Writing delegates may add at the top of a locked account's Files

A shared account refuses top-level folders, so an organize or full
delegate couldn't add anything to a locked account with no folders. A
delegate who may write now can, as the owner could; the reconcile after
the create grants it the new folder. Read delegates still can't (AL-6,
AL-7).

crates/common/src/auth/access_token.rs

@@ -840,6 +840,13 @@ impl AccessToken {
 
     /// inbuxa: AL-5: this account's delegation into a locked account, if it
     /// has one that hasn't ended.
+    /// inbuxa: AL-6, AL-7: a delegate at organize or full, who may add to
+    /// the locked account as its owner could, top-level folders included.
+    pub fn delegate_may_write(&self, account_id: u32) -> bool {
+        self.delegation(account_id)
+            .is_some_and(|d| d.access != inbuxa_features::lock::Access::Read)
+    }
+
     pub fn delegation(&self, account_id: u32) -> Option<&super::Delegation> {
         let now = now();
         self.inner

crates/jmap/src/file/copy.rs

@@ -226,9 +226,14 @@ impl FileNodeCopy for Server {
                     }
                 };
 
-            if let Err(err) =
-                validate_file_node_hierarchy(None, &file_node, is_shared, &cache, &created_folders)
-            {
+            // inbuxa: AL-7: a writing delegate may add at the top
+            if let Err(err) = validate_file_node_hierarchy(
+                None,
+                &file_node,
+                is_shared && !access_token.delegate_may_write(account_id),
+                &cache,
+                &created_folders,
+            ) {
                 response.not_created.append(id, err);
                 continue 'create;
             }
@@ -362,7 +367,7 @@ impl FileNodeCopy for Server {
                     );
                     continue 'create;
                 }
-            } else if is_shared {
+            } else if is_shared && !access_token.delegate_may_write(account_id) {
                 response.not_created.append(
                     id,
                     SetError::forbidden()

crates/jmap/src/file/set.rs

@@ -149,9 +149,15 @@ impl FileNodeSet for Server {
                 };
 
             // Validate hierarchy
-            if let Err(err) =
-                validate_file_node_hierarchy(None, &file_node, is_shared, &cache, &created_folders)
-            {
+            // inbuxa: AL-7: a writing delegate may add at the top of a
+            // locked account, which may hold no folders at all
+            if let Err(err) = validate_file_node_hierarchy(
+                None,
+                &file_node,
+                is_shared && !access_token.delegate_may_write(account_id),
+                &cache,
+                &created_folders,
+            ) {
                 response.not_created.append(id, err);
                 continue 'create;
             }

tests/src/system/account_lock.rs

@@ -193,6 +193,15 @@ pub async fn test(test: &mut TestServer) {
         assert_eq!(name, method, "AL-7: {method} refused to the delegate: {response}");
     }
 
+    // AL-6: reading adds nothing, not even at the top of empty Files
+    let (_, response) = delegate
+        .call(
+            "FileNode/set",
+            json!({"accountId": owner_id, "create": {"f": {"name": "Notes", "parentId": null}}}),
+        )
+        .await;
+    assert!(response["created"].get("f").is_none(), "AL-6: a read delegate added a file: {response}");
+
     // The delegate reads the mail that arrived
     let (_, found) = delegate
         .call(
@@ -236,6 +245,27 @@ pub async fn test(test: &mut TestServer) {
         "AL-5: {response}"
     );
 
+    // AL-7: organize adds at the top of the locked account's Files, which
+    // held none, and sees what it made
+    let (_, response) = delegate
+        .call(
+            "FileNode/set",
+            json!({"accountId": owner_id, "create": {"f": {"name": "Handover notes", "parentId": null}}}),
+        )
+        .await;
+    let folder_id = response["created"]["f"]["id"]
+        .as_str()
+        .unwrap_or_else(|| panic!("AL-7: organize couldn't add to empty Files: {response}"))
+        .to_string();
+    let (_, response) = delegate
+        .call("FileNode/get", json!({"accountId": owner_id, "ids": [folder_id]}))
+        .await;
+    assert_eq!(
+        response["list"].as_array().map(Vec::len),
+        Some(1),
+        "AL-7: the delegate can't see the folder it made: {response}"
+    );
+
     // Test 12, AL-6, AL-7: organize makes folders it can see, moves mail,
     // never deletes it
     let (_, mailboxes) = delegate