2 -- Copyright (C) 2008-2009 Matthew Wild
3 -- Copyright (C) 2008-2009 Waqas Hussain
5 -- This project is MIT/X11 licensed. Please see the
6 -- COPYING file in the source package for more information.
10 local t_insert = table.insert;
11 local t_concat = table.concat;
12 local t_remove = table.remove;
13 local t_concat = table.concat;
14 local s_format = string.format;
15 local s_match = string.match;
16 local tostring = tostring;
17 local setmetatable = setmetatable;
18 local getmetatable = getmetatable;
20 local ipairs = ipairs;
24 local unpack = unpack;
25 local s_gsub = string.gsub;
26 local s_char = string.char;
27 local s_find = string.find;
30 local do_pretty_printing = not os.getenv("WINDIR");
31 local getstyle, getstring = require "util.termcolours".getstyle, require "util.termcolours".getstring;
33 local log = require "util.logger".init("stanza");
38 stanza_mt.__index = stanza_mt;
40 function stanza(name, attr)
41 local stanza = { name = name, attr = attr or {}, tags = {}, last_add = {}};
42 return setmetatable(stanza, stanza_mt);
45 function stanza_mt:query(xmlns)
46 return self:tag("query", { xmlns = xmlns });
49 function stanza_mt:body(text, attr)
50 return self:tag("body", attr):text(text);
53 function stanza_mt:tag(name, attrs)
54 local s = stanza(name, attrs);
55 (self.last_add[#self.last_add] or self):add_direct_child(s);
56 t_insert(self.last_add, s);
60 function stanza_mt:text(text)
61 (self.last_add[#self.last_add] or self):add_direct_child(text);
65 function stanza_mt:up()
66 t_remove(self.last_add);
70 function stanza_mt:reset()
71 local last_add = self.last_add;
72 for i = 1,#last_add do
78 function stanza_mt:add_direct_child(child)
79 if type(child) == "table" then
80 t_insert(self.tags, child);
82 t_insert(self, child);
85 function stanza_mt:add_child(child)
86 (self.last_add[#self.last_add] or self):add_direct_child(child);
90 function stanza_mt:child_with_name(name)
91 for _, child in ipairs(self.tags) do
92 if child.name == name then return child; end
96 function stanza_mt:child_with_ns(ns)
97 for _, child in ipairs(self.tags) do
98 if child.attr.xmlns == ns then return child; end
102 function stanza_mt:children()
107 if v then return v; end
111 function stanza_mt:childtags()
115 local v = self.tags[i]
116 if v then return v; end
117 end, self.tags[1], i;
121 local xml_escape = (function()
122 local escape_table = { ["'"] = "'", ["\""] = """, ["<"] = "<", [">"] = ">", ["&"] = "&" };
123 return function(str) return (s_gsub(str, "['&<>\"]", escape_table)); end
125 local function _dostring(t, buf, self, xml_escape)
128 t_insert(buf, "<"..name);
129 for k, v in pairs(t.attr) do
130 if s_find(k, "|", 1, true) then
131 local ns, attrk = s_match(k, "^([^|]+)|(.+)$");
133 t_insert(buf, " xmlns:ns"..nsid.."='"..xml_escape(ns).."' ".."ns"..nsid..":"..attrk.."='"..xml_escape(v).."'");
135 t_insert(buf, " "..k.."='"..xml_escape(v).."'");
146 self(child, buf, self, xml_escape);
148 t_insert(buf, xml_escape(child));
151 t_insert(buf, "</"..name..">");
154 function stanza_mt.__tostring(t)
156 _dostring(t, buf, _dostring, xml_escape);
157 return t_concat(buf);
160 function stanza_mt.top_tag(t)
161 local attr_string = "";
163 for k, v in pairs(t.attr) do if type(k) == "string" then attr_string = attr_string .. s_format(" %s='%s'", k, xml_escape(tostring(v))); end end
165 return s_format("<%s%s>", t.name, attr_string);
168 function stanza_mt.get_text(t)
174 function stanza_mt.__add(s1, s2)
175 return s1:add_direct_child(s2);
187 function preserialize(stanza)
188 local s = { name = stanza.name, attr = stanza.attr };
189 for _, child in ipairs(stanza) do
190 if type(child) == "table" then
191 t_insert(s, preserialize(child));
199 function deserialize(stanza)
202 local attr = stanza.attr;
203 for i=1,#attr do attr[i] = nil; end
204 setmetatable(stanza, stanza_mt);
205 for _, child in ipairs(stanza) do
206 if type(child) == "table" then
210 if not stanza.tags then
213 for _, child in ipairs(stanza) do
214 if type(child) == "table" then
215 t_insert(tags, child);
219 if not stanza.last_add then
220 stanza.last_add = {};
228 function clone(stanza)
229 local lookup_table = {};
230 local function _copy(object)
231 if type(object) ~= "table" then
233 elseif lookup_table[object] then
234 return lookup_table[object];
236 local new_table = {};
237 lookup_table[object] = new_table;
238 for index, value in pairs(object) do
239 new_table[_copy(index)] = _copy(value);
241 return setmetatable(new_table, getmetatable(object));
247 function message(attr, body)
249 return stanza("message", attr);
251 return stanza("message", attr):tag("body"):text(body);
255 if attr and not attr.id then attr.id = new_id(); end
256 return stanza("iq", attr or { id = new_id() });
260 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 orig.attr.type) });
263 function error_reply(orig, type, condition, message)
264 local t = reply(orig);
265 t.attr.type = "error";
266 t:tag("error", {type = type})
267 :tag(condition, {xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas"}):up();
268 if (message) then t:tag("text"):text(message):up(); end
269 return t; -- stanza ready for adding app-specific errors
272 function presence(attr)
273 return stanza("presence", attr);
276 if do_pretty_printing then
277 local style_attrk = getstyle("yellow");
278 local style_attrv = getstyle("red");
279 local style_tagname = getstyle("red");
280 local style_punc = getstyle("magenta");
282 local attr_format = " "..getstring(style_attrk, "%s")..getstring(style_punc, "=")..getstring(style_attrv, "'%s'");
283 local top_tag_format = getstring(style_punc, "<")..getstring(style_tagname, "%s").."%s"..getstring(style_punc, ">");
284 --local tag_format = getstring(style_punc, "<")..getstring(style_tagname, "%s").."%s"..getstring(style_punc, ">").."%s"..getstring(style_punc, "</")..getstring(style_tagname, "%s")..getstring(style_punc, ">");
285 local tag_format = top_tag_format.."%s"..getstring(style_punc, "</")..getstring(style_tagname, "%s")..getstring(style_punc, ">");
286 function stanza_mt.pretty_print(t)
287 local children_text = "";
288 for n, child in ipairs(t) do
289 if type(child) == "string" then
290 children_text = children_text .. xml_escape(child);
292 children_text = children_text .. child:pretty_print();
296 local attr_string = "";
298 for k, v in pairs(t.attr) do if type(k) == "string" then attr_string = attr_string .. s_format(attr_format, k, tostring(v)); end end
300 return s_format(tag_format, t.name, attr_string, children_text, t.name);
303 function stanza_mt.pretty_top_tag(t)
304 local attr_string = "";
306 for k, v in pairs(t.attr) do if type(k) == "string" then attr_string = attr_string .. s_format(attr_format, k, tostring(v)); end end
308 return s_format(top_tag_format, t.name, attr_string);
311 -- Sorry, fresh out of colours for you guys ;)
312 stanza_mt.pretty_print = stanza_mt.__tostring;
313 stanza_mt.pretty_top_tag = stanza_mt.top_tag;