es-promise-ext/dist/reduce/reduce.js

Native promise extensions for javascript and typescript.

"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
    return new (P || (P = Promise))(function (resolve, reject) {
        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
        step((generator = generator.apply(thisArg, _arguments || [])).next());
    });
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.default = reduce;
;
function reduce(asyncFunctions, option) {
    return __awaiter(this, void 0, void 0, function* () {
        var _a, _b, _c;
        if (!Array.isArray(asyncFunctions)) {
            throw new TypeError('Promise.reduce must be called with an async function array');
        }
        const canceller = (_a = option === null || option === void 0 ? void 0 : option.canceller) !== null && _a !== void 0 ? _a : {};
        const progress = (_b = option === null || option === void 0 ? void 0 : option.progress) !== null && _b !== void 0 ? _b : function () { };
        const initValue = (_c = option === null || option === void 0 ? void 0 : option.initValue) !== null && _c !== void 0 ? _c : undefined;
        let step = 0;
        let result = initValue;
        for (let asyncFunction of asyncFunctions) {
            if (canceller.cancelled === true) {
                progress(canceller, step++, asyncFunctions.length);
                continue;
            }
            if (typeof asyncFunction !== 'function')
                throw new TypeError('Promise.reduce must be called with an async function array');
            result = yield asyncFunction(result);
            progress(result, step++, asyncFunctions.length);
        }
        return result;
    });
}