import Component from 'flarum/Component';
import Button from 'flarum/components/Button';
import listItems from 'flarum/helpers/listItems';
import extract from 'flarum/utils/extract';

/**
 * The `Alert` component represents an alert box, which contains a message,
 * some controls, and may be dismissible.
 *
 * The alert may have the following special props:
 *
 * - `type` The type of alert this is. Will be used to give the alert a class
 *   name of `Alert--{type}`.
 * - `controls` An array of controls to show in the alert.
 * - `dismissible` Whether or not the alert can be dismissed.
 * - `ondismiss` A callback to run when the alert is dismissed.
 *
 * All other props will be assigned as attributes on the alert element.
 */
export default class Alert extends Component {
  view() {
    const attrs = Object.assign({}, this.props);

    const type = extract(attrs, 'type');
    attrs.className = 'Alert Alert--' + type + ' ' + (attrs.className || '');

    const children = extract(attrs, 'children');
    const controls = extract(attrs, 'controls') || [];

    // If the alert is meant to be dismissible (which is the case by default),
    // then we will create a dismiss button to append as the final control in
    // the alert.
    const dismissible = extract(attrs, 'dismissible');
    const ondismiss = extract(attrs, 'ondismiss');
    const dismissControl = [];

    if (dismissible || dismissible === undefined) {
      dismissControl.push(
        <Button
          icon="times"
          className="Button Button--link Button--icon Alert-dismiss"
          onclick={ondismiss}/>
      );
    }

    return (
      <div {...attrs}>
        <span className="Alert-body">
          {children}
        </span>
        <ul className="Alert-controls">
          {listItems(controls.concat(dismissControl))}
        </ul>
      </div>
    );
  }
}