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/*
* meli - imap module.
*
* Copyright 2017 - 2019 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::*;
use crate::backends::*;
use crate::email::*;
use crate::error::{MeliError, Result};
use std::sync::{Arc, Mutex};
/// `BackendOp` implementor for Imap
#[derive(Debug, Clone)]
pub struct ImapOp {
uid: usize,
mailbox_hash: MailboxHash,
connection: Arc<Mutex<ImapConnection>>,
uid_store: Arc<UIDStore>,
}
impl ImapOp {
pub fn new(
uid: usize,
mailbox_hash: MailboxHash,
connection: Arc<Mutex<ImapConnection>>,
uid_store: Arc<UIDStore>,
) -> Self {
ImapOp {
uid,
connection,
mailbox_hash,
uid_store,
}
}
}
impl BackendOp for ImapOp {
fn as_bytes(&mut self) -> ResultFuture<Vec<u8>> {
let mut bytes_cache = self.uid_store.byte_cache.lock()?;
let cache = bytes_cache.entry(self.uid).or_default();
if cache.bytes.is_none() {
let mut response = String::with_capacity(8 * 1024);
{
let mut conn = try_lock(&self.connection, Some(std::time::Duration::new(2, 0)))?;
conn.examine_mailbox(self.mailbox_hash, &mut response)?;
conn.send_command(format!("UID FETCH {} (FLAGS RFC822)", self.uid).as_bytes())?;
conn.read_response(&mut response, RequiredResponses::FETCH_REQUIRED)?;
}
debug!(
"fetch response is {} bytes and {} lines",
response.len(),
response.lines().count()
);
let UidFetchResponse {
uid, flags, body, ..
} = protocol_parser::uid_fetch_response(&response)?.1;
assert_eq!(uid, self.uid);
assert!(body.is_some());
let mut bytes_cache = self.uid_store.byte_cache.lock()?;
let cache = bytes_cache.entry(self.uid).or_default();
if let Some((flags, _)) = flags {
cache.flags = Some(flags);
}
cache.bytes = Some(unsafe { std::str::from_utf8_unchecked(body.unwrap()).to_string() });
}
let ret = cache.bytes.clone().unwrap().into_bytes();
Ok(Box::pin(async move { Ok(ret) }))
}
fn fetch_flags(&self) -> ResultFuture<Flag> {
let connection = self.connection.clone();
let mailbox_hash = self.mailbox_hash;
let uid = self.uid;
let uid_store = self.uid_store.clone();
let mut response = String::with_capacity(8 * 1024);
Ok(Box::pin(async move {
let exists_in_cache = {
let mut bytes_cache = uid_store.byte_cache.lock()?;
let cache = bytes_cache.entry(uid).or_default();
cache.flags.is_some()
};
if !exists_in_cache {
let mut conn = try_lock(&connection, Some(std::time::Duration::new(2, 0)))?;
conn.examine_mailbox(mailbox_hash, &mut response, false)?;
conn.send_command(format!("UID FETCH {} FLAGS", uid).as_bytes())?;
conn.read_response(&mut response, RequiredResponses::FETCH_REQUIRED)?;
debug!(
"fetch response is {} bytes and {} lines",
response.len(),
response.lines().count()
);
let v = protocol_parser::uid_fetch_flags_response(response.as_bytes())
.map(|(_, v)| v)
.map_err(MeliError::from)?;
if v.len() != 1 {
debug!("responses len is {}", v.len());
debug!(&response);
/* TODO: Trigger cache invalidation here. */
debug!(format!("message with UID {} was not found", uid));
return Err(MeliError::new(format!(
"Invalid/unexpected response: {:?}",
response
))
.set_summary(format!("message with UID {} was not found?", uid)));
}
let (_uid, (_flags, _)) = v[0];
assert_eq!(_uid, uid);
let mut bytes_cache = uid_store.byte_cache.lock()?;
let cache = bytes_cache.entry(uid).or_default();
cache.flags = Some(_flags);
}
{
let val = {
let mut bytes_cache = uid_store.byte_cache.lock()?;
let cache = bytes_cache.entry(uid).or_default();
cache.flags
};
Ok(val.unwrap())
}
}))
}
fn set_flag(
&mut self,
f: Flag,
value: bool,
) -> Result<Pin<Box<dyn Future<Output = Result<()>> + Send>>> {
let flags = self.fetch_flags()?;
let connection = self.connection.clone();
let mailbox_hash = self.mailbox_hash;
let uid = self.uid;
let uid_store = self.uid_store.clone();
let mut response = String::with_capacity(8 * 1024);
Ok(Box::pin(async move {
let mut flags = flags.await?;
flags.set(f, value);
let mut conn = try_lock(&connection, Some(std::time::Duration::new(2, 0)))?;
conn.select_mailbox(mailbox_hash, &mut response, false)?;
debug!(&response);
conn.send_command(
format!(
"UID STORE {} FLAGS.SILENT ({})",
uid,
flags_to_imap_list!(flags)
)
.as_bytes(),
)?;
conn.read_response(&mut response, RequiredResponses::STORE_REQUIRED)?;
debug!(&response);
match protocol_parser::uid_fetch_flags_response(response.as_bytes())
.map(|(_, v)| v)
.map_err(MeliError::from)
{
Ok(v) => {
if v.len() == 1 {
debug!("responses len is {}", v.len());
let (uid, (_flags, _)) = v[0];
assert_eq!(uid, uid);
}
}
Err(e) => {
return Err(e);
}
}
let mut bytes_cache = uid_store.byte_cache.lock()?;
let cache = bytes_cache.entry(uid).or_default();
cache.flags = Some(flags);
Ok(())
}))
}
fn set_tag(
&mut self,
tag: String,
value: bool,
) -> Result<Pin<Box<dyn Future<Output = Result<()>> + Send>>> {
let mut response = String::with_capacity(8 * 1024);
let connection = self.connection.clone();
let mailbox_hash = self.mailbox_hash;
let uid = self.uid;
let uid_store = self.uid_store.clone();
Ok(Box::pin(async move {
let mut conn = try_lock(&connection, Some(std::time::Duration::new(2, 0)))?;
conn.select_mailbox(mailbox_hash, &mut response, false)?;
conn.send_command(
format!(
"UID STORE {} {}FLAGS.SILENT ({})",
uid,
if value { "+" } else { "-" },
&tag
)
.as_bytes(),
)?;
conn.read_response(&mut response, RequiredResponses::STORE_REQUIRED)?;
protocol_parser::uid_fetch_flags_response(response.as_bytes())
.map(|(_, v)| v)
.map_err(MeliError::from)?;
let hash = tag_hash!(tag);
if value {
uid_store.tag_index.write().unwrap().insert(hash, tag);
} else {
uid_store.tag_index.write().unwrap().remove(&hash);
}
Ok(())
}))
}
}