Initial commit

dao/src/lib.rs

@@ -0,0 +1,21 @@
+use std::{future::Future, sync::Arc};
+
+use thiserror::Error;
+
+#[derive(Error, Debug)]
+pub enum DaoError {
+    #[error("Database query error: {0}")]
+    DatabaseQueryError(#[from] Box<dyn std::error::Error>),
+}
+
+pub trait HelloDao {
+    fn get_hello(&self) -> impl Future<Output = Result<Arc<str>, DaoError>> + Send;
+}
+
+pub trait PermissionDao {
+    fn has_privilege(
+        &self,
+        user: &str,
+        privilege: &str,
+    ) -> impl Future<Output = Result<bool, DaoError>> + Send;
+}