Nettu scheduler is a self-hosted calendar and scheduler server that aims to provide the building blocks for building calendar / booking apps with ease. It has a simple REST API and also a JavaScript SDK and Rust SDK.

It supports authentication through api keys for server - server communication and JSON Web Tokens for browser - server communication.

• Booking: Create a Service and register Users on it to make them bookable.
• Calendar Events: Supports recurrence rules, flexible querying and reminders.
• Calendars: For grouping Calendar Events.
• Freebusy: Find out when Users are free and when they are busy.
• Integrations: Connect your Nettu, Google and Outlook calendars
• Multi-tenancy: All resources are grouped by Accounts.
• Metadata queries: Add key-value metadata to your resources and then query on that metadata
• Webhooks: Notifying your server about Calendar Event reminders.

The server is using PostgreSQL for persistence, so we will need to spin up that first:

cd scheduler
docker-compose -f integrations/docker-compose.yml up -d

Now we are ready to start the nettu-scheduler server with cargo

cd scheduler
export ACCOUNT_API_KEY="REPLACE_ME"
export DATABASE_URL="postgresql://postgres:postgres@localhost:5432/nettuscheduler"
export PORT="3000"
cargo run

The ACCOUNT_API_KEY environment variable is going to create an Account (if it does not already exist) during server startup with the given key. Accounts act as tenants in the server, and it is possible to create multiple Accounts by using the CREATE_ACCOUNT_SECRET_CODE which you can provide as an environment variable.

Quick example of how to create and query a user

export SECRET_API_KEY="REPLACE ME WITH YOUR API KEY"

# Create a user with metadata
curl -X POST -H "Content-Type: application/json" -H "x-api-key: $SECRET_API_KEY" -d '{"metadata": { "groupId": "123" }}' http://localhost:5000/api/v1/user

# Get users by metadata
curl -H "x-api-key: $SECRET_API_KEY" "http://localhost:5000/api/v1/user/meta?key=groupId&value=123"

Please see below for links to more examples.

• Calendars and Events

• Booking

• Reminders

• Creating JWT for end-users

Contributions are welcome and are greatly appreciated!

MIT

• Lemmy for inspiration on how to use cargo workspace to organize a web app in rust.
• The author of this blog post for an excellent introduction on how to do telemetry in rust.