| 1 |
<?php |
| 2 |
namespace Upress\EzCache\FileOptimizer; |
| 3 |
|
| 4 |
use Upress\EzCache\BackgroundProcesses\ConvertWebpProcess; |
| 5 |
use wpdb; |
| 6 |
|
| 7 |
class WebpConverter extends BaseFileOptimizer { |
| 8 |
/** @var string $cache_dir */ |
| 9 |
protected $cache_dir; |
| 10 |
/** @var string $cache_file */ |
| 11 |
protected $cache_file; |
| 12 |
/** @var ConvertWebpProcess $webp_processor */ |
| 13 |
protected $webp_processor; |
| 14 |
/** @var wpdb $wpdb */ |
| 15 |
protected $wpdb; |
| 16 |
|
| 17 |
function __construct( $cache_dir, $cache_file, $webp_processor, $wpdb ) { |
| 18 |
$this->cache_dir = $cache_dir; |
| 19 |
$this->cache_file = $cache_file; |
| 20 |
$this->webp_processor = $webp_processor; |
| 21 |
$this->wpdb = $wpdb; |
| 22 |
} |
| 23 |
|
| 24 |
/** |
| 25 |
* Minifies CSS files |
| 26 |
* |
| 27 |
* @param string $html HTML content. |
| 28 |
* |
| 29 |
* @return string |
| 30 |
*/ |
| 31 |
public function optimize( $html ) { |
| 32 |
/* |
| 33 |
* we need to make sure to handle multiple formats |
| 34 |
* <img src="elva-fairy-800w.jpg" alt="Elva dressed as a fairy"> |
| 35 |
* <img srcset="elva-fairy-320w.jpg 320w, elva-fairy-480w.jpg 480w, elva-fairy-800w.jpg 800w" sizes="(max-width: 320px) 280px, (max-width: 480px) 440px, 800px" src="elva-fairy-800w.jpg" alt="Elva dressed as a fairy"> |
| 36 |
* <picture><source media="(max-width: 799px)" srcset="elva-480w-close-portrait.jpg"><img srv="elva-480w-close-portrait.jpg" alt="Elva dressed as a fairy"></picture> |
| 37 |
* <div style="background: url(elva-480w-close-portrait.jpg);"> |
| 38 |
* <div style="background-image: url(elva-480w-close-portrait.jpg);"> |
| 39 |
*/ |
| 40 |
$images = $this->find( '<img\s+([^>]+[\s"\'])?src\s*=\s*[\'"]\s*?([^\'"]+(?:\?[^\'"]*)?)\s*?[\'"]([^>]+)?\/?>', $html ); |
| 41 |
|
| 42 |
if ( ! $images ) { |
| 43 |
return $html; |
| 44 |
} |
| 45 |
|
| 46 |
$need_to_process = false; |
| 47 |
foreach ( $images as $image ) { |
| 48 |
$image_url = $image[2]; |
| 49 |
|
| 50 |
// we don't process external files or files that don't exist |
| 51 |
|
| 52 |
if($this->is_external_file( $image_url )) { |
| 53 |
continue; |
| 54 |
} |
| 55 |
|
| 56 |
$image_path = $this->get_file_path( $image[2] ); |
| 57 |
if( ! file_exists( $image_path ) ) { |
| 58 |
continue; |
| 59 |
} |
| 60 |
|
| 61 |
$ext = pathinfo( $image_path, PATHINFO_EXTENSION ); |
| 62 |
$mime = mime_content_type( $image_path ); |
| 63 |
|
| 64 |
|
| 65 |
|
| 66 |
$ext_quoted = preg_quote( $ext, '/' ); |
| 67 |
$image_webp_url = preg_replace( '/^(.+\.)'.$ext_quoted.'(\?.+)?$/u', '$1' . substr( md5( $ext ), -6 ) . '.webp$2', $image_url ); |
| 68 |
$image_webp_path = preg_replace( '/^(.+\.)'.$ext_quoted.'$/u', '$1' . substr( md5( $ext ), -6 ) . '.webp', $image_path ); |
| 69 |
|
| 70 |
// and skip non-images or images already in webp format |
| 71 |
if ( 'webp' == $ext || ! preg_match( '/image\/.+/i', $mime ) || preg_match( '/image\/(svg.*|ico|gif|webp)/i', $mime ) ) { |
| 72 |
continue; |
| 73 |
} |
| 74 |
|
| 75 |
// check if the image has a webp version and if it has then just replace it in the html |
| 76 |
$image = $this->wpdb->get_row( |
| 77 |
$this->wpdb->prepare( |
| 78 |
"SELECT * FROM `{$this->wpdb->prefix}ezcache_webp_images` WHERE `uid` = %s LIMIT 1", |
| 79 |
[ sha1( $image_path ) ] |
| 80 |
) |
| 81 |
); |
| 82 |
|
| 83 |
if ( $image && 'completed' == $image->status ) { |
| 84 |
$html = preg_replace( '/\b' . preg_quote( $image_url, '/' ) . '\b/u', $image->webp_url, $html ); |
| 85 |
continue; |
| 86 |
} |
| 87 |
|
| 88 |
if ( $image && 'pending' == $image->status ) { |
| 89 |
// image is being processed in background |
| 90 |
continue; |
| 91 |
} |
| 92 |
|
| 93 |
if ( $image && 'failed' == $image->status ) { |
| 94 |
// if the image has failed we need to requeue it |
| 95 |
$this->wpdb->query( |
| 96 |
$this->wpdb->prepare( |
| 97 |
"DELETE FROM `{$this->wpdb->prefix}ezcache_webp_images` WHERE `id` = %d", |
| 98 |
[ $image->id ] |
| 99 |
) |
| 100 |
); |
| 101 |
} |
| 102 |
|
| 103 |
// otherwise send the image to process |
| 104 |
// this should parse the images and set a callback to update the cache file |
| 105 |
$this->wpdb->query( |
| 106 |
$this->wpdb->prepare( |
| 107 |
"INSERT INTO `{$this->wpdb->prefix}ezcache_webp_images` (`uid`, `url`, `webp_url`, `path`, `webp_path`, `status`, `created_at`, `updated_at`) VALUES (%s, %s, %s, %s, %s, %s, %s, %s)", |
| 108 |
[ sha1( $image_path ), $image_url, $image_webp_url, $image_path, $image_webp_path, 'pending', date( 'Y-m-d H:i:s' ), date( 'Y-m-d H:i:s' ) ] |
| 109 |
) |
| 110 |
); |
| 111 |
|
| 112 |
if ( empty( $this->wpdb->last_error ) ) { |
| 113 |
$need_to_process = true; |
| 114 |
$this->webp_processor->push_to_queue( [ |
| 115 |
'row_id' => $this->wpdb->insert_id, |
| 116 |
'image_url' => $image_url, |
| 117 |
'image_path' => $image_path, |
| 118 |
'image_webp_url' => $image_webp_url, |
| 119 |
'image_webp_path' => $image_webp_path, |
| 120 |
'cache_file' => $this->cache_file, |
| 121 |
] ); |
| 122 |
} else { |
| 123 |
error_log( 'ezCache WebP Converter Error: ' . $this->wpdb->last_error ); |
| 124 |
} |
| 125 |
} |
| 126 |
|
| 127 |
if ( $need_to_process ) { |
| 128 |
add_filter( 'http_headers_useragent', function () { |
| 129 |
return 'webp background processor'; |
| 130 |
}, 9999 ); |
| 131 |
$this->webp_processor->save(); |
| 132 |
} |
| 133 |
|
| 134 |
return $html; |
| 135 |
} |
| 136 |
} |
| 137 |
|
