# After-Hours Shift Manager

Slack bot for managing after-hours on-call shifts at Sea Haven Industries. Employees can pick up, drop, and swap shifts directly from Slack. Changes automatically update 3CX ring group 800 routing.

## How It Works

A recurring weekly schedule assigns employees to after-hours phone duty (5pm-8am). Any unassigned day shows as **Available** in Slack with a pickup button. When someone picks up or drops a shift for today, the 3CX phone system is updated immediately. Future changes take effect when the 3CX scheduler runs at 8am.

## Slack Commands

| Command | Description |
|---|---|
| `/oncall` | Show this week's schedule |
| `/oncall next` | Show next week's schedule |
| `/oncall pick <date>` | Pick up an available shift |
| `/oncall drop <date>` | Drop your shift (marks it available) |
| `/oncall swap <date> @person` | Hand your shift to someone else |
| `/oncall register <ext>` | Link your Slack account to your phone extension |
| `/oncall roster` | Show all employees and their link status |
| `/oncall help` | Show help |

Dates accept: `today`, `tomorrow`, `monday`-`sunday`, `4/5`, `2026-04-05`

## Architecture

- **Runtime**: Python 3.12 on AWS Lambda (via API Gateway)
- **Data**: DynamoDB single-table (`afterhours-shifts`)
- **IaC**: AWS SAM (`template.yaml`)
- **Slack**: Slack Bolt framework with `/oncall` slash command
- **3CX Integration**: Invokes the `3cx-ring-group-scheduler` Lambda for same-day changes; the scheduler reads DynamoDB for future dates

### DynamoDB Schema

Single table with `PK` / `SK` keys:

| PK | SK | Description |
|---|---|---|
| `ROSTER` | `<extension>` | Employee: name, extension, slack_user_id |
| `WEEKLY` | `<DayName>` | Default weekly schedule: extension, name |
| `OVERRIDE` | `<YYYY-MM-DD>` | Date override from pickup/drop (or `OPEN`) |
| `CONFIG` | `CONFIG` | Settings: ring_group, fallback_extension |

## Deployment

See [SETUP.md](SETUP.md) for full deployment and Slack app creation instructions.

Quick reference:

```bash
# Build and deploy
sam build
sam deploy --guided --stack-name afterhours-shift-manager --region us-east-1

# Seed initial schedule data
python scripts/seed_schedule.py
```

### SSM Parameters

| Parameter | Description |
|---|---|
| `/afterhours-shift-manager/slack-bot-token` | Slack bot OAuth token (`xoxb-...`) |
| `/afterhours-shift-manager/slack-signing-secret` | Slack app signing secret |
| `/afterhours-shift-manager/channel-id` | Slack channel ID for notifications |

## Weekly Auto-Post

Every Monday at 7am ET, the bot posts the week's schedule to the configured channel with pickup buttons for any available shifts.

## Related

- [3cx-ring-scheduler](https://github.com/Sea-Haven-Industries/3cx-ring-scheduler) — the Lambda that updates 3CX ring group routing daily