- add: initial database and auth services

auth-service/src/database_client.rs

@@ -0,0 +1,36 @@
+use tonic::transport::Channel;
+use crate::database::{database_service_client::DatabaseServiceClient, GetUserByUsernameRequest, GetUserRequest, GetUserResponse};
+
+#[derive(Clone)]
+pub struct DatabaseClient {
+    client: DatabaseServiceClient<Channel>,
+}
+
+impl DatabaseClient {
+    pub async fn connect(endpoint: &str) -> Result<Self, Box<dyn std::error::Error>> {
+        let client = DatabaseServiceClient::connect(endpoint.to_string()).await?;
+        Ok(Self { client })
+    }
+
+    pub async fn get_user_by_userid(
+        &mut self,
+        user_id: i32,
+    ) -> Result<GetUserResponse, Box<dyn std::error::Error>> {
+        let request = tonic::Request::new(GetUserRequest {
+            user_id,
+        });
+        let response = self.client.get_user(request).await?;
+        Ok(response.into_inner())
+    }
+
+    pub async fn get_user_by_username(
+        &mut self,
+        username: &str,
+    ) -> Result<GetUserResponse, Box<dyn std::error::Error>> {
+        let request = tonic::Request::new(GetUserByUsernameRequest {
+            username: username.to_string(),
+        });
+        let response = self.client.get_user_by_username(request).await?;
+        Ok(response.into_inner())
+    }
+}