module_test.module

<?php


/**
 * @file
 * Test module.
 */
use Drupal\Core\Extension\Extension;

/**
 * Implements hook_system_info_alter().
 *
 * Manipulate module dependencies to test dependency chains.
 */
function module_test_system_info_alter(&$info, Extension $file, $type) {
    if (\Drupal::state()->get('module_test.dependency') == 'missing dependency') {
        if ($file->getName() == 'dblog') {
            // Make dblog module depend on config.
            $info['dependencies'][] = 'config';
        }
        elseif ($file->getName() == 'config') {
            // Make config module depend on a non-existing module.
            $info['dependencies'][] = 'foo';
        }
    }
    elseif (\Drupal::state()->get('module_test.dependency') == 'dependency') {
        if ($file->getName() == 'dblog') {
            // Make dblog module depend on config.
            $info['dependencies'][] = 'config';
        }
        elseif ($file->getName() == 'config') {
            // Make config module depend on help module.
            $info['dependencies'][] = 'help';
        }
        elseif ($file->getName() == 'entity_test') {
            // Make entity test module depend on help module.
            $info['dependencies'][] = 'help';
        }
    }
    elseif (\Drupal::state()->get('module_test.dependency') == 'version dependency') {
        if ($file->getName() == 'dblog') {
            // Make dblog module depend on config.
            $info['dependencies'][] = 'config';
        }
        elseif ($file->getName() == 'config') {
            // Make config module depend on a specific version of help module.
            $info['dependencies'][] = 'help (1.x)';
        }
        elseif ($file->getName() == 'help') {
            // Set help module to a version compatible with the above.
            $info['version'] = '8.x-1.0';
        }
    }
    if ($file->getName() == 'stark' && $type == 'theme') {
        $info['regions']['test_region'] = 'Test region';
    }
}

/**
 * Implements hook_hook_info().
 */
function module_test_hook_info() {
    $hooks['test_hook'] = [
        'group' => 'file',
    ];
    return $hooks;
}

/**
 * Load function used by module_test_hook_dynamic_loading_invoke_all_during_load().
 *
 * @see module_test_menu()
 */
function module_test_load($param) {
    $result = \Drupal::moduleHandler()->invokeAll('test_hook');
    return $result[$param];
}

/**
 * Implements hook_modules_installed().
 */
function module_test_modules_installed($modules) {
    // Record the ordered list of modules that were passed in to this hook so we
    // can check that the modules were enabled in the correct sequence.
    \Drupal::state()->set('module_test.install_order', $modules);
}

/**
 * Implements hook_modules_uninstalled().
 */
function module_test_modules_uninstalled($modules) {
    // Record the ordered list of modules that were passed in to this hook so we
    // can check that the modules were uninstalled in the correct sequence.
    \Drupal::state()->set('module_test.uninstall_order', $modules);
}

/**
 * Implements hook_module_implements_alter().
 *
 * @see module_test_altered_test_hook()
 * @see \Drupal\system\Tests\Module\ModuleImplementsAlterTest::testModuleImplementsAlter()
 */
function module_test_module_implements_alter(&$implementations, $hook) {
    if ($hook === 'altered_test_hook') {
        // Add a hook implementation, that will be found in
        // module_test.implementation.inc.
        $implementations['module_test'] = 'implementations';
    }
    if ($hook === 'unimplemented_test_hook') {
        // Add the non-existing function module_test_unimplemented_test_hook(). This
        // should cause an exception to be thrown in
        // \Drupal\Core\Extension\ModuleHandler::buildImplementationInfo('unimplemented_test_hook').
        $implementations['module_test'] = FALSE;
    }
}