Initial commit

dao_impl/Cargo.toml

@@ -0,0 +1,13 @@
+[package]
+name = "dao_impl"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies.sqlx]
+version = "0.7.4"
+features = ["runtime-tokio", "sqlite"]
+
+[dependencies.dao]
+path = "../dao"

dao_impl/src/lib.rs

@@ -0,0 +1,51 @@
+use std::sync::Arc;
+
+use dao::DaoError;
+use sqlx::{query, SqlitePool};
+
+pub struct HelloDaoImpl {
+    pool: Arc<SqlitePool>,
+}
+
+impl HelloDaoImpl {
+    pub fn new(pool: Arc<SqlitePool>) -> Self {
+        Self { pool }
+    }
+}
+
+impl dao::HelloDao for HelloDaoImpl {
+    async fn get_hello(&self) -> Result<Arc<str>, dao::DaoError> {
+        let result = query!(r"SELECT 'Hello, world!' as message")
+            .fetch_all(self.pool.as_ref())
+            .await
+            .map_err(|err| DaoError::DatabaseQueryError(Box::new(err)))?;
+        let message: Arc<str> = result[0].message.clone().into();
+        Ok(message)
+    }
+}
+
+pub struct PermissionDaoImpl {
+    pool: Arc<SqlitePool>,
+}
+impl PermissionDaoImpl {
+    pub fn new(pool: Arc<SqlitePool>) -> Self {
+        Self { pool }
+    }
+}
+impl dao::PermissionDao for PermissionDaoImpl {
+    async fn has_privilege(&self, user: &str, privilege: &str) -> Result<bool, dao::DaoError> {
+        let result = query!(
+            r"SELECT count(*) as results FROM user 
+                                 INNER JOIN user_role ON user.id = user_role.user_id 
+                                 INNER JOIN role ON user_role.role_id = role.id 
+                                 INNER JOIN role_privilege ON role.id = role_privilege.role_id 
+                                 WHERE role_privilege.privilege_name = ? AND user.name = ?",
+            privilege,
+            user,
+        )
+        .fetch_all(self.pool.as_ref())
+        .await
+        .map_err(|err| DaoError::DatabaseQueryError(Box::new(err)))?;
+        Ok(result[0].results > 0)
+    }
+}