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 tostring = tostring;
16 local setmetatable = setmetatable;
18 local ipairs = ipairs;
22 local unpack = unpack;
23 local s_gsub = string.gsub;
26 local do_pretty_printing = not os.getenv("WINDIR");
27 local getstyle, getstring = require "util.termcolours".getstyle, require "util.termcolours".getstring;
29 local log = require "util.logger".init("stanza");
34 stanza_mt.__index = stanza_mt;
36 function stanza(name, attr)
37 local stanza = { name = name, attr = attr or {}, tags = {}, last_add = {}};
38 return setmetatable(stanza, stanza_mt);
41 function stanza_mt:query(xmlns)
42 return self:tag("query", { xmlns = xmlns });
45 function stanza_mt:body(text, attr)
46 return self:tag("body", attr):text(text);
49 function stanza_mt:tag(name, attrs)
50 local s = stanza(name, attrs);
51 (self.last_add[#self.last_add] or self):add_direct_child(s);
52 t_insert(self.last_add, s);
56 function stanza_mt:text(text)
57 (self.last_add[#self.last_add] or self):add_direct_child(text);
61 function stanza_mt:up()
62 t_remove(self.last_add);
66 function stanza_mt:add_direct_child(child)
67 if type(child) == "table" then
68 t_insert(self.tags, child);
70 t_insert(self, child);
73 function stanza_mt:add_child(child)
74 (self.last_add[#self.last_add] or self):add_direct_child(child);
78 function stanza_mt:child_with_name(name)
79 for _, child in ipairs(self.tags) do
80 if child.name == name then return child; end
84 function stanza_mt:child_with_ns(ns)
85 for _, child in ipairs(self.tags) do
86 if child.attr.xmlns == ns then return child; end
90 function stanza_mt:children()
95 if v then return v; end
99 function stanza_mt:childtags()
103 local v = self.tags[i]
104 if v then return v; end
105 end, self.tags[1], i;
110 local xml_entities = { ["'"] = "'", ["\""] = """, ["<"] = "<", [">"] = ">", ["&"] = "&" };
111 function xml_escape(s) return s_gsub(s, "['&<>\"]", xml_entities); end
114 local xml_escape = xml_escape;
116 local function dostring(t, buf, self, xml_escape)
118 t_insert(buf, t.name);
119 for k, v in pairs(t.attr) do if type(k) == "string" then
123 t_insert(buf, (xml_escape(tostring(v))));
127 for n, child in ipairs(t) do
129 self(child, buf, self, xml_escape);
131 t_insert(buf, (xml_escape(child)));
135 t_insert(buf, t.name);
139 function stanza_mt.__tostring(t)
141 dostring(t, buf, dostring, xml_escape);
142 return t_concat(buf);
146 function stanza_mt.top_tag(t)
147 local attr_string = "";
149 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
151 return s_format("<%s%s>", t.name, attr_string);
154 function stanza_mt.__add(s1, s2)
155 return s1:add_direct_child(s2);
167 function preserialize(stanza)
168 local s = { name = stanza.name, attr = stanza.attr };
169 for _, child in ipairs(stanza) do
170 if type(child) == "table" then
171 t_insert(s, preserialize(child));
179 function deserialize(stanza)
182 setmetatable(stanza, stanza_mt);
183 for _, child in ipairs(stanza) do
184 if type(child) == "table" then
188 if not stanza.tags then
191 for _, child in ipairs(stanza) do
192 if type(child) == "table" then
193 t_insert(tags, child);
197 if not stanza.last_add then
198 stanza.last_add = {};
206 function message(attr, body)
208 return stanza("message", attr);
210 return stanza("message", attr):tag("body"):text(body);
214 if attr and not attr.id then attr.id = new_id(); end
215 return stanza("iq", attr or { id = new_id() });
219 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) });
222 function error_reply(orig, type, condition, message, clone)
223 local t = reply(orig);
224 t.attr.type = "error";
226 t:tag("error", {type = type})
227 :tag(condition, {xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas"}):up();
228 if (message) then t:tag("text"):text(message):up(); end
229 return t; -- stanza ready for adding app-specific errors
232 function presence(attr)
233 return stanza("presence", attr);
236 if do_pretty_printing then
237 local style_attrk = getstyle("yellow");
238 local style_attrv = getstyle("red");
239 local style_tagname = getstyle("red");
240 local style_punc = getstyle("magenta");
242 local attr_format = " "..getstring(style_attrk, "%s")..getstring(style_punc, "=")..getstring(style_attrv, "'%s'");
243 local top_tag_format = getstring(style_punc, "<")..getstring(style_tagname, "%s").."%s"..getstring(style_punc, ">");
244 --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, ">");
245 local tag_format = top_tag_format.."%s"..getstring(style_punc, "</")..getstring(style_tagname, "%s")..getstring(style_punc, ">");
246 function stanza_mt.pretty_print(t)
247 local children_text = "";
248 for n, child in ipairs(t) do
249 if type(child) == "string" then
250 children_text = children_text .. xml_escape(child);
252 children_text = children_text .. child:pretty_print();
256 local attr_string = "";
258 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
260 return s_format(tag_format, t.name, attr_string, children_text, t.name);
263 function stanza_mt.pretty_top_tag(t)
264 local attr_string = "";
266 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
268 return s_format(top_tag_format, t.name, attr_string);
271 -- Sorry, fresh out of colours for you guys ;)
272 stanza_mt.pretty_print = stanza_mt.__tostring;
273 stanza_mt.pretty_top_tag = stanza_mt.top_tag;