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/*
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* meli - imap module.
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*
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* Copyright 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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#[macro_use]
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mod protocol_parser;
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pub use protocol_parser::{UntaggedResponse::*, *};
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mod folder;
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pub use folder::*;
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mod operations;
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pub use operations::*;
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mod connection;
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pub use connection::*;
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mod watch;
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pub use watch::*;
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use crate::async_workers::{Async, AsyncBuilder, AsyncStatus, WorkContext};
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use crate::backends::BackendOp;
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use crate::backends::FolderHash;
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use crate::backends::RefreshEvent;
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use crate::backends::RefreshEventKind::{self, *};
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use crate::backends::{BackendFolder, Folder, FolderOperation, MailBackend, RefreshEventConsumer};
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use crate::conf::AccountSettings;
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use crate::email::*;
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use crate::error::{MeliError, Result};
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use fnv::{FnvHashMap, FnvHashSet};
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use std::collections::hash_map::DefaultHasher;
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use std::hash::Hasher;
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use std::str::FromStr;
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use std::sync::{Arc, Mutex, RwLock};
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pub type UID = usize;
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pub static SUPPORTED_CAPABILITIES: &'static [&'static str] = &["IDLE"];
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#[derive(Debug, Default)]
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pub struct EnvelopeCache {
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bytes: Option<String>,
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headers: Option<String>,
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body: Option<String>,
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flags: Option<Flag>,
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}
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#[derive(Debug, Clone)]
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pub struct ImapServerConf {
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pub server_hostname: String,
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pub server_username: String,
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pub server_password: String,
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pub server_port: u16,
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pub use_starttls: bool,
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pub danger_accept_invalid_certs: bool,
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}
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struct IsSubscribedFn(Box<dyn Fn(&str) -> bool + Send + Sync>);
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impl std::fmt::Debug for IsSubscribedFn {
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fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
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write!(f, "IsSubscribedFn Box")
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}
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}
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impl std::ops::Deref for IsSubscribedFn {
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type Target = Box<dyn Fn(&str) -> bool + Send + Sync>;
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fn deref(&self) -> &Box<dyn Fn(&str) -> bool + Send + Sync> {
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&self.0
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}
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}
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type Capabilities = FnvHashSet<Vec<u8>>;
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#[derive(Debug)]
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pub struct UIDStore {
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uidvalidity: Arc<Mutex<FnvHashMap<FolderHash, UID>>>,
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hash_index: Arc<Mutex<FnvHashMap<EnvelopeHash, (UID, FolderHash)>>>,
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uid_index: Arc<Mutex<FnvHashMap<UID, EnvelopeHash>>>,
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byte_cache: Arc<Mutex<FnvHashMap<UID, EnvelopeCache>>>,
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}
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#[derive(Debug)]
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pub struct ImapType {
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account_name: String,
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online: Arc<Mutex<bool>>,
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is_subscribed: Arc<IsSubscribedFn>,
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connection: Arc<Mutex<ImapConnection>>,
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server_conf: ImapServerConf,
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uid_store: Arc<UIDStore>,
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folders: Arc<RwLock<FnvHashMap<FolderHash, ImapFolder>>>,
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}
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impl MailBackend for ImapType {
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fn is_online(&self) -> bool {
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*self.online.lock().unwrap()
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}
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fn get(&mut self, folder: &Folder) -> Async<Result<Vec<Envelope>>> {
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macro_rules! exit_on_error {
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($tx:expr,$($result:expr)+) => {
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$(if let Err(e) = $result {
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$tx.send(AsyncStatus::Payload(Err(e.into()))).unwrap();
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$tx.send(AsyncStatus::Finished).unwrap();
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return;
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})+
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};
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};
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let mut w = AsyncBuilder::new();
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let handle = {
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let tx = w.tx();
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let uid_store = self.uid_store.clone();
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let folder_path = folder.path().to_string();
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let folder_hash = folder.hash();
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let (permissions, folder_exists) = {
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let f = &self.folders.read().unwrap()[&folder_hash];
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(f.permissions.clone(), f.exists.clone())
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};
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let connection = self.connection.clone();
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let closure = move |_work_context| {
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let connection = connection.clone();
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let tx = tx.clone();
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let mut response = String::with_capacity(8 * 1024);
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let conn = connection.lock();
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exit_on_error!(&tx, conn);
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let mut conn = conn.unwrap();
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debug!("locked for get {}", folder_path);
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/* first SELECT the mailbox to get READ/WRITE permissions (because EXAMINE only
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* returns READ-ONLY for both cases) */
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exit_on_error!(&tx,
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conn.send_command(format!("SELECT {}", folder_path).as_bytes())
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conn.read_response(&mut response)
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);
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let examine_response = protocol_parser::select_response(&response);
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exit_on_error!(&tx, examine_response);
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let examine_response = examine_response.unwrap();
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debug!(
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"folder: {} examine_response: {:?}",
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folder_path, examine_response
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);
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let mut exists: usize = examine_response.uidnext - 1;
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{
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let mut uidvalidities = uid_store.uidvalidity.lock().unwrap();
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let v = uidvalidities
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.entry(folder_hash)
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.or_insert(examine_response.uidvalidity);
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*v = examine_response.uidvalidity;
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let mut permissions = permissions.lock().unwrap();
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permissions.create_messages = !examine_response.read_only;
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permissions.remove_messages = !examine_response.read_only;
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permissions.set_flags = !examine_response.read_only;
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permissions.rename_messages = !examine_response.read_only;
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permissions.delete_messages = !examine_response.read_only;
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permissions.delete_messages = !examine_response.read_only;
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let mut folder_exists = folder_exists.lock().unwrap();
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*folder_exists = exists;
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}
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/* reselecting the same mailbox with EXAMINE prevents expunging it */
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exit_on_error!(&tx,
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conn.send_command(format!("EXAMINE {}", folder_path).as_bytes())
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conn.read_response(&mut response)
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);
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while exists > 1 {
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let mut envelopes = vec![];
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exit_on_error!(&tx,
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conn.send_command(format!("UID FETCH {}:{} (UID FLAGS ENVELOPE BODYSTRUCTURE)", std::cmp::max(exists.saturating_sub(20000), 1), exists).as_bytes())
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conn.read_response(&mut response)
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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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response.lines().collect::<Vec<&str>>().len()
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);
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match protocol_parser::uid_fetch_envelopes_response(response.as_bytes())
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.to_full_result()
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.map_err(MeliError::from)
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{
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Ok(v) => {
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debug!("responses len is {}", v.len());
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for (uid, flags, mut env) in v {
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let mut h = DefaultHasher::new();
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h.write_usize(uid);
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h.write(folder_path.as_bytes());
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env.set_hash(h.finish());
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if let Some(flags) = flags {
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env.set_flags(flags);
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}
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uid_store
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.hash_index
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.lock()
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.unwrap()
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.insert(env.hash(), (uid, folder_hash));
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uid_store.uid_index.lock().unwrap().insert(uid, env.hash());
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envelopes.push(env);
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}
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}
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Err(e) => {
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debug!(&e);
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tx.send(AsyncStatus::Payload(Err(e))).unwrap();
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}
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}
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exists = std::cmp::max(exists.saturating_sub(20000), 1);
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debug!("sending payload");
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tx.send(AsyncStatus::Payload(Ok(envelopes))).unwrap();
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}
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drop(conn);
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tx.send(AsyncStatus::Finished).unwrap();
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};
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Box::new(closure)
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};
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w.build(handle)
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}
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fn watch(
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&self,
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sender: RefreshEventConsumer,
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work_context: WorkContext,
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) -> Result<std::thread::ThreadId> {
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let has_idle: bool = self
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.connection
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.lock()
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.unwrap()
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.capabilities
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.contains(&b"IDLE"[0..]);
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let folders = self.folders.clone();
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let conn = ImapConnection::new_connection(&self.server_conf);
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let main_conn = self.connection.clone();
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let is_online = self.online.clone();
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let uid_store = self.uid_store.clone();
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let handle = std::thread::Builder::new()
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.name(format!("{} imap connection", self.account_name.as_str(),))
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.spawn(move || {
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let thread = std::thread::current();
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work_context
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.set_status
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.send((thread.id(), "watching".to_string()))
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.unwrap();
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let kit = ImapWatchKit {
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conn,
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is_online,
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main_conn,
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uid_store,
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folders,
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sender,
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work_context,
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};
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if has_idle {
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idle(kit).ok().take();
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} else {
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poll_with_examine(kit).ok().take();
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}
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})?;
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Ok(handle.thread().id())
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}
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fn folders(&self) -> Result<FnvHashMap<FolderHash, Folder>> {
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{
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let folders = self.folders.read().unwrap();
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if !folders.is_empty() {
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return Ok(folders
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.iter()
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.map(|(h, f)| (*h, Box::new(Clone::clone(f)) as Folder))
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.collect());
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}
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}
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let mut folders = self.folders.write()?;
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*folders = ImapType::imap_folders(&self.connection);
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folders.retain(|_, f| (self.is_subscribed)(f.path()));
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let keys = folders.keys().cloned().collect::<FnvHashSet<FolderHash>>();
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for f in folders.values_mut() {
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f.children.retain(|c| keys.contains(c));
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}
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*self.online.lock().unwrap() = true;
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Ok(folders
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.iter()
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.map(|(h, f)| (*h, Box::new(Clone::clone(f)) as Folder))
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.collect())
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}
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fn operation(&self, hash: EnvelopeHash) -> Box<dyn BackendOp> {
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let (uid, folder_hash) = self.uid_store.hash_index.lock().unwrap()[&hash];
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Box::new(ImapOp::new(
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uid,
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self.folders.read().unwrap()[&folder_hash]
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.path()
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.to_string(),
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self.connection.clone(),
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self.uid_store.clone(),
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))
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}
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fn save(&self, bytes: &[u8], folder: &str, flags: Option<Flag>) -> Result<()> {
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let path = {
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let folders = self.folders.read().unwrap();
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let f_result = folders.values().find(|v| v.name == folder);
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if f_result
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.map(|f| !f.permissions.lock().unwrap().create_messages)
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.unwrap_or(false)
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{
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return Err(MeliError::new(format!(
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"You are not allowed to create messages in folder {}",
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folder
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)));
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}
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f_result
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.map(|v| v.path().to_string())
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.ok_or(MeliError::new(format!(
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"Folder with name {} not found.",
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folder
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)))?
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};
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let mut response = String::with_capacity(8 * 1024);
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let mut conn = self.connection.lock().unwrap();
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let flags = flags.unwrap_or(Flag::empty());
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conn.send_command(
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format!(
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"APPEND \"{}\" ({}) {{{}}}",
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&path,
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flags_to_imap_list!(flags),
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bytes.len()
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)
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.as_bytes(),
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)?;
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// wait for "+ Ready for literal data" reply
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conn.wait_for_continuation_request()?;
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conn.send_literal(bytes)?;
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conn.read_response(&mut response)?;
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Ok(())
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}
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fn folder_operation(&mut self, path: &str, op: FolderOperation) -> Result<()> {
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use FolderOperation::*;
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match (
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&op,
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self.folders
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.read()
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.unwrap()
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.values()
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.any(|f| f.path == path),
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) {
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(Create, true) => {
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return Err(MeliError::new(format!(
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|
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"Folder named `{}` in account `{}` already exists.",
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path, self.account_name,
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)));
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}
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(op, false) if *op != Create => {
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return Err(MeliError::new(format!(
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|
|
"No folder named `{}` in account `{}`",
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path, self.account_name,
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|
|
|
)));
|
|
|
|
}
|
|
|
|
_ => {}
|
|
|
|
}
|
|
|
|
|
|
|
|
let mut response = String::with_capacity(8 * 1024);
|
|
|
|
match op {
|
|
|
|
Create => {
|
|
|
|
let mut conn = self.connection.lock()?;
|
|
|
|
conn.send_command(format!("CREATE \"{}\"", path,).as_bytes())?;
|
|
|
|
conn.read_response(&mut response)?;
|
|
|
|
conn.send_command(format!("SUBSCRIBE \"{}\"", path,).as_bytes())?;
|
|
|
|
conn.read_response(&mut response)?;
|
|
|
|
}
|
|
|
|
Rename(dest) => {
|
|
|
|
let mut conn = self.connection.lock()?;
|
|
|
|
conn.send_command(format!("RENAME \"{}\" \"{}\"", path, dest).as_bytes())?;
|
|
|
|
conn.read_response(&mut response)?;
|
|
|
|
}
|
|
|
|
Delete => {
|
|
|
|
let mut conn = self.connection.lock()?;
|
|
|
|
conn.send_command(format!("DELETE \"{}\"", path,).as_bytes())?;
|
|
|
|
conn.read_response(&mut response)?;
|
|
|
|
}
|
|
|
|
Subscribe => {
|
|
|
|
let mut conn = self.connection.lock()?;
|
|
|
|
conn.send_command(format!("SUBSCRIBE \"{}\"", path,).as_bytes())?;
|
|
|
|
conn.read_response(&mut response)?;
|
|
|
|
}
|
|
|
|
Unsubscribe => {
|
|
|
|
let mut conn = self.connection.lock()?;
|
|
|
|
conn.send_command(format!("UNSUBSCRIBE \"{}\"", path,).as_bytes())?;
|
|
|
|
conn.read_response(&mut response)?;
|
|
|
|
}
|
|
|
|
SetPermissions(_new_val) => {
|
|
|
|
unimplemented!();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
Ok(())
|
|
|
|
}
|
|
|
|
|
|
|
|
fn as_any(&self) -> &dyn::std::any::Any {
|
|
|
|
self
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
macro_rules! get_conf_val {
|
|
|
|
($s:ident[$var:literal]) => {
|
|
|
|
$s.extra.get($var).ok_or_else(|| {
|
|
|
|
MeliError::new(format!(
|
|
|
|
"Configuration error ({}): IMAP connection requires the field `{}` set",
|
|
|
|
$s.name.as_str(),
|
|
|
|
$var
|
|
|
|
))
|
|
|
|
})
|
|
|
|
};
|
|
|
|
($s:ident[$var:literal], $default:expr) => {
|
|
|
|
$s.extra
|
|
|
|
.get($var)
|
|
|
|
.map(|v| {
|
|
|
|
<_>::from_str(v).map_err(|e| {
|
|
|
|
MeliError::new(format!(
|
|
|
|
"Configuration error ({}): Invalid value for field `{}`: {}\n{}",
|
|
|
|
$s.name.as_str(),
|
|
|
|
$var,
|
|
|
|
v,
|
|
|
|
e
|
|
|
|
))
|
|
|
|
})
|
|
|
|
})
|
|
|
|
.unwrap_or_else(|| Ok($default))
|
|
|
|
};
|
|
|
|
}
|
|
|
|
|
|
|
|
impl ImapType {
|
|
|
|
pub fn new(
|
|
|
|
s: &AccountSettings,
|
|
|
|
is_subscribed: Box<dyn Fn(&str) -> bool + Send + Sync>,
|
|
|
|
) -> Result<Box<dyn MailBackend>> {
|
|
|
|
let server_hostname = get_conf_val!(s["server_hostname"])?;
|
|
|
|
let server_username = get_conf_val!(s["server_username"])?;
|
|
|
|
let server_password = get_conf_val!(s["server_password"])?;
|
|
|
|
let server_port = get_conf_val!(s["server_port"], 143)?;
|
|
|
|
let use_starttls = get_conf_val!(s["use_starttls"], {
|
|
|
|
if server_port == 993 {
|
|
|
|
false
|
|
|
|
} else {
|
|
|
|
true
|
|
|
|
}
|
|
|
|
})?;
|
|
|
|
let danger_accept_invalid_certs: bool =
|
|
|
|
get_conf_val!(s["danger_accept_invalid_certs"], false)?;
|
|
|
|
let server_conf = ImapServerConf {
|
|
|
|
server_hostname: server_hostname.to_string(),
|
|
|
|
server_username: server_username.to_string(),
|
|
|
|
server_password: server_password.to_string(),
|
|
|
|
server_port,
|
|
|
|
use_starttls,
|
|
|
|
danger_accept_invalid_certs,
|
|
|
|
};
|
|
|
|
let connection = ImapConnection::new_connection(&server_conf);
|
|
|
|
|
|
|
|
Ok(Box::new(ImapType {
|
|
|
|
account_name: s.name().to_string(),
|
|
|
|
online: Arc::new(Mutex::new(false)),
|
|
|
|
server_conf,
|
|
|
|
is_subscribed: Arc::new(IsSubscribedFn(is_subscribed)),
|
|
|
|
|
|
|
|
folders: Arc::new(RwLock::new(Default::default())),
|
|
|
|
connection: Arc::new(Mutex::new(connection)),
|
|
|
|
uid_store: Arc::new(UIDStore {
|
|
|
|
uidvalidity: Default::default(),
|
|
|
|
hash_index: Default::default(),
|
|
|
|
uid_index: Default::default(),
|
|
|
|
byte_cache: Default::default(),
|
|
|
|
}),
|
|
|
|
}))
|
|
|
|
}
|
|
|
|
|
|
|
|
pub fn shell(&mut self) {
|
|
|
|
let mut conn = ImapConnection::new_connection(&self.server_conf);
|
|
|
|
let mut res = String::with_capacity(8 * 1024);
|
|
|
|
conn.read_response(&mut res).unwrap();
|
|
|
|
debug!("out: {}", &res);
|
|
|
|
|
|
|
|
let mut input = String::new();
|
|
|
|
loop {
|
|
|
|
use std::io;
|
|
|
|
input.clear();
|
|
|
|
|
|
|
|
match io::stdin().read_line(&mut input) {
|
|
|
|
Ok(_) => {
|
|
|
|
conn.send_command(input.as_bytes()).unwrap();
|
|
|
|
conn.read_lines(&mut res, String::new()).unwrap();
|
|
|
|
if input.trim() == "IDLE" {
|
|
|
|
let mut iter = ImapBlockingConnection::from(conn);
|
|
|
|
while let Some(line) = iter.next() {
|
|
|
|
debug!("out: {}", unsafe { std::str::from_utf8_unchecked(&line) });
|
|
|
|
}
|
|
|
|
conn = iter.into_conn();
|
|
|
|
}
|
|
|
|
debug!("out: {}", &res);
|
|
|
|
if input.trim().eq_ignore_ascii_case("logout") {
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
Err(error) => debug!("error: {}", error),
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
pub fn imap_folders(
|
|
|
|
connection: &Arc<Mutex<ImapConnection>>,
|
|
|
|
) -> FnvHashMap<FolderHash, ImapFolder> {
|
|
|
|
let mut folders: FnvHashMap<FolderHash, ImapFolder> = Default::default();
|
|
|
|
let mut res = String::with_capacity(8 * 1024);
|
|
|
|
let mut conn = connection.lock().unwrap();
|
|
|
|
conn.send_command(b"LIST \"\" \"*\"").unwrap();
|
|
|
|
conn.read_response(&mut res).unwrap();
|
|
|
|
debug!("out: {}", &res);
|
|
|
|
for l in res.lines().map(|l| l.trim()) {
|
|
|
|
if let Ok(mut folder) =
|
|
|
|
protocol_parser::list_folder_result(l.as_bytes()).to_full_result()
|
|
|
|
{
|
|
|
|
if let Some(parent) = folder.parent {
|
|
|
|
if folders.contains_key(&parent) {
|
|
|
|
folders
|
|
|
|
.entry(parent)
|
|
|
|
.and_modify(|e| e.children.push(folder.hash));
|
|
|
|
} else {
|
|
|
|
/* Insert dummy parent entry, populating only the children field. Later
|
|
|
|
* when we encounter the parent entry we will swap its children with
|
|
|
|
* dummy's */
|
|
|
|
folders.insert(
|
|
|
|
parent,
|
|
|
|
ImapFolder {
|
|
|
|
children: vec![folder.hash],
|
|
|
|
..ImapFolder::default()
|
|
|
|
},
|
|
|
|
);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if folders.contains_key(&folder.hash) {
|
|
|
|
let entry = folders.entry(folder.hash).or_default();
|
|
|
|
std::mem::swap(&mut entry.children, &mut folder.children);
|
|
|
|
*entry = folder;
|
|
|
|
} else {
|
|
|
|
folders.insert(folder.hash, folder);
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
debug!("parse error for {:?}", l);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
debug!(folders)
|
|
|
|
}
|
|
|
|
|
|
|
|
pub fn capabilities(&self) -> Vec<String> {
|
|
|
|
self.connection
|
|
|
|
.lock()
|
|
|
|
.unwrap()
|
|
|
|
.capabilities
|
|
|
|
.iter()
|
|
|
|
.map(|c| String::from_utf8_lossy(c).into())
|
|
|
|
.collect::<Vec<String>>()
|
|
|
|
}
|
|
|
|
|
|
|
|
pub fn search(
|
|
|
|
&self,
|
|
|
|
query: String,
|
|
|
|
folder_hash: FolderHash,
|
|
|
|
) -> Result<crate::structs::StackVec<EnvelopeHash>> {
|
|
|
|
let folders_lck = self.folders.read()?;
|
|
|
|
let mut response = String::with_capacity(8 * 1024);
|
|
|
|
let mut conn = self.connection.lock()?;
|
|
|
|
conn.send_command(format!("EXAMINE {}", folders_lck[&folder_hash].path()).as_bytes())?;
|
|
|
|
conn.read_response(&mut response)?;
|
|
|
|
conn.send_command(format!("UID SEARCH CHARSET UTF-8 {}", query).as_bytes())?;
|
|
|
|
conn.read_response(&mut response)?;
|
|
|
|
debug!(&response);
|
|
|
|
|
|
|
|
let mut lines = response.lines();
|
|
|
|
for l in lines.by_ref() {
|
|
|
|
if l.starts_with("* SEARCH") {
|
|
|
|
use std::iter::FromIterator;
|
|
|
|
let uid_index = self.uid_store.uid_index.lock()?;
|
|
|
|
return Ok(crate::structs::StackVec::from_iter(
|
|
|
|
l["* SEARCH".len()..]
|
|
|
|
.trim()
|
|
|
|
.split_whitespace()
|
|
|
|
.map(usize::from_str)
|
|
|
|
.filter_map(std::result::Result::ok)
|
|
|
|
.filter_map(|uid| uid_index.get(&uid))
|
|
|
|
.map(|env_hash_ref| *env_hash_ref),
|
|
|
|
));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
Err(MeliError::new(response))
|
|
|
|
}
|
|
|
|
}
|