Handle select

src/command.rs

@@ -1,5 +1,6 @@
-use boitalettres::errors::Error as BalError;
+use anyhow::Result;
 use boitalettres::proto::{Request, Response};
+use boitalettres::errors::Error as BalError;
 use imap_codec::types::core::{Tag, AString};
 use imap_codec::types::response::{Capability, Data};
 use imap_codec::types::mailbox::{Mailbox as MailboxCodec, ListMailbox};
@@ -20,7 +21,7 @@ impl<'a> Command<'a> {
         Self { tag, session }
     }
 
-    pub async fn capability(&self) -> Result<Response, BalError> {
+    pub async fn capability(&self) -> Result<Response> {
         let capabilities = vec![Capability::Imap4Rev1, Capability::Idle];
         let body = vec![Data::Capability(capabilities)];
         let r = Response::ok("Pre-login capabilities listed, post-login capabilities have more.")?
@@ -28,52 +29,68 @@ impl<'a> Command<'a> {
         Ok(r)
     }
 
-    pub async fn login(&mut self, username: AString, password: AString) -> Result<Response, BalError> {
-        let (u, p) = match (String::try_from(username), String::try_from(password)) {
-            (Ok(u), Ok(p)) => (u, p),
-            _ => return Response::bad("Invalid characters"),
-        };
+    pub async fn login(&mut self, username: AString, password: AString) -> Result<Response> {
+        let (u, p) = (String::try_from(username)?, String::try_from(password)?);
+        tracing::info!(user = %u, "command.login");
 
-        tracing::debug!(user = %u, "command.login");
         let creds = match self.session.mailstore.login_provider.login(&u, &p).await {
-            Err(_) => return Response::no("[AUTHENTICATIONFAILED] Authentication failed."),
+            Err(_) => return Ok(Response::no("[AUTHENTICATIONFAILED] Authentication failed.")?),
             Ok(c) => c,
         };
 
-        self.session.creds = Some(creds);
-        self.session.username = Some(u.clone());
+        self.session.user = Some(session::User { creds, name: u.clone(), });
 
         tracing::info!(username=%u, "connected");
-        Response::ok("Logged in")
+        Ok(Response::ok("Logged in")?)
     }
 
-    pub async fn lsub(&self, reference: MailboxCodec, mailbox_wildcard: ListMailbox) -> Result<Response, BalError> {
-        Response::bad("Not implemented")
+    pub async fn lsub(&self, reference: MailboxCodec, mailbox_wildcard: ListMailbox) -> Result<Response> {
+        Ok(Response::bad("Not implemented")?)
     }
 
-    pub async fn list(&self, reference: MailboxCodec, mailbox_wildcard: ListMailbox) -> Result<Response, BalError> {
-        Response::bad("Not implemented")
+    pub async fn list(&self, reference: MailboxCodec, mailbox_wildcard: ListMailbox) -> Result<Response> {
+        Ok(Response::bad("Not implemented")?)
     }
 
-    pub async fn select(&mut self, mailbox: MailboxCodec) -> Result<Response, BalError> {
-        let (name, creds) = match (String::try_from(mailbox), self.session.creds.as_ref()) {
-            (Ok(n), Some(c)) => (n, c),
-            (_, None) => return Response::no("You must be connected to use SELECT"),
-            (Err(e), _) => {
-                tracing::warn!("Unable to decode mailbox name: {:#?}", e);
-                return Response::bad("Unable to decode mailbox name")
-            },
+    /*
+     * TRACE BEGIN ---
+
+
+   Example:    C: A142 SELECT INBOX
+               S: * 172 EXISTS
+               S: * 1 RECENT
+               S: * OK [UNSEEN 12] Message 12 is first unseen
+               S: * OK [UIDVALIDITY 3857529045] UIDs valid
+               S: * OK [UIDNEXT 4392] Predicted next UID
+               S: * FLAGS (\Answered \Flagged \Deleted \Seen \Draft)
+               S: * OK [PERMANENTFLAGS (\Deleted \Seen \*)] Limited
+               S: A142 OK [READ-WRITE] SELECT completed
+
+     * TRACE END ---
+     */
+    pub async fn select(&mut self, mailbox: MailboxCodec) -> Result<Response> {
+        let name = String::try_from(mailbox)?;
+        let user = match self.session.user.as_ref() {
+            Some(u) => u,
+            _ => return Ok(Response::no("You must be connected to use SELECT")?),
         };
 
-        let mb = Mailbox::new(creds, name.clone()).unwrap();
+        let mut mb = Mailbox::new(&user.creds, name.clone())?;
+        tracing::info!(username=%user.name, mailbox=%name, "mailbox.selected");
+
+        let sum = mb.summary().await?;
+        tracing::trace!(summary=%sum, "mailbox.summary");
+
+        let body = vec![
+          Data::Exists(sum.exists.try_into()?),
+          Data::Recent(0),
+        ];
+
         self.session.selected = Some(mb);
-        let user = self.session.username.as_ref().unwrap();
-
-        tracing::info!(username=%user, mailbox=%name, "mailbox-selected");
-        Response::bad("Not implemented")
+        Ok(Response::ok("[READ-WRITE] Select completed")?.with_body(body))
     }
 
-    pub async fn fetch(&self, sequence_set: SequenceSet, attributes: MacroOrFetchAttributes, uid: bool) -> Result<Response, BalError> {
-        Response::bad("Not implemented")
+    pub async fn fetch(&self, sequence_set: SequenceSet, attributes: MacroOrFetchAttributes, uid: bool) -> Result<Response> {
+        Ok(Response::bad("Not implemented")?)
     }
 }

src/mailbox.rs

@@ -8,6 +8,17 @@ use crate::cryptoblob::Key;
 use crate::login::Credentials;
 use crate::uidindex::*;
 
+pub struct Summary {
+  pub validity: ImapUidvalidity,
+  pub next: ImapUid,
+  pub exists: usize,
+}
+impl std::fmt::Display for Summary {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        write!(f, "uidvalidity: {}, uidnext: {}, exists: {}", self.validity, self.next, self.exists)
+    }
+}
+
 pub struct Mailbox {
     bucket: String,
     pub name: String,
@@ -33,6 +44,17 @@ impl Mailbox {
         })
     }
 
+    pub async fn summary(&mut self) -> Result<Summary> {
+        self.uid_index.sync().await?;
+        let state = self.uid_index.state();
+
+        return Ok(Summary {
+          validity: state.uidvalidity,
+          next: state.uidnext,
+          exists: state.mail_uid.len(),
+        })
+    }
+
     pub async fn test(&mut self) -> Result<()> {
         self.uid_index.sync().await?;
 

src/session.rs

@@ -66,17 +66,21 @@ impl Manager {
     }
 }
 
+pub struct User {
+    pub name: String,
+    pub creds: Credentials,
+}
+
 pub struct Instance {
     rx: mpsc::Receiver<Message>,
 
     pub mailstore: Arc<Mailstore>, 
-    pub creds: Option<Credentials>,
     pub selected: Option<Mailbox>,
-    pub username: Option<String>,
+    pub user: Option<User>,
 }
 impl Instance {
     fn new(mailstore: Arc<Mailstore>, rx: mpsc::Receiver<Message>) -> Self {
-        Self { mailstore, rx, creds: None, selected: None, username: None, }
+        Self { mailstore, rx, selected: None, user: None, }
     }
 
     //@FIXME add a function that compute the runner's name from its local info
@@ -96,12 +100,20 @@ impl Instance {
                 CommandBody::List { reference, mailbox_wildcard } => cmd.list(reference, mailbox_wildcard).await,
                 CommandBody::Select { mailbox } => cmd.select(mailbox).await,
                 CommandBody::Fetch { sequence_set, attributes, uid } => cmd.fetch(sequence_set, attributes, uid).await,
-                _ => Response::bad("Error in IMAP command received by server."),
+                _ => Response::bad("Error in IMAP command received by server.").map_err(anyhow::Error::new),
             };
 
+            let wrapped_res = res.or_else(|e| match e.downcast::<BalError>() {
+                Ok(be) => Err(be),
+                Err(ae) => {
+                    tracing::warn!(error=%ae, "internal.error");
+                    Response::bad("Internal error")
+                }
+            });
+
             //@FIXME I think we should quit this thread on error and having our manager watch it,
             // and then abort the session as it is corrupted.
-            msg.tx.send(res).unwrap_or_else(|e| tracing::warn!("failed to send imap response to manager: {:#?}", e));
+            msg.tx.send(wrapped_res).unwrap_or_else(|e| tracing::warn!("failed to send imap response to manager: {:#?}", e));
         }
 
         //@FIXME add more info about the runner

src/uidindex.rs

@@ -3,8 +3,8 @@ use serde::{de::Error, Deserialize, Deserializer, Serialize, Serializer};
 
 use crate::bayou::*;
 
-type ImapUid = u32;
-type ImapUidvalidity = u32;
+pub type ImapUid = u32;
+pub type ImapUidvalidity = u32;
 
 /// A Mail UUID is composed of two components:
 /// - a process identifier, 128 bits
@@ -19,6 +19,7 @@ pub struct UidIndex {
 
     pub mails_by_uid: OrdMap<ImapUid, MailUuid>,
 
+
     pub uidvalidity: ImapUidvalidity,
     pub uidnext: ImapUid,
     pub internalseq: ImapUid,