Get days in certain location from a time camp location report

TimeCampDailyLocationReport.js

/* *************************************************************************
 * Filter TimeCamp Location Report for specific Locations (e.g. to check 
 * home office days vs. on premise days).
 * *************************************************************************
 * Goto https://app.timecamp.com/app#/location
 * Filter the desired time span etc.
 * Inspect result of https://app.timecamp.com/location/index in your browser 
 * dev tools network analysis.
 * ************************************************************************* */

function onlyUnique(value, index, self) {
    return self.indexOf(value) === index;
}

Date.prototype.addDays = function(days) {
    var date = new Date(this.valueOf());
    date.setDate(date.getDate() + days);
    return date;
}

function getDates(startDate, stopDate) {
    var dateArray = new Array();
    var currentDate = startDate;
    while (currentDate <= stopDate) {
        dateArray.push(new Date (currentDate));
        currentDate = currentDate.addDays(1);
    }
    
    return dateArray;
}

var officeLocation = "GoogleMaps-tracking-accurate string to identify your office address";
var homeLocation = "GoogleMaps-tracking-accurate string to identify your home address";

var response = response ?? {}; // insert response from the ajax call in the header - can be several thousands of lines long.

var locationHistory = response.locationHistory;

var datesInOffice = locationHistory.filter(x => x.end_location_name.contains(officeLocation))
                                   .map(x => x.date)
                                   .filter(onlyUnique);

var datesInHomeOffice = locationHistory.filter(x => x.end_location_name.contains(homeLocation))
                                        .map(x => x.date)
                                        .filter(onlyUnique)
                                        .filter(x=>datesInOffice.indexOf(x) === -1);

var datesWithMigration = locationHistory.filter(x => x.end_location_name.contains(homeLocation))
                                        .map(x => x.date)
                                        .filter(onlyUnique)
                                        .filter(x=>datesInOffice.indexOf(x) != -1);

var allDates = locationHistory.map(x => x.date).filter(onlyUnique);
var allDateUnixTimestamps = allDates.map(x => Date.parse(x));
var latestDate = new Date(allDateUnixTimestamps[0]);
var earliestDate = new Date(allDateUnixTimestamps[allDateUnixTimestamps.length - 1]);

var allDatesInRange = getDates(earliestDate, latestDate);
var daysWithoutTrackedWorkLocation = allDatesInRange.map(x=>x.toISOString().split('T')[0])
                                                    .filter(x=>datesInOffice.indexOf(x) === -1)
                                                    .filter(x=>datesInHomeOffice.indexOf(x) === -1)
                                                    // filtering out weekends
                                                    .filter(x => [...new Array(5).keys()].contains(new Date(x).getDay() - 1));