Display Upload Folder Links - Dropbox

add_action('wpcf7_before_send_mail', function( $wpcf7 ){
    if( WPCF7_Submission::get_instance() ){
        $mail = $wpcf7->prop('mail');
        $fields = $wpcf7->scan_form_tags( array( 'type' => array('mfile', 'mfile*') ) );
        $folder = '';

        // For dropbox
        $dropbox = get_option('drag_n_drop_storage_api_dropbox');
        $access_tokens = ( isset( $dropbox['dropbox']['tokens']['access_token'] ) ? $dropbox['dropbox']['tokens']['access_token'] : '' );

        if( $uploader = wp_list_pluck( $fields, 'name' ) ){
            foreach( $uploader as $upload ){
                if( isset( $_POST[ $upload ] ) ){
                    $folder = dirname( $_POST[ $upload ][0] );
                    break;
                }
            }
        }

        if( $folder ){

            $data = array(
                'path' => $folder,
                'settings' => ['requested_visibility' => 'public']
            );

            $response = wp_remote_post( 'https://api.dropboxapi.com/2/sharing/create_shared_link_with_settings', array(
                'headers' => array( 'Authorization' => 'Bearer '.$access_tokens, 'Content-Type' => 'application/json' ),
                'body' => json_encode( $data ),
                'timeout' => 20
            ));

            if( ! is_wp_error( $response ) ){
                $json_response = json_decode( wp_remote_retrieve_body( $response ), true);
                if( isset( $json_response['url'] ) ){
                    $mail['body'] = str_replace('[your-name__folder]', $json_response['url'], $mail['body'] );
                }
            }

        }

        $wpcf7->set_properties( array("mail" => $mail) );
    }

    return $wpcf7;
}, 10, 1);