afterhours-shift-manager/README.md

# 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 pay` | Show last week's bonus pay summary |
| `/oncall rate` | Show current shift pay rates |
| `/oncall rate default <amount>` | Set the default per-shift rate |
| `/oncall rate <ext> <amount>` | Set a per-person shift rate |
| `/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`) |
| `PAY` | `<YYYY-MM-DD>` | Weekly pay record (Monday date key) |
| `CONFIG` | `CONFIG` | Settings: shift_rate, fallback_extension |

## Deployment

Merges to `main` are automatically deployed via **CodePipeline + CodeBuild**. The pipeline stack (`afterhours-shift-manager-pipeline`) watches the GitHub repo and runs `sam build && sam package` then deploys via CloudFormation changeset.

For manual deploys:

```bash
sam build
sam deploy
```

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

### Version Bumps

A GitHub Actions workflow runs daily at 6pm ET, collects all PRs merged since the last version tag, creates a semver patch bump (e.g. v1.6.0 → v1.6.1), updates the Slack changelog canvas, and posts a summary to the team channel. Minor bumps can be triggered manually via `workflow_dispatch`.

### 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.

## Pay Report Email

A weekly Bonus Pay Summary email is sent via SES to payroll@seahaven.com with a table showing each employee's name, rate, and total pay for the week.

### Lambda Functions

| Function | Trigger | Purpose |
|---|---|---|
| `afterhours-shift-manager` | API Gateway (POST /slack/events) | Slack bot — handles `/oncall` commands and interactive buttons |
| `afterhours-weekly-post` | EventBridge (Monday 7am ET) | Posts weekly schedule to Slack, sends pay report email |
| `afterhours-roster-sync` | EventBridge (daily 6am ET) | Syncs employee roster from 3CX |

## Related

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