# Tessera

Open-source ticketing system — Request Tracker's paradigm rebuilt in modern TypeScript.

## Architecture

```
tessera/
├── src/                    # Backend: Bun + Hono + Drizzle ORM
│   ├── index.ts            # Hono server entry (port 9876)
│   ├── config.ts           # Zod-validated env config
│   ├── db/                 # Drizzle ORM schema + migrations
│   ├── routes/             # REST API endpoints
│   ├── models/             # TypeScript types + Zod schemas
│   ├── scrip/              # Scrip engine (prepare/commit two-phase)
│   └── lifecycle/          # State machine validator
├── web/                    # Frontend: Next.js 16 + shadcn/ui
│   ├── src/app/            # App Router pages
│   ├── src/components/     # Reusable components + widgets
│   └── src/lib/            # API client + types + utils
├── drizzle/                # SQL migration files
└── docs/                   # Architecture + design specs
```

## Stack

**Backend:** Bun runtime, Hono web framework, Drizzle ORM, PostgreSQL 17, Zod validation, Handlebars templates, nodemailer

**Frontend:** Next.js 16 App Router (Turbopack), shadcn/ui (Tailwind CSS), next-themes, date-fns, lucide-react icons

**Fonts:** Inter (variable), JetBrains Mono

## Running Locally

### Prerequisites
- Bun (`nix-shell -p bun` or install globally)
- Node.js 22+ (`nix-shell -p nodejs_22`)
- Docker (for PostgreSQL)
- PostgreSQL container: `docker run -d --name tessera-db -e POSTGRES_USER=tessera -e POSTGRES_PASSWORD=*** -e POSTGRES_DB=tessera -p 127.0.0.1:5433:5432 postgres:17-alpine`

### Start backend
```bash
cd ~/projects/tessera
cp .env.example .env
npm run dev:backend   # Starts API on port 9876
```

### Run migrations
```bash
npm run db:migrate
npm run db:seed         # Demo data
npm run db:seed:reset   # Reset + re-seed
```

### Start frontend
```bash
cd web
npm install             # Use npm, NOT bun
bun run dev             # Dev server on 127.0.0.1:3100 (HMR)
```

## API Endpoints

All endpoints on port 9876. Frontend proxies `/api/*` via `next.config.ts`.

| Method | Path | Description |
|--------|------|-------------|
| GET | /health | Health check |
| GET | /tickets | List tickets (?queue_id=&status=&owner_id=&team_id=&q=&limit=&cf.*=) |
| POST | /tickets | Create ticket |
| GET | /tickets/:id | Get ticket with custom fields |
| PATCH | /tickets/:id | Update ticket (validates lifecycle, runs scrips, returns scrip_results) |
| POST | /tickets/:id/preview | Dry-run scrips for status change |
| POST | /tickets/:id/comment | Add comment to ticket |
| GET | /tickets/:id/transactions | List ticket transactions |
| GET/POST/PATCH | /queues | CRUD queues |
| GET/POST/PATCH/DELETE | /scrips | CRUD scrips |
| GET/POST/PATCH | /custom-fields | CRUD custom fields |
| GET/POST/PATCH | /lifecycles | CRUD lifecycles |
| GET/POST/PATCH/DELETE | /users | CRUD users |
| GET/POST/PATCH/DELETE | /templates | CRUD templates + POST /preview |
| GET/POST/PATCH/DELETE | /views | CRUD saved views |
| GET/POST/PATCH/DELETE | /teams | CRUD teams + POST/DELETE members |
| GET/POST/PATCH/DELETE | /dashboards | CRUD dashboards + widgets + widget data |

## Key Design Decisions

- **Ticket IDs are sequential integers** (1, 2, 3...), formatted as `TKT-0001` for display. No UUIDs.
- **Transaction-centric:** Every state change creates a transaction record. The scrip engine runs on transactions.
- **Two-phase scrip engine:** Prepare (no side effects) then Commit (execute actions). Supports dry-run mode.
- **Lifecycle state machines:** Per-queue configurable status transitions with wildcard support.
- **SQL-level filtering:** Ticket filters (status, queue, owner, team, custom fields) pushed to PostgreSQL via Drizzle WHERE clauses.
- **No ORM for frontend:** Drizzle is only on the backend. Frontend uses a typed fetch wrapper (`web/src/lib/api.ts`).
- **Dev server over production:** Use `bun run dev` (port 3100) with HMR. Build+restart only when dev server has issues.
- **Design consistency:** See `docs/design-system.md` for the design rules applied across the app.

## Git Workflow

Repo: `https://git.gjermund.xyz/gjermund/tessera`

```bash
git remote set-url origin https://gjermund:TOKEN@git.gjermund.xyz/gjermund/tessera.git
```

## Common Issues

- **Frontend shows skeleton/blank page:** Dev server may have HMR issues. Kill port 3100, rebuild with `npm run build`, restart with `npm run start`.
- **Backend not running on 9876:** Restart with `bun run src/index.ts`. Check port with `ss -tlnp | grep 9876`.
- **Database connection refused:** Docker container may be stopped. `docker start tessera-db`.
- **Build errors after migration:** Run `bun run src/db/migrate.ts` to apply new migrations.