From: Jo-Philipp Wich <jow@openwrt.org>
Date: Tue, 25 Oct 2011 22:48:43 +0000 (+0000)
Subject: libs/web: dispatcher: implement a "firstchild()" target which simply redirects to... 
X-Git-Tag: 0.11.0~1488
X-Git-Url: https://git.archive.openwrt.org/?p=project%2Fluci.git;a=commitdiff_plain;h=6021cf3bdffaff58636e181fccf2343b0cf6a790

libs/web: dispatcher: implement a "firstchild()" target which simply redirects to the first child of a node, useful for menus that are empty by default and may gain arbritary childs
---

diff --git a/libs/web/luasrc/dispatcher.lua b/libs/web/luasrc/dispatcher.lua
index 9bfa413cf..5f893dad9 100644
--- a/libs/web/luasrc/dispatcher.lua
+++ b/libs/web/luasrc/dispatcher.lua
@@ -638,6 +638,35 @@ end
 
 -- Subdispatchers --
 
+function _firstchild()
+   local path = { unpack(context.path) }
+   local name = table.concat(path, ".")
+   local node = context.treecache[name]
+
+   local lowest
+   if node and node.nodes and next(node.nodes) then
+	  local k, v
+	  for k, v in pairs(node.nodes) do
+		 if not lowest or
+			(v.order or 100) < (node.nodes[lowest].order or 100)
+		 then
+			lowest = k
+		 end
+	  end
+   end
+
+   assert(lowest ~= nil,
+		  "The requested node contains no childs, unable to redispatch")
+
+   path[#path+1] = lowest
+   dispatch(path)
+end
+
+--- Alias the first (lowest order) page automatically
+function firstchild()
+   return { type = "firstchild", target = _firstchild }
+end
+
 --- Create a redirect to another dispatching node.
 -- @param	...		Virtual path destination
 function alias(...)