Initial commit

public/kirby/src/Cms/Languages.php

@@ -0,0 +1,94 @@
+<?php
+
+namespace Kirby\Cms;
+
+use Kirby\Exception\DuplicateException;
+use Kirby\Filesystem\F;
+
+/**
+ * A collection of all defined site languages
+ *
+ * @package   Kirby Cms
+ * @author    Bastian Allgeier <bastian@getkirby.com>
+ * @link      https://getkirby.com
+ * @copyright Bastian Allgeier
+ * @license   https://getkirby.com/license
+ */
+class Languages extends Collection
+{
+	/**
+	 * All registered languages methods
+	 */
+	public static array $methods = [];
+
+	/**
+	 * Creates a new collection with the given language objects
+	 *
+	 * @param null $parent
+	 * @throws \Kirby\Exception\DuplicateException
+	 */
+	public function __construct(
+		array $objects = [],
+		$parent = null
+	) {
+		$defaults = array_filter(
+			$objects,
+			fn ($language) => $language->isDefault() === true
+		);
+
+		if (count($defaults) > 1) {
+			throw new DuplicateException('You cannot have multiple default languages. Please check your language config files.');
+		}
+
+		parent::__construct($objects, null);
+	}
+
+	/**
+	 * Returns all language codes as array
+	 */
+	public function codes(): array
+	{
+		return App::instance()->multilang() ? $this->keys() : ['default'];
+	}
+
+	/**
+	 * Creates a new language with the given props
+	 * @internal
+	 */
+	public function create(array $props): Language
+	{
+		return Language::create($props);
+	}
+
+	/**
+	 * Returns the default language
+	 */
+	public function default(): Language|null
+	{
+		return $this->findBy('isDefault', true) ?? $this->first();
+	}
+
+	/**
+	 * Convert all defined languages to a collection
+	 * @internal
+	 */
+	public static function load(): static
+	{
+		$languages = [];
+		$files     = glob(App::instance()->root('languages') . '/*.php');
+
+		foreach ($files as $file) {
+			$props = F::load($file, allowOutput: false);
+
+			if (is_array($props) === true) {
+				// inject the language code from the filename
+				// if it does not exist
+				$props['code'] ??= F::name($file);
+
+				$languages[] = new Language($props);
+			}
+		}
+
+		return new static($languages);
+	}
+}