src/config.rs

@@ -1,3 +1,4 @@
+use std::collections::HashMap;
 use std::env;
 use std::path::Path;
 
@@ -8,9 +9,9 @@ use toml_env::{initialize, Args, AutoMapEnvArgs, Logging};
 
 #[derive(Debug, Deserialize, Serialize)]
 pub struct BridgeConfig {
-    pub irc: IrcConfig,
+    pub irc: HashMap<String, IrcConfig>,
     pub signal: SignalConfig,
-    pub mapping: BiMap<String, String>,
+    pub mapping: BiMap<String, IrcTarget>,
 }
 
 impl BridgeConfig {
@@ -30,6 +31,12 @@ impl BridgeConfig {
     }
 }
 
+#[derive(Debug, Hash, PartialEq, Eq, Deserialize, Serialize)]
+pub struct IrcTarget {
+    pub server: String,  // TODO: Add a more meaningful type to enforce url format
+    pub channel: String, // Same (leading # ?)
+}
+
 #[derive(Debug, Deserialize, Serialize)]
 pub struct SignalConfig {
     pub media_dir: Box<Path>,

src/main.rs

@@ -3,7 +3,9 @@ mod transform;
 mod transports;
 mod config;
 
+use futures::future::join_all;
 use futures::future::try_join;
+use futures::future::try_join_all;
 use futures::prelude::*;
 use irc::client::prelude::*;
 use irc::client::ClientStream;
@@ -11,11 +13,34 @@ use jsonrpsee::core::client::{Subscription, SubscriptionClientT};
 use serde_json::Value;
 use tokio::time::sleep;
 use core::time::Duration;
+use std::collections::HashMap;
 use transform::Bridge;
 
 use crate::jsonrpc::RpcClient;
 use crate::config::BridgeConfig;
 
+async fn init_irc_client(mut client: Client) -> Result<(irc::client::Sender, ClientStream), String> {
+    client
+        .identify()
+        .map_err(|e| format!("Error while initializing irc client: {e}"))?;
+
+    let sender = client.sender();
+    let mut stream = client
+        .stream()
+        .map_err(|e| format!("Error while initializing irc stream: {e}"))?;
+
+    log::debug!("Initializing IRC");
+    while client.list_channels().is_some_and(|x| x.is_empty()) {
+        stream
+            .next()
+            .await
+            .transpose()
+            .map_err(|e| format!("error waiting for motd: {e}"))?;
+    }
+    log::debug!("Initialized IRC");
+    Ok::<(irc::client::Sender, ClientStream), String>((sender, stream))
+}
+
 #[tokio::main]
 async fn main() -> Result<(), String> {
     pretty_env_logger::init();
@@ -24,30 +49,45 @@ async fn main() -> Result<(), String> {
 
     // Initialisation of components. TODO separate module
     let init_irc = async {
-        let mut client = Client::from_config(config.irc.clone()).await.unwrap();
+        let senders_and_streams: HashMap<String, Result<(irc::client::Sender, ClientStream), String>> = join_all(
-        client
+            config.irc.into_iter()
-            .identify()
+            .map(|(name, config)| async {
-            .map_err(|e| format!("Error while initializing irc client: {e}"))?;
+                let irc_client = init_irc_client(Client::from_config(config)
+                                       .await
+                                       .expect(&format!("Failed to parse configuration for {name}"))).await;
+                (name, irc_client)
+            })
+            // Filter out failed connections
+            //.collect()
+        ).await.into_iter().collect();
 
-        let sender = client.sender();
+        let filtered_senders_and_streams: Vec<(String, irc::client::Sender, ClientStream)> = senders_and_streams
-        let mut stream = client
+            .into_iter()
-            .stream()
+            .filter_map(|(name, result)| {
-            .map_err(|e| format!("Error while initializing irc stream: {e}"))?;
+                match result {
+                    Ok((sender, stream)) => Some((name, sender, stream)),
+                    Err(reason) => {
+                        log::warn!("Failed to initialize server {name}: {reason}, disabling this server.");
+                        None
+                    }
+                }
+            })
+        .collect();
 
-        log::debug!("Initializing IRC");
+        let mut filtered_senders = HashMap::new();
-        while client.list_channels().is_some_and(|x| x.is_empty()) {
+        let mut filtered_streams = HashMap::new();
-            stream
+
-                .next()
+        for (name, sender, stream) in filtered_senders_and_streams {
-                .await
+            filtered_senders.insert(name.clone(), sender);
-                .transpose()
+            filtered_streams.insert(name, stream);
-                .map_err(|e| format!("error waiting for motd: {e}"))?;
         }
-        log::debug!("Initialized IRC");
+
-        Ok::<(irc::client::Sender, ClientStream), String>((sender, stream))
+        (filtered_senders, filtered_streams)
     };
     let init_signal = async {
         log::debug!("Initializing Signal");
         let signal_client = (async {
+            // TODO(raito): use exponential backoff here!
             for i in 0..10 {
                 match jsonrpc::connect_unix(&config.signal.socket).await {
                 Ok(client) => {
@@ -66,10 +106,12 @@ async fn main() -> Result<(), String> {
             .await
             .map_err(|e| format!("failed to subscribe to signal msg: {e}"))?;
         log::debug!("Initialized Signal");
-        Ok((signal_stream, signal_client))
+        Ok::<_, String>((signal_stream, signal_client))
     };
-    let ((sender, mut stream), (mut signal_stream, signal_client)) =
+
-        try_join(init_irc, init_signal).await?;
+    let (mut signal_stream, signal_client) = init_signal.await?;
+    let (irc_senders, irc_streams) = init_irc.await;
+
     let bridge = Bridge::new(
         &config.signal.media_dir,
         &config.signal.signal_cli_dir,
@@ -78,17 +120,25 @@ async fn main() -> Result<(), String> {
     );
 
     // Run !!
-    log::info!("Bridge is up and running");
+    log::info!("Bridge is ready to run");
+
+    // TODO: if only one of the future fails, we should not crash the rest of the threads but log a
+    // very good error.
+    let irc_handlers = try_join_all(irc_streams.into_iter().map(|(name, mut stream)| {
+        log::info!("Listening for IRC messages for {name}");
+        handle_irc(name, &mut stream, signal_client, &bridge)
+    }));
 
     try_join(
-        handle_signal(sender, &mut signal_stream, &bridge),
+        handle_signal(irc_senders, &mut signal_stream, &bridge),
-        handle_irc(&mut stream, signal_client, &bridge),
+        irc_handlers
     )
     .await?;
     unreachable!();
 }
 
 async fn handle_irc(
+    server_id: String,
     stream: &mut ClientStream,
     signal_client: impl SubscriptionClientT + std::marker::Sync,
     bridge: &Bridge<'_>,
@@ -100,7 +150,7 @@ async fn handle_irc(
             .transpose()
             .map_err(|e| format!("error while retrieving messages from irc: {e}"))?
         {
-            if let Some((groupid, msg)) = bridge.irc2signal(message) {
+            if let Some((groupid, msg)) = bridge.irc2signal(&server_id, message) {
                 log::trace!("[SIGNAL SEND] {msg}");
                 signal_client
                     .send(
@@ -136,7 +186,7 @@ async fn handle_irc(
 }
 
 async fn handle_signal(
-    sender: Sender,
+    senders: HashMap<String, Sender>,
     stream: &mut Subscription<Value>,
     bridge: &Bridge<'_>,
 ) -> Result<(), String> {
@@ -147,8 +197,15 @@ async fn handle_signal(
             }
             Some(Ok(val)) => {
                 log::trace!("[SIGNAL RCV] {:?}", val);
-                if let Some((channel, msg)) = bridge.signal2irc(val).await {
+                if let Some((server, channel, msg)) = bridge.signal2irc(val).await {
-                    sender
+                    if !senders.contains_key(server) {
+                        log::error!("Tried to send message to server {server} but is unavailable!");
+                        return Err(
+                            format!("unavailable IRC server '{server}' when receiving a Signal message for it")
+                        );
+                    }
+
+                    senders[server]
                         .send_privmsg(channel, msg)
                         .map_err(|e| format!("error while sending to irc: {e}"))?;
                 }

src/transform.rs

@@ -1,6 +1,8 @@
 use std::path::Path;
 use bimap::BiMap;
 
+use crate::config::IrcTarget;
+
 use irc::client::prelude::*;
 use serde_json::{Map, Value};
 use tokio::fs::copy;
@@ -11,7 +13,8 @@ struct SignalMessageBuilder<'a> {
     message: Option<String>,
     attachments_urls: Vec<String>,
     mentions: Vec<(usize, usize, String)>, // TODO Add type
-    target: Option<&'a String>,
+    target_channel: Option<&'a str>,
+    target_server: Option<&'a str>,
 }
 
 impl<'b> SignalMessageBuilder<'b> {
@@ -31,13 +34,32 @@ impl<'b> SignalMessageBuilder<'b> {
         self.mentions.extend_from_slice(mentions);
     }
 
-    pub fn target(&mut self, channel: Option<&'b String>) {
+    pub fn target(&mut self, target: Option<&'b IrcTarget>) {
-        self.target = channel;
+        match target {
+            Some(target) => {
+        self.channel(Some(&target.channel));
+        self.server(Some(&target.server));
+            },
+            None => {
+        self.channel(None);
+        self.server(None);
+        },
+        };
     }
 
-    pub fn build(mut self) -> Option<(&'b String, String)>
+    pub fn channel(&mut self, channel: Option<&'b str>) {
+        self.target_channel = channel;
+    }
+
+
+    pub fn server(&mut self, server: Option<&'b str>) {
+        self.target_server = server;
+    }
+
+    pub fn build(mut self) -> Option<(&'b str, &'b str, String)>
     {
         self.mentions.sort_by(|(pos1, _, _), (pos2, _, _)| pos1.cmp(pos2));
+        log::trace!("building the final message: {:?} {:?}", self.mentions, self.message);
         self.message.as_mut().map(|message| {
             let mut offset: usize = 0;
             for (pos, len, name) in self.mentions.into_iter() {
@@ -46,7 +68,7 @@ impl<'b> SignalMessageBuilder<'b> {
             }
         });
         let attachments_text = self.attachments_urls.join(", ");
-        (match (&self.message, attachments_text.len()) {
+        let message = (match (&self.message, attachments_text.len()) {
             (None, 0) => None,
             (None, _) => self
                 .from
@@ -57,7 +79,11 @@ impl<'b> SignalMessageBuilder<'b> {
                 .from
                 .as_ref()
                 .map(|from| format!("<{from}>: {m} ({attachments_text})")),
-        }).and_then(|m| self.target.map(|e| (e, m)))
+        })?;
+        let target_channel = self.target_channel?;
+        let target_server = self.target_server?;
+
+        Some((target_server, target_channel, message))
     }
 }
 
@@ -65,7 +91,7 @@ pub struct Bridge<'a> {
     media_dir: &'a Path,
     signalcli_dir: &'a Path,
     url_root: &'a str,
-    mapping: &'a BiMap<String, String>,
+    mapping: &'a BiMap<String, IrcTarget>,
 }
 
 impl<'a> Bridge<'a> {
@@ -73,7 +99,7 @@ impl<'a> Bridge<'a> {
         media_dir: &'a Path,
         signalcli_dir: &'a Path,
         url_root: &'a str,
-        mapping: &'a BiMap<String, String>,
+        mapping: &'a BiMap<String, IrcTarget>,
     ) -> Self {
         Self {
             media_dir,
@@ -117,7 +143,7 @@ impl<'a> Bridge<'a> {
                 if let Some(url) = self.handle_attachment(a).await {
                     attachments_urls.push(url);
                 } else {
-                    log::warn!("droped attachment: {a}");
+                    log::warn!("dropped attachment: {a}");
                 }
             }
             result.attach(&attachments_urls);
@@ -127,12 +153,12 @@ impl<'a> Bridge<'a> {
         }
         if let Some(Value::Object(group_info)) = message.get("groupInfo") {
             if let Some(Value::String(groupid)) = group_info.get("groupId") {
-                result.target(self.mapping.get_by_right(groupid));
+                result.target(self.mapping.get_by_left(groupid));
             }
         }
     }
 
-    pub async fn signal2irc(&self, signal: Value) -> Option<(&String, String)> {
+    pub async fn signal2irc(&self, signal: Value) -> Option<(&str, &str, String)> {
         let mut result: SignalMessageBuilder = SignalMessageBuilder::default();
         if let Value::Object(map) = signal {
             if let Some(Value::Object(envelope)) = map.get("envelope") {
@@ -152,7 +178,7 @@ impl<'a> Bridge<'a> {
         result.build()
     }
 
-    pub fn irc2signal(&self, message: Message) -> Option<(&String, String)> {
+    pub fn irc2signal(&self, server: &String, message: Message) -> Option<(&String, String)> {
         match (message.prefix, message.command) {
             (Some(Prefix::Nickname(from, _, _)), Command::PRIVMSG(channel, message)) => {
                 Some((channel, format!("<{from}>: {message}")))
@@ -162,6 +188,6 @@ impl<'a> Bridge<'a> {
             }
             _ => None,
         }
-        .and_then(|(channel, e)| self.mapping.get_by_left(&channel).map(|c| (c, e)))
+        .and_then(|(channel, e)| self.mapping.get_by_right(&IrcTarget { server: *server, channel}).map(|c| (c, e)))
     }
 }