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<?php
/**
* WPSEO plugin file.
*
* @package WPSEO\Admin
*/
/**
* Determines the recommended replacement variables based on the context.
*/
class WPSEO_Admin_Recommended_Replace_Vars {
/**
* The recommended replacement variables.
*
* @var array
*/
protected $recommended_replace_vars = [
// Posts types.
'page' => [ 'sitename', 'title', 'sep', 'primary_category' ],
'post' => [ 'sitename', 'title', 'sep', 'primary_category' ],
// Homepage.
'homepage' => [ 'sitename', 'sitedesc', 'sep' ],
// Custom post type.
'custom_post_type' => [ 'sitename', 'title', 'sep' ],
// Taxonomies.
'category' => [ 'sitename', 'term_title', 'sep', 'term_hierarchy' ],
'post_tag' => [ 'sitename', 'term_title', 'sep' ],
'post_format' => [ 'sitename', 'term_title', 'sep', 'page' ],
// Custom taxonomy.
'term-in-custom-taxonomy' => [ 'sitename', 'term_title', 'sep', 'term_hierarchy' ],
// Settings - archive pages.
'author_archive' => [ 'sitename', 'title', 'sep', 'page' ],
'date_archive' => [ 'sitename', 'sep', 'date', 'page' ],
'custom-post-type_archive' => [ 'sitename', 'title', 'sep', 'page' ],
// Settings - special pages.
'search' => [ 'sitename', 'searchphrase', 'sep', 'page' ],
'404' => [ 'sitename', 'sep' ],
];
/**
* Determines the page type of the current term.
*
* @param string $taxonomy The taxonomy name.
*
* @return string The page type.
*/
public function determine_for_term( $taxonomy ) {
$recommended_replace_vars = $this->get_recommended_replacevars();
if ( array_key_exists( $taxonomy, $recommended_replace_vars ) ) {
return $taxonomy;
}
return 'term-in-custom-taxonomy';
}
/**
* Determines the page type of the current post.
*
* @param WP_Post $post A WordPress post instance.
*
* @return string The page type.
*/
public function determine_for_post( $post ) {
if ( $post instanceof WP_Post === false ) {
return 'post';
}
if ( $post->post_type === 'page' && $this->is_homepage( $post ) ) {
return 'homepage';
}
$recommended_replace_vars = $this->get_recommended_replacevars();
if ( array_key_exists( $post->post_type, $recommended_replace_vars ) ) {
return $post->post_type;
}
return 'custom_post_type';
}
/**
* Determines the page type for a post type.
*
* @param string $post_type The name of the post_type.
* @param string $fallback The page type to fall back to.
*
* @return string The page type.
*/
public function determine_for_post_type( $post_type, $fallback = 'custom_post_type' ) {
$page_type = $post_type;
$recommended_replace_vars = $this->get_recommended_replacevars();
$has_recommended_replacevars = $this->has_recommended_replace_vars( $recommended_replace_vars, $page_type );
if ( ! $has_recommended_replacevars ) {
return $fallback;
}
return $page_type;
}
/**
* Determines the page type for an archive page.
*
* @param string $name The name of the archive.
* @param string $fallback The page type to fall back to.
*
* @return string The page type.
*/
public function determine_for_archive( $name, $fallback = 'custom-post-type_archive' ) {
$page_type = $name . '_archive';
$recommended_replace_vars = $this->get_recommended_replacevars();
$has_recommended_replacevars = $this->has_recommended_replace_vars( $recommended_replace_vars, $page_type );
if ( ! $has_recommended_replacevars ) {
return $fallback;
}
return $page_type;
}
/**
* Retrieves the recommended replacement variables for the given page type.
*
* @param string $page_type The page type.
*
* @return array The recommended replacement variables.
*/
public function get_recommended_replacevars_for( $page_type ) {
$recommended_replace_vars = $this->get_recommended_replacevars();
$has_recommended_replace_vars = $this->has_recommended_replace_vars( $recommended_replace_vars, $page_type );
if ( ! $has_recommended_replace_vars ) {
return [];
}
return $recommended_replace_vars[ $page_type ];
}
/**
* Retrieves the recommended replacement variables.
*
* @return array The recommended replacement variables.
*/
public function get_recommended_replacevars() {
/**
* Filter: Adds the possibility to add extra recommended replacement variables.
*
* @param array $additional_replace_vars Empty array to add the replacevars to.
*/
$recommended_replace_vars = apply_filters( 'wpseo_recommended_replace_vars', $this->recommended_replace_vars );
if ( ! is_array( $recommended_replace_vars ) ) {
return $this->recommended_replace_vars;
}
return $recommended_replace_vars;
}
/**
* Returns whether the given page type has recommended replace vars.
*
* @param array $recommended_replace_vars The recommended replace vars
* to check in.
* @param string $page_type The page type to check.
*
* @return bool True if there are associated recommended replace vars.
*/
private function has_recommended_replace_vars( $recommended_replace_vars, $page_type ) {
if ( ! isset( $recommended_replace_vars[ $page_type ] ) ) {
return false;
}
if ( ! is_array( $recommended_replace_vars[ $page_type ] ) ) {
return false;
}
return true;
}
/**
* Determines whether or not a post is the homepage.
*
* @param WP_Post $post The WordPress global post object.
*
* @return bool True if the given post is the homepage.
*/
private function is_homepage( $post ) {
if ( $post instanceof WP_Post === false ) {
return false;
}
/*
* The page on front returns a string with normal WordPress interaction, while the post ID is an int.
* This way we make sure we always compare strings.
*/
$post_id = (int) $post->ID;
$page_on_front = (int) get_option( 'page_on_front' );
return get_option( 'show_on_front' ) === 'page' && $page_on_front === $post_id;
}
}