class PagerTest

class PagerTest extends ViewTestBase {
    use AssertPageCacheContextsAndTagsTrait;
    
    /**
     * Views used by this test.
     *
     * @var array
     */
    public static $testViews = [
        'test_store_pager_settings',
        'test_pager_none',
        'test_pager_some',
        'test_pager_full',
        'test_view_pager_full_zero_items_per_page',
        'test_view',
        'content',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'node',
        'views_ui',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * String translation storage object.
     *
     * @var \Drupal\locale\StringStorageInterface
     */
    protected $localeStorage;
    
    /**
     * Pagers was sometimes not stored.
     *
     * @see https://www.drupal.org/node/652712
     */
    public function testStorePagerSettings() : void {
        // Show the default display so the override selection is shown.
        \Drupal::configFactory()->getEditable('views.settings')
            ->set('ui.show.default_display', TRUE)
            ->save();
        $admin_user = $this->drupalCreateUser([
            'administer views',
            'administer site configuration',
        ]);
        $this->drupalLogin($admin_user);
        // Test behavior described in
        // https://www.drupal.org/node/652712#comment-2354918.
        $this->drupalGet('admin/structure/views/view/test_view/edit');
        $edit = [
            'pager[type]' => 'some',
        ];
        $this->drupalGet('admin/structure/views/nojs/display/test_view/default/pager');
        $this->submitForm($edit, 'Apply');
        $items_per_page = $this->assertSession()
            ->fieldExists("pager_options[items_per_page]");
        $this->assertSession()
            ->fieldValueEquals("pager_options[items_per_page]", 10);
        $this->assertSame('number', $items_per_page->getAttribute('type'));
        $this->assertEquals(0, $items_per_page->getAttribute('min'));
        $offset = $this->assertSession()
            ->fieldExists("pager_options[offset]");
        $this->assertSession()
            ->fieldValueEquals("pager_options[offset]", 0);
        $this->assertSame('number', $offset->getAttribute('type'));
        $this->assertEquals(0, $offset->getAttribute('min'));
        $edit = [
            'pager[type]' => 'none',
        ];
        $this->drupalGet('admin/structure/views/nojs/display/test_view/default/pager');
        $this->submitForm($edit, 'Apply');
        $offset = $this->assertSession()
            ->fieldExists("pager_options[offset]");
        $this->assertSession()
            ->fieldValueEquals("pager_options[offset]", 0);
        $this->assertSame('number', $offset->getAttribute('type'));
        $this->assertEquals(0, $offset->getAttribute('min'));
        $edit = [
            'pager[type]' => 'full',
        ];
        $this->drupalGet('admin/structure/views/nojs/display/test_view/default/pager');
        $this->submitForm($edit, 'Apply');
        $items_per_page = $this->assertSession()
            ->fieldExists("pager_options[items_per_page]");
        $this->assertSession()
            ->fieldValueEquals("pager_options[items_per_page]", 10);
        $this->assertSame('number', $items_per_page->getAttribute('type'));
        $this->assertEquals(0, $items_per_page->getAttribute('min'));
        $offset = $this->assertSession()
            ->fieldExists("pager_options[offset]");
        $this->assertSession()
            ->fieldValueEquals("pager_options[offset]", 0);
        $this->assertSame('number', $offset->getAttribute('type'));
        $this->assertEquals(0, $offset->getAttribute('min'));
        $pagerHeading = $this->assertSession()
            ->fieldExists("pager_options[pagination_heading_level]");
        $this->assertSession()
            ->fieldValueEquals("pager_options[pagination_heading_level]", 'h4');
        $id = $this->assertSession()
            ->fieldExists("pager_options[id]");
        $this->assertSession()
            ->fieldValueEquals("pager_options[id]", 0);
        $this->assertSame('number', $id->getAttribute('type'));
        $this->assertEquals(0, $id->getAttribute('min'));
        $total_pages = $this->assertSession()
            ->fieldExists("pager_options[total_pages]");
        $this->assertSession()
            ->fieldValueEquals("pager_options[total_pages]", '');
        $this->assertSame('number', $total_pages->getAttribute('type'));
        $this->assertEquals(0, $total_pages->getAttribute('min'));
        $quantity = $this->assertSession()
            ->fieldExists("pager_options[quantity]");
        $this->assertSession()
            ->fieldValueEquals("pager_options[quantity]", 9);
        $this->assertSame('number', $quantity->getAttribute('type'));
        $this->assertEquals(0, $quantity->getAttribute('min'));
        $edit = [
            'pager_options[items_per_page]' => 20,
        ];
        $this->drupalGet('admin/structure/views/nojs/display/test_view/default/pager_options');
        $this->submitForm($edit, 'Apply');
        $this->assertSession()
            ->pageTextContains('20 items');
        // Change type and check whether the type is new type is stored.
        $edit = [
            'pager[type]' => 'mini',
        ];
        $this->drupalGet('admin/structure/views/nojs/display/test_view/default/pager');
        $this->submitForm($edit, 'Apply');
        $this->drupalGet('admin/structure/views/view/test_view/edit');
        $this->assertSession()
            ->pageTextContains('Mini');
        // Test behavior described in
        // https://www.drupal.org/node/652712#comment-2354400.
        $view = Views::getView('test_store_pager_settings');
        // Make it editable in the admin interface.
        $view->save();
        $this->drupalGet('admin/structure/views/view/test_store_pager_settings/edit');
        $edit = [
            'pager[type]' => 'full',
        ];
        $this->drupalGet('admin/structure/views/nojs/display/test_store_pager_settings/default/pager');
        $this->submitForm($edit, 'Apply');
        $this->drupalGet('admin/structure/views/view/test_store_pager_settings/edit');
        $this->assertSession()
            ->pageTextContains('Full');
        $edit = [
            'pager_options[items_per_page]' => 20,
        ];
        $this->drupalGet('admin/structure/views/nojs/display/test_store_pager_settings/default/pager_options');
        $this->submitForm($edit, 'Apply');
        $this->assertSession()
            ->pageTextContains('20 items');
        // Add new display and test the settings again, by override it.
        $edit = [];
        // Add a display and override the pager settings.
        $this->drupalGet('admin/structure/views/view/test_store_pager_settings/edit');
        $this->submitForm($edit, 'Add Page');
        $edit = [
            'override[dropdown]' => 'page_1',
        ];
        $this->drupalGet('admin/structure/views/nojs/display/test_store_pager_settings/page_1/pager');
        $this->submitForm($edit, 'Apply');
        $edit = [
            'pager[type]' => 'mini',
        ];
        $this->drupalGet('admin/structure/views/nojs/display/test_store_pager_settings/page_1/pager');
        $this->submitForm($edit, 'Apply');
        $this->drupalGet('admin/structure/views/view/test_store_pager_settings/edit/page_1');
        $this->assertSession()
            ->pageTextContains('Mini');
        $edit = [
            'pager_options[items_per_page]' => 10,
        ];
        $this->drupalGet('admin/structure/views/nojs/display/test_store_pager_settings/default/pager_options');
        $this->submitForm($edit, 'Apply');
        $this->assertSession()
            ->pageTextContains('10 items');
        $this->drupalGet('admin/structure/views/view/test_store_pager_settings/edit/page_1');
        $this->assertSession()
            ->pageTextContains('20 items');
        // Test that the override element is only displayed on pager plugin selection form.
        $this->drupalGet('admin/structure/views/nojs/display/test_store_pager_settings/page_1/pager');
        $this->assertSession()
            ->fieldValueEquals('override[dropdown]', 'page_1');
        $this->drupalGet('admin/structure/views/nojs/display/test_store_pager_settings/page_1/pager_options');
        $this->assertSession()
            ->fieldNotExists('override[dropdown]');
        $items_per_page = $this->assertSession()
            ->fieldExists("pager_options[items_per_page]");
        $this->assertSession()
            ->fieldValueEquals("pager_options[items_per_page]", 20);
        $this->assertSame('number', $items_per_page->getAttribute('type'));
        $this->assertEquals(0, $items_per_page->getAttribute('min'));
        $offset = $this->assertSession()
            ->fieldExists("pager_options[offset]");
        $this->assertSession()
            ->fieldValueEquals("pager_options[offset]", 0);
        $this->assertSame('number', $offset->getAttribute('type'));
        $this->assertEquals(0, $offset->getAttribute('min'));
        $id = $this->assertSession()
            ->fieldExists("pager_options[id]");
        $this->assertSession()
            ->fieldValueEquals("pager_options[id]", 0);
        $this->assertSame('number', $id->getAttribute('type'));
        $this->assertEquals(0, $id->getAttribute('min'));
        $total_pages = $this->assertSession()
            ->fieldExists("pager_options[total_pages]");
        $this->assertSession()
            ->fieldValueEquals("pager_options[total_pages]", '');
        $this->assertSame('number', $total_pages->getAttribute('type'));
        $this->assertEquals(0, $total_pages->getAttribute('min'));
    }
    
    /**
     * Tests the none-pager-query.
     */
    public function testNoLimit() : void {
        // Create 11 nodes and make sure that everyone is returned.
        // We create 11 nodes, because the default pager plugin had 10 items per page.
        $this->drupalCreateContentType([
            'type' => 'page',
        ]);
        for ($i = 0; $i < 11; $i++) {
            $this->drupalCreateNode();
        }
        $view = Views::getView('test_pager_none');
        $this->executeView($view);
        $this->assertCount(11, $view->result, 'Make sure that every item is returned in the result');
        // Setup and test an offset.
        $view = Views::getView('test_pager_none');
        $view->setDisplay();
        $pager = [
            'type' => 'none',
            'options' => [
                'offset' => 3,
            ],
        ];
        $view->display_handler
            ->setOption('pager', $pager);
        $this->executeView($view);
        $this->assertCount(8, $view->result, 'Make sure that every item beside the first three is returned in the result');
        // Check some public functions.
        $this->assertFalse($view->pager
            ->usePager());
        $this->assertFalse($view->pager
            ->useCountQuery());
        $this->assertEquals(0, $view->pager
            ->getItemsPerPage());
    }
    public function testViewTotalRowsWithoutPager() : void {
        $this->drupalCreateContentType([
            'type' => 'page',
        ]);
        for ($i = 0; $i < 23; $i++) {
            $this->drupalCreateNode();
        }
        $view = Views::getView('test_pager_none');
        $view->get_total_rows = TRUE;
        $this->executeView($view);
        $this->assertEquals(23, $view->total_rows, "'total_rows' is calculated when pager type is 'none' and 'get_total_rows' is TRUE.");
    }
    
    /**
     * Tests the some pager plugin.
     */
    public function testLimit() : void {
        // Create 11 nodes and make sure that everyone is returned.
        // We create 11 nodes, because the default pager plugin had 10 items per page.
        $this->drupalCreateContentType([
            'type' => 'page',
        ]);
        for ($i = 0; $i < 11; $i++) {
            $this->drupalCreateNode();
        }
        $view = Views::getView('test_pager_some');
        $this->executeView($view);
        $this->assertCount(5, $view->result, 'Make sure that only a certain count of items is returned');
        // Setup and test an offset.
        $view = Views::getView('test_pager_some');
        $view->setDisplay();
        $pager = [
            'type' => 'none',
            'options' => [
                'offset' => 8,
                'items_per_page' => 5,
            ],
        ];
        $view->display_handler
            ->setOption('pager', $pager);
        $this->executeView($view);
        $this->assertCount(3, $view->result, 'Make sure that only a certain count of items is returned');
        // Check some public functions.
        $this->assertFalse($view->pager
            ->usePager());
        $this->assertFalse($view->pager
            ->useCountQuery());
    }
    
    /**
     * Tests the normal pager.
     */
    public function testNormalPager() : void {
        // Create 11 nodes and make sure that everyone is returned.
        // We create 11 nodes, because the default pager plugin had 10 items per page.
        $this->drupalCreateContentType([
            'type' => 'page',
        ]);
        for ($i = 0; $i < 11; $i++) {
            $this->drupalCreateNode();
        }
        $view = Views::getView('test_pager_full');
        $this->executeView($view);
        $this->assertCount(5, $view->result, 'Make sure that only a certain count of items is returned');
        // Setup and test an offset.
        $view = Views::getView('test_pager_full');
        $view->setDisplay();
        $pager = [
            'type' => 'full',
            'options' => [
                'offset' => 8,
                'items_per_page' => 5,
            ],
        ];
        $view->display_handler
            ->setOption('pager', $pager);
        $this->executeView($view);
        $this->assertCount(3, $view->result, 'Make sure that only a certain count of items is returned');
        // Test items per page = 0
        $view = Views::getView('test_view_pager_full_zero_items_per_page');
        $this->executeView($view);
        $this->assertCount(11, $view->result, 'All items are return');
        // @todo Test number of pages.
        // Test items per page = 0.
        // Setup and test an offset.
        $view = Views::getView('test_pager_full');
        $view->setDisplay();
        $pager = [
            'type' => 'full',
            'options' => [
                'offset' => 0,
                'items_per_page' => 0,
            ],
        ];
        $view->display_handler
            ->setOption('pager', $pager);
        $this->executeView($view);
        $this->assertEquals(0, $view->pager
            ->getItemsPerPage());
        $this->assertCount(11, $view->result);
        // Test pager cache contexts.
        $this->drupalGet('test_pager_full');
        $this->assertCacheContexts([
            'languages:language_interface',
            'theme',
            'timezone',
            'url.query_args',
            'user.node_grants:view',
        ]);
        // Set "Number of pager links visible" to 1 and check the active page number
        // on the last page.
        $view = Views::getView('test_pager_full');
        $view->setDisplay();
        $pager = [
            'type' => 'full',
            'options' => [
                'items_per_page' => 5,
                'quantity' => 1,
            ],
        ];
        $view->display_handler
            ->setOption('pager', $pager);
        $view->save();
        $this->drupalGet('test_pager_full', [
            'query' => [
                'page' => 2,
            ],
        ]);
        $this->assertEquals('Page 3', $this->assertSession()
            ->elementExists('css', '.pager__items li.is-active')
            ->getText());
        $link = $this->assertSession()
            ->elementExists('css', '.pager__items li.is-active a');
        $this->assertSame('page', $link->getAttribute('aria-current'));
        $this->assertSame('Current page', $link->getAttribute('title'));
    }
    
    /**
     * Tests changing the heading level.
     */
    public function testPagerHeadingLevel() : void {
        // Create 2 nodes and make sure that everyone is returned.
        $this->drupalCreateContentType([
            'type' => 'page',
        ]);
        for ($i = 0; $i < 2; $i++) {
            $this->drupalCreateNode();
        }
        // Set "Pager Heading" to h2 and check that it is correct.
        $view = Views::getView('test_pager_full');
        $view->setDisplay();
        $pager = [
            'type' => 'full',
            'options' => [
                'pagination_heading_level' => 'h2',
                'items_per_page' => 1,
                'quantity' => 1,
            ],
        ];
        $view->display_handler
            ->setOption('pager', $pager);
        $view->save();
        $themes = [
            'stark',
            'olivero',
            'claro',
            'starterkit_theme',
            'stable9',
        ];
        $this->container
            ->get('theme_installer')
            ->install($themes);
        foreach ($themes as $theme) {
            $this->config('system.theme')
                ->set('default', $theme)
                ->save();
            $this->drupalGet('test_pager_full');
            $this->assertEquals('h2', $this->assertSession()
                ->elementExists('css', ".pager .visually-hidden")
                ->getTagName());
        }
    }
    
    /**
     * Tests rendering with NULL pager.
     */
    public function testRenderNullPager() : void {
        // Create 11 nodes and make sure that everyone is returned.
        // We create 11 nodes, because the default pager plugin had 10 items per page.
        $this->drupalCreateContentType([
            'type' => 'page',
        ]);
        for ($i = 0; $i < 11; $i++) {
            $this->drupalCreateNode();
        }
        $view = Views::getView('test_pager_full');
        $this->executeView($view);
        // Force the value again here.
        $view->setAjaxEnabled(TRUE);
        $view->pager = NULL;
        $output = $view->render();
        $output = (string) \Drupal::service('renderer')->renderRoot($output);
        $this->assertStringNotContainsString('<ul class="pager">', $output);
    }
    
    /**
     * Tests the api functions on the view object.
     */
    public function testPagerApi() : void {
        $view = Views::getView('test_pager_full');
        $view->setDisplay();
        // On the first round don't initialize the pager.
        $this->assertNull($view->getItemsPerPage(), 'If the pager is not initialized and no manual override there is no items per page.');
        $rand_number = rand(1, 5);
        $view->setItemsPerPage($rand_number);
        $this->assertEquals($rand_number, $view->getItemsPerPage(), 'Make sure getItemsPerPage uses the settings of setItemsPerPage.');
        $this->assertNull($view->getOffset(), 'If the pager is not initialized and no manual override there is no offset.');
        $rand_number = rand(1, 5);
        $view->setOffset($rand_number);
        $this->assertEquals($rand_number, $view->getOffset(), 'Make sure getOffset uses the settings of setOffset.');
        $this->assertNull($view->getCurrentPage(), 'If the pager is not initialized and no manual override there is no current page.');
        $rand_number = rand(1, 5);
        $view->setCurrentPage($rand_number);
        $this->assertEquals($rand_number, $view->getCurrentPage(), 'Make sure getCurrentPage uses the settings of set_current_page.');
        $view->destroy();
        // On this round enable the pager.
        $view->initDisplay();
        $view->initQuery();
        $view->initPager();
        $this->assertEquals(5, $view->getItemsPerPage(), 'Per default the view has 5 items per page.');
        $rand_number = rand(1, 5);
        $view->setItemsPerPage($rand_number);
        $rand_number = rand(6, 11);
        $view->pager
            ->setItemsPerPage($rand_number);
        $this->assertEquals($rand_number, $view->getItemsPerPage(), 'Make sure getItemsPerPage uses the settings of setItemsPerPage.');
        $this->assertEquals(0, $view->getOffset(), 'Per default a view has a 0 offset.');
        $rand_number = rand(1, 5);
        $view->setOffset($rand_number);
        $rand_number = rand(6, 11);
        $view->pager
            ->setOffset($rand_number);
        $this->assertEquals($rand_number, $view->getOffset(), 'Make sure getOffset uses the settings of setOffset.');
        $this->assertEquals(0, $view->getCurrentPage(), 'Per default the current page is 0.');
        $rand_number = rand(1, 5);
        $view->setCurrentPage($rand_number);
        $rand_number = rand(6, 11);
        $view->pager
            ->setCurrentPage($rand_number);
        $this->assertEquals($rand_number, $view->getCurrentPage(), 'Make sure getCurrentPage uses the settings of set_current_page.');
        // Set an invalid page and make sure the method takes care about it.
        $view->setCurrentPage(-1);
        $this->assertEquals(0, $view->getCurrentPage(), 'Make sure setCurrentPage always sets a valid page number.');
    }
    
    /**
     * Tests translating the pager using config_translation.
     */
    public function testPagerConfigTranslation() : void {
        $view = Views::getView('content');
        $display =& $view->storage
            ->getDisplay('default');
        $display['display_options']['pager']['options']['items_per_page'] = 5;
        $view->save();
        // Enable locale, config_translation and language module.
        $this->container
            ->get('module_installer')
            ->install([
            'locale',
            'language',
            'config_translation',
        ]);
        $this->resetAll();
        $admin_user = $this->drupalCreateUser([
            'access content overview',
            'administer nodes',
            'bypass node access',
            'translate configuration',
        ]);
        $this->drupalLogin($admin_user);
        $langcode = 'nl';
        // Add a default locale storage for this test.
        $this->localeStorage = $this->container
            ->get('locale.storage');
        // Add Dutch language programmatically.
        ConfigurableLanguage::createFromLangcode($langcode)->save();
        $edit = [
            'translation[config_names][views.view.content][display][default][display_options][pager][options][tags][first]' => '« Eerste',
            'translation[config_names][views.view.content][display][default][display_options][pager][options][tags][previous]' => '‹ Vorige',
            'translation[config_names][views.view.content][display][default][display_options][pager][options][tags][next]' => 'Volgende ›',
            'translation[config_names][views.view.content][display][default][display_options][pager][options][tags][last]' => 'Laatste »',
        ];
        $this->drupalGet('admin/structure/views/view/content/translate/nl/edit');
        $this->submitForm($edit, 'Save translation');
        // We create 11 nodes, this will give us 3 pages.
        $this->drupalCreateContentType([
            'type' => 'page',
        ]);
        for ($i = 0; $i < 11; $i++) {
            $this->drupalCreateNode();
        }
        // Go to the second page so we see both previous and next buttons.
        $this->drupalGet('nl/admin/content', [
            'query' => [
                'page' => 1,
            ],
        ]);
        // Translation mapping..
        $labels = [
            '« First' => '« Eerste',
            '‹ Previous' => '‹ Vorige',
            'Next ›' => 'Volgende ›',
            'Last »' => 'Laatste »',
        ];
        foreach ($labels as $label => $translation) {
            // Check if we can find the translation.
            $this->assertSession()
                ->pageTextContains($translation);
        }
    }
    
    /**
     * Tests translating the pager using locale.
     */
    public function testPagerLocale() : void {
        // Enable locale and language module.
        $this->container
            ->get('module_installer')
            ->install([
            'locale',
            'language',
        ]);
        $this->resetAll();
        $langcode = 'nl';
        // Add a default locale storage for this test.
        $this->localeStorage = $this->container
            ->get('locale.storage');
        // Add Dutch language programmatically.
        ConfigurableLanguage::createFromLangcode($langcode)->save();
        // Labels that need translations.
        $labels = [
            '« First' => '« Eerste',
            '‹ Previous' => '‹ Vorige',
            'Next ›' => 'Volgende ›',
            'Last »' => 'Laatste »',
        ];
        foreach ($labels as $label => $translation) {
            // Create source string.
            $source = $this->localeStorage
                ->createString([
                'source' => $label,
            ]);
            $source->save();
            $this->createTranslation($source, $translation, $langcode);
        }
        // We create 11 nodes, this will give us 3 pages.
        $this->drupalCreateContentType([
            'type' => 'page',
        ]);
        for ($i = 0; $i < 11; $i++) {
            $this->drupalCreateNode();
        }
        // Go to the second page so we see both previous and next buttons.
        $this->drupalGet('nl/test_pager_full', [
            'query' => [
                'page' => 1,
            ],
        ]);
        foreach ($labels as $label => $translation) {
            // Check if we can find the translation.
            $this->assertSession()
                ->pageTextContains($translation);
        }
    }
    
    /**
     * Creates single translation for source string.
     */
    protected function createTranslation($source, $translation, $langcode) {
        $values = [
            'lid' => $source->lid,
            'language' => $langcode,
            'translation' => $translation,
        ];
        return $this->localeStorage
            ->createTranslation($values)
            ->save();
    }

}