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<?php /** * WPSEO plugin file. * * @package WPSEO / /* * WPSEO_Image_Utils. / class WPSEO_Image_Utils { /* * Find an attachment ID for a given URL. * * @param string $url The URL to find the attachment for. * * @return int The found attachment ID, or 0 if none was found. / public static function get_attachment_by_url( $url ) { / * As get_attachment_by_url won't work on resized versions of images, * we strip out the size part of an image URL. / $url = preg_replace( '/(.)-\d+x\d+\.(jpg\|png\|gif)$/', '$1.$2', $url ); static $uploads; if ( $uploads === null ) { $uploads = wp_get_upload_dir(); } // Don't try to do this for external URLs. if ( strpos( $url, $uploads['baseurl'] ) !== 0 ) { return 0; } if ( function_exists( 'wpcom_vip_attachment_url_to_postid' ) ) { // @codeCoverageIgnoreStart -- We can't test this properly. return (int) wpcom_vip_attachment_url_to_postid( $url ); // @codeCoverageIgnoreEnd -- The rest we _can_ test. } return self::attachment_url_to_postid( $url ); } /** * Implements the attachment_url_to_postid with use of WP Cache. * * @param string $url The attachment URL for which we want to know the Post ID. * * @return int The Post ID belonging to the attachment, 0 if not found. / protected static function attachment_url_to_postid( $url ) { $cache_key = sprintf( 'yoast_attachment_url_post_id_%s', md5( $url ) ); // Set the ID based on the hashed URL in the cache. $id = wp_cache_get( $cache_key ); if ( $id === 'not_found' ) { return 0; } // ID is found in cache, return. if ( $id !== false ) { return $id; } // Note: We use the WP COM version if we can, see above. $id = attachment_url_to_postid( $url ); if ( empty( $id ) ) { wp_cache_set( $cache_key, 'not_found', '', ( 12 HOUR_IN_SECONDS + wp_rand( 0, ( 4 * HOUR_IN_SECONDS ) ) ) ); return 0; } // We have the Post ID, but it's not in the cache yet. We do that here and return. wp_cache_set( $cache_key, $id, '', ( 24 * HOUR_IN_SECONDS + wp_rand( 0, ( 12 * HOUR_IN_SECONDS ) ) ) ); return $id; } /** * Retrieves the image data. * * @param array $image Image array with URL and metadata. * @param int $attachment_id Attachment ID. * * @return false\|array { * Array of image data * * @type string $alt Image's alt text. * @type string $path Path of image. * @type int $width Width of image. * @type int $height Height of image. * @type string $type Image's MIME type. * @type string $size Image's size. * @type string $url Image's URL. * @type int $filesize The file size in bytes, if already set. * } / public static function get_data( $image, $attachment_id ) { if ( ! is_array( $image ) ) { return false; } // Deals with non-set keys and values being null or false. if ( empty( $image['width'] ) \|\| empty( $image['height'] ) ) { return false; } $image['id'] = $attachment_id; $image['alt'] = self::get_alt_tag( $attachment_id ); $image['pixels'] = ( (int) $image['width'] (int) $image['height'] ); if ( ! isset( $image['type'] ) ) { $image['type'] = get_post_mime_type( $attachment_id ); } /** * Filter: 'wpseo_image_data' - Filter image data. * * Elements with keys not listed in the section will be discarded. * * @api array { * Array of image data * * @type int id Image's ID as an attachment. * @type string alt Image's alt text. * @type string path Image's path. * @type int width Width of image. * @type int height Height of image. * @type int pixels Number of pixels in the image. * @type string type Image's MIME type. * @type string size Image's size. * @type string url Image's URL. * @type int filesize The file size in bytes, if already set. * } * @api int Attachment ID. / $image = apply_filters( 'wpseo_image_data', $image, $attachment_id ); // Keep only the keys we need, and nothing else. return array_intersect_key( $image, array_flip( [ 'id', 'alt', 'path', 'width', 'height', 'pixels', 'type', 'size', 'url', 'filesize' ] ) ); } /* * Checks a size version of an image to see if it's not too heavy. * * @param array $image Image to check the file size of. * * @return bool True when the image is within limits, false if not. / public static function has_usable_file_size( $image ) { if ( ! is_array( $image ) \|\| $image === [] ) { return false; } /* * Filter: 'wpseo_image_image_weight_limit' - Determines what the maximum weight * (in bytes) of an image is allowed to be, default is 2 MB. * * @api int - The maximum weight (in bytes) of an image. / $max_size = apply_filters( 'wpseo_image_image_weight_limit', 2097152 ); // We cannot check without a path, so assume it's fine. if ( ! isset( $image['path'] ) ) { return true; } return ( self::get_file_size( $image ) <= $max_size ); } /* * Find the right version of an image based on size. * * @param int $attachment_id Attachment ID. * @param string $size Size name. * * @return array\|false Returns an array with image data on success, false on failure. / public static function get_image( $attachment_id, $size ) { $image = false; if ( $size === 'full' ) { $image = self::get_full_size_image_data( $attachment_id ); } if ( ! $image ) { $image = image_get_intermediate_size( $attachment_id, $size ); } if ( ! $image ) { return false; } $image['size'] = $size; return self::get_data( $image, $attachment_id ); } /* * Returns the image data for the full size image. * * @param int $attachment_id Attachment ID. * * @return array\|false Array when there is a full size image. False if not. / protected static function get_full_size_image_data( $attachment_id ) { $image = wp_get_attachment_metadata( $attachment_id ); if ( ! is_array( $image ) ) { return false; } $image['url'] = wp_get_attachment_image_url( $attachment_id, 'full' ); $image['path'] = get_attached_file( $attachment_id ); $image['size'] = 'full'; return $image; } /* * Finds the full file path for a given image file. * * @param string $path The relative file path. * * @return string The full file path. / public static function get_absolute_path( $path ) { static $uploads; if ( $uploads === null ) { $uploads = wp_get_upload_dir(); } // Add the uploads basedir if the path does not start with it. if ( empty( $uploads['error'] ) && strpos( $path, $uploads['basedir'] ) !== 0 ) { return $uploads['basedir'] . DIRECTORY_SEPARATOR . ltrim( $path, DIRECTORY_SEPARATOR ); } return $path; } /* * Get the relative path of the image. * * @param string $img Image URL. * * @return string The expanded image URL. / public static function get_relative_path( $img ) { if ( $img[0] !== '/' ) { return $img; } // If it's a relative URL, it's relative to the domain, not necessarily to the WordPress install, we // want to preserve domain name and URL scheme (http / https) though. $parsed_url = wp_parse_url( home_url() ); $img = $parsed_url['scheme'] . '://' . $parsed_url['host'] . $img; return $img; } /* * Get the image file size. * * @param array $image An image array object. * * @return int The file size in bytes. / public static function get_file_size( $image ) { if ( isset( $image['filesize'] ) ) { return $image['filesize']; } if ( ! isset( $image['path'] ) ) { return 0; } // If the file size for the file is over our limit, we're going to go for a smaller version. if ( function_exists( 'wp_filesize' ) ) { return wp_filesize( self::get_absolute_path( $image['path'] ) ); } return file_exists( $image['path'] ) ? (int) filesize( $image['path'] ) : 0; } /* * Returns the different image variations for consideration. * * @param int $attachment_id The attachment to return the variations for. * * @return array The different variations possible for this attachment ID. / public static function get_variations( $attachment_id ) { $variations = []; foreach ( self::get_sizes() as $size ) { $variation = self::get_image( $attachment_id, $size ); // The get_image function returns false if the size doesn't exist for this attachment. if ( $variation ) { $variations[] = $variation; } } return $variations; } /* * Check original size of image. If original image is too small, return false, else return true. * * Filters a list of variations by a certain set of usable dimensions. * * @param array $usable_dimensions { * The parameters to check against. * * @type int $min_width Minimum width of image. * @type int $max_width Maximum width of image. * @type int $min_height Minimum height of image. * @type int $max_height Maximum height of image. * } * @param array $variations The variations that should be considered. * * @return array Whether a variation is fit for display or not. / public static function filter_usable_dimensions( $usable_dimensions, $variations ) { $filtered = []; foreach ( $variations as $variation ) { $dimensions = $variation; if ( self::has_usable_dimensions( $dimensions, $usable_dimensions ) ) { $filtered[] = $variation; } } return $filtered; } /* * Filters a list of variations by (disk) file size. * * @param array $variations The variations to consider. * * @return array The validations that pass the required file size limits. / public static function filter_usable_file_size( $variations ) { foreach ( $variations as $variation ) { // We return early to prevent measuring the file size of all the variations. if ( self::has_usable_file_size( $variation ) ) { return [ $variation ]; } } return []; } /* * Retrieve the internal WP image file sizes. * * @return array An array of image sizes. / public static function get_sizes() { /* * Filter: 'wpseo_image_sizes' - Determines which image sizes we'll loop through to get an appropriate image. * * @api array - The array of image sizes to loop through. / return apply_filters( 'wpseo_image_sizes', [ 'full', 'large', 'medium_large' ] ); } /* * Grabs an image alt text. * * @param int $attachment_id The attachment ID. * * @return string The image alt text. / public static function get_alt_tag( $attachment_id ) { return (string) get_post_meta( $attachment_id, '_wp_attachment_image_alt', true ); } /* * Checks whether an img sizes up to the parameters. * * @param array $dimensions The image values. * @param array $usable_dimensions The parameters to check against. * * @return bool True if the image has usable measurements, false if not. / private static function has_usable_dimensions( $dimensions, $usable_dimensions ) { foreach ( [ 'width', 'height' ] as $param ) { $minimum = $usable_dimensions[ 'min_' . $param ]; $maximum = $usable_dimensions[ 'max_' . $param ]; $current = $dimensions[ $param ]; if ( ( $current < $minimum ) \|\| ( $current > $maximum ) ) { return false; } } return true; } /* * Gets the post's first usable content image. Null if none is available. * * @param int\|null $post_id The post id. * * @return string\|null The image URL. / public static function get_first_usable_content_image_for_post( $post_id = null ) { $post = get_post( $post_id ); // We know get_post() returns the post or null. if ( ! $post ) { return null; } $image_finder = new WPSEO_Content_Images(); $images = $image_finder->get_images( $post->ID, $post ); return self::get_first_image( $images ); } /* * Gets the term's first usable content image. Null if none is available. * * @param int $term_id The term id. * * @return string\|null The image URL. / public static function get_first_content_image_for_term( $term_id ) { $term_description = term_description( $term_id ); // We know term_description() returns a string which may be empty. if ( $term_description === '' ) { return null; } $image_finder = new WPSEO_Content_Images(); $images = $image_finder->get_images_from_content( $term_description ); return self::get_first_image( $images ); } /* * Retrieves an attachment ID for an image uploaded in the settings. * * Due to self::get_attachment_by_url returning 0 instead of false. * 0 is also a possibility when no ID is available. * * @param string $setting The setting the image is stored in. * * @return int\|bool The attachment id, or false or 0 if no ID is available. / public static function get_attachment_id_from_settings( $setting ) { $image_id = WPSEO_Options::get( $setting . '_id', false ); if ( ! $image_id ) { $image = WPSEO_Options::get( $setting, false ); if ( $image ) { // There is not an option to put a URL in an image field in the settings anymore, only to upload it through the media manager. // This means an attachment always exists, so doing this is only needed once. $image_id = self::get_attachment_by_url( $image ); WPSEO_Options::set( $setting . '_id', $image_id ); } } return $image_id; } /* * Retrieves the first possible image url from an array of images. * * @param array $images The array to extract image url from. * * @return string\|null The extracted image url when found, null when not found. */ protected static function get_first_image( $images ) { if ( ! is_array( $images ) ) { return null; } $images = array_filter( $images ); if ( empty( $images ) ) { return null; } return reset( $images ); } }

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