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<?php
/**
* Term field group.
*
* @since 1.9
*/
class Types_Field_Group_Term extends Types_Field_Group {
const POST_TYPE = 'wp-types-term-group';
/**
* Key for postmeta that holds slugs of taxonomies associated with this group. This is a "plural" postmeta,
* each record contains one slug.
*/
const POSTMETA_ASSOCIATED_TAXONOMY = '_wp_types_associated_taxonomy';
/**
* Types_Field_Group_Term constructor.
*
* @param WP_Post $field_group_post Post object representing a term field group.
* @throws InvalidArgumentException
*/
public function __construct( $field_group_post ) {
parent::__construct( $field_group_post );
if( self::POST_TYPE != $field_group_post->post_type ) {
throw new InvalidArgumentException( 'incorrect post type' );
}
}
/**
* @return WPCF_Field_Definition_Factory Field definition factory of the correct type.
*/
protected function get_field_definition_factory() {
return WPCF_Field_Definition_Factory_Term::get_instance();
}
/**
* Get taxonomies that are associated with this field group.
*
* @return string[] Taxonomy slugs. Empty array means that this group should be displayed with all taxonomies.
*/
public function get_associated_taxonomies() {
$postmeta = get_post_meta( $this->get_id(), self::POSTMETA_ASSOCIATED_TAXONOMY, false );
// Survive empty or whitespace taxonomy slugs (skip them). They are invalid values but
// if we have only them, we need to return an empty array to keep the group displayed everywhere.
foreach( $postmeta as $index => $taxonomy_slug ) {
$taxonomy_slug = trim( $taxonomy_slug );
if( empty( $taxonomy_slug ) ) {
unset( $postmeta[ $index ] );
}
}
return wpcf_ensarr( $postmeta );
}
/**
* Quickly determine whether given taxonomy is associated with this group.
*
* @param string $taxonomy_slug
* @return bool
*/
public function has_associated_taxonomy( $taxonomy_slug ) {
$taxonomies = $this->get_associated_taxonomies();
return ( empty( $taxonomies ) || in_array( $taxonomy_slug, $taxonomies ) );
}
/**
* Remove association with a single taxonomy from the database.
*
* @param string $taxonomy_slug Slug of the taxonomy.
*/
private function remove_associated_taxonomy( $taxonomy_slug ) {
if( empty( $taxonomy_slug ) ) {
return;
}
delete_post_meta( $this->get_id(), self::POSTMETA_ASSOCIATED_TAXONOMY, $taxonomy_slug );
$this->execute_group_updated_action();
}
/**
* Add an association with a single taxonomy to the database.
*
* @param string $taxonomy_slug Slug of the taxonomy. If empty or not sanitized, the function does nothing.
*/
private function add_associated_taxonomy( $taxonomy_slug ) {
if( empty( $taxonomy_slug ) || $taxonomy_slug != sanitize_title( $taxonomy_slug )) {
return;
}
add_post_meta( $this->get_id(), self::POSTMETA_ASSOCIATED_TAXONOMY, $taxonomy_slug );
$this->execute_group_updated_action();
}
/**
* Update the set of taxonomies associated with this field group.
*
* @param string[] $taxonomy_slugs Array of (sanitized) taxonomy slugs.
*/
public function update_associated_taxonomies( $taxonomy_slugs ) {
$current_taxonomies = $this->get_associated_taxonomies();
// Remove taxonomies that are associated but shouldn't be.
$to_remove = array_diff( $current_taxonomies, $taxonomy_slugs );
foreach( $to_remove as $taxonomy_slug ) {
$this->remove_associated_taxonomy( $taxonomy_slug );
}
// Add taxonomies that aren't associated but should be.
$to_add = array_diff( $taxonomy_slugs, $current_taxonomies );
foreach( $to_add as $taxonomy_slug ) {
$this->add_associated_taxonomy( $taxonomy_slug );
}
}
/** Element name for a single associated taxonomy. */
const XML_ASSOCIATED_TAXONOMY = 'taxonomy';
/**
* @inheritdoc
*
* Add term field group-specific information to the export object.
*
* @return array
* @since 2.1
*/
protected function get_export_fields() {
$data = parent::get_export_fields();
// Array of slugs of associated taxonomies.
$associated_taxonomy_data = implode( ',', $this->get_associated_taxonomies() );
// parent::XML_META_SECTION is ensured by the parent method
$data[ parent::XML_META_SECTION ][ self::POSTMETA_ASSOCIATED_TAXONOMY ] = $associated_taxonomy_data;
return $data;
}
}