computer-playbook/roles/web-app-pretix/README.md

# Pretix

## Description

Simplify event management with **Pretix**, an open-source ticketing system for conferences, workshops, and cultural events. Pretix empowers organizers with flexible ticket sales, attendee management, and secure payment integrations, all under your control.

## Overview

This role deploys Pretix using Docker, automating the installation, configuration, and management of your Pretix server. It integrates with an external PostgreSQL database, Redis for caching and sessions, and an NGINX reverse proxy. The role supports advanced features such as global CSS injection, Matomo analytics, OIDC authentication, and centralized logout, making it a powerful and customizable solution within the Infinito.Nexus ecosystem.

## Cosmos

The diagram places Pretix in the Infinito.Nexus cosmos: the components it deploys (capabilities), the central services it consumes (dependencies), and its outward reach (federation and bridged external networks).

```mermaid
flowchart LR
    subgraph deps [Dependencies]
        dep_svc_bkp_volume_2_local["svc-bkp-volume-2-local 💻"]
        dep_svc_db_postgres["svc-db-postgres 🐳🐝"]
        dep_svc_db_redis["svc-db-redis 🐳🐝"]
        dep_svc_net_tor["svc-net-tor 🐳🐝"]
        dep_web_app_dashboard["web-app-dashboard 🐳🐝"]
        dep_web_app_hermes["web-app-hermes 🐳🐝"]
        dep_web_app_keycloak["web-app-keycloak 🐳🐝"]
        dep_web_app_matomo["web-app-matomo 🐳🐝"]
        dep_web_app_openclaw["web-app-openclaw 🐳🐝"]
        dep_web_app_openwebui["web-app-openwebui 🐳🐝"]
        dep_web_app_prometheus["web-app-prometheus 🐳🐝"]
        dep_web_app_stalwart["web-app-stalwart 🐳🐝"]
        dep_web_svc_css["web-svc-css 💻"]
        dep_web_svc_logout["web-svc-logout 🐳🐝"]
    end
    subgraph role [web-app-pretix 🐳🐝]
        svc_sso["sso"]
        svc_logout["logout"]
        svc_dashboard["dashboard"]
        svc_matomo["matomo"]
        svc_email["email"]
        svc_redis["redis"]
        svc_postgres["postgres"]
        svc_pretix["pretix"]
        svc_css["css"]
        svc_prometheus["prometheus"]
        svc_tor["tor"]
        svc_container_backup["container_backup"]
        svc_pretixmcp["pretixmcp"]
        svc_openwebui["openwebui"]
        svc_hermes["hermes"]
        svc_openclaw["openclaw"]
        svc_flowise["flowise ❌"]
    end
    dep_svc_bkp_volume_2_local -. "0..1" .-> svc_container_backup
    dep_svc_db_postgres -. "0..1" .-> svc_postgres
    dep_svc_db_redis -. "0..1" .-> svc_redis
    dep_svc_net_tor -. "0..1" .-> svc_tor
    dep_web_app_dashboard -. "0..1" .-> svc_dashboard
    dep_web_app_hermes -. "0..1" .-> svc_hermes
    dep_web_app_keycloak -. "0..1" .-> svc_sso
    dep_web_app_matomo -. "0..1" .-> svc_matomo
    dep_web_app_openclaw -. "0..1" .-> svc_openclaw
    dep_web_app_openwebui -. "0..1" .-> svc_openwebui
    dep_web_app_prometheus -. "0..1" .-> svc_prometheus
    dep_web_app_stalwart -. "0..1" .-> svc_email
    dep_web_svc_css -. "0..1" .-> svc_css
    dep_web_svc_logout -. "0..1" .-> svc_logout
```

Solid `1:1` edges are fixed relationships; dashed `0..1` edges are conditional (enabled only in matching deployments); red `0..0` edges are turned off in this role. Node markers show the role's deploy modes (💻 host, 🐳 compose, 🐝 swarm); ❌ marks a service that is explicitly turned off, and ⚙️ an Ansible role dependency declared in `meta/main.yml`.

## Features

- **Pretix Installation:** Deploys Pretix in a dedicated Docker container.  
- **External PostgreSQL Database:** Configures Pretix to use a centralized PostgreSQL service.  
- **Redis Integration:** Adds Redis support for caching and session handling.  
- **NGINX Reverse Proxy Integration:** Provides secure access and HTTPS termination.  
- **OIDC Authentication:** Seamless integration with identity providers such as Keycloak.  
- **Centralized Logout:** Unified logout across applications in the ecosystem.  
- **Matomo Analytics & Global CSS:** Built-in support for analytics and unified styling.  

## Quick Setup

### Development

Clone, set up the workstation, and deploy Pretix onto the local stack:

```bash
git clone https://github.com/infinito-nexus/core.git
cd core
make onboard
make compose-deploy mode=reinstall apps=web-app-pretix full_cycle=false
```

### Production

Run the published image to provision the inventory and deploy Pretix to a managed server (the mounted volume persists the inventory):

```bash
APP=web-app-pretix
HOST=<your-server>
DOMAIN=<your-domain>
TLS_MODE=self_signed
SSH_PUBLIC_KEY="<your-ssh-public-key>"

docker run --rm -it \
  -v "$PWD/inventories:/etc/infinito.nexus/inventories" \
  -e APP="$APP" -e HOST="$HOST" -e DOMAIN="$DOMAIN" -e TLS_MODE="$TLS_MODE" -e SSH_PUBLIC_KEY="$SSH_PUBLIC_KEY" \
  ghcr.io/infinito-nexus/core/debian bash -c '
    INVENTORY=/etc/infinito.nexus/inventories/production
    infinito administration inventory provision "$INVENTORY" \
      --inventory-file "$INVENTORY/devices.yml" \
      --host "$HOST" \
      --include "$APP" \
      --vars "{\"TLS_MODE\": \"$TLS_MODE\", \"DOMAIN_PRIMARY\": \"$DOMAIN\", \"users\": {\"administrator\": {\"authorized_keys\": [\"$SSH_PUBLIC_KEY\"]}}}" &&
    infinito administration deploy dedicated "$INVENTORY/devices.yml" \
      --password-file "$INVENTORY/.password" \
      --diff -vv'
```

## Addons

Role-level extensions are declared in [`meta/addons/`](meta/addons/) following the unified addon contract (requirement 026).

| Addon | Mechanism | Default state | Bridges |
|---|---|---|---|
| `pretix-oidc` | plugin | enabled when `sso` is wired (`services.sso.enabled`) | `sso` |

The `oidc` plugin (`pretix-oidc`, pinned to `2.3.1`) is pip-installed at image build time and delivers Keycloak/OIDC login. It auto-enables whenever the SSO partner role (`web-app-keycloak`) is co-deployed and stays off otherwise.

## Further Resources

- [Pretix Official Website](https://pretix.eu/)  
- [Pretix Documentation](https://docs.pretix.eu/en/latest/)  
- [Pretix GitHub Repository](https://github.com/pretix/pretix)  

## Persona contract opt-outs

The shared `biber` and `administrator` persona helpers are declared blocked in [templates/playwright.env.j2](./templates/playwright.env.j2). The role provisions no pretix account at all — [tasks/main.yml](./tasks/main.yml) only deploys the stack — while pretix's native auth backend authenticates a pretix `User` row that is created by the interactive first-run setup. The `pretix-oidc` backend added on top lives on pretix's `/control` login page, whereas the role's base URL serves the public ticket shop that the baseline scenarios in [files/playwright/playwright.spec.js](./files/playwright/playwright.spec.js) assert. Seeding a backend user is the path back to a runnable persona journey.

## Credits

Implemented by **[Kevin Veen-Birkenbach](https://www.veen.world)**.
Part of the [Infinito.Nexus Project](https://s.infinito.nexus/code) and maintained by [Kevin Veen-Birkenbach](https://www.veen.world).
Licensed under the [Infinito.Nexus Community License (Non-Commercial)](https://s.infinito.nexus/license).