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<?php namespace NSRosenqvist\CMB2\Widgets;
use WP_Widget;
use CMB2_hookup;
use CMB2;
abstract class CMB2_Widget extends WP_Widget
{
protected $_instance = [];
protected $fields = null;
protected $defaults = null;
protected $keyMap = []; // TODO: Remove this if not needed
static $init = false;
static $adminInit = false;
function __construct($class, $title, $widget_options = [], $control_options = [])
{
$class = str_replace('\\', '-', $class);
parent::__construct(
// Base ID of widget
$class,
// Widget name will appear in UI
$title,
// Widget options
array_merge([
'classname' => $class,
'customize_selective_refresh' => true,
'description' => __('A CMB2 widget boilerplate description.', 'cmb2-widget'),
], $widget_options),
// Control Options
$control_options
);
if (! is_null($this->fields)) {
$this->processFields($this->fields);
}
add_filter('cmb2_show_on', [$this, 'show_on'], 10, 2);
add_action('admin_init', [self::class, 'adminInit']);
add_action('init', [self::class, 'init']);
}
protected function processFields(array $fields)
{
// Supporting either defining the fields in the typical CMB2 style
// but also by having the keys as id's instead of as a field for
// greater readability
if ($this->is_assoc($fields)) {
foreach ($fields as $id => $field) {
$fields[$id]['id'] = $id;
}
}
else {
foreach ($fields as $key => $field) {
unset($fields[$key]);
$fields[$field['id']] = $field;
}
}
// We store defaults definitions from fields in here in case they
// haven't been defined in $this->defaults
$defaults = [];
foreach ($fields as $id => $field) {
// Extract default value
if (isset($field['default'])) {
if (! isset($this->defaults[$id])) {
$this->defaults[$id] = $field['default'];
}
// Remove default from field definition (messes up widget)
unset($fields[$id]['default']);
}
}
// Build a keymap and set id_key
foreach ($fields as $id => $field) {
// Add id_key if it hasn't been set
if (! isset($field['id_key'])) {
$fields[$id]['id_key'] = $id;
}
// Map id to field name
$this->keyMap[$id] = $this->get_field_name($id);
}
// Set fields
$this->fields = $fields;
}
protected function getFields()
{
return $this->fields;
}
protected function getDefaults()
{
return $this->defaults;
}
protected function getKeyMap()
{
return $this->keyMap;
}
protected function getCMB2Id()
{
return $this->option_name .'_box';
}
public function cmb2($saving = false)
{
// Create a new box in the class
$cmb2 = new CMB2([
'id' => $this->getCMB2Id(), // Option name is taken from the WP_Widget class.
'hookup' => false,
'show_on' => [
'key' => 'options-page', // Tells CMB2 to handle this as an option
'value' => [$this->option_name],
],
], $this->option_name);
// Add fields to form
foreach ($this->getFields() as $field) {
// Translate the id to a widget form field name if we're saving the data
if (! $saving) {
$field['id'] = $this->get_field_name($field['id']);
}
// Add classes
if (isset($field['classes'])) {
if (! is_array($field['classes'])) {
$field['classes'] = [$field['classes']];
}
}
$field['classes'][] = 'cmb2-widgets';
// FIXME: Workaround for issue: https://github.com/CMB2/CMB2-Snippet-Library/issues/66
if ($field['type'] == 'group') {
// Update group fields default_cb
foreach ($field['fields'] as $group_field_index => $group_field) {
$group_field['default_cb'] = array( $this, 'default_cb' );
$field['fields'][$group_field_index] = $group_field;
}
}
// Add callback and then add the field
$field['default_cb'] = array( $this, 'default_cb' );
$cmb2->add_field($field);
}
return $cmb2;
}
static function adminInit()
{
// Only run this once
if (self::$adminInit) {
return;
}
self::$adminInit = true;
// Include assets
self::includes();
}
static function init()
{
// Only run this once
if (self::$init) {
return;
}
self::$init = true;
}
public function cmb2_override_meta_value($value, $object_id, $args, $field)
{
// FIXME: Workaround for issue: https://github.com/CMB2/CMB2-Snippet-Library/issues/66
if ($field->group || 'group' === $field->type()) {
if (isset($field->args['id_key'])) {
$id_key = $field->args['id_key'];
if (isset($this->_instance[$id_key])) {
$value = $this->_instance[$id_key];
}
}
}
return $value;
}
function show_on($display, $meta_box)
{
if ( ! isset($meta_box['show_on']['key'], $meta_box['show_on']['value'])) {
return $display;
}
if ( ! $meta_box['show_on']['key'] != 'widget' ) {
return $display;
}
if ($meta_box['show_on']['value'] == $this->option_name) {
return true;
}
return $display;
}
static function includes()
{
if (defined('DOING_AJAX') && DOING_AJAX) {
return;
}
if (defined('CMB2_LOADED')) {
// Enqueue CMB assets
CMB2_hookup::enqueue_cmb_css();
CMB2_hookup::enqueue_cmb_js();
}
// Register assets
add_action('admin_enqueue_scripts', function() {
wp_register_style('cmb2_widgets', B2_THEME_URI.'/Library/cmb2-widget/assets/cmb2-widgets.css', false, '1.0.0');
wp_register_script('cmb2_widgets', B2_THEME_URI.'/Library/cmb2-widget/assets/cmb2-widgets.js', ['jquery'], '1.0.0');
wp_enqueue_style('cmb2_widgets');
wp_enqueue_script('cmb2_widgets');
});
}
public function update($new_instance, $old_instance)
{
$fields = $this->getFields();
$sanitized = $this->cmb2(true)->get_sanitized_values($new_instance);
// FIXME: Workaround for file id fields not saving properly
// foreach ($new_instance as $id => $value) {
// if ($fields[$id]['type'] == 'file') {
// $sanitized[$id.'_id'] = $file_id = intval($value);
// $sanitized[$id] = wp_get_attachment_url($file_id);
// }
// }
return $sanitized;
}
/**
* Back-end widget form with defaults.
*
* @param array $instance Current settings.
*/
public function form($instance)
{
// FIXME: Workaround for issue: https://github.com/CMB2/CMB2-Snippet-Library/issues/66
add_filter('cmb2_override_meta_value', [$this, 'cmb2_override_meta_value'], 11, 4);
// If there are no settings, set up defaults
$this->_instance = wp_parse_args((array) $instance, $this->getDefaults());
$cmb2 = $this->cmb2();
$cmb2->object_id($this->option_name);
$cmb2->show_form();
remove_filter('cmb2_override_meta_value', [$this, 'cmb2_override_meta_value']);
}
public function widget($args, $instance)
{
parent::widget($args, $instance);
}
public function default_cb($field_args, $field)
{
// FIXME: Workaround for issue: https://github.com/CMB2/CMB2-Snippet-Library/issues/66
if ($field->group) {
if (isset($this->_instance[$field->group->args('id_key')])) {
$data = $this->_instance[$field->group->args('id_key')];
return (is_array($data) && isset($data[$field->group->index][$field->args('id_key')]))
? $data[$field->group->index][$field->args('id_key')]
: null;
}
else {
return null;
}
}
return (isset($this->_instance[$field->args('id_key')]))
? $this->_instance[$field->args('id_key')]
: null;
}
private function is_assoc(array $arr)
{
if (array() === $arr) return false;
return array_keys($arr) !== range(0, count($arr) - 1);
}
}