options = get_option( 'wpseo_social' );
add_action( 'wpseo_head', array( $this, 'twitter' ), 40 );
}
/**
* Outputs the Twitter Card code on singular pages.
*
* @return false Only shows on singular pages, false on non-singular pages.
*/
public function twitter() {
if ( !is_singular() )
return false;
wp_reset_query();
$this->type();
$this->site_twitter();
$this->author_twitter();
// No need to show these when OpenGraph is also showing, as it'd be the same contents and Twitter
// would fallback to OpenGraph anyway.
$this->image();
$options = get_wpseo_options();
$this->twitter_description();
if ( !isset( $options['opengraph'] ) || !$options['opengraph'] ) {
$this->twitter_title();
$this->twitter_url();
}
do_action( 'wpseo_twitter' );
}
/**
* Display the Twitter card type.
*
* This defaults to summary but can be filtered using the wpseo_twitter_card_type filter.
*/
public function type() {
echo '' . "\n";
}
/**
* Displays the Twitter account for the site.
*/
public function site_twitter() {
if ( isset( $this->options['twitter_site'] ) )
echo '' . "\n";
}
/**
* Displays the authors Twitter account.
*/
public function author_twitter() {
$twitter = trim( get_the_author_meta( 'twitter' ) );
if ( $twitter && !empty( $twitter ) )
echo '' . "\n";
}
/**
* Displays the title for Twitter.
*
* Only used when OpenGraph is inactive.
*/
public function twitter_title() {
echo '' . "\n";
}
/**
* Displays the description for Twitter.
*
* Only used when OpenGraph is inactive.
*/
public function twitter_description() {
$metadesc = trim( $this->metadesc( false ) );
if ( empty( $metadesc ) )
$metadesc = false;
if ( $metadesc && isset( $options['opengraph'] ) && $options['opengraph'] ) {
// Already output the same description in opengraph, no need to repeat.
return;
} else if ( !$metadesc ) {
$metadesc = strip_tags( get_the_excerpt() );
}
echo '' . "\n";
}
/**
* Displays the URL for Twitter.
*
* Only used when OpenGraph is inactive.
*/
public function twitter_url() {
echo '' . "\n";
}
/**
* Displays the image for Twitter
*
* Only used when OpenGraph is inactive.
*/
public function image() {
global $post;
if ( function_exists( 'has_post_thumbnail' ) && has_post_thumbnail( $post->ID ) ) {
$featured_img = wp_get_attachment_image_src( get_post_thumbnail_id( $post->ID ), apply_filters( 'wpseo_opengraph_image_size', 'medium' ) );
if ( $featured_img ) {
$img = apply_filters( 'wpseo_opengraph_image', $featured_img[0] );
echo "\n";
}
} else {
$options = get_wpseo_options();
if ( isset( $options['og_frontpage_image'] ) && !empty( $options['og_frontpage_image'] ) )
echo "\n";
}
}
}
global $wpseo_twitter;
$wpseo_twitter = new WPSEO_Twitter();