mirror of
https://git.meli.delivery/meli/meli
synced 2024-11-01 15:40:27 +00:00
653 lines
18 KiB
Rust
653 lines
18 KiB
Rust
/*
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* meli - backends module
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*
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* Copyright 2017 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 smallvec::SmallVec;
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#[macro_export]
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macro_rules! tag_hash {
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($tag:ident) => {{
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use std::collections::hash_map::DefaultHasher;
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use std::hash::Hasher;
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let mut hasher = DefaultHasher::new();
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hasher.write($tag.as_bytes());
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hasher.finish()
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}};
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}
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#[cfg(feature = "imap_backend")]
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pub mod imap;
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#[cfg(feature = "notmuch_backend")]
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pub mod notmuch;
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#[cfg(feature = "notmuch_backend")]
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pub use self::notmuch::NotmuchDb;
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#[cfg(feature = "jmap_backend")]
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pub mod jmap;
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#[cfg(feature = "maildir_backend")]
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pub mod maildir;
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#[cfg(feature = "mbox_backend")]
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pub mod mbox;
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#[cfg(feature = "imap_backend")]
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pub use self::imap::ImapType;
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#[cfg(feature = "jmap_backend")]
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pub use self::jmap::JmapType;
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use crate::async_workers::*;
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use crate::conf::AccountSettings;
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use crate::error::{MeliError, Result};
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#[cfg(feature = "maildir_backend")]
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use self::maildir::MaildirType;
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#[cfg(feature = "mbox_backend")]
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use self::mbox::MboxType;
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use super::email::{Envelope, EnvelopeHash, Flag};
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use std::any::Any;
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use std::collections::BTreeMap;
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use std::fmt;
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use std::fmt::Debug;
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use std::ops::Deref;
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use std::sync::{Arc, RwLock};
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pub use futures::stream::Stream;
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use std::future::Future;
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pub use std::pin::Pin;
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use std::collections::HashMap;
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#[macro_export]
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macro_rules! get_path_hash {
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($path:expr) => {{
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use std::collections::hash_map::DefaultHasher;
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use std::hash::{Hash, Hasher};
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let mut hasher = DefaultHasher::new();
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$path.hash(&mut hasher);
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hasher.finish()
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}};
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}
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pub type BackendCreator = Box<
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dyn Fn(
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&AccountSettings,
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Box<dyn Fn(&str) -> bool + Send + Sync>,
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) -> Result<Box<dyn MailBackend>>,
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>;
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/// A hashmap containing all available mail backends.
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/// An abstraction over any available backends.
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pub struct Backends {
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map: HashMap<std::string::String, Backend>,
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}
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pub struct Backend {
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pub create_fn: Box<dyn Fn() -> BackendCreator>,
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pub validate_conf_fn: Box<dyn Fn(&AccountSettings) -> Result<()>>,
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}
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impl Default for Backends {
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fn default() -> Self {
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Backends::new()
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}
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}
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#[cfg(feature = "notmuch_backend")]
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pub const NOTMUCH_ERROR_MSG: &str =
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"libnotmuch5 was not found in your system. Make sure it is installed and in the library paths.\n";
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#[cfg(not(feature = "notmuch_backend"))]
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pub const NOTMUCH_ERROR_MSG: &str = "this version of meli is not compiled with notmuch support. Use an appropriate version and make sure libnotmuch5 is installed and in the library paths.\n";
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impl Backends {
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pub fn new() -> Self {
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let mut b = Backends {
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map: HashMap::with_capacity_and_hasher(1, Default::default()),
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};
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#[cfg(feature = "maildir_backend")]
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{
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b.register(
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"maildir".to_string(),
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Backend {
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create_fn: Box::new(|| Box::new(|f, i| MaildirType::new(f, i))),
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validate_conf_fn: Box::new(MaildirType::validate_config),
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},
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);
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}
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#[cfg(feature = "mbox_backend")]
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{
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b.register(
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"mbox".to_string(),
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Backend {
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create_fn: Box::new(|| Box::new(|f, i| MboxType::new(f, i))),
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validate_conf_fn: Box::new(MboxType::validate_config),
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},
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);
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}
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#[cfg(feature = "imap_backend")]
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{
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b.register(
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"imap".to_string(),
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Backend {
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create_fn: Box::new(|| Box::new(|f, i| imap::ImapType::new(f, i))),
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validate_conf_fn: Box::new(imap::ImapType::validate_config),
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},
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);
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}
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#[cfg(feature = "notmuch_backend")]
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{
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if libloading::Library::new("libnotmuch.so.5").is_ok() {
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b.register(
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"notmuch".to_string(),
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Backend {
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create_fn: Box::new(|| Box::new(|f, i| NotmuchDb::new(f, i))),
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validate_conf_fn: Box::new(NotmuchDb::validate_config),
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},
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);
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}
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}
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#[cfg(feature = "jmap_backend")]
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{
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b.register(
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"jmap".to_string(),
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Backend {
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create_fn: Box::new(|| Box::new(|f, i| JmapType::new(f, i))),
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validate_conf_fn: Box::new(JmapType::validate_config),
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},
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);
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}
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b
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}
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pub fn get(&self, key: &str) -> BackendCreator {
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if !self.map.contains_key(key) {
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if key == "notmuch" {
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eprint!("{}", NOTMUCH_ERROR_MSG);
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}
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panic!("{} is not a valid mail backend", key);
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}
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(self.map[key].create_fn)()
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}
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pub fn register(&mut self, key: String, backend: Backend) {
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if self.map.contains_key(&key) {
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panic!("{} is an already registered backend", key);
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}
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self.map.insert(key, backend);
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}
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pub fn validate_config(&self, key: &str, s: &AccountSettings) -> Result<()> {
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(self
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.map
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.get(key)
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.ok_or_else(|| {
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MeliError::new(format!(
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"{}{} is not a valid mail backend",
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if key == "notmuch" {
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NOTMUCH_ERROR_MSG
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} else {
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""
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},
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key
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))
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})?
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.validate_conf_fn)(s)
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}
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}
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#[derive(Debug, Clone)]
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pub enum RefreshEventKind {
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Update(EnvelopeHash, Box<Envelope>),
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/// Rename(old_hash, new_hash)
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Rename(EnvelopeHash, EnvelopeHash),
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Create(Box<Envelope>),
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Remove(EnvelopeHash),
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NewFlags(EnvelopeHash, (Flag, Vec<String>)),
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Rescan,
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Failure(MeliError),
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}
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#[derive(Debug, Clone)]
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pub struct RefreshEvent {
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mailbox_hash: MailboxHash,
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account_hash: AccountHash,
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kind: RefreshEventKind,
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}
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impl RefreshEvent {
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pub fn mailbox_hash(&self) -> MailboxHash {
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self.mailbox_hash
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}
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pub fn account_hash(&self) -> AccountHash {
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self.account_hash
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}
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pub fn kind(self) -> RefreshEventKind {
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/* consumes self! */
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self.kind
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}
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}
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/// A `RefreshEventConsumer` is a boxed closure that must be used to consume a `RefreshEvent` and
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/// send it to a UI provided channel. We need this level of abstraction to provide an interface for
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/// all users of mailbox refresh events.
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pub struct RefreshEventConsumer(Box<dyn Fn(RefreshEvent) -> () + Send + Sync>);
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impl RefreshEventConsumer {
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pub fn new(b: Box<dyn Fn(RefreshEvent) -> () + Send + Sync>) -> Self {
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RefreshEventConsumer(b)
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}
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pub fn send(&self, r: RefreshEvent) {
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self.0(r);
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}
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}
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impl fmt::Debug for RefreshEventConsumer {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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write!(f, "RefreshEventConsumer")
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}
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}
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pub struct NotifyFn(Box<dyn Fn(MailboxHash) -> () + Send + Sync>);
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impl fmt::Debug for NotifyFn {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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write!(f, "NotifyFn Box")
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}
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}
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impl From<Box<dyn Fn(MailboxHash) -> () + Send + Sync>> for NotifyFn {
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fn from(kind: Box<dyn Fn(MailboxHash) -> () + Send + Sync>) -> Self {
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NotifyFn(kind)
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}
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}
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impl NotifyFn {
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pub fn new(b: Box<dyn Fn(MailboxHash) -> () + Send + Sync>) -> Self {
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NotifyFn(b)
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}
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pub fn notify(&self, f: MailboxHash) {
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self.0(f);
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}
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}
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pub type ResultFuture<T> = Result<Pin<Box<dyn Future<Output = Result<T>> + Send + 'static>>>;
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pub trait MailBackend: ::std::fmt::Debug + Send + Sync {
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fn is_async(&self) -> bool;
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fn is_remote(&self) -> bool;
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fn is_online(&self) -> Result<()> {
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Err(MeliError::new("Unimplemented."))
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}
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fn is_online_async(&self) -> ResultFuture<()> {
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Err(MeliError::new("Unimplemented."))
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}
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fn get(&mut self, mailbox: &Mailbox) -> Result<Async<Result<Vec<Envelope>>>>;
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fn get_async(
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&mut self,
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_mailbox: &Mailbox,
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) -> Result<Pin<Box<dyn Stream<Item = Result<Vec<Envelope>>> + Send + 'static>>> {
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Err(MeliError::new("Unimplemented."))
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}
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fn refresh(
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&mut self,
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_mailbox_hash: MailboxHash,
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_sender: RefreshEventConsumer,
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) -> Result<Async<()>> {
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Err(MeliError::new("Unimplemented."))
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}
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fn refresh_async(
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&mut self,
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_mailbox_hash: MailboxHash,
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_sender: RefreshEventConsumer,
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) -> ResultFuture<()> {
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Err(MeliError::new("Unimplemented."))
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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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fn watch_async(&self, _sender: RefreshEventConsumer) -> ResultFuture<()> {
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Err(MeliError::new("Unimplemented."))
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}
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fn mailboxes(&self) -> Result<HashMap<MailboxHash, Mailbox>>;
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fn mailboxes_async(&self) -> ResultFuture<HashMap<MailboxHash, Mailbox>> {
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Err(MeliError::new("Unimplemented."))
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}
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fn operation(&self, hash: EnvelopeHash) -> Result<Box<dyn BackendOp>>;
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fn save(
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&self,
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bytes: Vec<u8>,
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mailbox_hash: MailboxHash,
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flags: Option<Flag>,
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) -> ResultFuture<()>;
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fn delete(&self, _env_hash: EnvelopeHash, _mailbox_hash: MailboxHash) -> ResultFuture<()> {
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Err(MeliError::new("Unimplemented."))
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}
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fn tags(&self) -> Option<Arc<RwLock<BTreeMap<u64, String>>>> {
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None
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}
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fn as_any(&self) -> &dyn Any;
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fn as_any_mut(&mut self) -> &mut dyn Any {
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unimplemented!()
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}
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fn create_mailbox(
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&mut self,
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_path: String,
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) -> ResultFuture<(MailboxHash, HashMap<MailboxHash, Mailbox>)> {
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Err(MeliError::new("Unimplemented."))
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}
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fn delete_mailbox(
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&mut self,
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_mailbox_hash: MailboxHash,
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) -> ResultFuture<HashMap<MailboxHash, Mailbox>> {
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Err(MeliError::new("Unimplemented."))
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}
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fn set_mailbox_subscription(
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&mut self,
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_mailbox_hash: MailboxHash,
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_val: bool,
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) -> ResultFuture<()> {
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Err(MeliError::new("Unimplemented."))
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}
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fn rename_mailbox(
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&mut self,
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_mailbox_hash: MailboxHash,
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_new_path: String,
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) -> ResultFuture<Mailbox> {
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Err(MeliError::new("Unimplemented."))
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}
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fn set_mailbox_permissions(
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&mut self,
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_mailbox_hash: MailboxHash,
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_val: MailboxPermissions,
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) -> ResultFuture<()> {
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Err(MeliError::new("Unimplemented."))
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}
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fn search(
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&self,
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_query: crate::search::Query,
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_mailbox_hash: Option<MailboxHash>,
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) -> ResultFuture<SmallVec<[EnvelopeHash; 512]>> {
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Err(MeliError::new("Unimplemented."))
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}
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}
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/// A `BackendOp` manages common operations for the various mail backends. They only live for the
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/// duration of the operation. They are generated by the `operation` method of `Mailbackend` trait.
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///
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/// # Motivation
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///
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/// We need a way to do various operations on individual mails regardless of what backend they come
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/// from (eg local or imap).
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///
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/// # Creation
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/// ```ignore
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/// /* Create operation from Backend */
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///
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/// let op = backend.operation(message.hash(), mailbox.hash());
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/// ```
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///
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/// # Example
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/// ```ignore
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/// use melib::backends::{BackendOp};
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/// use melib::Result;
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/// use melib::{Envelope, Flag};
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///
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/// #[derive(Debug)]
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/// struct FooOp {}
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///
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/// impl BackendOp for FooOp {
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/// fn as_bytes(&mut self) -> Result<&[u8]> {
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/// unimplemented!()
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/// }
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/// fn fetch_flags(&self) -> Result<Flag> {
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/// unimplemented!()
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/// }
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/// }
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///
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/// let operation = Box::new(FooOp {});
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/// ```
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pub trait BackendOp: ::std::fmt::Debug + ::std::marker::Send {
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fn as_bytes(&mut self) -> ResultFuture<Vec<u8>>;
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fn copy_to(&self, _mailbox_hash: MailboxHash) -> ResultFuture<()> {
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Err(MeliError::new("Unimplemented."))
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}
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fn fetch_flags(&self) -> ResultFuture<Flag>;
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fn set_flag(&mut self, flag: Flag, value: bool) -> ResultFuture<()>;
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fn set_tag(&mut self, tag: String, value: bool) -> ResultFuture<()>;
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}
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/// Wrapper for BackendOps that are to be set read-only.
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///
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/// Warning: Backend implementations may still cause side-effects (for example IMAP can set the
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/// Seen flag when fetching an envelope)
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#[derive(Debug)]
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pub struct ReadOnlyOp {
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op: Box<dyn BackendOp>,
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}
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impl ReadOnlyOp {
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pub fn new(op: Box<dyn BackendOp>) -> Box<dyn BackendOp> {
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Box::new(ReadOnlyOp { op })
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}
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}
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impl BackendOp for ReadOnlyOp {
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fn as_bytes(&mut self) -> ResultFuture<Vec<u8>> {
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self.op.as_bytes()
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}
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fn fetch_flags(&self) -> ResultFuture<Flag> {
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self.op.fetch_flags()
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}
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fn set_flag(&mut self, _flag: Flag, _value: bool) -> ResultFuture<()> {
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Err(MeliError::new("read-only set."))
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}
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fn set_tag(&mut self, _tag: String, _value: bool) -> ResultFuture<()> {
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Err(MeliError::new("read-only set."))
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}
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}
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#[derive(Debug, Copy, Hash, Eq, Clone, Serialize, Deserialize, PartialEq)]
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pub enum SpecialUsageMailbox {
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Normal,
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Inbox,
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Archive,
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Drafts,
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Flagged,
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Junk,
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Sent,
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Trash,
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}
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impl std::fmt::Display for SpecialUsageMailbox {
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fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
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use SpecialUsageMailbox::*;
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write!(
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f,
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"{}",
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match self {
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Normal => "Normal",
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Inbox => "Inbox",
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Archive => "Archive",
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Drafts => "Drafts",
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Flagged => "Flagged",
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Junk => "Junk",
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Sent => "Sent",
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Trash => "Trash",
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}
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)
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}
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}
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impl Default for SpecialUsageMailbox {
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fn default() -> Self {
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SpecialUsageMailbox::Normal
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}
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}
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impl SpecialUsageMailbox {
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pub fn detect_usage(name: &str) -> Option<SpecialUsageMailbox> {
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if name.eq_ignore_ascii_case("inbox") {
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Some(SpecialUsageMailbox::Inbox)
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} else if name.eq_ignore_ascii_case("archive") {
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Some(SpecialUsageMailbox::Archive)
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} else if name.eq_ignore_ascii_case("drafts") {
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Some(SpecialUsageMailbox::Drafts)
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} else if name.eq_ignore_ascii_case("junk") || name.eq_ignore_ascii_case("spam") {
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Some(SpecialUsageMailbox::Junk)
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} else if name.eq_ignore_ascii_case("sent") {
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Some(SpecialUsageMailbox::Sent)
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} else if name.eq_ignore_ascii_case("trash") {
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Some(SpecialUsageMailbox::Trash)
|
|
} else {
|
|
Some(SpecialUsageMailbox::Normal)
|
|
}
|
|
}
|
|
}
|
|
|
|
pub trait BackendMailbox: Debug {
|
|
fn hash(&self) -> MailboxHash;
|
|
fn name(&self) -> &str;
|
|
/// Path of mailbox within the mailbox hierarchy, with `/` as separator.
|
|
fn path(&self) -> &str;
|
|
fn change_name(&mut self, new_name: &str);
|
|
fn clone(&self) -> Mailbox;
|
|
fn children(&self) -> &[MailboxHash];
|
|
fn parent(&self) -> Option<MailboxHash>;
|
|
fn is_subscribed(&self) -> bool;
|
|
fn set_is_subscribed(&mut self, new_val: bool) -> Result<()>;
|
|
fn set_special_usage(&mut self, new_val: SpecialUsageMailbox) -> Result<()>;
|
|
fn special_usage(&self) -> SpecialUsageMailbox;
|
|
fn permissions(&self) -> MailboxPermissions;
|
|
fn count(&self) -> Result<(usize, usize)>;
|
|
}
|
|
|
|
#[derive(Debug)]
|
|
struct DummyMailbox {
|
|
v: Vec<MailboxHash>,
|
|
}
|
|
|
|
impl BackendMailbox for DummyMailbox {
|
|
fn hash(&self) -> MailboxHash {
|
|
0
|
|
}
|
|
|
|
fn name(&self) -> &str {
|
|
""
|
|
}
|
|
|
|
fn path(&self) -> &str {
|
|
""
|
|
}
|
|
|
|
fn change_name(&mut self, _s: &str) {}
|
|
|
|
fn clone(&self) -> Mailbox {
|
|
mailbox_default()
|
|
}
|
|
|
|
fn special_usage(&self) -> SpecialUsageMailbox {
|
|
SpecialUsageMailbox::Normal
|
|
}
|
|
|
|
fn children(&self) -> &[MailboxHash] {
|
|
&self.v
|
|
}
|
|
|
|
fn parent(&self) -> Option<MailboxHash> {
|
|
None
|
|
}
|
|
|
|
fn permissions(&self) -> MailboxPermissions {
|
|
MailboxPermissions::default()
|
|
}
|
|
fn is_subscribed(&self) -> bool {
|
|
true
|
|
}
|
|
fn set_is_subscribed(&mut self, _new_val: bool) -> Result<()> {
|
|
Ok(())
|
|
}
|
|
fn set_special_usage(&mut self, _new_val: SpecialUsageMailbox) -> Result<()> {
|
|
Ok(())
|
|
}
|
|
fn count(&self) -> Result<(usize, usize)> {
|
|
Ok((0, 0))
|
|
}
|
|
}
|
|
|
|
pub fn mailbox_default() -> Mailbox {
|
|
Box::new(DummyMailbox {
|
|
v: Vec::with_capacity(0),
|
|
})
|
|
}
|
|
|
|
pub type AccountHash = u64;
|
|
pub type MailboxHash = u64;
|
|
pub type Mailbox = Box<dyn BackendMailbox + Send + Sync>;
|
|
|
|
impl Clone for Mailbox {
|
|
fn clone(&self) -> Self {
|
|
BackendMailbox::clone(self.deref())
|
|
}
|
|
}
|
|
|
|
impl Default for Mailbox {
|
|
fn default() -> Self {
|
|
mailbox_default()
|
|
}
|
|
}
|
|
|
|
#[derive(Debug, PartialEq, Eq, Hash, Clone, Copy)]
|
|
pub struct MailboxPermissions {
|
|
pub create_messages: bool,
|
|
pub remove_messages: bool,
|
|
pub set_flags: bool,
|
|
pub create_child: bool,
|
|
pub rename_messages: bool,
|
|
pub delete_messages: bool,
|
|
pub delete_mailbox: bool,
|
|
pub change_permissions: bool,
|
|
}
|
|
|
|
impl Default for MailboxPermissions {
|
|
fn default() -> Self {
|
|
MailboxPermissions {
|
|
create_messages: false,
|
|
remove_messages: false,
|
|
set_flags: false,
|
|
create_child: false,
|
|
rename_messages: false,
|
|
delete_messages: false,
|
|
delete_mailbox: true,
|
|
change_permissions: false,
|
|
}
|
|
}
|
|
}
|
|
|
|
impl std::fmt::Display for MailboxPermissions {
|
|
fn fmt(&self, fmt: &mut std::fmt::Formatter) -> std::fmt::Result {
|
|
write!(fmt, "{:#?}", self)
|
|
}
|
|
}
|