--- /dev/null
+<?php
+
+namespace Drupal\system\Form;
+
+use Drupal\Component\Utility\Unicode;
+use Drupal\Core\Config\PreExistingConfigException;
+use Drupal\Core\Config\UnmetDependenciesException;
+use Drupal\Core\Access\AccessManagerInterface;
+use Drupal\Core\Extension\Extension;
+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 Drupal\Core\Render\Element;
+use Drupal\Core\Session\AccountInterface;
+use Drupal\user\PermissionHandlerInterface;
+use Drupal\Core\Url;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
+/**
+ * Provides module installation interface.
+ *
+ * The list of modules gets populated by module.info.yml files, which contain
+ * each module's name, description, and information about which modules it
+ * requires. See \Drupal\Core\Extension\InfoParser for info on module.info.yml
+ * descriptors.
+ */
+class ModulesListForm extends FormBase {
+
+ /**
+ * The current user.
+ *
+ * @var \Drupal\Core\Session\AccountInterface
+ */
+ protected $currentUser;
+
+ /**
+ * The module handler service.
+ *
+ * @var \Drupal\Core\Extension\ModuleHandlerInterface
+ */
+ protected $moduleHandler;
+
+ /**
+ * The expirable key value store.
+ *
+ * @var \Drupal\Core\KeyValueStore\KeyValueStoreExpirableInterface
+ */
+ protected $keyValueExpirable;
+
+ /**
+ * The module installer.
+ *
+ * @var \Drupal\Core\Extension\ModuleInstallerInterface
+ */
+ protected $moduleInstaller;
+
+ /**
+ * The permission handler.
+ *
+ * @var \Drupal\user\PermissionHandlerInterface
+ */
+ protected $permissionHandler;
+
+ /**
+ * {@inheritdoc}
+ */
+ public static function create(ContainerInterface $container) {
+ return new static(
+ $container->get('module_handler'),
+ $container->get('module_installer'),
+ $container->get('keyvalue.expirable')->get('module_list'),
+ $container->get('access_manager'),
+ $container->get('current_user'),
+ $container->get('user.permissions')
+ );
+ }
+
+ /**
+ * Constructs a ModulesListForm 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.
+ * @param \Drupal\Core\Access\AccessManagerInterface $access_manager
+ * Access manager.
+ * @param \Drupal\Core\Session\AccountInterface $current_user
+ * The current user.
+ * @param \Drupal\user\PermissionHandlerInterface $permission_handler
+ * The permission handler.
+ */
+ public function __construct(ModuleHandlerInterface $module_handler, ModuleInstallerInterface $module_installer, KeyValueStoreExpirableInterface $key_value_expirable, AccessManagerInterface $access_manager, AccountInterface $current_user, PermissionHandlerInterface $permission_handler) {
+ $this->moduleHandler = $module_handler;
+ $this->moduleInstaller = $module_installer;
+ $this->keyValueExpirable = $key_value_expirable;
+ $this->accessManager = $access_manager;
+ $this->currentUser = $current_user;
+ $this->permissionHandler = $permission_handler;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function getFormId() {
+ return 'system_modules';
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function buildForm(array $form, FormStateInterface $form_state) {
+ require_once DRUPAL_ROOT . '/core/includes/install.inc';
+ $distribution = drupal_install_profile_distribution_name();
+
+ // 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',
+ 'autocomplete' => 'off',
+ ],
+ ];
+
+ // Sort all modules by their names.
+ $modules = system_rebuild_module_data();
+ uasort($modules, 'system_sort_modules_by_info_name');
+
+ // Iterate over each of the modules.
+ $form['modules']['#tree'] = TRUE;
+ foreach ($modules as $filename => $module) {
+ if (empty($module->info['hidden'])) {
+ $package = $module->info['package'];
+ $form['modules'][$package][$filename] = $this->buildRow($modules, $module, $distribution);
+ $form['modules'][$package][$filename]['#parents'] = ['modules', $filename];
+ }
+ }
+
+ // Add a wrapper around every package.
+ foreach (Element::children($form['modules']) as $package) {
+ $form['modules'][$package] += [
+ '#type' => 'details',
+ '#title' => $this->t($package),
+ '#open' => TRUE,
+ '#theme' => 'system_modules_details',
+ '#attributes' => ['class' => ['package-listing']],
+ // Ensure that the "Core" package comes first.
+ '#weight' => $package == 'Core' ? -10 : NULL,
+ ];
+ }
+
+ // If testing modules are shown, collapse the corresponding package by
+ // default.
+ if (isset($form['modules']['Testing'])) {
+ $form['modules']['Testing']['#open'] = FALSE;
+ }
+
+ // Lastly, sort all packages by title.
+ uasort($form['modules'], ['\Drupal\Component\Utility\SortArray', 'sortByTitleProperty']);
+
+ $form['#attached']['library'][] = 'system/drupal.system.modules';
+ $form['actions'] = ['#type' => 'actions'];
+ $form['actions']['submit'] = [
+ '#type' => 'submit',
+ '#value' => $this->t('Install'),
+ '#button_type' => 'primary',
+ ];
+
+ return $form;
+ }
+
+ /**
+ * Builds a table row for the system modules page.
+ *
+ * @param array $modules
+ * The list existing modules.
+ * @param \Drupal\Core\Extension\Extension $module
+ * The module for which to build the form row.
+ * @param $distribution
+ *
+ * @return array
+ * The form row for the given module.
+ */
+ protected function buildRow(array $modules, Extension $module, $distribution) {
+ // Set the basic properties.
+ $row['#required'] = [];
+ $row['#requires'] = [];
+ $row['#required_by'] = [];
+
+ $row['name']['#markup'] = $module->info['name'];
+ $row['description']['#markup'] = $this->t($module->info['description']);
+ $row['version']['#markup'] = $module->info['version'];
+
+ // Generate link for module's help page. Assume that if a hook_help()
+ // implementation exists then the module provides an overview page, rather
+ // than checking to see if the page exists, which is costly.
+ if ($this->moduleHandler->moduleExists('help') && $module->status && in_array($module->getName(), $this->moduleHandler->getImplementations('help'))) {
+ $row['links']['help'] = [
+ '#type' => 'link',
+ '#title' => $this->t('Help'),
+ '#url' => Url::fromRoute('help.page', ['name' => $module->getName()]),
+ '#options' => ['attributes' => ['class' => ['module-link', 'module-link-help'], 'title' => $this->t('Help')]],
+ ];
+ }
+
+ // Generate link for module's permission, if the user has access to it.
+ if ($module->status && $this->currentUser->hasPermission('administer permissions') && $this->permissionHandler->moduleProvidesPermissions($module->getName())) {
+ $row['links']['permissions'] = [
+ '#type' => 'link',
+ '#title' => $this->t('Permissions'),
+ '#url' => Url::fromRoute('user.admin_permissions'),
+ '#options' => ['fragment' => 'module-' . $module->getName(), 'attributes' => ['class' => ['module-link', 'module-link-permissions'], 'title' => $this->t('Configure permissions')]],
+ ];
+ }
+
+ // Generate link for module's configuration page, if it has one.
+ if ($module->status && isset($module->info['configure'])) {
+ $route_parameters = isset($module->info['configure_parameters']) ? $module->info['configure_parameters'] : [];
+ if ($this->accessManager->checkNamedRoute($module->info['configure'], $route_parameters, $this->currentUser)) {
+ $row['links']['configure'] = [
+ '#type' => 'link',
+ '#title' => $this->t('Configure <span class="visually-hidden">the @module module</span>', ['@module' => $module->info['name']]),
+ '#url' => Url::fromRoute($module->info['configure'], $route_parameters),
+ '#options' => [
+ 'attributes' => [
+ 'class' => ['module-link', 'module-link-configure'],
+ ],
+ ],
+ ];
+ }
+ }
+
+ // Present a checkbox for installing and indicating the status of a module.
+ $row['enable'] = [
+ '#type' => 'checkbox',
+ '#title' => $this->t('Install'),
+ '#default_value' => (bool) $module->status,
+ '#disabled' => (bool) $module->status,
+ ];
+
+ // Disable the checkbox for required modules.
+ if (!empty($module->info['required'])) {
+ // Used when displaying modules that are required by the installation profile
+ $row['enable']['#disabled'] = TRUE;
+ $row['#required_by'][] = $distribution . (!empty($module->info['explanation']) ? ' (' . $module->info['explanation'] . ')' : '');
+ }
+
+ // Check the compatibilities.
+ $compatible = TRUE;
+
+ // Initialize an empty array of reasons why the module is incompatible. Add
+ // each reason as a separate element of the array.
+ $reasons = [];
+
+ // Check the core compatibility.
+ if ($module->info['core'] != \Drupal::CORE_COMPATIBILITY) {
+ $compatible = FALSE;
+ $reasons[] = $this->t('This version is not compatible with Drupal @core_version and should be replaced.', [
+ '@core_version' => \Drupal::CORE_COMPATIBILITY,
+ ]);
+ }
+
+ // Ensure this module is compatible with the currently installed version of PHP.
+ if (version_compare(phpversion(), $module->info['php']) < 0) {
+ $compatible = FALSE;
+ $required = $module->info['php'] . (substr_count($module->info['php'], '.') < 2 ? '.*' : '');
+ $reasons[] = $this->t('This module requires PHP version @php_required and is incompatible with PHP version @php_version.', [
+ '@php_required' => $required,
+ '@php_version' => phpversion(),
+ ]);
+ }
+
+ // If this module is not compatible, disable the checkbox.
+ if (!$compatible) {
+ $status = implode(' ', $reasons);
+ $row['enable']['#disabled'] = TRUE;
+ $row['description']['#markup'] = $status;
+ $row['#attributes']['class'][] = 'incompatible';
+ }
+
+ // If this module requires other modules, add them to the array.
+ foreach ($module->requires as $dependency => $version) {
+ if (!isset($modules[$dependency])) {
+ $row['#requires'][$dependency] = $this->t('@module (<span class="admin-missing">missing</span>)', ['@module' => Unicode::ucfirst($dependency)]);
+ $row['enable']['#disabled'] = TRUE;
+ }
+ // Only display visible modules.
+ elseif (empty($modules[$dependency]->hidden)) {
+ $name = $modules[$dependency]->info['name'];
+ // Disable the module's checkbox if it is incompatible with the
+ // dependency's version.
+ if ($incompatible_version = drupal_check_incompatibility($version, str_replace(\Drupal::CORE_COMPATIBILITY . '-', '', $modules[$dependency]->info['version']))) {
+ $row['#requires'][$dependency] = $this->t('@module (<span class="admin-missing">incompatible with</span> version @version)', [
+ '@module' => $name . $incompatible_version,
+ '@version' => $modules[$dependency]->info['version'],
+ ]);
+ $row['enable']['#disabled'] = TRUE;
+ }
+ // Disable the checkbox if the dependency is incompatible with this
+ // version of Drupal core.
+ elseif ($modules[$dependency]->info['core'] != \Drupal::CORE_COMPATIBILITY) {
+ $row['#requires'][$dependency] = $this->t('@module (<span class="admin-missing">incompatible with</span> this version of Drupal core)', [
+ '@module' => $name,
+ ]);
+ $row['enable']['#disabled'] = TRUE;
+ }
+ elseif ($modules[$dependency]->status) {
+ $row['#requires'][$dependency] = $this->t('@module', ['@module' => $name]);
+ }
+ else {
+ $row['#requires'][$dependency] = $this->t('@module (<span class="admin-disabled">disabled</span>)', ['@module' => $name]);
+ }
+ }
+ }
+
+ // If this module is required by other modules, list those, and then make it
+ // impossible to disable this one.
+ foreach ($module->required_by as $dependent => $version) {
+ if (isset($modules[$dependent]) && empty($modules[$dependent]->info['hidden'])) {
+ if ($modules[$dependent]->status == 1 && $module->status == 1) {
+ $row['#required_by'][$dependent] = $this->t('@module', ['@module' => $modules[$dependent]->info['name']]);
+ $row['enable']['#disabled'] = TRUE;
+ }
+ else {
+ $row['#required_by'][$dependent] = $this->t('@module (<span class="admin-disabled">disabled</span>)', ['@module' => $modules[$dependent]->info['name']]);
+ }
+ }
+ }
+
+ return $row;
+ }
+
+ /**
+ * Helper function for building a list of modules to install.
+ *
+ * @param \Drupal\Core\Form\FormStateInterface $form_state
+ * The current state of the form.
+ *
+ * @return array
+ * An array of modules to install and their dependencies.
+ */
+ protected function buildModuleList(FormStateInterface $form_state) {
+ // Build a list of modules to install.
+ $modules = [
+ 'install' => [],
+ 'dependencies' => [],
+ 'experimental' => [],
+ ];
+
+ $data = system_rebuild_module_data();
+ foreach ($data as $name => $module) {
+ // If the module is installed there is nothing to do.
+ if ($this->moduleHandler->moduleExists($name)) {
+ continue;
+ }
+ // Required modules have to be installed.
+ if (!empty($module->required)) {
+ $modules['install'][$name] = $module->info['name'];
+ }
+ // Selected modules should be installed.
+ elseif (($checkbox = $form_state->getValue(['modules', $name], FALSE)) && $checkbox['enable']) {
+ $modules['install'][$name] = $data[$name]->info['name'];
+ // Identify experimental modules.
+ if ($data[$name]->info['package'] == 'Core (Experimental)') {
+ $modules['experimental'][$name] = $data[$name]->info['name'];
+ }
+ }
+ }
+
+ // Add all dependencies to a list.
+ while (list($module) = each($modules['install'])) {
+ foreach (array_keys($data[$module]->requires) as $dependency) {
+ if (!isset($modules['install'][$dependency]) && !$this->moduleHandler->moduleExists($dependency)) {
+ $modules['dependencies'][$module][$dependency] = $data[$dependency]->info['name'];
+ $modules['install'][$dependency] = $data[$dependency]->info['name'];
+
+ // Identify experimental modules.
+ if ($data[$dependency]->info['package'] == 'Core (Experimental)') {
+ $modules['experimental'][$dependency] = $data[$dependency]->info['name'];
+ }
+ }
+ }
+ }
+
+ // Make sure the install API is available.
+ include_once DRUPAL_ROOT . '/core/includes/install.inc';
+
+ // Invoke hook_requirements('install'). If failures are detected, make
+ // sure the dependent modules aren't installed either.
+ foreach (array_keys($modules['install']) as $module) {
+ if (!drupal_check_module($module)) {
+ unset($modules['install'][$module]);
+ unset($modules['experimental'][$module]);
+ foreach (array_keys($data[$module]->required_by) as $dependent) {
+ unset($modules['install'][$dependent]);
+ unset($modules['dependencies'][$dependent]);
+ }
+ }
+ }
+
+ return $modules;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function submitForm(array &$form, FormStateInterface $form_state) {
+ // Retrieve a list of modules to install and their dependencies.
+ $modules = $this->buildModuleList($form_state);
+
+ // Redirect to a confirmation form if needed.
+ if (!empty($modules['experimental']) || !empty($modules['dependencies'])) {
+
+ $route_name = !empty($modules['experimental']) ? 'system.modules_list_experimental_confirm' : 'system.modules_list_confirm';
+ // Write the list of changed module states into a key value store.
+ $account = $this->currentUser()->id();
+ $this->keyValueExpirable->setWithExpire($account, $modules, 60);
+
+ // Redirect to the confirmation form.
+ $form_state->setRedirect($route_name);
+
+ // We can exit here because at least one modules has dependencies
+ // which we have to prompt the user for in a confirmation form.
+ return;
+ }
+
+ // Install the given modules.
+ if (!empty($modules['install'])) {
+ try {
+ $this->moduleInstaller->install(array_keys($modules['install']));
+ $module_names = array_values($modules['install']);
+ drupal_set_message($this->formatPlural(count($module_names), 'Module %name has been enabled.', '@count modules have been enabled: %names.', [
+ '%name' => $module_names[0],
+ '%names' => implode(', ', $module_names),
+ ]));
+ }
+ catch (PreExistingConfigException $e) {
+ $config_objects = $e->flattenConfigObjects($e->getConfigObjects());
+ drupal_set_message(
+ $this->formatPlural(
+ count($config_objects),
+ 'Unable to install @extension, %config_names already exists in active configuration.',
+ 'Unable to install @extension, %config_names already exist in active configuration.',
+ [
+ '%config_names' => implode(', ', $config_objects),
+ '@extension' => $modules['install'][$e->getExtension()]
+ ]),
+ 'error'
+ );
+ return;
+ }
+ catch (UnmetDependenciesException $e) {
+ drupal_set_message(
+ $e->getTranslatedMessage($this->getStringTranslation(), $modules['install'][$e->getExtension()]),
+ 'error'
+ );
+ return;
+ }
+ }
+ }
+
+}