@parity/light.js/lib/utils/operators/switchMapPromise.js

A high-level reactive JS library optimized for light clients

"use strict";
// Copyright 2015-2019 Parity Technologies (UK) Ltd.
// This file is part of Parity.
//
// SPDX-License-Identifier: MIT
Object.defineProperty(exports, "__esModule", { value: true });
var operators_1 = require("rxjs/operators");
var rxjs_1 = require("rxjs");
/**
 * RxJs operator that takes a promise as argument and switches the source
 * observable to the promise converted as an observable.
 *
 * @param options.emitErrors In case the promise errors, the observable will
 * error out (throw and abort) if emitErrors is `true`; otherwise the error will
 * just be logged.
 *
 * @ignore
 */
exports.switchMapPromise = function (promise, options) {
    if (options === void 0) { options = { emitErrors: false }; }
    return operators_1.switchMap(function () {
        return rxjs_1.from(promise().then(function (result) {
            // The result can sometimes be {id: 2, jsonrpc: "2.0", error: {...}}
            if (result.error) {
                return Promise.reject(result);
            }
            return Promise.resolve(result);
        })).pipe(operators_1.catchError(function (err) {
            console.group();
            console.error({ call: promise.toString(), err: err });
            console.error(new Error('Error while executing API call, see error log above for more information.'));
            console.groupEnd();
            if (options.emitErrors) {
                return rxjs_1.throwError(err);
            }
            else {
                return rxjs_1.empty();
            }
        }));
    });
};