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authorAlex Auvolat <alex@adnab.me>2022-06-29 15:39:54 +0200
committerAlex Auvolat <alex@adnab.me>2022-06-29 15:39:54 +0200
commitb95028f89e4db7c3158fab3b71ea56a742daba21 (patch)
tree262a212c7eec8cf26ec70cbb7d12c2264a1e3da2 /src/imap
parent8b7eb1ca918d26901b0739526341128067ca1cbc (diff)
downloadaerogramme-b95028f89e4db7c3158fab3b71ea56a742daba21.tar.gz
aerogramme-b95028f89e4db7c3158fab3b71ea56a742daba21.zip
Some refactoring on mailbox structures and views
Diffstat (limited to 'src/imap')
-rw-r--r--src/imap/command/authenticated.rs68
-rw-r--r--src/imap/command/selected.rs3
-rw-r--r--src/imap/flow.rs5
-rw-r--r--src/imap/mailbox_view.rs154
-rw-r--r--src/imap/mod.rs1
5 files changed, 173 insertions, 58 deletions
diff --git a/src/imap/command/authenticated.rs b/src/imap/command/authenticated.rs
index 47df5be..443edda 100644
--- a/src/imap/command/authenticated.rs
+++ b/src/imap/command/authenticated.rs
@@ -8,18 +8,11 @@ use imap_codec::types::response::{Code, Data, Status};
use crate::imap::command::anonymous;
use crate::imap::flow;
+use crate::imap::mailbox_view::MailboxView;
use crate::mail::mailbox::Mailbox;
use crate::mail::user::User;
-const DEFAULT_FLAGS: [Flag; 5] = [
- Flag::Seen,
- Flag::Answered,
- Flag::Flagged,
- Flag::Deleted,
- Flag::Draft,
-];
-
pub struct AuthenticatedContext<'a> {
pub req: &'a Request,
pub user: &'a User,
@@ -96,59 +89,24 @@ impl<'a> AuthenticatedContext<'a> {
async fn select(self, mailbox: &MailboxCodec) -> Result<(Response, flow::Transition)> {
let name = String::try_from(mailbox.clone())?;
- let mut mb = self.user.open_mailbox(name)?;
+ let mb_opt = self.user.open_mailbox(&name).await?;
+ let mb = match mb_opt {
+ Some(mb) => mb,
+ None => {
+ return Ok((
+ Response::no("Mailbox does not exist")?,
+ flow::Transition::None,
+ ))
+ }
+ };
tracing::info!(username=%self.user.username, mailbox=%name, "mailbox.selected");
- let sum = mb.summary().await?;
- tracing::trace!(summary=%sum, "mailbox.summary");
-
- let mut res = Vec::<Body>::new();
-
- res.push(Body::Data(Data::Exists(sum.exists)));
-
- res.push(Body::Data(Data::Recent(sum.recent)));
-
- let mut flags: Vec<Flag> = sum.flags.map(|f| match f.chars().next() {
- Some('\\') => None,
- Some('$') if f == "$unseen" => None,
- Some(_) => match Atom::try_from(f.clone()) {
- Err(_) => {
- tracing::error!(username=%self.user.username, mailbox=%name, flag=%f, "Unable to encode flag as IMAP atom");
- None
- },
- Ok(a) => Some(Flag::Keyword(a)),
- },
- None => None,
- }).flatten().collect();
- flags.extend_from_slice(&DEFAULT_FLAGS);
-
- res.push(Body::Data(Data::Flags(flags.clone())));
-
- let uid_validity = Status::ok(None, Some(Code::UidValidity(sum.validity)), "UIDs valid")
- .map_err(Error::msg)?;
- res.push(Body::Status(uid_validity));
-
- let next_uid = Status::ok(None, Some(Code::UidNext(sum.next)), "Predict next UID")
- .map_err(Error::msg)?;
- res.push(Body::Status(next_uid));
-
- if let Some(unseen) = sum.unseen {
- let status_unseen =
- Status::ok(None, Some(Code::Unseen(unseen.clone())), "First unseen UID")
- .map_err(Error::msg)?;
- res.push(Body::Status(status_unseen));
- }
-
- flags.push(Flag::Permanent);
- let permanent_flags =
- Status::ok(None, Some(Code::PermanentFlags(flags)), "Flags permitted")
- .map_err(Error::msg)?;
- res.push(Body::Status(permanent_flags));
+ let (mb, data) = MailboxView::new(mb).await?;
Ok((
Response::ok("Select completed")?
.with_extra_code(Code::ReadWrite)
- .with_body(res),
+ .with_body(data),
flow::Transition::Select(mb),
))
}
diff --git a/src/imap/command/selected.rs b/src/imap/command/selected.rs
index b1bba23..4e3ff2f 100644
--- a/src/imap/command/selected.rs
+++ b/src/imap/command/selected.rs
@@ -9,6 +9,7 @@ use imap_codec::types::sequence::SequenceSet;
use crate::imap::command::authenticated;
use crate::imap::flow;
+use crate::imap::mailbox_view::MailboxView;
use crate::mail::mailbox::Mailbox;
use crate::mail::user::User;
@@ -16,7 +17,7 @@ use crate::mail::user::User;
pub struct SelectedContext<'a> {
pub req: &'a Request,
pub user: &'a User,
- pub mailbox: &'a mut Mailbox,
+ pub mailbox: &'a mut MailboxView,
}
pub async fn dispatch<'a>(ctx: SelectedContext<'a>) -> Result<(Response, flow::Transition)> {
diff --git a/src/imap/flow.rs b/src/imap/flow.rs
index 0fe6f92..c9d7e40 100644
--- a/src/imap/flow.rs
+++ b/src/imap/flow.rs
@@ -1,6 +1,7 @@
use std::error::Error as StdError;
use std::fmt;
+use crate::imap::mailbox_view::MailboxView;
use crate::mail::mailbox::Mailbox;
use crate::mail::user::User;
@@ -18,14 +19,14 @@ impl StdError for Error {}
pub enum State {
NotAuthenticated,
Authenticated(User),
- Selected(User, Mailbox),
+ Selected(User, MailboxView),
Logout,
}
pub enum Transition {
None,
Authenticate(User),
- Select(Mailbox),
+ Select(MailboxView),
Unselect,
Logout,
}
diff --git a/src/imap/mailbox_view.rs b/src/imap/mailbox_view.rs
new file mode 100644
index 0000000..ec5580d
--- /dev/null
+++ b/src/imap/mailbox_view.rs
@@ -0,0 +1,154 @@
+use std::sync::Arc;
+
+use anyhow::{Error, Result};
+use boitalettres::proto::{res::body::Data as Body, Request, Response};
+use imap_codec::types::command::CommandBody;
+use imap_codec::types::core::Atom;
+use imap_codec::types::flag::Flag;
+use imap_codec::types::mailbox::{ListMailbox, Mailbox as MailboxCodec};
+use imap_codec::types::response::{Code, Data, Status};
+
+use crate::mail::mailbox::{Mailbox, Summary};
+use crate::mail::uidindex::UidIndex;
+
+const DEFAULT_FLAGS: [Flag; 5] = [
+ Flag::Seen,
+ Flag::Answered,
+ Flag::Flagged,
+ Flag::Deleted,
+ Flag::Draft,
+];
+
+/// A MailboxView is responsible for giving the client the information
+/// it needs about a mailbox, such as an initial summary of the mailbox's
+/// content and continuous updates indicating when the content
+/// of the mailbox has been changed.
+/// To do this, it keeps a variable `known_state` that corresponds to
+/// what the client knows, and produces IMAP messages to be sent to the
+/// client that go along updates to `known_state`.
+pub struct MailboxView {
+ mailbox: Arc<Mailbox>,
+ known_state: UidIndex,
+}
+
+impl MailboxView {
+ /// Creates a new IMAP view into a mailbox.
+ /// Generates the necessary IMAP messages so that the client
+ /// has a satisfactory summary of the current mailbox's state.
+ pub async fn new(mailbox: Arc<Mailbox>) -> Result<(Self, Vec<Body>)> {
+ let state = mailbox.current_uid_index().await;
+
+ let new_view = Self {
+ mailbox,
+ known_state: state,
+ };
+
+ let mut data = Vec::<Body>::new();
+ data.push(new_view.exists()?);
+ data.push(new_view.recent()?);
+ data.extend(new_view.flags()?.into_iter());
+ data.push(new_view.uidvalidity()?);
+ data.push(new_view.uidnext()?);
+ if let Some(unseen) = new_view.unseen()? {
+ data.push(unseen);
+ }
+
+ Ok((new_view, data))
+ }
+
+ // ----
+
+ /// Produce an OK [UIDVALIDITY _] message corresponding to `known_state`
+ fn uidvalidity(&self) -> Result<Body> {
+ let uid_validity = Status::ok(
+ None,
+ Some(Code::UidValidity(self.known_state.uidvalidity)),
+ "UIDs valid",
+ )
+ .map_err(Error::msg)?;
+ Ok(Body::Status(uid_validity))
+ }
+
+ /// Produce an OK [UIDNEXT _] message corresponding to `known_state`
+ fn uidnext(&self) -> Result<Body> {
+ let next_uid = Status::ok(
+ None,
+ Some(Code::UidNext(self.known_state.uidnext)),
+ "Predict next UID",
+ )
+ .map_err(Error::msg)?;
+ Ok(Body::Status(next_uid))
+ }
+
+ /// Produces an UNSEEN message (if relevant) corresponding to the
+ /// first unseen message id in `known_state`
+ fn unseen(&self) -> Result<Option<Body>> {
+ let unseen = self
+ .known_state
+ .idx_by_flag
+ .get(&"$unseen".to_string())
+ .and_then(|os| os.get_min())
+ .cloned();
+ if let Some(unseen) = unseen {
+ let status_unseen =
+ Status::ok(None, Some(Code::Unseen(unseen.clone())), "First unseen UID")
+ .map_err(Error::msg)?;
+ Ok(Some(Body::Status(status_unseen)))
+ } else {
+ Ok(None)
+ }
+ }
+
+ /// Produce an EXISTS message corresponding to the number of mails
+ /// in `known_state`
+ fn exists(&self) -> Result<Body> {
+ let exists = u32::try_from(self.known_state.idx_by_uid.len())?;
+ Ok(Body::Data(Data::Exists(exists)))
+ }
+
+ /// Produce a RECENT message corresponding to the number of
+ /// recent mails in `known_state`
+ fn recent(&self) -> Result<Body> {
+ let recent = self
+ .known_state
+ .idx_by_flag
+ .get(&"\\Recent".to_string())
+ .map(|os| os.len())
+ .unwrap_or(0);
+ let recent = u32::try_from(recent)?;
+ Ok(Body::Data(Data::Recent(recent)))
+ }
+
+ /// Produce a FLAGS and a PERMANENTFLAGS message that indicates
+ /// the flags that are in `known_state` + default flags
+ fn flags(&self) -> Result<Vec<Body>> {
+ let mut flags: Vec<Flag> = self
+ .known_state
+ .idx_by_flag
+ .flags()
+ .map(|f| match f.chars().next() {
+ Some('\\') => None,
+ Some('$') if f == "$unseen" => None,
+ Some(_) => match Atom::try_from(f.clone()) {
+ Err(_) => {
+ tracing::error!(flag=%f, "Unable to encode flag as IMAP atom");
+ None
+ }
+ Ok(a) => Some(Flag::Keyword(a)),
+ },
+ None => None,
+ })
+ .flatten()
+ .collect();
+ flags.extend_from_slice(&DEFAULT_FLAGS);
+ let mut ret = vec![Body::Data(Data::Flags(flags.clone()))];
+
+ flags.push(Flag::Permanent);
+ let permanent_flags =
+ Status::ok(None, Some(Code::PermanentFlags(flags)), "Flags permitted")
+ .map_err(Error::msg)?;
+ ret.push(Body::Status(permanent_flags));
+
+ Ok(ret)
+ }
+}
diff --git a/src/imap/mod.rs b/src/imap/mod.rs
index 0e9f49a..f85bcc6 100644
--- a/src/imap/mod.rs
+++ b/src/imap/mod.rs
@@ -1,5 +1,6 @@
mod command;
mod flow;
+mod mailbox_view;
mod session;
use std::task::{Context, Poll};
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-10 06:34:04 +0000