import { EJSONable } from 'meteor/ejson';
declare module 'meteor/session' {
    namespace Session {
        /**
         * Test if a session variable is equal to a value. If inside a
         * reactive computation, invalidate the computation the next
         * time the variable changes to or from the value.
         * @param key The name of the session variable to test
         * @param value The value to test against
         */
        function equals(key: string, value: string | number | boolean | any): boolean;

        /**
         * Get the value of a session variable. If inside a reactive
         * computation, invalidate the computation the next time the
         * value of the variable is changed by `Session.set`. This
         * returns a clone of the session value, so if it's an object or an array,
         * mutating the returned value has no effect on the value stored in the
         * session.
         * @param key The name of the session variable to return
         */
        function get(key: string): any;

        /**
         * Set a variable in the session. Notify any listeners that the value
         * has changed (eg: redraw templates, and rerun any
         * `Tracker.autorun` computations, that called
         * `Session.get` on this `key`.)
         * @param key The key to set, eg, `selectedItem`
         * @param value The new value for `key`
         */
        function set(key: string, value: EJSONable | any): void;

        /**
         * Set a variable in the session if it hasn't been set before.
         * Otherwise works exactly the same as `Session.set`.
         * @param key The key to set, eg, `selectedItem`
         * @param value The new value for `key`
         */
        function setDefault(key: string, value: EJSONable | any): void;
    }
}