/**
 * Type alias for the sort direction.
 *
 * Represents the direction of sorting, either ascending (`"asc"`) or descending (`"desc"`).
 *
 * @example
 * const sortDirection: ISortDirection = "asc";
 */
export type ISortDirection = "asc" | "desc";
/**
 * Type alias for a sortable column.
 *
 * Represents a column that can be used for sorting, which can be a key of the object being sorted (`keyof T`),
 * a string, a number, or a symbol.
 *
 * @typeparam T The type of the object being sorted.
 *
 * @example
 * interface User {
 *   name: string;
 *   age: number;
 * }
 *
 * const sortableColumn: ISortColumn<User> = "name"; // or keyof User, or a string, or a number, or a symbol
 */
export type ISortColumn<T> = keyof T | string | number | symbol;
/**
 * Options for configuring the `getValue` function to be applied on a given item.
 *
 * Provides configuration options for the `getValue` function, which is used to extract the value from an item
 * for sorting purposes.
 *
 * @typeparam T The type of the item.
 *
 * @property {T} item - The item to be processed.
 * @property {ISortColumn<T>} column - The column to be used for sorting.
 *
 * @extends {ISortByConfig<T>}
 *
 * @example
 * interface User {
 *   name: string;
 *   age: number;
 * }
 *
 * const options: ISortByGetItemOptions<User> = {
 *   item: { name: "John", age: 30 },
 *   column: "name",
 *   // other config options from ISortByConfig<User>
 * };
 */
export type ISortByGetItemOptions<T = any> = {
    /**
     * The item to be processed.
     */
    item: T;
    /**
     * The column to be used for sorting.
     */
    column: ISortColumn<T>;
} & ISortByConfig<T>;
/**
 * Example:
 * ```ts
 * interface User {
 *   name: string;
 *   age: number;
 * }
 *
 * const options: ISortByGetItemOptions<User> = {
 *   item: { name: "John", age: 30 },
 *   column: "name",
 *   // ... other ISortByConfig options ...
 * };
 * ```
 * Configuration options for sorting items.
 *
 * @typeparam T The type of the item being sorted.
 */
export type ISortByConfig<T = any> = {
    /**
     * The direction of the sort.
     *
     * Represents the direction of sorting, either ascending (`"asc"`) or descending (`"desc"`).
     *
     * @default undefined
     * @example
     * const config: ISortByConfig<User> = {
     *   dir: "asc",
     *   // ...
     * };
     */
    dir?: ISortDirection;
    /**
     * The column to use for sorting if the item is an array.
     *
     * Represents a column that can be used for sorting, which can be a key of the object being sorted (`keyof T`),
     * a string, a number, or a symbol.
     *
     * @default undefined
     * @example
     * const config: ISortByConfig<User> = {
     *   column: "name",
     *   // ...
     * };
     */
    column?: ISortColumn<T>;
    /**
     * Whether to ignore case when sorting.
     *
     * If `true`, the sort will ignore the case of the values being sorted.
     *
     * @default false
     * @example
     * const config: ISortByConfig<User> = {
     *   ignoreCase: true,
     *   // ...
     * };
     */
    ignoreCase?: boolean;
    /**
     * The name of the unique key for each item.
     *
     * Represents the name of the key that uniquely identifies each item.
     *
     * @default undefined
     * @example
     * const config: ISortByConfig<User> = {
     *   keyName: "id",
     *   // ...
     * };
     */
    keyName?: string;
    /**
     * A function to retrieve the value to use for sorting an item.
     *
     * This function takes an `ISortByGetItemOptions` object as an argument and returns the value to use for sorting.
     *
     * @default undefined
     * @example
     * const config: ISortByConfig<User> = {
     *   getValue: (options) => options.item.name,
     *   // ...
     * };
     */
    getValue?: (options: ISortByGetItemOptions<T>) => any;
};
/**
 * Sorts an array of elements of type T.
 *
 * @typeparam T The type of data to be sorted.
 * @param {Array<T>} array The collection to be sorted.
 * @param {ISortByConfig<T>} config The configuration options.
 *
 * @example
 * ```ts
 * sortBy([{ test: 'b' }, { test: 'b' }], { getValue: ({ item, column }) => item[column], dir: 'asc', ignoreCase: false })
 * ```
 *
 * The `config` object can have the following properties:
 *
 * - `dir`: The direction of the sort. Can be either "asc" or "desc". Defaults to "asc".
 * - `column`: The name of the column to use for sorting.
 * - `ignoreCase`: Whether to ignore case when sorting strings. Defaults to false.
 * - `getValue`: A function that takes an item and a column, and returns the value to be used for sorting.
 *
 * If `getValue` is not provided, it defaults to a function that returns the value of the specified column from the item.
 */
export declare function sortBy<T = any>(array: Array<T>, config: ISortByConfig<T>): Array<T>;