Fleshed out some methods in the Filesystem mail store

src/mailstore/filesystem.rs

@@ -38,7 +38,25 @@ impl MailStore for Filesystem {
     }
 
     fn get_folder(&self, user: &str, folder: &str) -> Option<Folder> {
-        todo!()
+        let Some((user, host)) = user.rsplit_once('@') else {
+            return None;
+        };
+        let mut path = self.path.clone();
+        path.push(host);
+        path.push(user);
+        path.push(folder);
+        let Ok(dir) = fs::read_dir(path) else {
+            return None;
+        };
+        let mut folder = Folder { name: folder.to_string(), messages: HashMap::new() };
+        dir.filter(|x| x.is_ok()).map(|x| x.unwrap()).for_each(|e| {
+            if let Ok(contents) = fs::read_to_string(e.path()) {
+                if let Ok(message) = contents.parse::<Message>() {
+                    folder.messages.insert(message.id.clone(), message);
+                }
+            }
+        });
+        Some(folder)
     }
 
     fn get_message(&self, user: &str, folder: &str, title: &str) -> Option<Message> {

src/message/mod.rs

@@ -78,3 +78,11 @@ impl fmt::Display for Message {
         write!(f, "{}\r\n", self.body)
     }
 }
+
+impl FromStr for Message {
+    type Err = String;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        todo!()
+    }
+}