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<?php
/**
* WPSEO Premium plugin file.
*
* @package WPSEO\Premium
*/
/**
* Initializer for the social previews.
*/
class WPSEO_Social_Previews implements WPSEO_WordPress_Integration {
/**
* Registers the hooks.
*
* @codeCoverageIgnore Method uses dependencies.
*
* @return void
*/
public function register_hooks() {
add_action( 'wp_ajax_retrieve_image_data_from_url', [ $this, 'ajax_retrieve_image_data_from_url' ] );
add_action( 'admin_enqueue_scripts', [ $this, 'enqueue_assets' ] );
}
/**
* Enqueues the javascript and css files needed for the social previews.
*
* @codeCoverageIgnore Method uses dependencies.
*
* @return void
*/
public function enqueue_assets() {
wp_enqueue_style( 'yoast-social-preview-css' );
wp_enqueue_style( 'yoast-premium-social-preview' );
wp_enqueue_script( 'yoast-social-preview' );
wp_localize_script( 'yoast-social-preview', 'yoastSocialPreview', $this->localize() );
}
/**
* Retrieves image data from an image URL.
*/
public function ajax_retrieve_image_data_from_url() {
$url = filter_input( INPUT_GET, 'imageURL', FILTER_SANITIZE_URL );
if ( check_ajax_referer( 'retrieve_image_data_from_url', false, false ) === false ) {
wp_send_json(
[
'status' => 'forbidden',
'result' => $url,
],
403
);
}
$attachment_id = $this->retrieve_image_id_from_url( $url );
if ( $attachment_id ) {
$image = wp_get_attachment_image_src( $attachment_id, 'full' );
$result = [
'status' => 'success',
'result' => $image[0],
];
}
else {
// Pass the original URL for consistency.
$result = [
'status' => 'success',
'result' => $url,
];
}
wp_send_json( $result );
}
/**
* Determines an attachment ID from a URL which might be an attachment URL.
*
* @link https://philipnewcomer.net/2012/11/get-the-attachment-id-from-an-image-url-in-wordpress/
*
* @param string $url The URL to retrieve the attachment ID for.
*
* @return bool|int The attachment ID or false.
*/
public function retrieve_image_id_from_url( $url ) {
global $wpdb;
$attachment_id = false;
// Get the upload directory paths.
$upload_dir_paths = wp_upload_dir();
// Make sure the upload path base directory exists in the attachment URL, to verify that we're working with a media library image.
if ( strpos( $url, $upload_dir_paths['baseurl'] ) !== false ) {
// If this is the URL of an auto-generated thumbnail, get the URL of the original image.
$url = preg_replace( '/-\d+x\d+(?=\.(jpg|jpeg|png|gif)$)/i', '', $url );
// Remove the upload path base directory from the attachment URL.
$url = str_replace( $upload_dir_paths['baseurl'] . '/', '', $url );
// Finally, run a custom database query to get the attachment ID from the modified attachment URL.
$attachment_id = $wpdb->get_var(
$wpdb->prepare(
"SELECT wposts.ID
FROM {$wpdb->posts} AS wposts,
{$wpdb->postmeta} AS wpostmeta
WHERE wposts.ID = wpostmeta.post_id
AND wpostmeta.meta_key = '_wp_attached_file'
AND wpostmeta.meta_value = %s
AND wposts.post_type = 'attachment'",
$url
)
);
}
return (int) $attachment_id;
}
/**
* Returns the translations.
*
* @return array
*/
private function localize() {
if ( empty( WPSEO_Meta::$meta_fields['social']['opengraph-title']['description'] ) ) {
WPSEO_Social_Admin::translate_meta_boxes();
}
$social = WPSEO_Meta::$meta_fields['social'];
return [
'website' => $this->get_website(),
'uploadImage' => __( 'Upload image', 'wordpress-seo-premium' ),
'useOtherImage' => __( 'Use other image', 'wordpress-seo-premium' ),
'removeImageButton' => __( 'Remove image', 'wordpress-seo-premium' ),
'facebookDefaultImage' => WPSEO_Options::get( 'og_default_image' ),
'i18n' => [
'help' => $this->get_help_translations( $social ),
'helpButton' => [
'facebookTitle' => __( 'Show information about Facebook title', 'wordpress-seo-premium' ),
'facebookDescription' => __( 'Show information about Facebook description', 'wordpress-seo-premium' ),
'facebookImage' => __( 'Show information about Facebook image', 'wordpress-seo-premium' ),
'twitterTitle' => __( 'Show information about Twitter title', 'wordpress-seo-premium' ),
'twitterDescription' => __( 'Show information about Twitter description', 'wordpress-seo-premium' ),
'twitterImage' => __( 'Show information about Twitter image', 'wordpress-seo-premium' ),
],
'library' => $this->get_translations(),
],
'facebookNonce' => wp_create_nonce( 'get_facebook_name' ),
'imageDataNonce' => wp_create_nonce( 'retrieve_image_data_from_url' ),
];
}
/**
* Gets the help translations.
*
* @param array $social_field The social fields that are available.
*
* @return array Translations to be used in the social previews.
*/
private function get_help_translations( $social_field ) {
// Default everything to empty strings.
$localized = [];
if ( isset( $social_field['opengraph-title'] ) ) {
$localized['facebookTitle'] = $social_field['opengraph-title']['description'];
$localized['facebookDescription'] = $social_field['opengraph-description']['description'];
$localized['facebookImage'] = $social_field['opengraph-image']['description'];
}
if ( isset( $social_field['twitter-title'] ) ) {
$localized['twitterTitle'] = $social_field['twitter-title']['description'];
$localized['twitterDescription'] = $social_field['twitter-description']['description'];
$localized['twitterImage'] = $social_field['twitter-image']['description'];
}
return $localized;
}
/**
* Get the website hostname.
*
* @return string
*/
private function get_website() {
// We only want the host part of the URL.
$website = wp_parse_url( home_url(), PHP_URL_HOST );
$website = trim( $website, '/' );
$website = strtolower( $website );
return $website;
}
/**
* Returns Jed compatible YoastSEO.js translations.
*
* @return array
*/
private function get_translations() {
$file = plugin_dir_path( WPSEO_FILE ) . 'premium/languages/yoast-social-previews-' . WPSEO_Language_Utils::get_user_locale() . '.json';
if ( file_exists( $file ) ) {
$file = file_get_contents( $file );
if ( $file !== false ) {
return json_decode( $file, true );
}
}
return [];
}
/**
* Enqueues the assets.
*
* @deprecated 9.4
* @codeCoverageIgnore
*
* @return void
*/
public function set_hooks() {
_deprecated_function( 'WPSEO_Social_Previews::set_hooks', '9.4', 'WPSEO_Social_Previews::register_hooks' );
}
/**
* Sets the hooks necessary for AJAX.
*
* @deprecated 9.4
* @codeCoverageIgnore
*
* @return void
*/
public function set_ajax_hooks() {
_deprecated_function( 'WPSEO_Social_Previews::set_ajax_hooks', '9.4' );
}
/**
* Register the required assets.
*
* @deprecated 9.4
* @codeCoverageIgnore
*
* @return void
*/
public function register_assets() {
_deprecated_function( 'WPSEO_Social_Previews::set_ajax_hooks', '9.4' );
}
}