util.stanza: Add stanza:get_child(name, xmlns) to find a child tag given a name/xmlns

diff --git a/util/stanza.lua b/util/stanza.lua
index d295d5cc35a5fb5453d2fd5906d79b0ec84fe2e4..8d3b7747b39dadb50ff73c98dc5bd250f34e7471 100644 (file)
--- a/util/stanza.lua
+++ b/util/stanza.lua
@@ -93,6 +93,17 @@ function stanza_mt:add_child(child)
        return self;
 end
 
+function stanza_mt:get_child(name, xmlns)
+       for _, child in ipairs(self.tags) do
+               if (not name or child.name == name) 
+                       and ((not xmlns and self.attr.xmlns == child.attr.xmlns)
+                               or child.attr.xmlns == xmlns) then
+                       
+                       return child;
+               end
+       end
+end
+
 function stanza_mt:child_with_name(name)
        for _, child in ipairs(self.tags) do    
                if child.name == name then return child; end