diff options
Diffstat (limited to 'src/mail')
| -rw-r--r-- | src/mail/mailbox.rs | 7 | ||||
| -rw-r--r-- | src/mail/user.rs | 153 |
2 files changed, 130 insertions, 30 deletions
diff --git a/src/mail/mailbox.rs b/src/mail/mailbox.rs index dd0d5da..643a869 100644 --- a/src/mail/mailbox.rs +++ b/src/mail/mailbox.rs @@ -22,13 +22,18 @@ pub struct Mailbox { } impl Mailbox { - pub(super) async fn open(creds: &Credentials, id: UniqueIdent) -> Result<Self> { + pub(super) async fn open(creds: &Credentials, id: UniqueIdent, min_uidvalidity: ImapUidvalidity) -> Result<Self> { let index_path = format!("index/{}", id); let mail_path = format!("mail/{}", id); let mut uid_index = Bayou::<UidIndex>::new(creds, index_path)?; uid_index.sync().await?; + let uidvalidity = uid_index.state().uidvalidity; + if uidvalidity < min_uidvalidity { + uid_index.push(uid_index.state().op_bump_uidvalidity(min_uidvalidity.get() - uidvalidity.get())).await?; + } + let mbox = RwLock::new(MailboxInternal { id, bucket: creds.bucket().to_string(), diff --git a/src/mail/user.rs b/src/mail/user.rs index f1d0477..bccb9ed 100644 --- a/src/mail/user.rs +++ b/src/mail/user.rs @@ -1,48 +1,81 @@ -use std::collections::HashMap; +use std::collections::{HashMap, BTreeMap}; use std::sync::{Arc, Weak}; -use anyhow::Result; +use anyhow::{Result, bail}; use lazy_static::lazy_static; +use serde::{Serialize, Deserialize}; +use k2v_client::{K2vClient, CausalityToken, K2vValue}; -use k2v_client::K2vClient; -use rusoto_s3::S3Client; - +use crate::cryptoblob::{seal_serialize, open_deserialize}; use crate::login::{Credentials, StorageCredentials}; use crate::mail::mailbox::Mailbox; -use crate::mail::unique_ident::UniqueIdent; +use crate::mail::unique_ident::{UniqueIdent, gen_ident}; +use crate::mail::uidindex::ImapUidvalidity; +use crate::time::now_msec; + +const MAILBOX_HIERARCHY_DELIMITER: &str = "/"; + +/// INBOX is the only mailbox that must always exist. +/// It is created automatically when the account is created. +/// IMAP allows the user to rename INBOX to something else, +/// in this case all messages from INBOX are moved to a mailbox +/// with the new name and the INBOX mailbox still exists and is empty. +/// In our implementation, we indeed move the underlying mailbox +/// to the new name (i.e. the new name has the same id as the previous +/// INBOX), and we create a new empty mailbox for INBOX. +const INBOX: &str = "INBOX"; pub struct User { pub username: String, pub creds: Credentials, - pub s3_client: S3Client, - pub k2v_client: K2vClient, + pub k2v: K2vClient, } impl User { pub fn new(username: String, creds: Credentials) -> Result<Self> { - let s3_client = creds.s3_client()?; - let k2v_client = creds.k2v_client()?; + let k2v = creds.k2v_client()?; Ok(Self { username, creds, - s3_client, - k2v_client, + k2v, }) } /// Lists user's available mailboxes - pub fn list_mailboxes(&self) -> Result<Vec<String>> { - unimplemented!() + 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()) } /// Opens an existing mailbox given its IMAP name. pub async fn open_mailbox(&self, name: &str) -> Result<Option<Arc<Mailbox>>> { - // TODO: handle mailbox names, mappings, renaming, etc - let id = match name { - "INBOX" => UniqueIdent([0u8; 24]), - _ => panic!("Only INBOX exists for now"), - }; + let (list, _ct) = self.load_mailbox_list().await?; + match list.get(name) { + Some(MailboxListEntry { id_lww: (_, Some(mbid)), uidvalidity }) => + self.open_mailbox_by_id(*mbid, *uidvalidity).await, + _ => + bail!("Mailbox does not exist: {}", name), + } + } + + /// Creates a new mailbox in the user's IMAP namespace. + pub fn create_mailbox(&self, _name: &str) -> Result<()> { + unimplemented!() + } + + /// Deletes a mailbox in the user's IMAP namespace. + pub fn delete_mailbox(&self, _name: &str) -> Result<()> { + unimplemented!() + } + + /// Renames a mailbox in the user's IMAP namespace. + pub fn rename_mailbox(&self, _old_name: &str, _new_name: &str) -> Result<()> { + unimplemented!() + } + // ---- Internal mailbox management ---- + + async fn open_mailbox_by_id(&self, id: UniqueIdent, min_uidvalidity: ImapUidvalidity) -> Result<Option<Arc<Mailbox>>> { let cache_key = (self.creds.storage.clone(), id); { @@ -52,7 +85,7 @@ impl User { } } - let mb = Arc::new(Mailbox::open(&self.creds, id).await?); + let mb = Arc::new(Mailbox::open(&self.creds, id, min_uidvalidity).await?); let mut cache = MAILBOX_CACHE.cache.lock().unwrap(); if let Some(concurrent_mb) = cache.get(&cache_key).and_then(Weak::upgrade) { @@ -64,20 +97,82 @@ impl User { } } - /// Creates a new mailbox in the user's IMAP namespace. - pub fn create_mailbox(&self, _name: &str) -> Result<()> { - unimplemented!() + // ---- Mailbox list management ---- + + async fn load_mailbox_list(&self) -> Result<(MailboxList, Option<CausalityToken>)> { + let cv = match self.k2v.read_item("mailboxes", "list").await { + Err(k2v_client::Error::NotFound) => return Ok((BTreeMap::new(), None)), + Err(e) => return Err(e.into()), + Ok(cv) => cv, + }; + + let mut list = BTreeMap::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); + } + } + + // If INBOX doesn't exist, create a new mailbox with that name + // and save new mailbox list. + match list.get_mut(INBOX) { + None => { + list.insert(INBOX.into(), MailboxListEntry { + id_lww: (now_msec(), Some(gen_ident())), + uidvalidity: ImapUidvalidity::new(1).unwrap(), + }); + self.save_mailbox_list(&list, Some(cv.causality.clone())).await?; + } + Some(MailboxListEntry { id_lww, uidvalidity }) if id_lww.1.is_none() => { + id_lww.0 = std::cmp::max(id_lww.0 + 1, now_msec()); + id_lww.1 = Some(gen_ident()); + *uidvalidity = ImapUidvalidity::new(uidvalidity.get() + 1).unwrap(); + self.save_mailbox_list(&list, Some(cv.causality.clone())).await?; + } + _ => (), + } + + Ok((list, Some(cv.causality))) } - /// Deletes a mailbox in the user's IMAP namespace. - pub fn delete_mailbox(&self, _name: &str) -> Result<()> { - unimplemented!() + async fn save_mailbox_list(&self, list: &MailboxList, ct: Option<CausalityToken>) -> Result<()> { + let list_blob = seal_serialize(list, &self.creds.keys.master)?; + self.k2v.insert_item("mailboxes", "list", list_blob, ct).await?; + Ok(()) } +} - /// Renames a mailbox in the user's IMAP namespace. - pub fn rename_mailbox(&self, _old_name: &str, _new_name: &str) -> Result<()> { - unimplemented!() +// ---- User's mailbox list (serialized in K2V) ---- + +type MailboxList = BTreeMap<String, MailboxListEntry>; + +#[derive(Serialize, Deserialize, Clone, Copy)] +struct MailboxListEntry { + id_lww: (u64, Option<UniqueIdent>), + uidvalidity: ImapUidvalidity, +} + +impl MailboxListEntry { + fn merge(&mut self, other: &Self) { + // Simple CRDT merge rule + if other.id_lww.0 > self.id_lww.0 + || (other.id_lww.0 == self.id_lww.0 && other.id_lww.1 > self.id_lww.1) { + self.id_lww = other.id_lww; + } + self.uidvalidity = std::cmp::max(self.uidvalidity, other.uidvalidity); + } +} + +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) { + e.merge(&v); + } else { + list1.insert(k, v); + } } + list1 } // ---- Mailbox cache ---- |