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;
29 local do_pretty_printing = not os.getenv("WINDIR");
30 local getstyle, getstring = require "util.termcolours".getstyle, require "util.termcolours".getstring;
32 local log = require "util.logger".init("stanza");
37 stanza_mt.__index = stanza_mt;
39 function stanza(name, attr)
40 local stanza = { name = name, attr = attr or {}, tags = {}, last_add = {}};
41 return setmetatable(stanza, stanza_mt);
44 function stanza_mt:query(xmlns)
45 return self:tag("query", { xmlns = xmlns });
48 function stanza_mt:body(text, attr)
49 return self:tag("body", attr):text(text);
52 function stanza_mt:tag(name, attrs)
53 local s = stanza(name, attrs);
54 (self.last_add[#self.last_add] or self):add_direct_child(s);
55 t_insert(self.last_add, s);
59 function stanza_mt:text(text)
60 (self.last_add[#self.last_add] or self):add_direct_child(text);
64 function stanza_mt:up()
65 t_remove(self.last_add);
69 function stanza_mt:reset()
70 local last_add = self.last_add;
71 for i = 1,#last_add do
77 function stanza_mt:add_direct_child(child)
78 if type(child) == "table" then
79 t_insert(self.tags, child);
81 t_insert(self, child);
84 function stanza_mt:add_child(child)
85 (self.last_add[#self.last_add] or self):add_direct_child(child);
89 function stanza_mt:child_with_name(name)
90 for _, child in ipairs(self.tags) do
91 if child.name == name then return child; end
95 function stanza_mt:child_with_ns(ns)
96 for _, child in ipairs(self.tags) do
97 if child.attr.xmlns == ns then return child; end
101 function stanza_mt:children()
106 if v then return v; end
110 function stanza_mt:childtags()
114 local v = self.tags[i]
115 if v then return v; end
116 end, self.tags[1], i;
120 local xml_escape = (function()
121 local escape_table = { ["'"] = "'", ["\""] = """, ["<"] = "<", [">"] = ">", ["&"] = "&" };
122 return function(str) return (s_gsub(str, "['&<>\"]", escape_table)); end
124 local function _dostring(t, buf, self, xml_escape)
125 local nsid, ns, attrk = 0;
126 t_insert(buf, "<"..t.name);
127 for k, v in pairs(t.attr) do
128 ns, attrk = s_match(k, "^([^|]+)|(.+)$");
131 t_insert(buf, " xmlns:ns"..nsid.."='"..xml_escape(ns).."' ".."ns"..nsid..":"..attrk.."='"..xml_escape(v).."'");
133 t_insert(buf, " "..k.."='"..xml_escape(v).."'");
140 self(child, buf, self, xml_escape);
142 t_insert(buf, xml_escape(child));
145 t_insert(buf, "</"..t.name..">");
147 function stanza_mt.__tostring(t)
149 _dostring(t, buf, _dostring, xml_escape);
150 return t_concat(buf);
153 function stanza_mt.top_tag(t)
154 local attr_string = "";
156 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
158 return s_format("<%s%s>", t.name, attr_string);
161 function stanza_mt.__add(s1, s2)
162 return s1:add_direct_child(s2);
174 function preserialize(stanza)
175 local s = { name = stanza.name, attr = stanza.attr };
176 for _, child in ipairs(stanza) do
177 if type(child) == "table" then
178 t_insert(s, preserialize(child));
186 function deserialize(stanza)
189 local attr = stanza.attr;
190 for i=1,#attr do attr[i] = nil; end
191 setmetatable(stanza, stanza_mt);
192 for _, child in ipairs(stanza) do
193 if type(child) == "table" then
197 if not stanza.tags then
200 for _, child in ipairs(stanza) do
201 if type(child) == "table" then
202 t_insert(tags, child);
206 if not stanza.last_add then
207 stanza.last_add = {};
215 function clone(stanza)
216 local lookup_table = {};
217 local function _copy(object)
218 if type(object) ~= "table" then
220 elseif lookup_table[object] then
221 return lookup_table[object];
223 local new_table = {};
224 lookup_table[object] = new_table;
225 for index, value in pairs(object) do
226 new_table[_copy(index)] = _copy(value);
228 return setmetatable(new_table, getmetatable(object));
233 function message(attr, body)
235 return stanza("message", attr);
237 return stanza("message", attr):tag("body"):text(body);
241 if attr and not attr.id then attr.id = new_id(); end
242 return stanza("iq", attr or { id = new_id() });
246 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) });
249 function error_reply(orig, type, condition, message)
250 local t = reply(orig);
251 t.attr.type = "error";
252 t:tag("error", {type = type})
253 :tag(condition, {xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas"}):up();
254 if (message) then t:tag("text"):text(message):up(); end
255 return t; -- stanza ready for adding app-specific errors
258 function presence(attr)
259 return stanza("presence", attr);
262 if do_pretty_printing then
263 local style_attrk = getstyle("yellow");
264 local style_attrv = getstyle("red");
265 local style_tagname = getstyle("red");
266 local style_punc = getstyle("magenta");
268 local attr_format = " "..getstring(style_attrk, "%s")..getstring(style_punc, "=")..getstring(style_attrv, "'%s'");
269 local top_tag_format = getstring(style_punc, "<")..getstring(style_tagname, "%s").."%s"..getstring(style_punc, ">");
270 --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, ">");
271 local tag_format = top_tag_format.."%s"..getstring(style_punc, "</")..getstring(style_tagname, "%s")..getstring(style_punc, ">");
272 function stanza_mt.pretty_print(t)
273 local children_text = "";
274 for n, child in ipairs(t) do
275 if type(child) == "string" then
276 children_text = children_text .. xml_escape(child);
278 children_text = children_text .. child:pretty_print();
282 local attr_string = "";
284 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
286 return s_format(tag_format, t.name, attr_string, children_text, t.name);
289 function stanza_mt.pretty_top_tag(t)
290 local attr_string = "";
292 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
294 return s_format(top_tag_format, t.name, attr_string);
297 -- Sorry, fresh out of colours for you guys ;)
298 stanza_mt.pretty_print = stanza_mt.__tostring;
299 stanza_mt.pretty_top_tag = stanza_mt.top_tag;