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/*
* meli - imap
*
* Copyright 2020 Manos Pitsidianakis
*
* This file is part of meli.
*
* meli is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* meli is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with meli. If not, see <http://www.gnu.org/licenses/>.
*/
use super::{ImapConnection, MailboxSelection, UID};
use crate::backends::imap::protocol_parser::{
generate_envelope_hash, FetchResponse, ImapLineSplit, RequiredResponses, UntaggedResponse,
};
use crate::backends::BackendMailbox;
use crate::backends::{
RefreshEvent,
RefreshEventKind::{self, *},
};
use crate::email::Envelope;
use crate::error::*;
use std::convert::TryInto;
impl ImapConnection {
pub async fn process_untagged(&mut self, line: &[u8]) -> Result<bool> {
macro_rules! try_fail {
($mailbox_hash: expr, $($result:expr $(,)*)+) => {
$(if let Err(err) = $result {
self.uid_store.is_online.lock().unwrap().1 = Err(err.clone());
debug!("failure: {}", err.to_string());
self.add_refresh_event(RefreshEvent {
account_hash: self.uid_store.account_hash,
mailbox_hash: $mailbox_hash,
kind: RefreshEventKind::Failure(err.clone()),
});
Err(err)
} else { Ok(()) }?;)+
};
}
let mailbox_hash = match self.stream.as_ref()?.current_mailbox {
MailboxSelection::Select(h) | MailboxSelection::Examine(h) => h,
MailboxSelection::None => return Ok(false),
};
let mailbox =
std::clone::Clone::clone(&self.uid_store.mailboxes.lock().await[&mailbox_hash]);
#[cfg(not(feature = "sqlite3"))]
let mut cache_handle = super::cache::DefaultCache::get(self.uid_store.clone())?;
#[cfg(feature = "sqlite3")]
let mut cache_handle = super::cache::Sqlite3Cache::get(self.uid_store.clone())?;
let mut response = Vec::with_capacity(8 * 1024);
let untagged_response =
match super::protocol_parser::untagged_responses(line).map(|(_, v, _)| v) {
Ok(None) | Err(_) => {
return Ok(false);
}
Ok(Some(r)) => r,
};
match untagged_response {
UntaggedResponse::Bye { reason } => {
self.uid_store.is_online.lock().unwrap().1 = Err(reason.into());
}
UntaggedResponse::Expunge(n) => {
if self
.uid_store
.msn_index
.lock()
.unwrap()
.get(&mailbox_hash)
.map(|i| i.len() < n.try_into().unwrap())
.unwrap_or(true)
{
debug!(
"Received expunge {} but mailbox msn index is {:?}",
n,
self.uid_store.msn_index.lock().unwrap().get(&mailbox_hash)
);
return Ok(true);
}
let deleted_uid = self
.uid_store
.msn_index
.lock()
.unwrap()
.entry(mailbox_hash)
.or_default()
.remove(TryInto::<usize>::try_into(n).unwrap().saturating_sub(1));
debug!("expunge {}, UID = {}", n, deleted_uid);
let deleted_hash: crate::email::EnvelopeHash = match self
.uid_store
.uid_index
.lock()
.unwrap()
.remove(&(mailbox_hash, deleted_uid))
{
Some(v) => v,
None => return Ok(true),
};
self.uid_store
.hash_index
.lock()
.unwrap()
.remove(&deleted_hash);
let mut event: [(UID, RefreshEvent); 1] = [(
deleted_uid,
RefreshEvent {
account_hash: self.uid_store.account_hash,
mailbox_hash,
kind: Remove(deleted_hash),
},
)];
if self.uid_store.keep_offline_cache {
cache_handle.update(mailbox_hash, &event)?;
}
self.add_refresh_event(std::mem::replace(
&mut event[0].1,
RefreshEvent {
account_hash: self.uid_store.account_hash,
mailbox_hash,
kind: Rescan,
},
));
}
UntaggedResponse::Exists(n) => {
debug!("exists {}", n);
try_fail!(
mailbox_hash,
self.send_command(format!("FETCH {} (UID FLAGS RFC822)", n).as_bytes()).await
self.read_response(&mut response, RequiredResponses::FETCH_REQUIRED).await
);
match super::protocol_parser::fetch_responses(&response) {
Ok((_, v, _)) => {
'fetch_responses: for FetchResponse {
uid, flags, body, ..
} in v
{
if uid.is_none() || flags.is_none() || body.is_none() {
continue;
}
let uid = uid.unwrap();
if self
.uid_store
.uid_index
.lock()
.unwrap()
.contains_key(&(mailbox_hash, uid))
{
continue 'fetch_responses;
}
let env_hash = generate_envelope_hash(&mailbox.imap_path(), &uid);
self.uid_store
.msn_index
.lock()
.unwrap()
.entry(mailbox_hash)
.or_default()
.push(uid);
if let Ok(mut env) =
Envelope::from_bytes(body.unwrap(), flags.as_ref().map(|&(f, _)| f))
{
env.set_hash(env_hash);
self.uid_store
.hash_index
.lock()
.unwrap()
.insert(env_hash, (uid, mailbox_hash));
self.uid_store
.uid_index
.lock()
.unwrap()
.insert((mailbox_hash, uid), env_hash);
if let Some((_, keywords)) = flags {
let mut tag_lck = self.uid_store.tag_index.write().unwrap();
for f in keywords {
let hash = tag_hash!(f);
if !tag_lck.contains_key(&hash) {
tag_lck.insert(hash, f);
}
env.labels_mut().push(hash);
}
}
debug!(
"Create event {} {} {}",
env.hash(),
env.subject(),
mailbox.path(),
);
if !env.is_seen() {
mailbox.unseen.lock().unwrap().insert_new(env.hash());
}
mailbox.exists.lock().unwrap().insert_new(env.hash());
let mut event: [(UID, RefreshEvent); 1] = [(
uid,
RefreshEvent {
account_hash: self.uid_store.account_hash,
mailbox_hash,
kind: Create(Box::new(env)),
},
)];
if self.uid_store.keep_offline_cache {
cache_handle.update(mailbox_hash, &event)?;
}
self.add_refresh_event(std::mem::replace(
&mut event[0].1,
RefreshEvent {
account_hash: self.uid_store.account_hash,
mailbox_hash,
kind: Rescan,
},
));
}
}
}
Err(e) => {
debug!(e);
}
}
}
UntaggedResponse::Recent(_) => {
try_fail!(
mailbox_hash,
self.send_command(b"UID SEARCH RECENT").await
self.read_response(&mut response, RequiredResponses::SEARCH).await
);
match super::protocol_parser::search_results_raw(&response)
.map(|(_, v)| v)
.map_err(MeliError::from)
{
Ok(&[]) => {
debug!("UID SEARCH RECENT returned no results");
}
Ok(v) => {
let command = {
let mut iter = v.split(u8::is_ascii_whitespace);
let first = iter.next().unwrap_or(v);
let mut accum = format!("{}", to_str!(first).trim());
for ms in iter {
accum = format!("{},{}", accum, to_str!(ms).trim());
}
format!("UID FETCH {} (FLAGS RFC822)", accum)
};
try_fail!(
mailbox_hash,
self.send_command(command.as_bytes()).await
self.read_response(&mut response, RequiredResponses::FETCH_REQUIRED).await
);
debug!(&response);
match super::protocol_parser::fetch_responses(&response) {
Ok((_, v, _)) => {
for FetchResponse {
uid, flags, body, ..
} in v
{
if uid.is_none() || flags.is_none() || body.is_none() {
continue;
}
let uid = uid.unwrap();
if !self
.uid_store
.uid_index
.lock()
.unwrap()
.contains_key(&(mailbox_hash, uid))
{
if let Ok(mut env) = Envelope::from_bytes(
body.unwrap(),
flags.as_ref().map(|&(f, _)| f),
) {
self.uid_store
.hash_index
.lock()
.unwrap()
.insert(env.hash(), (uid, mailbox_hash));
self.uid_store
.uid_index
.lock()
.unwrap()
.insert((mailbox_hash, uid), env.hash());
debug!(
"Create event {} {} {}",
env.hash(),
env.subject(),
mailbox.path(),
);
if let Some((_, keywords)) = flags {
let mut tag_lck =
self.uid_store.tag_index.write().unwrap();
for f in keywords {
let hash = tag_hash!(f);
if !tag_lck.contains_key(&hash) {
tag_lck.insert(hash, f);
}
env.labels_mut().push(hash);
}
}
if !env.is_seen() {
mailbox
.unseen
.lock()
.unwrap()
.insert_new(env.hash());
}
mailbox.exists.lock().unwrap().insert_new(env.hash());
let mut event: [(UID, RefreshEvent); 1] = [(
uid,
RefreshEvent {
account_hash: self.uid_store.account_hash,
mailbox_hash,
kind: Create(Box::new(env)),
},
)];
if self.uid_store.keep_offline_cache {
cache_handle.update(mailbox_hash, &event)?;
}
self.add_refresh_event(std::mem::replace(
&mut event[0].1,
RefreshEvent {
account_hash: self.uid_store.account_hash,
mailbox_hash,
kind: Rescan,
},
));
}
}
}
}
Err(e) => {
debug!(e);
}
}
}
Err(e) => {
debug!(
"UID SEARCH RECENT err: {}\nresp: {}",
e.to_string(),
to_str!(&response)
);
}
}
}
UntaggedResponse::Fetch(FetchResponse {
uid,
message_sequence_number: msg_seq,
modseq,
flags,
body: _,
envelope: _,
raw_fetch_value: _,
}) => {
if let Some(flags) = flags {
let uid = if let Some(uid) = uid {
uid
} else {
try_fail!(
mailbox_hash,
self.send_command(format!("UID SEARCH {}", msg_seq).as_bytes())
.await,
self.read_response(&mut response, RequiredResponses::SEARCH)
.await,
);
debug!(to_str!(&response));
match super::protocol_parser::search_results(
response.split_rn().next().unwrap_or(b""),
)
.map(|(_, v)| v)
{
Ok(mut v) if v.len() == 1 => v.pop().unwrap(),
Ok(_) => {
return Ok(false);
}
Err(e) => {
debug!("SEARCH error failed: {}", e);
debug!(to_str!(&response));
return Ok(false);
}
}
};
debug!("fetch uid {} {:?}", uid, flags);
let env_hash = self
.uid_store
.uid_index
.lock()
.unwrap()
.get(&(mailbox_hash, uid))
.copied();
if let Some(env_hash) = env_hash {
if !flags.0.intersects(crate::email::Flag::SEEN) {
mailbox.unseen.lock().unwrap().insert_new(env_hash);
} else {
mailbox.unseen.lock().unwrap().remove(env_hash);
}
if let Some(modseq) = modseq {
self.uid_store
.modseq
.lock()
.unwrap()
.insert(env_hash, modseq);
}
let mut event: [(UID, RefreshEvent); 1] = [(
uid,
RefreshEvent {
account_hash: self.uid_store.account_hash,
mailbox_hash,
kind: NewFlags(env_hash, flags),
},
)];
if self.uid_store.keep_offline_cache {
cache_handle.update(mailbox_hash, &event)?;
}
self.add_refresh_event(std::mem::replace(
&mut event[0].1,
RefreshEvent {
account_hash: self.uid_store.account_hash,
mailbox_hash,
kind: Rescan,
},
));
};
}
}
}
Ok(true)
}
}