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use anyhow::{Error, Result};
use boitalettres::proto::{res::body::Data as Body, Response};
use imap_codec::types::command::CommandBody;
use imap_codec::types::core::{AString, Atom};
use imap_codec::types::response::{Capability, Code, Data, Response as ImapRes, Status};
use crate::imap::flow;
use crate::imap::session::InnerContext;
//--- dispatching
pub async fn dispatch<'a>(ctx: InnerContext<'a>) -> Result<(Response, flow::Transition)> {
match &ctx.req.command.body {
CommandBody::Noop => Ok((Response::ok("Noop completed.")?, flow::Transition::No)),
CommandBody::Capability => capability(ctx).await,
CommandBody::Logout => logout(ctx).await,
CommandBody::Login { username, password } => login(ctx, username, password).await,
_ => Ok((
Response::no("This command is not available in the ANONYMOUS state.")?,
flow::Transition::No,
)),
}
}
//--- Command controllers, private
async fn capability<'a>(ctx: InnerContext<'a>) -> Result<(Response, flow::Transition)> {
let capabilities = vec![Capability::Imap4Rev1, Capability::Idle];
let res = Response::ok("Server capabilities")?.with_body(Data::Capability(capabilities));
Ok((res, flow::Transition::No))
}
async fn login<'a>(
ctx: InnerContext<'a>,
username: &AString,
password: &AString,
) -> Result<(Response, flow::Transition)> {
let (u, p) = (
String::try_from(username.clone())?,
String::try_from(password.clone())?,
);
tracing::info!(user = %u, "command.login");
let creds = match ctx.login.login(&u, &p).await {
Err(e) => {
tracing::debug!(error=%e, "authentication failed");
return Ok((Response::no("Authentication failed")?, flow::Transition::No));
}
Ok(c) => c,
};
let user = flow::User {
creds,
name: u.clone(),
};
tracing::info!(username=%u, "connected");
Ok((
Response::ok("Completed")?,
flow::Transition::Authenticate(user),
))
}
// C: 10 logout
// S: * BYE Logging out
// S: 10 OK Logout completed.
async fn logout<'a>(ctx: InnerContext<'a>) -> Result<(Response, flow::Transition)> {
// @FIXME we should implement From<Vec<Status>> and From<Vec<ImapStatus>> in
// boitalettres/src/proto/res/body.rs
Ok((
Response::ok("Logout completed")?.with_body(vec![Body::Status(
Status::bye(None, "Logging out")
.map_err(|e| Error::msg(e).context("Unable to generate IMAP status"))?,
)]),
flow::Transition::Logout,
))
}
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