Implement mailbox renaming

This commit is contained in:
Alex 2022-07-12 15:23:30 +02:00
parent ad15595f0f
commit 7b888ed8cf
Signed by: lx
GPG key ID: 0E496D15096376BE

View file

@ -65,53 +65,102 @@ impl User {
/// Lists user's available mailboxes
pub async fn list_mailboxes(&self) -> Result<Vec<String>> {
let (list, _ct) = self.load_mailbox_list().await?;
Ok(list.into_iter().map(|(k, _)| k).collect())
Ok(list.existing_mailbox_names())
}
/// Opens an existing mailbox given its IMAP name.
pub async fn open_mailbox(&self, name: &str) -> Result<Option<Arc<Mailbox>>> {
let (mut list, ct) = self.load_mailbox_list().await?;
eprintln!("List of mailboxes: {:?}", list);
match list.get_mut(name) {
Some(MailboxListEntry {
id_lww: (_, Some(mbid)),
uidvalidity,
}) => {
let mb_opt = self.open_mailbox_by_id(*mbid, *uidvalidity).await?;
eprintln!("List of mailboxes: {:?}", &list.0);
if let Some((uidvalidity, Some(mbid))) = list.get_mailbox(name) {
let mb_opt = self.open_mailbox_by_id(mbid, uidvalidity).await?;
if let Some(mb) = &mb_opt {
let mb_uidvalidity = mb.current_uid_index().await.uidvalidity;
if mb_uidvalidity > *uidvalidity {
*uidvalidity = mb_uidvalidity;
if mb_uidvalidity > uidvalidity {
list.update_uidvalidity(name, mb_uidvalidity);
self.save_mailbox_list(&list, ct).await?;
}
}
Ok(mb_opt)
}
_ => bail!("Mailbox does not exist: {}", name),
} else {
bail!("Mailbox does not exist: {}", name);
}
}
/// Creates a new mailbox in the user's IMAP namespace.
pub async fn create_mailbox(&self, name: &str) -> Result<()> {
if name.ends_with(MAILBOX_HIERARCHY_DELIMITER) {
bail!("Invalid mailbox name: {}", name);
}
let (mut list, ct) = self.load_mailbox_list().await?;
match self.mblist_create_mailbox(&mut list, ct, name).await? {
CreatedMailbox::Created(_, _) => Ok(()),
match list.create_mailbox(name) {
CreatedMailbox::Created(_, _) => {
self.save_mailbox_list(&list, ct).await?;
Ok(())
}
CreatedMailbox::Existed(_, _) => Err(anyhow!("Mailbox {} already exists", name)),
}
}
/// Deletes a mailbox in the user's IMAP namespace.
pub async fn delete_mailbox(&self, _name: &str) -> Result<()> {
bail!("Deleting mailboxes not implemented yet")
pub async fn delete_mailbox(&self, name: &str) -> Result<()> {
if name == INBOX {
bail!("Cannot delete INBOX");
}
let (mut list, ct) = self.load_mailbox_list().await?;
if list.has_mailbox(name) {
// TODO: actually delete mailbox contents
list.set_mailbox(name, None);
self.save_mailbox_list(&list, ct).await?;
Ok(())
} else {
bail!("Mailbox {} does not exist", name);
}
}
/// Renames a mailbox in the user's IMAP namespace.
pub async fn rename_mailbox(&self, old_name: &str, new_name: &str) -> Result<()> {
if old_name == INBOX {
bail!("Renaming INBOX not implemented yet")
} else {
bail!("Renaming not implemented yet")
let (mut list, ct) = self.load_mailbox_list().await?;
if old_name.ends_with(MAILBOX_HIERARCHY_DELIMITER) {
bail!("Invalid mailbox name: {}", old_name);
}
if new_name.ends_with(MAILBOX_HIERARCHY_DELIMITER) {
bail!("Invalid mailbox name: {}", new_name);
}
if old_name == INBOX {
list.rename_mailbox(old_name, new_name)?;
if !self.ensure_inbox_exists(&mut list, &ct).await? {
self.save_mailbox_list(&list, ct).await?;
}
} else {
let names = list.existing_mailbox_names();
let old_name_w_delim = format!("{}{}", old_name, MAILBOX_HIERARCHY_DELIMITER);
let new_name_w_delim = format!("{}{}", new_name, MAILBOX_HIERARCHY_DELIMITER);
if names
.iter()
.any(|x| x == new_name || x.starts_with(&new_name_w_delim))
{
bail!("Mailbox {} already exists", new_name);
}
for name in names.iter() {
if name == old_name {
list.rename_mailbox(name, new_name)?;
} else if let Some(tail) = name.strip_prefix(&old_name_w_delim) {
let nnew = format!("{}{}", new_name_w_delim, tail);
list.rename_mailbox(name, &nnew)?;
}
}
self.save_mailbox_list(&list, ct).await?;
}
Ok(())
}
// ---- Internal user & mailbox management ----
@ -169,15 +218,15 @@ impl User {
async fn load_mailbox_list(&self) -> Result<(MailboxList, Option<CausalityToken>)> {
let (mut list, ct) = match self.k2v.read_item(MAILBOX_LIST_PK, MAILBOX_LIST_SK).await {
Err(k2v_client::Error::NotFound) => (BTreeMap::new(), None),
Err(k2v_client::Error::NotFound) => (MailboxList::new(), None),
Err(e) => return Err(e.into()),
Ok(cv) => {
let mut list = BTreeMap::new();
let mut list = MailboxList::new();
for v in cv.value {
if let K2vValue::Value(vbytes) = v {
let list2 =
open_deserialize::<MailboxList>(&vbytes, &self.creds.keys.master)?;
list = merge_mailbox_lists(list, list2);
list.merge(list2);
}
}
(list, Some(cv.causality))
@ -193,22 +242,29 @@ impl User {
&self,
list: &mut MailboxList,
ct: &Option<CausalityToken>,
) -> Result<()> {
) -> Result<bool> {
// If INBOX doesn't exist, create a new mailbox with that name
// and save new mailbox list.
// Also, ensure that the mpsc::watch that keeps track of the
// inbox id is up-to-date.
let (inbox_id, inbox_uidvalidity) =
match self.mblist_create_mailbox(list, ct.clone(), INBOX).await? {
CreatedMailbox::Created(i, v) => (i, v),
CreatedMailbox::Existed(i, v) => (i, v),
let saved;
let (inbox_id, inbox_uidvalidity) = match list.create_mailbox(INBOX) {
CreatedMailbox::Created(i, v) => {
self.save_mailbox_list(&list, ct.clone()).await?;
saved = true;
(i, v)
}
CreatedMailbox::Existed(i, v) => {
saved = false;
(i, v)
}
};
let inbox_id = Some((inbox_id, inbox_uidvalidity));
if *self.tx_inbox_id.borrow() != inbox_id {
self.tx_inbox_id.send(inbox_id).unwrap();
}
Ok(())
Ok(saved)
}
async fn save_mailbox_list(
@ -222,49 +278,12 @@ impl User {
.await?;
Ok(())
}
async fn mblist_create_mailbox(
&self,
list: &mut MailboxList,
ct: Option<CausalityToken>,
name: &str,
) -> Result<CreatedMailbox> {
match list.get_mut(name) {
None => {
let (id, uidvalidity) = (gen_ident(), ImapUidvalidity::new(1).unwrap());
list.insert(
name.into(),
MailboxListEntry {
id_lww: (now_msec(), Some(id)),
uidvalidity,
},
);
self.save_mailbox_list(&list, ct).await?;
Ok(CreatedMailbox::Created(id, uidvalidity))
}
Some(MailboxListEntry {
id_lww: id_lww @ (_, None),
uidvalidity,
}) => {
let id = gen_ident();
id_lww.0 = std::cmp::max(id_lww.0 + 1, now_msec());
id_lww.1 = Some(id);
*uidvalidity = ImapUidvalidity::new(uidvalidity.get() + 1).unwrap();
let uidvalidity = *uidvalidity;
self.save_mailbox_list(list, ct).await?;
Ok(CreatedMailbox::Created(id, uidvalidity))
}
Some(MailboxListEntry {
id_lww: (_, Some(id)),
uidvalidity,
}) => Ok(CreatedMailbox::Existed(*id, *uidvalidity)),
}
}
}
// ---- User's mailbox list (serialized in K2V) ----
type MailboxList = BTreeMap<String, MailboxListEntry>;
#[derive(Serialize, Deserialize)]
struct MailboxList(BTreeMap<String, MailboxListEntry>);
#[derive(Serialize, Deserialize, Clone, Copy, Debug)]
struct MailboxListEntry {
@ -284,15 +303,142 @@ impl MailboxListEntry {
}
}
fn merge_mailbox_lists(mut list1: MailboxList, list2: MailboxList) -> MailboxList {
for (k, v) in list2.into_iter() {
if let Some(e) = list1.get_mut(&k) {
impl MailboxList {
fn new() -> Self {
Self(BTreeMap::new())
}
fn merge(&mut self, list2: Self) {
for (k, v) in list2.0.into_iter() {
if let Some(e) = self.0.get_mut(&k) {
e.merge(&v);
} else {
list1.insert(k, v);
self.0.insert(k, v);
}
}
}
fn existing_mailbox_names(&self) -> Vec<String> {
self.0
.iter()
.filter(|(_, v)| v.id_lww.1.is_some())
.map(|(k, _)| k.to_string())
.collect()
}
fn has_mailbox(&self, name: &str) -> bool {
match self.0.get(name) {
Some(MailboxListEntry {
id_lww: (_, Some(_)),
..
}) => true,
_ => false,
}
}
fn get_mailbox(&self, name: &str) -> Option<(ImapUidvalidity, Option<UniqueIdent>)> {
match self.0.get(name) {
None => None,
Some(MailboxListEntry {
id_lww: (_, mailbox_id),
uidvalidity,
}) => Some((*uidvalidity, *mailbox_id)),
}
}
/// Ensures mailbox `name` maps to id `id`.
/// If it already mapped to that, returns None.
/// If a change had to be done, returns Some(new uidvalidity in mailbox).
fn set_mailbox(&mut self, name: &str, id: Option<UniqueIdent>) -> Option<ImapUidvalidity> {
let (ts, id, uidvalidity) = match self.0.get_mut(name) {
None => {
if id.is_none() {
return None;
} else {
(now_msec(), id, ImapUidvalidity::new(1).unwrap())
}
}
Some(MailboxListEntry {
id_lww,
uidvalidity,
}) => {
if id_lww.1 == id {
return None;
} else {
(
std::cmp::max(id_lww.0 + 1, now_msec()),
id,
ImapUidvalidity::new(uidvalidity.get() + 1).unwrap(),
)
}
}
};
self.0.insert(
name.into(),
MailboxListEntry {
id_lww: (ts, id),
uidvalidity,
},
);
Some(uidvalidity)
}
fn update_uidvalidity(&mut self, name: &str, new_uidvalidity: ImapUidvalidity) {
match self.0.get_mut(name) {
None => {
self.0.insert(
name.into(),
MailboxListEntry {
id_lww: (now_msec(), None),
uidvalidity: new_uidvalidity,
},
);
}
Some(MailboxListEntry { uidvalidity, .. }) => {
*uidvalidity = std::cmp::max(*uidvalidity, new_uidvalidity);
}
}
}
fn create_mailbox(&mut self, name: &str) -> CreatedMailbox {
if let Some(MailboxListEntry {
id_lww: (_, Some(id)),
uidvalidity,
}) = self.0.get(name)
{
return CreatedMailbox::Existed(*id, *uidvalidity);
}
let id = gen_ident();
let uidvalidity = self.set_mailbox(name, Some(id)).unwrap();
CreatedMailbox::Created(id, uidvalidity)
}
fn rename_mailbox(&mut self, old_name: &str, new_name: &str) -> Result<()> {
if let Some((uidvalidity, Some(mbid))) = self.get_mailbox(old_name) {
if self.has_mailbox(new_name) {
bail!(
"Cannot rename {} into {}: {} already exists",
old_name,
new_name,
new_name
);
}
self.set_mailbox(old_name, None);
self.set_mailbox(new_name, Some(mbid));
self.update_uidvalidity(new_name, uidvalidity);
Ok(())
} else {
bail!(
"Cannot rename {} into {}: {} doesn't exist",
old_name,
new_name,
old_name
);
}
}
list1
}
enum CreatedMailbox {