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<?php

namespace Drupal\Tests\metatag\Functional;

use Drupal\Core\Cache\Cache;
use Drupal\Core\StringTranslation\StringTranslationTrait;
use Drupal\Tests\BrowserTestBase;
use Drupal\Tests\field_ui\Traits\FieldUiTestTrait;

/**
 * Base class for ensuring that the Metatag field works correctly.
 */
abstract class MetatagFieldTestBase extends BrowserTestBase {

  use FieldUiTestTrait;
  use StringTranslationTrait;

  /**
   * Profile to use.
   *
   * @var string
   */
  protected $profile = 'testing';

  /**
   * {@inheritdoc}
   */
  protected static $modules = [
    // Needed for token handling.
    'token',

    // Needed for the field UI testing.
    'field_ui',

    // Needed to verify that nothing is broken for unsupported entities.
    'contact',

    // The base module.
    'metatag',

    // Some extra custom logic for testing Metatag.
    'metatag_test_tag',

    // Manages the entity type that is being tested.
    'entity_test',
  ];

  /**
   * {@inheritdoc}
   */
  protected $defaultTheme = 'stark';

  /**
   * Admin user.
   *
   * @var \Drupal\Core\Session\AccountInterface
   */
  protected $adminUser;

  /**
   * Basic permissions that all of the entity tests will need.
   *
   * @var array
   */
  protected $basePerms = [
    'access administration pages',
    'administer meta tags',
  ];

  /**
   * Additional permissions needed for this entity type.
   *
   * @var array
   */
  protected $entityPerms = [];

  /**
   * The entity type that is being tested.
   *
   * @var string
   */
  protected $entityType = '';

  /**
   * The formal name for this entity type.
   *
   * @var string
   */
  protected $entityLabel = '';

  /**
   * The entity bundle that is being tested.
   *
   * @var string
   */
  protected $entityBundle = '';

  /**
   * The path to add an object for this entity type.
   *
   * @var string
   */
  protected $entityAddPath = '';

  /**
   * The path to access the field admin for this entity bundle.
   *
   * @var string
   */
  protected $entityFieldAdminPath = '';

  /**
   * Whether or not this entity type supports default meta tag values.
   *
   * @var bool
   */
  protected $entitySupportsDefaults = TRUE;

  /**
   * The label used on the entity form for the 'save' action.
   *
   * @var string
   */
  protected $entitySaveButtonLabel = 'Save';

  /**
   * The name of the primary title or name field for this entity.
   *
   * @var string
   */
  protected $entityTitleField = 'title';

  /**
   * {@inheritdoc}
   */
  protected function setUp(): void {
    parent::setUp();

    // Any additional configuration that's neede for this entity type.
    $this->setUpEntityType();

    // Merge the base permissions with the custom ones for the entity type and
    // create a user with these permissions.
    $all_perms = array_merge($this->basePerms, $this->entityPerms);
    $this->adminUser = $this->drupalCreateUser($all_perms);
    $this->drupalGet('/user/login');
    $this->assertSession()->statusCodeEquals(200);
    $this->drupalLogin($this->adminUser);
  }

  /**
   * Any additional configuration that's needed for this entity type.
   */
  protected function setUpEntityType(): void {}

  /**
   * A list of default values to add to the entity being created.
   *
   * @return array
   *   Default values.
   */
  protected function entityDefaultValues($title = 'Barfoo'): array {
    return [
      $this->entityTitleField . '[0][value]' => $title,
    ];
  }

  /**
   * Add a Metatag field to this entity type.
   */
  protected function addField(): void {
    // Add a metatag field to the entity type test_entity.
    $this->fieldUIAddNewField($this->entityFieldAdminPath, 'metatag', 'Metatag', 'metatag');

    // Clear all settings.
    $this->container->get('entity_field.manager')->clearCachedFieldDefinitions();
  }

  /**
   * Confirm that the global default values work correctly.
   *
   * Specifically when there are no entity or bundle defaults available.
   */
  public function testGlobalDefaultsInheritance() {
    // First we set global defaults.
    $this->drupalGet('admin/config/search/metatag/global');
    $session = $this->assertSession();
    $session->statusCodeEquals(200);
    $global_values = [
      'metatag_test_tag' => 'Global description',
    ];
    $this->submitForm($global_values, 'Save');
    $session->pageTextContains('Saved the Global Metatag defaults.');

    // Add the field to this entity type.
    $this->addField();

    // Now when we create an entity, global defaults are used to fill the form
    // fields.
    $this->drupalGet($this->entityAddPath);
    $session->statusCodeEquals(200);
    $session->fieldValueEquals('field_metatag[0][basic][metatag_test_tag]', $global_values['metatag_test_tag']);
  }

  /**
   * Confirm that the entity default values work correctly.
   */
  public function testEntityDefaultsInheritance() {
    // This test doesn't make sense if the entity doesn't support defaults.
    if (!$this->entitySupportsDefaults) {
      return;
    }

    // Set a global default.
    $this->drupalGet('admin/config/search/metatag/global');
    $session = $this->assertSession();
    $session->statusCodeEquals(200);
    $global_values = [
      'metatag_test_tag' => 'Global description',
    ];
    $this->submitForm($global_values, 'Save');
    $session->pageTextContains(strip_tags('Saved the Global Metatag defaults.'));

    // Set an entity default.
    $this->drupalGet('admin/config/search/metatag/' . $this->entityType);
    $session->statusCodeEquals(200);
    $entity_values = [
      'metatag_test_tag' => 'Entity description',
    ];
    $this->submitForm($entity_values, 'Save');
    $session->pageTextContains(strip_tags("Saved the $this->entityLabel Metatag defaults."));

    // Add the field to this entity type.
    $this->addField();

    // Load the entity form for this entity type.
    $this->drupalGet($this->entityAddPath);
    $session->statusCodeEquals(200);
    $session->pageTextNotContains('Fatal error');

    // If this entity type supports defaults then verify the global default is
    // not present but that the entity default *is* present.
    $session->fieldValueEquals('field_metatag[0][basic][metatag_test_tag]', $entity_values['metatag_test_tag']);
    $session->fieldValueNotEquals('field_metatag[0][basic][metatag_test_tag]', $global_values['metatag_test_tag']);
  }

  /**
   * Confirm that the default values for an entity bundle work.
   *
   * When there is no field for overriding the defaults.
   *
   * @todo Write this.
   */
  public function testBundleDefaultsInheritance() {
  }

  /**
   * Confirm a field can be added to the entity bundle.
   */
  public function testFieldCanBeAdded() {
    $this->drupalGet($this->entityFieldAdminPath . '/fields/add-field');
    $session = $this->assertSession();
    $session->statusCodeEquals(200);
    $session->elementExists('css', 'label:contains("Meta tags")');
  }

  /**
   * Confirm a field can be added to the entity bundle.
   */
  public function testEntityFieldsAvailable() {
    // Add a field to the entity type.
    $this->addField();

    // Load the entity's form.
    $this->drupalGet($this->entityAddPath);
    $session = $this->assertSession();
    $session->statusCodeEquals(200);
    $session->pageTextNotContains('Fatal error');
    $session->fieldExists('field_metatag[0][basic][metatag_test_tag]');
  }

  /**
   * Confirm that the default values load correctly for an entity created.
   *
   * Before the custom field is added.
   */
  public function testEntityFieldValuesOldEntity() {
    // Set a global default.
    $this->drupalGet('admin/config/search/metatag/global');
    $session = $this->assertSession();
    $session->statusCodeEquals(200);
    $global_values = [
      'metatag_test_tag' => 'Global description',
    ];
    $this->submitForm($global_values, 'Save');
    $session->pageTextContains(strip_tags('Saved the Global Metatag defaults.'));

    // Set an entity default if it's supported by the entity type.
    $entity_values = [];
    if ($this->entitySupportsDefaults) {
      $this->drupalGet('admin/config/search/metatag/' . $this->entityType);
      $session->statusCodeEquals(200);
      $entity_values = [
        'metatag_test_tag' => 'Entity description',
      ];
      $this->submitForm($entity_values, 'Save');
      $session->pageTextContains(strip_tags("Saved the $this->entityLabel Metatag defaults."));
    }

    // Load the entity form for this entity type.
    $title = 'Barfoo';
    $this->drupalGet($this->entityAddPath);
    $session->statusCodeEquals(200);
    $session->pageTextNotContains('Fatal error');

    // Allow the fields to be customized if needed.
    $edit = $this->entityDefaultValues($title);

    // Create a new entity object.
    $this->submitForm($edit, $this->entitySaveButtonLabel);
    $entities = \Drupal::entityTypeManager()
      ->getStorage($this->entityType)
      ->loadByProperties([$this->entityTitleField => $title]);
    $this->assertCount(1, $entities, 'Entity was saved');
    $entity = reset($entities);

    // @todo Confirm the values output correctly.
    // Add a field to the entity type.
    $this->addField();

    // Open the 'edit' form for the entity.
    $this->drupalGet($entity->toUrl('edit-form'));
    $session->statusCodeEquals(200);

    // If this entity type supports defaults then verify the global default is
    // not present but that the entity default *is* present.
    if ($this->entitySupportsDefaults) {
      $session->fieldValueNotEquals('field_metatag[0][basic][metatag_test_tag]', $global_values['metatag_test_tag']);
      $session->fieldValueEquals('field_metatag[0][basic][metatag_test_tag]', $entity_values['metatag_test_tag']);
    }
    else {
      // @todo This won't work.
      $session->fieldValueEquals('field_metatag[0][basic][metatag_test_tag]', $global_values['metatag_test_tag']);
    }

    // @todo Confirm the values output correctly.
  }

  /**
   * Confirm that the default values load correctly.
   *
   * For an entity created after the custom field is added.
   */
  public function testEntityFieldValuesNewEntity() {
    // Set a global default.
    $this->drupalGet('admin/config/search/metatag/global');
    $session = $this->assertSession();
    $session->statusCodeEquals(200);
    $global_values = [
      'metatag_test_tag' => 'Global description',
    ];
    $this->submitForm($global_values, 'Save');
    $session->pageTextContains(strip_tags('Saved the Global Metatag defaults.'));

    // Set an entity default if it's supported by the entity type.
    $entity_values = [
      'metatag_test_tag' => 'Entity description',
    ];
    if ($this->entitySupportsDefaults) {
      $this->drupalGet('admin/config/search/metatag/' . $this->entityType);
      $session->statusCodeEquals(200);
      $this->submitForm($entity_values, 'Save');
      $session->pageTextContains(strip_tags("Saved the $this->entityLabel Metatag defaults."));
    }

    // Add a field to the entity type.
    $this->addField();

    // Load the entity form for this entity type.
    $title = 'Barfoo';
    $this->drupalGet($this->entityAddPath);
    $session->statusCodeEquals(200);
    $session->pageTextNotContains('Fatal error');

    // If this entity type supports defaults then verify the global default is
    // not present but that the entity default *is* present.
    if ($this->entitySupportsDefaults) {
      $session->fieldValueNotEquals('field_metatag[0][basic][metatag_test_tag]', $global_values['metatag_test_tag']);
      $session->fieldValueEquals('field_metatag[0][basic][metatag_test_tag]', $entity_values['metatag_test_tag']);
    }
    else {
      $session->fieldValueEquals('field_metatag[0][basic][metatag_test_tag]', $global_values['metatag_test_tag']);
    }

    // Allow the fields to be customized if needed.
    $edit = $this->entityDefaultValues($title);

    // Create a new entity object.
    $this->submitForm($edit, $this->entitySaveButtonLabel);
    $entities = \Drupal::entityTypeManager()
      ->getStorage($this->entityType)
      ->loadByProperties([$this->entityTitleField => $title]);
    $this->assertCount(1, $entities, 'Entity was saved');
    $entity = reset($entities);

    // @todo Confirm the values output correctly.
    // Open the 'edit' form for the entity.
    $this->drupalGet($entity->toUrl('edit-form'));
    $session->statusCodeEquals(200);

    // If this entity type supports defaults then verify the global default is
    // not present but that the entity default *is* present.
    if ($this->entitySupportsDefaults) {
      $session->fieldValueNotEquals('field_metatag[0][basic][metatag_test_tag]', $global_values['metatag_test_tag']);
      $session->fieldValueEquals('field_metatag[0][basic][metatag_test_tag]', $entity_values['metatag_test_tag']);
    }
    else {
      $session->fieldValueEquals('field_metatag[0][basic][metatag_test_tag]', $global_values['metatag_test_tag']);
    }

    // @todo Confirm the values output correctly.
    // Check the output.
    // @todo Test this.
    metatag_generate_entity_all_tags($entity);
    metatag_generate_entity_overrides($entity);
  }

  /**
   * Tests adding and editing values on a given entity type.
   *
   * @todo Finish this.
   */
  public function todoTestEntityField() {
    // Add a field to the entity type.
    $this->addField();

    // Create a test entity.
    $this->drupalGet($this->entityAddPath);
    $session = $this->assertSession();
    $session->statusCodeEquals(200);
    $session->pageTextNotContains('Fatal error');
    $edit = $this->entityDefaultValues() + [
      'field_metatag[0][basic][metatag_test_tag]' => 'Kilimanjaro',
    ];
    $this->submitForm($edit, 'Save');
    $entities = \Drupal::entityTypeManager()
      ->getStorage('entity_test')
      ->loadByProperties([$this->entityTitleField => 'Barfoo']);
    $this->assertCount(1, $entities, 'Entity was saved');
    $entity = reset($entities);

    // Make sure tags that have a field value but no default value still show
    // up.
    $this->drupalGet($entity->toUrl());
    $session->statusCodeEquals(200);
    $elements = $this->cssSelect('meta[name=metatag_test_tag]');
    $this->assertCount(1, $elements, 'Found keywords metatag_test_tag from defaults');
    $this->assertEquals((string) $elements[0]['content'], 'Kilimanjaro', 'Field value for metatag_test_tag found when no default set.');

    // @todo This should not be required, but meta tags does not invalidate
    // cache upon setting globals.
    Cache::invalidateTags(['entity_test:' . $entity->id()]);

    // Update the Global defaults and test them.
    $this->drupalGet('admin/config/search/metatag/global');
    $session->statusCodeEquals(200);
    $values = [
      'metatag_test_tag' => 'Purple monkey dishwasher',
    ];
    $this->submitForm($values, 'Save');
    $session->pageTextContains('Saved the Global Metatag defaults.');
    $this->drupalGet($entity->toUrl());
    $session->statusCodeEquals(200);
    $elements = $this->cssSelect('meta[name=metatag_test_tag]');
    $this->assertCount(1, $elements, 'Found test metatag from defaults');
    $this->assertEquals((string) $elements[0]['content'], $values['metatag_test_tag']);
  }

}