JMAP Registry API implementation - part 5

crates/types/src/blob.rs

@@ -32,8 +32,8 @@ pub enum BlobClass {
 impl Default for BlobClass {
     fn default() -> Self {
         BlobClass::Reserved {
-            account_id: 0,
-            expires: 0,
+            account_id: u32::MAX,
+            expires: u64::MAX,
         }
     }
 }
@@ -64,6 +64,10 @@ impl BlobClass {
             BlobClass::Linked { .. } => true,
         }
     }
+
+    pub fn is_superuser(&self) -> bool {
+        matches!(self, BlobClass::Reserved { account_id, expires } if *account_id == u32::MAX && *expires == u64::MAX)
+    }
 }
 
 #[derive(Debug, Default, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]