Chatat

WhatsApp-style chat + Notion-style document collaboration mobile app.

Tech Stack

• Backend: Go 1.23+ (Chi, pgx, Redis, WebSocket, JWT, zerolog)
• Frontend: React Native / Expo (TypeScript, Zustand, React Navigation)
• Database: PostgreSQL 16, Redis 7
• Infrastructure: Docker Compose

Prerequisites

• Go 1.23+
• Node.js 20+
• Docker & Docker Compose
• Xcode (for iOS)
• Android Studio (for Android)

Getting Started

1. Clone & Setup

git clone https://github.com/otoritech/chatat.git
cd chatat

2. Start Database Services

make db-up

This starts PostgreSQL (port 5433) and Redis (port 6380) via Docker Compose.

3. Start Backend Server

cp server/.env.example server/.env
make dev

Server runs at http://localhost:8080. Health check: GET /health.

4. Start Mobile App

cd mobile
npm install
npx expo start

5. Verify Setup

# Backend health check
curl http://localhost:8080/health

# Run tests
make test

# Run linter
make lint

# TypeScript check
make mobile-typecheck

Development Commands

Command	Description
make dev	Start Go server
make build	Build Go binary
make test	Run Go tests
make lint	Run golangci-lint
make vet	Run go vet
make fmt	Format Go code
make db-up	Start PostgreSQL + Redis
make db-down	Stop PostgreSQL + Redis
make db-reset	Reset database (drop + recreate)
make mobile-start	Start Expo dev server
make mobile-typecheck	TypeScript type check
make check	Run all checks (vet + lint + test + typecheck)

Project Structure

chatat/
├── server/          # Go backend (API + WebSocket)
├── mobile/          # React Native / Expo frontend
├── docs/            # Development documentation
├── plan/            # Implementation plan (27 phases)
└── docker-compose.yml

See docs/project-structure.md for detailed structure.

Documentation

• Project Structure
• Naming Conventions
• Error Handling
• Design Patterns
• Git Workflow
• Testing Strategy
• Go Style Guide
• React Native Style Guide

License

Private - All rights reserved.