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File: FieldUpload.php
<?php
/**
 * @file classes/components/form/FieldUpload.php
 *
 * Copyright (c) 2014-2021 Simon Fraser University
 * Copyright (c) 2000-2021 John Willinsky
 * Distributed under the GNU GPL v3. For full terms see the file docs/COPYING.
 *
 * @class FieldUpload
 *
 * @ingroup classes_controllers_form
 *
 * @brief A field for uploading a file.
 */

namespace PKP\components\forms;

use APP\core\Application;

class FieldUpload extends Field
{
    /** @copydoc Field::$component */
    public $component = 'field-upload';

    /**
     * @var array Options to pass to the dropzone.js instance.
     *
     * A `url` key must be included with the value of the API endpoint where files
     *  can be uploaded to: <api-path>/temporaryFiles.
     */
    public $options = [];

    /**
     * @copydoc Field::__construct()
     */
    public function __construct($name, $args = [])
    {
        parent::__construct($name, $args);

        $this->options['maxFilesize'] = Application::getIntMaxFileMBs();
        $this->options['timeout'] = ini_get('max_execution_time')
            ? ini_get('max_execution_time') * 1000
            : 0;

        $this->options = array_merge(
            [
                'dropzoneDictDefaultMessage' => __('form.dropzone.dictDefaultMessage'),
                'dropzoneDictFallbackMessage' => __('form.dropzone.dictFallbackMessage'),
                'dropzoneDictFallbackText' => __('form.dropzone.dictFallbackText'),
                'dropzoneDictFileTooBig' => __('form.dropzone.dictFileTooBig'),
                'dropzoneDictInvalidFileType' => __('form.dropzone.dictInvalidFileType'),
                'dropzoneDictResponseError' => __('form.dropzone.dictResponseError'),
                'dropzoneDictCancelUpload' => __('form.dropzone.dictCancelUpload'),
                'dropzoneDictUploadCanceled' => __('form.dropzone.dictUploadCanceled'),
                'dropzoneDictCancelUploadConfirmation' => __('form.dropzone.dictCancelUploadConfirmation'),
                'dropzoneDictRemoveFile' => __('form.dropzone.dictRemoveFile'),
                'dropzoneDictMaxFilesExceeded' => __('form.dropzone.dictMaxFilesExceeded'),
            ],
            $this->options
        );
    }

    /**
     * @copydoc Field::validate()
     */
    public function validate()
    {
        if (empty($this->options['url'])) {
            return false;
        }
        return parent::validate();
    }

    /**
     * @copydoc Field::getConfig()
     */
    public function getConfig()
    {
        $config = parent::getConfig();
        $config['options'] = $this->options;
        $config['uploadFileLabel'] = __('common.upload.addFile');
        $config['restoreLabel'] = __('common.upload.restore');

        return $config;
    }
}