \Stringable {
+
+ /**
+  * @param Guest[] $guests
+  */
+  private function __construct(private array $guests) {
+  }
+
+  public function count(): int {
+    return count($this->guests);
+  }
+
+  public function getIterator(): \Traversable {
+    return new \ArrayIterator($this->guests);
+  }
+
+  public function offsetExists(mixed $offset): bool {
+    return isset($this->guests[$offset]);
+  }
+
+  public function offsetGet(mixed $offset): mixed {
+    return $this->guests[$offset];
+  }
+
+  public function offsetSet(mixed $offset, mixed $value): void {
+    $this->guests[$offset] = $value;
+  }
+
+  public function offsetUnset(mixed $offset): void {
+    unset($this->guests[$offset]);
+  }
+
+  public function __toString(): string {
+    // TODO: allow for more than two guests.
+    if (count($this->guests) === 2) {
+      assert($this->guests[1] instanceof Guest);
+
+      return sprintf('%s %s %s', $this->guests[0]->getName(), t('and'), $this->guests[1]->getName());
+    }
+
+    return strval($this->guests[0]->getName());
+  }
+
+  /**
+   * @param Guest[] $guests
+   */
+  public static function new(array $guests): self {
+    return new self($guests);
+  }
+
+}