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util/dataforms.lua

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util/dataforms.lua @ 283:39ce7535887c

plugins.pubsub: Add a local variable to save some table lookups
author Kim Alvefur <zash@zash.se>
date Mon, 05 Mar 2012 20:18:54 +0100
parent 123:8a079aa70b84
child 334:34c52f3b21c4
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123
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Matthew Wild <mwild1@gmail.com>
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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 if type(value) == "string" then
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72 form:tag("value"):text(value):up();
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73 else
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74 for _, val in ipairs(value) do
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75 if type(val) == "table" then
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76 form:tag("option", { label = val.label }):tag("value"):text(val.value):up():up();
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77 if val.default and (not has_default) then
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78 form:tag("value"):text(val.value):up();
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79 has_default = true;
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80 end
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81 else
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82 form:tag("option", { label= val }):tag("value"):text(tostring(val)):up():up();
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83 end
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84 end
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85 end
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86 elseif field_type == "list-multi" then
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87 for _, val in ipairs(value) do
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88 if type(val) == "table" then
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89 form:tag("option", { label = val.label }):tag("value"):text(val.value):up():up();
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90 if val.default then
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91 form:tag("value"):text(val.value):up();
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92 end
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93 else
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94 form:tag("option", { label= val }):tag("value"):text(tostring(val)):up():up();
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95 end
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96 end
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97 end
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98 end
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99
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100 if field.required then
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101 form:tag("required"):up();
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102 end
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103
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104 -- Jump back up to list of fields
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105 form:up();
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106 end
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107 return form;
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108 end
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109
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110 local field_readers = {};
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111
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112 function form_t.data(layout, stanza)
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113 local data = {};
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114
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115 for field_tag in stanza:childtags() do
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116 local field_type;
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117 for n, field in ipairs(layout) do
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118 if field.name == field_tag.attr.var then
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119 field_type = field.type;
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120 break;
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121 end
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122 end
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123
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124 local reader = field_readers[field_type];
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125 if reader then
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126 data[field_tag.attr.var] = reader(field_tag);
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127 end
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128
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129 end
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130 return data;
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131 end
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132
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133 field_readers["text-single"] =
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134 function (field_tag)
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135 local value = field_tag:child_with_name("value");
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136 if value then
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137 return value[1];
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138 end
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139 end
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140
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141 field_readers["text-private"] =
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142 field_readers["text-single"];
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143
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144 field_readers["jid-single"] =
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145 field_readers["text-single"];
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146
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147 field_readers["jid-multi"] =
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148 function (field_tag)
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149 local result = {};
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150 for value_tag in field_tag:childtags() do
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151 if value_tag.name == "value" then
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152 result[#result+1] = value_tag[1];
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153 end
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154 end
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155 return result;
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156 end
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157
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158 field_readers["text-multi"] =
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159 function (field_tag)
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160 local result = {};
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161 for value_tag in field_tag:childtags() do
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162 if value_tag.name == "value" then
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163 result[#result+1] = value_tag[1];
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164 end
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165 end
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166 return t_concat(result, "\n");
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167 end
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168
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169 field_readers["list-single"] =
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170 field_readers["text-single"];
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171
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172 field_readers["list-multi"] =
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173 function (field_tag)
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174 local result = {};
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175 for value_tag in field_tag:childtags() do
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176 if value_tag.name == "value" then
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177 result[#result+1] = value_tag[1];
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178 end
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179 end
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180 return result;
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181 end
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182
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183 field_readers["boolean"] =
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184 function (field_tag)
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185 local value = field_tag:child_with_name("value");
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186 if value then
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187 if value[1] == "1" or value[1] == "true" then
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188 return true;
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189 else
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190 return false;
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191 end
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192 end
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Matthew Wild <mwild1@gmail.com>
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193 end
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194
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195 field_readers["hidden"] =
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196 function (field_tag)
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197 local value = field_tag:child_with_name("value");
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198 if value then
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199 return value[1];
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200 end
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201 end
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Matthew Wild <mwild1@gmail.com>
parents:
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202
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203 return _M;
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204
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205
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Matthew Wild <mwild1@gmail.com>
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206 --[=[
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207
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208 Layout:
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209 {
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210
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211 title = "MUC Configuration",
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Matthew Wild <mwild1@gmail.com>
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212 instructions = [[Use this form to configure options for this MUC room.]],
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213
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214 { name = "FORM_TYPE", type = "hidden", required = true };
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parents:
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215 { name = "field-name", type = "field-type", required = false };
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216 }
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parents:
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217
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218
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219 --]=]