Create LazyComponent.php

Author: peldax

src/Infinityloop/LazyComponent/LazyComponent.php

@@ -0,0 +1,49 @@
+<?php
+
+declare(strict_types = 1);
+
+namespace Infinityloop\LazyComponent;
+
+abstract class LazyComponent extends \Nette\Application\UI\Control
+{
+    private bool $loaded = false;
+
+    public function handleLoadComponent() : void
+    {
+        $this->loaded = true;
+        $this->redrawControl();
+    }
+
+    public function renderLoadComponentLink() : void
+    {
+        echo $this->link('loadComponent');
+    }
+
+    public function render() : void
+    {
+        if (!$this->loaded) {
+            $this->template->setFile(__DIR__ . '/emptyComponent.latte');
+        } else {
+            $this->beforeRender();
+            $this->template->setFile(\str_replace('.php', '.latte', static::getReflection()->getFileName()));
+        }
+
+        $this->template->render();
+    }
+
+    public function saveState(array &$params): void
+    {
+        parent::saveState($params);
+        $params['lazyComponent_loaded'] = $this->loaded;
+    }
+
+    public function loadState(array $params): void
+    {
+        parent::saveState($params);
+        $this->loaded = (bool) ($params['lazyComponent_loaded'] ?? $this->loaded);
+    }
+
+    protected function beforeRender() : void
+    {
+    }
+}