ActivityHive

ActivityHive is a case study made for the purpose of exploring functional & AI-Driven web development using F# and TypeScript.

The project itself is a hub for social events. It contains all the basic functionality that you would expect a website to have. Examples include activity management, user profiles, photo uploads, authentication, real-time comments, following system, and more simple stuff like that.

AI

Below is a list of the AI Agents that has been used to develop this project. Most of the code in the project is AI-generated. All of them have different trade-offs, so it is difficult to directly rank them, but I will say that Claude Opus 4.6 (expensive) and Claude Sonnet 4.6 are the best on the market right now for software development IMO.

Agents
Claude Opus 4.6
Claude Sonnet 4.6
GPT-5
GPT-4o
GPT-4o mini
o3 mini
Grok CLI
Gemini CLI

Getting Started

Prerequisites

• .NET 10 SDK
• Node.js 18+
• PostgreSQL 14+
• (Optional) Cloudinary account for photo hosting
• (Optional) SendGrid API key for email
• (Optional) Facebook App credentials for OAuth

Backend

1. Clone the repository

   git clone https://github.com/KNPhilip/activityhive.git
   cd activityhive

2. Configure the database

   Update the connection string in src/API/appsettings.Development.json:

   "ConnectionStrings": {
     "DefaultConnection": "Server=localhost; Port=5432; User=admin; Password=secret; Database=activityhive"
   }

3. Configure optional services (Cloudinary, SendGrid, Facebook) in src/API/appsettings.Development.json.

4. Restore and run

   dotnet restore ActivityHive.sln
   dotnet run --project src/API/API.fsproj

   The API listens on https://localhost:5000. Swagger UI is available at https://localhost:5000/swagger.

Frontend

cd client-app
npm install
npm run dev

The React app starts at http://localhost:5173 and proxies API requests to https://localhost:5000.

Running Tests

# Unit tests
dotnet test tests/UnitTests/UnitTests.fsproj

# Integration tests (requires Docker)
dotnet test tests/IntegrationTests/IntegrationTests.fsproj

# All tests
dotnet test ActivityHive.sln

API Overview

Endpoint	Description
GET /api/activities	Paginated activity list (supports going/hosting filter)
GET /api/activities/{id}	Activity detail
POST /api/activities	Create activity
PUT /api/activities/{id}	Edit activity (host only)
DELETE /api/activities/{id}	Delete activity (host only)
POST /api/activities/{id}/attend	Toggle attendance
GET /api/profile/{username}	User profile
PUT /api/profile	Edit own profile
GET /api/profile/{username}/activities	User's activities
POST /api/photo	Upload photo
DELETE /api/photo/{id}	Delete photo
POST /api/photo/{id}/setMain	Set main profile photo
POST /api/follow/{username}	Follow / unfollow user
GET /api/follow/{username}	Followers / following list
POST /api/auth/register	Register
POST /api/auth/login	Login
POST /api/auth/facebook-login	Facebook OAuth
POST /api/auth/refresh-token	Refresh JWT
WS /chat?activityId={id}	SignalR real-time comments

Docker

# Build
docker build -t activityhive .

# Run
docker run -p 8080:8080 \
  -e ConnectionStrings__DefaultConnection="<postgres_connection_string>" \
  -e TokenKey="<jwt_secret>" \
  -e Cloudinary__CloudName="<cloud_name>" \
  -e Cloudinary__ApiKey="<api_key>" \
  -e Cloudinary__ApiSecret="<api_secret>" \
  -e Sendgrid__Key="<sendgrid_key>" \
  -e Facebook__ApiSecret="<facebook_secret>" \
  activityhive

Deployment

The project is configured to deploy to Fly.io and can be reached here: https://activityhive.fly.dev