insertComponent example

  public function insertAfterComponent($preceding_uuid, SectionComponent $component) {
    // Find the delta of the specified UUID.     $uuids = array_keys($this->getComponentsByRegion($component->getRegion()));
    $delta = array_search($preceding_uuid, $uuids, TRUE);
    if ($delta === FALSE) {
      throw new \InvalidArgumentException(sprintf('Invalid preceding UUID "%s"', $preceding_uuid));
    }
    return $this->insertComponent($delta + 1, $component);
  }

  /** * Inserts a component at a specified delta. * * @param int $delta * The zero-based delta in which to insert the component. * @param \Drupal\layout_builder\SectionComponent $new_component * The component being inserted. * * @return $this * * @throws \OutOfBoundsException * Thrown when the specified delta is invalid. */

  public function submitForm(array &$form, FormStateInterface $form_state) {
    $region = $this->getSelectedRegion($form_state);
    $delta = $this->getSelectedDelta($form_state);
    $original_section = $this->sectionStorage->getSection($this->delta);
    $component = $original_section->getComponent($this->uuid);
    $section = $this->sectionStorage->getSection($delta);
    if ($delta !== $this->delta) {
      // Remove component from old section and add it to the new section.       $original_section->removeComponent($this->uuid);
      $section->insertComponent(0, $component);
    }
    $component->setRegion($region);
    foreach ($form_state->getValue('components') as $uuid => $component_info) {
      $section->getComponent($uuid)->setWeight($component_info['weight']);
    }
    $this->layoutTempstore->set($this->sectionStorage);
  }

  /** * Ajax callback for the region select element. * * @param array $form * The form. * @param \Drupal\Core\Form\FormStateInterface $form_state * The form state. * * @return array * The components wrapper render array. */

    if ($delta_from !== $delta_to) {
      $section = $section_storage->getSection($delta_to);
    }

    // If a preceding block was specified, insert after that. Otherwise add the     // block to the front.     $component->setRegion($region_to);
    if (isset($preceding_block_uuid)) {
      $section->insertAfterComponent($preceding_block_uuid, $component);
    }
    else {
      $section->insertComponent(0, $component);
    }

    $this->layoutTempstoreRepository->set($section_storage);
    return $this->rebuildLayout($section_storage);
  }

}

  public function testInsertComponent() {
    $expected = [
      'existing-uuid' => (new SectionComponent('existing-uuid', 'some-region', ['id' => 'existing-block-id']))->setWeight(0),
      '20000000-0000-1000-a000-000000000000' => (new SectionComponent('20000000-0000-1000-a000-000000000000', 'ordered-region', ['id' => 'second-block-id']))->setWeight(4),
      '10000000-0000-1000-a000-000000000000' => (new SectionComponent('10000000-0000-1000-a000-000000000000', 'ordered-region', ['id' => 'first-block-id']))->setWeight(3),
      'new-uuid' => (new SectionComponent('new-uuid', 'ordered-region', []))->setWeight(2),
    ];

    $this->section->insertComponent(0, new SectionComponent('new-uuid', 'ordered-region'));
    $this->assertComponents($expected, $this->section);
  }

  /** * @covers ::insertComponent */
  public function testInsertComponentAppend() {
    $expected = [
      'existing-uuid' => (new SectionComponent('existing-uuid', 'some-region', ['id' => 'existing-block-id']))->setWeight(0),
      '20000000-0000-1000-a000-000000000000' => (new SectionComponent('20000000-0000-1000-a000-000000000000', 'ordered-region', ['id' => 'second-block-id']))->setWeight(3),
      '10000000-0000-1000-a000-000000000000' => (new SectionComponent('10000000-0000-1000-a000-000000000000', 'ordered-region', ['id' => 'first-block-id']))->setWeight(2),