448 lines
12 KiB
Rust
448 lines
12 KiB
Rust
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pub mod events;
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pub mod factory;
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pub mod irc_command;
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pub mod system;
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pub mod system_params;
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use std::{
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any::TypeId,
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collections::{HashMap, VecDeque},
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io::ErrorKind,
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net::ToSocketAddrs,
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path::Path,
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time::SystemTime,
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};
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use async_native_tls::TlsStream;
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use factory::Factory;
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use irc_command::IrcCommand;
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use serde::{Deserialize, Serialize};
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use system::{IntoSystem, StoredSystem, System};
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use tokio::{
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fs::File,
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io::{AsyncReadExt, AsyncWriteExt},
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net::TcpStream,
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};
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pub(crate) const MAX_MSG_LEN: usize = 512;
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#[derive(Default)]
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pub enum Stream {
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Plain(TcpStream),
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Tls(TlsStream<TcpStream>),
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#[default]
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None,
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}
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impl Stream {
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pub async fn read(&mut self, buf: &mut [u8]) -> std::result::Result<usize, std::io::Error> {
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match self {
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Stream::Plain(stream) => stream.read(buf).await,
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Stream::Tls(stream) => stream.read(buf).await,
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Stream::None => panic!("No stream."),
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}
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}
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pub async fn write(&mut self, buf: &[u8]) -> std::result::Result<usize, std::io::Error> {
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match self {
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Stream::Plain(stream) => stream.write(buf).await,
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Stream::Tls(stream) => stream.write(buf).await,
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Stream::None => panic!("No stream."),
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}
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}
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}
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pub struct FloodControl {
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last_cmd: SystemTime,
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}
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impl Default for FloodControl {
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fn default() -> Self {
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Self {
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last_cmd: SystemTime::now(),
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}
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}
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}
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#[derive(Clone, Debug, Default)]
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pub struct IrcPrefix<'a> {
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pub admin: bool,
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pub nick: &'a str,
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pub user: Option<&'a str>,
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pub host: Option<&'a str>,
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}
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impl<'a> From<&'a str> for IrcPrefix<'a> {
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fn from(prefix_str: &'a str) -> Self {
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let prefix_str = &prefix_str[1..];
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let nick_split: Vec<&str> = prefix_str.split('!').collect();
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let nick = nick_split[0];
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// we only have a nick
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if nick_split.len() == 1 {
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return Self {
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nick,
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..Default::default()
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};
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}
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let user_split: Vec<&str> = nick_split[1].split('@').collect();
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let user = user_split[0];
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// we don't have an host
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if user_split.len() == 1 {
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return Self {
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nick: nick,
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user: Some(user),
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..Default::default()
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};
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}
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Self {
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admin: false,
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nick: nick,
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user: Some(user),
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host: Some(user_split[1]),
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}
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}
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}
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pub struct IrcMessage<'a> {
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prefix: Option<IrcPrefix<'a>>,
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command: IrcCommand,
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parameters: Vec<&'a str>,
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}
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impl<'a> From<&'a str> for IrcMessage<'a> {
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fn from(line: &'a str) -> Self {
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let mut elements = line.split_whitespace();
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let tmp = elements.next().unwrap();
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if tmp.chars().next().unwrap() == ':' {
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return Self {
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prefix: Some(tmp.into()),
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command: elements.next().unwrap().into(),
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parameters: elements.collect(),
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};
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}
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Self {
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prefix: None,
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command: tmp.into(),
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parameters: elements.collect(),
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}
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}
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}
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#[derive(Serialize, Deserialize)]
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pub struct IrcConfig {
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host: String,
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port: u16,
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ssl: bool,
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channels: Vec<String>,
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nick: String,
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user: String,
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real: String,
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nickserv_pass: String,
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nickserv_email: String,
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cmdkey: String,
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flood_interval: f32,
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owner: String,
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admins: Vec<String>,
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}
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pub struct Irc {
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config: IrcConfig,
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stream: Stream,
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systems: HashMap<String, StoredSystem>,
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factory: Factory,
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flood_controls: HashMap<String, FloodControl>,
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send_queue: VecDeque<String>,
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recv_queue: VecDeque<String>,
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partial_line: String,
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}
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impl Irc {
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pub async fn from_config(path: impl AsRef<Path>) -> std::io::Result<Self> {
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let mut file = File::open(path).await?;
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let mut contents = String::new();
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file.read_to_string(&mut contents).await?;
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let config: IrcConfig = serde_yaml::from_str(&contents).unwrap();
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Ok(Self {
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config,
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stream: Stream::None,
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systems: HashMap::default(),
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factory: Factory::default(),
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flood_controls: HashMap::default(),
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send_queue: VecDeque::new(),
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recv_queue: VecDeque::new(),
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partial_line: String::new(),
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})
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}
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pub fn add_system<I, S: for<'a> System<'a> + 'static>(
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&mut self,
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name: &str,
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system: impl for<'a> IntoSystem<'a, I, System = S>,
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) -> &mut Self {
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self.systems
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.insert(name.to_owned(), Box::new(system.into_system()));
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self
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}
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pub fn add_resource<R: 'static>(&mut self, res: R) -> &mut Self {
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self.factory
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.resources
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.insert(TypeId::of::<R>(), Box::new(res));
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self
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}
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pub fn run_system<'a>(&mut self, prefix: &'a IrcPrefix, name: &str) {
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let system = self.systems.get_mut(name).unwrap();
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system.run(prefix, &mut self.factory);
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}
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pub async fn connect(&mut self) -> std::io::Result<()> {
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let domain = format!("{}:{}", self.config.host, self.config.port);
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let mut addrs = domain
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.to_socket_addrs()
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.expect("Unable to get addrs from domain {domain}");
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let sock = addrs
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.next()
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.expect("Unable to get ip from addrs: {addrs:?}");
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let plain_stream = TcpStream::connect(sock).await?;
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if self.config.ssl {
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let stream = async_native_tls::connect(self.config.host.clone(), plain_stream)
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.await
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.unwrap();
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self.stream = Stream::Tls(stream);
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return Ok(());
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}
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self.stream = Stream::Plain(plain_stream);
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Ok(())
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}
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pub fn register(&mut self) {
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self.queue(&format!(
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"USER {} 0 * {}",
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self.config.user, self.config.real
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));
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self.queue(&format!("NICK {}", self.config.nick));
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}
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async fn recv(&mut self) -> std::io::Result<()> {
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let mut buf = [0; MAX_MSG_LEN];
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let bytes_read = match self.stream.read(&mut buf).await {
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Ok(bytes_read) => bytes_read,
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Err(err) => match err.kind() {
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ErrorKind::WouldBlock => {
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return Ok(());
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}
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_ => panic!("{err}"),
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},
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};
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if bytes_read == 0 {
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return Ok(());
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}
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let buf = &buf[..bytes_read];
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self.partial_line += String::from_utf8_lossy(buf).into_owned().as_str();
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let new_lines: Vec<&str> = self.partial_line.split("\r\n").collect();
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let len = new_lines.len();
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for (index, line) in new_lines.into_iter().enumerate() {
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if index == len - 1 && &buf[buf.len() - 3..] != b"\r\n" {
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self.partial_line = line.to_owned();
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break;
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}
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self.recv_queue.push_back(line.to_owned());
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}
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Ok(())
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}
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async fn send(&mut self) -> std::io::Result<()> {
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while self.send_queue.len() > 0 {
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let msg = self.send_queue.pop_front().unwrap();
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let bytes_written = match self.stream.write(msg.as_bytes()).await {
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Ok(bytes_written) => bytes_written,
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Err(err) => match err.kind() {
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ErrorKind::WouldBlock => {
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return Ok(());
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}
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_ => panic!("{err}"),
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},
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};
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if bytes_written < msg.len() {
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self.send_queue.push_front(msg[bytes_written..].to_owned());
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}
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}
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Ok(())
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}
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fn queue(&mut self, msg: &str) {
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let mut msg = msg.replace("\r", "").replace("\n", "");
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if msg.len() > MAX_MSG_LEN - "\r\n".len() {
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let mut i = 0;
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while i < msg.len() {
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let max = (MAX_MSG_LEN - "\r\n".len()).min(msg[i..].len());
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let mut m = msg[i..(i + max)].to_owned();
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println!(">> {:?}", m);
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m = m + "\r\n";
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self.send_queue.push_back(m);
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i += MAX_MSG_LEN - "\r\n".len()
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}
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} else {
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println!(">> {:?}", msg);
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msg = msg + "\r\n";
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self.send_queue.push_back(msg);
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}
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}
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pub async fn update(&mut self) -> std::io::Result<()> {
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self.recv().await?;
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self.send().await?;
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self.handle_commands().await;
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Ok(())
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}
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pub async fn handle_commands(&mut self) {
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while self.recv_queue.len() != 0 {
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let owned_line = self.recv_queue.pop_front().unwrap();
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let line = owned_line.as_str();
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println!("<< {:?}", line);
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let mut message: IrcMessage = line.into();
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let Some(prefix) = &mut message.prefix else {
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return self.handle_message(&message).await;
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};
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if self.is_owner(prefix) {
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prefix.admin = true;
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} else {
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for admin in &self.config.admins {
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if self.is_admin(prefix, admin) {
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prefix.admin = true;
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break;
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}
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}
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}
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self.handle_message(&message).await;
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}
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}
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fn is_owner(&self, prefix: &IrcPrefix) -> bool {
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self.is_admin(prefix, &self.config.owner)
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}
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fn is_admin(&self, prefix: &IrcPrefix, admin: &str) -> bool {
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let admin = ":".to_owned() + &admin;
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let admin_prefix: IrcPrefix = admin.as_str().into();
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if (admin_prefix.nick == prefix.nick || admin_prefix.nick == "*")
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&& (admin_prefix.user == prefix.user || admin_prefix.user == Some("*"))
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&& (admin_prefix.host == prefix.host || admin_prefix.host == Some("*"))
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{
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return true;
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}
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false
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}
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fn join(&mut self, channel: &str) {
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self.queue(&format!("JOIN {}", channel))
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}
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fn join_config_channels(&mut self) {
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for i in 0..self.config.channels.len() {
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let channel = &self.config.channels[i];
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self.queue(&format!("JOIN {}", channel))
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}
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}
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fn update_nick(&mut self, new_nick: &str) {
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self.config.nick = new_nick.to_owned();
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self.queue(&format!("NICK {}", self.config.nick));
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}
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fn is_flood(&mut self, channel: &str) -> bool {
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let mut flood_control = match self.flood_controls.entry(channel.to_owned()) {
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|
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std::collections::hash_map::Entry::Occupied(o) => o.into_mut(),
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|
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std::collections::hash_map::Entry::Vacant(v) => v.insert(FloodControl {
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|
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last_cmd: SystemTime::now(),
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}),
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};
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||
|
|
let elapsed = flood_control.last_cmd.elapsed().unwrap();
|
||
|
|
|
||
|
|
if elapsed.as_secs_f32() < self.config.flood_interval {
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
flood_control.last_cmd = SystemTime::now();
|
||
|
|
false
|
||
|
|
}
|
||
|
|
|
||
|
|
pub fn privmsg(&mut self, channel: &str, message: &str) {
|
||
|
|
self.queue(&format!("PRIVMSG {} :{}", channel, message));
|
||
|
|
}
|
||
|
|
|
||
|
|
pub fn privmsg_all(&mut self, message: &str) {
|
||
|
|
for i in 0..self.config.channels.len() {
|
||
|
|
let channel = &self.config.channels[i];
|
||
|
|
self.queue(&format!("PRIVMSG {} :{}", channel, message));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
async fn handle_message<'a>(&mut self, message: &'a IrcMessage<'a>) {
|
||
|
|
match message.command {
|
||
|
|
IrcCommand::PING => self.event_ping(&message.parameters[0]),
|
||
|
|
IrcCommand::RPL_WELCOME => self.event_welcome(),
|
||
|
|
IrcCommand::ERR_NICKNAMEINUSE => self.event_nicknameinuse(),
|
||
|
|
IrcCommand::KICK => self.event_kick(
|
||
|
|
message.parameters[0],
|
||
|
|
message.parameters[1],
|
||
|
|
&message.parameters[3..].join(" "),
|
||
|
|
),
|
||
|
|
IrcCommand::QUIT => self.event_quit(message.prefix.as_ref().unwrap()).await,
|
||
|
|
IrcCommand::INVITE => self.event_invite(
|
||
|
|
message.prefix.as_ref().unwrap(),
|
||
|
|
&message.parameters[0][1..],
|
||
|
|
),
|
||
|
|
IrcCommand::PRIVMSG => self.event_privmsg(
|
||
|
|
message.prefix.as_ref().unwrap(),
|
||
|
|
&message.parameters[0],
|
||
|
|
&message.parameters[1..].join(" ")[1..],
|
||
|
|
),
|
||
|
|
IrcCommand::NOTICE => self.event_notice(
|
||
|
|
message.prefix.as_ref(),
|
||
|
|
&message.parameters[0],
|
||
|
|
&message.parameters[1..].join(" ")[1..],
|
||
|
|
),
|
||
|
|
_ => {}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|