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173 lines
6.4 KiB
Rust
173 lines
6.4 KiB
Rust
/*
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* meli - imap module.
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*
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* Copyright 2017 - 2019 Manos Pitsidianakis
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*
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* This file is part of meli.
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*
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* meli is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* meli is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with meli. If not, see <http://www.gnu.org/licenses/>.
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*/
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use super::*;
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use crate::backends::*;
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use crate::email::*;
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use crate::error::MeliError;
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use std::sync::Arc;
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/// `BackendOp` implementor for Imap
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#[derive(Debug, Clone)]
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pub struct ImapOp {
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uid: UID,
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mailbox_hash: MailboxHash,
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connection: Arc<FutureMutex<ImapConnection>>,
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uid_store: Arc<UIDStore>,
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}
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impl ImapOp {
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pub fn new(
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uid: UID,
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mailbox_hash: MailboxHash,
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connection: Arc<FutureMutex<ImapConnection>>,
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uid_store: Arc<UIDStore>,
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) -> Self {
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ImapOp {
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uid,
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connection,
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mailbox_hash,
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uid_store,
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}
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}
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}
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impl BackendOp for ImapOp {
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fn as_bytes(&mut self) -> ResultFuture<Vec<u8>> {
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let connection = self.connection.clone();
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let mailbox_hash = self.mailbox_hash;
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let uid = self.uid;
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let uid_store = self.uid_store.clone();
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Ok(Box::pin(async move {
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let exists_in_cache = {
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let mut bytes_cache = uid_store.byte_cache.lock()?;
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let cache = bytes_cache.entry(uid).or_default();
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cache.bytes.is_some()
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};
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if !exists_in_cache {
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let mut response = Vec::with_capacity(8 * 1024);
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{
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let mut conn = timeout(uid_store.timeout, connection.lock()).await?;
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conn.connect().await?;
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conn.examine_mailbox(mailbox_hash, &mut response, false)
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.await?;
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conn.send_command(format!("UID FETCH {} (FLAGS RFC822)", uid).as_bytes())
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.await?;
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conn.read_response(&mut response, RequiredResponses::FETCH_REQUIRED)
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.await?;
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}
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debug!(
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"fetch response is {} bytes and {} lines",
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response.len(),
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String::from_utf8_lossy(&response).lines().count()
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);
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let mut results = protocol_parser::fetch_responses(&response)?.1;
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if results.len() != 1 {
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return Err(MeliError::new(format!(
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"Invalid/unexpected response: {:?}",
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response
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))
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.set_summary(format!("message with UID {} was not found?", uid)));
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}
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let FetchResponse {
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uid: _uid,
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flags: _flags,
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body,
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..
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} = results.pop().unwrap();
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let _uid = _uid.unwrap();
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assert_eq!(_uid, uid);
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assert!(body.is_some());
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let mut bytes_cache = uid_store.byte_cache.lock()?;
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let cache = bytes_cache.entry(uid).or_default();
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if let Some((_flags, _)) = _flags {
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//flags.lock().await.set(Some(_flags));
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cache.flags = Some(_flags);
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}
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cache.bytes = Some(body.unwrap().to_vec());
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}
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let mut bytes_cache = uid_store.byte_cache.lock()?;
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let cache = bytes_cache.entry(uid).or_default();
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let ret = cache.bytes.clone().unwrap();
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Ok(ret)
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}))
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}
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fn fetch_flags(&self) -> ResultFuture<Flag> {
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let mut response = Vec::with_capacity(8 * 1024);
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let connection = self.connection.clone();
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let mailbox_hash = self.mailbox_hash;
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let uid = self.uid;
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let uid_store = self.uid_store.clone();
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Ok(Box::pin(async move {
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let exists_in_cache = {
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let mut bytes_cache = uid_store.byte_cache.lock()?;
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let cache = bytes_cache.entry(uid).or_default();
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cache.flags.is_some()
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};
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if !exists_in_cache {
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let mut conn = connection.lock().await;
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conn.connect().await?;
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conn.examine_mailbox(mailbox_hash, &mut response, false)
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.await?;
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conn.send_command(format!("UID FETCH {} FLAGS", uid).as_bytes())
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.await?;
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conn.read_response(&mut response, RequiredResponses::FETCH_REQUIRED)
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.await?;
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debug!(
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"fetch response is {} bytes and {} lines",
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response.len(),
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String::from_utf8_lossy(&response).lines().count()
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);
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let v = protocol_parser::uid_fetch_flags_responses(&response)
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.map(|(_, v)| v)
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.map_err(MeliError::from)?;
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if v.len() != 1 {
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debug!("responses len is {}", v.len());
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debug!(String::from_utf8_lossy(&response));
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/* TODO: Trigger cache invalidation here. */
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debug!("message with UID {} was not found", uid);
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return Err(MeliError::new(format!(
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"Invalid/unexpected response: {:?}",
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response
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))
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.set_summary(format!("message with UID {} was not found?", uid)));
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}
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let (_uid, (_flags, _)) = v[0];
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assert_eq!(_uid, uid);
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let mut bytes_cache = uid_store.byte_cache.lock()?;
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let cache = bytes_cache.entry(uid).or_default();
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cache.flags = Some(_flags);
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}
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{
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let val = {
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let mut bytes_cache = uid_store.byte_cache.lock()?;
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let cache = bytes_cache.entry(uid).or_default();
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cache.flags
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};
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Ok(val.unwrap())
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}
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}))
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}
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}
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