Permission changes

sql/get_top_level_folder.sql

@@ -0,0 +1,26 @@
+WITH
+    permitted as (
+        SELECT
+            folder_id
+        FROM
+            permissions
+        WHERE
+            user_id = $1
+    )
+SELECT
+    folder_id
+FROM
+    folders
+WHERE
+    folder_id IN (
+        SELECT
+            folder_id
+        FROM
+            permitted
+    )
+    AND parent_folder_id NOT IN (
+        SELECT
+            folder_id
+        FROM
+            permitted
+    )