readd removed utility, cleanup/shorten enum usage

src/application/services/drive_management_service.rs

@@ -24,6 +24,7 @@ use uuid::Uuid;
 
 use crate::application::ports::authorization_ports::AuthorizationEngine;
 use crate::common::errors::DomainError;
+use crate::domain::entities::drive::DriveKind;
 use crate::domain::repositories::drive_repository::{DriveRepository, DriveRepositoryError};
 use crate::domain::repositories::subject_group_repository::SubjectGroupRepository;
 use crate::domain::services::authorization::{Grant, Permission, Resource, Role, Subject};
@@ -556,10 +557,7 @@ impl DriveManagementService {
         let drive = self.drive_repo.get_by_id(drive_id).await.map_err(|e| {
             DomainError::internal_error("Drive", format!("Failed to fetch drive: {e:?}"))
         })?;
-        if matches!(
-            drive.drive.kind,
-            crate::domain::entities::drive::DriveKind::Personal
-        ) {
+        if matches!(drive.drive.kind, DriveKind::Personal) {
             tracing::info!(
                 target: "audit",
                 event = "drive_membership.rejected",

src/common/di.rs

@@ -6,6 +6,7 @@ use uuid::Uuid;
 use crate::application::ports::blob_storage_ports::BlobStorageBackend;
 use crate::application::ports::storage_ports::StorageUsagePort;
 use crate::common::config::StorageBackendType;
+use crate::domain::entities::drive::DriveKind;
 use crate::domain::repositories::drive_repository::DriveRepository;
 use crate::infrastructure::db::DbPools;
 
@@ -2201,11 +2202,11 @@ impl AppState {
 
         let drive = self.drive_repo.get_by_id(drive_id).await.ok()?.drive;
         match drive.kind {
-            crate::domain::entities::drive::DriveKind::Personal => {
+            DriveKind::Personal => {
                 let (used, quota) = storage_svc.get_user_storage_info(user_id).await.ok()?;
                 Some((used, (quota > 0).then(|| (quota - used).max(0))))
             }
-            crate::domain::entities::drive::DriveKind::Shared => {
+            DriveKind::Shared => {
                 let used = drive.used_bytes;
                 Some((used, drive.quota_bytes.map(|q| (q - used).max(0))))
             }

src/domain/entities/drive.rs

@@ -138,6 +138,12 @@ impl Drive {
     pub fn typed_policies(&self) -> DrivePolicies {
         DrivePolicies::from_value(&self.policies)
     }
+
+    /// `true` if this drive is a personal drive of any kind (default or
+    /// secondary). Encapsulates the kind check at the call site.
+    pub fn is_personal(&self) -> bool {
+        matches!(self.kind, DriveKind::Personal)
+    }
 }
 
 /// Typed mirror of the `policies` JSONB. Five known keys; the JSONB column