class SetCustomize

class SetCustomize extends EntityForm {
    
    /**
     * The entity being used by this form.
     *
     * @var \Drupal\shortcut\ShortcutSetInterface
     */
    protected $entity;
    
    /**
     * {@inheritdoc}
     */
    public function form(array $form, FormStateInterface $form_state) {
        $form = parent::form($form, $form_state);
        $form['shortcuts'] = [
            '#tree' => TRUE,
            '#weight' => -20,
        ];
        $form['shortcuts']['links'] = [
            '#type' => 'table',
            '#header' => [
                $this->t('Name'),
                $this->t('Weight'),
                $this->t('Operations'),
            ],
            '#empty' => $this->t('No shortcuts available. <a href=":link">Add a shortcut</a>', [
                ':link' => Url::fromRoute('shortcut.link_add', [
                    'shortcut_set' => $this->entity
                        ->id(),
                ])
                    ->toString(),
            ]),
            '#attributes' => [
                'id' => 'shortcuts',
            ],
            '#tabledrag' => [
                [
                    'action' => 'order',
                    'relationship' => 'sibling',
                    'group' => 'shortcut-weight',
                ],
            ],
        ];
        foreach ($this->entity
            ->getShortcuts() as $shortcut) {
            $id = $shortcut->id();
            $url = $shortcut->getUrl();
            if (!$url->access()) {
                continue;
            }
            $form['shortcuts']['links'][$id]['#attributes']['class'][] = 'draggable';
            $form['shortcuts']['links'][$id]['name'] = [
                '#type' => 'link',
                '#title' => $shortcut->getTitle(),
                '#url' => $url,
                '#options' => $url->getOptions(),
            ];
            $form['shortcuts']['links'][$id]['#weight'] = $shortcut->getWeight();
            $form['shortcuts']['links'][$id]['weight'] = [
                '#type' => 'weight',
                '#title' => $this->t('Weight for @title', [
                    '@title' => $shortcut->getTitle(),
                ]),
                '#title_display' => 'invisible',
                '#default_value' => $shortcut->getWeight(),
                '#attributes' => [
                    'class' => [
                        'shortcut-weight',
                    ],
                ],
            ];
            $links['edit'] = [
                'title' => $this->t('Edit'),
                'url' => $shortcut->toUrl(),
            ];
            $links['delete'] = [
                'title' => $this->t('Delete'),
                'url' => $shortcut->toUrl('delete-form'),
            ];
            $form['shortcuts']['links'][$id]['operations'] = [
                '#type' => 'operations',
                '#links' => $links,
                '#access' => $url->access(),
            ];
        }
        return $form;
    }
    
    /**
     * {@inheritdoc}
     */
    protected function actions(array $form, FormStateInterface $form_state) {
        // Only includes a Save action for the entity, no direct Delete button.
        return [
            'submit' => [
                '#type' => 'submit',
                '#value' => $this->t('Save'),
                '#access' => (bool) Element::getVisibleChildren($form['shortcuts']['links']),
                '#submit' => [
                    '::submitForm',
                    '::save',
                ],
            ],
        ];
    }
    
    /**
     * {@inheritdoc}
     */
    public function save(array $form, FormStateInterface $form_state) {
        foreach ($this->entity
            ->getShortcuts() as $shortcut) {
            $weight = $form_state->getValue([
                'shortcuts',
                'links',
                $shortcut->id(),
                'weight',
            ]);
            $shortcut->setWeight($weight);
            $shortcut->save();
        }
        $this->messenger()
            ->addStatus($this->t('The shortcut set has been updated.'));
    }

}