prosody
15464633d8fb
util/dataforms.lua

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util/dataforms.lua @ 5537:15464633d8fb

util.hmac, util.hashes: Implement HMAC functions in C, and move to util.hashes
author Florian Zeitz <florob@babelmonkeys.de>
date Sat, 27 Apr 2013 17:01:31 +0200
parent 4928:5211c11dd865
child 5551:e1e06f1465be
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rev   line source
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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, next = tostring, type, next;
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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 local jid_prep = require "util.jid".prep;
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15
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16 module "dataforms"
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17
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18 local xmlns_forms = 'jabber:x:data';
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19
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20 local form_t = {};
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21 local form_mt = { __index = form_t };
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22
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23 function new(layout)
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24 return setmetatable(layout, form_mt);
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25 end
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26
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27 function form_t.form(layout, data, formtype)
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28 local form = st.stanza("x", { xmlns = xmlns_forms, type = formtype or "form" });
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29 if layout.title then
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30 form:tag("title"):text(layout.title):up();
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31 end
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32 if layout.instructions then
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33 form:tag("instructions"):text(layout.instructions):up();
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34 end
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35 for n, field in ipairs(layout) do
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36 local field_type = field.type or "text-single";
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37 -- Add field tag
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38 form:tag("field", { type = field_type, var = field.name, label = field.label });
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39
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40 local value = (data and data[field.name]) or field.value;
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41
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42 if value then
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43 -- Add value, depending on type
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44 if field_type == "hidden" then
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45 if type(value) == "table" then
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46 -- Assume an XML snippet
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47 form:tag("value")
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48 :add_child(value)
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49 :up();
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50 else
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51 form:tag("value"):text(tostring(value)):up();
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52 end
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53 elseif field_type == "boolean" then
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54 form:tag("value"):text((value and "1") or "0"):up();
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55 elseif field_type == "fixed" then
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56
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57 elseif field_type == "jid-multi" then
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58 for _, jid in ipairs(value) do
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59 form:tag("value"):text(jid):up();
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60 end
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61 elseif field_type == "jid-single" then
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62 form:tag("value"):text(value):up();
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63 elseif field_type == "text-single" or field_type == "text-private" then
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64 form:tag("value"):text(value):up();
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65 elseif field_type == "text-multi" then
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66 -- Split into multiple <value> tags, one for each line
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67 for line in value:gmatch("([^\r\n]+)\r?\n*") do
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68 form:tag("value"):text(line):up();
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69 end
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70 elseif field_type == "list-single" then
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71 local has_default = false;
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72 for _, val in ipairs(value) do
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73 if type(val) == "table" then
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74 form:tag("option", { label = val.label }):tag("value"):text(val.value):up():up();
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75 if val.default and (not has_default) then
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76 form:tag("value"):text(val.value):up();
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77 has_default = true;
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78 end
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79 else
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80 form:tag("option", { label= val }):tag("value"):text(tostring(val)):up():up();
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81 end
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82 end
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83 elseif field_type == "list-multi" then
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84 for _, val in ipairs(value) do
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85 if type(val) == "table" then
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86 form:tag("option", { label = val.label }):tag("value"):text(val.value):up():up();
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87 if val.default then
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88 form:tag("value"):text(val.value):up();
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89 end
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90 else
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91 form:tag("option", { label= val }):tag("value"):text(tostring(val)):up():up();
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92 end
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93 end
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94 end
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95 end
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96
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97 if field.required then
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98 form:tag("required"):up();
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99 end
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100
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101 -- Jump back up to list of fields
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102 form:up();
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103 end
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104 return form;
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105 end
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106
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107 local field_readers = {};
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108
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109 function form_t.data(layout, stanza)
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110 local data = {};
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111 local errors = {};
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112
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113 for _, field in ipairs(layout) do
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114 local tag;
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115 for field_tag in stanza:childtags() do
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116 if field.name == field_tag.attr.var then
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117 tag = field_tag;
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118 break;
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119 end
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120 end
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121
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122 if not tag then
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123 if field.required then
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124 errors[field.name] = "Required value missing";
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125 end
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126 else
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127 local reader = field_readers[field.type];
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128 if reader then
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129 data[field.name], errors[field.name] = reader(tag, field.required);
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130 end
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131 end
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132 end
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133 if next(errors) then
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134 return data, errors;
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135 end
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136 return data;
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137 end
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138
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139 field_readers["text-single"] =
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140 function (field_tag, required)
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141 local data = field_tag:get_child_text("value");
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142 if data and #data > 0 then
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143 return data
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144 elseif required then
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145 return nil, "Required value missing";
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146 end
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147 end
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148
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149 field_readers["text-private"] =
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150 field_readers["text-single"];
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151
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152 field_readers["jid-single"] =
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153 function (field_tag, required)
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154 local raw_data = field_tag:get_child_text("value")
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155 local data = jid_prep(raw_data);
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156 if data and #data > 0 then
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157 return data
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158 elseif raw_data then
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159 return nil, "Invalid JID: " .. raw_data;
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160 elseif required then
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161 return nil, "Required value missing";
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162 end
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163 end
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164
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165 field_readers["jid-multi"] =
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166 function (field_tag, required)
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167 local result = {};
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168 local err = {};
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169 for value_tag in field_tag:childtags("value") do
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170 local raw_value = value_tag:get_text();
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171 local value = jid_prep(raw_value);
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172 result[#result+1] = value;
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173 if raw_value and not value then
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174 err[#err+1] = ("Invalid JID: " .. raw_value);
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175 end
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176 end
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177 if #result > 0 then
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178 return result, (#err > 0 and t_concat(err, "\n") or nil);
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179 elseif required then
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180 return nil, "Required value missing";
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181 end
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182 end
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183
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184 field_readers["list-multi"] =
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185 function (field_tag, required)
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186 local result = {};
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187 for value in field_tag:childtags("value") do
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188 result[#result+1] = value:get_text();
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189 end
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190 return result, (required and #result == 0 and "Required value missing" or nil);
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191 end
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192
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193 field_readers["text-multi"] =
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194 function (field_tag, required)
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195 local data, err = field_readers["list-multi"](field_tag, required);
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196 if data then
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197 data = t_concat(data, "\n");
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198 end
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199 return data, err;
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200 end
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201
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202 field_readers["list-single"] =
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203 field_readers["text-single"];
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204
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205 local boolean_values = {
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206 ["1"] = true, ["true"] = true,
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207 ["0"] = false, ["false"] = false,
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208 };
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209
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210 field_readers["boolean"] =
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211 function (field_tag, required)
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212 local raw_value = field_tag:get_child_text("value");
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213 local value = boolean_values[raw_value ~= nil and raw_value];
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214 if value ~= nil then
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215 return value;
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216 elseif raw_value then
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217 return nil, "Invalid boolean representation";
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218 elseif required then
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219 return nil, "Required value missing";
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220 end
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221 end
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222
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223 field_readers["hidden"] =
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224 function (field_tag)
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225 return field_tag:get_child_text("value");
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226 end
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227
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228 return _M;
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parents:
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229
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230
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231 --[=[
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232
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233 Layout:
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234 {
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235
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236 title = "MUC Configuration",
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237 instructions = [[Use this form to configure options for this MUC room.]],
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238
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239 { name = "FORM_TYPE", type = "hidden", required = true };
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240 { name = "field-name", type = "field-type", required = false };
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241 }
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242
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243
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244 --]=]