➕ Adds mailer library

backend/src/models/mod.rs

@@ -1,5 +1,7 @@
 use diesel::PgConnection;
 use diesel::r2d2::{ConnectionManager, Pool};
+use lettre::SmtpTransport;
+use std::sync::{Arc, Mutex};
 
 pub const DEFAULT_QUERY_LIMIT: i64 = 100;
 
@@ -7,10 +9,14 @@ pub mod action;
 
 pub struct AppState {
     pub db: Pool<ConnectionManager<PgConnection>>,
+    pub mailer: Arc<Mutex<SmtpTransport>>,
 }
 
 impl AppState {
-    pub fn new(pool: Pool<ConnectionManager<PgConnection>>) -> Self {
-        Self { db: pool }
+    pub fn new(pool: Pool<ConnectionManager<PgConnection>>, mailer: SmtpTransport) -> Self {
+        Self {
+            db: pool,
+            mailer: Arc::new(Mutex::new(mailer)),
+        }
     }
 }