--- /dev/null
+<?php
+
+namespace DrupalCodeGenerator\Command\Drupal_8;
+
+use DrupalCodeGenerator\Command\BaseGenerator;
+use DrupalCodeGenerator\Utils;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Question\Question;
+
+/**
+ * Implements d8:hook command.
+ */
+class Hook extends BaseGenerator {
+
+ protected $name = 'd8:hook';
+ protected $description = 'Generates a hook';
+ protected $alias = 'hook';
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function interact(InputInterface $input, OutputInterface $output) {
+ $questions = Utils::defaultQuestions();
+ $questions['hook_name'] = new Question('Hook name');
+ $questions['hook_name']->setValidator(function ($value) {
+ if (!in_array($value, $this->supportedHooks())) {
+ throw new \UnexpectedValueException('The value is not correct class name.');
+ }
+ return $value;
+ });
+ $questions['hook_name']->setAutocompleterValues($this->supportedHooks());
+
+ $vars = $this->collectVars($input, $output, $questions);
+
+ // Most Drupal hooks are situated in a module file but some are not.
+ $special_hooks = [
+ 'install' => [
+ 'install',
+ 'uninstall',
+ 'schema',
+ 'requirements',
+ 'update_N',
+ 'update_last_removed',
+ ],
+ // See views_hook_info().
+ 'views.inc' => [
+ 'views_data',
+ 'views_data_alter',
+ 'views_analyze',
+ 'views_invalidate_cache',
+ 'field_views_data',
+ 'field_views_data_alter',
+ // See \Drupal\views\views::$plugins.
+ 'views_plugins_access_alter',
+ 'views_plugins_area_alter',
+ 'views_plugins_argument_alter',
+ 'views_plugins_argument_default_alter',
+ 'views_plugins_argument_validator_alter',
+ 'views_plugins_cache_alter',
+ 'views_plugins_display_extender_alter',
+ 'views_plugins_display_alter',
+ 'views_plugins_exposed_form_alter',
+ 'views_plugins_field_alter',
+ 'views_plugins_filter_alter',
+ 'views_plugins_join_alter',
+ 'views_plugins_pager_alter',
+ 'views_plugins_query_alter',
+ 'views_plugins_relationship_alter',
+ 'views_plugins_row_alter',
+ 'views_plugins_sort_alter',
+ 'views_plugins_style_alter',
+ 'views_plugins_wizard_alter',
+ ],
+ 'views_execution.inc' => [
+ 'views_query_substitutions',
+ 'views_form_substitutions',
+ 'views_pre_view',
+ 'views_pre_build',
+ 'views_post_build',
+ 'views_pre_execute',
+ 'views_post_execute',
+ 'views_pre_render',
+ 'views_post_render',
+ 'views_query_alter',
+ ],
+ // See system_hook_info().
+ 'tokens.inc' => [
+ 'token_info',
+ 'token_info_alter',
+ 'tokens',
+ 'tokens_alter',
+ ],
+ 'post_update.php' => [
+ 'post_update_N',
+ ],
+ ];
+
+ $file_type = 'module';
+ foreach ($special_hooks as $group => $hooks) {
+ if (in_array($vars['hook_name'], $hooks)) {
+ $file_type = $group;
+ break;
+ }
+ }
+
+ $this->addFile()
+ ->path('{machine_name}.' . $file_type)
+ ->headerTemplate("d8/file-docs/$file_type.twig")
+ ->template('d8/hook/' . $vars['hook_name'] . '.twig')
+ ->action('append')
+ ->headerSize(7);
+ }
+
+ /**
+ * Returns list of supported hooks.
+ */
+ protected function supportedHooks() {
+ return array_map(function ($file) {
+ return pathinfo($file, PATHINFO_FILENAME);
+ }, array_diff(scandir($this->templatePath . '/d8/hook'), ['.', '..']));
+ }
+
+}