1 files changed, 13 insertions, 0 deletions
diff --git a/acf/model/node.lua b/acf/model/node.lua
index 3960b90..09e3d69 100644
--- a/acf/model/node.lua
+++ b/acf/model/node.lua
@@ -57,6 +57,18 @@ function TreeNode:init(context)
    function mt.__index(t, k) return mt.get(k) end
    function mt.__newindex(t, k, v) mt.set(k, v) end
 
+   function mt.has_permission(user, permission)
+      local p = permission..mt.path
+      if mt.txn:search('/auth/permissions')[p] then
+	 return user:check_permission(p)
+      end
+
+      if ({create=true, delete=true})[permission] then
+	 permission = 'modify'
+      end
+      return has_permission(mt.parent, user, permission)
+   end
+
    mt.txn.validable[mt.path] = mt.addr
 end
 
@@ -117,6 +129,7 @@ local function meta_func(attr)
 end
 
 addr = meta_func('addr')
+has_permission = meta_func('has_permission')
 members = meta_func('members')
 meta = meta_func('meta')
 mmeta = meta_func('mmeta')