import { GenericModels } from "./../entity/models/GenericModels";
/**
 * Convenience converters that turn the array-shaped collections
 * returned by the GearN API into `Map<string, T>` lookups keyed by
 * the most common business identifier.
 *
 * The SDK transports always deliver collections as arrays so the
 * wire format stays JSON / MsgPack friendly. Application code
 * usually wants O(1) lookup by id; wrapping each call site in a
 * small `for` loop is repetitive, so this helper centralises the
 * conversion.
 *
 * Each method returns `null` when the input is `null` so the call
 * site can chain it after a typed response without a separate
 * null-check (`GNUtils.toFriendDictionary(response.getResponseData()?.playerFriends)`).
 */
export declare class GNUtils {
    /**
     * Indexes a {@link GenericModels.DataItem} array by its
     * `key` field.
     *
     * Useful for player-data / custom-data responses where the
     * application normally needs to look up entries by key. Later
     * duplicates with the same key win, mirroring `Map.set`'s
     * default behaviour.
     *
     * @param datas Source array, or `null`.
     * @returns A keyed map, or `null` when `datas` is `null`.
     */
    static toDatasDictionary(datas: Array<GenericModels.DataItem>): Map<string, GenericModels.DataItem>;
    /**
     * Indexes a {@link GenericModels.TagItem} array by its `key`
     * field. Used for player / character tag responses.
     */
    static toTagsDictionary(tags: Array<GenericModels.TagItem>): Map<string, GenericModels.TagItem>;
    /**
     * Indexes a {@link GenericModels.CurrencyItem} array by its
     * `key` field. Used for player / group currency responses.
     */
    static toCurrenciesDictionary(currencies: Array<GenericModels.CurrencyItem>): Map<string, GenericModels.CurrencyItem>;
    /**
     * Indexes a {@link GenericModels.StatisticsItem} array by its
     * `key` field. Used for player / group statistic responses.
     */
    static toStatisticsDictionary(statistics: Array<GenericModels.StatisticsItem>): Map<string, GenericModels.StatisticsItem>;
    /**
     * Indexes a {@link GenericModels.InventoryItem} array by its
     * `itemId` field — the unique inventory ledger entry id, not
     * the catalog identifier. To bucket by catalog id instead,
     * write a custom loop using the `classId` field.
     */
    static toInventoriesDictionary(inventories: Array<GenericModels.InventoryItem>): Map<string, GenericModels.InventoryItem>;
    /**
     * Indexes a {@link GenericModels.GroupItem} array by its
     * `groupId` field. Used for player-group lookup responses.
     */
    static toGroupDictionary(groups: Array<GenericModels.GroupItem>): Map<string, GenericModels.GroupItem>;
    /**
     * Indexes a {@link GenericModels.FriendItem} array by its
     * `friendId` field. Used for player-friend lookup responses
     * and to drive social UIs that need O(1) presence checks.
     */
    static toFriendDictionary(friends: Array<GenericModels.FriendItem>): Map<string, GenericModels.FriendItem>;
}