1 local t_insert = table.insert;
2 local t_remove = table.remove;
3 local s_format = string.format;
4 local tostring = tostring;
5 local setmetatable = setmetatable;
9 local s_gsub = string.gsub;
13 stanza_mt.__index = stanza_mt;
15 function stanza(name, attr)
16 local stanza = { name = name, attr = attr or {}, tags = {}, last_add = {}};
17 return setmetatable(stanza, stanza_mt);
20 function stanza_mt:iq(attrs)
21 return self + stanza("iq", attrs)
23 function stanza_mt:message(attrs)
24 return self + stanza("message", attrs)
26 function stanza_mt:presence(attrs)
27 return self + stanza("presence", attrs)
29 function stanza_mt:query(xmlns)
30 return self:tag("query", { xmlns = xmlns });
32 function stanza_mt:tag(name, attrs)
33 local s = stanza(name, attrs);
34 (self.last_add[#self.last_add] or self):add_child(s);
35 t_insert(self.last_add, s);
39 function stanza_mt:text(text)
40 (self.last_add[#self.last_add] or self):add_child(text);
44 function stanza_mt:up()
45 t_remove(self.last_add);
49 function stanza_mt:add_child(child)
50 if type(child) == "table" then
51 t_insert(self.tags, child);
53 t_insert(self, child);
56 function stanza_mt:child_with_name(name)
57 for _, child in ipairs(self) do
58 if child.name == name then return child; end
62 function stanza_mt:children()
67 if v then return v; end
71 function stanza_mt:childtags()
75 local v = self.tags[i]
76 if v then return v; end
82 local xml_entities = { ["'"] = "'", ["\""] = """, ["<"] = "<", [">"] = ">", ["&"] = "&" };
83 function xml_escape(s) return s_gsub(s, "['&<>\"]", xml_entities); end
86 local xml_escape = xml_escape;
88 function stanza_mt.__tostring(t)
89 local children_text = "";
90 for n, child in ipairs(t) do
91 if type(child) == "string" then
92 children_text = children_text .. xml_escape(child);
94 children_text = children_text .. tostring(child);
98 local attr_string = "";
100 for k, v in pairs(t.attr) do if type(k) == "string" then attr_string = attr_string .. s_format(" %s='%s'", k, tostring(v)); end end
103 return s_format("<%s%s>%s</%s>", t.name, attr_string, children_text, t.name);
106 function stanza_mt.__add(s1, s2)
107 return s1:add_child(s2);
119 function message(attr, body)
121 return stanza("message", attr);
123 return stanza("message", attr):tag("body"):text(body);
127 if attr and not attr.id then attr.id = new_id(); end
128 return stanza("iq", attr or { id = new_id() });
132 return stanza(orig.name, orig.attr and { to = orig.attr.from, from = orig.attr.to, id = orig.attr.id, type = ((orig.name == "iq" and "result") or nil) });
135 function presence(attr)
136 return stanza("presence", attr);