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;
32 if do_pretty_printing then
33 local ok, termcolours = pcall(require, "util.termcolours");
35 getstyle, getstring = termcolours.getstyle, termcolours.getstring;
37 do_pretty_printing = nil;
43 stanza_mt = { __type = "stanza" };
44 stanza_mt.__index = stanza_mt;
46 function stanza(name, attr)
47 local stanza = { name = name, attr = attr or {}, tags = {}, last_add = {}};
48 return setmetatable(stanza, stanza_mt);
51 function stanza_mt:query(xmlns)
52 return self:tag("query", { xmlns = xmlns });
55 function stanza_mt:body(text, attr)
56 return self:tag("body", attr):text(text);
59 function stanza_mt:tag(name, attrs)
60 local s = stanza(name, attrs);
61 (self.last_add[#self.last_add] or self):add_direct_child(s);
62 t_insert(self.last_add, s);
66 function stanza_mt:text(text)
67 (self.last_add[#self.last_add] or self):add_direct_child(text);
71 function stanza_mt:up()
72 t_remove(self.last_add);
76 function stanza_mt:reset()
77 local last_add = self.last_add;
78 for i = 1,#last_add do
84 function stanza_mt:add_direct_child(child)
85 if type(child) == "table" then
86 t_insert(self.tags, child);
88 t_insert(self, child);
91 function stanza_mt:add_child(child)
92 (self.last_add[#self.last_add] or self):add_direct_child(child);
96 function stanza_mt:get_child(name, xmlns)
97 for _, child in ipairs(self.tags) do
98 if (not name or child.name == name)
99 and ((not xmlns and self.attr.xmlns == child.attr.xmlns)
100 or child.attr.xmlns == xmlns) then
107 function stanza_mt:child_with_name(name)
108 for _, child in ipairs(self.tags) do
109 if child.name == name then return child; end
113 function stanza_mt:child_with_ns(ns)
114 for _, child in ipairs(self.tags) do
115 if child.attr.xmlns == ns then return child; end
119 function stanza_mt:children()
124 if v then return v; end
128 function stanza_mt:childtags()
132 local v = self.tags[i]
133 if v then return v; end
134 end, self.tags[1], i;
140 local escape_table = { ["'"] = "'", ["\""] = """, ["<"] = "<", [">"] = ">", ["&"] = "&" };
141 function xml_escape(str) return (s_gsub(str, "['&<>\"]", escape_table)); end
142 _M.xml_escape = xml_escape;
145 local function _dostring(t, buf, self, xml_escape, parentns)
148 t_insert(buf, "<"..name);
149 for k, v in pairs(t.attr) do
150 if s_find(k, "\1", 1, true) then
151 local ns, attrk = s_match(k, "^([^\1]*)\1?(.*)$");
153 t_insert(buf, " xmlns:ns"..nsid.."='"..xml_escape(ns).."' ".."ns"..nsid..":"..attrk.."='"..xml_escape(v).."'");
154 elseif not(k == "xmlns" and v == parentns) then
155 t_insert(buf, " "..k.."='"..xml_escape(v).."'");
166 self(child, buf, self, xml_escape, t.attr.xmlns);
168 t_insert(buf, xml_escape(child));
171 t_insert(buf, "</"..name..">");
174 function stanza_mt.__tostring(t)
176 _dostring(t, buf, _dostring, xml_escape, nil);
177 return t_concat(buf);
180 function stanza_mt.top_tag(t)
181 local attr_string = "";
183 for k, v in pairs(t.attr) do if type(k) == "string" then attr_string = attr_string .. s_format(" %s='%s'", k, xml_escape(tostring(v))); end end
185 return s_format("<%s%s>", t.name, attr_string);
188 function stanza_mt.get_text(t)
194 function stanza_mt.__add(s1, s2)
195 return s1:add_direct_child(s2);
207 function preserialize(stanza)
208 local s = { name = stanza.name, attr = stanza.attr };
209 for _, child in ipairs(stanza) do
210 if type(child) == "table" then
211 t_insert(s, preserialize(child));
219 function deserialize(stanza)
222 local attr = stanza.attr;
223 for i=1,#attr do attr[i] = nil; end
225 for att in pairs(attr) do
226 if s_find(att, "|", 1, true) and not s_find(k, "\1", 1, true) then
227 local ns,na = s_match(k, "^([^|]+)|(.+)$");
228 attrx[ns.."\1"..na] = attr[att];
232 for a,v in pairs(attrx) do
235 setmetatable(stanza, stanza_mt);
236 for _, child in ipairs(stanza) do
237 if type(child) == "table" then
241 if not stanza.tags then
244 for _, child in ipairs(stanza) do
245 if type(child) == "table" then
246 t_insert(tags, child);
250 if not stanza.last_add then
251 stanza.last_add = {};
259 function clone(stanza)
260 local lookup_table = {};
261 local function _copy(object)
262 if type(object) ~= "table" then
264 elseif lookup_table[object] then
265 return lookup_table[object];
267 local new_table = {};
268 lookup_table[object] = new_table;
269 for index, value in pairs(object) do
270 new_table[_copy(index)] = _copy(value);
272 return setmetatable(new_table, getmetatable(object));
278 function message(attr, body)
280 return stanza("message", attr);
282 return stanza("message", attr):tag("body"):text(body);
286 if attr and not attr.id then attr.id = new_id(); end
287 return stanza("iq", attr or { id = new_id() });
291 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) });
295 local xmpp_stanzas_attr = { xmlns = xmlns_stanzas };
296 function error_reply(orig, type, condition, message)
297 local t = reply(orig);
298 t.attr.type = "error";
299 t:tag("error", {type = type}) --COMPAT: Some day xmlns:stanzas goes here
300 :tag(condition, xmpp_stanzas_attr):up();
301 if (message) then t:tag("text", xmpp_stanzas_attr):text(message):up(); end
302 return t; -- stanza ready for adding app-specific errors
306 function presence(attr)
307 return stanza("presence", attr);
310 if do_pretty_printing then
311 local style_attrk = getstyle("yellow");
312 local style_attrv = getstyle("red");
313 local style_tagname = getstyle("red");
314 local style_punc = getstyle("magenta");
316 local attr_format = " "..getstring(style_attrk, "%s")..getstring(style_punc, "=")..getstring(style_attrv, "'%s'");
317 local top_tag_format = getstring(style_punc, "<")..getstring(style_tagname, "%s").."%s"..getstring(style_punc, ">");
318 --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, ">");
319 local tag_format = top_tag_format.."%s"..getstring(style_punc, "</")..getstring(style_tagname, "%s")..getstring(style_punc, ">");
320 function stanza_mt.pretty_print(t)
321 local children_text = "";
322 for n, child in ipairs(t) do
323 if type(child) == "string" then
324 children_text = children_text .. xml_escape(child);
326 children_text = children_text .. child:pretty_print();
330 local attr_string = "";
332 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
334 return s_format(tag_format, t.name, attr_string, children_text, t.name);
337 function stanza_mt.pretty_top_tag(t)
338 local attr_string = "";
340 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
342 return s_format(top_tag_format, t.name, attr_string);
345 -- Sorry, fresh out of colours for you guys ;)
346 stanza_mt.pretty_print = stanza_mt.__tostring;
347 stanza_mt.pretty_top_tag = stanza_mt.top_tag;