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mod_muc: Room history
759 | 1 | -- Prosody IM v0.3 |
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2 | -- Copyright (C) 2008-2009 Matthew Wild |
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3 | -- Copyright (C) 2008-2009 Waqas Hussain |
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4 | -- |
758 | 5 | -- This project is MIT/X11 licensed. Please see the |
6 | -- COPYING file in the source package for more information. | |
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7 | -- |
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8 | |
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9 | |
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10 | local t_insert = table.insert; |
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11 | local t_concat = table.concat; |
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12 | local t_remove = table.remove; |
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13 | local t_concat = table.concat; |
23 | 14 | local s_format = string.format; |
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15 | local tostring = tostring; |
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16 | local setmetatable = setmetatable; |
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17 | local pairs = pairs; |
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18 | local ipairs = ipairs; |
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19 | local type = type; |
145 | 20 | local next = next; |
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21 | local print = print; |
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22 | local unpack = unpack; |
4 | 23 | local s_gsub = string.gsub; |
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24 | local os = os; |
145 | 25 | |
262 | 26 | local do_pretty_printing = not os.getenv("WINDIR"); |
27 | local getstyle, getstring = require "util.termcolours".getstyle, require "util.termcolours".getstring; | |
28 | ||
145 | 29 | local log = require "util.logger".init("stanza"); |
30 | ||
0 | 31 | module "stanza" |
32 | ||
33 | stanza_mt = {}; | |
34 | stanza_mt.__index = stanza_mt; | |
35 | ||
36 | function stanza(name, attr) | |
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37 | local stanza = { name = name, attr = attr or {}, tags = {}, last_add = {}}; |
0 | 38 | return setmetatable(stanza, stanza_mt); |
39 | end | |
40 | ||
41 | function stanza_mt:query(xmlns) | |
42 | return self:tag("query", { xmlns = xmlns }); | |
43 | end | |
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44 | |
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45 | function stanza_mt:body(text, attr) |
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46 | return self:tag("body", attr):text(text); |
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47 | end |
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48 | |
0 | 49 | function stanza_mt:tag(name, attrs) |
50 | local s = stanza(name, attrs); | |
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51 | (self.last_add[#self.last_add] or self):add_direct_child(s); |
0 | 52 | t_insert(self.last_add, s); |
53 | return self; | |
54 | end | |
55 | ||
56 | function stanza_mt:text(text) | |
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57 | (self.last_add[#self.last_add] or self):add_direct_child(text); |
0 | 58 | return self; |
59 | end | |
60 | ||
61 | function stanza_mt:up() | |
62 | t_remove(self.last_add); | |
63 | return self; | |
64 | end | |
65 | ||
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66 | function stanza_mt:add_direct_child(child) |
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67 | if type(child) == "table" then |
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68 | t_insert(self.tags, child); |
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69 | end |
0 | 70 | t_insert(self, child); |
71 | end | |
72 | ||
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73 | function stanza_mt:add_child(child) |
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74 | (self.last_add[#self.last_add] or self):add_direct_child(child); |
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75 | return self; |
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76 | end |
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77 | |
0 | 78 | function stanza_mt:child_with_name(name) |
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79 | for _, child in ipairs(self.tags) do |
0 | 80 | if child.name == name then return child; end |
81 | end | |
82 | end | |
83 | ||
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84 | function stanza_mt:child_with_ns(ns) |
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85 | for _, child in ipairs(self.tags) do |
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86 | if child.attr.xmlns == ns then return child; end |
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87 | end |
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88 | end |
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89 | |
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90 | function stanza_mt:children() |
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91 | local i = 0; |
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92 | return function (a) |
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93 | i = i + 1 |
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94 | local v = a[i] |
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95 | if v then return v; end |
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96 | end, self, i; |
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97 | |
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98 | end |
2 | 99 | function stanza_mt:childtags() |
100 | local i = 0; | |
101 | return function (a) | |
102 | i = i + 1 | |
103 | local v = self.tags[i] | |
104 | if v then return v; end | |
105 | end, self.tags[1], i; | |
106 | ||
107 | end | |
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108 | |
4 | 109 | do |
110 | local xml_entities = { ["'"] = "'", ["\""] = """, ["<"] = "<", [">"] = ">", ["&"] = "&" }; | |
111 | function xml_escape(s) return s_gsub(s, "['&<>\"]", xml_entities); end | |
112 | end | |
113 | ||
114 | local xml_escape = xml_escape; | |
115 | ||
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116 | local function dostring(t, buf, self, xml_escape) |
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117 | t_insert(buf, "<"); |
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118 | t_insert(buf, t.name); |
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119 | for k, v in pairs(t.attr) do if type(k) == "string" then |
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120 | t_insert(buf, " "); |
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121 | t_insert(buf, k); |
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122 | t_insert(buf, "='"); |
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123 | t_insert(buf, (xml_escape(tostring(v)))); |
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124 | t_insert(buf, "'"); |
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125 | end end |
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126 | t_insert(buf, ">"); |
0 | 127 | for n, child in ipairs(t) do |
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128 | if child.name then |
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129 | self(child, buf, self, xml_escape); |
4 | 130 | else |
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131 | t_insert(buf, (xml_escape(child))); |
4 | 132 | end |
0 | 133 | end |
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134 | t_insert(buf, "</"); |
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135 | t_insert(buf, t.name); |
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136 | t_insert(buf, ">"); |
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137 | end |
0 | 138 | |
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139 | function stanza_mt.__tostring(t) |
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140 | local buf = {}; |
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141 | dostring(t, buf, dostring, xml_escape); |
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142 | return t_concat(buf); |
0 | 143 | end |
144 | ||
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145 | |
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146 | function stanza_mt.top_tag(t) |
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147 | local attr_string = ""; |
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148 | if t.attr then |
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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 |
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150 | end |
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151 | return s_format("<%s%s>", t.name, attr_string); |
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152 | end |
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153 | |
0 | 154 | function stanza_mt.__add(s1, s2) |
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155 | return s1:add_direct_child(s2); |
0 | 156 | end |
157 | ||
158 | ||
159 | do | |
160 | local id = 0; | |
161 | function new_id() | |
162 | id = id + 1; | |
163 | return "lx"..id; | |
164 | end | |
165 | end | |
166 | ||
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167 | function preserialize(stanza) |
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168 | local s = { name = stanza.name, attr = stanza.attr }; |
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169 | for _, child in ipairs(stanza) do |
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170 | if type(child) == "table" then |
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171 | t_insert(s, preserialize(child)); |
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172 | else |
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173 | t_insert(s, child); |
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174 | end |
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175 | end |
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176 | return s; |
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177 | end |
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178 | |
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179 | function deserialize(stanza) |
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180 | -- Set metatable |
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181 | if stanza then |
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182 | setmetatable(stanza, stanza_mt); |
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183 | for _, child in ipairs(stanza) do |
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184 | if type(child) == "table" then |
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185 | deserialize(child); |
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186 | end |
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187 | end |
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188 | if not stanza.tags then |
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189 | -- Rebuild tags |
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190 | local tags = {}; |
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191 | for _, child in ipairs(stanza) do |
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192 | if type(child) == "table" then |
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193 | t_insert(tags, child); |
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194 | end |
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195 | end |
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196 | stanza.tags = tags; |
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197 | if not stanza.last_add then |
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198 | stanza.last_add = {}; |
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199 | end |
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200 | end |
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201 | end |
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202 | |
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203 | return stanza; |
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204 | end |
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205 | |
0 | 206 | function message(attr, body) |
207 | if not body then | |
208 | return stanza("message", attr); | |
209 | else | |
210 | return stanza("message", attr):tag("body"):text(body); | |
211 | end | |
212 | end | |
213 | function iq(attr) | |
214 | if attr and not attr.id then attr.id = new_id(); end | |
215 | return stanza("iq", attr or { id = new_id() }); | |
216 | end | |
217 | ||
218 | function reply(orig) | |
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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) }); |
0 | 220 | end |
221 | ||
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222 | function error_reply(orig, type, condition, message, clone) |
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223 | local t = reply(orig); |
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224 | t.attr.type = "error"; |
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225 | -- TODO use clone |
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226 | t:tag("error", {type = type}) |
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227 | :tag(condition, {xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas"}):up(); |
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228 | if (message) then t:tag("text"):text(message):up(); end |
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229 | return t; -- stanza ready for adding app-specific errors |
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230 | end |
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231 | |
0 | 232 | function presence(attr) |
233 | return stanza("presence", attr); | |
234 | end | |
235 | ||
262 | 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"); | |
241 | ||
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); | |
251 | else | |
252 | children_text = children_text .. child:pretty_print(); | |
253 | end | |
254 | end | |
255 | ||
256 | local attr_string = ""; | |
257 | if t.attr then | |
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 | |
259 | end | |
260 | return s_format(tag_format, t.name, attr_string, children_text, t.name); | |
261 | end | |
262 | ||
263 | function stanza_mt.pretty_top_tag(t) | |
264 | local attr_string = ""; | |
265 | if t.attr then | |
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 | |
267 | end | |
268 | return s_format(top_tag_format, t.name, attr_string); | |
269 | end | |
270 | else | |
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; | |
274 | end | |
275 | ||
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276 | return _M; |