class ExifSettingsForm

class ExifSettingsForm extends ConfigFormBase implements ContainerInjectionInterface {
    use StringTranslationTrait;
    
    /**
     * The entity manager.
     *
     * @var \Drupal\Core\Entity\EntityTypeManagerInterface
     */
    protected $entityTypeManager;
    
    /**
     * Constructs the ExifSettingsForm object.
     *
     * @param \Drupal\Core\Config\ConfigFactoryInterface $configFactory
     *   The configuration factory.
     * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
     *   The entity manager.
     * @param \Drupal\Core\Extension\ModuleHandlerInterface $module_handler
     *   The module handler service.
     * @param \Drupal\Core\Entity\EntityTypeRepositoryInterface $repository
     *   Service that provides helper methods for loading entity types.
     */
    public function __construct(ConfigFactoryInterface $configFactory, EntityTypeManagerInterface $entity_type_manager, ModuleHandlerInterface $module_handler, EntityTypeRepositoryInterface $repository) {
        ConfigFormBase::__construct($configFactory);
        $this->entityTypeManager = $entity_type_manager;
        $this->moduleHandler = $module_handler;
        $this->repository = $repository;
    }
    
    /**
     * {@inheritdoc}
     */
    public static function create(ContainerInterface $container) {
        return new static($container->get('config.factory'), $container->get('entity_type.manager'), $container->get('module_handler'), $container->get('entity_type.repository'));
    }
    
    /**
     * {@inheritdoc}
     */
    public function getFormId() {
        return 'exif_settings';
    }
    
    /**
     * {@inheritdoc}
     */
    protected function getEditableConfigNames() {
        return [
            'exif.settings',
        ];
    }
    
    /**
     * {@inheritdoc}
     */
    public function buildForm(array $form, FormStateInterface $form_state) {
        $config = $this->config('exif.settings');
        $form['exif'] = [
            '#type' => 'vertical_tabs',
            '#title' => $this->t('Image metadata settings'),
        ];
        $form['global'] = [
            '#type' => 'details',
            '#title' => $this->t('Global Settings'),
            '#group' => 'exif',
        ];
        $form['global']['granularity'] = [
            '#type' => 'select',
            '#title' => $this->t('Granularity'),
            '#options' => [
                0 => $this->t('Default'),
                1 => 'Day',
            ],
            '#default_value' => $config->get('granularity'),
            '#description' => $this->t('If a timestamp is selected (for example the date the picture was taken), you can specify here how granular the timestamp should be. If you select default it will just take whatever is available in the picture. If you select Day, the Date saved will look something like 13-12-2008. This can be useful if you want to use some kind of grouping on the data.'),
        ];
        $form['fieldname'] = [
            '#type' => 'markup',
            '#value' => "My Value Goes Here",
        ];
        $form['node'] = [
            '#type' => 'details',
            '#title' => $this->t('Content types'),
            '#group' => 'exif',
        ];
        $all_nodetypes = $this->entityTypeManager
            ->getStorage('node_type')
            ->loadMultiple();
        $all_nt = [];
        foreach ($all_nodetypes as $item) {
            $all_nt[$item->id()] = $item->label();
        }
        $form['node']['nodetypes'] = [
            '#type' => 'checkboxes',
            '#title' => $this->t('Nodetypes'),
            '#options' => $all_nt,
            '#default_value' => $config->get('nodetypes'),
            '#description' => $this->t('Select nodetypes which should be checked for iptc & exif data.'),
        ];
        // The old way (still in use so keep it).
        if (\Drupal::moduleHandler()->moduleExists("file_entity")) {
            $form['file'] = [
                '#type' => 'details',
                '#title' => $this->t('File types'),
                '#group' => 'exif',
            ];
            $all_mt = [];
            $all_filetypes = FileType::loadEnabled();
            // Setup file types.
            foreach ($all_filetypes as $item) {
                $all_mt[$item->id()] = $item->label();
            }
            $form['file']['filetypes'] = [
                '#type' => 'checkboxes',
                '#title' => $this->t('Filetypes'),
                '#options' => $all_mt,
                '#default_value' => $config->get('filetypes'),
                '#description' => $this->t('Select filetypes which should be checked for Exif & ITPC data.'),
            ];
        }
        else {
            $form['file']['filetypes'] = [
                '#type' => 'hidden',
                '#value' => [],
            ];
        }
        if (\Drupal::moduleHandler()->moduleExists("media")) {
            $form['media'] = [
                '#type' => 'details',
                '#title' => $this->t('Media types'),
                '#group' => 'exif',
            ];
            $all_mediatypes = $this->entityTypeManager
                ->getStorage('media_type')
                ->loadMultiple();
            $all_mt = [];
            foreach ($all_mediatypes as $item) {
                $all_mt[$item->id()] = $item->label();
            }
            $form['media']['mediatypes'] = [
                '#type' => 'checkboxes',
                '#title' => $this->t('Mediatypes'),
                '#options' => $all_mt,
                '#default_value' => $config->get('mediatypes'),
                '#description' => $this->t('Select mediatypes which should be checked for IPTC & Exif data.'),
            ];
        }
        else {
            $form['media']['mediatypes'] = [
                '#type' => 'hidden',
                '#default_value' => $config->get('mediatypes'),
            ];
        }
        $form['global']['update_metadata'] = [
            '#type' => 'checkbox',
            '#title' => $this->t('Refresh metadata on entity update'),
            '#default_value' => $config->get('update_metadata'),
            '#description' => $this->t('Files will be scanned when the node or media item they are attached to are initially created. This option will also scan images when the node or media items are updated.'),
        ];
        $form['global']['extraction_solution'] = [
            '#type' => 'select',
            '#title' => $this->t('Metadata extraction method'),
            '#options' => ExifFactory::getExtractionSolutions(),
            '#default_value' => $config->get('extraction_solution'),
            '#required' => TRUE,
        ];
        $form['global']['exiftool_location'] = [
            '#type' => 'textfield',
            '#title' => $this->t('Location of exiftool binary'),
            '#default_value' => $config->get('exiftool_location'),
            '#description' => $this->t('The system path to the exiftool binary.'),
            '#states' => [
                'visible' => [
                    ':input[name="extraction_solution"]' => [
                        'value' => 'simple_exiftool',
                    ],
                ],
            ],
        ];
        $form['global']['write_empty_values'] = [
            '#type' => 'checkbox',
            '#title' => $this->t('Write empty image data?'),
            '#default_value' => $config->get('write_empty_values'),
            '#description' => $this->t("If checked all values will be written. For example, to read the creation date from EXIF, but it's not available, it will just write an empty string. If unchecked, empty strings will not be written. This might be the desired behavior, if you have a default value for the CCK field."),
        ];
        if ($this->moduleHandler
            ->moduleExists('taxonomy')) {
            $all_vocs = [];
            $all_vocs[0] = 'None';
            foreach (Vocabulary::loadMultiple() as $item) {
                $all_vocs[$item->id()] = $item->label();
            }
            $form['global']['vocabulary'] = [
                '#type' => 'select',
                '#title' => $this->t('Default Vocabulary'),
                '#options' => $all_vocs,
                '#default_value' => $config->get('vocabulary'),
                '#description' => $this->t('Select vocabulary which should be used for iptc & exif data. If you think no vocabulary is usable for the purpose, take a look at <a href="/admin/config/media/exif/helper">the quick start page</a>.'),
            ];
        }
        if ($this->moduleHandler
            ->moduleExists('node')) {
            $all_nodetypes = $this->entityTypeManager
                ->getStorage('node_type')
                ->loadMultiple();
            // List all content types.
            $all_types = [];
            foreach ($all_nodetypes as $item) {
                $all_types[$item->id()] = $item->label();
            }
            if (!empty($all_types)) {
                $form['node'] = [
                    '#type' => 'details',
                    '#title' => $this->t('Content types'),
                    '#group' => 'exif',
                ];
                $form['node']['nodetypes'] = [
                    '#type' => 'checkboxes',
                    '#title' => $this->t('Content types'),
                    '#options' => $all_types,
                    '#default_value' => $config->get('nodetypes'),
                    '#description' => $this->t('Select content types which should be checked for IPTC & Exif data.'),
                ];
            }
        }
        // The old way (still in use so keep it).
        if ($this->moduleHandler
            ->moduleExists('file_entity')) {
            // List all file types.
            $all_types = [];
            foreach (FileType::loadEnabled() as $item) {
                $all_types[$item->id()] = $item->label();
            }
            if (!empty($all_types)) {
                $form['file'] = [
                    '#type' => 'details',
                    '#title' => $this->t('File types'),
                    '#group' => 'exif',
                ];
                $form['file']['filetypes'] = [
                    '#type' => 'checkboxes',
                    '#title' => $this->t('File types'),
                    '#options' => $all_types,
                    '#default_value' => $config->get('filetypes'),
                    '#description' => $this->t('Select file types which should be checked for Exif & ITPC data.'),
                ];
            }
        }
        if ($this->moduleHandler
            ->moduleExists('media')) {
            $all_mediatypes = $this->entityTypeManager
                ->getStorage('media_type')
                ->loadMultiple();
            $all_types = [];
            foreach ($all_mediatypes as $item) {
                $all_types[$item->id()] = $item->label();
            }
            if (!empty($all_types)) {
                $form['media'] = [
                    '#type' => 'details',
                    '#title' => $this->t('Media types'),
                    '#group' => 'exif',
                ];
                $form['media']['mediatypes'] = [
                    '#type' => 'checkboxes',
                    '#title' => $this->t('Media types'),
                    '#options' => $all_types,
                    '#default_value' => $config->get('mediatypes'),
                    '#description' => $this->t('Select media types which should be checked for IPTC & Exif data.'),
                ];
            }
        }
        // @todo Check if the media module is install to add automatically
        // @todo the image type active and add active default exif field.
        return parent::buildForm($form, $form_state);
    }
    
    /**
     * {@inheritdoc}
     */
    public function validateForm(array &$form, FormStateInterface $form_state) {
        if ($form_state->getValue('extraction_solution') == 'simple_exiftool' && !is_executable($form_state->getValue('exiftool_location'))) {
            $form_state->setErrorByName('exiftool_location', $this->t('The location provided for exiftool is not correct. Please ensure the exiftool location exists and is executable.'));
        }
        parent::validateForm($form, $form_state);
    }
    
    /**
     * {@inheritdoc}
     */
    public function submitForm(array &$form, FormStateInterface $form_state) {
        foreach ([
            'nodetypes',
            'filetypes',
            'mediatypes',
        ] as $entity_type) {
            $value = $form_state->getValue($entity_type);
            if (empty($value)) {
                $value = [];
            }
            $this->config('exif.settings')
                ->set($entity_type, $value);
        }
        $this->config('exif.settings')
            ->set('update_metadata', $form_state->getValue('update_metadata', TRUE))
            ->set('write_empty_values', $form_state->getValue('write_empty_values', FALSE))
            ->set('vocabulary', $form_state->getValue('vocabulary', 0))
            ->set('granularity', $form_state->getValue('granularity'))
            ->set('date_format_exif', $form_state->getValue('date_format_exif'))
            ->set('extraction_solution', $form_state->getValue('extraction_solution'))
            ->set('exiftool_location', $form_state->getValue('exiftool_location'))
            ->save();
        parent::submitForm($form, $form_state);
    }

}