ix/asynciterable/tomap.js

The Interactive Extensions for JavaScript

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.toMap = void 0;
const tslib_1 = require("tslib");
const identity_js_1 = require("../util/identity.js");
const withabort_js_1 = require("./operators/withabort.js");
const aborterror_js_1 = require("../aborterror.js");
/**
 * Converts an async-iterable to a map with a key selector and options for an element selector and cancellation.
 *
 * @template TSource The type of elements in the source collection.
 * @template TKey The type of key used for the map.
 * @template TElement The type of element to use for the map.
 * @param {AsyncIterable<TSource>} source The source collection to turn into a map.
 * @param {ToMapOptions<TSource, TElement>} [options]
 * @returns {(Promise<Map<TKey, TElement | TSource>>)}
 */
function toMap(source, options) {
    var _a, e_1, _b, _c;
    return tslib_1.__awaiter(this, void 0, void 0, function* () {
        const { ['signal']: signal, ['elementSelector']: elementSelector = identity_js_1.identityAsync, ['keySelector']: keySelector = identity_js_1.identityAsync, } = options || {};
        (0, aborterror_js_1.throwIfAborted)(signal);
        const map = new Map();
        try {
            for (var _d = true, _e = tslib_1.__asyncValues((0, withabort_js_1.wrapWithAbort)(source, signal)), _f; _f = yield _e.next(), _a = _f.done, !_a; _d = true) {
                _c = _f.value;
                _d = false;
                const item = _c;
                const value = yield elementSelector(item, signal);
                const key = yield keySelector(item, signal);
                map.set(key, value);
            }
        }
        catch (e_1_1) { e_1 = { error: e_1_1 }; }
        finally {
            try {
                if (!_d && !_a && (_b = _e.return)) yield _b.call(_e);
            }
            finally { if (e_1) throw e_1.error; }
        }
        return map;
    });
}
exports.toMap = toMap;

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