$option) {
if (isset($option['options']) && is_array($option['options'])) {
$output[] = $this->render_optgroup($option);
continue;
}
$output[] = $this->render_option((string)$key, (string)$option);
}
return implode("\n", $output);
}
protected function render_option(string $key, string $label): string
{
$template = '';
$attributes = $this->get_option_attributes($key);
return sprintf($template, $this->get_attributes_as_string($attributes), esc_html($label));
}
protected function get_option_attributes(string $key): array
{
$attributes = [];
$attributes['value'] = $key;
if ($this->selected($key)) {
$attributes['selected'] = 'selected';
}
return $attributes;
}
protected function selected(string $value): bool
{
return (bool)selected($this->get_value(), $value, false);
}
protected function render_optgroup(array $group): string
{
$template = '';
$attributes = [];
if (isset($group['title'])) {
$attributes['label'] = esc_attr($group['title']);
}
return sprintf(
$template,
$this->get_attributes_as_string($attributes),
$this->render_options($group['options'])
);
}
public function render(): string
{
if ( ! $this->get_options() && $this->get_no_result()) {
return $this->get_no_result();
}
$template = '
%s';
$attributes = $this->get_attributes();
$attributes['name'] = $this->get_name();
$attributes['id'] = $this->get_id();
return sprintf(
$template,
$this->get_attributes_as_string($attributes),
$this->render_options($this->get_options()),
$this->render_description()
);
}
public function get_no_result(): string
{
return $this->no_result;
}
}