Add queue for mail processing

Add DB table for queue. It is necessary in case the delivery fails and
we'll need to retry.

Signed-off-by: Mroik <mroik@delayed.space>

1 files changed, 20 insertions, 3 deletions

diff --git a/src/process_mail.rs b/src/process_mail.rs
index 5a22ce1..90fdd2a 100644
--- a/src/process_mail.rs
+++ b/src/process_mail.rs
@@ -1,11 +1,20 @@
+use std::sync::Arc;
+
 use anyhow::Result;
-use tokio::sync::mpsc::{Receiver, Sender};
+use tokio::sync::{
+    Mutex,
+    mpsc::{Receiver, Sender},
+};
 
-use crate::model::Mail;
+use crate::{
+    database::Database,
+    model::{Mail, MailQuery},
+};
 
 struct MailProcessor {
     rx: Receiver<Mail>,
     tx: Sender<Mail>,
+    db: Arc<Mutex<Database>>,
 }
 
 // TODO: Store first then forward. On complete forward remove from db, otherwise save db with the
@@ -15,9 +24,17 @@ impl MailProcessor {
         // TODO: Check againts self.rx.is_closed() instead to stop the program before consuming all
         // of the queue. Store the emails not yet processed and restore the queue upon startup.
         while let Some(mail) = self.rx.recv().await {
-            todo!()
+            let mut db_guard = self.db.lock().await;
+            db_guard.execute(MailQuery::Insert(&mail))?;
+            drop(db_guard);
+
+            todo!();
         }
 
         Ok(())
     }
 }
+
+mod tests {
+    // TODO: Think of a way to test
+}