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/*
* meli - notmuch backend
*
* Copyright 2019 - 2020 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 crate::conf::AccountSettings;
use crate::email::{Envelope, EnvelopeHash, Flag};
use crate::error::{MeliError, Result};
use crate::shellexpand::ShellExpandTrait;
use crate::{backends::*, Collection};
use smallvec::SmallVec;
use std::collections::{
hash_map::{DefaultHasher, HashMap},
BTreeMap,
};
use std::error::Error;
use std::ffi::{CStr, CString, OsStr};
use std::hash::{Hash, Hasher};
use std::io::Read;
use std::os::unix::ffi::OsStrExt;
use std::path::{Path, PathBuf};
use std::sync::{Arc, Mutex, RwLock};
macro_rules! call {
($lib:expr, $func:ty) => {{
let func: libloading::Symbol<$func> = $lib.get(stringify!($func).as_bytes()).unwrap();
func
}};
}
macro_rules! try_call {
($lib:expr, $call:expr) => {{
let status = $call;
if status == _notmuch_status_NOTMUCH_STATUS_SUCCESS {
Ok(())
} else {
let c_str = call!($lib, notmuch_status_to_string)(status);
Err(NotmuchError(
CStr::from_ptr(c_str).to_string_lossy().into_owned(),
))
}
}};
}
pub mod bindings;
use bindings::*;
mod message;
pub use message::*;
mod tags;
pub use tags::*;
mod thread;
pub use thread::*;
#[derive(Debug)]
pub struct DbConnection {
pub lib: Arc<libloading::Library>,
pub inner: Arc<RwLock<*mut notmuch_database_t>>,
pub revision_uuid: Arc<RwLock<u64>>,
pub database_ph: std::marker::PhantomData<&'static mut notmuch_database_t>,
}
impl DbConnection {
pub fn get_revision_uuid(&self) -> u64 {
unsafe {
call!(self.lib, notmuch_database_get_revision)(
*self.inner.read().unwrap(),
std::ptr::null_mut(),
)
}
}
fn refresh(
&mut self,
mailboxes: Arc<RwLock<HashMap<MailboxHash, NotmuchMailbox>>>,
index: Arc<RwLock<HashMap<EnvelopeHash, CString>>>,
mailbox_index: Arc<RwLock<HashMap<EnvelopeHash, SmallVec<[MailboxHash; 16]>>>>,
tag_index: Arc<RwLock<BTreeMap<u64, String>>>,
account_hash: AccountHash,
event_consumer: BackendEventConsumer,
new_revision_uuid: u64,
) -> Result<()> {
use RefreshEventKind::*;
let query_str = format!(
"lastmod:{}..{}",
*self.revision_uuid.read().unwrap(),
new_revision_uuid
);
let query: Query = Query::new(&self, &query_str)?;
let iter = query.search()?;
let mailbox_index_lck = mailbox_index.write().unwrap();
let mailboxes_lck = mailboxes.read().unwrap();
for message in iter {
let env_hash = message.env_hash();
if let Some(mailbox_hashes) = mailbox_index_lck.get(&env_hash) {
let tags: (Flag, Vec<String>) = message.tags().collect_flags_and_tags();
let mut tag_lock = tag_index.write().unwrap();
for tag in tags.1.iter() {
let mut hasher = DefaultHasher::new();
hasher.write(tag.as_bytes());
let num = hasher.finish();
if !tag_lock.contains_key(&num) {
tag_lock.insert(num, tag.clone());
}
}
for &mailbox_hash in mailbox_hashes {
(event_consumer)(
account_hash,
BackendEvent::Refresh(RefreshEvent {
account_hash,
mailbox_hash,
kind: NewFlags(env_hash, tags.clone()),
}),
);
}
} else {
let message_id = message.msg_id_cstr().to_string_lossy().to_string();
let env = message.into_envelope(&index, &tag_index);
for (&mailbox_hash, m) in mailboxes_lck.iter() {
let query_str = format!("{} id:{}", m.query_str.as_str(), &message_id);
let query: Query = Query::new(self, &query_str)?;
if query.count().unwrap_or(0) > 0 {
let mut total_lck = m.total.lock().unwrap();
let mut unseen_lck = m.unseen.lock().unwrap();
*total_lck += 1;
if !env.is_seen() {
*unseen_lck += 1;
}
(event_consumer)(
account_hash,
BackendEvent::Refresh(RefreshEvent {
account_hash,
mailbox_hash,
kind: Create(Box::new(env.clone())),
}),
);
}
}
}
}
drop(query);
index.write().unwrap().retain(|&env_hash, msg_id| {
if Message::find_message(&self, &msg_id).is_err() {
if let Some(mailbox_hashes) = mailbox_index_lck.get(&env_hash) {
for &mailbox_hash in mailbox_hashes {
let m = &mailboxes_lck[&mailbox_hash];
let mut total_lck = m.total.lock().unwrap();
*total_lck = total_lck.saturating_sub(1);
(event_consumer)(
account_hash,
BackendEvent::Refresh(RefreshEvent {
account_hash,
mailbox_hash,
kind: Remove(env_hash),
}),
);
}
}
false
} else {
true
}
});
Ok(())
}
}
unsafe impl Send for DbConnection {}
unsafe impl Sync for DbConnection {}
#[derive(Debug)]
pub struct NotmuchError(String);
impl std::fmt::Display for NotmuchError {
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
std::fmt::Display::fmt(&self.0, f)
}
}
impl Error for NotmuchError {
fn source(&self) -> Option<&(dyn Error + 'static)> {
None
}
}
impl Drop for DbConnection {
fn drop(&mut self) {
let inner = self.inner.write().unwrap();
unsafe {
if let Err(err) = try_call!(self.lib, call!(self.lib, notmuch_database_close)(*inner)) {
debug!(err);
return;
}
if let Err(err) = try_call!(self.lib, call!(self.lib, notmuch_database_destroy)(*inner))
{
debug!(err);
}
}
}
}
#[derive(Debug)]
pub struct NotmuchDb {
lib: Arc<libloading::Library>,
revision_uuid: Arc<RwLock<u64>>,
mailboxes: Arc<RwLock<HashMap<MailboxHash, NotmuchMailbox>>>,
index: Arc<RwLock<HashMap<EnvelopeHash, CString>>>,
mailbox_index: Arc<RwLock<HashMap<EnvelopeHash, SmallVec<[MailboxHash; 16]>>>>,
collection: Collection,
path: PathBuf,
account_name: Arc<String>,
account_hash: AccountHash,
event_consumer: BackendEventConsumer,
save_messages_to: Option<PathBuf>,
}
unsafe impl Send for NotmuchDb {}
unsafe impl Sync for NotmuchDb {}
#[derive(Debug, Clone, Default)]
struct NotmuchMailbox {
hash: MailboxHash,
children: Vec<MailboxHash>,
parent: Option<MailboxHash>,
name: String,
path: String,
query_str: String,
usage: Arc<RwLock<SpecialUsageMailbox>>,
total: Arc<Mutex<usize>>,
unseen: Arc<Mutex<usize>>,
}
impl BackendMailbox for NotmuchMailbox {
fn hash(&self) -> MailboxHash {
self.hash
}
fn name(&self) -> &str {
self.name.as_str()
}
fn path(&self) -> &str {
self.path.as_str()
}
fn change_name(&mut self, _s: &str) {}
fn clone(&self) -> Mailbox {
Box::new(std::clone::Clone::clone(self))
}
fn children(&self) -> &[MailboxHash] {
&self.children
}
fn parent(&self) -> Option<MailboxHash> {
self.parent
}
fn special_usage(&self) -> SpecialUsageMailbox {
*self.usage.read().unwrap()
}
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<()> {
*self.usage.write()? = new_val;
Ok(())
}
fn count(&self) -> Result<(usize, usize)> {
Ok((*self.unseen.lock()?, *self.total.lock()?))
}
}
unsafe impl Send for NotmuchMailbox {}
unsafe impl Sync for NotmuchMailbox {}
impl NotmuchDb {
pub fn new(
s: &AccountSettings,
_is_subscribed: Box<dyn Fn(&str) -> bool>,
event_consumer: BackendEventConsumer,
) -> Result<Box<dyn MailBackend>> {
#[cfg(not(target_os = "macos"))]
let dlpath = "libnotmuch.so.5";
#[cfg(target_os = "macos")]
let dlpath = "libnotmuch.5.dylib";
let lib = Arc::new(libloading::Library::new(dlpath)?);
let path = Path::new(s.root_mailbox.as_str()).expand();
if !path.exists() {
return Err(MeliError::new(format!(
"\"root_mailbox\" {} for account {} is not a valid path.",
s.root_mailbox.as_str(),
s.name()
)));
}
let mut mailboxes = HashMap::default();
for (k, f) in s.mailboxes.iter() {
if let Some(query_str) = f.extra.get("query") {
let hash = {
let mut h = DefaultHasher::new();
k.hash(&mut h);
h.finish()
};
mailboxes.insert(
hash,
NotmuchMailbox {
hash,
name: k.to_string(),
path: k.to_string(),
children: vec![],
parent: None,
query_str: query_str.to_string(),
usage: Arc::new(RwLock::new(SpecialUsageMailbox::Normal)),
total: Arc::new(Mutex::new(0)),
unseen: Arc::new(Mutex::new(0)),
},
);
} else {
return Err(MeliError::new(format!(
"notmuch mailbox configuration entry \"{}\" should have a \"query\" value set.",
k
)));
}
}
let account_hash = {
let mut hasher = DefaultHasher::new();
hasher.write(s.name().as_bytes());
hasher.finish()
};
Ok(Box::new(NotmuchDb {
lib,
revision_uuid: Arc::new(RwLock::new(0)),
path,
index: Arc::new(RwLock::new(Default::default())),
mailbox_index: Arc::new(RwLock::new(Default::default())),
collection: Collection::default(),
mailboxes: Arc::new(RwLock::new(mailboxes)),
save_messages_to: None,
account_name: Arc::new(s.name().to_string()),
account_hash,
event_consumer,
}))
}
pub fn validate_config(s: &AccountSettings) -> Result<()> {
let path = Path::new(s.root_mailbox.as_str()).expand();
if !path.exists() {
return Err(MeliError::new(format!(
"\"root_mailbox\" {} for account {} is not a valid path.",
s.root_mailbox.as_str(),
s.name()
)));
}
for (k, f) in s.mailboxes.iter() {
if f.extra.get("query").is_none() {
return Err(MeliError::new(format!(
"notmuch mailbox configuration entry \"{}\" should have a \"query\" value set.",
k
)));
}
}
Ok(())
}
fn new_connection(
path: &Path,
revision_uuid: Arc<RwLock<u64>>,
lib: Arc<libloading::Library>,
write: bool,
) -> Result<DbConnection> {
let path_c = std::ffi::CString::new(path.to_str().unwrap()).unwrap();
let path_ptr = path_c.as_ptr();
let mut database: *mut notmuch_database_t = std::ptr::null_mut();
let status = unsafe {
call!(lib, notmuch_database_open)(
path_ptr,
if write {
notmuch_database_mode_t_NOTMUCH_DATABASE_MODE_READ_WRITE
} else {
notmuch_database_mode_t_NOTMUCH_DATABASE_MODE_READ_ONLY
},
&mut database as *mut _,
)
};
if status != 0 {
return Err(MeliError::new(format!(
"Could not open notmuch database at path {}. notmuch_database_open returned {}.",
path.display(),
status
)));
}
assert!(!database.is_null());
let ret = DbConnection {
lib,
revision_uuid,
inner: Arc::new(RwLock::new(database)),
database_ph: std::marker::PhantomData,
};
if *ret.revision_uuid.read().unwrap() == 0 {
let new = ret.get_revision_uuid();
*ret.revision_uuid.write().unwrap() = new;
}
Ok(ret)
}
}
impl MailBackend for NotmuchDb {
fn capabilities(&self) -> MailBackendCapabilities {
const CAPABILITIES: MailBackendCapabilities = MailBackendCapabilities {
is_async: false,
is_remote: false,
supports_search: true,
extensions: None,
supports_tags: true,
supports_submission: false,
};
CAPABILITIES
}
fn is_online(&self) -> ResultFuture<()> {
Ok(Box::pin(async { Ok(()) }))
}
fn fetch(
&mut self,
mailbox_hash: MailboxHash,
) -> Result<Pin<Box<dyn Stream<Item = Result<Vec<Envelope>>> + Send + 'static>>> {
struct FetchState {
mailbox_hash: MailboxHash,
database: Arc<DbConnection>,
index: Arc<RwLock<HashMap<EnvelopeHash, CString>>>,
mailbox_index: Arc<RwLock<HashMap<EnvelopeHash, SmallVec<[MailboxHash; 16]>>>>,
mailboxes: Arc<RwLock<HashMap<u64, NotmuchMailbox>>>,
tag_index: Arc<RwLock<BTreeMap<u64, String>>>,
iter: std::vec::IntoIter<CString>,
}
impl FetchState {
async fn fetch(&mut self) -> Result<Option<Vec<Envelope>>> {
let mut unseen_count = 0;
let chunk_size = 250;
let mut mailbox_index_lck = self.mailbox_index.write().unwrap();
let mut ret: Vec<Envelope> = Vec::with_capacity(chunk_size);
let mut done: bool = false;
for _ in 0..chunk_size {
if let Some(message_id) = self.iter.next() {
let message =
if let Ok(v) = Message::find_message(&self.database, &message_id) {
v
} else {
continue;
};
let env = message.into_envelope(&self.index, &self.tag_index);
mailbox_index_lck
.entry(env.hash())
.or_default()
.push(self.mailbox_hash);
if !env.is_seen() {
unseen_count += 1;
}
ret.push(env);
} else {
done = true;
break;
}
}
{
let mailboxes_lck = self.mailboxes.read().unwrap();
let mailbox = mailboxes_lck.get(&self.mailbox_hash).unwrap();
let mut unseen_lck = mailbox.unseen.lock().unwrap();
*unseen_lck += unseen_count;
}
if done && ret.is_empty() {
Ok(None)
} else {
Ok(Some(ret))
}
}
}
let database = Arc::new(NotmuchDb::new_connection(
self.path.as_path(),
self.revision_uuid.clone(),
self.lib.clone(),
false,
)?);
let index = self.index.clone();
let mailbox_index = self.mailbox_index.clone();
let tag_index = self.collection.tag_index.clone();
let mailboxes = self.mailboxes.clone();
let v: Vec<CString>;
{
let mailboxes_lck = mailboxes.read().unwrap();
let mailbox = mailboxes_lck.get(&mailbox_hash).unwrap();
let query: Query = Query::new(&database, mailbox.query_str.as_str())?;
{
let mut total_lck = mailbox.total.lock().unwrap();
let mut unseen_lck = mailbox.unseen.lock().unwrap();
*total_lck = query.count()? as usize;
*unseen_lck = 0;
}
let mut index_lck = index.write().unwrap();
v = query
.search()?
.into_iter()
.map(|m| {
index_lck.insert(m.env_hash(), m.msg_id_cstr().into());
m.msg_id_cstr().into()
})
.collect();
}
let mut state = FetchState {
mailbox_hash,
mailboxes,
database,
index,
mailbox_index,
tag_index,
iter: v.into_iter(),
};
Ok(Box::pin(async_stream::try_stream! {
while let Some(res) = state.fetch().await.map_err(|err| { debug!("fetch err {:?}", &err); err})? {
yield res;
}
}))
}
fn refresh(&mut self, _mailbox_hash: MailboxHash) -> ResultFuture<()> {
let account_hash = self.account_hash;
let mut database = NotmuchDb::new_connection(
self.path.as_path(),
self.revision_uuid.clone(),
self.lib.clone(),
false,
)?;
let mailboxes = self.mailboxes.clone();
let index = self.index.clone();
let mailbox_index = self.mailbox_index.clone();
let tag_index = self.collection.tag_index.clone();
let event_consumer = self.event_consumer.clone();
Ok(Box::pin(async move {
let new_revision_uuid = database.get_revision_uuid();
if new_revision_uuid > *database.revision_uuid.read().unwrap() {
database.refresh(
mailboxes,
index,
mailbox_index,
tag_index,
account_hash,
event_consumer,
new_revision_uuid,
)?;
*database.revision_uuid.write().unwrap() = new_revision_uuid;
}
Ok(())
}))
}
fn watch(&self) -> ResultFuture<()> {
extern crate notify;
use notify::{watcher, RecursiveMode, Watcher};
let account_hash = self.account_hash;
let collection = self.collection.clone();
let lib = self.lib.clone();
let path = self.path.clone();
let revision_uuid = self.revision_uuid.clone();
let mailboxes = self.mailboxes.clone();
let index = self.index.clone();
let mailbox_index = self.mailbox_index.clone();
let event_consumer = self.event_consumer.clone();
let (tx, rx) = std::sync::mpsc::channel();
let mut watcher = watcher(tx, std::time::Duration::from_secs(2)).unwrap();
watcher.watch(&self.path, RecursiveMode::Recursive).unwrap();
Ok(Box::pin(async move {
let _watcher = watcher;
let rx = rx;
loop {
let _ = rx.recv().map_err(|err| err.to_string())?;
{
let mut database = NotmuchDb::new_connection(
path.as_path(),
revision_uuid.clone(),
lib.clone(),
false,
)?;
let new_revision_uuid = database.get_revision_uuid();
if new_revision_uuid > *database.revision_uuid.read().unwrap() {
database.refresh(
mailboxes.clone(),
index.clone(),
mailbox_index.clone(),
collection.tag_index.clone(),
account_hash.clone(),
event_consumer.clone(),
new_revision_uuid,
)?;
*revision_uuid.write().unwrap() = new_revision_uuid;
}
}
}
}))
}
fn mailboxes(&self) -> ResultFuture<HashMap<MailboxHash, Mailbox>> {
let ret = Ok(self
.mailboxes
.read()
.unwrap()
.iter()
.map(|(k, f)| (*k, BackendMailbox::clone(f)))
.collect());
Ok(Box::pin(async { ret }))
}
fn operation(&self, hash: EnvelopeHash) -> Result<Box<dyn BackendOp>> {
Ok(Box::new(NotmuchOp {
database: Arc::new(Self::new_connection(
self.path.as_path(),
self.revision_uuid.clone(),
self.lib.clone(),
true,
)?),
lib: self.lib.clone(),
hash,
index: self.index.clone(),
bytes: None,
collection: self.collection.clone(),
}))
}
fn save(
&self,
bytes: Vec<u8>,
_mailbox_hash: MailboxHash,
flags: Option<Flag>,
) -> ResultFuture<()> {
// FIXME call notmuch_database_index_file ?
let path = self
.save_messages_to
.as_ref()
.unwrap_or(&self.path)
.to_path_buf();
MaildirType::save_to_mailbox(path, bytes, flags)?;
Ok(Box::pin(async { Ok(()) }))
}
fn copy_messages(
&mut self,
_env_hashes: EnvelopeHashBatch,
_source_mailbox_hash: MailboxHash,
_destination_mailbox_hash: MailboxHash,
_move_: bool,
) -> ResultFuture<()> {
Err(MeliError::new("Unimplemented."))
}
fn set_flags(
&mut self,
env_hashes: EnvelopeHashBatch,
_mailbox_hash: MailboxHash,
flags: SmallVec<[(std::result::Result<Flag, String>, bool); 8]>,
) -> ResultFuture<()> {
let database = Self::new_connection(
self.path.as_path(),
self.revision_uuid.clone(),
self.lib.clone(),
true,
)?;
let collection = self.collection.clone();
let index = self.index.clone();
Ok(Box::pin(async move {
let mut index_lck = index.write().unwrap();
for env_hash in env_hashes.iter() {
debug!(&env_hash);
let message = match Message::find_message(&database, &index_lck[&env_hash]) {
Ok(v) => v,
Err(err) => {
debug!("not found {}", err);
continue;
}
};
let tags = debug!(message.tags().collect::<Vec<&CStr>>());
//flags.set(f, value);
macro_rules! cstr {
($l:literal) => {
&CStr::from_bytes_with_nul_unchecked($l)
};
}
macro_rules! add_tag {
($l:literal) => {{
add_tag!(unsafe { cstr!($l) })
}};
($l:expr) => {{
let l = $l;
if tags.contains(l) {
continue;
}
message.add_tag(l)?;
}};
}
macro_rules! remove_tag {
($l:literal) => {{
remove_tag!(unsafe { cstr!($l) })
}};
($l:expr) => {{
let l = $l;
if !tags.contains(l) {
continue;
}
message.remove_tag(l)?;
}};
}
for (f, v) in flags.iter() {
let value = *v;
debug!(&f);
debug!(&value);
match f {
Ok(Flag::DRAFT) if value => add_tag!(b"draft\0"),
Ok(Flag::DRAFT) => remove_tag!(b"draft\0"),
Ok(Flag::FLAGGED) if value => add_tag!(b"flagged\0"),
Ok(Flag::FLAGGED) => remove_tag!(b"flagged\0"),
Ok(Flag::PASSED) if value => add_tag!(b"passed\0"),
Ok(Flag::PASSED) => remove_tag!(b"passed\0"),
Ok(Flag::REPLIED) if value => add_tag!(b"replied\0"),
Ok(Flag::REPLIED) => remove_tag!(b"replied\0"),
Ok(Flag::SEEN) if value => remove_tag!(b"unread\0"),
Ok(Flag::SEEN) => add_tag!(b"unread\0"),
Ok(Flag::TRASHED) if value => add_tag!(b"trashed\0"),
Ok(Flag::TRASHED) => remove_tag!(b"trashed\0"),
Ok(_) => debug!("flags is {:?} value = {}", f, value),
Err(tag) if value => {
let c_tag = CString::new(tag.as_str()).unwrap();
add_tag!(&c_tag.as_ref());
}
Err(tag) => {
let c_tag = CString::new(tag.as_str()).unwrap();
add_tag!(&c_tag.as_ref());
}
}
}
/* Update message filesystem path. */
message.tags_to_maildir_flags()?;
let msg_id = message.msg_id_cstr();
if let Some(p) = index_lck.get_mut(&env_hash) {
*p = msg_id.into();
}
}
for (f, v) in flags.iter() {
if let (Err(tag), true) = (f, v) {
let hash = tag_hash!(tag);
collection
.tag_index
.write()
.unwrap()
.insert(hash, tag.to_string());
}
}
Ok(())
}))
}
fn delete_messages(
&mut self,
_env_hashes: EnvelopeHashBatch,
_mailbox_hash: MailboxHash,
) -> ResultFuture<()> {
Err(MeliError::new("Unimplemented."))
}
fn search(
&self,
melib_query: crate::search::Query,
mailbox_hash: Option<MailboxHash>,
) -> ResultFuture<SmallVec<[EnvelopeHash; 512]>> {
let database = NotmuchDb::new_connection(
self.path.as_path(),
self.revision_uuid.clone(),
self.lib.clone(),
false,
)?;
let mailboxes = self.mailboxes.clone();
Ok(Box::pin(async move {
let mut ret = SmallVec::new();
let mut query_s = if let Some(mailbox_hash) = mailbox_hash {
if let Some(m) = mailboxes.read().unwrap().get(&mailbox_hash) {
let mut s = m.query_str.clone();
s.push(' ');
s
} else {
return Err(MeliError::new("Mailbox with hash {} not found!")
.set_kind(crate::error::ErrorKind::Bug));
}
} else {
String::new()
};
melib_query.query_to_string(&mut query_s);
let query: Query = Query::new(&database, &query_s)?;
let iter = query.search()?;
for message in iter {
ret.push(message.env_hash());
}
Ok(ret)
}))
}
fn collection(&self) -> Collection {
self.collection.clone()
}
fn as_any(&self) -> &dyn Any {
self
}
fn as_any_mut(&mut self) -> &mut dyn Any {
self
}
}
#[derive(Debug)]
struct NotmuchOp {
hash: EnvelopeHash,
index: Arc<RwLock<HashMap<EnvelopeHash, CString>>>,
collection: Collection,
database: Arc<DbConnection>,
bytes: Option<Vec<u8>>,
lib: Arc<libloading::Library>,
}
impl BackendOp for NotmuchOp {
fn as_bytes(&mut self) -> ResultFuture<Vec<u8>> {
let index_lck = self.index.write().unwrap();
let message = Message::find_message(&self.database, &index_lck[&self.hash])?;
let mut f = std::fs::File::open(message.get_filename())?;
let mut response = Vec::new();
f.read_to_end(&mut response)?;
self.bytes = Some(response);
let ret = Ok(self.bytes.as_ref().unwrap().to_vec());
Ok(Box::pin(async move { ret }))
}
fn fetch_flags(&self) -> ResultFuture<Flag> {
let index_lck = self.index.write().unwrap();
let message = Message::find_message(&self.database, &index_lck[&self.hash])?;
let (flags, _tags) = message.tags().collect_flags_and_tags();
Ok(Box::pin(async move { Ok(flags) }))
}
}
pub struct Query<'s> {
lib: Arc<libloading::Library>,
ptr: *mut notmuch_query_t,
query_str: &'s str,
}
impl<'s> Query<'s> {
fn new(database: &DbConnection, query_str: &'s str) -> Result<Self> {
let lib: Arc<libloading::Library> = database.lib.clone();
let query_cstr = std::ffi::CString::new(query_str)?;
let query: *mut notmuch_query_t = unsafe {
call!(lib, notmuch_query_create)(*database.inner.read().unwrap(), query_cstr.as_ptr())
};
if query.is_null() {
return Err(MeliError::new("Could not create query. Out of memory?"));
}
Ok(Query {
lib,
ptr: query,
query_str,
})
}
fn count(&self) -> Result<u32> {
let mut count = 0_u32;
unsafe {
try_call!(
self.lib,
call!(self.lib, notmuch_query_count_messages)(self.ptr, &mut count as *mut _)
)
.map_err(|err| err.0)?;
}
Ok(count)
}
fn search(&'s self) -> Result<MessageIterator<'s>> {
let mut messages: *mut notmuch_messages_t = std::ptr::null_mut();
let status = unsafe {
call!(self.lib, notmuch_query_search_messages)(self.ptr, &mut messages as *mut _)
};
if status != 0 {
return Err(MeliError::new(format!(
"Search for {} returned {}",
self.query_str, status,
)));
}
assert!(!messages.is_null());
Ok(MessageIterator {
messages,
lib: self.lib.clone(),
_ph: std::marker::PhantomData,
is_from_thread: false,
})
}
}
impl Drop for Query<'_> {
fn drop(&mut self) {
unsafe {
call!(self.lib, notmuch_query_destroy)(self.ptr);
}
}
}
pub trait MelibQueryToNotmuchQuery {
fn query_to_string(&self, ret: &mut String);
}
impl MelibQueryToNotmuchQuery for crate::search::Query {
fn query_to_string(&self, ret: &mut String) {
use crate::search::Query::*;
match self {
Before(timestamp) => {
ret.push_str("date:..@");
ret.push_str(&timestamp.to_string());
}
After(timestamp) => {
ret.push_str("date:@");
ret.push_str(&timestamp.to_string());
ret.push_str("..");
}
Between(a, b) => {
ret.push_str("date:@");
ret.push_str(&a.to_string());
ret.push_str("..@");
ret.push_str(&b.to_string());
}
On(timestamp) => {
ret.push_str("date:@");
ret.push_str(&timestamp.to_string());
}
/* * * * */
From(s) => {
ret.push_str("from:\"");
for c in s.chars() {
if c == '"' {
ret.push_str("\\\"");
} else {
ret.push(c);
}
}
ret.push_str("\"");
}
To(s) | Cc(s) | Bcc(s) => {
ret.push_str("to:\"");
for c in s.chars() {
if c == '"' {
ret.push_str("\\\"");
} else {
ret.push(c);
}
}
ret.push_str("\"");
}
InReplyTo(_s) | References(_s) | AllAddresses(_s) => {}
/* * * * */
Body(s) => {
ret.push_str("body:\"");
for c in s.chars() {
if c == '"' {
ret.push_str("\\\"");
} else {
ret.push(c);
}
}
ret.push_str("\"");
}
Subject(s) => {
ret.push_str("subject:\"");
for c in s.chars() {
if c == '"' {
ret.push_str("\\\"");
} else {
ret.push(c);
}
}
ret.push_str("\"");
}
AllText(s) => {
ret.push_str("\"");
for c in s.chars() {
if c == '"' {
ret.push_str("\\\"");
} else {
ret.push(c);
}
}
ret.push_str("\"");
}
/* * * * */
Flags(v) => {
for f in v {
ret.push_str("tag:\"");
for c in f.chars() {
if c == '"' {
ret.push_str("\\\"");
} else {
ret.push(c);
}
}
ret.push_str("\" ");
}
if !v.is_empty() {
ret.pop();
}
}
HasAttachment => {
ret.push_str("tag:attachment");
}
And(q1, q2) => {
ret.push('(');
q1.query_to_string(ret);
ret.push_str(") AND (");
q2.query_to_string(ret);
ret.push(')');
}
Or(q1, q2) => {
ret.push('(');
q1.query_to_string(ret);
ret.push_str(") OR (");
q2.query_to_string(ret);
ret.push(')');
}
Not(q) => {
ret.push_str("(NOT (");
q.query_to_string(ret);
ret.push_str("))");
}
}
}
}