first commit

system/Cache/FactoriesCache.php

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+<?php
+
+declare(strict_types=1);
+
+/**
+ * This file is part of CodeIgniter 4 framework.
+ *
+ * (c) CodeIgniter Foundation <admin@codeigniter.com>
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+namespace CodeIgniter\Cache;
+
+use CodeIgniter\Cache\FactoriesCache\FileVarExportHandler;
+use CodeIgniter\Config\Factories;
+
+final class FactoriesCache
+{
+    /**
+     * @var CacheInterface|FileVarExportHandler
+     */
+    private $cache;
+
+    /**
+     * @param CacheInterface|FileVarExportHandler|null $cache
+     */
+    public function __construct($cache = null)
+    {
+        $this->cache = $cache ?? new FileVarExportHandler();
+    }
+
+    public function save(string $component): void
+    {
+        if (! Factories::isUpdated($component)) {
+            return;
+        }
+
+        $data = Factories::getComponentInstances($component);
+
+        $this->cache->save($this->getCacheKey($component), $data, 3600 * 24);
+    }
+
+    private function getCacheKey(string $component): string
+    {
+        return 'FactoriesCache_' . $component;
+    }
+
+    public function load(string $component): bool
+    {
+        $key = $this->getCacheKey($component);
+
+        if (! $data = $this->cache->get($key)) {
+            return false;
+        }
+
+        Factories::setComponentInstances($component, $data);
+
+        return true;
+    }
+
+    public function delete(string $component): void
+    {
+        $this->cache->delete($this->getCacheKey($component));
+    }
+}