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meli/melib/src/backends/imap/cursor.rs

81 lines
2.7 KiB
Rust

/*
* ____
*
* Copyright ____ Manos Pitsidianakis
*
* This file is part of ____.
*
* ____ 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.
*
* ____ 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 ____. If not, see <http://www.gnu.org/licenses/>.
*/
use super::*;
#[derive(Debug)]
pub struct ImapCursor {
pub connection: Arc<FutureMutex<ImapConnection>>,
pub mailbox_hash: MailboxHash,
pub uid_store: Arc<UIDStore>,
}
impl crate::cursor::Cursor for ImapCursor {
fn fetch(&self, start: usize, count: usize) -> Result<EnvelopeStream> {
let connection = self.connection.clone();
let mailbox_hash = self.mailbox_hash;
let uid_store = self.uid_store.clone();
Ok(Box::pin(async_stream::try_stream! {
let mut response = Vec::with_capacity(8 * 1024);
{
let f = &uid_store.mailboxes.lock().await[&mailbox_hash];
if f.no_select {
yield vec![];
return;
}
};
loop {
{
let mut conn = connection.lock().await;
conn.examine_mailbox(mailbox_hash, &mut response, false)
.await?;
conn.send_command_raw(b"UID SORT (REVERSE ARRIVAL) UTF-8 ALL").await?;
conn.read_response(&mut response, RequiredResponses::empty())
.await?;
}
yield vec![];
return;
}
}))
}
fn total(&self) -> ResultFuture<Option<usize>> {
Err(Error::new("Cursor not supported in this backend.").set_kind(ErrorKind::NotSupported))
}
fn unseen(&self) -> ResultFuture<Option<usize>> {
Err(Error::new("Cursor not supported in this backend.").set_kind(ErrorKind::NotSupported))
}
fn has_updates(&self) -> ResultFuture<bool> {
Err(Error::new("Cursor not supported in this backend.").set_kind(ErrorKind::NotSupported))
}
fn reset(&self) -> ResultFuture<()> {
Err(Error::new("Cursor not supported in this backend.").set_kind(ErrorKind::NotSupported))
}
fn query(&self) -> Result<Arc<Query>> {
Err(Error::new("Cursor not supported in this backend.").set_kind(ErrorKind::NotSupported))
}
}