osh-js/core/datasource/consysapi/ConSysApi.datasource.updater.js

OSH javascript Toolkit

var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
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};
var __generator = (this && this.__generator) || function (thisArg, body) {
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            if (y = 0, t) op = [op[0] & 2, t.value];
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                case 0: case 1: t = op; break;
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};
var ConSysApiDatasourceUpdater = /** @class */ (function () {
    function ConSysApiDatasourceUpdater(properties) {
        this.properties = properties;
        this.datastreamInterval = undefined;
    }
    ConSysApiDatasourceUpdater.prototype.fetchTime = function (url) {
        return __awaiter(this, void 0, void 0, function () {
            var _this = this;
            return __generator(this, function (_a) {
                return [2 /*return*/, fetch(url)
                        .then(function (response) {
                        if (!response.ok) {
                            // create error object and reject if not a 2xx response code
                            var err = new Error("HTTP status code: " + response.status);
                            err.response = response;
                            err.status = response.status;
                            _this.onError(err);
                            throw err;
                        }
                        return response;
                    })
                        .then(function (response) { return response.json(); })
                        .then(function (response) {
                        // update datastream times
                        if (response && response.items.length > 0 && response.items[0].phenomenonTime
                            && response.items[0].phenomenonTime.length > 1) {
                            var minTime = response.items[0].phenomenonTime[0];
                            var maxTime = response.items[0].phenomenonTime[1];
                            _this.onTimeChanged(minTime, maxTime);
                        }
                    })];
            });
        });
    };
    ConSysApiDatasourceUpdater.prototype.start = function () {
        return __awaiter(this, void 0, void 0, function () {
            var regex, match, datastreamId, url_1;
            var _this = this;
            return __generator(this, function (_a) {
                regex = new RegExp('\\/(.*\\/)(.*)\\/observations');
                if (regex.test(this.properties.resource)) {
                    match = regex.exec(this.properties.resource);
                    datastreamId = match[2];
                    url_1 = "http".concat(this.properties.tls ? 's' : '', "://").concat(this.properties.endpointUrl, "/datastreams?id=").concat(datastreamId, "&select=id,phenomenonTime&f=application%2Fjson");
                    return [2 /*return*/, this.fetchTime(url_1).then(function () {
                            _this.datastreamInterval = setInterval(function () {
                                _this.fetchTime(url_1);
                            }, 5000);
                        })];
                }
                else {
                    throw Error("Cannot parse dataStream id from resource ".concat(this.properties.resource));
                }
                return [2 /*return*/];
            });
        });
    };
    ConSysApiDatasourceUpdater.prototype.onTimeChanged = function (min, max) { };
    ConSysApiDatasourceUpdater.prototype.onError = function (err) { };
    ConSysApiDatasourceUpdater.prototype.destroy = function () {
        clearInterval(this.datastreamInterval);
    };
    return ConSysApiDatasourceUpdater;
}());
export default ConSysApiDatasourceUpdater;
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