@aws-amplify/datastore/lib/sync/datastoreConnectivity.js

AppSyncLocal support for aws-amplify

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var tslib_1 = require("tslib");
var zen_observable_ts_1 = tslib_1.__importDefault(require("zen-observable-ts"));
var core_1 = require("@aws-amplify/core");
var datastoreReachability_1 = require("./datastoreReachability");
var logger = new core_1.ConsoleLogger('DataStore');
var RECONNECTING_IN = 5000; // 5s this may be configurable in the future
var DataStoreConnectivity = /** @class */ (function () {
    function DataStoreConnectivity() {
        this.connectionStatus = {
            online: false,
        };
    }
    DataStoreConnectivity.prototype.status = function () {
        var _this = this;
        if (this.observer) {
            throw new Error('Subscriber already exists');
        }
        return new zen_observable_ts_1.default(function (observer) {
            _this.observer = observer;
            // Will be used to forward socket connection changes, enhancing Reachability
            _this.subscription = datastoreReachability_1.ReachabilityMonitor.subscribe(function (_a) {
                var online = _a.online;
                _this.connectionStatus.online = online;
                var observerResult = tslib_1.__assign({}, _this.connectionStatus); // copyOf status
                observer.next(observerResult);
            });
            return function () {
                clearTimeout(_this.timeout);
                _this.unsubscribe();
            };
        });
    };
    DataStoreConnectivity.prototype.unsubscribe = function () {
        if (this.subscription) {
            clearTimeout(this.timeout);
            this.subscription.unsubscribe();
        }
    };
    // for consistency with other background processors.
    DataStoreConnectivity.prototype.stop = function () {
        return tslib_1.__awaiter(this, void 0, void 0, function () {
            return tslib_1.__generator(this, function (_a) {
                this.unsubscribe();
                return [2 /*return*/];
            });
        });
    };
    DataStoreConnectivity.prototype.socketDisconnected = function () {
        var _this = this;
        if (this.observer && typeof this.observer.next === 'function') {
            this.observer.next({ online: false }); // Notify network issue from the socket
            this.timeout = setTimeout(function () {
                var observerResult = tslib_1.__assign({}, _this.connectionStatus); // copyOf status
                _this.observer.next(observerResult);
            }, RECONNECTING_IN); // giving time for socket cleanup and network status stabilization
        }
    };
    return DataStoreConnectivity;
}());
exports.default = DataStoreConnectivity;
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