background.js

background.js

// The following sample code uses modern ECMAScript 6 features 
// that aren't supported in Internet Explorer 11.
// To convert the sample for environments that do not support ECMAScript 6, 
// such as Internet Explorer 11, use a transpiler such as 
// Babel at http://babeljs.io/.
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
    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) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
        step((generator = generator.apply(thisArg, _arguments || [])).next());
    });
};

const hubUrl = "http://pi:5000/hubs/piMonitR"

var connection = new signalR.HubConnectionBuilder()
    .withUrl(hubUrl, { logger: signalR.LogLevel.Information })
    .build();

// We need an async function in order to use await, but we want this code to run immediately,
// so we use an "immediately-executed async function"
(() => __awaiter(this, void 0, void 0, function* () {
    try {
        yield connection.start();
    }
    catch (e) {
        console.error(e.toString());
    }
}))();

connection.on("ReceiveNotification", (message) => {
    new Notification(message, {
        icon: '48.png',
        body: message
    });
});

chrome.runtime.onConnect.addListener(function (externalPort) {
    externalPort.onDisconnect.addListener(function () {
        connection.invoke("StopStream").catch(err => console.error(err.toString()));
    });
});