Added Connection and connection::Builder; Fixed a lot of Clippy lints;

src/connection/builder.rs

@@ -0,0 +1,35 @@
+use super::verifier::Verifier;
+use crate::prelude::CertificateStore;
+use std::net::TcpStream;
+
+#[derive(Debug)]
+pub struct Builder<S: CertificateStore> {
+    pub stream: Option<TcpStream>,
+    pub verifier: Option<Verifier<S>>,
+}
+
+impl<S: CertificateStore> Default for Builder<S> {
+    fn default() -> Self {
+        Self { stream: None, verifier: None }
+    }
+}
+
+impl<S: CertificateStore> Builder<S> {
+    pub fn new() -> Self {
+        Self::default()
+    }
+
+    pub fn stream(mut self, stream: TcpStream) -> Self {
+        self.stream = Some(stream);
+        self
+    }
+
+    pub fn verifier(mut self, verifier: Verifier<S>) -> Self {
+        self.verifier = Some(verifier);
+        self
+    }
+
+    pub fn build(self) -> super::Connection {
+        todo!()
+    }
+}

src/connection/error.rs

@@ -0,0 +1 @@
+

src/connection/mod.rs

@@ -0,0 +1,8 @@
+pub mod builder;
+pub mod error;
+pub mod verifier;
+
+#[derive(Debug)]
+pub struct Connection {
+    pub inner: rustls::ServerConnection,
+}

src/connection/verifier.rs

@@ -0,0 +1,7 @@
+use crate::prelude::CertificateStore;
+use std::sync::Mutex;
+
+#[derive(Debug)]
+pub struct Verifier<S: CertificateStore> {
+    pub store: Mutex<S>,
+}

src/fingerprint/mod.rs

@@ -31,7 +31,7 @@ impl GetFingerprint for Certificate {
         subject.iter_common_name().for_each(|n| {
             let mut val = n.attr_value().data;
             let mut name = String::new();
-            if let Ok(_) = val.read_to_string(&mut name) {
+            if val.read_to_string(&mut name).is_ok() {
                 names.push(name);
             }
         });

src/host/mod.rs

@@ -80,7 +80,7 @@ impl ToSocketAddrs for Host {
     type Iter = std::vec::IntoIter<SocketAddr>;
 
     fn to_socket_addrs(&self) -> std::io::Result<Self::Iter> {
-        format!("{}:1958", self).to_socket_addrs()
+        format!("{self}:1958").to_socket_addrs()
     }
 }
 

src/lib.rs

@@ -1,5 +1,6 @@
 #![warn(clippy::all, clippy::pedantic)]
 pub mod certificate;
+pub mod connection;
 pub mod fingerprint;
 pub mod host;
 pub mod mailbox;

src/mailbox/mod.rs

@@ -33,23 +33,22 @@ impl FromStr for Mailbox {
         if let Some((username, mut host)) = s.split_once('@') {
             if username.is_empty() {
                 Err(Error::EmptyUser)
-            } else if username.contains(|c: char| c.is_whitespace()) {
+            } else if username.contains(char::is_whitespace) {
                 Err(Error::IllegalWhitespace)
             } else {
                 let username = username.to_string();
-                if let Some((h, b)) = host.split_once(|c: char| c.is_whitespace()) {
+                if let Some((h, b)) = host.split_once(char::is_whitespace) {
                     if h.is_empty() {
                         return Err(Error::EmptyHost);
-                    } else if h.contains(|c: char| c.is_whitespace()) {
+                    } else if h.contains(char::is_whitespace) {
                         return Err(Error::IllegalWhitespace);
-                    } else {
-                        host = h;
-                        if !b.is_empty() {
-                            if b.contains("\n") {
-                                return Err(Error::IllegalWhitespace);
-                            }
-                            blurb = Some(b.to_string());
+                    }
+                    host = h;
+                    if !b.is_empty() {
+                        if b.contains('\n') {
+                            return Err(Error::IllegalWhitespace);
                         }
+                        blurb = Some(b.to_string());
                     }
                 }
                 let host = host.parse()?;

src/mailstore/filesystem.rs

@@ -4,7 +4,6 @@ use std::{
     io::{self, Write},
     os::unix::fs::DirBuilderExt,
     path::PathBuf,
-    process::id,
 };
 
 pub trait MultiDomain: MailStore {
@@ -39,7 +38,7 @@ impl MailStore for Filesystem {
     fn has_mailuser(&self, mailuser: &str) -> bool {
         if let Some((user, host)) = mailuser.rsplit_once('@') {
             let mut path = self.path.clone();
-            if host.contains('.') && !host.contains(|c: char| c.is_whitespace()) {
+            if host.contains('.') && !host.contains(char::is_whitespace) {
                 path.push(host);
                 path.push(user);
                 return path.exists();
@@ -63,7 +62,7 @@ impl MailStore for Filesystem {
             name: folder.to_string(),
             messages: HashMap::new(),
         };
-        dir.filter(|x| x.is_ok()).map(|x| x.unwrap()).for_each(|e| {
+        dir.filter_map(Result::ok).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);
@@ -77,7 +76,7 @@ impl MailStore for Filesystem {
         self.get_folder(user, folder).and_then(|f| {
             f.messages
                 .values()
-                .find(|m| m.title.as_ref().map(|x| x.as_str()) == Some(title))
+                .find(|m| m.title.as_ref().map(String::as_str) == Some(title))
                 .cloned()
         })
     }
@@ -172,7 +171,7 @@ impl MultiDomain for Filesystem {
         if !path.exists() {
             fs::DirBuilder::new()
                 .recursive(true)
-                .mode(700)
+                .mode(0o700)
                 .create(path)?;
         }
         Ok(())

src/mailstore/mod.rs

@@ -1,6 +1,6 @@
 #![allow(unused_variables)]
-use crate::prelude::{Host, Mailbox, Mailuser, Message, ParseMailboxError};
-use std::{collections::HashMap, convert::Infallible, io, str::FromStr};
+use crate::prelude::{Host, Mailbox, Mailuser, Message};
+use std::{collections::HashMap, io, str::FromStr};
 
 #[cfg(feature = "serde")]
 use serde::{Deserialize, Serialize};
@@ -88,8 +88,7 @@ impl MailStore for Domain {
     fn has_mailuser(&self, mailuser: &str) -> bool {
         self.users()
             .iter()
-            .find(|x| x.username == mailuser)
-            .is_some()
+            .any(|x| x.username == mailuser)
     }
 
     fn get_folder(&self, user: &str, folder: &str) -> Option<Folder> {
@@ -106,7 +105,7 @@ impl MailStore for Domain {
                 u.folders.get(folder).and_then(|f| {
                     f.messages
                         .values()
-                        .find(|m| m.title.as_ref().map(|x| x.as_str()) == Some(title))
+                        .find(|m| m.title.as_ref().map(String::as_str) == Some(title))
                 })
             })
             .cloned()
@@ -126,7 +125,7 @@ impl MailStore for Domain {
         if self.users.contains_key(user) {
             return Ok(());
         }
-        let mbox = Mailbox::from_str(&format!("{user}@{}", self.host.to_string()))
+        let mbox = Mailbox::from_str(&format!("{user}@{}", self.host))
             .map_err(|e| io::Error::new(io::ErrorKind::Other, format!("{e}")))?;
         let folders = HashMap::new();
         let acct = Account {

src/message/mod.rs

@@ -68,12 +68,12 @@ impl fmt::Display for Message {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         if !self.senders.is_empty() {
             write!(f, "< ")?;
-            self.senders.iter().try_for_each(|s| write!(f, "{s}\n"))?;
+            self.senders.iter().try_for_each(|s| writeln!(f, "{s}"))?;
         }
         if !self.recipients.is_empty() {
             write!(f, ": ")?;
             self.recipients.iter().try_for_each(|r| write!(f, " {r}"))?;
-            write!(f, "\n")?;
+            writeln!(f)?;
         }
         write!(f, "{}\r\n", self.body)
     }

src/request/mod.rs

@@ -49,8 +49,8 @@ impl Request {
     pub fn recipients(&self) -> Vec<Mailuser> {
         let mut recipients = vec![];
         self.message.lines().for_each(|l| {
-            if l.starts_with(':') {
-                l[1..].trim().split_whitespace().for_each(|u| {
+            if let Some(s) = l.strip_prefix(':') {
+                s.split_whitespace().for_each(|u| {
                     if let Ok(user) = u.parse() {
                         recipients.push(user);
                     }
@@ -63,8 +63,8 @@ impl Request {
     pub fn senders(&self) -> Vec<Mailbox> {
         let mut senders = vec![];
         self.message.lines().for_each(|l| {
-            if l.starts_with('<') {
-                if let Ok(mbox) = l[1..].trim().parse() {
+            if let Some(s) = l.strip_prefix('<') {
+                if let Ok(mbox) = s.trim().parse() {
                     senders.push(mbox);
                 }
             }
@@ -73,13 +73,12 @@ impl Request {
     }
 
     pub fn timestamp(&self) -> Option<String> {
-        let mut ts = None;
-        self.message.lines().for_each(|l| {
-            if l.starts_with('@') {
-                ts = Some(l[1..].trim().to_string());
+        for l in self.message.lines() {
+            if let Some(s) = l.strip_prefix('@') {
+                return Some(s.trim().to_string());
             }
-        });
-        ts
+        }
+        None
     }
 }
 

src/sender/verifier.rs

@@ -9,15 +9,15 @@ use {
 
 #[derive(Debug)]
 /// A verifier is used to verify certificates sent by the receiving server
-/// during the tls handshake. For convenience the [CertificateStore] trait
-/// is implemented for [std::collections::HashMap<String, String>] and
-/// [std::collections::BTreeMap<String, String>], so a Verifier can easily
+/// during the tls handshake. For convenience the [`CertificateStore`] trait
+/// is implemented for [`std::collections::HashMap<String, String>`] and
+/// [`std::collections::BTreeMap<String, String>`], so a Verifier can easily
 /// be constructed from those types.
 ///
-/// This type is passed to [rustls::client::DangerousClientConfig::set_certificate_verifier]
+/// This type is passed to [`rustls::client::DangerousClientConfig::set_certificate_verifier`]
 /// in order to allow Tofu certificate validation.
 /// # Examples
-/// Create a Verifier from a HashMap
+/// Create a Verifier from a `HashMap`
 /// ```
 /// use std::collections::HashMap;
 /// use dory::prelude::{CertificateStore, Verifier};
@@ -70,7 +70,7 @@ impl<S: CertificateStore> ServerCertVerifier for Verifier<S> {
                     .borrow_mut()
                     .insert_certificate(&name, &fp.fingerprint);
             }
-            return Ok(ServerCertVerified::assertion());
+            Ok(ServerCertVerified::assertion())
         }
     }
 }