1 local t_insert = table.insert;
2 local t_remove = table.remove;
3 local s_format = string.format;
4 local tostring = tostring;
5 local setmetatable = setmetatable;
11 local unpack = unpack;
12 local s_gsub = string.gsub;
15 local do_pretty_printing = not os.getenv("WINDIR");
16 local getstyle, getstring = require "util.termcolours".getstyle, require "util.termcolours".getstring;
18 local log = require "util.logger".init("stanza");
23 stanza_mt.__index = stanza_mt;
25 function stanza(name, attr)
26 local stanza = { name = name, attr = attr or {}, tags = {}, last_add = {}};
27 return setmetatable(stanza, stanza_mt);
30 function stanza_mt:query(xmlns)
31 return self:tag("query", { xmlns = xmlns });
34 function stanza_mt:body(text, attr)
35 return self:tag("body", attr):text(text);
38 function stanza_mt:tag(name, attrs)
39 local s = stanza(name, attrs);
40 (self.last_add[#self.last_add] or self):add_direct_child(s);
41 t_insert(self.last_add, s);
45 function stanza_mt:text(text)
46 (self.last_add[#self.last_add] or self):add_direct_child(text);
50 function stanza_mt:up()
51 t_remove(self.last_add);
55 function stanza_mt:add_direct_child(child)
56 if type(child) == "table" then
57 t_insert(self.tags, child);
59 t_insert(self, child);
62 function stanza_mt:add_child(child)
63 (self.last_add[#self.last_add] or self):add_direct_child(child);
67 function stanza_mt:child_with_name(name)
68 for _, child in ipairs(self) do
69 if child.name == name then return child; end
73 function stanza_mt:children()
78 if v then return v; end
82 function stanza_mt:childtags()
86 local v = self.tags[i]
87 if v then return v; end
93 local xml_entities = { ["'"] = "'", ["\""] = """, ["<"] = "<", [">"] = ">", ["&"] = "&" };
94 function xml_escape(s) return s_gsub(s, "['&<>\"]", xml_entities); end
97 local xml_escape = xml_escape;
99 function stanza_mt.__tostring(t)
100 local children_text = "";
101 for n, child in ipairs(t) do
102 if type(child) == "string" then
103 children_text = children_text .. xml_escape(child);
105 children_text = children_text .. tostring(child);
109 local attr_string = "";
111 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
113 return s_format("<%s%s>%s</%s>", t.name, attr_string, children_text, t.name);
116 function stanza_mt.top_tag(t)
117 local attr_string = "";
119 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
121 return s_format("<%s%s>", t.name, attr_string);
124 function stanza_mt.__add(s1, s2)
125 return s1:add_direct_child(s2);
137 function preserialize(stanza)
138 local s = { name = stanza.name, attr = stanza.attr };
139 for _, child in ipairs(stanza) do
140 if type(child) == "table" then
141 t_insert(s, preserialize(child));
149 function deserialize(stanza)
152 setmetatable(stanza, stanza_mt);
153 for _, child in ipairs(stanza) do
154 if type(child) == "table" then
158 if not stanza.tags then
161 for _, child in ipairs(stanza) do
162 if type(child) == "table" then
163 t_insert(tags, child);
173 function message(attr, body)
175 return stanza("message", attr);
177 return stanza("message", attr):tag("body"):text(body);
181 if attr and not attr.id then attr.id = new_id(); end
182 return stanza("iq", attr or { id = new_id() });
186 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) });
189 function error_reply(orig, type, condition, message, clone)
190 local t = reply(orig);
191 t.attr.type = "error";
193 t:tag("error", {type = type})
194 :tag(condition, {xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas"}):up();
195 if (message) then t:tag("text"):text(message):up(); end
196 return t; -- stanza ready for adding app-specific errors
199 function presence(attr)
200 return stanza("presence", attr);
203 if do_pretty_printing then
204 local style_attrk = getstyle("yellow");
205 local style_attrv = getstyle("red");
206 local style_tagname = getstyle("red");
207 local style_punc = getstyle("magenta");
209 local attr_format = " "..getstring(style_attrk, "%s")..getstring(style_punc, "=")..getstring(style_attrv, "'%s'");
210 local top_tag_format = getstring(style_punc, "<")..getstring(style_tagname, "%s").."%s"..getstring(style_punc, ">");
211 --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, ">");
212 local tag_format = top_tag_format.."%s"..getstring(style_punc, "</")..getstring(style_tagname, "%s")..getstring(style_punc, ">");
213 function stanza_mt.pretty_print(t)
214 local children_text = "";
215 for n, child in ipairs(t) do
216 if type(child) == "string" then
217 children_text = children_text .. xml_escape(child);
219 children_text = children_text .. child:pretty_print();
223 local attr_string = "";
225 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
227 return s_format(tag_format, t.name, attr_string, children_text, t.name);
230 function stanza_mt.pretty_top_tag(t)
231 local attr_string = "";
233 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
235 return s_format(top_tag_format, t.name, attr_string);
238 -- Sorry, fresh out of colours for you guys ;)
239 stanza_mt.pretty_print = stanza_mt.__tostring;
240 stanza_mt.pretty_top_tag = stanza_mt.top_tag;