prosody
af8cdbb63b13
util/stanza.lua

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util/stanza.lua @ 1932:af8cdbb63b13

util.stanza: Soften dependency on util.termcolours
author Matthew Wild <mwild1@gmail.com>
date Tue, 06 Oct 2009 19:17:28 +0100
parent 1931:f203330eb82e
child 1935:05adeddf9f1b
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1 -- Prosody IM
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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 --
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b1885732e979 GPL->MIT!
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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 local t_insert = table.insert;
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10 local t_concat = table.concat;
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11 local t_remove = table.remove;
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12 local t_concat = table.concat;
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13 local s_format = string.format;
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14 local s_match = string.match;
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15 local tostring = tostring;
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16 local setmetatable = setmetatable;
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17 local getmetatable = getmetatable;
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18 local pairs = pairs;
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19 local ipairs = ipairs;
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20 local type = type;
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21 local next = next;
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22 local print = print;
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23 local unpack = unpack;
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24 local s_gsub = string.gsub;
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25 local s_char = string.char;
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26 local s_find = string.find;
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27 local os = os;
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28
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29 local do_pretty_printing = not os.getenv("WINDIR");
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30 local getstyle, getstring;
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31 if do_pretty_printing then
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32 local ok, termcolours = pcall(require, "util.termcolours");
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33 if ok then
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34 getstyle, getstring = termcolours.getstyle, termcolours.getstring;
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35 else
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36 do_pretty_printing = nil;
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37 end
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38 end
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39
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40 local log = require "util.logger".init("stanza");
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41
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42 module "stanza"
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43
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44 stanza_mt = { __type = "stanza" };
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45 stanza_mt.__index = stanza_mt;
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46
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47 function stanza(name, attr)
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48 local stanza = { name = name, attr = attr or {}, tags = {}, last_add = {}};
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49 return setmetatable(stanza, stanza_mt);
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50 end
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51
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52 function stanza_mt:query(xmlns)
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53 return self:tag("query", { xmlns = xmlns });
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54 end
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55
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56 function stanza_mt:body(text, attr)
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57 return self:tag("body", attr):text(text);
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58 end
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59
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60 function stanza_mt:tag(name, attrs)
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61 local s = stanza(name, attrs);
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62 (self.last_add[#self.last_add] or self):add_direct_child(s);
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63 t_insert(self.last_add, s);
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64 return self;
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65 end
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66
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67 function stanza_mt:text(text)
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68 (self.last_add[#self.last_add] or self):add_direct_child(text);
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69 return self;
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70 end
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71
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72 function stanza_mt:up()
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73 t_remove(self.last_add);
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74 return self;
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75 end
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76
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77 function stanza_mt:reset()
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78 local last_add = self.last_add;
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79 for i = 1,#last_add do
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80 last_add[i] = nil;
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81 end
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82 return self;
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83 end
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84
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85 function stanza_mt:add_direct_child(child)
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86 if type(child) == "table" then
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87 t_insert(self.tags, child);
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88 end
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89 t_insert(self, child);
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90 end
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91
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92 function stanza_mt:add_child(child)
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93 (self.last_add[#self.last_add] or self):add_direct_child(child);
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94 return self;
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95 end
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96
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97 function stanza_mt:child_with_name(name)
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98 for _, child in ipairs(self.tags) do
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99 if child.name == name then return child; end
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100 end
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101 end
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102
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103 function stanza_mt:child_with_ns(ns)
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104 for _, child in ipairs(self.tags) do
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105 if child.attr.xmlns == ns then return child; end
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106 end
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107 end
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108
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109 function stanza_mt:children()
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110 local i = 0;
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111 return function (a)
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112 i = i + 1
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113 local v = a[i]
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114 if v then return v; end
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115 end, self, i;
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116
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117 end
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118 function stanza_mt:childtags()
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119 local i = 0;
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120 return function (a)
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121 i = i + 1
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122 local v = self.tags[i]
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123 if v then return v; end
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124 end, self.tags[1], i;
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125
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126 end
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127
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128 local xml_escape
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129 do
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130 local escape_table = { ["'"] = "&apos;", ["\""] = "&quot;", ["<"] = "&lt;", [">"] = "&gt;", ["&"] = "&amp;" };
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131 function xml_escape(str) return (s_gsub(str, "['&<>\"]", escape_table)); end
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132 _M.xml_escape = xml_escape;
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133 end
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134
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135 local function _dostring(t, buf, self, xml_escape)
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136 local nsid = 0;
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137 local name = t.name
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138 t_insert(buf, "<"..name);
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139 for k, v in pairs(t.attr) do
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140 if s_find(k, "|", 1, true) then
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141 local ns, attrk = s_match(k, "^([^|]+)|(.+)$");
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142 nsid = nsid + 1;
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143 t_insert(buf, " xmlns:ns"..nsid.."='"..xml_escape(ns).."' ".."ns"..nsid..":"..attrk.."='"..xml_escape(v).."'");
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144 else
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145 t_insert(buf, " "..k.."='"..xml_escape(v).."'");
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146 end
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147 end
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148 local len = #t;
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149 if len == 0 then
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150 t_insert(buf, "/>");
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151 else
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152 t_insert(buf, ">");
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diff changeset
153 for n=1,len do
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154 local child = t[n];
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155 if child.name then
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156 self(child, buf, self, xml_escape);
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157 else
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158 t_insert(buf, xml_escape(child));
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159 end
4
09c3845ed442 Presence unavailable on disconnect
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parents: 2
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160 end
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161 t_insert(buf, "</"..name..">");
0
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162 end
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163 end
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164 function stanza_mt.__tostring(t)
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165 local buf = {};
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166 _dostring(t, buf, _dostring, xml_escape);
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167 return t_concat(buf);
0
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168 end
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169
242
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170 function stanza_mt.top_tag(t)
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171 local attr_string = "";
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172 if t.attr then
338
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parents: 262
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173 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
242
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parents: 209
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174 end
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parents: 209
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175 return s_format("<%s%s>", t.name, attr_string);
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parents: 209
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176 end
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parents: 209
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177
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178 function stanza_mt.get_text(t)
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179 if #t.tags == 0 then
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180 return t_concat(t);
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181 end
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parents: 1416
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182 end
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183
0
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184 function stanza_mt.__add(s1, s2)
180
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185 return s1:add_direct_child(s2);
0
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186 end
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187
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188
3e3171b59028 First commit, where do you want to go tomorrow?
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189 do
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190 local id = 0;
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191 function new_id()
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192 id = id + 1;
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193 return "lx"..id;
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194 end
0
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195 end
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196
90
da468ed49a7b Stanza preserialize/deserialize helpers, to strip and restore stanzas respectively. Fixed mod_vcard to use these.
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parents: 70
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197 function preserialize(stanza)
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198 local s = { name = stanza.name, attr = stanza.attr };
da468ed49a7b Stanza preserialize/deserialize helpers, to strip and restore stanzas respectively. Fixed mod_vcard to use these.
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parents: 70
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199 for _, child in ipairs(stanza) do
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200 if type(child) == "table" then
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201 t_insert(s, preserialize(child));
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parents: 70
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202 else
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parents: 70
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203 t_insert(s, child);
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parents: 70
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204 end
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parents: 70
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205 end
da468ed49a7b Stanza preserialize/deserialize helpers, to strip and restore stanzas respectively. Fixed mod_vcard to use these.
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parents: 70
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206 return s;
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parents: 70
diff changeset
207 end
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parents: 70
diff changeset
208
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parents: 70
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209 function deserialize(stanza)
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210 -- Set metatable
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211 if stanza then
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212 local attr = stanza.attr;
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213 for i=1,#attr do attr[i] = nil; end
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parents: 90
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214 setmetatable(stanza, stanza_mt);
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parents: 70
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215 for _, child in ipairs(stanza) do
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parents: 70
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216 if type(child) == "table" then
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217 deserialize(child);
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parents: 70
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218 end
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parents: 70
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219 end
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220 if not stanza.tags then
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221 -- Rebuild tags
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222 local tags = {};
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223 for _, child in ipairs(stanza) do
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224 if type(child) == "table" then
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225 t_insert(tags, child);
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226 end
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parents: 90
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227 end
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228 stanza.tags = tags;
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parents: 627
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229 if not stanza.last_add then
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230 stanza.last_add = {};
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parents: 627
diff changeset
231 end
91
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232 end
90
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parents: 70
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233 end
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234
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235 return stanza;
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parents: 70
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236 end
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237
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238 function clone(stanza)
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239 local lookup_table = {};
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240 local function _copy(object)
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241 if type(object) ~= "table" then
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242 return object;
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243 elseif lookup_table[object] then
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244 return lookup_table[object];
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245 end
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246 local new_table = {};
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247 lookup_table[object] = new_table;
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248 for index, value in pairs(object) do
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249 new_table[_copy(index)] = _copy(value);
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250 end
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251 return setmetatable(new_table, getmetatable(object));
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252 end
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253
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254 return _copy(stanza)
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255 end
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256
0
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257 function message(attr, body)
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258 if not body then
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259 return stanza("message", attr);
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260 else
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261 return stanza("message", attr):tag("body"):text(body);
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262 end
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263 end
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264 function iq(attr)
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265 if attr and not attr.id then attr.id = new_id(); end
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266 return stanza("iq", attr or { id = new_id() });
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267 end
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268
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269 function reply(orig)
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e9de0803676d Part one of internal component support
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270 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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271 end
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272
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273 function error_reply(orig, type, condition, message)
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parents: 62
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274 local t = reply(orig);
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44800be871f5 User registration, etc (jabber:iq:register)
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275 t.attr.type = "error";
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276 t:tag("error", {type = type})
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277 :tag(condition, {xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas"}):up();
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278 if (message) then t:tag("text"):text(message):up(); end
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279 return t; -- stanza ready for adding app-specific errors
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280 end
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281
0
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282 function presence(attr)
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283 return stanza("presence", attr);
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284 end
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285
262
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parents: 251
diff changeset
286 if do_pretty_printing then
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287 local style_attrk = getstyle("yellow");
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288 local style_attrv = getstyle("red");
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289 local style_tagname = getstyle("red");
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290 local style_punc = getstyle("magenta");
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291
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292 local attr_format = " "..getstring(style_attrk, "%s")..getstring(style_punc, "=")..getstring(style_attrv, "'%s'");
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293 local top_tag_format = getstring(style_punc, "<")..getstring(style_tagname, "%s").."%s"..getstring(style_punc, ">");
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294 --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, ">");
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295 local tag_format = top_tag_format.."%s"..getstring(style_punc, "</")..getstring(style_tagname, "%s")..getstring(style_punc, ">");
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296 function stanza_mt.pretty_print(t)
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297 local children_text = "";
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298 for n, child in ipairs(t) do
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299 if type(child) == "string" then
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300 children_text = children_text .. xml_escape(child);
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301 else
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302 children_text = children_text .. child:pretty_print();
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303 end
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304 end
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305
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306 local attr_string = "";
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307 if t.attr then
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308 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
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309 end
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310 return s_format(tag_format, t.name, attr_string, children_text, t.name);
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311 end
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312
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313 function stanza_mt.pretty_top_tag(t)
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314 local attr_string = "";
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315 if t.attr then
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316 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
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317 end
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318 return s_format(top_tag_format, t.name, attr_string);
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319 end
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320 else
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321 -- Sorry, fresh out of colours for you guys ;)
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322 stanza_mt.pretty_print = stanza_mt.__tostring;
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323 stanza_mt.pretty_top_tag = stanza_mt.top_tag;
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324 end
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325
90
da468ed49a7b Stanza preserialize/deserialize helpers, to strip and restore stanzas respectively. Fixed mod_vcard to use these.
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326 return _M;