function StyleForm::submitForm

Overrides FormInterface::submitForm

File

modules/image_example/src/Form/StyleForm.php, line 141

Class

StyleForm

Form for interacting with image styles.

Namespace

Code

public function submitForm(array &$form, FormStateInterface $form_state) {
    // When using the #managed_file form element the file is automatically
    // uploaded an saved to the {file} table. The value of the corresponding
    // form element is set to the ID of the new file. If the file ID is not
    // zero, we have a valid file.
    if (($fid = $form_state->getValue('image_fid')) != 0) {
        // The new file's status is set to 0 or temporary and in order to ensure
        // that the file is not removed after 6 hours, we need to change its
        // status to 1. Save the ID of the uploaded image for later use.
        if ($file = File::load($fid)) {
            $file->setPermanent();
            $file->save($file);
            // When a module is managing a file, it must manage the usage count.
            $this->fileUsage
                ->add($file, 'image_example', 'sample_image');
            $this->messenger
                ->addMessage($this->t('The image @image_name was uploaded and saved. Its ID is @fid and it will be displayed using the image style @style.', [
                '@image_name' => $file->getFilename(),
                '@fid' => $fid,
                '@style' => $form_state->getValue('style_name'),
            ]));
        }
        else {
            $fid = NULL;
            $this->messenger
                ->addWarning($this->t('The image could not be saved.'));
        }
    }
    // Delete the previously uploaded image.
    $old_fid = $this->state
        ->get('image_example.image_fid');
    if (!empty($old_fid) && ($old_file = File::load($old_fid))) {
        $image_name = $old_file->getFilename();
        // When a module is managing a file, it must manage the usage count.
        $this->fileUsage
            ->delete($old_file, 'image_example', 'sample_image');
        // File::delete() verifies the file is used by any other modules. If it
        // is, the file will not be deleted. The module still needs to update
        // its reference.
        $old_file->delete();
        $this->messenger
            ->addMessage($this->t('The image @image_name was removed.', [
            '@image_name' => $image_name,
        ]));
    }
    // Usually, a form submission handler stores the data in a configuration
    // object, or in a custom database table, but in this case we use the state
    // service.
    $this->state
        ->set('image_example.image_fid', $fid);
    $this->state
        ->set('image_example.style_name', $form_state->getValue('style_name'));
}