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<?php
/**
* Variable model.
*
* Replace '%variables%' in strings based on context.
*
* @since 1.0.33
* @package RankMath
* @subpackage RankMath\Replace_Variables
* @author Rank Math <support@rankmath.com>
*/
namespace RankMath\Replace_Variables;
defined( 'ABSPATH' ) || exit;
/**
* Variable class.
*/
class Variable {
/**
* Required properties.
*
* @var array
*/
private static $required = [ 'name', 'description', 'variable' ];
/**
* The unique id.
*
* @var string
*/
protected $id;
/**
* The name of the variabe.
*
* @var string
*/
protected $name;
/**
* The description of the variable.
*
* @var string
*/
protected $description;
/**
* The variable to use.
*
* @var string
*/
protected $variable;
/**
* The example for the variable.
*
* @var string
*/
protected $example;
/**
* The callback to get the replacement value.
*
* @var mixed
*/
protected $callback;
/**
* The variable is cacheable or not.
*
* @var bool
*/
protected $cacheable = true;
/**
* Create variable from array.
*
* @throws \InvalidArgumentException If `$id` is empty.
*
* @param string $id Unique id of variable.
* @param array $args Array of values.
*
* @return Variable
*/
public static function from( $id, $args ) {
if ( empty( $id ) ) {
throw new \InvalidArgumentException( __( 'The $id variable is required.', 'rank-math' ) );
}
$variable = new Variable();
$variable->id = $id;
$variable->example = isset( $args['example'] ) ? $args['example'] : __( 'Example', 'rank-math' );
foreach ( self::$required as $key ) {
if ( ! isset( $args[ $key ] ) ) {
/* translators: variable name */
throw new \InvalidArgumentException( sprintf( __( 'The $%1$s is required for variable %2$s.', 'rank-math' ), $key, $id ) );
}
$variable->$key = $args[ $key ];
}
if ( isset( $args['nocache'] ) && $args['nocache'] ) {
$variable->cacheable = false;
}
return $variable;
}
/**
* Returns the id.
*
* @return string
*/
public function get_id() {
return $this->id;
}
/**
* Returns the name.
*
* @return string
*/
public function get_name() {
return $this->name;
}
/**
* Returns the description.
*
* @return string
*/
public function get_description() {
return $this->description;
}
/**
* Returns the variable.
*
* @return string
*/
public function get_variable() {
return $this->variable;
}
/**
* Returns the example.
*
* @return string
*/
public function get_example() {
return $this->example;
}
/**
* Set example.
*
* @param string $example New example.
*/
public function set_example( $example ) {
$this->example = $example;
}
/**
* Set callback.
*
* @param mixed $callback New callback.
*/
public function set_callback( $callback ) {
$this->callback = $callback;
}
/**
* Run callback.
*
* @param array $var_args Array of arguments passed with variable.
* @param array $args The object some of the replacement values might come from,
* could be a post, taxonomy or term.
*
* @return mixed
*/
public function run_callback( $var_args, $args = [] ) {
rank_math()->variables->set_arguments( $args );
$value = ! empty( $this->callback ) ? call_user_func( $this->callback, $var_args, $args ) :
apply_filters( 'rank_math/vars/' . $this->get_id(), $var_args, $this );
rank_math()->variables->reset_arguments();
return $value;
}
/**
* Convert object to array.
*
* @return array Object as array.
*/
public function to_array() {
$arr = [];
foreach ( [ 'name', 'description', 'variable', 'example' ] as $key ) {
$arr[ $key ] = $this->$key;
}
return $arr;
}
/**
* Returns the variable is cacheable or not.
*
* @return bool
*/
public function is_cacheable() {
return $this->cacheable;
}
}