class OpenDialogCommand

class OpenDialogCommand implements CommandInterface, CommandWithAttachedAssetsInterface {
    use CommandWithAttachedAssetsTrait;
    
    /**
     * The selector of the dialog.
     *
     * @var string
     */
    protected $selector;
    
    /**
     * The title of the dialog.
     *
     * @var string
     */
    protected $title;
    
    /**
     * The content for the dialog.
     *
     * Either a render array or an HTML string.
     *
     * @var string|array
     */
    protected $content;
    
    /**
     * Stores dialog-specific options passed directly to jQuery UI dialogs.
     *
     * Any jQuery UI option can be used.
     *
     * @see http://api.jqueryui.com/dialog.
     *
     * @var array
     */
    protected $dialogOptions;
    
    /**
     * Custom settings passed to Drupal behaviors on the content of the dialog.
     *
     * @var array
     */
    protected $settings;
    
    /**
     * Constructs an OpenDialogCommand object.
     *
     * @param string $selector
     *   The selector of the dialog.
     * @param string $title
     *   The title of the dialog.
     * @param string|array $content
     *   The content that will be placed in the dialog, either a render array
     *   or an HTML string.
     * @param array $dialog_options
     *   (optional) Options to be passed to the dialog implementation. Any
     *   jQuery UI option can be used. See http://api.jqueryui.com/dialog.
     * @param array|null $settings
     *   (optional) Custom settings that will be passed to the Drupal behaviors
     *   on the content of the dialog. If left empty, the settings will be
     *   populated automatically from the current request.
     */
    public function __construct($selector, $title, $content, array $dialog_options = [], $settings = NULL) {
        $title = PlainTextOutput::renderFromHtml($title);
        $dialog_options += [
            'title' => $title,
        ];
        $this->selector = $selector;
        $this->content = $content;
        $this->dialogOptions = $dialog_options;
        $this->settings = $settings;
    }
    
    /**
     * Returns the dialog options.
     *
     * @return array
     */
    public function getDialogOptions() {
        return $this->dialogOptions;
    }
    
    /**
     * Sets the dialog options array.
     *
     * @param array $dialog_options
     *   Options to be passed to the dialog implementation. Any jQuery UI option
     *   can be used. See http://api.jqueryui.com/dialog.
     */
    public function setDialogOptions($dialog_options) {
        $this->dialogOptions = $dialog_options;
    }
    
    /**
     * Sets a single dialog option value.
     *
     * @param string $key
     *   Key of the dialog option. Any jQuery UI option can be used.
     *   See http://api.jqueryui.com/dialog.
     * @param mixed $value
     *   Option to be passed to the dialog implementation.
     */
    public function setDialogOption($key, $value) {
        $this->dialogOptions[$key] = $value;
    }
    
    /**
     * Sets the dialog title (an alias of setDialogOptions).
     *
     * @param string $title
     *   The new title of the dialog.
     */
    public function setDialogTitle($title) {
        $this->setDialogOption('title', $title);
    }
    
    /**
     * Implements \Drupal\Core\Ajax\CommandInterface:render().
     */
    public function render() {
        // For consistency ensure the modal option is set to TRUE or FALSE.
        $this->dialogOptions['modal'] = isset($this->dialogOptions['modal']) && $this->dialogOptions['modal'];
        return [
            'command' => 'openDialog',
            'selector' => $this->selector,
            'settings' => $this->settings,
            'data' => $this->getRenderedContent(),
            'dialogOptions' => $this->dialogOptions,
        ];
    }

}