Deduplicate privilege entries (#465)

Author: trueleo

server/src/handlers/http/rbac.rs

@@ -16,6 +16,8 @@
  *
  */
 
+use std::collections::HashSet;
+
 use crate::{
     option::CONFIG,
     rbac::{
@@ -124,7 +126,8 @@ pub async fn put_role(
 ) -> Result<String, RBACError> {
     let username = username.into_inner();
     let role = role.into_inner();
-    let role: Vec<DefaultPrivilege> = serde_json::from_value(role)?;
+    let role: HashSet<DefaultPrivilege> = serde_json::from_value(role)?;
+    let role = role.into_iter().collect();
 
     if !Users.contains(&username) {
         return Err(RBACError::UserDoesNotExist);

server/src/rbac/role.rs

@@ -104,7 +104,7 @@ impl RoleBuilder {
 pub mod model {
     use super::{Action, RoleBuilder};
 
-    #[derive(Debug, Clone, PartialEq, Eq, serde::Serialize, serde::Deserialize)]
+    #[derive(Debug, Clone, PartialEq, Eq, serde::Serialize, serde::Deserialize, Hash)]
     #[serde(tag = "privilege", content = "resource", rename_all = "lowercase")]
     pub enum DefaultPrivilege {
         Admin,