1 files changed, 53 insertions, 0 deletions
diff --git a/src/login/repo/auth.rs b/src/login/repo/auth.rs
new file mode 100644
index 0000000..78b44f0
--- /dev/null
+++ b/src/login/repo/auth.rs
@@ -0,0 +1,53 @@
+use sqlx::{sqlite::Sqlite, SqliteConnection, Transaction};
+
+use crate::{
+    password::StoredHash,
+    repo::login::{self, Login},
+};
+
+pub trait Provider {
+    fn auth(&mut self) -> Auth;
+}
+
+impl<'c> Provider for Transaction<'c, Sqlite> {
+    fn auth(&mut self) -> Auth {
+        Auth(self)
+    }
+}
+
+pub struct Auth<'t>(&'t mut SqliteConnection);
+
+impl<'t> Auth<'t> {
+    /// Retrieves a login by name, plus its stored password hash for
+    /// verification. If there's no login with the requested name, this will
+    /// return [None].
+    pub async fn for_name(
+        &mut self,
+        name: &str,
+    ) -> Result<Option<(Login, StoredHash)>, sqlx::Error> {
+        let found = sqlx::query!(
+            r#"
+				select
+					id as "id: login::Id",
+					name,
+					password_hash as "password_hash: StoredHash"
+				from login
+				where name = $1
+			"#,
+            name,
+        )
+        .map(|rec| {
+            (
+                Login {
+                    id: rec.id,
+                    name: rec.name,
+                },
+                rec.password_hash,
+            )
+        })
+        .fetch_optional(&mut *self.0)
+        .await?;
+
+        Ok(found)
+    }
+}