export declare namespace Able {
    /**
     * A list of resolved or unresolved abilities.
     */
    type AbilitySet = string[];
    /**
     * A map of ability aliases, where a single alias (the key) maps to a set of
     * abilities (value). This map can be resolved recursively.
     *
     * Example value:
     *
     * ```js
     * { "foo": ["bar"], "bar": ["baz", "bam"], "xxx": ["yyy"] }
     * ```
     *
     * With the above example value, given a list of abilities `["foo"]`, the
     * resolved abilities will be `["foo", "bar", "baz", "bam"]`.
     */
    interface GroupDefinition {
        [key: string]: AbilitySet | string | null | undefined;
    }
    /**
     * A map of values extracted or to be applied in a list of abilities. A
     * `ValueMap` of `{ foo: "bar", baz: ["1", "2"] }` equals to list of abilities
     * `["?foo=bar", "?baz[]=1", "?baz[]=2"]`.
     */
    interface ValueMap {
        [key: string]: string | string[];
    }
    /**
     * Resolve a set of abilities with a group definition, returning a set of
     * abilities based on all abilities and references to groups in `abilities`.
     *
     * Unlike `.resolve`, this function does not apply or resolve values.
     *
     * ```ts
     * const definition = { foo: ["bar"] };
     * const abilities = ["foo", "bam"];
     * Able.flatten(definition, abilities);
     * // ["foo", "bam", "bar"]
     * ```
     *
     * @param definition
     * @param abilities
     */
    function flatten(definition: GroupDefinition, abilities: AbilitySet): AbilitySet;
    /**
     * Extract values from a resolved set of abilities and return the values as a
     * map with the remaining abilities.
     *
     * Example:
     *
     * ```ts
     * const abilities = ["foo", "bam", "?foo=1", "?x[]=3"];
     * Able.extractValues(abilities);
     * // [ { foo: '1', x: [ '3' ] }, [ 'foo', 'bam' ] ]
     * ```
     *
     * @param abilities
     */
    function extractValues(abilities: AbilitySet): [ValueMap, AbilitySet];
    /**
     * Replacing template abilities with a given set of values applied. Template
     * abilities with missing values are removed.
     *
     * Example:
     *
     * ```ts
     * const abilities = ["article:{articleId}:read", "post:{postId}:read"]
     * const values = { articleId: ["1", "2"] }
     * Able.applyValues(abilities, values);
     * // [ 'article:1:read', 'article:2:read' ]
     * ```
     *
     * @param abilities
     * @param values
     */
    function applyValues(abilities: AbilitySet, values: ValueMap): AbilitySet;
    /**
     * Flatten abilities, and extract and apply embedded values.
     *
     * ```ts
     * const definition = { writer: ["article:{articleId}:write"] };
     * const abilities = ["writer", "?articleId[]=4"];
     * Able.resolve(definition, abilities);
     * // [ 'writer', 'article:4:write' ]
     * ```
     *
     * @param definition
     * @param abilities
     */
    function resolve(definition: GroupDefinition, abilities: AbilitySet): AbilitySet;
    /**
     * Compare a set of resolved abilities with a set of required abilities, and
     * return all abilities in `requiredAbilities` missing in `abilities`. Returns
     * an empty array if `abilities` contains all abilities from
     * `requiredAbilities`.
     * @param abilities
     * @param requiredAbilities
     */
    function getMissingAbilities(abilities: AbilitySet, requiredAbilities: AbilitySet): AbilitySet;
    /**
     * Similar to `getMissingAbilities`, but returns `true` if there are no
     * missing abilities. In effect, this function returns whether the user has
     * access to something that requires a set of abilities. Only returns `true`
     * if `appliedAbilities` include all abilities in `requiredAbilities`.
     * @param appliedAbilities
     * @param requiredAbilities
     */
    function canAccess(appliedAbilities: AbilitySet, requiredAbilities: AbilitySet): boolean;
}