/**
 * @module notification.api.util
 *
 * Utility functions for applying {@link UpdateNotificationUserParams} changes to notification config objects.
 * Used by the server action service when processing user config update requests.
 */
import { type Maybe } from '@dereekb/util';
import { type NotificationBoxRecipientTemplateConfigRecord, type NotificationUserDefaultNotificationBoxRecipientConfig, type NotificationUserNotificationBoxRecipientConfig } from './notification.config';
import { type NotificationBoxRecipientTemplateConfigArrayEntryParam, type UpdateNotificationUserDefaultNotificationBoxRecipientConfigParams, type UpdateNotificationUserNotificationBoxRecipientParams } from './notification.api';
import { type AppNotificationTemplateTypeInfoRecordService } from './notification.details';
import { type NotificationTemplateType } from './notification.id';
/**
 * Applies an array of config entry params to a {@link NotificationBoxRecipientTemplateConfigRecord},
 * inserting new entries, merging updates, and removing entries marked with `remove: true`.
 *
 * @param a - Existing config record.
 * @param b - Array of update params to apply.
 * @param limitToAllowedConfigTypes - When provided, filters the result to only include these template types.
 * @returns The updated config record, or undefined if no changes were made.
 */
export declare function updateNotificationBoxRecipientTemplateConfigRecord(a: NotificationBoxRecipientTemplateConfigRecord, b: NotificationBoxRecipientTemplateConfigArrayEntryParam[], limitToAllowedConfigTypes?: Maybe<Iterable<NotificationTemplateType>>): Maybe<NotificationBoxRecipientTemplateConfigRecord>;
/**
 * Applies {@link UpdateNotificationUserDefaultNotificationBoxRecipientConfigParams} to an existing
 * {@link NotificationUserDefaultNotificationBoxRecipientConfig}, producing an updated config.
 *
 * @param a - Existing config.
 * @param b - Update params to apply.
 * @param limitToAllowedConfigTypes - When provided, filters config types to only allowed template types.
 * @returns The updated default recipient config.
 */
export declare function updateNotificationUserDefaultNotificationBoxRecipientConfig(a: NotificationUserDefaultNotificationBoxRecipientConfig, b: UpdateNotificationUserDefaultNotificationBoxRecipientConfigParams, limitToAllowedConfigTypes?: Maybe<Iterable<NotificationTemplateType>>): NotificationUserDefaultNotificationBoxRecipientConfig;
/**
 * Applies update params to a {@link NotificationUserNotificationBoxRecipientConfig} and returns the updated config
 * only if it actually changed. Returns `undefined` if no changes were detected.
 *
 * Automatically sets `ns = true` (needs sync) when changes are detected and the recipient has been indexed.
 *
 * @param a - Existing per-box recipient config.
 * @param b - Update params to apply.
 * @param limitToAllowedConfigTypes - When provided, filters template config types to only allowed types.
 * @returns The updated config if changes were detected, or undefined if no changes occurred.
 */
export declare function updateNotificationUserNotificationBoxRecipientConfigIfChanged(a: NotificationUserNotificationBoxRecipientConfig, b: UpdateNotificationUserNotificationBoxRecipientParams, limitToAllowedConfigTypes?: Maybe<Iterable<NotificationTemplateType>>): Maybe<NotificationUserNotificationBoxRecipientConfig>;
/**
 * Batch-applies an array of {@link UpdateNotificationUserNotificationBoxRecipientParams} to the user's
 * per-box config array. Only updates configs for boxes that already exist in the user's config.
 *
 * Handles deletion of removed configs (when `deleteRemovedConfig` is set) and filters template types
 * through the optional {@link AppNotificationTemplateTypeInfoRecordService}.
 *
 * Returns `undefined` if no changes were made.
 *
 * @param a - Existing per-box recipient config array.
 * @param b - Array of update params to apply to matching boxes.
 * @param filterWithService - Optional service used to filter template types to only those valid for each box's model.
 * @returns The updated config array if any changes occurred, or undefined if nothing changed.
 */
export declare function updateNotificationUserNotificationBoxRecipientConfigs(a: NotificationUserNotificationBoxRecipientConfig[], b: UpdateNotificationUserNotificationBoxRecipientParams[], filterWithService?: AppNotificationTemplateTypeInfoRecordService): Maybe<NotificationUserNotificationBoxRecipientConfig[]>;