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<?php namespace Yoast\WP\SEO\Helpers; use WPSEO_Image_Utils; use Yoast\WP\SEO\Models\SEO_Links; use Yoast\WP\SEO\Repositories\Indexable_Repository; use Yoast\WP\SEO\Repositories\SEO_Links_Repository; /** * A helper object for images. */ class Image_Helper { /** * Image types that are supported by Open Graph. * * @var array */ protected static $valid_image_types = [ 'image/jpeg', 'image/gif', 'image/png', 'image/webp' ]; /** * Image extensions that are supported by Open Graph. * * @var array */ protected static $valid_image_extensions = [ 'jpeg', 'jpg', 'gif', 'png', 'webp' ]; /** * Represents the indexables repository. * * @var Indexable_Repository */ protected $indexable_repository; /** * Represents the SEO Links repository. * * @var SEO_Links_Repository */ protected $seo_links_repository; /** * The options helper. * * @var Options_Helper */ private $options_helper; /** * The URL helper. * * @var Url_Helper */ private $url_helper; /** * Image_Helper constructor. * * @param Indexable_Repository $indexable_repository The indexable repository. * @param SEO_Links_Repository $seo_links_repository The SEO Links repository. * @param Options_Helper $options The options helper. * @param Url_Helper $url_helper The URL helper. */ public function __construct( Indexable_Repository $indexable_repository, SEO_Links_Repository $seo_links_repository, Options_Helper $options, Url_Helper $url_helper ) { $this->indexable_repository = $indexable_repository; $this->seo_links_repository = $seo_links_repository; $this->options_helper = $options; $this->url_helper = $url_helper; } /** * Determines whether or not the wanted attachment is considered valid. * * @param int $attachment_id The attachment ID to get the attachment by. * * @return bool Whether or not the attachment is valid. */ public function is_valid_attachment( $attachment_id ) { if ( ! \wp_attachment_is_image( $attachment_id ) ) { return false; } $post_mime_type = \get_post_mime_type( $attachment_id ); if ( $post_mime_type === false ) { return false; } return $this->is_valid_image_type( $post_mime_type ); } /** * Checks if the given extension is a valid extension * * @param string $image_extension The image extension. * * @return bool True when valid. */ public function is_extension_valid( $image_extension ) { return \in_array( $image_extension, static::$valid_image_extensions, true ); } /** * Determines whether the passed mime type is a valid image type. * * @param string $mime_type The detected mime type. * * @return bool Whether or not the attachment is a valid image type. */ public function is_valid_image_type( $mime_type ) { return \in_array( $mime_type, static::$valid_image_types, true ); } /** * Retrieves the image source for an attachment. * * @param int $attachment_id The attachment. * @param string $image_size The image size to retrieve. * * @return string The image url or an empty string when not found. */ public function get_attachment_image_source( $attachment_id, $image_size = 'full' ) { $attachment = \wp_get_attachment_image_src( $attachment_id, $image_size ); if ( ! $attachment ) { return ''; } return $attachment[0]; } /** * Retrieves the ID of the featured image. * * @param int $post_id The post id to get featured image id for. * * @return int|bool ID when found, false when not. */ public function get_featured_image_id( $post_id ) { if ( ! \has_post_thumbnail( $post_id ) ) { return false; } return \get_post_thumbnail_id( $post_id ); } /** * Gets the image url from the content. * * @param int $post_id The post id to extract the images from. * * @return string The image url or an empty string when not found. */ public function get_post_content_image( $post_id ) { $image_url = $this->get_first_usable_content_image_for_post( $post_id ); if ( $image_url === null ) { return ''; } return $image_url; } /** * Gets the first image url of a gallery. * * @param int $post_id Post ID to use. * * @return string The image url or an empty string when not found. */ public function get_gallery_image( $post_id ) { $post = \get_post( $post_id ); if ( \strpos( $post->post_content, '[gallery' ) === false ) { return ''; } $images = \get_post_gallery_images( $post ); if ( empty( $images ) ) { return ''; } return \reset( $images ); } /** * Gets the image url from the term content. * * @param int $term_id The term id to extract the images from. * * @return string The image url or an empty string when not found. */ public function get_term_content_image( $term_id ) { $image_url = $this->get_first_content_image_for_term( $term_id ); if ( $image_url === null ) { return ''; } return $image_url; } /** * Retrieves the caption for an attachment. * * @param int $attachment_id Attachment ID. * * @return string The caption when found, empty string when no caption is found. */ public function get_caption( $attachment_id ) { $caption = \wp_get_attachment_caption( $attachment_id ); if ( ! empty( $caption ) ) { return $caption; } $caption = \get_post_meta( $attachment_id, '_wp_attachment_image_alt', true ); if ( ! empty( $caption ) ) { return $caption; } return ''; } /** * Retrieves the attachment metadata. * * @param int $attachment_id Attachment ID. * * @return array The metadata, empty array when no metadata is found. */ public function get_metadata( $attachment_id ) { $metadata = \wp_get_attachment_metadata( $attachment_id ); if ( ! $metadata || ! \is_array( $metadata ) ) { return []; } return $metadata; } /** * Retrieves the attachment image url. * * @param int $attachment_id Attachment ID. * @param string $size The size to get. * * @return string The url when found, empty string otherwise. */ public function get_attachment_image_url( $attachment_id, $size ) { $url = \wp_get_attachment_image_url( $attachment_id, $size ); if ( ! $url ) { return ''; } return $url; } /** * Find the right version of an image based on size. * * @codeCoverageIgnore - We have to write test when this method contains own code. * * @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 function get_image( $attachment_id, $size ) { return WPSEO_Image_Utils::get_image( $attachment_id, $size ); } /** * Retrieves the best attachment variation for the given attachment. * * @codeCoverageIgnore - We have to write test when this method contains own code. * * @param int $attachment_id The attachment id. * * @return bool|string The attachment url or false when no variations found. */ public function get_best_attachment_variation( $attachment_id ) { $variations = WPSEO_Image_Utils::get_variations( $attachment_id ); $variations = WPSEO_Image_Utils::filter_usable_file_size( $variations ); // If we are left without variations, there is no valid variation for this attachment. if ( empty( $variations ) ) { return false; } // The variations are ordered so the first variations is by definition the best one. return \reset( $variations ); } /** * Find an attachment ID for a given URL. * * @param string $url The URL to find the attachment for. * @param bool $use_link_table Whether the SEO Links table will be used to retrieve the id. * * @return int The found attachment ID, or 0 if none was found. */ public function get_attachment_by_url( $url, $use_link_table = true ) { // Don't try to do this for external URLs. $parsed_url = \wp_parse_url( $url ); if ( $this->url_helper->get_link_type( $parsed_url ) === SEO_Links::TYPE_EXTERNAL ) { return 0; } /** The `wpseo_force_creating_and_using_attachment_indexables` filter is documented in indexable-link-builder.php */ if ( ! $this->options_helper->get( 'disable-attachment' ) || \apply_filters( 'wpseo_force_creating_and_using_attachment_indexables', false ) ) { // Strip out the size part of an image URL. $url = \preg_replace( '/(.*)-\d+x\d+\.(jpeg|jpg|png|gif)$/', '$1.$2', $url ); $indexable = $this->indexable_repository->find_by_permalink( $url ); if ( $indexable && $indexable->object_type === 'post' && $indexable->object_sub_type === 'attachment' ) { return $indexable->object_id; } $post_id = WPSEO_Image_Utils::get_attachment_by_url( $url ); if ( $post_id !== 0 ) { // Find the indexable, this triggers creating it so it can be found next time. $this->indexable_repository->find_by_id_and_type( $post_id, 'post' ); } return $post_id; } if ( ! $use_link_table ) { return WPSEO_Image_Utils::get_attachment_by_url( $url ); } $cache_key = 'attachment_seo_link_object_' . \md5( $url ); $found = false; $link = \wp_cache_get( $cache_key, 'yoast-seo-attachment-link', false, $found ); if ( $found === false ) { $link = $this->seo_links_repository->find_one_by_url( $url ); \wp_cache_set( $cache_key, $link, 'yoast-seo-attachment-link', \MINUTE_IN_SECONDS ); } if ( ! \is_a( $link, SEO_Links::class ) ) { return WPSEO_Image_Utils::get_attachment_by_url( $url ); } return $link->target_post_id; } /** * 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. * * @codeCoverageIgnore - We have to write test when this method contains own code. * * @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 function get_attachment_id_from_settings( $setting ) { return WPSEO_Image_Utils::get_attachment_id_from_settings( $setting ); } /** * Based on and image ID return array with the best variation of that image. If it's not saved to the DB, save it * to an option. * * @param string $setting The setting name. Should be company or person. * * @return array|bool Array with image details when the image is found, boolean when it's not found. */ public function get_attachment_meta_from_settings( $setting ) { $image_meta = $this->options_helper->get( $setting . '_meta', false ); if ( ! $image_meta ) { $image_id = $this->options_helper->get( $setting . '_id', false ); if ( $image_id ) { // 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_meta = $this->get_best_attachment_variation( $image_id ); if ( $image_meta ) { $this->options_helper->set( $setting . '_meta', $image_meta ); } } } return $image_meta; } /** * Retrieves the first usable content image for a post. * * @codeCoverageIgnore - We have to write test when this method contains own code. * * @param int $post_id The post id to extract the images from. * * @return string|null */ protected function get_first_usable_content_image_for_post( $post_id ) { return WPSEO_Image_Utils::get_first_usable_content_image_for_post( $post_id ); } /** * Gets the term's first usable content image. Null if none is available. * * @codeCoverageIgnore - We have to write test when this method contains own code. * * @param int $term_id The term id. * * @return string|null The image URL. */ protected function get_first_content_image_for_term( $term_id ) { return WPSEO_Image_Utils::get_first_content_image_for_term( $term_id ); } }
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