--- /dev/null
+<?php
+
+namespace Drupal\system\Form;
+
+use Drupal\Core\Extension\ModuleHandlerInterface;
+use Drupal\Core\Extension\ModuleInstallerInterface;
+use Drupal\Core\Form\FormBase;
+use Drupal\Core\Form\FormStateInterface;
+use Drupal\Core\KeyValueStore\KeyValueStoreExpirableInterface;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
+/**
+ * Provides a form for uninstalling modules.
+ */
+class ModulesUninstallForm extends FormBase {
+
+ /**
+ * The module handler service.
+ *
+ * @var \Drupal\Core\Extension\ModuleHandlerInterface
+ */
+ protected $moduleHandler;
+
+ /**
+ * The module installer service.
+ *
+ * @var \Drupal\Core\Extension\ModuleInstallerInterface
+ */
+ protected $moduleInstaller;
+
+ /**
+ * The expirable key value store.
+ *
+ * @var \Drupal\Core\KeyValueStore\KeyValueStoreExpirableInterface
+ */
+ protected $keyValueExpirable;
+
+ /**
+ * {@inheritdoc}
+ */
+ public static function create(ContainerInterface $container) {
+ return new static(
+ $container->get('module_handler'),
+ $container->get('module_installer'),
+ $container->get('keyvalue.expirable')->get('modules_uninstall')
+ );
+ }
+
+ /**
+ * Constructs a ModulesUninstallForm object.
+ *
+ * @param \Drupal\Core\Extension\ModuleHandlerInterface $module_handler
+ * The module handler.
+ * @param \Drupal\Core\Extension\ModuleInstallerInterface $module_installer
+ * The module installer.
+ * @param \Drupal\Core\KeyValueStore\KeyValueStoreExpirableInterface $key_value_expirable
+ * The key value expirable factory.
+ */
+ public function __construct(ModuleHandlerInterface $module_handler, ModuleInstallerInterface $module_installer, KeyValueStoreExpirableInterface $key_value_expirable) {
+ $this->moduleHandler = $module_handler;
+ $this->moduleInstaller = $module_installer;
+ $this->keyValueExpirable = $key_value_expirable;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function getFormId() {
+ return 'system_modules_uninstall';
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function buildForm(array $form, FormStateInterface $form_state) {
+ // Make sure the install API is available.
+ include_once DRUPAL_ROOT . '/core/includes/install.inc';
+
+ // Get a list of all available modules.
+ $modules = system_rebuild_module_data();
+ $uninstallable = array_filter($modules, function ($module) use ($modules) {
+ return empty($modules[$module->getName()]->info['required']) && $module->status;
+ });
+
+ // Include system.admin.inc so we can use the sort callbacks.
+ $this->moduleHandler->loadInclude('system', 'inc', 'system.admin');
+
+ $form['filters'] = [
+ '#type' => 'container',
+ '#attributes' => [
+ 'class' => ['table-filter', 'js-show'],
+ ],
+ ];
+
+ $form['filters']['text'] = [
+ '#type' => 'search',
+ '#title' => $this->t('Filter modules'),
+ '#title_display' => 'invisible',
+ '#size' => 30,
+ '#placeholder' => $this->t('Filter by name or description'),
+ '#description' => $this->t('Enter a part of the module name or description'),
+ '#attributes' => [
+ 'class' => ['table-filter-text'],
+ 'data-table' => '#system-modules-uninstall',
+ 'autocomplete' => 'off',
+ ],
+ ];
+
+ $form['modules'] = [];
+
+ // Only build the rest of the form if there are any modules available to
+ // uninstall;
+ if (empty($uninstallable)) {
+ return $form;
+ }
+
+ $profile = drupal_get_profile();
+
+ // Sort all modules by their name.
+ uasort($uninstallable, 'system_sort_modules_by_info_name');
+ $validation_reasons = $this->moduleInstaller->validateUninstall(array_keys($uninstallable));
+
+ $form['uninstall'] = ['#tree' => TRUE];
+ foreach ($uninstallable as $module_key => $module) {
+ $name = $module->info['name'] ?: $module->getName();
+ $form['modules'][$module->getName()]['#module_name'] = $name;
+ $form['modules'][$module->getName()]['name']['#markup'] = $name;
+ $form['modules'][$module->getName()]['description']['#markup'] = $this->t($module->info['description']);
+
+ $form['uninstall'][$module->getName()] = [
+ '#type' => 'checkbox',
+ '#title' => $this->t('Uninstall @module module', ['@module' => $name]),
+ '#title_display' => 'invisible',
+ ];
+
+ // If a validator returns reasons not to uninstall a module,
+ // list the reasons and disable the check box.
+ if (isset($validation_reasons[$module_key])) {
+ $form['modules'][$module->getName()]['#validation_reasons'] = $validation_reasons[$module_key];
+ $form['uninstall'][$module->getName()]['#disabled'] = TRUE;
+ }
+ // All modules which depend on this one must be uninstalled first, before
+ // we can allow this module to be uninstalled. (The installation profile
+ // is excluded from this list.)
+ foreach (array_keys($module->required_by) as $dependent) {
+ if ($dependent != $profile && drupal_get_installed_schema_version($dependent) != SCHEMA_UNINSTALLED) {
+ $name = isset($modules[$dependent]->info['name']) ? $modules[$dependent]->info['name'] : $dependent;
+ $form['modules'][$module->getName()]['#required_by'][] = $name;
+ $form['uninstall'][$module->getName()]['#disabled'] = TRUE;
+ }
+ }
+ }
+
+ $form['#attached']['library'][] = 'system/drupal.system.modules';
+ $form['actions'] = ['#type' => 'actions'];
+ $form['actions']['submit'] = [
+ '#type' => 'submit',
+ '#value' => $this->t('Uninstall'),
+ ];
+
+ return $form;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function validateForm(array &$form, FormStateInterface $form_state) {
+ // Form submitted, but no modules selected.
+ if (!array_filter($form_state->getValue('uninstall'))) {
+ $form_state->setErrorByName('', $this->t('No modules selected.'));
+ $form_state->setRedirect('system.modules_uninstall');
+ }
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function submitForm(array &$form, FormStateInterface $form_state) {
+ // Save all the values in an expirable key value store.
+ $modules = $form_state->getValue('uninstall');
+ $uninstall = array_keys(array_filter($modules));
+ $account = $this->currentUser()->id();
+ // Store the values for 6 hours. This expiration time is also used in
+ // the form cache.
+ $this->keyValueExpirable->setWithExpire($account, $uninstall, 6 * 60 * 60);
+
+ // Redirect to the confirm form.
+ $form_state->setRedirect('system.modules_uninstall_confirm');
+ }
+
+}