/**
 * punditMatchNothing: This is what your Policy class should return if the
 * current context IS NOT authorized to query this entity.
 * You should throw a "not authorized" error when your `pundit.filter()`
 * call returns this.
 *
 * Used when the PunditPolicy#filter() decides NOTHING should be matched.
 * This serves the same purpose of ActiveRecord's `none` query method.
 * See: https://apidock.com/rails/v7.1.3.4/ActiveRecord/QueryMethods/none
 */
export declare const punditMatchNothing: unique symbol;
export type PunditMatchNothing = typeof punditMatchNothing;
/**
 * Base class for your policies.
 * Extend this class for each of your entities.
 * Declare your authorization logic in the `authorize()` method and
 * filtering logic in `filter()` and `filterFor()` methods.
 *
 * You should `.register()` your policies to your own pundit instance
 * so your entity will be correctly recognized.
 */
export declare abstract class PunditPolicy<Context, Model, Actions extends string, Filter = unknown, FilterFor = Filter> {
    private cons;
    constructor(cons: new (...args: any[]) => Model);
    /**
     * Your policy's authorization logic will be implemented in this method.
     */
    abstract authorize(context: Context, object: Model, action: Actions): Promise<boolean>;
    /**
     * Build a generic filter for your entity.
     * Can be used for both generic entity selection queries and individual record lookups.
     */
    abstract filter(context: Context): Promise<Filter | typeof punditMatchNothing>;
    /**
     * Build a filter specific for the given action.
     * FilterFor parameter can be used to declare different return type for this.
     *
     * Unlike the filter() method, this method is not required to be implemented.
     */
    filterFor(context: Context, action: Actions): Promise<FilterFor | typeof punditMatchNothing>;
    handlesModel(object: unknown): object is Model;
    handlesModelConstructor(cons: unknown): cons is new () => Model;
}
/**
 * Find a proper action type for the given entity class.
 */
type FindAction<C, P extends PunditPolicy<C, unknown, any>[], M> = P extends [
    infer F,
    ...infer R
] ? F extends PunditPolicy<C, M, infer A> ? A : R extends PunditPolicy<C, any, any>[] ? FindAction<C, R, M> : C : "No proper policy registered for handling this model type";
/**
 * Helper generic to find a proper `filter()` result for the given
 * entity type.
 */
type FindFilterType<C, P extends PunditPolicy<C, unknown, any>[], M> = P extends [infer F, ...infer R] ? F extends PunditPolicy<C, M, infer _, infer Filter> ? Filter : R extends PunditPolicy<C, any, any>[] ? FindFilterType<C, R, M> : C : "No proper policy registered for handling this model type";
/**
 * Helper generic to find a proper `filter()` result for the given
 * entity type.
 */
type FindFilterForType<C, P extends PunditPolicy<C, unknown, any, any>[], M> = P extends [infer F, ...infer R] ? F extends PunditPolicy<C, M, infer _Actions, infer _Filter, infer FilterFor> ? FilterFor : R extends PunditPolicy<C, any, any, any, any>[] ? FindFilterForType<C, R, M> : C : "No proper policy registered for handling this model type";
export declare class Pundit<C, P extends PunditPolicy<C, unknown, any, any>[] = []> {
    private policies;
    constructor(policies?: PunditPolicy<C, unknown, any, any>[]);
    /**
     * Register a policy, then, this pundit instance will be able to
     * recognize the entity that policy includes.
     */
    register<M, A extends string, F, FF>(policy: PunditPolicy<C, M, A, F, FF>): Pundit<C, [...P, PunditPolicy<C, M, A, F, FF>]>;
    /**
     * Authorize an action on an instance of any of the register()'ed entities.
     * `action` type will be determined the type of your object's class.
     */
    authorize<M>(ctx: C, object: M, action: FindAction<C, P, M>): Promise<boolean>;
    /**
     * Build a filter for the given entity.
     * This filter is supposed to be used in your database queries.
     */
    filter<M>(context: C, cons: new (...args: any[]) => M): Promise<FindFilterType<C, P, M> | typeof punditMatchNothing>;
    /**
     * Build a filter for specific to an action.
     */
    filterFor<M>(context: C, cons: new (...args: any[]) => M, action: FindAction<C, P, M>): Promise<FindFilterForType<C, P, M> | typeof punditMatchNothing>;
}
export {};