Google Sheets Backend

Google Drive

Google Calendar

Step 1 — Create your Google Sheet

Go to sheets.google.com → New spreadsheet → Name it TransplantOS_DB.
Create these tabs (sheets): Patients Evaluations Waitlist Logbook MDT OPD Events
Copy the Spreadsheet ID from the URL: docs.google.com/spreadsheets/d/[THIS PART]/edit

Step 2 — Create the Apps Script web app

In the Sheet → Extensions → Apps Script → delete default code → paste this:

const SHEET_ID = 'YOUR_SPREADSHEET_ID_HERE';

// Headers for each tab
const HEADERS = {
  Patients:    ['id','name','mrn','age','sex','dob','bg','phone','address','diag','txDate','txType','status','history','plan'],
  Evaluations: ['id','name','mrn','age','sex','bg','type','indication','meld','ctp','status','date','notes','pairedId','pairRelation','txDate'],
  Waitlist:    ['id','reg','name','age','sex','bg','meld','ctp','indication','date','status','notes'],
  Logbook:     ['id','date','patient','agesex','bg','procedure','category','role','leadName','blood','duration','graft','grwr','cit','wit','outcome','thirtyDay','notes'],
  MDT:         ['id','date','patient','type','decision','attendees','summary','steps'],
  OPD:         ['id','date','count','surgeon','location','notes'],
  Events:      ['id','date','time','title','type','surgeon','patient','notes'],
  Leaves:      ['id','surgeon','from','to','reason','notes']
};

function doGet(e) {
  try {
    const tab = e.parameter.tab || 'Patients';
    const ss = SpreadsheetApp.openById(SHEET_ID);
    let sheet = ss.getSheetByName(tab);
    if (!sheet) {
      sheet = ss.insertSheet(tab);
      if (HEADERS[tab]) sheet.appendRow(HEADERS[tab]);
    }
    const data = sheet.getDataRange().getValues();
    return ContentService
      .createTextOutput(JSON.stringify({ ok: true, data }))
      .setMimeType(ContentService.MimeType.JSON);
  } catch(err) {
    return ContentService
      .createTextOutput(JSON.stringify({ ok: false, error: err.message }))
      .setMimeType(ContentService.MimeType.JSON);
  }
}

function doPost(e) {
  try {
    const payload = JSON.parse(e.postData.contents);
    const ss = SpreadsheetApp.openById(SHEET_ID);
    const tab = payload.tab;
    let sheet = ss.getSheetByName(tab);
    if (!sheet) {
      sheet = ss.insertSheet(tab);
      if (HEADERS[tab]) sheet.appendRow(HEADERS[tab]);
    }

    if (payload.action === 'sync') {
      // Full replace: clear data rows, write all rows
      const lastRow = sheet.getLastRow();
      if (lastRow > 1) sheet.deleteRows(2, lastRow - 1);
      if (payload.rows && payload.rows.length > 0) {
        sheet.getRange(2, 1, payload.rows.length, payload.rows[0].length)
             .setValues(payload.rows);
      }
    } else if (payload.action === 'upsert') {
      // Insert or update a single row by id (column 1)
      const id = String(payload.row[0]);
      const data = sheet.getDataRange().getValues();
      let found = false;
      for (let i = 1; i < data.length; i++) {
        if (String(data[i][0]) === id) {
          sheet.getRange(i + 1, 1, 1, payload.row.length).setValues([payload.row]);
          found = true; break;
        }
      }
      if (!found) sheet.appendRow(payload.row);
    } else if (payload.action === 'delete') {
      const id = String(payload.id);
      const data = sheet.getDataRange().getValues();
      for (let i = data.length - 1; i >= 1; i--) {
        if (String(data[i][0]) === id) { sheet.deleteRow(i + 1); break; }
      }
    }

    return ContentService
      .createTextOutput(JSON.stringify({ ok: true }))
      .setMimeType(ContentService.MimeType.JSON);
  } catch(err) {
    return ContentService
      .createTextOutput(JSON.stringify({ ok: false, error: err.message }))
      .setMimeType(ContentService.MimeType.JSON);
  }
}

Step 3 — Deploy as web app

In Apps Script → Deploy → New deployment
Type: Web app
Execute as: Me
Who has access: Anyone within [your organisation] (or "Anyone" for external)
→ Click Deploy → Copy the Web App URL
Paste it in the field below and click Save.

Step 4 — Connect the app

Save & Connect

Not connected

Step 5 — Share with your team

Save this HTML file anywhere accessible to your team (email it, host on Google Sites, hospital intranet, or use Netlify free tier for HTTPS). Each team member opens the file and uses the same Google Sheets database. Share the Sheet with team member emails for direct spreadsheet access.

Security note: For patient data, restrict Apps Script access to "Anyone within [your Google Workspace domain]" and enable 2-step verification on all accounts. Comply with DISHA 2023 / IT Act requirements for health data storage in India.