# darkirc Specification

## PrivMsgEvent

This is the main message type inside `darkirc`. The `PrivMsgEvent` is an
[event action](../event_graph/network_protocol.md#event).


| Description   | Data Type  | Comments                                                   | 
|---------------|------------|------------------------------------------------------------|
| `nickname`    | `String`   | The nickname for the sender (must be less than 32 chars)   |
| `target`      | `String`   | The target for the message (recipient)                     |
| `message`     | `String`   | The actual content of the message                          |

## ChannelInfo

Preconfigured channel in the configuration file.

In the TOML configuration file, the channel is set as such:

```toml
[channel."#dev"]
secret = "GvH4kno3kUu6dqPrZ8zjMhqxTUDZ2ev16EdprZiZJgj1"
topic = "DarkFi Development Channel"
```

| Description  | Data Type     | Comments                                                      |
|--------------|---------------| --------------------------------------------------------------|
| `topic`      | `String`      | Optional topic for the channel                                |
| `secret`     | `String`      | Optional NaCl box for the channel, used for {en,de}cryption.  |
| `joined`     | `bool`        | Indicate whether the user has joined the channel              |
| `names`      | `Vec<String>` | All nicknames which are visible on the channel                |


## ContactInfo

Preconfigured contact in the configuration file.

In the TOML configuration file, the contact is set as such:

```toml
[contact."nick"]
contact_pubkey = "7CkVuFgwTUpJn5Sv67Q3fyEDpa28yrSeL5Hg2GqQ4jfM"
```

| Description   | Data Type     | Comments                                             |
|---------------|---------------| -----------------------------------------------------|
| `pubkey`      | `String`      | A Public key for the contact to encrypt the message  |

## IrcConfig

The base Irc configuration for each new `IrcClient`.

| Description     | Data Type                       | Comments                                                                        |
|-----------------|-------------------------------- | --------------------------------------------------------------------------------|
| `is_nick_init`  | `bool`                          | Confirmation of receiving /nick command                                         |
| `is_user_init`  | `bool`                          | Confirmation of receiving /user command                                         |
| `is_cap_end`    | `bool`                          | Indicate whether the irc client finished the Client Capability Negotiation      |
| `is_pass_init`  | `bool`                          | Confirmation of checking the password in the configuration file                 |
| `is_registered` | `bool`                          | Indicate the `IrcClient` is initialized and ready to sending/receiving messages |
| `nickname`      | `String`                        | The irc client nickname                                                         |
| `password`      | `String`                        | The password for the irc client. (it could be empty)                            |
| `private_key`   | `Option<String>`                | A private key to decrypt direct messages from contacts                          |
| `capabilities`  | `HashMap<String, bool>`         | A list of capabilities for the irc clients and the server to negotiate          |
| `auto_channels` | `Vec<String>`                   | Auto join channels for the irc clients                                          |
| `channels`      | `HashMap<String, ChannelInfo>`  | A list of preconfigured channels in the configuration file                      |
| `contacts`      | `HashMap<String, ContactInfo>`  | A list of preconfigured contacts in the configuration file for direct message   |

## IrcServer

The server start listening to an address specifed in the configuration file. 

For each irc client get connected, an `IrcClient` instance created.

| Description               | Data Type                     | Comments                                              |
|---------------------------|-------------------------------| ------------------------------------------------------|
| `settings`                | `Settings`                    | The base settings parsed from the configuration file  |
| `clients_subscriptions`   | `SubscriberPtr<ClientSubMsg>` | Channels to notify the `IrcClient`s about new data    |

##  IrcClient

The `IrcClient` handle all irc opeartions and commands from the irc client.

| Description       | Data Type                     | Comments                                                                  |
|-------------------|-------------------------------|---------------------------------------------------------------------------|
| `write_stream`    | `WriteHalf<Stream>`           | A writer for sending data to the connection stream                        |
| `read_stream`     | `ReadHalf<Stream>`            | Read data from the connection stream                                      |
| `address`         | `SocketAddr`                  | The actual address for the irc client connection                          |
| `irc_config`      | `IrcConfig`                   | Base configuration for irc                                                |
| `server_notifier` | `Channel<(NotifierMsg, u64)>` | A Channel to notify the server about a new data from the irc client       |
| `subscription`    | `Subscription<ClientSubMsg>`  | A channel to receive notification from the server                         |


## Communications between the server and the clients

Two Communication channels get initialized by the server for every new `IrcClient`. 

The channel `Channel<(NotifierMsg, u64)>` used  by the `IrcClient` to
notify the server about new messages/queries received from the irc client.

The channel `Subscription<ClientSubMsg>` used by the server to notify
`IrcClient`s about new messages/queries fetched from the `View`. 

### ClientSubMsg

```rust
	enum ClientSubMsg {
		Privmsg(`PrivMsgEvent`),
		Config(`IrcConfig`),	
	}
```

### NotifierMsg 

```rust
	enum NotifierMsg {
		Privmsg(`PrivMsgEvent`),
		UpdateConfig,
	}
```