"use strict";
/**
 * Copyright (c) "Neo4j"
 * Neo4j Sweden AB [https://neo4j.com]
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
Object.defineProperty(exports, "__esModule", { value: true });
exports.identity = identity;
exports.reuseOngoingRequest = reuseOngoingRequest;
var neo4j_driver_core_1 = require("neo4j-driver-core");
/**
 * Identity function.
 *
 * Identity functions are function which returns the input as output.
 *
 * @param {any} x
 * @returns {any} the x
 */
function identity(x) {
    return x;
}
/**
 * Makes the function able to share ongoing requests
 *
 * @param {function(...args): Promise} func The function to be decorated
 * @param {any} thisArg The `this` which should be used in the function call
 * @return {function(...args): Promise} The decorated function
 */
function reuseOngoingRequest(func, thisArg) {
    if (thisArg === void 0) { thisArg = null; }
    var ongoingRequests = new Map();
    return function () {
        var args = [];
        for (var _i = 0; _i < arguments.length; _i++) {
            args[_i] = arguments[_i];
        }
        var key = neo4j_driver_core_1.json.stringify(args);
        if (ongoingRequests.has(key)) {
            return ongoingRequests.get(key);
        }
        var promise = func.apply(thisArg, args);
        ongoingRequests.set(key, promise);
        return promise.finally(function () {
            ongoingRequests.delete(key);
        });
    };
}
