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authorKim Alvefur <zash@zash.se>2013-04-04 20:05:35 +0200
committerKim Alvefur <zash@zash.se>2013-04-04 20:05:35 +0200
commitbd72dc3f8816eba31da05ade9c5ed8478571515b (patch)
treeb7dd186cce303172684161b4fbab54ca40cc1ec1
parent28f67a802231d1daa8dfe046064d61c3fdbb6a88 (diff)
downloadprosody-bd72dc3f8816eba31da05ade9c5ed8478571515b.tar.gz
prosody-bd72dc3f8816eba31da05ade9c5ed8478571515b.zip
util.stanza: Add stanza:find(), a light weight XPath-like method
-rw-r--r--util/stanza.lua26
1 files changed, 26 insertions, 0 deletions
diff --git a/util/stanza.lua b/util/stanza.lua
index 213ed506..59c88c4e 100644
--- a/util/stanza.lua
+++ b/util/stanza.lua
@@ -18,6 +18,7 @@ local pairs = pairs;
local ipairs = ipairs;
local type = type;
local s_gsub = string.gsub;
+local s_sub = string.sub;
local s_find = string.find;
local os = os;
@@ -174,6 +175,31 @@ function stanza_mt:maptags(callback)
return self;
end
+function stanza_mt:find(path)
+ local pos = 1;
+ local len = #path + 1;
+
+ repeat
+ local xmlns, name, text;
+ local char = s_sub(path, pos, pos);
+ if char == "@" then
+ return self.attr[s_sub(path, pos + 1)];
+ elseif char == "{" then
+ xmlns, pos = s_match(path, "^([^}]+)}()", pos + 1);
+ end
+ name, text, pos = s_match(path, "^([^@/#]*)([/#]?)()", pos);
+ name = name ~= "" and name or nil;
+ if pos == len then
+ if text == "#" then
+ return self:get_child_text(name, xmlns);
+ end
+ return self:get_child(name, xmlns);
+ end
+ self = self:get_child(name, xmlns);
+ until not self
+end
+
+
local xml_escape
do
local escape_table = { ["'"] = "&apos;", ["\""] = "&quot;", ["<"] = "&lt;", [">"] = "&gt;", ["&"] = "&amp;" };