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<?php
/**
* Open Graph
*
*/
defined( 'ABSPATH' ) || exit; // Exit if accessed directly
if( ! class_exists( 'TIELABS_OPENGRAPH' )){
class TIELABS_OPENGRAPH {
/**
* Runs on class initialization. Adds filters and actions.
*/
function __construct() {
add_action( 'wp_head', array( $this, 'insert_opengraph' ), 5 );
add_filter( 'language_attributes', array( $this, 'opengraph_namespace' ) );
}
/**
* Open Graph Meta for posts
*/
function insert_opengraph(){
// Check if single and og is active and there is no OG plugin is active
if( self::is_active() || ! is_singular() || ! tie_get_option( 'post_og_cards' ) ){
return;
}
$post = get_post();
$og_title = the_title_attribute( 'echo=0' ) . ' - ' . get_bloginfo('name') ;
$og_description = apply_filters( 'TieLabs/exclude_content', $post->post_content );
$og_description = strip_tags( strip_shortcodes( $og_description ) );
$og_type = 'article';
if( is_home() || is_front_page() ){
$og_title = get_bloginfo( 'name' );
$og_description = get_bloginfo( 'description' );
$og_type = 'website';
}
echo '
<meta property="og:title" content="'. $og_title .'" />
<meta property="og:type" content="'. $og_type .'" />
<meta property="og:description" content="'. esc_attr( wp_html_excerpt( $og_description, 100 ) ) .'" />
<meta property="og:url" content="'. get_permalink() .'" />
<meta property="og:site_name" content="'. get_bloginfo( 'name' ) .'" />
';
if ( has_post_thumbnail() || tie_get_option( 'post_og_cards_image' ) ){
$image = has_post_thumbnail() ? tie_thumb_src( TIELABS_THEME_SLUG.'-image-post' ) : tie_get_option( 'post_og_cards_image' );
echo '<meta property="og:image" content="'. esc_url( $image ) .'" />'."\n";
}
}
/**
* Add the opengraph namespace to the <html> tag
*/
function opengraph_namespace( $input ){
// Check if single and og is active and there is no OG plugin is active
if( is_admin() || self::is_active() || ! is_singular() || ! tie_get_option( 'post_og_cards' )){
return $input;
}
return $input.' prefix="og: http://ogp.me/ns#"';
}
/**
* Check if an open graph plugin active
*/
public static function is_active(){
$is_active = false;
// Yoast SEO
if( class_exists( 'WPSEO_Frontend' ) ){
$yoast = get_option( 'wpseo_social' );
if( ! empty( $yoast['opengraph'] )){
$is_active = true;
}
}
// Open Graph and Twitter Card Tags
elseif( class_exists( 'Webdados_FB' ) ){
$is_active = true;
}
return apply_filters( 'TieLabs/is_opengraph_active', $is_active );
}
}
// Single instance
$TIELABS_OPENGRAPH = new TIELABS_OPENGRAPH();
}