Implement INFO command

currently returns:
- copyright info
- author info
- website and irc channel
- version
- build date

sable_ircd/info.txt

@@ -0,0 +1,21 @@
+Sable --
+
+Copyright (c) 2021-2024 Sable Development Team
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU Affero General Public License as published
+by the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+Source code is available at: https://github.com/Libera-Chat/sable
+
+Development is led by:
+
+spb <[email protected]>
+val <[email protected]>
+
+A full list of contributors can be found in the git log.
+
+Visit the Sable website at: https://sable.chat/
+Visit us on IRC at irc.libera.chat #libera-dev
+

sable_ircd/src/command/handlers/info.rs

@@ -0,0 +1,22 @@
+use super::*;
+
+#[command_handler("INFO")]
+/// Syntax: INFO
+fn info_handler(
+    response: &dyn CommandResponse,
+    server: &ClientServer,
+) -> CommandResult {
+    let node = server.node();
+    let version = node.version();
+    let build_date = node.build_date();
+
+    for line in &server.info_strings.info {
+        response.numeric(make_numeric!(Info, line));
+    }
+    response.numeric(make_numeric!(Info, &format!("Version: {version}")));
+    response.numeric(make_numeric!(Info, &format!("Build date: {build_date}")));
+    // TODO: send configuration info to opers
+    // see: https://github.com/solanum-ircd/solanum/blob/main/modules/m_info.c#L788
+    response.numeric(make_numeric!(EndOfInfo));
+    Ok(())
+}

sable_ircd/src/command/mod.rs

@@ -42,6 +42,7 @@ mod handlers {
     mod ban;
     mod cap;
     mod chathistory;
+    mod info;
     mod invite;
     mod join;
     mod kick;

sable_ircd/src/messages/numeric.rs

@@ -67,6 +67,9 @@ define_messages! {
 
     381(YoureOper)              => { ()                         => "You are now an IRC operator" },
 
+    371(Info)                   => { (line: &str)               => ":{line}" },
+    374(EndOfInfo)              => { ()                         => ":End of /INFO list" },
+
 
     401(NoSuchTarget)           => { (unknown: &str)            => "{unknown} :No such nick/channel" },
     402(NoSuchServer)           => { (server_name: &ServerName) => "{server_name} :No such server" },

sable_ircd/src/server/config.rs

@@ -30,6 +30,7 @@ pub struct RawClientServerConfig {
 pub struct ServerInfoStrings {
     pub motd: Option<Vec<String>>, // Linewise to not repeatedly split
     pub admin_info: Option<AdminInfo>,
+    pub info: Vec<String>,
 }
 
 impl ServerInfoStrings {
@@ -38,6 +39,7 @@ impl ServerInfoStrings {
             motd: Self::get_info(&raw_info.motd, "motd")?
                 .map(|file| file.lines().map(|v| v.to_string()).collect()),
             admin_info: raw_info.admin.clone(),
+            info: include_str!("../../info.txt").lines().map(|v| v.to_string()).collect(),
         })
     }