# Pole Dance Championships App — Technical Document

## 1. Project Overview

### Problem

Pole dance championships lack dedicated tools for organizers and participants. Organizers rely on Instagram posts to announce events, and registrations are managed via Google Forms — leading to:

- **No visibility** — Participants can't track their registration status in one place.
- **Scattered info** — Dates, rules, and results are buried across Instagram posts.
- **No access control** — Anyone can register; organizers need a way to accept or reject participants.

### Solution

A **members-only mobile app** for pole dance championship participants and organizers.

- New users register and wait for admin approval before accessing the app.
- Championship announcements are auto-imported from Instagram (Graph API).
- Members browse championships, submit registrations, and track their status.
- Organizers accept, reject, or waitlist participants and publish the final participant list.
- Push notifications alert members when results are published.

---

## 2. User Roles

| Role | Access |
|---|---|
| **Member** | Browse championships, register, track own registration status |
| **Organizer** | All of the above + manage registrations, publish participant lists |
| **Admin** | All of the above + approve/reject new member accounts |

New accounts start as `pending` and must be approved by an admin before they can use the app.

---

## 3. Tech Stack

| Layer | Technology |
|---|---|
| **Mobile** | React Native + TypeScript (Expo managed workflow) |
| **Navigation** | React Navigation v6 |
| **Server state** | TanStack React Query v5 |
| **Client state** | Zustand |
| **Backend** | FastAPI (Python, async) |
| **ORM** | SQLAlchemy 2.0 async |
| **Database** | SQLite (local dev) / PostgreSQL (production) |
| **Migrations** | Alembic |
| **Auth** | JWT — access tokens (15 min) + refresh tokens (7 days, rotation-based) |
| **Instagram sync** | Instagram Graph API, polled every 30 min via APScheduler |
| **Push notifications** | Expo Push API (routes to FCM + APNs) |
| **Token storage** | expo-secure-store (with in-memory cache for reliability) |

---

## 4. Architecture

```
┌─────────────────────┐        ┌──────────────────────────────┐
│   React Native App  │◄──────►│   FastAPI Backend            │
│   (Expo Go / APK)   │  HTTPS │   /api/v1/...                │
└─────────────────────┘        │                              │
                               │  ┌──────────────────────┐   │
                               │  │  APScheduler         │   │
                               │  │  - Instagram poll/30m│   │
                               │  │  - Token refresh/7d  │   │
                               │  └──────────────────────┘   │
                               │                              │
                               │  ┌──────────────────────┐   │
                               │  │  SQLite / PostgreSQL  │   │
                               │  └──────────────────────┘   │
                               └──────────────────────────────┘
```

---

## 5. Data Model

### User
```
id            UUID (PK)
email         String (unique)
full_name     String
phone         String (nullable)
hashed_password String
role          Enum: member | organizer | admin
status        Enum: pending | approved | rejected
expo_push_token String (nullable)
created_at    DateTime
updated_at    DateTime
```

### Championship
```
id                    UUID (PK)
title                 String
description           String (nullable)
location              String (nullable)
event_date            DateTime (nullable)
registration_open_at  DateTime (nullable)
registration_close_at DateTime (nullable)
status                Enum: draft | open | closed | completed
source                Enum: manual | instagram
instagram_media_id    String (nullable, unique)
image_url             String (nullable)
raw_caption_text      Text (nullable)
created_at            DateTime
updated_at            DateTime
```

### Registration
```
id               UUID (PK)
championship_id  UUID (FK → Championship)
user_id          UUID (FK → User)
category         String (nullable)
level            String (nullable)
notes            Text (nullable)
status           Enum: submitted | accepted | rejected | waitlisted
submitted_at     DateTime
decided_at       DateTime (nullable)
```

### ParticipantList
```
id               UUID (PK)
championship_id  UUID (FK → Championship, unique)
published_by     UUID (FK → User)
is_published     Boolean
published_at     DateTime (nullable)
notes            Text (nullable)
```

### RefreshToken
```
id           UUID (PK)
user_id      UUID (FK → User)
token_hash   String (SHA-256, unique)
expires_at   DateTime
revoked      Boolean
created_at   DateTime
```

### NotificationLog
```
id               UUID (PK)
user_id          UUID (FK → User)
championship_id  UUID (FK → Championship, nullable)
title            String
body             String
sent_at          DateTime
status           String
```

---

## 6. API Endpoints

### Auth
| Method | Path | Description |
|---|---|---|
| POST | `/api/v1/auth/register` | Register new account (status=pending) |
| POST | `/api/v1/auth/login` | Login, get access + refresh tokens |
| POST | `/api/v1/auth/refresh` | Refresh access token |
| POST | `/api/v1/auth/logout` | Revoke refresh token |
| GET | `/api/v1/auth/me` | Get current user |

### Championships
| Method | Path | Access |
|---|---|---|
| GET | `/api/v1/championships` | Approved members |
| GET | `/api/v1/championships/{id}` | Approved members |
| POST | `/api/v1/championships` | Organizer+ |
| PATCH | `/api/v1/championships/{id}` | Organizer+ |
| DELETE | `/api/v1/championships/{id}` | Admin |

### Registrations
| Method | Path | Access |
|---|---|---|
| POST | `/api/v1/championships/{id}/register` | Approved member |
| GET | `/api/v1/championships/{id}/registrations` | Organizer+ |
| PATCH | `/api/v1/registrations/{id}/status` | Organizer+ |
| GET | `/api/v1/registrations/mine` | Member (own only) |
| DELETE | `/api/v1/registrations/{id}` | Member (own, before decision) |

### Participant Lists
| Method | Path | Access |
|---|---|---|
| GET | `/api/v1/championships/{id}/participant-list` | Approved member |
| PUT | `/api/v1/championships/{id}/participant-list` | Organizer+ |
| POST | `/api/v1/championships/{id}/participant-list/publish` | Organizer+ |
| POST | `/api/v1/championships/{id}/participant-list/unpublish` | Organizer+ |

### Users (Admin)
| Method | Path | Description |
|---|---|---|
| GET | `/api/v1/users` | List all users |
| PATCH | `/api/v1/users/{id}/status` | Approve/reject member |
| PATCH | `/api/v1/users/me/push-token` | Register push token |

---

## 7. Mobile Screens

### Auth Flow
- **LoginScreen** — Email + password login
- **RegisterScreen** — Full name, phone, email, password
- **PendingApprovalScreen** — Shown after register until admin approves

### App (approved members)
- **ChampionshipListScreen** — All championships with status badges
- **ChampionshipDetailScreen** — Full info + registration button
- **RegistrationFormScreen** — Category, level, notes
- **ProfileScreen** — User info, logout

### Navigation
```
No user ──► AuthStack (Login / Register)
Pending ──► PendingApprovalScreen
Approved ──► AppStack (Championships / Profile)
```

---

## 8. Instagram Integration

### How It Works
1. Admin configures `INSTAGRAM_USER_ID` and `INSTAGRAM_ACCESS_TOKEN` in `.env`.
2. APScheduler polls the Instagram Graph API every 30 minutes.
3. New media posts are parsed: title (first line of caption), location (`Место:` / `Location:` prefix), dates (regex for RU + EN date formats).
4. New championships are created with `status=draft` for admin review.
5. Long-lived tokens are refreshed weekly automatically.

### Parsing Logic
- **Title** — First non-empty line of the caption.
- **Location** — Line starting with `Место:` or `Location:`.
- **Date** — Regex matches formats like `15 апреля 2026`, `April 15, 2026`, `15.04.2026`.
- **Deduplication** — Championships are matched by `instagram_media_id`.

---

## 9. Local Development Setup

### Prerequisites
- Python 3.11+
- Node.js 18+
- Expo Go app on phone

### Backend
```bat
cd backend
python -m venv .venv
.venv\Scripts\pip install -r requirements.txt
alembic upgrade head
python scripts/create_admin.py   # creates admin@poledance.app / Admin1234
uvicorn app.main:app --host 0.0.0.0 --port 8000 --reload
```

Or use: `start-backend.bat`

### Mobile
```bat
cd mobile
npm install
npx expo start --lan --clear
```

Or use: `start-mobile.bat`

### Environment (backend/.env)
```
DATABASE_URL=sqlite+aiosqlite:///./poledance.db
SECRET_KEY=dev-secret-key-change-before-production-32x
INSTAGRAM_USER_ID=
INSTAGRAM_ACCESS_TOKEN=
INSTAGRAM_POLL_INTERVAL=1800
```

### Environment (mobile/.env)
```
EXPO_PUBLIC_API_URL=http://<your-local-ip>:8000/api/v1
```

### Test Accounts
| Email | Password | Role | Status |
|---|---|---|---|
| admin@poledance.app | Admin1234 | admin | approved |
| anna@example.com | Member1234 | member | approved |
| maria@example.com | Member1234 | member | approved |
| elena@example.com | Member1234 | member | pending |

---

## 10. Known Limitations (Local Dev)

- **SQLite** is used instead of PostgreSQL — change `DATABASE_URL` for production.
- **Push notifications** don't work in Expo Go SDK 53 — requires a development build.
- **Instagram polling** requires a valid Business/Creator account token.
- Windows Firewall must allow inbound TCP on port 8000 for phone to reach the backend.

---

## 11. Future Features

- **Web admin panel** — Browser-based dashboard for organizers to manage registrations and championships.
- **In-app notifications feed** — History of received push notifications.
- **Calendar sync** — Export championship dates to phone calendar.
- **Production deployment** — Docker + PostgreSQL + nginx + SSL.
- **OCR / LLM parsing** — Better extraction of championship details from Instagram images and captions.
- **Multi-organizer** — Support multiple Instagram accounts for different championships.