Defined (1)

The class is defined in the following location(s).

/frontend/class-primary-category.php  

class WPSEO_Frontend_Primary_Category { 
 
    /** 
     * Registers the hooks necessary for correct primary category behaviour. 
     */ 
    public function register_hooks() { 
        add_filter( 'post_link_category', array( $this, 'post_link_category' ) , 10, 3 ); 
    } 
 
    /** 
     * Filters post_link_category to change the category to the chosen category by the user 
     * 
     * @param stdClass $category The category that is now used for the post link. 
     * @param array    $categories This parameter is not used. 
     * @param WP_Post  $post The post in question. 
     * 
     * @return array|null|object|WP_Error The category we want to use for the post link. 
     */ 
    public function post_link_category( $category, $categories = null, $post = null ) { 
        $post = get_post( $post ); 
        $primary_category = $this->get_primary_category( $post ); 
 
        if ( false !== $primary_category && $primary_category !== $category->cat_ID ) { 
            $category = $this->get_category( $primary_category ); 
        } 
 
        return $category; 
    } 
 
    /** 
     * Get the id of the primary category 
     * 
     * @param WP_Post $post The post in question. 
     * 
     * @return int primary category id 
     */ 
    protected function get_primary_category( $post = null ) { 
        $post = get_post( $post ); 
 
        if ( $post === null ) { 
            return false; 
        } 
 
        $primary_term = new WPSEO_Primary_Term( 'category', $post->ID ); 
 
        return $primary_term->get_primary_term(); 
    } 
 
    /** 
     * Wrapper for get category to make mocking easier 
     * 
     * @param int $primary_category id of primary category. 
     * 
     * @return array|null|object|WP_Error 
     */ 
    protected function get_category( $primary_category ) { 
        $category = get_category( $primary_category ); 
 
        return $category; 
    } 
}