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',
    ];
    
    /**
     * Modules to enable.
     *
     * @var array
     */
    public 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() {
        // Show the master display so the override selection is shown.
        \Drupal::configFactory()->getEditable('views.settings')
            ->set('ui.show.master_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->drupalPostForm('admin/structure/views/nojs/display/test_view/default/pager', $edit, t('Apply'));
        $this->assertFieldByXPath('//input[@name="pager_options[items_per_page]" and @type="number" and @min="0"]', 10, '"Items per page" field was found.');
        $this->assertFieldByXPath('//input[@name="pager_options[offset]" and @type="number" and @min="0"]', 0, '"Offset" field was found.');
        $edit = [
            'pager[type]' => 'none',
        ];
        $this->drupalPostForm('admin/structure/views/nojs/display/test_view/default/pager', $edit, t('Apply'));
        $this->assertFieldByXPath('//input[@name="pager_options[offset]" and @type="number" and @min="0"]', 0, '"Offset" field was found.');
        $edit = [
            'pager[type]' => 'full',
        ];
        $this->drupalPostForm('admin/structure/views/nojs/display/test_view/default/pager', $edit, t('Apply'));
        $this->assertFieldByXPath('//input[@name="pager_options[items_per_page]" and @type="number" and @min="0"]', 10, '"Items to display" field was found.');
        $this->assertFieldByXPath('//input[@name="pager_options[offset]" and @type="number" and @min="0"]', 0, '"Offset" field was found.');
        $this->assertFieldByXPath('//input[@name="pager_options[id]" and @type="number" and @min="0"]', 0, '"Pager ID" field was found.');
        $this->assertFieldByXPath('//input[@name="pager_options[total_pages]" and @type="number" and @min="0"]', '', '"Number of pages" field was found.');
        $this->assertFieldByXPath('//input[@name="pager_options[quantity]" and @type="number" and @min="0"]', 9, '"Number of pager links" field was found.');
        $edit = [
            'pager_options[items_per_page]' => 20,
        ];
        $this->drupalPostForm('admin/structure/views/nojs/display/test_view/default/pager_options', $edit, t('Apply'));
        $this->assertText('20 items');
        // Change type and check whether the type is new type is stored.
        $edit = [
            'pager[type]' => 'mini',
        ];
        $this->drupalPostForm('admin/structure/views/nojs/display/test_view/default/pager', $edit, t('Apply'));
        $this->drupalGet('admin/structure/views/view/test_view/edit');
        $this->assertText('Mini', 'Changed pager plugin, should change some text');
        // 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->drupalPostForm('admin/structure/views/nojs/display/test_store_pager_settings/default/pager', $edit, t('Apply'));
        $this->drupalGet('admin/structure/views/view/test_store_pager_settings/edit');
        $this->assertText('Full');
        $edit = [
            'pager_options[items_per_page]' => 20,
        ];
        $this->drupalPostForm('admin/structure/views/nojs/display/test_store_pager_settings/default/pager_options', $edit, t('Apply'));
        $this->assertText('20 items');
        // add new display and test the settings again, by override it.
        $edit = [];
        // Add a display and override the pager settings.
        $this->drupalPostForm('admin/structure/views/view/test_store_pager_settings/edit', $edit, t('Add Page'));
        $edit = [
            'override[dropdown]' => 'page_1',
        ];
        $this->drupalPostForm('admin/structure/views/nojs/display/test_store_pager_settings/page_1/pager', $edit, t('Apply'));
        $edit = [
            'pager[type]' => 'mini',
        ];
        $this->drupalPostForm('admin/structure/views/nojs/display/test_store_pager_settings/page_1/pager', $edit, t('Apply'));
        $this->drupalGet('admin/structure/views/view/test_store_pager_settings/edit/page_1');
        $this->assertText('Mini', 'Changed pager plugin, should change some text');
        $edit = [
            'pager_options[items_per_page]' => 10,
        ];
        $this->drupalPostForm('admin/structure/views/nojs/display/test_store_pager_settings/default/pager_options', $edit, t('Apply'));
        $this->assertText('10 items', 'The default value has been changed.');
        $this->drupalGet('admin/structure/views/view/test_store_pager_settings/edit/page_1');
        $this->assertText('20 items', 'The original value remains unchanged.');
        // 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->assertFieldByName('override[dropdown]', 'page_1', 'The override element is displayed on plugin selection form.');
        $this->drupalGet('admin/structure/views/nojs/display/test_store_pager_settings/page_1/pager_options');
        $this->assertNoFieldByName('override[dropdown]', NULL, 'The override element is not displayed on plugin settings form.');
        $this->assertFieldByXPath('//input[@name="pager_options[items_per_page]" and @type="number" and @min="0"]', 20, '"Items per page" field was found.');
        $this->assertFieldByXPath('//input[@name="pager_options[offset]" and @type="number" and @min="0"]', 0, '"Offset" field was found.');
        $this->assertFieldByXPath('//input[@name="pager_options[id]" and @type="number" and @min="0"]', 0, '"Pager ID" field was found.');
        $this->assertFieldByXPath('//input[@name="pager_options[total_pages]" and @type="number" and @min="0"]', '', '"Number of pages" field was found.');
    }
    
    /**
     * Tests the none-pager-query.
     */
    public function testNoLimit() {
        // 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 a 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());
        $this->assertEqual($view->pager
            ->getItemsPerPage(), 0);
    }
    public function testViewTotalRowsWithoutPager() {
        $this->drupalCreateContentType([
            'type' => 'page',
        ]);
        for ($i = 0; $i < 23; $i++) {
            $this->drupalCreateNode();
        }
        $view = Views::getView('test_pager_none');
        $view->get_total_rows = TRUE;
        $this->executeView($view);
        $this->assertEqual($view->total_rows, 23, "'total_rows' is calculated when pager type is 'none' and 'get_total_rows' is TRUE.");
    }
    
    /**
     * Tests the some pager plugin.
     */
    public function testLimit() {
        // 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 a 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() {
        // 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 a 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 a 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);
        $this->assertEqual($view->pager
            ->getItemsPerPage(), 0);
        $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',
        ]);
    }
    
    /**
     * Tests rendering with NULL pager.
     */
    public function testRenderNullPager() {
        // 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();
        $output = \Drupal::service('renderer')->renderRoot($output);
        $this->assertEqual(preg_match('/<ul class="pager">/', $output), 0, 'The pager is not rendered.');
    }
    
    /**
     * Test the api functions on the view object.
     */
    public function testPagerApi() {
        $view = Views::getView('test_pager_full');
        $view->setDisplay();
        // On the first round don't initialize the pager.
        $this->assertEqual($view->getItemsPerPage(), NULL, '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);
        $this->assertEqual($view->getItemsPerPage(), $rand_number, 'Make sure getItemsPerPage uses the settings of setItemsPerPage.');
        $this->assertEqual($view->getOffset(), NULL, 'If the pager is not initialized and no manual override there is no offset.');
        $rand_number = rand(1, 5);
        $view->setOffset($rand_number);
        $this->assertEqual($view->getOffset(), $rand_number, 'Make sure getOffset uses the settings of setOffset.');
        $this->assertEqual($view->getCurrentPage(), NULL, 'If the pager is not initialized and no manual override there is no current page.');
        $rand_number = rand(1, 5);
        $view->setCurrentPage($rand_number);
        $this->assertEqual($view->getCurrentPage(), $rand_number, 'Make sure getCurrentPage uses the settings of set_current_page.');
        $view->destroy();
        // On this round enable the pager.
        $view->initDisplay();
        $view->initQuery();
        $view->initPager();
        $this->assertEqual($view->getItemsPerPage(), 5, '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);
        $this->assertEqual($view->getItemsPerPage(), $rand_number, 'Make sure getItemsPerPage uses the settings of setItemsPerPage.');
        $this->assertEqual($view->getOffset(), 0, '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);
        $this->assertEqual($view->getOffset(), $rand_number, 'Make sure getOffset uses the settings of setOffset.');
        $this->assertEqual($view->getCurrentPage(), 0, '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);
        $this->assertEqual($view->getCurrentPage(), $rand_number, '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);
        $this->assertEqual($view->getCurrentPage(), 0, 'Make sure setCurrentPage always sets a valid page number.');
    }
    
    /**
     * Tests translating the pager using config_translation.
     */
    public function testPagerConfigTranslation() {
        $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->drupalPostForm('admin/structure/views/view/content/translate/nl/edit', $edit, t('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.
            $this->assertRaw($translation);
        }
    }
    
    /**
     * Tests translating the pager using locale.
     */
    public function testPagerLocale() {
        // 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.
            $this->assertRaw($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();
    }

}