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<?php
/**
* The abstract choice field.
*
* @package Meta Box
*/
/**
* Abstract class for any kind of choice field.
*/
abstract class RWMB_Choice_Field extends RWMB_Field {
/**
* Walk options.
*
* @param array $field Field parameters.
* @param mixed $options Select options.
* @param mixed $db_fields Database fields to use in the output.
* @param mixed $meta Meta value.
* @return string
*/
public static function walk( $field, $options, $db_fields, $meta ) {
return '';
}
/**
* Get field HTML.
*
* @param mixed $meta Meta value.
* @param array $field Field parameters.
* @return string
*/
public static function html( $meta, $field ) {
$meta = (array) $meta;
$options = self::call( 'get_options', $field );
$options = self::call( 'filter_options', $field, $options );
$db_fields = self::call( 'get_db_fields', $field );
return ! empty( $options ) ? self::call( 'walk', $field, $options, $db_fields, $meta ) : null;
}
/**
* Normalize parameters for field.
*
* @param array $field Field parameters.
* @return array
*/
public static function normalize( $field ) {
$field = parent::normalize( $field );
$field = wp_parse_args( $field, array(
'flatten' => true,
'options' => array(),
) );
return $field;
}
/**
* Get field names of object to be used by walker.
*
* @return array
*/
public static function get_db_fields() {
return array(
'parent' => 'parent',
'id' => 'value',
'label' => 'label',
);
}
/**
* Get options for walker.
*
* @param array $field Field parameters.
*
* @return array
*/
public static function get_options( $field ) {
$options = array();
foreach ( (array) $field['options'] as $value => $label ) {
$option = is_array( $label ) ? $label : array(
'label' => (string) $label,
'value' => (string) $value,
);
if ( isset( $option['label'] ) && isset( $option['value'] ) ) {
$options[ $option['value'] ] = (object) $option;
}
}
return $options;
}
/**
* Filter options for walker.
*
* @param array $field Field parameters.
* @param array $options Array of choice options.
*
* @return array
*/
public static function filter_options( $field, $options ) {
$db_fields = self::call( 'get_db_fields', $field );
$label = $db_fields['label'];
foreach ( $options as &$option ) {
$option = apply_filters( 'rwmb_option', $option, $field );
$option->$label = apply_filters( 'rwmb_option_label', $option->$label, $option, $field );
}
return $options;
}
/**
* Format a single value for the helper functions.
*
* @param array $field Field parameters.
* @param string $value Meta value.
* @return string
*/
public static function format_single_value( $field, $value ) {
return self::call( 'get_option_label', $field, $value );
}
/**
* Get option label.
*
* @param array $field Field parameters.
* @param string $value Option value.
*
* @return string
*/
public static function get_option_label( $field, $value ) {
$options = self::call( 'get_options', $field );
return isset( $options[ $value ] ) ? $options[ $value ]->label : '';
}
}
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