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;
19 local ipairs = ipairs;
23 local unpack = unpack;
24 local s_gsub = string.gsub;
27 local do_pretty_printing = not os.getenv("WINDIR");
28 local getstyle, getstring = require "util.termcolours".getstyle, require "util.termcolours".getstring;
30 local log = require "util.logger".init("stanza");
35 stanza_mt.__index = stanza_mt;
37 function stanza(name, attr)
38 local stanza = { name = name, attr = attr or {}, tags = {}, last_add = {}};
39 return setmetatable(stanza, stanza_mt);
42 function stanza_mt:query(xmlns)
43 return self:tag("query", { xmlns = xmlns });
46 function stanza_mt:body(text, attr)
47 return self:tag("body", attr):text(text);
50 function stanza_mt:tag(name, attrs)
51 local s = stanza(name, attrs);
52 (self.last_add[#self.last_add] or self):add_direct_child(s);
53 t_insert(self.last_add, s);
57 function stanza_mt:text(text)
58 (self.last_add[#self.last_add] or self):add_direct_child(text);
62 function stanza_mt:up()
63 t_remove(self.last_add);
67 function stanza_mt:add_direct_child(child)
68 if type(child) == "table" then
69 t_insert(self.tags, child);
71 t_insert(self, child);
74 function stanza_mt:add_child(child)
75 (self.last_add[#self.last_add] or self):add_direct_child(child);
79 function stanza_mt:child_with_name(name)
80 for _, child in ipairs(self.tags) do
81 if child.name == name then return child; end
85 function stanza_mt:child_with_ns(ns)
86 for _, child in ipairs(self.tags) do
87 if child.attr.xmlns == ns then return child; end
91 function stanza_mt:children()
96 if v then return v; end
100 function stanza_mt:childtags()
104 local v = self.tags[i]
105 if v then return v; end
106 end, self.tags[1], i;
111 local xml_entities = { ["'"] = "'", ["\""] = """, ["<"] = "<", [">"] = ">", ["&"] = "&" };
112 function xml_escape(s) return s_gsub(s, "['&<>\"]", xml_entities); end
115 local xml_escape = xml_escape;
117 local function dostring(t, buf, self, xml_escape)
118 local nsid, ns, attrk = 0;
120 t_insert(buf, t.name);
121 for k, v in pairs(t.attr) do if type(k) == "string" then
123 ns, attrk = s_match(k, "^([^|]+)|(.+)$");
125 nsid = (nsid or -1) + 1;
126 t_insert(buf, "xmlns:ns"..nsid);
128 t_insert(buf, (xml_escape(tostring(ns))));
130 t_insert(buf, "ns"..nsid..":"..attrk);
135 t_insert(buf, (xml_escape(tostring(v))));
139 for n, child in ipairs(t) do
141 self(child, buf, self, xml_escape);
143 t_insert(buf, (xml_escape(child)));
147 t_insert(buf, t.name);
151 function stanza_mt.__tostring(t)
153 dostring(t, buf, dostring, xml_escape);
154 return t_concat(buf);
158 function stanza_mt.top_tag(t)
159 local attr_string = "";
161 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
163 return s_format("<%s%s>", t.name, attr_string);
166 function stanza_mt.__add(s1, s2)
167 return s1:add_direct_child(s2);
179 function preserialize(stanza)
180 local s = { name = stanza.name, attr = stanza.attr };
181 for _, child in ipairs(stanza) do
182 if type(child) == "table" then
183 t_insert(s, preserialize(child));
191 function deserialize(stanza)
194 setmetatable(stanza, stanza_mt);
195 for _, child in ipairs(stanza) do
196 if type(child) == "table" then
200 if not stanza.tags then
203 for _, child in ipairs(stanza) do
204 if type(child) == "table" then
205 t_insert(tags, child);
209 if not stanza.last_add then
210 stanza.last_add = {};
218 function message(attr, body)
220 return stanza("message", attr);
222 return stanza("message", attr):tag("body"):text(body);
226 if attr and not attr.id then attr.id = new_id(); end
227 return stanza("iq", attr or { id = new_id() });
231 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) });
234 function error_reply(orig, type, condition, message, clone)
235 local t = reply(orig);
236 t.attr.type = "error";
238 t:tag("error", {type = type})
239 :tag(condition, {xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas"}):up();
240 if (message) then t:tag("text"):text(message):up(); end
241 return t; -- stanza ready for adding app-specific errors
244 function presence(attr)
245 return stanza("presence", attr);
248 if do_pretty_printing then
249 local style_attrk = getstyle("yellow");
250 local style_attrv = getstyle("red");
251 local style_tagname = getstyle("red");
252 local style_punc = getstyle("magenta");
254 local attr_format = " "..getstring(style_attrk, "%s")..getstring(style_punc, "=")..getstring(style_attrv, "'%s'");
255 local top_tag_format = getstring(style_punc, "<")..getstring(style_tagname, "%s").."%s"..getstring(style_punc, ">");
256 --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, ">");
257 local tag_format = top_tag_format.."%s"..getstring(style_punc, "</")..getstring(style_tagname, "%s")..getstring(style_punc, ">");
258 function stanza_mt.pretty_print(t)
259 local children_text = "";
260 for n, child in ipairs(t) do
261 if type(child) == "string" then
262 children_text = children_text .. xml_escape(child);
264 children_text = children_text .. child:pretty_print();
268 local attr_string = "";
270 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
272 return s_format(tag_format, t.name, attr_string, children_text, t.name);
275 function stanza_mt.pretty_top_tag(t)
276 local attr_string = "";
278 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
280 return s_format(top_tag_format, t.name, attr_string);
283 -- Sorry, fresh out of colours for you guys ;)
284 stanza_mt.pretty_print = stanza_mt.__tostring;
285 stanza_mt.pretty_top_tag = stanza_mt.top_tag;