Some tweaks to MailStore trait

src/mailstore/mod.rs

@@ -1,6 +1,6 @@
 use crate::prelude::{Host, Mailbox, Mailuser, Message, ParseMailboxError};
 use std::{
-    collections::{BTreeMap, HashMap},
+    collections::HashMap,
     str::FromStr,
 };
 
@@ -15,10 +15,14 @@ pub trait MailStore {
     /// Checks whether this server has the given mailuser
     fn has_mailuser(&self, mailuser: &str) -> bool;
     /// Retreives all of the messages for this user
-    fn get_user_messages(&self, user: &str) -> Option<BTreeMap<String, Message>>;
+    fn get_folder(&self, user: &str, folder: &str) -> Option<Folder>;
     /// Checks whether this server has a message with the given title for this user and if so
     /// returns the message
-    fn get_message(&self, user: &str, title: &str) -> Option<Message>;
+    fn get_message(&self, user: &str, folder: &str, title: &str) -> Option<Message>;
+    /// Deletes a message it it exists
+    fn delete_message(&mut self, user: &str, folder: &str, key: &str) -> bool;
+    /// Adds a message
+    fn add_message(&mut self, user: &str, folder: &str, message: Message);
     /// Adds a new mailuser to the given domain
     fn add_user(&mut self, user: &str) -> Result<(), ParseMailboxError>;
     /// Removes the given user if the account exists
@@ -36,7 +40,14 @@ pub struct Domain {
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub struct Account {
     pub user: Mailbox,
-    pub messages: BTreeMap<String, Message>,
+    pub folders: HashMap<String, Folder>,
+}
+
+#[derive(Clone, Debug)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+pub struct Folder {
+    pub name: String,
+    pub messages: HashMap<String, Message>,
 }
 
 #[derive(Debug)]
@@ -64,19 +75,23 @@ impl MailStore for Domain {
             .is_some()
     }
 
-    fn get_user_messages(&self, user: &str) -> Option<BTreeMap<String, Message>> {
+    fn get_folder(&self, user: &str, folder: &str) -> Option<Folder> {
-        self.users.get(user).cloned().map(|u| u.messages)
-    }
-
-    fn get_message(&self, user: &str, title: &str) -> Option<Message> {
         self.users
             .get(user)
-            .map(|u| {
+            .cloned()
-                u.messages
+            .and_then(|u| u.folders.get(folder).cloned())
+    }
+
+    fn get_message(&self, user: &str, folder: &str, title: &str) -> Option<Message> {
+        self.users
+            .get(user)
+            .and_then(|u| {
+                u.folders.get(folder).and_then(|f| {
+                    f.messages
                         .values()
                         .find(|m| m.title.as_ref().map(|x| x.as_str()) == Some(title))
                 })
-            .flatten()
+            })
             .cloned()
     }
 
@@ -85,10 +100,10 @@ impl MailStore for Domain {
             return Ok(());
         }
         let mbox = Mailbox::from_str(&format!("{user}@{}", self.host.to_string()))?;
-        let messages = BTreeMap::new();
+        let folders = HashMap::new();
         let acct = Account {
             user: mbox,
-            messages,
+            folders,
         };
         self.users.insert(user.to_string(), acct);
         Ok(())
@@ -97,4 +112,12 @@ impl MailStore for Domain {
     fn remove_user(&mut self, user: &str) -> bool {
         self.users.remove(user).is_some()
     }
+
+    fn add_message(&mut self, user: &str, folder: &str, message: Message) {
+        todo!()
+    }
+
+    fn delete_message(&mut self, user: &str, folder: &str, key: &str) -> bool {
+        todo!()
+    }
 }

src/message/mod.rs

@@ -56,6 +56,7 @@ impl fmt::Display for Lines {
 #[derive(Debug, Clone, PartialEq)]
 #[cfg_attr(feature = "serde", derive(Deserialize, Serialize))]
 pub struct Message {
+    pub id: String,
     pub senders: Vec<Mailbox>,
     pub recipients: Vec<Mailbox>,
     pub timstamp: Option<String>,