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plugins/media-action/resize/src/Extension/Resize.php

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+<?php
+
+/**
+ * @package     Joomla.Plugin
+ * @subpackage  Media-Action.resize
+ *
+ * @copyright   (C) 2017 Open Source Matters, Inc. <https://www.joomla.org>
+ * @license     GNU General Public License version 2 or later; see LICENSE.txt
+ */
+
+namespace Joomla\Plugin\MediaAction\Resize\Extension;
+
+use Joomla\CMS\Image\Image;
+use Joomla\Component\Media\Administrator\Plugin\MediaActionPlugin;
+
+// phpcs:disable PSR1.Files.SideEffects
+\defined('_JEXEC') or die;
+// phpcs:enable PSR1.Files.SideEffects
+
+/**
+ * Media Manager Resize Action
+ *
+ * @since  4.0.0
+ */
+final class Resize extends MediaActionPlugin
+{
+    /**
+     * The save event.
+     *
+     * @param   string   $context  The context
+     * @param   object   $item     The item
+     * @param   boolean  $isNew    Is new item
+     * @param   array    $data     The validated data
+     *
+     * @return  void
+     *
+     * @since   4.0.0
+     */
+    public function onContentBeforeSave($context, $item, $isNew, $data = [])
+    {
+        if ($context != 'com_media.file') {
+            return;
+        }
+
+        if (!$this->params->get('batch_width') && !$this->params->get('batch_height')) {
+            return;
+        }
+
+        if (!\in_array($item->extension, ['jpg', 'jpeg', 'png', 'gif'])) {
+            return;
+        }
+
+        $imgObject = new Image(imagecreatefromstring($item->data));
+
+        if ($imgObject->getWidth() < $this->params->get('batch_width', 0) && $imgObject->getHeight() < $this->params->get('batch_height', 0)) {
+            return;
+        }
+
+        $imgObject->resize(
+            $this->params->get('batch_width', 0),
+            $this->params->get('batch_height', 0),
+            false,
+            Image::SCALE_INSIDE
+        );
+
+        $type = IMAGETYPE_JPEG;
+
+        switch ($item->extension) {
+            case 'gif':
+                $type = IMAGETYPE_GIF;
+                break;
+            case 'png':
+                $type = IMAGETYPE_PNG;
+        }
+
+        ob_start();
+        $imgObject->toFile(null, $type);
+        $item->data = ob_get_clean();
+    }
+}