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util/stanza.lua @ 1336:389b4fb48901
Automated merge with http://waqas.ath.cx:8000/
author | Matthew Wild <mwild1@gmail.com> |
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date | Fri, 12 Jun 2009 11:21:25 +0100 |
parent | 1151:8096941b6734 |
child | 1415:957a81b72cb2 |
rev | line source |
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896 | 1 -- Prosody IM v0.4 |
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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 s_match = string.match; |
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16 local tostring = tostring; |
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17 local setmetatable = setmetatable; |
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18 local getmetatable = getmetatable; |
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19 local pairs = pairs; |
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20 local ipairs = ipairs; |
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21 local type = type; |
145 | 22 local next = next; |
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23 local print = print; |
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24 local unpack = unpack; |
4 | 25 local s_gsub = string.gsub; |
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26 local os = os; |
145 | 27 |
262 | 28 local do_pretty_printing = not os.getenv("WINDIR"); |
29 local getstyle, getstring = require "util.termcolours".getstyle, require "util.termcolours".getstring; | |
30 | |
145 | 31 local log = require "util.logger".init("stanza"); |
32 | |
0 | 33 module "stanza" |
34 | |
35 stanza_mt = {}; | |
36 stanza_mt.__index = stanza_mt; | |
37 | |
38 function stanza(name, attr) | |
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39 local stanza = { name = name, attr = attr or {}, tags = {}, last_add = {}}; |
0 | 40 return setmetatable(stanza, stanza_mt); |
41 end | |
42 | |
43 function stanza_mt:query(xmlns) | |
44 return self:tag("query", { xmlns = xmlns }); | |
45 end | |
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46 |
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47 function stanza_mt:body(text, attr) |
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48 return self:tag("body", attr):text(text); |
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49 end |
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50 |
0 | 51 function stanza_mt:tag(name, attrs) |
52 local s = stanza(name, attrs); | |
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53 (self.last_add[#self.last_add] or self):add_direct_child(s); |
0 | 54 t_insert(self.last_add, s); |
55 return self; | |
56 end | |
57 | |
58 function stanza_mt:text(text) | |
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59 (self.last_add[#self.last_add] or self):add_direct_child(text); |
0 | 60 return self; |
61 end | |
62 | |
63 function stanza_mt:up() | |
64 t_remove(self.last_add); | |
65 return self; | |
66 end | |
67 | |
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68 function stanza_mt:reset() |
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69 local last_add = self.last_add; |
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70 for i = 1,#last_add do |
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71 last_add[i] = nil; |
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72 end |
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73 return self; |
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74 end |
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75 |
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76 function stanza_mt:add_direct_child(child) |
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77 if type(child) == "table" then |
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78 t_insert(self.tags, child); |
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79 end |
0 | 80 t_insert(self, child); |
81 end | |
82 | |
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83 function stanza_mt:add_child(child) |
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84 (self.last_add[#self.last_add] or self):add_direct_child(child); |
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85 return self; |
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86 end |
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87 |
0 | 88 function stanza_mt:child_with_name(name) |
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89 for _, child in ipairs(self.tags) do |
0 | 90 if child.name == name then return child; end |
91 end | |
92 end | |
93 | |
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94 function stanza_mt:child_with_ns(ns) |
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95 for _, child in ipairs(self.tags) do |
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96 if child.attr.xmlns == ns then return child; end |
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97 end |
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98 end |
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99 |
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100 function stanza_mt:children() |
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101 local i = 0; |
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102 return function (a) |
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103 i = i + 1 |
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104 local v = a[i] |
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105 if v then return v; end |
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106 end, self, i; |
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107 |
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108 end |
2 | 109 function stanza_mt:childtags() |
110 local i = 0; | |
111 return function (a) | |
112 i = i + 1 | |
113 local v = self.tags[i] | |
114 if v then return v; end | |
115 end, self.tags[1], i; | |
116 | |
117 end | |
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118 |
4 | 119 do |
120 local xml_entities = { ["'"] = "'", ["\""] = """, ["<"] = "<", [">"] = ">", ["&"] = "&" }; | |
121 function xml_escape(s) return s_gsub(s, "['&<>\"]", xml_entities); end | |
122 end | |
123 | |
124 local xml_escape = xml_escape; | |
125 | |
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126 local function dostring(t, buf, self, xml_escape) |
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127 local nsid, ns, attrk = 0; |
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128 t_insert(buf, "<"); |
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129 t_insert(buf, t.name); |
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130 for k, v in pairs(t.attr) do if type(k) == "string" then |
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131 t_insert(buf, " "); |
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132 ns, attrk = s_match(k, "^([^|]+)|(.+)$"); |
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133 if ns then |
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134 nsid = (nsid or -1) + 1; |
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135 t_insert(buf, "xmlns:ns"..nsid); |
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136 t_insert(buf, "='"); |
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137 t_insert(buf, (xml_escape(tostring(ns)))); |
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138 t_insert(buf, "' "); |
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139 t_insert(buf, "ns"..nsid..":"..attrk); |
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140 else |
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141 t_insert(buf, k); |
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142 end |
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143 t_insert(buf, "='"); |
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144 t_insert(buf, (xml_escape(tostring(v)))); |
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145 t_insert(buf, "'"); |
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146 end end |
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147 t_insert(buf, ">"); |
0 | 148 for n, child in ipairs(t) do |
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149 if child.name then |
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150 self(child, buf, self, xml_escape); |
4 | 151 else |
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152 t_insert(buf, (xml_escape(child))); |
4 | 153 end |
0 | 154 end |
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155 t_insert(buf, "</"); |
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156 t_insert(buf, t.name); |
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157 t_insert(buf, ">"); |
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158 end |
0 | 159 |
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160 function stanza_mt.__tostring(t) |
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161 local buf = {}; |
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162 dostring(t, buf, dostring, xml_escape); |
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163 return t_concat(buf); |
0 | 164 end |
165 | |
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166 |
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167 function stanza_mt.top_tag(t) |
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168 local attr_string = ""; |
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169 if t.attr then |
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170 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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171 end |
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172 return s_format("<%s%s>", t.name, attr_string); |
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173 end |
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174 |
0 | 175 function stanza_mt.__add(s1, s2) |
180
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176 return s1:add_direct_child(s2); |
0 | 177 end |
178 | |
179 | |
180 do | |
181 local id = 0; | |
182 function new_id() | |
183 id = id + 1; | |
184 return "lx"..id; | |
185 end | |
186 end | |
187 | |
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188 function preserialize(stanza) |
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189 local s = { name = stanza.name, attr = stanza.attr }; |
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190 for _, child in ipairs(stanza) do |
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191 if type(child) == "table" then |
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192 t_insert(s, preserialize(child)); |
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193 else |
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194 t_insert(s, child); |
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195 end |
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196 end |
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197 return s; |
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198 end |
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199 |
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200 function deserialize(stanza) |
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201 -- Set metatable |
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202 if stanza then |
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203 setmetatable(stanza, stanza_mt); |
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204 for _, child in ipairs(stanza) do |
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205 if type(child) == "table" then |
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206 deserialize(child); |
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207 end |
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208 end |
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209 if not stanza.tags then |
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210 -- Rebuild tags |
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211 local tags = {}; |
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212 for _, child in ipairs(stanza) do |
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213 if type(child) == "table" then |
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214 t_insert(tags, child); |
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215 end |
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216 end |
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217 stanza.tags = tags; |
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218 if not stanza.last_add then |
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219 stanza.last_add = {}; |
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220 end |
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221 end |
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222 end |
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223 |
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224 return stanza; |
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225 end |
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226 |
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227 function clone(stanza) |
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228 local lookup_table = {}; |
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229 local function _copy(object) |
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230 if type(object) ~= "table" then |
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231 return object; |
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232 elseif lookup_table[object] then |
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233 return lookup_table[object]; |
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234 end |
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235 local new_table = {}; |
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236 lookup_table[object] = new_table; |
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237 for index, value in pairs(object) do |
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238 new_table[_copy(index)] = _copy(value); |
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239 end |
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240 return setmetatable(new_table, getmetatable(object)); |
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241 end |
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242 return _copy(stanza) |
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243 end |
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244 |
0 | 245 function message(attr, body) |
246 if not body then | |
247 return stanza("message", attr); | |
248 else | |
249 return stanza("message", attr):tag("body"):text(body); | |
250 end | |
251 end | |
252 function iq(attr) | |
253 if attr and not attr.id then attr.id = new_id(); end | |
254 return stanza("iq", attr or { id = new_id() }); | |
255 end | |
256 | |
257 function reply(orig) | |
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258 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 | 259 end |
260 | |
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261 function error_reply(orig, type, condition, message) |
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262 local t = reply(orig); |
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263 t.attr.type = "error"; |
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264 t:tag("error", {type = type}) |
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265 :tag(condition, {xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas"}):up(); |
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266 if (message) then t:tag("text"):text(message):up(); end |
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267 return t; -- stanza ready for adding app-specific errors |
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268 end |
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269 |
0 | 270 function presence(attr) |
271 return stanza("presence", attr); | |
272 end | |
273 | |
262 | 274 if do_pretty_printing then |
275 local style_attrk = getstyle("yellow"); | |
276 local style_attrv = getstyle("red"); | |
277 local style_tagname = getstyle("red"); | |
278 local style_punc = getstyle("magenta"); | |
279 | |
280 local attr_format = " "..getstring(style_attrk, "%s")..getstring(style_punc, "=")..getstring(style_attrv, "'%s'"); | |
281 local top_tag_format = getstring(style_punc, "<")..getstring(style_tagname, "%s").."%s"..getstring(style_punc, ">"); | |
282 --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, ">"); | |
283 local tag_format = top_tag_format.."%s"..getstring(style_punc, "</")..getstring(style_tagname, "%s")..getstring(style_punc, ">"); | |
284 function stanza_mt.pretty_print(t) | |
285 local children_text = ""; | |
286 for n, child in ipairs(t) do | |
287 if type(child) == "string" then | |
288 children_text = children_text .. xml_escape(child); | |
289 else | |
290 children_text = children_text .. child:pretty_print(); | |
291 end | |
292 end | |
293 | |
294 local attr_string = ""; | |
295 if t.attr then | |
296 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 | |
297 end | |
298 return s_format(tag_format, t.name, attr_string, children_text, t.name); | |
299 end | |
300 | |
301 function stanza_mt.pretty_top_tag(t) | |
302 local attr_string = ""; | |
303 if t.attr then | |
304 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 | |
305 end | |
306 return s_format(top_tag_format, t.name, attr_string); | |
307 end | |
308 else | |
309 -- Sorry, fresh out of colours for you guys ;) | |
310 stanza_mt.pretty_print = stanza_mt.__tostring; | |
311 stanza_mt.pretty_top_tag = stanza_mt.top_tag; | |
312 end | |
313 | |
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314 return _M; |