KRAT

Availability Checker

Status: local cache only — add AptStatus sheet URL in Setup for team sync

In

Out

Any

Area

Select dates to check availability

📊 Google Sheets — Bookings

Publish your sheet as CSV (File → Share → Publish to web → Bookings sheet → CSV format). Only this app reads it.

1

File → Share → Publish to web → select Bookings sheet → format CSV → Publish → copy link

2

Paste below and click Sync. App auto-refreshes every 5 min.

GoogleMaps sheet CSV (for area auto-mapping from col G=apt#, col H=area#):

🧹 Apartment Status Sheet (AptStatus tab)

Create a new tab called AptStatus in your Google Sheet with 3 columns: A = Apt#, B = Status, C = Updated. Publish it as CSV and paste the link below. The app syncs every 2 min — all team devices see the same status.

1

In your Google Sheet: add a new tab, rename it AptStatus

2

Row 1: headers — AptNum, Status, Updated

3

File → Share → Publish to web → select AptStatus tab → CSV → Publish → copy link

4

Paste below and click Sync

5

In your Apps Script (the one already deployed for payments) add the code block shown below

🔧 Write Diagnostic

Tap to send a test write (Apt 999 → ready) using 3 different methods. Then check your AptStatus sheet for a "999" row.

Add this to your Google Apps Script (after the existing saveCell block):

if (e.parameter.action === 'setAptStatus') {
  var sheet = SpreadsheetApp.getActiveSpreadsheet()
                .getSheetByName('AptStatus');
  var aptnum = String(e.parameter.aptnum);
  var status = e.parameter.status;
  var data = sheet.getDataRange().getValues();
  for (var i = 1; i < data.length; i++) {
    if (String(data[i][0]) === aptnum) {
      sheet.getRange(i+1,2).setValue(status);
      sheet.getRange(i+1,3).setValue(new Date());
      return ContentService
        .createTextOutput('ok');
    }
  }
  sheet.appendRow([aptnum, status, new Date()]);
  return ContentService.createTextOutput('ok');
}

🔐 Google OAuth — Direct Sheet Writes

Connect once — KRAT stores your credentials securely on the server and reconnects automatically every time the app opens. No button needed after the first time.

Not connected — notes & payments save locally only

1

Go to Google Cloud Console → Credentials → + Create Credentials → OAuth client ID → type: Web application

2

Under Authorised JavaScript origins add your KRAT URL (e.g. https://krat.workers.dev). Also add http://localhost for local testing.

3

In the same project, enable the Google Sheets API.

4

Copy your Client ID (ends in .apps.googleusercontent.com) and paste below. Also paste your Spreadsheet ID from the sheet's edit URL: .../spreadsheets/d/{ID}/edit

5

Click Connect Google Account once — after consent, KRAT stores a refresh token on the server. From now on every device connects automatically when the app opens. No need to reconnect.

Google OAuth Client ID

Spreadsheet ID (from edit URL, not published URL)

Bookings tab name

Token expires after 1 hour — click Connect again when writes stop working. Data always saves locally as a backup.

🚐 Transfers IN Sheet

Publish your Transfers IN tab as CSV and paste below.
Required: B = Reservation code(s) · G = Y or N · time column below (default H=7).

Time column (A=0, B=1…)

🚐 Transfers OUT Sheet

Publish your Transfers OUT tab as CSV and paste below. Same structure — B = code(s), G = Y/N, time in same column as above.

Adjust if your Bookings sheet columns differ. Check the debug output below to find exact columns.

Guest Name (G=6)

Platform (H=7)

Status (I=8)

Amount (L=11)

Check-in (N=13)

Check-out (O=14)

Nights (P=15)

Guests / Pax (M=12)

Nationality (Q=16)

Phone (R=17)

Reservation ID (X=23)

Apt Name (AJ=35)

Area number (AQ=42)

Apt Number (AI=34)

Apt ID (AR=43)

Header rows to skip

🔍 Debug — inspect your sheet columns

Click to fetch your sheet and show the first 3 rows with column numbers — so you can verify every column mapping above.

🗺 Areas (Area Code → Name)

Edit area names. The number must match column AQ in your sheet.

🌐 Remote access from any phone or browser

Host this file for free on Netlify — takes 30 seconds. You get a permanent URL like krat-calendar.netlify.app that works on any device.

1

Download this HTML file to your computer

2

Go to app.netlify.com/drop (free, no account needed)

3

Drag the HTML file onto the page — you instantly get a URL

4

Open that URL on any phone or browser. On iPhone: Safari → Share → Add to Home Screen → it opens like an app

5

To update later: just drag the new version to the same Netlify site

📋 Add to Google Sheets (optional automation)

To have HostHub automatically push new reservations into your Google Sheet, use Zapier or Make.com:

1

Create a free Zapier account → New Zap

2

Trigger: HostHub — New Reservation

3

Action: Google Sheets — Add Row → map the fields to your Bookings sheet columns

4

This app then reads from your sheet automatically every 5 minutes — fully automated pipeline

🏠 Apartments

A/A number, area code, name. Edit or add new apartments here — changes save instantly.

A/A	Area	Name	Cap