mirror of
https://git.sindominio.net/estibadores/wordpress.git
synced 2024-11-14 23:21:07 +01:00
269 lines
10 KiB
PHP
269 lines
10 KiB
PHP
<?php
|
|
|
|
/*
|
|
* Twitter Cards
|
|
*
|
|
* Hooks onto the Open Graph protocol and extends it by adding only the tags
|
|
* we need for twitter cards.
|
|
*
|
|
* @see /wp-content/blog-plugins/open-graph.php
|
|
* @see https://dev.twitter.com/cards/overview
|
|
*/
|
|
class Jetpack_Twitter_Cards {
|
|
|
|
static function twitter_cards_tags( $og_tags ) {
|
|
global $post;
|
|
|
|
/**
|
|
* Maximum alt text length.
|
|
*
|
|
* @see https://developer.twitter.com/en/docs/tweets/optimize-with-cards/overview/summary-card-with-large-image.html
|
|
*/
|
|
$alt_length = 420;
|
|
|
|
if ( post_password_required() ) {
|
|
return $og_tags;
|
|
}
|
|
|
|
/** This action is documented in class.jetpack.php */
|
|
if ( apply_filters( 'jetpack_disable_twitter_cards', false ) ) {
|
|
return $og_tags;
|
|
}
|
|
|
|
/*
|
|
* These tags apply to any page (home, archives, etc)
|
|
*/
|
|
|
|
// If we have information on the author/creator, then include that as well
|
|
if ( ! empty( $post ) && ! empty( $post->post_author ) ) {
|
|
/** This action is documented in modules/sharedaddy/sharing-sources.php */
|
|
$handle = apply_filters( 'jetpack_sharing_twitter_via', '', $post->ID );
|
|
if ( ! empty( $handle ) && ! self::is_default_site_tag( $handle ) ) {
|
|
$og_tags['twitter:creator'] = self::sanitize_twitter_user( $handle );
|
|
}
|
|
}
|
|
|
|
$site_tag = self::site_tag();
|
|
/** This action is documented in modules/sharedaddy/sharing-sources.php */
|
|
$site_tag = apply_filters( 'jetpack_sharing_twitter_via', $site_tag, ( is_singular() ? $post->ID : null ) );
|
|
/** This action is documented in modules/sharedaddy/sharing-sources.php */
|
|
$site_tag = apply_filters( 'jetpack_twitter_cards_site_tag', $site_tag, $og_tags );
|
|
if ( ! empty( $site_tag ) ) {
|
|
$og_tags['twitter:site'] = self::sanitize_twitter_user( $site_tag );
|
|
}
|
|
|
|
if ( ! is_singular() || ! empty( $og_tags['twitter:card'] ) ) {
|
|
/**
|
|
* Filter the default Twitter card image, used when no image can be found in a post.
|
|
*
|
|
* @module sharedaddy, publicize
|
|
*
|
|
* @since 5.9.0
|
|
*
|
|
* @param string $str Default image URL.
|
|
*/
|
|
$image = apply_filters( 'jetpack_twitter_cards_image_default', '' );
|
|
if ( ! empty( $image ) ) {
|
|
$og_tags['twitter:image'] = $image;
|
|
}
|
|
|
|
return $og_tags;
|
|
}
|
|
|
|
$the_title = get_the_title();
|
|
if ( ! $the_title ) {
|
|
$the_title = get_bloginfo( 'name' );
|
|
}
|
|
$og_tags['twitter:text:title'] = $the_title;
|
|
|
|
/*
|
|
* The following tags only apply to single pages.
|
|
*/
|
|
|
|
$card_type = 'summary';
|
|
|
|
// Try to give priority to featured images
|
|
if ( class_exists( 'Jetpack_PostImages' ) ) {
|
|
$featured = Jetpack_PostImages::from_thumbnail( $post->ID, 240, 240 );
|
|
if ( ! empty( $featured ) && count( $featured ) > 0 ) {
|
|
if ( (int) $featured[0]['src_width'] >= 280 && (int) $featured[0]['src_height'] >= 150 ) {
|
|
$card_type = 'summary_large_image';
|
|
$og_tags['twitter:image'] = esc_url( add_query_arg( 'w', 640, $featured[0]['src'] ) );
|
|
} else {
|
|
$og_tags['twitter:image'] = esc_url( add_query_arg( 'w', 240, $featured[0]['src'] ) );
|
|
}
|
|
|
|
// Add the alt tag if we have one.
|
|
if ( ! empty( $featured[0]['alt_text'] ) ) {
|
|
// Shorten it if it is too long.
|
|
if ( strlen( $featured[0]['alt_text'] ) > $alt_length ) {
|
|
$og_tags['twitter:image:alt'] = esc_attr( mb_substr( $featured[0]['alt_text'], 0, $alt_length ) . '…' );
|
|
} else {
|
|
$og_tags['twitter:image:alt'] = esc_attr( $featured[0]['alt_text'] );
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Only proceed with media analysis if a featured image has not superseded it already.
|
|
if ( empty( $og_tags['twitter:image'] ) && empty( $og_tags['twitter:image:src'] ) ) {
|
|
if ( ! class_exists( 'Jetpack_Media_Summary' ) && defined( 'IS_WPCOM' ) && IS_WPCOM ) {
|
|
include WP_CONTENT_DIR . '/lib/class.wpcom-media-summary.php';
|
|
}
|
|
|
|
if ( ! class_exists( 'Jetpack_Media_Summary' ) ) {
|
|
jetpack_require_lib( 'class.media-summary' );
|
|
}
|
|
|
|
// Test again, class should already be auto-loaded in Jetpack.
|
|
// If not, skip extra media analysis and stick with a summary card
|
|
if ( class_exists( 'Jetpack_Media_Summary' ) ) {
|
|
$extract = Jetpack_Media_Summary::get( $post->ID );
|
|
|
|
if ( 'gallery' == $extract['type'] ) {
|
|
list( $og_tags, $card_type ) = self::twitter_cards_define_type_based_on_image_count( $og_tags, $extract );
|
|
} elseif ( 'video' == $extract['type'] ) {
|
|
// Leave as summary, but with large pict of poster frame (we know those comply to Twitter's size requirements)
|
|
$card_type = 'summary_large_image';
|
|
$og_tags['twitter:image'] = esc_url( add_query_arg( 'w', 640, $extract['image'] ) );
|
|
} else {
|
|
list( $og_tags, $card_type ) = self::twitter_cards_define_type_based_on_image_count( $og_tags, $extract );
|
|
}
|
|
}
|
|
}
|
|
|
|
$og_tags['twitter:card'] = $card_type;
|
|
|
|
// Make sure we have a description for Twitter, their validator isn't happy without some content (single space not valid).
|
|
if ( ! isset( $og_tags['og:description'] ) || '' == trim( $og_tags['og:description'] ) || __( 'Visit the post for more.', 'jetpack' ) == $og_tags['og:description'] ) { // empty( trim( $og_tags['og:description'] ) ) isn't valid php
|
|
$has_creator = ( ! empty( $og_tags['twitter:creator'] ) && '@wordpressdotcom' != $og_tags['twitter:creator'] ) ? true : false;
|
|
if ( ! empty( $extract ) && 'video' == $extract['type'] ) { // use $extract['type'] since $card_type is 'summary' for video posts
|
|
/* translators: %s is the post author */
|
|
$og_tags['twitter:description'] = ( $has_creator ) ? sprintf( __( 'Video post by %s.', 'jetpack' ), $og_tags['twitter:creator'] ) : __( 'Video post.', 'jetpack' );
|
|
} else {
|
|
/* translators: %s is the post author */
|
|
$og_tags['twitter:description'] = ( $has_creator ) ? sprintf( __( 'Post by %s.', 'jetpack' ), $og_tags['twitter:creator'] ) : __( 'Visit the post for more.', 'jetpack' );
|
|
}
|
|
}
|
|
|
|
if ( empty( $og_tags['twitter:image'] ) && empty( $og_tags['twitter:image:src'] ) ) {
|
|
/** This action is documented in class.jetpack-twitter-cards.php */
|
|
$image = apply_filters( 'jetpack_twitter_cards_image_default', '' );
|
|
if ( ! empty( $image ) ) {
|
|
$og_tags['twitter:image'] = $image;
|
|
}
|
|
}
|
|
|
|
return $og_tags;
|
|
}
|
|
|
|
static function sanitize_twitter_user( $str ) {
|
|
return '@' . preg_replace( '/^@/', '', $str );
|
|
}
|
|
|
|
static function is_default_site_tag( $site_tag ) {
|
|
return in_array( $site_tag, array( '@wordpressdotcom', '@jetpack', 'wordpressdotcom', 'jetpack' ) );
|
|
}
|
|
|
|
static function prioritize_creator_over_default_site( $site_tag, $og_tags = array() ) {
|
|
if ( ! empty( $og_tags['twitter:creator'] ) && self::is_default_site_tag( $site_tag ) ) {
|
|
return $og_tags['twitter:creator'];
|
|
}
|
|
return $site_tag;
|
|
}
|
|
|
|
static function twitter_cards_define_type_based_on_image_count( $og_tags, $extract ) {
|
|
$card_type = 'summary';
|
|
$img_count = $extract['count']['image'];
|
|
|
|
if ( empty( $img_count ) ) {
|
|
|
|
// No images, use Blavatar as a thumbnail for the summary type.
|
|
if ( function_exists( 'blavatar_domain' ) ) {
|
|
$blavatar_domain = blavatar_domain( site_url() );
|
|
if ( blavatar_exists( $blavatar_domain ) ) {
|
|
$og_tags['twitter:image'] = blavatar_url( $blavatar_domain, 'img', 240 );
|
|
}
|
|
}
|
|
|
|
// Second fall back, Site Logo
|
|
if ( empty( $og_tags['twitter:image'] ) && ( function_exists( 'jetpack_has_site_logo' ) && jetpack_has_site_logo() ) ) {
|
|
$og_tags['twitter:image'] = jetpack_get_site_logo( 'url' );
|
|
}
|
|
|
|
// Third fall back, Site Icon
|
|
if ( empty( $og_tags['twitter:image'] ) && has_site_icon() ) {
|
|
$og_tags['twitter:image'] = get_site_icon_url( '240' );
|
|
}
|
|
|
|
// Not falling back on Gravatar, because there's no way to know if we end up with an auto-generated one.
|
|
|
|
} elseif ( $img_count && ( 'image' == $extract['type'] || 'gallery' == $extract['type'] ) ) {
|
|
// Test for $extract['type'] to limit to image and gallery, so we don't send a potential fallback image like a Gravatar as a photo post.
|
|
$card_type = 'summary_large_image';
|
|
$og_tags['twitter:image'] = esc_url( add_query_arg( 'w', 1400, ( empty( $extract['images'] ) ) ? $extract['image'] : $extract['images'][0]['url'] ) );
|
|
}
|
|
|
|
return array( $og_tags, $card_type );
|
|
}
|
|
|
|
static function twitter_cards_output( $og_tag ) {
|
|
return ( false !== strpos( $og_tag, 'twitter:' ) ) ? preg_replace( '/property="([^"]+)"/', 'name="\1"', $og_tag ) : $og_tag;
|
|
}
|
|
|
|
static function settings_init() {
|
|
add_settings_section( 'jetpack-twitter-cards-settings', 'Twitter Cards', '__return_false', 'sharing' );
|
|
add_settings_field(
|
|
'jetpack-twitter-cards-site-tag',
|
|
__( 'Twitter Site Tag', 'jetpack' ),
|
|
array( __CLASS__, 'settings_field' ),
|
|
'sharing',
|
|
'jetpack-twitter-cards-settings',
|
|
array(
|
|
'label_for' => 'jetpack-twitter-cards-site-tag',
|
|
)
|
|
);
|
|
}
|
|
|
|
static function sharing_global_options() {
|
|
do_settings_fields( 'sharing', 'jetpack-twitter-cards-settings' );
|
|
}
|
|
|
|
static function site_tag() {
|
|
$site_tag = ( defined( 'IS_WPCOM' ) && IS_WPCOM ) ?
|
|
trim( get_option( 'twitter_via' ) ) :
|
|
Jetpack_Options::get_option_and_ensure_autoload( 'jetpack-twitter-cards-site-tag', '' );
|
|
if ( empty( $site_tag ) ) {
|
|
/** This action is documented in modules/sharedaddy/sharing-sources.php */
|
|
return apply_filters( 'jetpack_sharing_twitter_via', '', null );
|
|
}
|
|
return $site_tag;
|
|
}
|
|
|
|
static function settings_field() {
|
|
wp_nonce_field( 'jetpack-twitter-cards-settings', 'jetpack_twitter_cards_nonce', false );
|
|
?>
|
|
<input type="text" id="jetpack-twitter-cards-site-tag" class="regular-text" name="jetpack-twitter-cards-site-tag" value="<?php echo esc_attr( get_option( 'jetpack-twitter-cards-site-tag' ) ); ?>" />
|
|
<p class="description" style="width: auto;"><?php esc_html_e( 'The Twitter username of the owner of this site\'s domain.', 'jetpack' ); ?></p>
|
|
<?php
|
|
}
|
|
|
|
static function settings_validate() {
|
|
if ( wp_verify_nonce( $_POST['jetpack_twitter_cards_nonce'], 'jetpack-twitter-cards-settings' ) ) {
|
|
update_option( 'jetpack-twitter-cards-site-tag', trim( ltrim( strip_tags( $_POST['jetpack-twitter-cards-site-tag'] ), '@' ) ) );
|
|
}
|
|
}
|
|
|
|
static function init() {
|
|
add_filter( 'jetpack_open_graph_tags', array( __CLASS__, 'twitter_cards_tags' ) );
|
|
add_filter( 'jetpack_open_graph_output', array( __CLASS__, 'twitter_cards_output' ) );
|
|
add_filter( 'jetpack_twitter_cards_site_tag', array( __CLASS__, 'site_tag' ), -99 );
|
|
add_filter( 'jetpack_twitter_cards_site_tag', array( __CLASS__, 'prioritize_creator_over_default_site' ), 99, 2 );
|
|
add_action( 'admin_init', array( __CLASS__, 'settings_init' ) );
|
|
add_action( 'sharing_global_options', array( __CLASS__, 'sharing_global_options' ) );
|
|
add_action( 'sharing_admin_update', array( __CLASS__, 'settings_validate' ) );
|
|
}
|
|
}
|
|
|
|
Jetpack_Twitter_Cards::init();
|