| 1 |
<?php |
| 2 |
|
| 3 |
/** |
| 4 |
* The class handles the image replacements and optimizations. |
| 5 |
* |
| 6 |
* @package \Optml\Inc |
| 7 |
* @author Optimole <friends@optimole.com> |
| 8 |
*/ |
| 9 |
class Optml_Replacer { |
| 10 |
/** |
| 11 |
* Cached object instance. |
| 12 |
* |
| 13 |
* @var Optml_Replacer |
| 14 |
*/ |
| 15 |
protected static $instance = null; |
| 16 |
|
| 17 |
/** |
| 18 |
* A list of allowd extensions. |
| 19 |
* |
| 20 |
* @var array |
| 21 |
*/ |
| 22 |
protected static $extensions = array( |
| 23 |
'jpg|jpeg|jpe' => 'image/jpeg', |
| 24 |
'png' => 'image/png', |
| 25 |
'webp' => 'image/webp', |
| 26 |
'svg' => 'image/svg+xml', |
| 27 |
); |
| 28 |
|
| 29 |
/** |
| 30 |
* Holds an array of image sizes. |
| 31 |
* |
| 32 |
* @var array |
| 33 |
*/ |
| 34 |
protected static $image_sizes; |
| 35 |
|
| 36 |
/** |
| 37 |
* Te cdn url, it will be build on the run. |
| 38 |
* |
| 39 |
* @var null |
| 40 |
*/ |
| 41 |
protected $cdn_url = null; |
| 42 |
|
| 43 |
/** |
| 44 |
* A secret key to encode payload. |
| 45 |
* |
| 46 |
* @var null |
| 47 |
*/ |
| 48 |
protected $cdn_secret = null; |
| 49 |
|
| 50 |
/** |
| 51 |
* Defines which is the maximum width accepted in the optimization process. |
| 52 |
* |
| 53 |
* @var int |
| 54 |
*/ |
| 55 |
protected $max_width = 3000; |
| 56 |
|
| 57 |
/** |
| 58 |
* Defines the quality parameter. |
| 59 |
* |
| 60 |
* @var int |
| 61 |
*/ |
| 62 |
protected $quality = 'auto'; |
| 63 |
|
| 64 |
/** |
| 65 |
* Defines which is the maximum width accepted in the optimization process. |
| 66 |
* |
| 67 |
* @var int |
| 68 |
*/ |
| 69 |
protected $max_height = 3000; |
| 70 |
|
| 71 |
/** |
| 72 |
* Holds the real images sizes as an array. |
| 73 |
* |
| 74 |
* @var null |
| 75 |
*/ |
| 76 |
protected $img_real_sizes = null; |
| 77 |
|
| 78 |
/** |
| 79 |
* A cached version of `wp_upload_dir` |
| 80 |
* |
| 81 |
* @var null |
| 82 |
*/ |
| 83 |
protected $upload_dir = null; |
| 84 |
/** |
| 85 |
* Setings handler. |
| 86 |
* |
| 87 |
* @var Optml_Settings $settings |
| 88 |
*/ |
| 89 |
protected $settings = null; |
| 90 |
|
| 91 |
/** |
| 92 |
* Class instance method. |
| 93 |
* |
| 94 |
* @static |
| 95 |
* @since 1.0.0 |
| 96 |
* @access public |
| 97 |
* @return Optml_Replacer |
| 98 |
*/ |
| 99 |
public static function instance() { |
| 100 |
if ( is_null( self::$instance ) ) { |
| 101 |
self::$instance = new self(); |
| 102 |
self::$instance->init(); |
| 103 |
} |
| 104 |
|
| 105 |
return self::$instance; |
| 106 |
} |
| 107 |
|
| 108 |
/** |
| 109 |
* The initialize method. |
| 110 |
*/ |
| 111 |
function init() { |
| 112 |
|
| 113 |
add_filter( 'optml_replace_image', array( $this, 'get_imgcdn_url' ), 10, 2 ); |
| 114 |
|
| 115 |
$this->settings = new Optml_Settings(); |
| 116 |
|
| 117 |
$this->set_properties(); |
| 118 |
|
| 119 |
if ( ! $this->should_replace() ) { |
| 120 |
return; |
| 121 |
} |
| 122 |
|
| 123 |
if ( empty( $this->cdn_url ) ) { |
| 124 |
return; |
| 125 |
} |
| 126 |
add_filter( 'image_downsize', array( $this, 'filter_image_downsize' ), PHP_INT_MAX, 3 ); |
| 127 |
add_filter( 'the_content', array( $this, 'filter_the_content' ), PHP_INT_MAX ); |
| 128 |
add_filter( 'wp_calculate_image_srcset', array( $this, 'filter_srcset_attr' ), PHP_INT_MAX, 5 ); |
| 129 |
add_filter( 'init', array( $this, 'filter_options_and_mods' ) ); |
| 130 |
add_action( 'template_redirect', array( $this, 'init_html_replacer' ), PHP_INT_MAX ); |
| 131 |
add_action( 'get_post_metadata', array( $this, 'replace_meta' ), PHP_INT_MAX, 4 ); |
| 132 |
} |
| 133 |
|
| 134 |
/** |
| 135 |
* Set the cdn url based on the current connected user. |
| 136 |
*/ |
| 137 |
protected function set_properties() { |
| 138 |
$this->upload_dir = wp_upload_dir(); |
| 139 |
$this->upload_dir = $this->upload_dir['baseurl']; |
| 140 |
|
| 141 |
$service_data = $this->settings->get( 'service_data' ); |
| 142 |
if ( ! isset( $service_data['cdn_key'] ) ) { |
| 143 |
return; |
| 144 |
} |
| 145 |
$cdn_key = $service_data ['cdn_key']; |
| 146 |
$cdn_secret = $service_data['cdn_secret']; |
| 147 |
$this->quality = $this->settings->get( 'quality' ); |
| 148 |
if ( empty( $cdn_key ) || empty( $cdn_secret ) ) { |
| 149 |
return; |
| 150 |
} |
| 151 |
$this->cdn_secret = $cdn_secret; |
| 152 |
$this->cdn_url = sprintf( |
| 153 |
'https://%s.%s', |
| 154 |
strtolower( $cdn_key ), |
| 155 |
'i.optimole.com' |
| 156 |
); |
| 157 |
} |
| 158 |
|
| 159 |
/** |
| 160 |
* Check if we should rewrite the urls. |
| 161 |
* |
| 162 |
* @return bool If we can replace the image. |
| 163 |
* |
| 164 |
*/ |
| 165 |
public function should_replace() { |
| 166 |
|
| 167 |
if ( is_admin() ) { |
| 168 |
|
| 169 |
return false; |
| 170 |
} |
| 171 |
|
| 172 |
if ( ! $this->settings->is_connected() ) { |
| 173 |
return false; |
| 174 |
} |
| 175 |
if ( ! $this->settings->is_enabled() ) { |
| 176 |
|
| 177 |
return false; |
| 178 |
} |
| 179 |
if ( array_key_exists( 'preview', $_GET ) && 'true' == $_GET['preview'] ) { |
| 180 |
return false; |
| 181 |
} |
| 182 |
|
| 183 |
return true; |
| 184 |
} |
| 185 |
|
| 186 |
/** |
| 187 |
* Init html replacer handler. |
| 188 |
*/ |
| 189 |
public function init_html_replacer() { |
| 190 |
if ( is_admin() ) { |
| 191 |
return; |
| 192 |
} |
| 193 |
ob_start( |
| 194 |
array( &$this, 'replace_urls' ) |
| 195 |
); |
| 196 |
} |
| 197 |
|
| 198 |
/** |
| 199 |
* This filter will replace all the images retrieved via "wp_get_image" type of functions. |
| 200 |
* |
| 201 |
* @param array $image The filtered value. |
| 202 |
* @param int $attachment_id The related attachment id. |
| 203 |
* @param array|string $size This could be the name of the thumbnail size or an array of custom dimensions. |
| 204 |
* |
| 205 |
* @return array |
| 206 |
*/ |
| 207 |
public function filter_image_downsize( $image, $attachment_id, $size ) { |
| 208 |
// we don't run optimizations on dashboard side |
| 209 |
if ( is_admin() ) { |
| 210 |
return $image; |
| 211 |
} |
| 212 |
|
| 213 |
$image_url = wp_get_attachment_url( $attachment_id ); |
| 214 |
|
| 215 |
if ( $image_url ) { |
| 216 |
// $image_meta = image_get_intermediate_size( $attachment_id, $size ); |
| 217 |
$image_meta = wp_get_attachment_metadata( $attachment_id ); |
| 218 |
$image_args = self::image_sizes(); |
| 219 |
|
| 220 |
// default size |
| 221 |
$sizes = array( |
| 222 |
'width' => isset( $image_meta['width'] ) ? intval( $image_meta['width'] ) : 'auto', |
| 223 |
'height' => isset( $image_meta['height'] ) ? intval( $image_meta['height'] ) : 'auto', |
| 224 |
); |
| 225 |
// in case there is a custom image size $size will be an array. |
| 226 |
if ( is_array( $size ) ) { |
| 227 |
$sizes = array( |
| 228 |
'width' => ( $size[0] < $sizes['width'] ? $size[0] : $sizes['width'] ), |
| 229 |
'height' => ( $size[1] < $sizes['height'] ? $size[0] : $sizes['height'] ), |
| 230 |
); |
| 231 |
} elseif ( 'full' !== $size && isset( $image_args[ $size ] ) ) { // overwrite if there a size |
| 232 |
$sizes = array( |
| 233 |
'width' => $image_args[ $size ]['width'] < $sizes['width'] ? $image_args[ $size ]['width'] : $sizes['width'], |
| 234 |
'height' => $image_args[ $size ]['height'] < $sizes['height'] ? $image_args[ $size ]['height'] : $sizes['height'], |
| 235 |
); |
| 236 |
} |
| 237 |
|
| 238 |
$new_sizes = $this->validate_image_sizes( $sizes['width'], $sizes['height'] ); |
| 239 |
|
| 240 |
// resized thumbnails will have their own filenames. we should get those instead of the full image one |
| 241 |
if ( is_string( $size ) && ! empty( $image_meta['sizes'] ) && ! empty( $image_meta['sizes'][ $size ] ) ) { |
| 242 |
$image_url = str_replace( basename( $image_url ), $image_meta['sizes'][ $size ]['file'], $image_url ); |
| 243 |
} |
| 244 |
|
| 245 |
// try to get an optimized image url. |
| 246 |
$new_url = $this->get_imgcdn_url( $image_url, $new_sizes ); |
| 247 |
if ( $new_url === $image_url ) { |
| 248 |
return $image; |
| 249 |
} |
| 250 |
$return = array( |
| 251 |
$new_url, |
| 252 |
$sizes['width'], |
| 253 |
$sizes['height'], |
| 254 |
false, |
| 255 |
); |
| 256 |
|
| 257 |
return $return; |
| 258 |
} |
| 259 |
|
| 260 |
// in case something wrong comes, well return the default. |
| 261 |
return $image; |
| 262 |
} |
| 263 |
|
| 264 |
/** |
| 265 |
* Returns the array of image sizes since `get_intermediate_image_sizes` and image metadata doesn't include the |
| 266 |
* custom image sizes in a reliable way. |
| 267 |
* |
| 268 |
* Inspired from jetpack/photon. |
| 269 |
* |
| 270 |
* @global $wp_additional_image_sizes |
| 271 |
* |
| 272 |
* @return array |
| 273 |
*/ |
| 274 |
protected static function image_sizes() { |
| 275 |
if ( null == self::$image_sizes ) { |
| 276 |
global $_wp_additional_image_sizes; |
| 277 |
|
| 278 |
// Populate an array matching the data structure of $_wp_additional_image_sizes so we have a consistent structure for image sizes |
| 279 |
$images = array( |
| 280 |
'thumb' => array( |
| 281 |
'width' => intval( get_option( 'thumbnail_size_w' ) ), |
| 282 |
'height' => intval( get_option( 'thumbnail_size_h' ) ), |
| 283 |
'crop' => (bool) get_option( 'thumbnail_crop' ), |
| 284 |
), |
| 285 |
'medium' => array( |
| 286 |
'width' => intval( get_option( 'medium_size_w' ) ), |
| 287 |
'height' => intval( get_option( 'medium_size_h' ) ), |
| 288 |
'crop' => false, |
| 289 |
), |
| 290 |
'large' => array( |
| 291 |
'width' => intval( get_option( 'large_size_w' ) ), |
| 292 |
'height' => intval( get_option( 'large_size_h' ) ), |
| 293 |
'crop' => false, |
| 294 |
), |
| 295 |
'full' => array( |
| 296 |
'width' => null, |
| 297 |
'height' => null, |
| 298 |
'crop' => false, |
| 299 |
), |
| 300 |
); |
| 301 |
|
| 302 |
// Compatibility mapping as found in wp-includes/media.php |
| 303 |
$images['thumbnail'] = $images['thumb']; |
| 304 |
|
| 305 |
// Update class variable, merging in $_wp_additional_image_sizes if any are set |
| 306 |
if ( is_array( $_wp_additional_image_sizes ) && ! empty( $_wp_additional_image_sizes ) ) { |
| 307 |
self::$image_sizes = array_merge( $images, $_wp_additional_image_sizes ); |
| 308 |
} else { |
| 309 |
self::$image_sizes = $images; |
| 310 |
} |
| 311 |
} |
| 312 |
|
| 313 |
return is_array( self::$image_sizes ) ? self::$image_sizes : array(); |
| 314 |
} |
| 315 |
|
| 316 |
/** |
| 317 |
* Keep the image sizes under a sane limit. |
| 318 |
* |
| 319 |
* @param string $width The width value which should be sanitized. |
| 320 |
* @param string $height The height value which should be sanitized. |
| 321 |
* |
| 322 |
* @return array |
| 323 |
*/ |
| 324 |
protected function validate_image_sizes( $width, $height ) { |
| 325 |
global $content_width; |
| 326 |
/** |
| 327 |
* While we are inside a content filter we need to keep our max_width under the content_width global |
| 328 |
* There is no reason the have a image wider than the content width. |
| 329 |
*/ |
| 330 |
if ( |
| 331 |
doing_filter( 'the_content' ) |
| 332 |
&& isset( $GLOBALS['content_width'] ) |
| 333 |
&& apply_filters( 'optml_imgcdn_allow_resize_images_from_content_width', false ) |
| 334 |
) { |
| 335 |
$content_width = (int) $GLOBALS['content_width']; |
| 336 |
|
| 337 |
if ( $this->max_width > $content_width ) { |
| 338 |
$this->max_width = $content_width; |
| 339 |
} |
| 340 |
} |
| 341 |
|
| 342 |
$percentWidth = $percentHeight = null; |
| 343 |
|
| 344 |
if ( $width > $this->max_width ) { |
| 345 |
// we need to remember how much in percentage the width was resized and apply the same treatment to the height. |
| 346 |
$percentWidth = ( 1 - $this->max_width / $width ) * 100; |
| 347 |
$width = $this->max_width; |
| 348 |
$height = round( $height * ( ( 100 - $percentWidth ) / 100 ), 0 ); |
| 349 |
} |
| 350 |
|
| 351 |
// now for the height |
| 352 |
if ( $height > $this->max_height ) { |
| 353 |
$percentHeight = ( 1 - $this->max_height / $height ) * 100; |
| 354 |
// if we reduce the height to max_height by $x percentage than we'll also reduce the width for the same amount. |
| 355 |
$height = $this->max_height; |
| 356 |
$width = round( $width * ( ( 100 - $percentHeight ) / 100 ), 0 ); |
| 357 |
} |
| 358 |
|
| 359 |
return array( |
| 360 |
'width' => $width, |
| 361 |
'height' => $height, |
| 362 |
); |
| 363 |
} |
| 364 |
|
| 365 |
/** |
| 366 |
* Returns a signed image url authorized to be used in our CDN. |
| 367 |
* |
| 368 |
* @param string $url The url which should be signed. |
| 369 |
* @param array $args Dimension params; Supports `width` and `height`. |
| 370 |
* |
| 371 |
* @return string |
| 372 |
*/ |
| 373 |
public function get_imgcdn_url( $url, $args = array( 'width' => 'auto', 'height' => 'auto' ) ) { |
| 374 |
if ( apply_filters( 'optml_dont_replace_url', false, $url ) ) { |
| 375 |
return $url; |
| 376 |
} |
| 377 |
if ( ! $this->check_mimetype( $url ) ) { |
| 378 |
|
| 379 |
return $url; |
| 380 |
} |
| 381 |
// not used yet. |
| 382 |
$compress_level = apply_filters( 'optml_image_quality', $this->quality ); |
| 383 |
if ( isset( $args['quality'] ) || ! empty( $args['quality'] ) ) { |
| 384 |
$compress_level = $args['quality']; |
| 385 |
} |
| 386 |
$compress_level = $this->normalize_quality( $compress_level ); |
| 387 |
// this will authorize the image |
| 388 |
$url_parts = explode( '://', $url ); |
| 389 |
$scheme = $url_parts[0]; |
| 390 |
$path = $url_parts[1]; |
| 391 |
if ( $args['width'] !== 'auto' ) { |
| 392 |
$args['width'] = round( $args['width'], 0 ); |
| 393 |
} |
| 394 |
if ( $args['height'] !== 'auto' ) { |
| 395 |
$args['height'] = round( $args['height'], 0 ); |
| 396 |
} |
| 397 |
$payload = array( |
| 398 |
'path' => $this->urlception_encode( $path ), |
| 399 |
'scheme' => $scheme, |
| 400 |
'width' => (string) $args['width'], |
| 401 |
'height' => (string) $args['height'], |
| 402 |
'quality' => (string) $compress_level, |
| 403 |
); |
| 404 |
ksort( $payload ); |
| 405 |
|
| 406 |
$values = array_values( $payload ); |
| 407 |
$payload = implode( '', $values ); |
| 408 |
$hash = hash_hmac( 'md5', $payload, $this->cdn_secret ); |
| 409 |
|
| 410 |
$new_url = sprintf( |
| 411 |
'%s/%s/%s/%s/%s/%s/%s', |
| 412 |
$this->cdn_url, |
| 413 |
$hash, |
| 414 |
(string) $args['width'], |
| 415 |
(string) $args['height'], |
| 416 |
(string) $compress_level, |
| 417 |
$scheme, |
| 418 |
$path |
| 419 |
); |
| 420 |
|
| 421 |
return $new_url; |
| 422 |
} |
| 423 |
|
| 424 |
/** |
| 425 |
* Check url mimetype. |
| 426 |
* |
| 427 |
* @param string $url Url to check. |
| 428 |
* |
| 429 |
* @return bool Is a valid image url or not. |
| 430 |
*/ |
| 431 |
private function check_mimetype( $url ) { |
| 432 |
|
| 433 |
$mimes = self::$extensions; |
| 434 |
$type = wp_check_filetype( $url, $mimes ); |
| 435 |
|
| 436 |
if ( ! isset( $type['ext'] ) || empty( $type['ext'] ) ) { |
| 437 |
return false; |
| 438 |
} |
| 439 |
|
| 440 |
return true; |
| 441 |
} |
| 442 |
|
| 443 |
/** |
| 444 |
* Sanitize quality. |
| 445 |
* |
| 446 |
* @param string|int $quality Normalize quality |
| 447 |
* |
| 448 |
* @return int Numeric quality. |
| 449 |
*/ |
| 450 |
private function normalize_quality( $quality ) { |
| 451 |
|
| 452 |
if ( is_numeric( $quality ) ) { |
| 453 |
return intval( $quality ); |
| 454 |
} |
| 455 |
$quality = trim( $quality ); |
| 456 |
if ( $quality === 'auto' ) { |
| 457 |
return 'auto'; |
| 458 |
} |
| 459 |
if ( $quality === 'high' ) { |
| 460 |
return 90; |
| 461 |
} |
| 462 |
if ( $quality === 'medium' ) { |
| 463 |
return 60; |
| 464 |
} |
| 465 |
if ( $quality === 'low' ) { |
| 466 |
return 30; |
| 467 |
} |
| 468 |
|
| 469 |
return 60; |
| 470 |
} |
| 471 |
|
| 472 |
/** |
| 473 |
* Ensures that an url parameter can stand inside an url. |
| 474 |
* |
| 475 |
* @param string $url The required url. |
| 476 |
* |
| 477 |
* @return string |
| 478 |
*/ |
| 479 |
protected function urlception_encode( $url ) { |
| 480 |
$new_url = rtrim( $url, '/' ); |
| 481 |
|
| 482 |
return urlencode( $new_url ); |
| 483 |
} |
| 484 |
|
| 485 |
/** |
| 486 |
* Identify images in post content. |
| 487 |
* |
| 488 |
* @param string $content The post content which will be filtered. |
| 489 |
* |
| 490 |
* @return string |
| 491 |
*/ |
| 492 |
public function filter_the_content( $content ) { |
| 493 |
$images = self::parse_images_from_html( $content ); |
| 494 |
|
| 495 |
if ( empty( $images ) ) { |
| 496 |
return $content; // simple. no images |
| 497 |
} |
| 498 |
|
| 499 |
$image_sizes = self::image_sizes(); |
| 500 |
foreach ( $images[0] as $index => $tag ) { |
| 501 |
$width = $height = false; |
| 502 |
$new_tag = $tag; |
| 503 |
$src = $images['img_url'][ $index ]; |
| 504 |
|
| 505 |
if ( apply_filters( 'optml_imgcdn_disable_optimization_for_link', false, $src ) ) { |
| 506 |
continue; |
| 507 |
} |
| 508 |
|
| 509 |
if ( false !== strpos( $src, 'i.optimole.com' ) ) { |
| 510 |
continue; // we already have this |
| 511 |
} |
| 512 |
|
| 513 |
// we handle only images uploaded to this site. |
| 514 |
if ( false === strpos( $src, $this->upload_dir ) ) { |
| 515 |
continue; |
| 516 |
} |
| 517 |
|
| 518 |
// try to get the declared sizes from the img tag |
| 519 |
if ( preg_match( '#width=["|\']?([\d%]+)["|\']?#i', $images['img_tag'][ $index ], $width_string ) ) { |
| 520 |
$width = $width_string[1]; |
| 521 |
} |
| 522 |
|
| 523 |
if ( preg_match( '#height=["|\']?([\d%]+)["|\']?#i', $images['img_tag'][ $index ], $height_string ) ) { |
| 524 |
$height = $height_string[1]; |
| 525 |
} |
| 526 |
|
| 527 |
// Detect WP registered image size from HTML class |
| 528 |
if ( preg_match( '#class=["|\']?[^"\']*size-([^"\'\s]+)[^"\']*["|\']?#i', $images['img_tag'][ $index ], $size ) ) { |
| 529 |
$size = array_pop( $size ); |
| 530 |
|
| 531 |
if ( false === $width && false === $height && 'full' != $size && array_key_exists( $size, $image_sizes ) ) { |
| 532 |
$width = (int) $image_sizes[ $size ]['width']; |
| 533 |
$height = (int) $image_sizes[ $size ]['height']; |
| 534 |
} |
| 535 |
} else { |
| 536 |
unset( $size ); |
| 537 |
} |
| 538 |
|
| 539 |
$new_sizes = $this->validate_image_sizes( $width, $height ); |
| 540 |
|
| 541 |
$new_url = $this->get_imgcdn_url( $src, $new_sizes ); |
| 542 |
if ( $new_url === $src ) { |
| 543 |
continue; |
| 544 |
} |
| 545 |
// replace the url in hrefs or links |
| 546 |
if ( ! empty( $images['link_url'][ $index ] ) ) { |
| 547 |
if ( $this->check_mimetype( $images['link_url'][ $index ] ) ) { |
| 548 |
$new_tag = preg_replace( '#(href=["|\'])' . $images['link_url'][ $index ] . '(["|\'])#i', '\1' . $new_url . '\2', $tag, 1 ); |
| 549 |
} |
| 550 |
} |
| 551 |
|
| 552 |
// replace the new sizes |
| 553 |
$new_tag = str_replace( 'width="' . $width . '"', 'width="' . $new_sizes['width'] . '"', $new_tag ); |
| 554 |
$new_tag = str_replace( 'height="' . $height . '"', 'height="' . $new_sizes['height'] . '"', $new_tag ); |
| 555 |
// replace the new url |
| 556 |
$new_tag = str_replace( 'src="' . $src . '"', 'src="' . $new_url . '"', $new_tag ); |
| 557 |
|
| 558 |
$content = str_replace( $tag, $new_tag, $content ); |
| 559 |
} |
| 560 |
|
| 561 |
return $content; |
| 562 |
} |
| 563 |
|
| 564 |
/** |
| 565 |
* Match all images and any relevant <a> tags in a block of HTML. |
| 566 |
* |
| 567 |
* @param string $content Some HTML. |
| 568 |
* |
| 569 |
* @return array An array of $images matches, where $images[0] is |
| 570 |
* an array of full matches, and the link_url, img_tag, |
| 571 |
* and img_url keys are arrays of those matches. |
| 572 |
*/ |
| 573 |
protected static function parse_images_from_html( $content ) { |
| 574 |
$images = array(); |
| 575 |
|
| 576 |
if ( preg_match_all( '#(?:<a[^>]+?href=["|\'](?P<link_url>[^\s]+?)["|\'][^>]*?>\s*)?(?P<img_tag><img[^>]*?\s+?src=["|\'](?P<img_url>[^\s]+?)["|\'].*?>){1}(?:\s*</a>)?#is', $content, $images ) ) { |
| 577 |
foreach ( $images as $key => $unused ) { |
| 578 |
// Simplify the output as much as possible, mostly for confirming test results. |
| 579 |
if ( is_numeric( $key ) && $key > 0 ) { |
| 580 |
unset( $images[ $key ] ); |
| 581 |
} |
| 582 |
} |
| 583 |
|
| 584 |
return $images; |
| 585 |
} |
| 586 |
|
| 587 |
return array(); |
| 588 |
} |
| 589 |
|
| 590 |
/** |
| 591 |
* Replace image URLs in the srcset attributes and in case there is a resize in action, also replace the sizes. |
| 592 |
* |
| 593 |
* @param array $sources Array of image sources. |
| 594 |
* @param array $size_array Array of width and height values in pixels (in that order). |
| 595 |
* @param array $image_src The 'src' of the image. |
| 596 |
* @param array $image_meta The image meta data as returned by 'wp_get_attachment_metadata()'. |
| 597 |
* @param int $attachment_id Image attachment ID. |
| 598 |
* |
| 599 |
* @return array |
| 600 |
*/ |
| 601 |
public function filter_srcset_attr( $sources = array(), $size_array = array(), $image_src = array(), $image_meta = array(), $attachment_id = 0 ) { |
| 602 |
if ( ! is_array( $sources ) ) { |
| 603 |
return $sources; |
| 604 |
} |
| 605 |
$used = array(); |
| 606 |
$new_sources = array(); |
| 607 |
foreach ( $sources as $i => $source ) { |
| 608 |
list( $width, $height ) = self::parse_dimensions_from_filename( $source['url'] ); |
| 609 |
|
| 610 |
if ( empty( $width ) ) { |
| 611 |
$width = $image_meta['width']; |
| 612 |
} |
| 613 |
|
| 614 |
if ( empty( $height ) ) { |
| 615 |
$height = $image_meta['height']; |
| 616 |
} |
| 617 |
|
| 618 |
$new_sizes = $this->validate_image_sizes( $width, $height ); |
| 619 |
$new_url = $this->get_imgcdn_url( $source['url'], $new_sizes ); |
| 620 |
if ( isset( $used[ md5( $new_url ) ] ) ) { |
| 621 |
continue; |
| 622 |
} |
| 623 |
|
| 624 |
$used[ md5( $new_url ) ] = true; |
| 625 |
$new_sources[ $i ] = $sources[ $i ]; |
| 626 |
$new_sources[ $i ]['url'] = $new_url; |
| 627 |
|
| 628 |
if ( $new_sources[ $i ]['descriptor'] ) { |
| 629 |
$new_sources[ $i ]['value'] = $new_sizes['width']; |
| 630 |
} else { |
| 631 |
$new_sources[ $i ]['value'] = $new_sizes['height']; |
| 632 |
} |
| 633 |
} |
| 634 |
|
| 635 |
return $new_sources; |
| 636 |
} |
| 637 |
|
| 638 |
/** |
| 639 |
* Try to determine height and width from strings WP appends to resized image filenames. |
| 640 |
* |
| 641 |
* @param string $src The image URL. |
| 642 |
* |
| 643 |
* @return array An array consisting of width and height. |
| 644 |
*/ |
| 645 |
public static function parse_dimensions_from_filename( $src ) { |
| 646 |
$width_height_string = array(); |
| 647 |
$extensions = array_keys( self::$extensions ); |
| 648 |
if ( preg_match( '#-(\d+)x(\d+)\.(?:' . implode( '|', $extensions ) . '){1}$#i', $src, $width_height_string ) ) { |
| 649 |
$width = (int) $width_height_string[1]; |
| 650 |
$height = (int) $width_height_string[2]; |
| 651 |
|
| 652 |
if ( $width && $height ) { |
| 653 |
return array( $width, $height ); |
| 654 |
} |
| 655 |
} |
| 656 |
|
| 657 |
return array( false, false ); |
| 658 |
} |
| 659 |
|
| 660 |
/** |
| 661 |
* Handles the url replacement in options and theme mods. |
| 662 |
*/ |
| 663 |
public function filter_options_and_mods() { |
| 664 |
/** |
| 665 |
* `optml_imgcdn_options_with_url` is a filter that allows themes or plugins to select which option |
| 666 |
* holds an url and needs an optimization. |
| 667 |
*/ |
| 668 |
$theme_slug = get_option( 'stylesheet' ); |
| 669 |
|
| 670 |
$options_list = apply_filters( |
| 671 |
'optml_imgcdn_options_with_url', array( |
| 672 |
"theme_mods_$theme_slug", |
| 673 |
) |
| 674 |
); |
| 675 |
|
| 676 |
foreach ( $options_list as $option ) { |
| 677 |
add_filter( "option_$option", array( $this, 'replace_option_url' ) ); |
| 678 |
|
| 679 |
// this one will not work for theme mods, since get_theme_mod('header_image', $default) has its own default. |
| 680 |
// add_filter( "default_option_$option", array( $this, 'replace_option_url' ) ); |
| 681 |
} |
| 682 |
|
| 683 |
} |
| 684 |
|
| 685 |
/** |
| 686 |
* A filter which turns a local url into an optimized CDN image url or an array of image urls. |
| 687 |
* |
| 688 |
* @param string $url The url which should be replaced. |
| 689 |
* |
| 690 |
* @return string Replaced url. |
| 691 |
*/ |
| 692 |
public function replace_option_url( $url ) { |
| 693 |
if ( empty( $url ) ) { |
| 694 |
return $url; |
| 695 |
} |
| 696 |
// $url might be an array or an json encoded array with urls. |
| 697 |
if ( is_array( $url ) || filter_var( $url, FILTER_VALIDATE_URL ) === false ) { |
| 698 |
$array = $url; |
| 699 |
$encoded = false; |
| 700 |
|
| 701 |
// it might a json encoded array |
| 702 |
if ( is_string( $url ) ) { |
| 703 |
$array = json_decode( $url, true ); |
| 704 |
$encoded = true; |
| 705 |
} |
| 706 |
|
| 707 |
// in case there is an array, apply it recursively. |
| 708 |
if ( is_array( $array ) ) { |
| 709 |
foreach ( $array as $index => $value ) { |
| 710 |
$array[ $index ] = $this->replace_option_url( $value ); |
| 711 |
} |
| 712 |
|
| 713 |
if ( $encoded ) { |
| 714 |
return json_encode( $array ); |
| 715 |
} else { |
| 716 |
return $array; |
| 717 |
} |
| 718 |
} |
| 719 |
|
| 720 |
if ( filter_var( $url, FILTER_VALIDATE_URL ) === false ) { |
| 721 |
return $url; |
| 722 |
} |
| 723 |
} |
| 724 |
|
| 725 |
// we handle only images uploaded to this site./ |
| 726 |
// @TODO this is still wrong, not all the images are coming from the uploads folder. |
| 727 |
// if ( false === strpos( $url, $this->upload_dir ) ) { |
| 728 |
// return $url; |
| 729 |
// } |
| 730 |
// get the optimized url. |
| 731 |
$new_url = $this->get_imgcdn_url( $url ); |
| 732 |
|
| 733 |
return $new_url; |
| 734 |
} |
| 735 |
|
| 736 |
/** |
| 737 |
* Replace urls in post meta values. |
| 738 |
* |
| 739 |
* @param mixed $metadata Metadata. |
| 740 |
* @param int $object_id Post id. |
| 741 |
* @param string $meta_key Meta key. |
| 742 |
* @param bool $single Is single? |
| 743 |
* |
| 744 |
* @return mixed Altered meta. |
| 745 |
*/ |
| 746 |
function replace_meta( $metadata, $object_id, $meta_key, $single ) { |
| 747 |
|
| 748 |
$meta_needed = '_elementor_data'; |
| 749 |
|
| 750 |
if ( isset( $meta_key ) && $meta_needed == $meta_key ) { |
| 751 |
remove_filter( 'get_post_metadata', array( $this, 'replace_meta' ), PHP_INT_MAX ); |
| 752 |
|
| 753 |
$current_meta = get_post_meta( $object_id, $meta_needed, $single ); |
| 754 |
add_filter( 'get_post_metadata', array( $this, 'replace_meta' ), PHP_INT_MAX, 4 ); |
| 755 |
|
| 756 |
if ( ! is_string( $current_meta ) ) { |
| 757 |
return $metadata; |
| 758 |
} |
| 759 |
|
| 760 |
return $this->replace_urls( $current_meta, 'elementor' ); |
| 761 |
} |
| 762 |
|
| 763 |
// Return original if the check does not pass |
| 764 |
return $metadata; |
| 765 |
} |
| 766 |
|
| 767 |
/** |
| 768 |
* Filter raw content for urls. |
| 769 |
* |
| 770 |
* @param string $html HTML to filter. |
| 771 |
* |
| 772 |
* @return mixed Filtered content. |
| 773 |
*/ |
| 774 |
public function replace_urls( $html, $context = 'raw' ) { |
| 775 |
|
| 776 |
switch ( $context ) { |
| 777 |
case 'elementor': |
| 778 |
$old_urls = $this->extract_slashed_urls( $html ); |
| 779 |
$urls = array_map( 'wp_unslash', $old_urls ); |
| 780 |
$urls = array_combine( $old_urls, $urls ); |
| 781 |
//return $html; |
| 782 |
break; |
| 783 |
case 'raw': |
| 784 |
default: |
| 785 |
$urls = wp_extract_urls( $html ); |
| 786 |
|
| 787 |
$urls = array_combine( $urls, $urls ); |
| 788 |
break; |
| 789 |
|
| 790 |
} |
| 791 |
|
| 792 |
$cdn_url = $this->cdn_url; |
| 793 |
$site_url = get_site_url(); |
| 794 |
$urls = array_filter( |
| 795 |
$urls, function ( $url ) use ( $cdn_url, $site_url ) { |
| 796 |
if ( strpos( $url, $cdn_url ) !== false ) { |
| 797 |
return false; |
| 798 |
} |
| 799 |
if ( strpos( $url, $site_url ) === false ) { |
| 800 |
return false; |
| 801 |
} |
| 802 |
|
| 803 |
return $this->check_mimetype( $url ); |
| 804 |
} |
| 805 |
); |
| 806 |
|
| 807 |
$urls = array_map( array( $this, 'get_imgcdn_url' ), $urls ); |
| 808 |
|
| 809 |
return str_replace( array_keys( $urls ), array_values( $urls ), $html ); |
| 810 |
} |
| 811 |
|
| 812 |
/** |
| 813 |
* Extract slashed urls from content. |
| 814 |
* |
| 815 |
* @param string $content Content to parse. |
| 816 |
* |
| 817 |
* @return array Urls found. |
| 818 |
*/ |
| 819 |
private function extract_slashed_urls( $content ) { |
| 820 |
/** |
| 821 |
* Regex rule to match slashed urls, i.e -> http:\/\/optimole.com\/wp-content\/uploads\/2018\/09\/picture.jpg |
| 822 |
* Based on the extract_url patter. |
| 823 |
* |
| 824 |
* @var string Regex rule string. |
| 825 |
* |
| 826 |
*/ |
| 827 |
$regex = "/(http(s)*.+?)\"/"; |
| 828 |
|
| 829 |
preg_match_all( |
| 830 |
$regex, |
| 831 |
$content, |
| 832 |
$urls |
| 833 |
); |
| 834 |
|
| 835 |
$urls = array_map( function ( $value ) { |
| 836 |
return rtrim( html_entity_decode( $value ), '\\' ); |
| 837 |
}, $urls[1] ); |
| 838 |
|
| 839 |
$urls = array_unique( $urls ); |
| 840 |
|
| 841 |
return array_values( $urls ); |
| 842 |
} |
| 843 |
|
| 844 |
/** |
| 845 |
* Throw error on object clone |
| 846 |
* |
| 847 |
* The whole idea of the singleton design pattern is that there is a single |
| 848 |
* object therefore, we don't want the object to be cloned. |
| 849 |
* |
| 850 |
* @access public |
| 851 |
* @since 1.0.0 |
| 852 |
* @return void |
| 853 |
*/ |
| 854 |
public function __clone() { |
| 855 |
// Cloning instances of the class is forbidden. |
| 856 |
_doing_it_wrong( __FUNCTION__, esc_html__( 'Cheatin’ huh?', 'optimole-wp' ), '1.0.0' ); |
| 857 |
} |
| 858 |
|
| 859 |
/** |
| 860 |
* Disable unserializing of the class |
| 861 |
* |
| 862 |
* @access public |
| 863 |
* @since 1.0.0 |
| 864 |
* @return void |
| 865 |
*/ |
| 866 |
public function __wakeup() { |
| 867 |
// Unserializing instances of the class is forbidden. |
| 868 |
_doing_it_wrong( __FUNCTION__, esc_html__( 'Cheatin’ huh?', 'optimole-wp' ), '1.0.0' ); |
| 869 |
} |
| 870 |
|
| 871 |
} |
| 872 |
|
