appinsights-usage/lib/index.js

Javascript module to track usage with Application Insights

'use strict';

Object.defineProperty(exports, "__esModule", {
    value: true
});

var _applicationinsightsJs = require('applicationinsights-js');

var _away = require('away');

var _away2 = _interopRequireDefault(_away);

var _removeValue = require('remove-value');

var _removeValue2 = _interopRequireDefault(_removeValue);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var UsageTracker = {

    timespanOfInactivityToExpireSession: 1800000,
    windowId: Date.now(),

    init: function init(appInsightsOptions) {

        if (!window.localStorage) {
            return;
        }

        _applicationinsightsJs.AppInsights.downloadAndSetup(appInsightsOptions);

        var timer = (0, _away2.default)(this.timespanOfInactivityToExpireSession);

        if (this.allWindowsAreInactive()) {
            localStorage.setItem('startSessionTimestamp', Date.now());
        }

        this.markWindowAsActive();

        var self = this;

        window.onbeforeunload = function () {
            self.markWindowAsInactive();
            if (self.allWindowsAreInactive()) {
                self.sendSessionMetric(Date.now() - parseInt(localStorage.getItem('startSessionTimestamp')));
            }
        };

        timer.on('idle', function () {
            self.markWindowAsInactive();
            if (self.allWindowsAreInactive()) {
                self.sendSessionMetric(Date.now() - parseInt(localStorage.getItem('startSessionTimestamp')) - self.timespanOfInactivityToExpireSession);
            }
        });

        timer.on('active', function () {
            if (self.allWindowsAreInactive()) {
                localStorage.setItem('startSessionTimestamp', Date.now());
            }
            self.markWindowAsActive.bind(self)();
        });
    },

    allWindowsAreInactive: function allWindowsAreInactive() {
        return !localStorage.getItem('activeWindows') || localStorage.getItem('activeWindows').length == 0;
    },

    markWindowAsInactive: function markWindowAsInactive() {
        var activeWindows = localStorage.getItem('activeWindows');
        activeWindows = (0, _removeValue2.default)(activeWindows.split(","), this.windowId.toString()).toString();
        localStorage.setItem('activeWindows', activeWindows);
    },

    markWindowAsActive: function markWindowAsActive() {
        var activeWindows = localStorage.getItem('activeWindows') ? localStorage.getItem('activeWindows') : '';
        activeWindows += "," + this.windowId;
        localStorage.setItem('activeWindows', activeWindows);
    },

    sendSessionMetric: function sendSessionMetric(durationInMs) {
        _applicationinsightsJs.AppInsights.trackMetric("Session Duration (seconds)", Math.round(durationInMs / 1000), 1);
        _applicationinsightsJs.AppInsights.flush();
        //for logging only:
        // localStorage.setItem('Sessions', localStorage.getItem('Sessions')+","+Math.round(durationInMs/1000));
    }
};

exports.default = UsageTracker;