prosody
075df839c110
util/dataforms.lua

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util/dataforms.lua @ 8530:075df839c110

net.server_event: Not every instantly-readable connection is an error, continue if possible
author Matthew Wild <mwild1@gmail.com>
date Fri, 23 Feb 2018 15:41:12 +0000
parent 8255:d70d4c1ac17a
child 8555:4f0f5b49bb03
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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 ipairs = 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 local _ENV = nil;
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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 local 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 _, 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 form:tag("value"):text(value):up();
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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 if formtype ~= "result" then
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72 local has_default = false;
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73 for _, val in ipairs(field.options or value) do
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74 if type(val) == "table" then
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75 form:tag("option", { label = val.label }):tag("value"):text(val.value):up():up();
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76 if value == val.value or val.default and (not has_default) then
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77 form:tag("value"):text(val.value):up();
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78 has_default = true;
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79 end
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80 else
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81 form:tag("option", { label= val }):tag("value"):text(tostring(val)):up():up();
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82 end
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83 end
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84 end
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85 if (field.options or formtype == "result") and value then
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86 form:tag("value"):text(value):up();
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87 end
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88 elseif field_type == "list-multi" then
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89 if formtype ~= "result" then
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90 for _, val in ipairs(field.options or value) do
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91 if type(val) == "table" then
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92 form:tag("option", { label = val.label }):tag("value"):text(val.value):up():up();
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93 if not field.options and val.default then
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94 form:tag("value"):text(val.value):up();
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95 end
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96 else
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97 form:tag("option", { label= val }):tag("value"):text(tostring(val)):up():up();
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98 end
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99 end
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100 end
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101 if (field.options or formtype == "result") and value then
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102 for _, val in ipairs(value) do
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103 form:tag("value"):text(val):up();
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104 end
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105 end
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106 end
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107 end
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108
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109 local media = field.media;
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110 if media then
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111 form:tag("media", { xmlns = "urn:xmpp:media-element", height = media.height, width = media.width });
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112 for _, val in ipairs(media) do
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113 form:tag("uri", { type = val.type }):text(val.uri):up()
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114 end
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115 form:up();
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116 end
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117
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118 if field.required then
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119 form:tag("required"):up();
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120 end
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121
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122 -- Jump back up to list of fields
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123 form:up();
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124 end
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125 return form;
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126 end
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127
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128 local field_readers = {};
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129
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130 function form_t.data(layout, stanza)
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131 local data = {};
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132 local errors = {};
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133 local present = {};
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134
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135 for _, field in ipairs(layout) do
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136 local tag;
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137 for field_tag in stanza:childtags("field") do
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138 if field.name == field_tag.attr.var then
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139 tag = field_tag;
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140 break;
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141 end
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142 end
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143
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144 if not tag then
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145 if field.required then
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146 errors[field.name] = "Required value missing";
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147 end
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148 else
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149 present[field.name] = true;
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150 local reader = field_readers[field.type];
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151 if reader then
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152 data[field.name], errors[field.name] = reader(tag, field.required);
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153 end
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154 end
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155 end
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156 if next(errors) then
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157 return data, errors, present;
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158 end
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159 return data, nil, present;
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160 end
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161
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162 local function simple_text(field_tag, required)
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163 local data = field_tag:get_child_text("value");
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164 -- XEP-0004 does not say if an empty string is acceptable for a required value
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165 -- so we will follow HTML5 which says that empty string means missing
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166 if required and (data == nil or data == "") then
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167 return nil, "Required value missing";
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168 end
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169 return data; -- Return whatever get_child_text returned, even if empty string
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170 end
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171
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172 field_readers["text-single"] = simple_text;
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173
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174 field_readers["text-private"] = simple_text;
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175
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176 field_readers["jid-single"] =
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177 function (field_tag, required)
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178 local raw_data, err = simple_text(field_tag, required);
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179 if not raw_data then return raw_data, err; end
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180 local data = jid_prep(raw_data);
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181 if not data then
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182 return nil, "Invalid JID: " .. raw_data;
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183 end
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184 return data;
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185 end
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186
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187 field_readers["jid-multi"] =
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188 function (field_tag, required)
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189 local result = {};
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190 local err = {};
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191 for value_tag in field_tag:childtags("value") do
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192 local raw_value = value_tag:get_text();
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193 local value = jid_prep(raw_value);
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194 result[#result+1] = value;
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195 if raw_value and not value then
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196 err[#err+1] = ("Invalid JID: " .. raw_value);
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197 end
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198 end
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199 if #result > 0 then
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200 return result, (#err > 0 and t_concat(err, "\n") or nil);
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201 elseif required then
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202 return nil, "Required value missing";
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203 end
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204 end
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205
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206 field_readers["list-multi"] =
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207 function (field_tag, required)
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208 local result = {};
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209 for value in field_tag:childtags("value") do
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210 result[#result+1] = value:get_text();
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211 end
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212 if #result > 0 then
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213 return result;
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214 elseif required then
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215 return nil, "Required value missing";
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216 end
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217 end
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218
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219 field_readers["text-multi"] =
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220 function (field_tag, required)
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221 local data, err = field_readers["list-multi"](field_tag, required);
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222 if data then
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223 data = t_concat(data, "\n");
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224 end
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225 return data, err;
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226 end
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227
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228 field_readers["list-single"] = simple_text;
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229
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230 local boolean_values = {
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231 ["1"] = true, ["true"] = true,
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232 ["0"] = false, ["false"] = false,
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233 };
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234
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235 field_readers["boolean"] =
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236 function (field_tag, required)
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237 local raw_value, err = simple_text(field_tag, required);
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238 if not raw_value then return raw_value, err; end
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239 local value = boolean_values[raw_value];
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240 if value == nil then
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241 return nil, "Invalid boolean representation:" .. raw_value;
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242 end
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243 return value;
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244 end
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245
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246 field_readers["hidden"] =
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247 function (field_tag)
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248 return field_tag:get_child_text("value");
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249 end
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250
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251 return {
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252 new = new;
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253 };
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254
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255
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256 --[=[
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257
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258 Layout:
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259 {
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260
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261 title = "MUC Configuration",
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262 instructions = [[Use this form to configure options for this MUC room.]],
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263
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264 { name = "FORM_TYPE", type = "hidden", required = true };
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265 { name = "field-name", type = "field-type", required = false };
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266 }
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267
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268
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269 --]=]