# Tasks for IRC

### Useful info

You can try connect IRC server with 

```bash
nc localhost <port>
```
---

### User

Represents a connected IRC client.

| Attribute       | Type     | Description                                    |
|-----------------|----------|------------------------------------------------|
| `fd`            | `int`    | TCP s-ocket file descriptor                    |
| `nick`          | `string` | IRC nickname                                   |
| `username`      | `string` | Username                                       |
| `realname`      | `string` | Real name                                      |
| `buffer`        | `string` | Incoming data buffer, accumulates until `\r\n` |
| `authenticated` | `bool`   | `true` after correct `PASS`                    |
| `registered`    | `bool`   | `true` after `NICK` + `USER` received          |

**Registration flow:** `PASS` → authenticated → `NICK` + `USER` → registered → client ready

---

### First stage

- [✓] Server starts
- [✓] It accepts two params, ./ircserv <port> <password>
- [✓] The server accepts one user, user can send messages and we can see from server
- [✓] Only 1 poll()

### Second stage

- [✓] Server can handle multiple clients simultaneously
- [✓] Manage SO_REUSEADDR (restarting server fails to bind same port)

### Third stage

- [✓] Dispatcher (select function for each command)
- [ ] Implement generic parser (extract command and pass args to command function)
- [ ] Client has nickname and username
- [ ] PASS command for authenticate

### Fourth stage

-  [ ] Client can create/connect to channels
- [ ] JOIN command (user can create channel)
- [ ] PRIVMSG command (send message to a channel)

*It will continue...*