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use std::io::Write;
use std::path::PathBuf;
use std::sync::Arc;
use anyhow::Result;
use futures::try_join;
use log::*;
use tokio::sync::watch;
use crate::config::*;
use crate::imap;
use crate::lmtp::*;
use crate::login::ArcLoginProvider;
use crate::login::{demo_provider::*, ldap_provider::*, static_provider::*};
pub struct Server {
lmtp_server: Option<Arc<LmtpServer>>,
imap_server: Option<imap::Server>,
pid_file: Option<PathBuf>,
}
impl Server {
pub async fn from_companion_config(config: CompanionConfig) -> Result<Self> {
tracing::info!("Init as companion");
let login = Arc::new(StaticLoginProvider::new(config.users).await?);
let lmtp_server = None;
let imap_server = Some(imap::new(config.imap, login.clone()));
Ok(Self {
lmtp_server,
imap_server,
pid_file: config.pid,
})
}
pub async fn from_provider_config(config: ProviderConfig) -> Result<Self> {
tracing::info!("Init as provider");
let login: ArcLoginProvider = match config.users {
UserManagement::Demo => Arc::new(DemoLoginProvider::new()),
UserManagement::Static(x) => Arc::new(StaticLoginProvider::new(x).await?),
UserManagement::Ldap(x) => Arc::new(LdapLoginProvider::new(x)?),
};
let lmtp_server = Some(LmtpServer::new(config.lmtp, login.clone()));
let imap_server = Some(imap::new(config.imap, login.clone()));
Ok(Self {
lmtp_server,
imap_server,
pid_file: config.pid,
})
}
pub async fn run(self) -> Result<()> {
let pid = std::process::id();
tracing::info!(pid = pid, "Starting main loops");
// write the pid file
if let Some(pid_file) = self.pid_file {
let mut file = std::fs::OpenOptions::new()
.write(true)
.create(true)
.truncate(true)
.open(pid_file)?;
file.write_all(pid.to_string().as_bytes())?;
drop(file);
}
let (exit_signal, provoke_exit) = watch_ctrl_c();
let _exit_on_err = move |err: anyhow::Error| {
error!("Error: {}", err);
let _ = provoke_exit.send(true);
};
try_join!(
async {
match self.lmtp_server.as_ref() {
None => Ok(()),
Some(s) => s.run(exit_signal.clone()).await,
}
},
async {
match self.imap_server {
None => Ok(()),
Some(s) => s.run(exit_signal.clone()).await,
}
}
)?;
Ok(())
}
}
pub fn watch_ctrl_c() -> (watch::Receiver<bool>, Arc<watch::Sender<bool>>) {
let (send_cancel, watch_cancel) = watch::channel(false);
let send_cancel = Arc::new(send_cancel);
let send_cancel_2 = send_cancel.clone();
tokio::spawn(async move {
tokio::signal::ctrl_c()
.await
.expect("failed to install CTRL+C signal handler");
info!("Received CTRL+C, shutting down.");
send_cancel.send(true).unwrap();
});
(watch_cancel, send_cancel_2)
}
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