prosody
88e4397e39a9
util/dataforms.lua

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util/dataforms.lua @ 3636:88e4397e39a9

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author Waqas Hussain <waqas20@gmail.com>
date Sat, 20 Nov 2010 21:59:31 +0500
parent 3540:bc139431830b
child 4397:1378e3c79c34
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1 -- Prosody IM
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2 -- Copyright (C) 2008-2010 Matthew Wild
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3 -- Copyright (C) 2008-2010 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 local setmetatable = setmetatable;
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10 local pairs, ipairs = pairs, ipairs;
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11 local tostring, type = tostring, type;
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12 local t_concat = table.concat;
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13 local st = require "util.stanza";
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14
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15 module "dataforms"
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16
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17 local xmlns_forms = 'jabber:x:data';
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18
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19 local form_t = {};
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20 local form_mt = { __index = form_t };
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21
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22 function new(layout)
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23 return setmetatable(layout, form_mt);
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24 end
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25
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26 function form_t.form(layout, data, formtype)
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27 local form = st.stanza("x", { xmlns = xmlns_forms, type = formtype or "form" });
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28 if layout.title then
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29 form:tag("title"):text(layout.title):up();
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30 end
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31 if layout.instructions then
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32 form:tag("instructions"):text(layout.instructions):up();
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33 end
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34 for n, field in ipairs(layout) do
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35 local field_type = field.type or "text-single";
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36 -- Add field tag
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37 form:tag("field", { type = field_type, var = field.name, label = field.label });
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38
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39 local value = (data and data[field.name]) or field.value;
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40
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41 if value then
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42 -- Add value, depending on type
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43 if field_type == "hidden" then
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44 if type(value) == "table" then
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45 -- Assume an XML snippet
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46 form:tag("value")
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47 :add_child(value)
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48 :up();
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49 else
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50 form:tag("value"):text(tostring(value)):up();
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51 end
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52 elseif field_type == "boolean" then
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53 form:tag("value"):text((value and "1") or "0"):up();
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54 elseif field_type == "fixed" then
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55
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56 elseif field_type == "jid-multi" then
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57 for _, jid in ipairs(value) do
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58 form:tag("value"):text(jid):up();
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59 end
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60 elseif field_type == "jid-single" then
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61 form:tag("value"):text(value):up();
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62 elseif field_type == "text-single" or field_type == "text-private" then
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63 form:tag("value"):text(value):up();
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64 elseif field_type == "text-multi" then
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65 -- Split into multiple <value> tags, one for each line
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66 for line in value:gmatch("([^\r\n]+)\r?\n*") do
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67 form:tag("value"):text(line):up();
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68 end
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69 elseif field_type == "list-single" then
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70 local has_default = false;
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71 for _, val in ipairs(value) do
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72 if type(val) == "table" then
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73 form:tag("option", { label = val.label }):tag("value"):text(val.value):up():up();
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74 if val.default and (not has_default) then
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75 form:tag("value"):text(val.value):up();
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76 has_default = true;
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77 end
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78 else
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79 form:tag("option", { label= val }):tag("value"):text(tostring(val)):up():up();
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80 end
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81 end
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82 elseif field_type == "list-multi" then
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83 for _, val in ipairs(value) do
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84 if type(val) == "table" then
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85 form:tag("option", { label = val.label }):tag("value"):text(val.value):up():up();
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86 if val.default then
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87 form:tag("value"):text(val.value):up();
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88 end
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89 else
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90 form:tag("option", { label= val }):tag("value"):text(tostring(val)):up():up();
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91 end
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92 end
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93 end
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94 end
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95
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96 if field.required then
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97 form:tag("required"):up();
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98 end
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99
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100 -- Jump back up to list of fields
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101 form:up();
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102 end
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103 return form;
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104 end
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105
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106 local field_readers = {};
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107
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108 function form_t.data(layout, stanza)
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109 local data = {};
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110
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111 for field_tag in stanza:childtags() do
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112 local field_type;
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113 for n, field in ipairs(layout) do
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114 if field.name == field_tag.attr.var then
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115 field_type = field.type;
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116 break;
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117 end
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118 end
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119
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120 local reader = field_readers[field_type];
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121 if reader then
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122 data[field_tag.attr.var] = reader(field_tag);
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123 end
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124
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125 end
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126 return data;
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127 end
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128
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129 field_readers["text-single"] =
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130 function (field_tag)
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131 local value = field_tag:child_with_name("value");
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132 if value then
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133 return value[1];
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134 end
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135 end
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136
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137 field_readers["text-private"] =
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138 field_readers["text-single"];
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139
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140 field_readers["jid-single"] =
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141 field_readers["text-single"];
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142
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143 field_readers["jid-multi"] =
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144 function (field_tag)
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145 local result = {};
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146 for value_tag in field_tag:childtags() do
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147 if value_tag.name == "value" then
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148 result[#result+1] = value_tag[1];
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149 end
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150 end
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151 return result;
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152 end
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153
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154 field_readers["text-multi"] =
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155 function (field_tag)
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156 local result = {};
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157 for value_tag in field_tag:childtags() do
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158 if value_tag.name == "value" then
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159 result[#result+1] = value_tag[1];
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160 end
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161 end
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162 return t_concat(result, "\n");
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163 end
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164
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165 field_readers["list-single"] =
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166 field_readers["text-single"];
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167
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168 field_readers["list-multi"] =
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169 function (field_tag)
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170 local result = {};
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171 for value_tag in field_tag:childtags() do
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172 if value_tag.name == "value" then
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173 result[#result+1] = value_tag[1];
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174 end
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175 end
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176 return result;
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177 end
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178
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179 field_readers["boolean"] =
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180 function (field_tag)
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181 local value = field_tag:child_with_name("value");
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182 if value then
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183 if value[1] == "1" or value[1] == "true" then
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184 return true;
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185 else
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186 return false;
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187 end
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188 end
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189 end
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190
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191 field_readers["hidden"] =
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192 function (field_tag)
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193 local value = field_tag:child_with_name("value");
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194 if value then
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195 return value[1];
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196 end
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197 end
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198
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199 return _M;
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200
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201
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202 --[=[
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203
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204 Layout:
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205 {
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206
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207 title = "MUC Configuration",
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208 instructions = [[Use this form to configure options for this MUC room.]],
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209
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210 { name = "FORM_TYPE", type = "hidden", required = true };
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211 { name = "field-name", type = "field-type", required = false };
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212 }
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213
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214
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215 --]=]