/**
* {@inheritdoc}
*/
public function buildView(BlockView $view, BlockInterface $block, array $options)
{
// merge the passed variables with the existing ones
if (!empty($options['vars'])) {
$view->vars = array_replace($view->vars, $options['vars']);
}
// add the view to itself vars to allow get it using 'block' variable in a rendered, for example TWIG
$view->vars['block'] = $view;
// replace attributes if specified ('attr' variable always exists in a view because it is added by FormView)
if (isset($options['attr'])) {
$view->vars['attr'] = $options['attr'];
}
// add label text and attributes if specified
if (isset($options['label'])) {
$view->vars['label'] = $options['label'];
if (isset($options['label_attr'])) {
$view->vars['label_attr'] = $options['label_attr'];
}
}
// add the translation domain
$view->vars['translation_domain'] = $this->getTranslationDomain($view, $options);
// add core variables to the block view, like id, block type and variables required for rendering engine
$id = $block->getId();
$name = $block->getTypeName();
// the block prefix must contain only letters, numbers and underscores (_)
// due to limitations of block names in TWIG
$uniqueBlockPrefix = '_' . preg_replace('/[^a-z0-9_]+/i', '_', $id);
$blockPrefixes = $block->getTypeHelper()->getTypeNames($name);
$blockPrefixes[] = $uniqueBlockPrefix;
$view->vars['id'] = $id;
$view->vars['block_type'] = $name;
$view->vars['unique_block_prefix'] = $uniqueBlockPrefix;
$view->vars['block_prefixes'] = $blockPrefixes;
$view->vars['cache_key'] = sprintf('_%s_%s', $id, $name);
}
