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<?php
/**
* CMB2 Base - Base object functionality.
*
* @category WordPress_Plugin
* @package CMB2
* @author CMB2 team
* @license GPL-2.0+
* @link https://cmb2.io
*
* @property-read $args The objects array of properties/arguments.
* @property-read $meta_box The objects array of properties/arguments.
* @property-read $properties The objects array of properties/arguments.
* @property-read $cmb_id Current CMB2 instance ID
* @property-read $object_id Object ID
* @property-read $object_type Type of object being handled. (e.g., post, user, comment, or term)
*/
abstract class CMB2_Base {
/**
* Current CMB2 instance ID
*
* @var string
* @since 2.2.3
*/
protected $cmb_id = '';
/**
* The object properties name.
*
* @var string
* @since 2.2.3
*/
protected $properties_name = 'meta_box';
/**
* Object ID
*
* @var mixed
* @since 2.2.3
*/
protected $object_id = 0;
/**
* Type of object being handled. (e.g., post, user, comment, or term)
*
* @var string
* @since 2.2.3
*/
protected $object_type = '';
/**
* Array of key => value data for saving. Likely $_POST data.
*
* @var array
* @since 2.2.3
*/
public $data_to_save = array();
/**
* Array of field param callback results
*
* @var array
* @since 2.0.0
*/
protected $callback_results = array();
/**
* The deprecated_param method deprecated param message signature.
*/
const DEPRECATED_PARAM = 1;
/**
* The deprecated_param method deprecated callback param message signature.
*/
const DEPRECATED_CB_PARAM = 2;
/**
* Get started
*
* @since 2.2.3
* @param array $args Object properties array
*/
public function __construct( $args = array() ) {
if ( ! empty( $args ) ) {
foreach ( array(
'cmb_id',
'properties_name',
'object_id',
'object_type',
'data_to_save',
) as $object_prop ) {
if ( isset( $args[ $object_prop ] ) ) {
$this->{$object_prop} = $args[ $object_prop ];
}
}
}
}
/**
* Returns the object ID
*
* @since 2.2.3
* @param integer $object_id Object ID
* @return integer Object ID
*/
public function object_id( $object_id = 0 ) {
if ( $object_id ) {
$this->object_id = $object_id;
}
return $this->object_id;
}
/**
* Returns the object type
*
* @since 2.2.3
* @param string $object_type Object Type
* @return string Object type
*/
public function object_type( $object_type = '' ) {
if ( $object_type ) {
$this->object_type = $object_type;
}
return $this->object_type;
}
/**
* Get the object type for the current page, based on the $pagenow global.
*
* @since 2.2.2
* @return string Page object type name.
*/
public function current_object_type() {
global $pagenow;
$type = 'post';
if ( in_array( $pagenow, array( 'user-edit.php', 'profile.php', 'user-new.php' ), true ) ) {
$type = 'user';
}
if ( in_array( $pagenow, array( 'edit-comments.php', 'comment.php' ), true ) ) {
$type = 'comment';
}
if ( in_array( $pagenow, array( 'edit-tags.php', 'term.php' ), true ) ) {
$type = 'term';
}
return $type;
}
/**
* Set object property.
*
* @since 2.2.2
* @param string $property Metabox config property to retrieve
* @param mixed $value Value to set if no value found
* @return mixed Metabox config property value or false
*/
public function set_prop( $property, $value ) {
$this->{$this->properties_name}[ $property ] = $value;
return $this->prop( $property );
}
/**
* Get object property and optionally set a fallback
*
* @since 2.0.0
* @param string $property Metabox config property to retrieve
* @param mixed $fallback Fallback value to set if no value found
* @return mixed Metabox config property value or false
*/
public function prop( $property, $fallback = null ) {
if ( array_key_exists( $property, $this->{$this->properties_name} ) ) {
return $this->{$this->properties_name}[ $property ];
} elseif ( $fallback ) {
return $this->{$this->properties_name}[ $property ] = $fallback;
}
}
/**
* Get default field arguments specific to this CMB2 object.
*
* @since 2.2.0
* @param array $field_args Metabox field config array.
* @param CMB2_Field $field_group (optional) CMB2_Field object (group parent)
* @return array Array of field arguments.
*/
protected function get_default_args( $field_args, $field_group = null ) {
if ( $field_group ) {
$args = array(
'field_args' => $field_args,
'group_field' => $field_group,
);
} else {
$args = array(
'field_args' => $field_args,
'object_type' => $this->object_type(),
'object_id' => $this->object_id(),
'cmb_id' => $this->cmb_id,
);
}
return $args;
}
/**
* Get a new field object specific to this CMB2 object.
*
* @since 2.2.0
* @param array $field_args Metabox field config array.
* @param CMB2_Field $field_group (optional) CMB2_Field object (group parent)
* @return CMB2_Field CMB2_Field object
*/
protected function get_new_field( $field_args, $field_group = null ) {
return new CMB2_Field( $this->get_default_args( $field_args, $field_group ) );
}
/**
* Determine whether this cmb object should show, based on the 'show_on_cb' callback.
*
* @since 2.0.9
*
* @return bool Whether this cmb should be shown.
*/
public function should_show() {
// Default to showing this cmb
$show = true;
// Use the callback to determine showing the cmb, if it exists
if ( is_callable( $this->prop( 'show_on_cb' ) ) ) {
$show = (bool) call_user_func( $this->prop( 'show_on_cb' ), $this );
}
return $show;
}
/**
* Displays the results of the param callbacks.
*
* @since 2.0.0
* @param string $param Field parameter
*/
public function peform_param_callback( $param ) {
echo $this->get_param_callback_result( $param );
}
/**
* Store results of the param callbacks for continual access
*
* @since 2.0.0
* @param string $param Field parameter
* @return mixed Results of param/param callback
*/
public function get_param_callback_result( $param ) {
// If we've already retrieved this param's value,
if ( array_key_exists( $param, $this->callback_results ) ) {
// send it back
return $this->callback_results[ $param ];
}
// Check if parameter has registered a callback.
if ( $cb = $this->maybe_callback( $param ) ) {
// Ok, callback is good, let's run it and store the result.
ob_start();
$returned = $this->do_callback( $cb );
// Grab the result from the output buffer and store it.
$echoed = ob_get_clean();
// This checks if the user returned or echoed their callback.
// Defaults to using the echoed value.
$this->callback_results[ $param ] = $echoed ? $echoed : $returned;
} else {
// Otherwise just get whatever is there.
$this->callback_results[ $param ] = isset( $this->{$this->properties_name}[ $param ] ) ? $this->{$this->properties_name}[ $param ] : false;
}
return $this->callback_results[ $param ];
}
/**
* Unset the cached results of the param callback.
*
* @since 2.2.6
* @param string $param Field parameter
* @return CMB2_Base
*/
public function unset_param_callback_cache( $param ) {
if ( isset( $this->callback_results[ $param ] ) ) {
unset( $this->callback_results[ $param ] );
}
return $this;
}
/**
* Handles the parameter callbacks, and passes this object as parameter.
*
* @since 2.2.3
* @param callable $cb The callback method/function/closure
* @param mixed $additional_params Any additoinal parameters which should be passed to the callback.
* @return mixed Return of the callback function.
*/
protected function do_callback( $cb, $additional_params = null ) {
return call_user_func( $cb, $this->{$this->properties_name}, $this, $additional_params );
}
/**
* Checks if field has a callback value
*
* @since 1.0.1
* @param string $cb Callback string
* @return mixed NULL, false for NO validation, or $cb string if it exists.
*/
public function maybe_callback( $cb ) {
$args = $this->{$this->properties_name};
if ( ! isset( $args[ $cb ] ) ) {
return null;
}
// Check if requesting explicitly false
$cb = false !== $args[ $cb ] && 'false' !== $args[ $cb ] ? $args[ $cb ] : false;
// If requesting NO validation, return false
if ( ! $cb ) {
return false;
}
if ( is_callable( $cb ) ) {
return $cb;
}
return null;
}
/**
* Checks if this object has parameter corresponding to the given filter
* which is callable. If so, it registers the callback, and if not,
* converts the maybe-modified $val to a boolean for return.
*
* The registered handlers will have a parameter name which matches the filter, except:
* - The 'cmb2_api' prefix will be removed
* - A '_cb' suffix will be added (to stay inline with other '*_cb' parameters).
*
* @since 2.2.3
*
* @param string $hook_name The hook name.
* @param bool $val The default value.
* @param string $hook_function The hook function. Default: 'add_filter'
*
* @return null|bool Null if hook is registered, or bool for value.
*/
public function maybe_hook_parameter( $hook_name, $val = null, $hook_function = 'add_filter' ) {
// Remove filter prefix, add param suffix.
$parameter = substr( $hook_name, strlen( 'cmb2_api_' ) ) . '_cb';
return self::maybe_hook(
$this->prop( $parameter, $val ),
$hook_name,
$hook_function
);
}
/**
* Checks if given value is callable, and registers the callback.
* If is non-callable, converts the $val to a boolean for return.
*
* @since 2.2.3
*
* @param bool $val The default value.
* @param string $hook_name The hook name.
* @param string $hook_function The hook function.
*
* @return null|bool Null if hook is registered, or bool for value.
*/
public static function maybe_hook( $val, $hook_name, $hook_function ) {
if ( is_callable( $val ) ) {
$hook_function( $hook_name, $val, 10, 2 );
return null;
}
// Cast to bool.
return ! ! $val;
}
/**
* Mark a param as deprecated and inform when it has been used.
*
* There is a default WordPress hook deprecated_argument_run that will be called
* that can be used to get the backtrace up to what file and function used the
* deprecated argument.
*
* The current behavior is to trigger a user error if WP_DEBUG is true.
*
* @since 2.2.3
*
* @param string $function The function that was called.
* @param string $version The version of CMB2 that deprecated the argument used.
* @param string $message Optional. A message regarding the change, or numeric
* key to generate message from additional arguments.
* Default null.
*/
protected function deprecated_param( $function, $version, $message = null ) {
if ( is_numeric( $message ) ) {
$args = func_get_args();
switch ( $message ) {
case self::DEPRECATED_PARAM:
$message = sprintf( __( 'The "%1$s" field parameter has been deprecated in favor of the "%2$s" parameter.', 'cmb2' ), $args[3], $args[4] );
break;
case self::DEPRECATED_CB_PARAM:
$message = sprintf( __( 'Using the "%1$s" field parameter as a callback has been deprecated in favor of the "%2$s" parameter.', 'cmb2' ), $args[3], $args[4] );
break;
default:
$message = null;
break;
}
}
/**
* Fires when a deprecated argument is called. This is a WP core action.
*
* @since 2.2.3
*
* @param string $function The function that was called.
* @param string $message A message regarding the change.
* @param string $version The version of CMB2 that deprecated the argument used.
*/
do_action( 'deprecated_argument_run', $function, $message, $version );
/**
* Filters whether to trigger an error for deprecated arguments. This is a WP core filter.
*
* @since 2.2.3
*
* @param bool $trigger Whether to trigger the error for deprecated arguments. Default true.
*/
if ( defined( 'WP_DEBUG' ) && WP_DEBUG && apply_filters( 'deprecated_argument_trigger_error', true ) ) {
if ( function_exists( '__' ) ) {
if ( ! is_null( $message ) ) {
trigger_error( sprintf( __( '%1$s was called with a parameter that is <strong>deprecated</strong> since version %2$s! %3$s', 'cmb2' ), $function, $version, $message ) );
} else {
trigger_error( sprintf( __( '%1$s was called with a parameter that is <strong>deprecated</strong> since version %2$s with no alternative available.', 'cmb2' ), $function, $version ) );
}
} else {
if ( ! is_null( $message ) ) {
trigger_error( sprintf( '%1$s was called with a parameter that is <strong>deprecated</strong> since version %2$s! %3$s', $function, $version, $message ) );
} else {
trigger_error( sprintf( '%1$s was called with a parameter that is <strong>deprecated</strong> since version %2$s with no alternative available.', $function, $version ) );
}
}
}
}
/**
* Magic getter for our object.
*
* @param string $field
* @throws Exception Throws an exception if the field is invalid.
* @return mixed
*/
public function __get( $field ) {
switch ( $field ) {
case 'args':
case 'meta_box':
if ( $field === $this->properties_name ) {
return $this->{$this->properties_name};
}
case 'properties':
return $this->{$this->properties_name};
case 'cmb_id':
case 'object_id':
case 'object_type':
return $this->{$field};
default:
throw new Exception( sprintf( esc_html__( 'Invalid %1$s property: %2$s', 'cmb2' ), __CLASS__, $field ) );
}
}
/**
* Allows overloading the object with methods... Whooaaa oooh it's magic, y'knoooow.
*
* @since 1.0.0
* @param string $method Non-existent method.
* @param array $args All arguments passed to the method
*/
public function __call( $method, $args ) {
$object_class = strtolower( get_class( $this ) );
if ( ! has_filter( "{$object_class}_inherit_{$method}" ) ) {
throw new Exception( sprintf( esc_html__( 'Invalid %1$s method: %2$s', 'cmb2' ), get_class( $this ), $method ) );
}
array_unshift( $args, $this );
/**
* Allows overloading the object (CMB2 or CMB2_Field) with additional capabilities
* by registering hook callbacks.
*
* The first dynamic portion of the hook name, $object_class, refers to the object class,
* either cmb2 or cmb2_field.
*
* The second dynamic portion of the hook name, $method, is the non-existent method being
* called on the object. To avoid possible future methods encroaching on your hooks,
* use a unique method (aka, $cmb->prefix_my_method()).
*
* When registering your callback, you will need to ensure that you register the correct
* number of `$accepted_args`, accounting for this object instance being the first argument.
*
* @param array $args The arguments to be passed to the hook.
* The first argument will always be this object instance.
*/
return apply_filters_ref_array( "{$object_class}_inherit_{$method}", $args );
}
}