InWhiteLine Scheduler Documentation

Project Features

• Contact Form Submission
• Thank You Email
• Admin Notification Email
• Schedule Meeting Option
• Real Google Meet Generation
• Google Calendar Invite
• OAuth2 Authentication
• User + Admin Attendee Support
• Production Ready Backend

Project Structure

inwhiteline-contact-project/
│
├── server.js
├── oauth.js
├── index.html
├── style.css
├── script.js
├── package.json
├── .env
├── tokens.json
└── node_modules/
      

Step 1 — Install Node.js

Download and install the latest LTS version of Node.js.

node -v
npm -v
      

Step 2 — Create Project

mkdir inwhiteline-contact-project
cd inwhiteline-contact-project
npm init -y
      

Step 3 — Install Packages

npm install express nodemailer cors dotenv googleapis
      

Step 4 — Google Cloud Setup

Open Google Cloud Console and create a new project.

Console URL

https://console.cloud.google.com/
      

Step 5 — Enable Google Calendar API

• Open APIs & Services
• Go to Library
• Search Google Calendar API
• Click Enable

Step 6 — OAuth Consent Screen

• Choose External
• Add App Name
• Add Support Email
• Add Developer Email

Step 7 — Create OAuth Credentials

• Create OAuth Client ID
• Select Web Application
• Name your OAuth App

Step 8 — Add Redirect URI

Authorized JavaScript Origin

http://localhost:8000
      

Authorized Redirect URI

http://localhost:8000/oauth2callback
      

Step 9 — Gmail App Password

• Enable 2-Step Verification
• Create App Password
• Use App Password in .env

EMAIL_USER=hello@inwhiteline.com
EMAIL_PASS=YOUR_APP_PASSWORD
      

Step 10 — Create OAuth File

Create OAuth server for token generation.

node oauth.js
      

Step 11 — Generate OAuth Tokens

Open browser and login using Google account.

http://localhost:8000/auth
      

After successful login:

tokens.json
      

will be generated automatically.

Step 12 — Create Server

Setup Express server with:

• Nodemailer
• Google Calendar API
• Google Meet generation
• Contact form APIs

Step 13 — Run Project

node server.js
      

http://localhost:8000
      

Final Working Flow

• User fills contact form
• User selects schedule meeting
• User selects date & time
• Google Meet auto generates
• Calendar invite sent
• User receives thank you email
• Admin receives consultation request

Common Errors & Fixes

EADDRINUSE

pkill node
      

Invalid Origin

Do not add callback URL in JavaScript origins.

open is not a function

Remove open() package and use:

res.redirect(url)
      

Security Notes

• Never upload .env
• Never upload tokens.json
• Never upload credentials.json

node_modules
.env
tokens.json
credentials.json
      

Production Deployment

• Deploy on VPS
• Use HTTPS
• Add MongoDB
• Add Admin Dashboard
• Add WhatsApp Notifications
• Add Slot Management