2 -- Copyright (C) 2008 Matthew Wild
3 -- Copyright (C) 2008 Waqas Hussain
5 -- This program is free software; you can redistribute it and/or
6 -- modify it under the terms of the GNU General Public License
7 -- as published by the Free Software Foundation; either version 2
8 -- of the License, or (at your option) any later version.
10 -- This program is distributed in the hope that it will be useful,
11 -- but WITHOUT ANY WARRANTY; without even the implied warranty of
12 -- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 -- GNU General Public License for more details.
15 -- You should have received a copy of the GNU General Public License
16 -- along with this program; if not, write to the Free Software
17 -- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
21 local t_insert = table.insert;
22 local t_concat = table.concat;
23 local t_remove = table.remove;
24 local t_concat = table.concat;
25 local s_format = string.format;
26 local tostring = tostring;
27 local setmetatable = setmetatable;
29 local ipairs = ipairs;
33 local unpack = unpack;
34 local s_gsub = string.gsub;
37 local do_pretty_printing = not os.getenv("WINDIR");
38 local getstyle, getstring = require "util.termcolours".getstyle, require "util.termcolours".getstring;
40 local log = require "util.logger".init("stanza");
45 stanza_mt.__index = stanza_mt;
47 function stanza(name, attr)
48 local stanza = { name = name, attr = attr or {}, tags = {}, last_add = {}};
49 return setmetatable(stanza, stanza_mt);
52 function stanza_mt:query(xmlns)
53 return self:tag("query", { xmlns = xmlns });
56 function stanza_mt:body(text, attr)
57 return self:tag("body", attr):text(text);
60 function stanza_mt:tag(name, attrs)
61 local s = stanza(name, attrs);
62 (self.last_add[#self.last_add] or self):add_direct_child(s);
63 t_insert(self.last_add, s);
67 function stanza_mt:text(text)
68 (self.last_add[#self.last_add] or self):add_direct_child(text);
72 function stanza_mt:up()
73 t_remove(self.last_add);
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) do
91 if child.name == name then return child; end
95 function stanza_mt:children()
100 if v then return v; end
104 function stanza_mt:childtags()
108 local v = self.tags[i]
109 if v then return v; end
110 end, self.tags[1], i;
115 local xml_entities = { ["'"] = "'", ["\""] = """, ["<"] = "<", [">"] = ">", ["&"] = "&" };
116 function xml_escape(s) return s_gsub(s, "['&<>\"]", xml_entities); end
119 local xml_escape = xml_escape;
121 local function dostring(t, buf, self, xml_escape)
123 t_insert(buf, t.name);
124 for k, v in pairs(t.attr) do if type(k) == "string" then
128 t_insert(buf, (xml_escape(tostring(v))));
132 for n, child in ipairs(t) do
134 self(child, buf, self, xml_escape);
136 t_insert(buf, (xml_escape(child)));
140 t_insert(buf, t.name);
144 function stanza_mt.__tostring(t)
146 dostring(t, buf, dostring, xml_escape);
147 return t_concat(buf);
151 function stanza_mt.top_tag(t)
152 local attr_string = "";
154 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
156 return s_format("<%s%s>", t.name, attr_string);
159 function stanza_mt.__add(s1, s2)
160 return s1:add_direct_child(s2);
172 function preserialize(stanza)
173 local s = { name = stanza.name, attr = stanza.attr };
174 for _, child in ipairs(stanza) do
175 if type(child) == "table" then
176 t_insert(s, preserialize(child));
184 function deserialize(stanza)
187 setmetatable(stanza, stanza_mt);
188 for _, child in ipairs(stanza) do
189 if type(child) == "table" then
193 if not stanza.tags then
196 for _, child in ipairs(stanza) do
197 if type(child) == "table" then
198 t_insert(tags, child);
202 if not stanza.last_add then
203 stanza.last_add = {};
211 function message(attr, body)
213 return stanza("message", attr);
215 return stanza("message", attr):tag("body"):text(body);
219 if attr and not attr.id then attr.id = new_id(); end
220 return stanza("iq", attr or { id = new_id() });
224 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) });
227 function error_reply(orig, type, condition, message, clone)
228 local t = reply(orig);
229 t.attr.type = "error";
231 t:tag("error", {type = type})
232 :tag(condition, {xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas"}):up();
233 if (message) then t:tag("text"):text(message):up(); end
234 return t; -- stanza ready for adding app-specific errors
237 function presence(attr)
238 return stanza("presence", attr);
241 if do_pretty_printing then
242 local style_attrk = getstyle("yellow");
243 local style_attrv = getstyle("red");
244 local style_tagname = getstyle("red");
245 local style_punc = getstyle("magenta");
247 local attr_format = " "..getstring(style_attrk, "%s")..getstring(style_punc, "=")..getstring(style_attrv, "'%s'");
248 local top_tag_format = getstring(style_punc, "<")..getstring(style_tagname, "%s").."%s"..getstring(style_punc, ">");
249 --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, ">");
250 local tag_format = top_tag_format.."%s"..getstring(style_punc, "</")..getstring(style_tagname, "%s")..getstring(style_punc, ">");
251 function stanza_mt.pretty_print(t)
252 local children_text = "";
253 for n, child in ipairs(t) do
254 if type(child) == "string" then
255 children_text = children_text .. xml_escape(child);
257 children_text = children_text .. child:pretty_print();
261 local attr_string = "";
263 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
265 return s_format(tag_format, t.name, attr_string, children_text, t.name);
268 function stanza_mt.pretty_top_tag(t)
269 local attr_string = "";
271 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
273 return s_format(top_tag_format, t.name, attr_string);
276 -- Sorry, fresh out of colours for you guys ;)
277 stanza_mt.pretty_print = stanza_mt.__tostring;
278 stanza_mt.pretty_top_tag = stanza_mt.top_tag;