# RhemaWave

A Go-based fullscreen SDL2/OpenGL application for Linux kiosk systems. Displays proclamations with audio playback and animated visual patterns.

## Development

Development uses Nix for a reproducible build environment.

```bash
nix develop                                # enter dev shell
go build -o bin/rhemawave rhemawave.go     # build
./bin/rhemawave                            # run
./dev_scripts/reset.sh                     # reset database (if needed)
```

### Prerequisites

- Nix with flakes enabled
- A display server (X11/Wayland) and audio device for running the application

## Architecture

- **Page-based UI** — SDL2/OpenGL 3.3 fullscreen rendering with a page stack for navigation
- **Proclamation player** — scrolling text display with synchronized audio playback
- **Startup validation** — WiFi, TOS acceptance, email, license key checks
- **Singleton managers** — ShaderManager, FontManager, Logger (initialized once via `sync.Once`)

### Key Directories

```
bin/                          # build output (gitignored)
share/rhemawave/              # assets (fonts, shaders, proclamations, TOS)
internal/                     # Go source packages
packaging/                    # deployment configs (kiosk, updater, polkit)
dev_scripts/                  # developer utilities
```

### Runtime Data

Stored in `~/.local/share/rhemawave/`:
- `data.db` — SQLite database (config, proclamations, logs)
- `log.txt` — application log
- `license_key` — license key file

### Development Rules  
These rules must be followed during the development of RhemaWave to retain a 
maintainable application.  
1. The Application package is soley responsible for managing the database handler, and the 
configuration cache. Internal packages may update the configuration within the database, and 
then signal the application to refresh the cache via a callback function `refreshCache()`.

## Deployment

Deployed to kiosk hardware via NixOS-Anywhere. See `packaging/` for kiosk system configs.