prosody
b1885732e979
util/stanza.lua

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util/stanza.lua @ 758:b1885732e979

GPL->MIT!
author Matthew Wild <mwild1@gmail.com>
date Fri, 30 Jan 2009 17:22:56 +0000
parent 689:94b043fbaf33
child 759:5cccfb5da6cb
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1 -- Prosody IM v0.2
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2 -- Copyright (C) 2008 Matthew Wild
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3 -- Copyright (C) 2008 Waqas Hussain
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4 --
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5 -- This project is MIT/X11 licensed. Please see the
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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;
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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;
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20 local next = next;
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21 local print = print;
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22 local unpack = unpack;
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23 local s_gsub = string.gsub;
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24 local os = os;
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25
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26 local do_pretty_printing = not os.getenv("WINDIR");
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27 local getstyle, getstring = require "util.termcolours".getstyle, require "util.termcolours".getstring;
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28
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29 local log = require "util.logger".init("stanza");
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30
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31 module "stanza"
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32
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33 stanza_mt = {};
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34 stanza_mt.__index = stanza_mt;
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35
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36 function stanza(name, attr)
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37 local stanza = { name = name, attr = attr or {}, tags = {}, last_add = {}};
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38 return setmetatable(stanza, stanza_mt);
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39 end
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40
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41 function stanza_mt:query(xmlns)
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42 return self:tag("query", { xmlns = xmlns });
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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
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49 function stanza_mt:tag(name, attrs)
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50 local s = stanza(name, attrs);
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51 (self.last_add[#self.last_add] or self):add_direct_child(s);
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52 t_insert(self.last_add, s);
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53 return self;
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54 end
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55
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56 function stanza_mt:text(text)
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57 (self.last_add[#self.last_add] or self):add_direct_child(text);
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58 return self;
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59 end
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60
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61 function stanza_mt:up()
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62 t_remove(self.last_add);
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63 return self;
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64 end
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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
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70 t_insert(self, child);
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71 end
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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
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78 function stanza_mt:child_with_name(name)
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79 for _, child in ipairs(self.tags) do
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80 if child.name == name then return child; end
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81 end
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82 end
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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
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99 function stanza_mt:childtags()
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100 local i = 0;
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101 return function (a)
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102 i = i + 1
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103 local v = self.tags[i]
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104 if v then return v; end
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105 end, self.tags[1], i;
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106
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107 end
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108
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109 do
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110 local xml_entities = { ["'"] = "&apos;", ["\""] = "&quot;", ["<"] = "&lt;", [">"] = "&gt;", ["&"] = "&amp;" };
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111 function xml_escape(s) return s_gsub(s, "['&<>\"]", xml_entities); end
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112 end
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113
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114 local xml_escape = xml_escape;
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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, ">");
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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);
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130 else
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131 t_insert(buf, (xml_escape(child)));
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132 end
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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
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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);
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143 end
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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
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154 function stanza_mt.__add(s1, s2)
180
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155 return s1:add_direct_child(s2);
0
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156 end
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157
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158
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159 do
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160 local id = 0;
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161 function new_id()
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162 id = id + 1;
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163 return "lx"..id;
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164 end
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165 end
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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;
680
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parents: 627
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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
91
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200 end
90
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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
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206 function message(attr, body)
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207 if not body then
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208 return stanza("message", attr);
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209 else
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210 return stanza("message", attr):tag("body"):text(body);
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211 end
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212 end
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213 function iq(attr)
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214 if attr and not attr.id then attr.id = new_id(); end
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215 return stanza("iq", attr or { id = new_id() });
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216 end
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217
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218 function reply(orig)
209
e9de0803676d Part one of internal component support
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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
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220 end
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221
60
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222 function error_reply(orig, type, condition, message, clone)
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a6c00467a3f8 Fixed typo in variable name
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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
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232 function presence(attr)
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233 return stanza("presence", attr);
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234 end
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235
262
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236 if do_pretty_printing then
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237 local style_attrk = getstyle("yellow");
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238 local style_attrv = getstyle("red");
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239 local style_tagname = getstyle("red");
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240 local style_punc = getstyle("magenta");
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241
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242 local attr_format = " "..getstring(style_attrk, "%s")..getstring(style_punc, "=")..getstring(style_attrv, "'%s'");
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243 local top_tag_format = getstring(style_punc, "<")..getstring(style_tagname, "%s").."%s"..getstring(style_punc, ">");
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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, ">");
8c73fb2ff4a2 A treat for Linux users ;)
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245 local tag_format = top_tag_format.."%s"..getstring(style_punc, "</")..getstring(style_tagname, "%s")..getstring(style_punc, ">");
8c73fb2ff4a2 A treat for Linux users ;)
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246 function stanza_mt.pretty_print(t)
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247 local children_text = "";
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248 for n, child in ipairs(t) do
8c73fb2ff4a2 A treat for Linux users ;)
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parents: 251
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249 if type(child) == "string" then
8c73fb2ff4a2 A treat for Linux users ;)
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parents: 251
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250 children_text = children_text .. xml_escape(child);
8c73fb2ff4a2 A treat for Linux users ;)
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parents: 251
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251 else
8c73fb2ff4a2 A treat for Linux users ;)
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252 children_text = children_text .. child:pretty_print();
8c73fb2ff4a2 A treat for Linux users ;)
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253 end
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254 end
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255
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256 local attr_string = "";
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257 if t.attr then
8c73fb2ff4a2 A treat for Linux users ;)
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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
8c73fb2ff4a2 A treat for Linux users ;)
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259 end
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260 return s_format(tag_format, t.name, attr_string, children_text, t.name);
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261 end
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262
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263 function stanza_mt.pretty_top_tag(t)
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264 local attr_string = "";
8c73fb2ff4a2 A treat for Linux users ;)
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265 if t.attr then
8c73fb2ff4a2 A treat for Linux users ;)
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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
8c73fb2ff4a2 A treat for Linux users ;)
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267 end
8c73fb2ff4a2 A treat for Linux users ;)
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268 return s_format(top_tag_format, t.name, attr_string);
8c73fb2ff4a2 A treat for Linux users ;)
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269 end
8c73fb2ff4a2 A treat for Linux users ;)
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270 else
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diff changeset
271 -- Sorry, fresh out of colours for you guys ;)
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272 stanza_mt.pretty_print = stanza_mt.__tostring;
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273 stanza_mt.pretty_top_tag = stanza_mt.top_tag;
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274 end
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275
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276 return _M;