class EditorUploadImageScaleTest

class EditorUploadImageScaleTest extends BrowserTestBase {
    use TestFileCreationTrait;
    
    /**
     * Modules to enable.
     *
     * @var array
     */
    protected static $modules = [
        'editor',
        'editor_test',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * A user with permission as administer for testing.
     *
     * @var \Drupal\user\Entity\User
     */
    protected $adminUser;
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        // Add text format.
        FilterFormat::create([
            'format' => 'basic_html',
            'name' => 'Basic HTML',
            'weight' => 0,
        ])->save();
        // Set up text editor.
        Editor::create([
            'format' => 'basic_html',
            'editor' => 'unicorn',
            'image_upload' => [
                'status' => TRUE,
                'scheme' => 'public',
                'directory' => 'inline-images',
                'max_size' => '',
                'max_dimensions' => [
                    'width' => NULL,
                    'height' => NULL,
                ],
            ],
        ])->save();
        // Create admin user.
        $this->adminUser = $this->drupalCreateUser([
            'administer filters',
            'use text format basic_html',
        ]);
        $this->drupalLogin($this->adminUser);
    }
    
    /**
     * Tests scaling of inline images.
     */
    public function testEditorUploadImageScale() : void {
        // Generate testing images.
        $testing_image_list = $this->getTestFiles('image');
        // Case 1: no max dimensions set: uploaded image not scaled.
        $test_image = $testing_image_list[0];
        [
            $image_file_width,
            $image_file_height,
        ] = $this->getTestImageInfo($test_image->uri);
        $max_width = NULL;
        $max_height = NULL;
        $this->setMaxDimensions($max_width, $max_height);
        $this->assertSavedMaxDimensions($max_width, $max_height);
        [
            $uploaded_image_file_width,
            $uploaded_image_file_height,
        ] = $this->uploadImage($test_image->uri);
        $this->assertEquals($image_file_width, $uploaded_image_file_width);
        $this->assertEquals($image_file_height, $uploaded_image_file_height);
        $this->assertSession()
            ->pageTextNotContains("The image was resized to fit within the maximum allowed dimensions of {$max_width}x{$max_height} pixels.");
        // Case 2: max width smaller than uploaded image: image scaled down.
        $test_image = $testing_image_list[1];
        [
            $image_file_width,
            $image_file_height,
        ] = $this->getTestImageInfo($test_image->uri);
        $max_width = $image_file_width - 5;
        $max_height = $image_file_height;
        $this->setMaxDimensions($max_width, $max_height);
        $this->assertSavedMaxDimensions($max_width, $max_height);
        [
            $uploaded_image_file_width,
            $uploaded_image_file_height,
        ] = $this->uploadImage($test_image->uri);
        $this->assertEquals($max_width, $uploaded_image_file_width);
        $this->assertEquals($uploaded_image_file_height * ($uploaded_image_file_width / $max_width), $uploaded_image_file_height);
        $this->assertSession()
            ->pageTextContains("The image was resized to fit within the maximum allowed dimensions of {$max_width}x{$max_height} pixels.");
        // Case 3: max height smaller than uploaded image: image scaled down.
        $test_image = $testing_image_list[2];
        [
            $image_file_width,
            $image_file_height,
        ] = $this->getTestImageInfo($test_image->uri);
        $max_width = $image_file_width;
        $max_height = $image_file_height - 5;
        $this->setMaxDimensions($max_width, $max_height);
        $this->assertSavedMaxDimensions($max_width, $max_height);
        [
            $uploaded_image_file_width,
            $uploaded_image_file_height,
        ] = $this->uploadImage($test_image->uri);
        $this->assertEquals($uploaded_image_file_width * ($uploaded_image_file_height / $max_height), $uploaded_image_file_width);
        $this->assertEquals($max_height, $uploaded_image_file_height);
        $this->assertSession()
            ->pageTextContains("The image was resized to fit within the maximum allowed dimensions of {$max_width}x{$max_height} pixels.");
        // Case 4: max dimensions greater than uploaded image: image not scaled.
        $test_image = $testing_image_list[3];
        [
            $image_file_width,
            $image_file_height,
        ] = $this->getTestImageInfo($test_image->uri);
        $max_width = $image_file_width + 5;
        $max_height = $image_file_height + 5;
        $this->setMaxDimensions($max_width, $max_height);
        $this->assertSavedMaxDimensions($max_width, $max_height);
        [
            $uploaded_image_file_width,
            $uploaded_image_file_height,
        ] = $this->uploadImage($test_image->uri);
        $this->assertEquals($image_file_width, $uploaded_image_file_width);
        $this->assertEquals($image_file_height, $uploaded_image_file_height);
        $this->assertSession()
            ->pageTextNotContains("The image was resized to fit within the maximum allowed dimensions of {$max_width}x{$max_height} pixels.");
        // Case 5: only max width dimension was provided and it was smaller than
        // uploaded image: image scaled down.
        $test_image = $testing_image_list[4];
        [
            $image_file_width,
            $image_file_height,
        ] = $this->getTestImageInfo($test_image->uri);
        $max_width = $image_file_width - 5;
        $max_height = NULL;
        $this->setMaxDimensions($max_width, $max_height);
        $this->assertSavedMaxDimensions($max_width, $max_height);
        [
            $uploaded_image_file_width,
            $uploaded_image_file_height,
        ] = $this->uploadImage($test_image->uri);
        $this->assertEquals($max_width, $uploaded_image_file_width);
        $this->assertEquals($uploaded_image_file_height * ($uploaded_image_file_width / $max_width), $uploaded_image_file_height);
        $this->assertSession()
            ->pageTextContains("The image was resized to fit within the maximum allowed width of {$max_width} pixels.");
        // Case 6: only max height dimension was provided and it was smaller than
        // uploaded image: image scaled down.
        $test_image = $testing_image_list[5];
        [
            $image_file_width,
            $image_file_height,
        ] = $this->getTestImageInfo($test_image->uri);
        $max_width = NULL;
        $max_height = $image_file_height - 5;
        $this->setMaxDimensions($max_width, $max_height);
        $this->assertSavedMaxDimensions($max_width, $max_height);
        [
            $uploaded_image_file_width,
            $uploaded_image_file_height,
        ] = $this->uploadImage($test_image->uri);
        $this->assertEquals($uploaded_image_file_width * ($uploaded_image_file_height / $max_height), $uploaded_image_file_width);
        $this->assertEquals($max_height, $uploaded_image_file_height);
        $this->assertSession()
            ->pageTextContains("The image was resized to fit within the maximum allowed height of {$max_height} pixels.");
    }
    
    /**
     * Gets the dimensions of an uploaded image.
     *
     * @param string $uri
     *   The URI of the image.
     *
     * @return array
     *   An array containing the uploaded image's width and height.
     */
    protected function getTestImageInfo($uri) {
        $image_file = $this->container
            ->get('image.factory')
            ->get($uri);
        return [
            (int) $image_file->getWidth(),
            (int) $image_file->getHeight(),
        ];
    }
    
    /**
     * Sets the maximum dimensions and saves the configuration.
     *
     * @param string|int $width
     *   The width of the image.
     * @param string|int $height
     *   The height of the image.
     */
    protected function setMaxDimensions($width, $height) {
        $editor = Editor::load('basic_html');
        $image_upload_settings = $editor->getImageUploadSettings();
        $image_upload_settings['max_dimensions']['width'] = $width;
        $image_upload_settings['max_dimensions']['height'] = $height;
        $editor->setImageUploadSettings($image_upload_settings);
        $editor->save();
    }
    
    /**
     * Uploads an image via the editor dialog.
     *
     * @param string $uri
     *   The URI of the image.
     *
     * @return array
     *   An array containing the uploaded image's width and height.
     */
    protected function uploadImage($uri) {
        $edit = [
            'files[fid]' => \Drupal::service('file_system')->realpath($uri),
        ];
        $this->drupalGet('editor/dialog/image/basic_html');
        $this->drupalGet('editor/dialog/image/basic_html');
        $this->submitForm($edit, 'Upload');
        $uploaded_image_file = $this->container
            ->get('image.factory')
            ->get('public://inline-images/' . basename($uri));
        return [
            (int) $uploaded_image_file->getWidth(),
            (int) $uploaded_image_file->getHeight(),
        ];
    }
    
    /**
     * Asserts whether the saved maximum dimensions equal the ones provided.
     *
     * @param int|null $width
     *   The expected width of the uploaded image.
     * @param int|null $height
     *   The expected height of the uploaded image.
     *
     * @internal
     */
    protected function assertSavedMaxDimensions(?int $width, ?int $height) : void {
        $image_upload_settings = Editor::load('basic_html')->getImageUploadSettings();
        $expected = [
            'width' => $image_upload_settings['max_dimensions']['width'],
            'height' => $image_upload_settings['max_dimensions']['height'],
        ];
        $this->assertEquals($expected['width'], $width, 'Actual width of "' . $width . '" equals the expected width of "' . $expected['width'] . '"');
        $this->assertEquals($expected['height'], $height, 'Actual height of "' . $height . '" equals the expected width of "' . $expected['height'] . '"');
    }

}