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wp-content/plugins/themeisle-companion/obfx_modules/image-cdn/inc/class-orbit-fox-image-replacer.php0000604 00000045702 15114517261 0035650 0 ustar 00 home/xbodynamge/crosstraining <?php
namespace OrbitFox;
/**
* The class handles the image replacements and optimizations.
*
* @package \OrbitFox\Image_CDN_Replacer
* @author Themeisle <friends@themeisle.com>
*/
class Image_CDN_Replacer {
/**
* Cached object instance.
*
* @var Image_CDN_Replacer
*/
protected static $instance = null;
/**
* A data holder.
*
* @var null
*/
protected $connect_data = null;
/**
* A list of allowd extensions.
*
* @var array
*/
protected static $extensions = array(
'jpg|jpeg|jpe' => 'image/jpeg',
'png' => 'image/png',
'webp' => 'image/webp',
);
/**
* Holds an array of image sizes.
*
* @var array
*/
protected static $image_sizes;
/**
* Te cdn url, it will be build on the run.
*
* @var null
*/
protected $cdn_url = null;
/**
* A secret key to encode payload.
*
* @var null
*/
protected $cdn_secret = null;
/**
* Defines which is the maximum width accepted in the optimization process.
*
* @var int
*/
protected $max_width = 3000;
/**
* Defines which is the maximum width accepted in the optimization process.
*
* @var int
*/
protected $max_height = 3000;
/**
* Holds the real images sizes as an array.
*
* @var null
*/
protected $img_real_sizes = null;
/**
* A cached version of `wp_upload_dir`
*
* @var null
*/
protected $upload_dir = null;
/**
* Class instance method.
*
* @static
* @since 1.0.0
* @access public
* @return Image_CDN_Replacer
*/
public static function instance() {
if ( is_null( self::$instance ) ) {
self::$instance = new self();
self::$instance->init();
}
return self::$instance;
}
/**
* The initialize method.
*/
function init() {
$this->set_properties();
add_filter( 'image_downsize', array( $this, 'filter_image_downsize' ), PHP_INT_MAX, 3 );
add_filter( 'the_content', array( $this, 'filter_the_content' ), PHP_INT_MAX );
add_filter( 'wp_calculate_image_srcset', array( $this, 'filter_srcset_attr' ), PHP_INT_MAX, 5 );
add_filter( 'init', array( $this, 'filter_options_and_mods' ) );
add_action( 'init', array( $this, 'init_html_replacer' ), PHP_INT_MAX );
}
/**
* Set the cdn url based on the current connected user.
*/
protected function set_properties() {
$this->upload_dir = wp_upload_dir();
$this->upload_dir = $this->upload_dir['baseurl'];
$this->connect_data = get_option( 'obfx_connect_data' );
if ( empty( $this->connect_data ) ) {
return;
}
if ( empty( $this->connect_data['image_cdn'] ) ) {
return;
}
$this->cdn_secret = $this->connect_data['image_cdn']['secret'];
$this->cdn_url = sprintf(
'https://%s.%s',
strtolower( $this->connect_data['image_cdn']['key'] ),
'i.optimole.com'
);
}
/**
* Init html replacer handler.
*/
public function init_html_replacer() {
if ( is_admin() ) {
return;
}
ob_start(
array( &$this, 'filter_raw_content' )
);
}
/**
* Filter raw content for urls.
*
* @param string $html HTML to filter.
*
* @return mixed Filtered content.
*/
public function filter_raw_content( $html ) {
$urls = wp_extract_urls( $html );
$cdn_url = $this->cdn_url;
$site_url = get_site_url();
$urls = array_filter(
$urls,
function ( $url ) use ( $cdn_url, $site_url ) {
if ( strpos( $url, $cdn_url ) !== false ) {
return false;
}
if ( strpos( $url, $site_url ) === false ) {
return false;
}
return $this->check_mimetype( $url );
}
);
$new_urls = array_map( array( $this, 'get_imgcdn_url' ), $urls );
return str_replace( $urls, $new_urls, $html );
}
/**
* Check url mimetype.
*
* @param string $url Url to check.
*
* @return bool Is a valid image url or not.
*/
private function check_mimetype( $url ) {
$mimes = self::$extensions;
$type = wp_check_filetype( $url, $mimes );
if ( ! isset( $type['ext'] ) || empty( $type['ext'] ) ) {
return false;
}
return true;
}
/**
* This filter will replace all the images retrieved via "wp_get_image" type of functions.
*
* @param array $image The filtered value.
* @param int $attachment_id The related attachment id.
* @param array|string $size This could be the name of the thumbnail size or an array of custom dimensions.
*
* @return array
*/
public function filter_image_downsize( $image, $attachment_id, $size ) {
// we don't run optimizations on dashboard side
if ( is_admin() ) {
return $image;
}
$image_url = wp_get_attachment_url( $attachment_id );
if ( $image_url ) {
// $image_meta = image_get_intermediate_size( $attachment_id, $size );
$image_meta = wp_get_attachment_metadata( $attachment_id );
$image_args = self::image_sizes();
// default size
$sizes = array(
'width' => isset( $image_meta['width'] ) ? $image_meta['width'] : 'auto',
'height' => isset( $image_meta['height'] ) ? $image_meta['height'] : 'auto',
);
// in case there is a custom image size $size will be an array.
if ( is_array( $size ) ) {
$sizes = array(
'width' => $size[0],
'height' => $size[1],
);
} elseif ( 'full' !== $size && isset( $image_args[ $size ] ) ) { // overwrite if there a size
$sizes = array(
'width' => $image_args[ $size ]['width'],
'height' => $image_args[ $size ]['height'],
);
}
$new_sizes = $this->validate_image_sizes( $sizes['width'], $sizes['height'] );
// resized thumbnails will have their own filenames. we should get those instead of the full image one
if ( is_string( $size ) && ! empty( $image_meta['sizes'] ) && ! empty( $image_meta['sizes'][ $size ] ) ) {
$image_url = str_replace( basename( $image_url ), $image_meta['sizes'][ $size ]['file'], $image_url );
}
// try to get an optimized image url.
$new_url = $this->get_imgcdn_url( $image_url, $new_sizes );
$return = array(
$new_url,
$sizes['width'],
$sizes['height'],
false,
);
return $return;
}
// in case something wrong comes, well return the default.
return $image;
}
/**
* Returns the array of image sizes since `get_intermediate_image_sizes` and image metadata doesn't include the
* custom image sizes in a reliable way.
*
* Inspired from jetpack/photon.
*
* @global $wp_additional_image_sizes
*
* @return array
*/
protected static function image_sizes() {
if ( null == self::$image_sizes ) {
global $_wp_additional_image_sizes;
// Populate an array matching the data structure of $_wp_additional_image_sizes so we have a consistent structure for image sizes
$images = array(
'thumb' => array(
'width' => intval( get_option( 'thumbnail_size_w' ) ),
'height' => intval( get_option( 'thumbnail_size_h' ) ),
'crop' => (bool) get_option( 'thumbnail_crop' ),
),
'medium' => array(
'width' => intval( get_option( 'medium_size_w' ) ),
'height' => intval( get_option( 'medium_size_h' ) ),
'crop' => false,
),
'large' => array(
'width' => intval( get_option( 'large_size_w' ) ),
'height' => intval( get_option( 'large_size_h' ) ),
'crop' => false,
),
'full' => array(
'width' => null,
'height' => null,
'crop' => false,
),
);
// Compatibility mapping as found in wp-includes/media.php
$images['thumbnail'] = $images['thumb'];
// Update class variable, merging in $_wp_additional_image_sizes if any are set
if ( is_array( $_wp_additional_image_sizes ) && ! empty( $_wp_additional_image_sizes ) ) {
self::$image_sizes = array_merge( $images, $_wp_additional_image_sizes );
} else {
self::$image_sizes = $images;
}
}
return is_array( self::$image_sizes ) ? self::$image_sizes : array();
}
/**
* Keep the image sizes under a sane limit.
*
* @param string $width The width value which should be sanitized.
* @param string $height The height value which should be sanitized.
*
* @return array
*/
protected function validate_image_sizes( $width, $height ) {
global $content_width;
/**
* While we are inside a content filter we need to keep our max_width under the content_width global
* There is no reason the have a image wider than the content width.
*/
if (
doing_filter( 'the_content' )
&& isset( $GLOBALS['content_width'] )
&& apply_filters( 'optml_imgcdn_allow_resize_images_from_content_width', true )
) {
$content_width = (int) $GLOBALS['content_width'];
if ( $this->max_width > $content_width ) {
$this->max_width = $content_width;
}
}
$percentWidth = $percentHeight = null;
if ( $width > $this->max_width ) {
// we need to remember how much in percentage the width was resized and apply the same treatment to the height.
$percentWidth = ( 1 - $this->max_width / $width ) * 100;
$width = $this->max_width;
$height = round( $height * ( ( 100 - $percentWidth ) / 100 ), 0 );
}
// now for the height
if ( $height > $this->max_height ) {
$percentHeight = ( 1 - $this->max_height / $height ) * 100;
// if we reduce the height to max_height by $x percentage than we'll also reduce the width for the same amount.
$height = $this->max_height;
$width = round( $width * ( ( 100 - $percentHeight ) / 100 ), 0 );
}
return array(
'width' => $width,
'height' => $height,
);
}
/**
* Returns a signed image url authorized to be used in our CDN.
*
* @param string $url The url which should be signed.
* @param array $args Dimension params; Supports `width` and `height`.
*
* @return string
*/
protected function get_imgcdn_url( $url, $args = array( 'width' => 'auto', 'height' => 'auto' ) ) {
if ( ! $this->check_mimetype( $url ) ) {
return $url;
}
// not used yet.
$compress_level = 55;
// this will authorize the image
$url_parts = explode( '://', $url );
$scheme = $url_parts[0];
$path = $url_parts[1];
if ( $args['width'] !== 'auto' ) {
$args['width'] = round( $args['width'], 0 );
}
if ( $args['height'] !== 'auto' ) {
$args['height'] = round( $args['height'], 0 );
}
$payload = array(
'path' => $this->urlception_encode( $path ),
'scheme' => $scheme,
'width' => (string) $args['width'],
'height' => (string) $args['height'],
'quality' => (string) $compress_level,
);
ksort( $payload );
$values = array_values( $payload );
$payload = implode( '', $values );
$hash = hash_hmac( 'md5', $payload, $this->cdn_secret );
$new_url = sprintf(
'%s/%s/%s/%s/%s/%s/%s',
$this->cdn_url,
$hash,
(string) $args['width'],
(string) $args['height'],
(string) $compress_level,
$scheme,
$path
);
return $new_url;
}
/**
* Ensures that an url parameter can stand inside an url.
*
* @param string $url The required url.
*
* @return string
*/
protected function urlception_encode( $url ) {
$new_url = rtrim( $url, '/' );
return urlencode( $new_url );
}
/**
* Identify images in post content.
*
* @param string $content The post content which will be filtered.
*
* @return string
*/
public function filter_the_content( $content ) {
$images = self::parse_images_from_html( $content );
if ( empty( $images ) ) {
return $content; // simple. no images
}
$image_sizes = self::image_sizes();
foreach ( $images[0] as $index => $tag ) {
$width = $height = false;
$new_tag = $tag;
$src = $images['img_url'][ $index ];
if ( apply_filters( 'optml_imgcdn_disable_optimization_for_link', false, $src ) ) {
continue;
}
if ( false !== strpos( $src, 'i.optimole.com' ) ) {
continue; // we already have this
}
// we handle only images uploaded to this site.
if ( false === strpos( $src, $this->upload_dir ) ) {
continue;
}
// try to get the declared sizes from the img tag
if ( preg_match( '#width=["|\']?([\d%]+)["|\']?#i', $images['img_tag'][ $index ], $width_string ) ) {
$width = $width_string[1];
}
if ( preg_match( '#height=["|\']?([\d%]+)["|\']?#i', $images['img_tag'][ $index ], $height_string ) ) {
$height = $height_string[1];
}
// Detect WP registered image size from HTML class
if ( preg_match( '#class=["|\']?[^"\']*size-([^"\'\s]+)[^"\']*["|\']?#i', $images['img_tag'][ $index ], $size ) ) {
$size = array_pop( $size );
if ( false === $width && false === $height && 'full' != $size && array_key_exists( $size, $image_sizes ) ) {
$width = (int) $image_sizes[ $size ]['width'];
$height = (int) $image_sizes[ $size ]['height'];
}
} else {
unset( $size );
}
$new_sizes = $this->validate_image_sizes( $width, $height );
$new_url = $this->get_imgcdn_url( $src, $new_sizes );
// replace the url in hrefs or links
if ( ! empty( $images['link_url'][ $index ] ) ) {
if ( $this->check_mimetype( $images['link_url'][ $index ] ) ) {
$new_tag = preg_replace( '#(href=["|\'])' . $images['link_url'][ $index ] . '(["|\'])#i', '\1' . $new_url . '\2', $tag, 1 );
}
}
// replace the new sizes
$new_tag = str_replace( 'width="' . $width . '"', 'width="' . $new_sizes['width'] . '"', $new_tag );
$new_tag = str_replace( 'height="' . $height . '"', 'height="' . $new_sizes['height'] . '"', $new_tag );
// replace the new url
$new_tag = str_replace( 'src="' . $src . '"', 'src="' . $new_url . '"', $new_tag );
$content = str_replace( $tag, $new_tag, $content );
}
return $content;
}
/**
* Match all images and any relevant <a> tags in a block of HTML.
*
* @param string $content Some HTML.
*
* @return array An array of $images matches, where $images[0] is
* an array of full matches, and the link_url, img_tag,
* and img_url keys are arrays of those matches.
*/
protected static function parse_images_from_html( $content ) {
$images = array();
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 ) ) {
foreach ( $images as $key => $unused ) {
// Simplify the output as much as possible, mostly for confirming test results.
if ( is_numeric( $key ) && $key > 0 ) {
unset( $images[ $key ] );
}
}
return $images;
}
return array();
}
/**
* Replace image URLs in the srcset attributes and in case there is a resize in action, also replace the sizes.
*
* @param array $sources Array of image sources.
* @param array $size_array Array of width and height values in pixels (in that order).
* @param array $image_src The 'src' of the image.
* @param array $image_meta The image meta data as returned by 'wp_get_attachment_metadata()'.
* @param int $attachment_id Image attachment ID.
*
* @return array
*/
public function filter_srcset_attr( $sources = array(), $size_array = array(), $image_src = array(), $image_meta = array(), $attachment_id = 0 ) {
if ( ! is_array( $sources ) ) {
return $sources;
}
$used = array();
$new_sources = array();
foreach ( $sources as $i => $source ) {
list( $width, $height ) = self::parse_dimensions_from_filename( $source['url'] );
if ( empty( $width ) ) {
$width = $image_meta['width'];
}
if ( empty( $height ) ) {
$height = $image_meta['height'];
}
$new_sizes = $this->validate_image_sizes( $width, $height );
$new_url = $this->get_imgcdn_url( $source['url'], $new_sizes );
if ( isset( $used[ md5( $new_url ) ] ) ) {
continue;
}
$used[ md5( $new_url ) ] = true;
$new_sources[ $i ] = $sources[ $i ];
$new_sources[ $i ]['url'] = $new_url;
if ( $new_sources[ $i ]['descriptor'] ) {
$new_sources[ $i ]['value'] = $new_sizes['width'];
} else {
$new_sources[ $i ]['value'] = $new_sizes['height'];
}
}
return $sources;
}
/**
* Try to determine height and width from strings WP appends to resized image filenames.
*
* @param string $src The image URL.
*
* @return array An array consisting of width and height.
*/
public static function parse_dimensions_from_filename( $src ) {
$width_height_string = array();
$extensions = array_keys( self::$extensions );
if ( preg_match( '#-(\d+)x(\d+)\.(?:' . implode( '|', $extensions ) . '){1}$#i', $src, $width_height_string ) ) {
$width = (int) $width_height_string[1];
$height = (int) $width_height_string[2];
if ( $width && $height ) {
return array( $width, $height );
}
}
return array( false, false );
}
/**
* Handles the url replacement in options and theme mods.
*/
public function filter_options_and_mods() {
/**
* `optml_imgcdn_options_with_url` is a filter that allows themes or plugins to select which option
* holds an url and needs an optimization.
*/
$theme_slug = get_option( 'stylesheet' );
$options_list = apply_filters(
'optml_imgcdn_options_with_url',
array(
"theme_mods_$theme_slug",
)
);
foreach ( $options_list as $option ) {
add_filter( "option_$option", array( $this, 'replace_option_url' ) );
// this one will not work for theme mods, since get_theme_mod('header_image', $default) has its own default.
// add_filter( "default_option_$option", array( $this, 'replace_option_url' ) );
}
}
/**
* A filter which turns a local url into an optimized CDN image url or an array of image urls.
*
* @param string $url The url which should be replaced.
*
* @return string Replaced url.
*/
public function replace_option_url( $url ) {
if ( empty( $url ) ) {
return $url;
}
// $url might be an array or an json encoded array with urls.
if ( is_array( $url ) || filter_var( $url, FILTER_VALIDATE_URL ) === false ) {
$array = $url;
$encoded = false;
// it might a json encoded array
if ( is_string( $url ) ) {
$array = json_decode( $url, true );
$encoded = true;
}
// in case there is an array, apply it recursively.
if ( is_array( $array ) ) {
foreach ( $array as $index => $value ) {
$array[ $index ] = $this->replace_option_url( $value );
}
if ( $encoded ) {
return json_encode( $array );
} else {
return $array;
}
}
if ( filter_var( $url, FILTER_VALIDATE_URL ) === false ) {
return $url;
}
}
// we handle only images uploaded to this site./
// @TODO this is still wrong, not all the images are coming from the uploads folder.
// if ( false === strpos( $url, $this->upload_dir ) ) {
// return $url;
// }
// get the optimized url.
$new_url = $this->get_imgcdn_url( $url );
return $new_url;
}
/**
* Throw error on object clone
*
* The whole idea of the singleton design pattern is that there is a single
* object therefore, we don't want the object to be cloned.
*
* @access public
* @since 1.0.0
* @return void
*/
public function __clone() {
// Cloning instances of the class is forbidden.
_doing_it_wrong( __FUNCTION__, esc_html__( 'Cheatin’ huh?', 'themeisle-companion' ), '1.0.0' );
}
/**
* Disable unserializing of the class
*
* @access public
* @since 1.0.0
* @return void
*/
public function __wakeup() {
// Unserializing instances of the class is forbidden.
_doing_it_wrong( __FUNCTION__, esc_html__( 'Cheatin’ huh?', 'themeisle-companion' ), '1.0.0' );
}
}
wp-content/plugins/themeisle-companion/obfx_modules/image-cdn/inc/class-orbit-fox-image-replacer.php0000644 00000045702 15114661734 0033552 0 ustar 00 home/xbodynamge/dev <?php
namespace OrbitFox;
/**
* The class handles the image replacements and optimizations.
*
* @package \OrbitFox\Image_CDN_Replacer
* @author Themeisle <friends@themeisle.com>
*/
class Image_CDN_Replacer {
/**
* Cached object instance.
*
* @var Image_CDN_Replacer
*/
protected static $instance = null;
/**
* A data holder.
*
* @var null
*/
protected $connect_data = null;
/**
* A list of allowd extensions.
*
* @var array
*/
protected static $extensions = array(
'jpg|jpeg|jpe' => 'image/jpeg',
'png' => 'image/png',
'webp' => 'image/webp',
);
/**
* Holds an array of image sizes.
*
* @var array
*/
protected static $image_sizes;
/**
* Te cdn url, it will be build on the run.
*
* @var null
*/
protected $cdn_url = null;
/**
* A secret key to encode payload.
*
* @var null
*/
protected $cdn_secret = null;
/**
* Defines which is the maximum width accepted in the optimization process.
*
* @var int
*/
protected $max_width = 3000;
/**
* Defines which is the maximum width accepted in the optimization process.
*
* @var int
*/
protected $max_height = 3000;
/**
* Holds the real images sizes as an array.
*
* @var null
*/
protected $img_real_sizes = null;
/**
* A cached version of `wp_upload_dir`
*
* @var null
*/
protected $upload_dir = null;
/**
* Class instance method.
*
* @static
* @since 1.0.0
* @access public
* @return Image_CDN_Replacer
*/
public static function instance() {
if ( is_null( self::$instance ) ) {
self::$instance = new self();
self::$instance->init();
}
return self::$instance;
}
/**
* The initialize method.
*/
function init() {
$this->set_properties();
add_filter( 'image_downsize', array( $this, 'filter_image_downsize' ), PHP_INT_MAX, 3 );
add_filter( 'the_content', array( $this, 'filter_the_content' ), PHP_INT_MAX );
add_filter( 'wp_calculate_image_srcset', array( $this, 'filter_srcset_attr' ), PHP_INT_MAX, 5 );
add_filter( 'init', array( $this, 'filter_options_and_mods' ) );
add_action( 'init', array( $this, 'init_html_replacer' ), PHP_INT_MAX );
}
/**
* Set the cdn url based on the current connected user.
*/
protected function set_properties() {
$this->upload_dir = wp_upload_dir();
$this->upload_dir = $this->upload_dir['baseurl'];
$this->connect_data = get_option( 'obfx_connect_data' );
if ( empty( $this->connect_data ) ) {
return;
}
if ( empty( $this->connect_data['image_cdn'] ) ) {
return;
}
$this->cdn_secret = $this->connect_data['image_cdn']['secret'];
$this->cdn_url = sprintf(
'https://%s.%s',
strtolower( $this->connect_data['image_cdn']['key'] ),
'i.optimole.com'
);
}
/**
* Init html replacer handler.
*/
public function init_html_replacer() {
if ( is_admin() ) {
return;
}
ob_start(
array( &$this, 'filter_raw_content' )
);
}
/**
* Filter raw content for urls.
*
* @param string $html HTML to filter.
*
* @return mixed Filtered content.
*/
public function filter_raw_content( $html ) {
$urls = wp_extract_urls( $html );
$cdn_url = $this->cdn_url;
$site_url = get_site_url();
$urls = array_filter(
$urls,
function ( $url ) use ( $cdn_url, $site_url ) {
if ( strpos( $url, $cdn_url ) !== false ) {
return false;
}
if ( strpos( $url, $site_url ) === false ) {
return false;
}
return $this->check_mimetype( $url );
}
);
$new_urls = array_map( array( $this, 'get_imgcdn_url' ), $urls );
return str_replace( $urls, $new_urls, $html );
}
/**
* Check url mimetype.
*
* @param string $url Url to check.
*
* @return bool Is a valid image url or not.
*/
private function check_mimetype( $url ) {
$mimes = self::$extensions;
$type = wp_check_filetype( $url, $mimes );
if ( ! isset( $type['ext'] ) || empty( $type['ext'] ) ) {
return false;
}
return true;
}
/**
* This filter will replace all the images retrieved via "wp_get_image" type of functions.
*
* @param array $image The filtered value.
* @param int $attachment_id The related attachment id.
* @param array|string $size This could be the name of the thumbnail size or an array of custom dimensions.
*
* @return array
*/
public function filter_image_downsize( $image, $attachment_id, $size ) {
// we don't run optimizations on dashboard side
if ( is_admin() ) {
return $image;
}
$image_url = wp_get_attachment_url( $attachment_id );
if ( $image_url ) {
// $image_meta = image_get_intermediate_size( $attachment_id, $size );
$image_meta = wp_get_attachment_metadata( $attachment_id );
$image_args = self::image_sizes();
// default size
$sizes = array(
'width' => isset( $image_meta['width'] ) ? $image_meta['width'] : 'auto',
'height' => isset( $image_meta['height'] ) ? $image_meta['height'] : 'auto',
);
// in case there is a custom image size $size will be an array.
if ( is_array( $size ) ) {
$sizes = array(
'width' => $size[0],
'height' => $size[1],
);
} elseif ( 'full' !== $size && isset( $image_args[ $size ] ) ) { // overwrite if there a size
$sizes = array(
'width' => $image_args[ $size ]['width'],
'height' => $image_args[ $size ]['height'],
);
}
$new_sizes = $this->validate_image_sizes( $sizes['width'], $sizes['height'] );
// resized thumbnails will have their own filenames. we should get those instead of the full image one
if ( is_string( $size ) && ! empty( $image_meta['sizes'] ) && ! empty( $image_meta['sizes'][ $size ] ) ) {
$image_url = str_replace( basename( $image_url ), $image_meta['sizes'][ $size ]['file'], $image_url );
}
// try to get an optimized image url.
$new_url = $this->get_imgcdn_url( $image_url, $new_sizes );
$return = array(
$new_url,
$sizes['width'],
$sizes['height'],
false,
);
return $return;
}
// in case something wrong comes, well return the default.
return $image;
}
/**
* Returns the array of image sizes since `get_intermediate_image_sizes` and image metadata doesn't include the
* custom image sizes in a reliable way.
*
* Inspired from jetpack/photon.
*
* @global $wp_additional_image_sizes
*
* @return array
*/
protected static function image_sizes() {
if ( null == self::$image_sizes ) {
global $_wp_additional_image_sizes;
// Populate an array matching the data structure of $_wp_additional_image_sizes so we have a consistent structure for image sizes
$images = array(
'thumb' => array(
'width' => intval( get_option( 'thumbnail_size_w' ) ),
'height' => intval( get_option( 'thumbnail_size_h' ) ),
'crop' => (bool) get_option( 'thumbnail_crop' ),
),
'medium' => array(
'width' => intval( get_option( 'medium_size_w' ) ),
'height' => intval( get_option( 'medium_size_h' ) ),
'crop' => false,
),
'large' => array(
'width' => intval( get_option( 'large_size_w' ) ),
'height' => intval( get_option( 'large_size_h' ) ),
'crop' => false,
),
'full' => array(
'width' => null,
'height' => null,
'crop' => false,
),
);
// Compatibility mapping as found in wp-includes/media.php
$images['thumbnail'] = $images['thumb'];
// Update class variable, merging in $_wp_additional_image_sizes if any are set
if ( is_array( $_wp_additional_image_sizes ) && ! empty( $_wp_additional_image_sizes ) ) {
self::$image_sizes = array_merge( $images, $_wp_additional_image_sizes );
} else {
self::$image_sizes = $images;
}
}
return is_array( self::$image_sizes ) ? self::$image_sizes : array();
}
/**
* Keep the image sizes under a sane limit.
*
* @param string $width The width value which should be sanitized.
* @param string $height The height value which should be sanitized.
*
* @return array
*/
protected function validate_image_sizes( $width, $height ) {
global $content_width;
/**
* While we are inside a content filter we need to keep our max_width under the content_width global
* There is no reason the have a image wider than the content width.
*/
if (
doing_filter( 'the_content' )
&& isset( $GLOBALS['content_width'] )
&& apply_filters( 'optml_imgcdn_allow_resize_images_from_content_width', true )
) {
$content_width = (int) $GLOBALS['content_width'];
if ( $this->max_width > $content_width ) {
$this->max_width = $content_width;
}
}
$percentWidth = $percentHeight = null;
if ( $width > $this->max_width ) {
// we need to remember how much in percentage the width was resized and apply the same treatment to the height.
$percentWidth = ( 1 - $this->max_width / $width ) * 100;
$width = $this->max_width;
$height = round( $height * ( ( 100 - $percentWidth ) / 100 ), 0 );
}
// now for the height
if ( $height > $this->max_height ) {
$percentHeight = ( 1 - $this->max_height / $height ) * 100;
// if we reduce the height to max_height by $x percentage than we'll also reduce the width for the same amount.
$height = $this->max_height;
$width = round( $width * ( ( 100 - $percentHeight ) / 100 ), 0 );
}
return array(
'width' => $width,
'height' => $height,
);
}
/**
* Returns a signed image url authorized to be used in our CDN.
*
* @param string $url The url which should be signed.
* @param array $args Dimension params; Supports `width` and `height`.
*
* @return string
*/
protected function get_imgcdn_url( $url, $args = array( 'width' => 'auto', 'height' => 'auto' ) ) {
if ( ! $this->check_mimetype( $url ) ) {
return $url;
}
// not used yet.
$compress_level = 55;
// this will authorize the image
$url_parts = explode( '://', $url );
$scheme = $url_parts[0];
$path = $url_parts[1];
if ( $args['width'] !== 'auto' ) {
$args['width'] = round( $args['width'], 0 );
}
if ( $args['height'] !== 'auto' ) {
$args['height'] = round( $args['height'], 0 );
}
$payload = array(
'path' => $this->urlception_encode( $path ),
'scheme' => $scheme,
'width' => (string) $args['width'],
'height' => (string) $args['height'],
'quality' => (string) $compress_level,
);
ksort( $payload );
$values = array_values( $payload );
$payload = implode( '', $values );
$hash = hash_hmac( 'md5', $payload, $this->cdn_secret );
$new_url = sprintf(
'%s/%s/%s/%s/%s/%s/%s',
$this->cdn_url,
$hash,
(string) $args['width'],
(string) $args['height'],
(string) $compress_level,
$scheme,
$path
);
return $new_url;
}
/**
* Ensures that an url parameter can stand inside an url.
*
* @param string $url The required url.
*
* @return string
*/
protected function urlception_encode( $url ) {
$new_url = rtrim( $url, '/' );
return urlencode( $new_url );
}
/**
* Identify images in post content.
*
* @param string $content The post content which will be filtered.
*
* @return string
*/
public function filter_the_content( $content ) {
$images = self::parse_images_from_html( $content );
if ( empty( $images ) ) {
return $content; // simple. no images
}
$image_sizes = self::image_sizes();
foreach ( $images[0] as $index => $tag ) {
$width = $height = false;
$new_tag = $tag;
$src = $images['img_url'][ $index ];
if ( apply_filters( 'optml_imgcdn_disable_optimization_for_link', false, $src ) ) {
continue;
}
if ( false !== strpos( $src, 'i.optimole.com' ) ) {
continue; // we already have this
}
// we handle only images uploaded to this site.
if ( false === strpos( $src, $this->upload_dir ) ) {
continue;
}
// try to get the declared sizes from the img tag
if ( preg_match( '#width=["|\']?([\d%]+)["|\']?#i', $images['img_tag'][ $index ], $width_string ) ) {
$width = $width_string[1];
}
if ( preg_match( '#height=["|\']?([\d%]+)["|\']?#i', $images['img_tag'][ $index ], $height_string ) ) {
$height = $height_string[1];
}
// Detect WP registered image size from HTML class
if ( preg_match( '#class=["|\']?[^"\']*size-([^"\'\s]+)[^"\']*["|\']?#i', $images['img_tag'][ $index ], $size ) ) {
$size = array_pop( $size );
if ( false === $width && false === $height && 'full' != $size && array_key_exists( $size, $image_sizes ) ) {
$width = (int) $image_sizes[ $size ]['width'];
$height = (int) $image_sizes[ $size ]['height'];
}
} else {
unset( $size );
}
$new_sizes = $this->validate_image_sizes( $width, $height );
$new_url = $this->get_imgcdn_url( $src, $new_sizes );
// replace the url in hrefs or links
if ( ! empty( $images['link_url'][ $index ] ) ) {
if ( $this->check_mimetype( $images['link_url'][ $index ] ) ) {
$new_tag = preg_replace( '#(href=["|\'])' . $images['link_url'][ $index ] . '(["|\'])#i', '\1' . $new_url . '\2', $tag, 1 );
}
}
// replace the new sizes
$new_tag = str_replace( 'width="' . $width . '"', 'width="' . $new_sizes['width'] . '"', $new_tag );
$new_tag = str_replace( 'height="' . $height . '"', 'height="' . $new_sizes['height'] . '"', $new_tag );
// replace the new url
$new_tag = str_replace( 'src="' . $src . '"', 'src="' . $new_url . '"', $new_tag );
$content = str_replace( $tag, $new_tag, $content );
}
return $content;
}
/**
* Match all images and any relevant <a> tags in a block of HTML.
*
* @param string $content Some HTML.
*
* @return array An array of $images matches, where $images[0] is
* an array of full matches, and the link_url, img_tag,
* and img_url keys are arrays of those matches.
*/
protected static function parse_images_from_html( $content ) {
$images = array();
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 ) ) {
foreach ( $images as $key => $unused ) {
// Simplify the output as much as possible, mostly for confirming test results.
if ( is_numeric( $key ) && $key > 0 ) {
unset( $images[ $key ] );
}
}
return $images;
}
return array();
}
/**
* Replace image URLs in the srcset attributes and in case there is a resize in action, also replace the sizes.
*
* @param array $sources Array of image sources.
* @param array $size_array Array of width and height values in pixels (in that order).
* @param array $image_src The 'src' of the image.
* @param array $image_meta The image meta data as returned by 'wp_get_attachment_metadata()'.
* @param int $attachment_id Image attachment ID.
*
* @return array
*/
public function filter_srcset_attr( $sources = array(), $size_array = array(), $image_src = array(), $image_meta = array(), $attachment_id = 0 ) {
if ( ! is_array( $sources ) ) {
return $sources;
}
$used = array();
$new_sources = array();
foreach ( $sources as $i => $source ) {
list( $width, $height ) = self::parse_dimensions_from_filename( $source['url'] );
if ( empty( $width ) ) {
$width = $image_meta['width'];
}
if ( empty( $height ) ) {
$height = $image_meta['height'];
}
$new_sizes = $this->validate_image_sizes( $width, $height );
$new_url = $this->get_imgcdn_url( $source['url'], $new_sizes );
if ( isset( $used[ md5( $new_url ) ] ) ) {
continue;
}
$used[ md5( $new_url ) ] = true;
$new_sources[ $i ] = $sources[ $i ];
$new_sources[ $i ]['url'] = $new_url;
if ( $new_sources[ $i ]['descriptor'] ) {
$new_sources[ $i ]['value'] = $new_sizes['width'];
} else {
$new_sources[ $i ]['value'] = $new_sizes['height'];
}
}
return $sources;
}
/**
* Try to determine height and width from strings WP appends to resized image filenames.
*
* @param string $src The image URL.
*
* @return array An array consisting of width and height.
*/
public static function parse_dimensions_from_filename( $src ) {
$width_height_string = array();
$extensions = array_keys( self::$extensions );
if ( preg_match( '#-(\d+)x(\d+)\.(?:' . implode( '|', $extensions ) . '){1}$#i', $src, $width_height_string ) ) {
$width = (int) $width_height_string[1];
$height = (int) $width_height_string[2];
if ( $width && $height ) {
return array( $width, $height );
}
}
return array( false, false );
}
/**
* Handles the url replacement in options and theme mods.
*/
public function filter_options_and_mods() {
/**
* `optml_imgcdn_options_with_url` is a filter that allows themes or plugins to select which option
* holds an url and needs an optimization.
*/
$theme_slug = get_option( 'stylesheet' );
$options_list = apply_filters(
'optml_imgcdn_options_with_url',
array(
"theme_mods_$theme_slug",
)
);
foreach ( $options_list as $option ) {
add_filter( "option_$option", array( $this, 'replace_option_url' ) );
// this one will not work for theme mods, since get_theme_mod('header_image', $default) has its own default.
// add_filter( "default_option_$option", array( $this, 'replace_option_url' ) );
}
}
/**
* A filter which turns a local url into an optimized CDN image url or an array of image urls.
*
* @param string $url The url which should be replaced.
*
* @return string Replaced url.
*/
public function replace_option_url( $url ) {
if ( empty( $url ) ) {
return $url;
}
// $url might be an array or an json encoded array with urls.
if ( is_array( $url ) || filter_var( $url, FILTER_VALIDATE_URL ) === false ) {
$array = $url;
$encoded = false;
// it might a json encoded array
if ( is_string( $url ) ) {
$array = json_decode( $url, true );
$encoded = true;
}
// in case there is an array, apply it recursively.
if ( is_array( $array ) ) {
foreach ( $array as $index => $value ) {
$array[ $index ] = $this->replace_option_url( $value );
}
if ( $encoded ) {
return json_encode( $array );
} else {
return $array;
}
}
if ( filter_var( $url, FILTER_VALIDATE_URL ) === false ) {
return $url;
}
}
// we handle only images uploaded to this site./
// @TODO this is still wrong, not all the images are coming from the uploads folder.
// if ( false === strpos( $url, $this->upload_dir ) ) {
// return $url;
// }
// get the optimized url.
$new_url = $this->get_imgcdn_url( $url );
return $new_url;
}
/**
* Throw error on object clone
*
* The whole idea of the singleton design pattern is that there is a single
* object therefore, we don't want the object to be cloned.
*
* @access public
* @since 1.0.0
* @return void
*/
public function __clone() {
// Cloning instances of the class is forbidden.
_doing_it_wrong( __FUNCTION__, esc_html__( 'Cheatin’ huh?', 'themeisle-companion' ), '1.0.0' );
}
/**
* Disable unserializing of the class
*
* @access public
* @since 1.0.0
* @return void
*/
public function __wakeup() {
// Unserializing instances of the class is forbidden.
_doing_it_wrong( __FUNCTION__, esc_html__( 'Cheatin’ huh?', 'themeisle-companion' ), '1.0.0' );
}
}