1. Complete System Architecture (CI3 + Flutter + Backblaze B2 + cPanel)

Your system will have 4 major components:

Flutter Mobile App (Android + iOS)

CodeIgniter 3 Backend + API

Firebase Real-Time Chat

CI3 Admin Panel

Backblaze B2 Storage

cPanel Deployment Setup

Ei structure fully white-label, meaning:

Just logo + name change kore instantly new client ke deliver korte parba.

2. Full Feature List for Resell-Ready Dating App
A. Mobile App Features (Flutter)

Login/Signup (email/phone)

OTP verification (optional)

Edit profile (photos, bio, interests, gender, age)

Photo upload (Backblaze B2)

Swipe matching

Browse discovery

Location-based matching

Real-time chat (Firebase)

Voice/Video call (WebRTC)

Push notifications (FCM)

Block/report users

Premium filters

Boost & Spotlight

Who-liked-you feature

Online/offline status

3. Backend System in CodeIgniter 3 (CI3)

CI3 is lightweight, fast, এবং shared hosting/cPanel-এর সাথে perfect.

Backend Responsibilities:

REST API for mobile app

User authentication

Profile + photo endpoints

Match logic (like/dislike)

Block/report system

Subscription validation

Admin panel APIs

Settings management

App branding settings

Payment log storing

4. Database Structure (MySQL on cPanel)
Tables:

users

user_profiles

user_photos

likes (like/dislike/match)

matches

blocks

reports

subscriptions

app_settings (branding)

admin_users

Important:

Chat messages stored in Firebase → only store metadata in MySQL.

5. Real-Time Chat System (Firebase)

Use:

Firebase Firestore for messages

Firebase Storage only for voice notes (optional)

Firebase Cloud Messaging (FCM) for notifications

Why Firebase?

No server load

Fastest chat delivery

Highly scalable

Easy to clone per client (just create new Firebase project)

Chat Features:

Instant messaging

Typing indicator

Seen/Delivered status

Online/offline presence

Image sending

Push notification per message

6. Voice & Video Calling (WebRTC)
Setup:

Flutter WebRTC plugin

STUN server (Google free STUN servers)

TURN server optional (for reliability)

For low-cost resale → start with STUN only.

7. Storage System: Backblaze B2

Better and cheaper than AWS S3.

Use-cases:

Profile photos

Gallery images

Video clips (optional)

Verification photos

Setup Steps:

Create Backblaze B2 bucket

Enable public/private access

Create application key

Connect CI3 via B2 SDK

Connect Flutter via pre-signed URL upload

Advantages:

Very cheap

Fast CDN supported

Perfect for image-heavy dating apps

8. Admin Panel (CodeIgniter 3)

Admin panel features:

User Management

View users

Ban users

Approve profiles

Block list

Reports list

Content Moderation

Flagged user list

View profile photos

Delete abusive content

App Controls

Free swipe limit

Premium features

Subscription pricing

Push campaigns (send notifications to all users)

Branding Management (White-label)

App name

Logo

Primary color

Splash image URL

Contact email

Dashboard & Analytics

Daily active users

Matches per day

Registrations

Subscription revenue

Gender ratio

9. cPanel Deployment Guide (CI3 Backend + Admin)

Your workflow will be:

Step 1: Create a subdomain

Example:
api.clientdomain.com
admin.clientdomain.com

Step 2: Upload CodeIgniter ZIP

Upload via File Manager

Extract to public_html/api/

Step 3: Create Database

Go to MySQL Database Wizard

Create DB + user

Assign permissions

Import SQL schema

Step 4: Update CI3 config

config.php (base_url)

database.php (hostname, DB name, user, pass)

Step 5: Set Backblaze Credentials

In application/config/storage.php:

B2_KEY_ID

B2_APPLICATION_KEY

B2_BUCKET_NAME

Step 6: Set Security Headers

JWT secret key

API rate limiting

Image validation rules

Step 7: Connect Firebase

In admin panel settings:

Firebase Server Key

Project ID

App ID

10. Development Workflow (Most Efficient)
Step 1: Build Flutter UI

Make UI reusable + easily themeable.

Step 2: Develop CI3 API

auth

profile

photos

likes/dislikes

match logic

block/report

app settings

subscription

Step 3: Implement Firebase Chat

chat room creation

messages

FCM notifications

Step 4: Implement WebRTC calling

call start

call end

call logs

Step 5: Build Admin Panel

User approval

Reports handling

Settings

Branding

Step 6: Connect Backblaze B2

Media upload

URL return

Step 7: White-label settings

Make branding dynamic.

11. Resell Workflow (Fast Delivery)

After app is built:

For each new client:

Add new graphics (logo, splash, colors)

Create new Firebase project

Create new B2 bucket (optional)

Deploy backend to new cPanel folder

Upload branding data in admin panel

Generate APK/IPA

Deliver within 1–2 hours

12. Your Final Tech Stack (Optimized for Reselling)
Mobile App

Flutter

Firebase FCM

Firebase Firestore

WebRTC

Backblaze B2 (upload endpoints)

Backend

CodeIgniter 3

MySQL

Backblaze B2 SDK

JWT Auth

cPanel hosting

Admin Panel

CI3 + AdminLTE

Role-based access

Analytics chart

White-label config system