first version

kirby/src/Toolkit/Silo.php

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+<?php
+
+namespace Kirby\Toolkit;
+
+/**
+ * The Silo class is a core class to handle
+ * setting, getting and removing static data of
+ * a singleton.
+ *
+ * @package   Kirby Toolkit
+ * @author    Bastian Allgeier <bastian@getkirby.com>
+ * @link      http://getkirby.com
+ * @copyright Bastian Allgeier
+ * @license   http://www.opensource.org/licenses/mit-license.php MIT License
+ */
+class Silo
+{
+
+    /**
+     * @var array
+     */
+    public static $data = [];
+
+    /**
+    * Setter for new data.
+    *
+    * @param string|array $key
+    * @param mixed $value
+    * @return array
+    */
+    public static function set($key, $value = null): array
+    {
+        if (is_array($key) === true) {
+            return static::$data = array_merge(static::$data, $key);
+        } else {
+            static::$data[$key] = $value;
+            return static::$data;
+        }
+    }
+
+    /**
+     * @param string|array $key
+     * @param mixed $default
+     * @return mixed
+     */
+    public static function get($key = null, $default = null)
+    {
+        if ($key === null) {
+            return static::$data;
+        }
+
+        return A::get(static::$data, $key, $default);
+    }
+
+    /**
+     * Removes an item from the data array
+     *
+     * @param string|null $key
+     * @return array
+     */
+    public static function remove(string $key = null): array
+    {
+        // reset the entire array
+        if ($key === true) {
+            return static::$data = [];
+        }
+
+        // unset a single key
+        unset(static::$data[$key]);
+
+        // return the array without the removed key
+        return static::$data;
+    }
+}