bp_nouveau_ajax_document_upload()

function bp_nouveau_ajax_document_upload() {
	$response = array(
		'feedback' => __( 'There was a problem when trying to upload this file.', 'buddyboss' ),
	);

	// Bail if not a POST action.
	if ( ! bp_is_post_request() ) {
		wp_send_json_error( $response, 500 );
	}

	if ( empty( $_POST['_wpnonce'] ) ) {
		wp_send_json_error( $response, 500 );
	}

	// Use default nonce.
	$nonce = filter_input( INPUT_POST, '_wpnonce', FILTER_SANITIZE_STRING );
	$check = 'bp_nouveau_media';

	// Nonce check!
	if ( empty( $nonce ) || ! wp_verify_nonce( $nonce, $check ) ) {
		wp_send_json_error( $response, 500 );
	}

	add_filter( 'upload_dir', 'bp_document_upload_dir' );

	// Upload file.
	$result = bp_document_upload();

	remove_filter( 'upload_dir', 'bp_document_upload_dir' );

	if ( is_wp_error( $result ) ) {

		if ( bp_current_user_can( 'bp_moderate' ) ) {
			$error_msg = $result->get_error_message();
			if ( 'Sorry, this file type is not permitted for security reasons.' === $error_msg ) {
				$response['feedback'] = __( 'Make sure you whitelisted extension and MIME TYPE in media settings and added correct MIME TYPE in extension entry.', 'buddyboss' );
			} else {
				$response['feedback'] = $result->get_error_message();
			}
		} else {
			$response['feedback'] = $result->get_error_message();
		}
		wp_send_json_error( $response, $result->get_error_code() );
	}

	wp_send_json_success( $result );
}