refactor code to use Shrinkwraprs and diesel-derive-newtype (#598)

* add shrinkwraprs and implement Id thru it

This also means we can automatically convert Id to String without using
.into()!

* cleanup with the help of clippy!

* cleanup with the help of cargo fmt!

* remove extra block

* Shrinkwrap Page, ContentLen and RemoteForm

* translations

src/main.rs

@@ -62,6 +62,8 @@ mod mail;
 #[macro_use]
 mod template_utils;
 mod routes;
+#[macro_use]
+extern crate shrinkwraprs;
 #[cfg(feature = "test")]
 mod test_routes;
 

src/routes/mod.rs

@@ -16,7 +16,7 @@ use plume_models::{posts::Post, Connection};
 
 const ITEMS_PER_PAGE: i32 = 12;
 
-#[derive(Copy, Clone, UriDisplayQuery)]
+#[derive(Shrinkwrap, Copy, Clone, UriDisplayQuery)]
 pub struct Page(i32);
 
 impl<'v> FromFormValue<'v> for Page {
@@ -52,6 +52,7 @@ impl Page {
     }
 }
 
+#[derive(Shrinkwrap)]
 pub struct ContentLen(pub u64);
 
 impl<'a, 'r> FromRequest<'a, 'r> for ContentLen {
@@ -72,7 +73,7 @@ impl Default for Page {
 }
 
 /// A form for remote interaction, used by multiple routes
-#[derive(Clone, Default, FromForm)]
+#[derive(Shrinkwrap, Clone, Default, FromForm)]
 pub struct RemoteForm {
     pub remote: String,
 }

src/routes/user.rs

@@ -193,8 +193,7 @@ pub fn follow_not_connected(
 ) -> Result<Result<Flash<Ructe>, Redirect>, ErrorPage> {
     let target = User::find_by_fqn(&rockets, &name)?;
     if let Some(remote_form) = remote_form {
-        let remote = &remote_form.remote;
-        if let Some(uri) = User::fetch_remote_interact_uri(remote)
+        if let Some(uri) = User::fetch_remote_interact_uri(&remote_form)
             .ok()
             .and_then(|uri| {
                 rt_format!(