tahmidbintaslim · March 29, 2023 03:48 · Sep 5, 2018
diff --git a/converter.php b/converter.php
@@ -0,0 +1,119 @@
+<?php
+
+namespace Converter;
+
+use WebPConvert\WebPConvert;
+
+class Converter
+{
+    public $lazy = false;
+    public function __construct($lazy = false)
+    {
+        $this->lazy = $lazy;
+
+        add_filter('wp_generate_attachment_metadata', function ($meta) {
+
+            $path = wp_upload_dir(); // get upload directory
+            $file = $path['basedir'].'/'.$meta['file']; // Get full size image
+
+            $files[] = $file; // Set up an array of image size urls
+
+            foreach ($meta['sizes'] as $size) {
+                $files[] = $path['path'].'/'.$size['file'];
+            }
+
+            foreach ($files as $file) { // iterate through each image size
+                list($orig_w, $orig_h, $orig_type) = @getimagesize($file);
+                $image = wp_load_image($file);
+
+                switch ($orig_type) {
+                    case IMAGETYPE_PNG:
+                    case IMAGETYPE_JPEG:
+                          $success = WebPConvert::convert($file, $file.'.webp', array(
+                            'quality' => 90,
+                            // more options available!
+                            ));
+                        break;
+                }
+            }
+            return $meta;
+        });
+
+        add_action('delete_attachment', function ($id) {
+            if (wp_attachment_is_image($id)) {
+                $path = wp_upload_dir(); // get upload directory
+                $images  = $this->getImages($id);
+                foreach ($images as $i) {
+                    // Need to check if webp version exists, unable to convert all files only PNG and JPG
+                    if (file_exists(ABSPATH . '..' . wp_make_link_relative($i).'.webp')) {
+                        unlink(ABSPATH . '..' . wp_make_link_relative($i).'.webp');
+                    }
+                }
+            }
+        });
+
+        add_filter('post_thumbnail_html', function ($html, $post_id, $post_thumbnail_id, $size, $attr) {
+            $id = get_post_thumbnail_id(); // gets the id of the current post_thumbnail (in the loop)
+            $src = wp_get_attachment_image_src($id, $size); // gets the image url specific to the $size param
+            $alt = get_the_title($id); // gets the post thumbnail title
+            $class = $attr['class']; // gets classes passed to the post thumbnail
+            if (empty($src)) {
+                $src = wp_get_attachment_image_src($id, 'full'); // gets the image url specific to the $size param
+            }
+
+            $html = "<picture class=\"$class\">";
+            if (file_exists(ABSPATH . '..' . wp_make_link_relative($src[0]).'.webp')) {
+                $html .= "<source srcset=\"{$src[0]}.webp\" type=\"image/webp\">";
+            }
+            $html .= "<source srcset=\"{$src[0]}\" type=\"image/jpeg\">";
+            $html .= "<img src=\"{$src[0]}\" alt=\"$alt\">";
+            $html .= "</picture>";
+
+            if (empty($src)) {
+                $html = '';
+            }
+            return $html;
+        }, 99, 5);
+
+
+        add_filter( 'image_send_to_editor', function ($html, $id, $caption, $title, $align, $url, $size, $alt ) {
+            $src = wp_get_attachment_image_src($id, $size); // gets the image url specific to the $size param
+            $class = $align; // gets classes passed to the post thumbnail
+            if (empty($src)) {
+                $src = wp_get_attachment_image_src($id, 'full'); // gets the image url specific to the $size param
+            }
+
+            $html = "<picture class=\"$class\">";
+            if (file_exists(ABSPATH . '..' . wp_make_link_relative($src[0]).'.webp')) {
+                $html .= "<source srcset=\"{$src[0]}.webp\" type=\"image/webp\">";
+            }
+            $html .= "<source srcset=\"{$src[0]}\" type=\"image/jpeg\">";
+            $html .= "<img src=\"{$src[0]}\" alt=\"$alt\">";
+            $html .= "</picture>";
+
+            if (empty($src)) {
+                $html = '';
+            }
+            return $html;
+        }, 99, 10 );
+
+    }
+    public function getImages($id)
+    {
+        if (!wp_attachment_is_image($id)) {
+            return;
+        }
+
+        $links = array();
+        $sizes = get_intermediate_image_sizes();
+        $sizes[] = 'full';
+        foreach ($sizes as $size) {
+            $image = wp_get_attachment_image_src(get_the_ID(), $size);
+            if (!empty($image) && ( true == $image[3] || 'full' == $size )) {
+                $links[] = $image[0];
+            }
+        }
+
+        return $links;
+    }
+}
diff --git a/functions.php b/functions.php
@@ -0,0 +1,5 @@
+<?php
+
+use Converter\Converter;
+
+$converter = new Converter();
diff --git a/readme.md b/readme.md
@@ -0,0 +1,3 @@
+Save the `converter.php` file to a publicly accessible directory. Require this file in your functions along with adding the two lines of code in `functions.php`
+
+Only requirement is `rosell-dk/webp-convert`, install by running `composer require rosell-dk/webp-convert` and requiring `autoload.php` somewhere in your installaton - you don't need to worry about requiring `autoload.php` if using Bedrock
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1,3 @@
		Save the `converter.php` file to a publicly accessible directory. Require this file in your functions along with adding the two lines of code in `functions.php`

		Only requirement is `rosell-dk/webp-convert`, install by running `composer require rosell-dk/webp-convert` and requiring `autoload.php` somewhere in your installaton - you don't need to worry about requiring `autoload.php` if using Bedrock