# DarkIRC Specification

## PrivMsgEvent

This is the main message type inside `darkirc`. The `PrivMsgEvent` is an
[event action](https://darkrenaissance.github.io/darkfi/misc/event_graph/network_protocol.html#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,
	}
```