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use std::sync::Arc;
use anyhow::Result;
use imap_codec::imap_types::command::{Command, CommandBody};
use imap_codec::imap_types::core::Charset;
use imap_codec::imap_types::fetch::MacroOrMessageDataItemNames;
use imap_codec::imap_types::search::SearchKey;
use imap_codec::imap_types::sequence::SequenceSet;
use crate::imap::capability::{ClientCapability, ServerCapability};
use crate::imap::command::{anystate, authenticated};
use crate::imap::flow;
use crate::imap::mailbox_view::MailboxView;
use crate::imap::response::Response;
use crate::mail::user::User;
pub struct ExaminedContext<'a> {
pub req: &'a Command<'static>,
pub user: &'a Arc<User>,
pub mailbox: &'a mut MailboxView,
pub server_capabilities: &'a ServerCapability,
pub client_capabilities: &'a mut ClientCapability,
}
pub async fn dispatch(ctx: ExaminedContext<'_>) -> Result<(Response<'static>, flow::Transition)> {
match &ctx.req.body {
// Any State
// noop is specific to this state
CommandBody::Capability => {
anystate::capability(ctx.req.tag.clone(), ctx.server_capabilities)
}
CommandBody::Logout => anystate::logout(),
// Specific to the EXAMINE state (specialization of the SELECTED state)
// ~3 commands -> close, fetch, search + NOOP
CommandBody::Close => ctx.close("CLOSE").await,
CommandBody::Fetch {
sequence_set,
macro_or_item_names,
uid,
} => ctx.fetch(sequence_set, macro_or_item_names, uid).await,
CommandBody::Search {
charset,
criteria,
uid,
} => ctx.search(charset, criteria, uid).await,
CommandBody::Noop | CommandBody::Check => ctx.noop().await,
CommandBody::Expunge { .. } | CommandBody::Store { .. } => Ok((
Response::build()
.to_req(ctx.req)
.message("Forbidden command: can't write in read-only mode (EXAMINE)")
.no()?,
flow::Transition::None,
)),
// UNSELECT extension (rfc3691)
CommandBody::Unselect => ctx.close("UNSELECT").await,
// In examined mode, we fallback to authenticated when needed
_ => {
authenticated::dispatch(authenticated::AuthenticatedContext {
req: ctx.req,
server_capabilities: ctx.server_capabilities,
client_capabilities: ctx.client_capabilities,
user: ctx.user,
})
.await
}
}
}
// --- PRIVATE ---
impl<'a> ExaminedContext<'a> {
/// CLOSE in examined state is not the same as in selected state
/// (in selected state it also does an EXPUNGE, here it doesn't)
async fn close(self, kind: &str) -> Result<(Response<'static>, flow::Transition)> {
Ok((
Response::build()
.to_req(self.req)
.message(format!("{} completed", kind))
.ok()?,
flow::Transition::Unselect,
))
}
pub async fn fetch(
self,
sequence_set: &SequenceSet,
attributes: &'a MacroOrMessageDataItemNames<'static>,
uid: &bool,
) -> Result<(Response<'static>, flow::Transition)> {
match self.mailbox.fetch(sequence_set, attributes, uid).await {
Ok(resp) => Ok((
Response::build()
.to_req(self.req)
.message("FETCH completed")
.set_body(resp)
.ok()?,
flow::Transition::None,
)),
Err(e) => Ok((
Response::build()
.to_req(self.req)
.message(e.to_string())
.no()?,
flow::Transition::None,
)),
}
}
pub async fn search(
self,
_charset: &Option<Charset<'a>>,
_criteria: &SearchKey<'a>,
_uid: &bool,
) -> Result<(Response<'static>, flow::Transition)> {
Ok((
Response::build()
.to_req(self.req)
.message("Not implemented")
.bad()?,
flow::Transition::None,
))
}
pub async fn noop(self) -> Result<(Response<'static>, flow::Transition)> {
self.mailbox.0.mailbox.force_sync().await?;
let updates = self.mailbox.update().await?;
Ok((
Response::build()
.to_req(self.req)
.message("NOOP completed.")
.set_body(updates)
.ok()?,
flow::Transition::None,
))
}
}
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