prosody
285075a27f28
util/dataforms.lua

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util/dataforms.lua @ 8727:285075a27f28

luacheckrc: No longer ignore use of the global 'server' (net.server)
author Kim Alvefur <zash@zash.se>
date Thu, 05 Apr 2018 19:37:32 +0200
parent 8555:4f0f5b49bb03
child 8863:64fa8d80c09f
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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 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 -- luacheck: std none
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18
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19 local xmlns_forms = 'jabber:x:data';
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20
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21 local form_t = {};
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22 local form_mt = { __index = form_t };
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23
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24 local function new(layout)
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25 return setmetatable(layout, form_mt);
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26 end
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27
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28 function form_t.form(layout, data, formtype)
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29 local form = st.stanza("x", { xmlns = xmlns_forms, type = formtype or "form" });
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30 if layout.title then
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31 form:tag("title"):text(layout.title):up();
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32 end
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33 if layout.instructions then
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34 form:tag("instructions"):text(layout.instructions):up();
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35 end
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36 for _, field in ipairs(layout) do
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37 local field_type = field.type or "text-single";
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38 -- Add field tag
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39 form:tag("field", { type = field_type, var = field.name, label = field.label });
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40
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41 local value = (data and data[field.name]) or field.value;
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42
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43 if value then
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44 -- Add value, depending on type
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45 if field_type == "hidden" then
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46 if type(value) == "table" then
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47 -- Assume an XML snippet
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48 form:tag("value")
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49 :add_child(value)
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50 :up();
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51 else
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52 form:tag("value"):text(tostring(value)):up();
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53 end
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54 elseif field_type == "boolean" then
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55 form:tag("value"):text((value and "1") or "0"):up();
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56 elseif field_type == "fixed" then
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57 form:tag("value"):text(value):up();
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58 elseif field_type == "jid-multi" then
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59 for _, jid in ipairs(value) do
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60 form:tag("value"):text(jid):up();
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61 end
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62 elseif field_type == "jid-single" then
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63 form:tag("value"):text(value):up();
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64 elseif field_type == "text-single" or field_type == "text-private" then
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65 form:tag("value"):text(value):up();
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66 elseif field_type == "text-multi" then
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67 -- Split into multiple <value> tags, one for each line
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68 for line in value:gmatch("([^\r\n]+)\r?\n*") do
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69 form:tag("value"):text(line):up();
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70 end
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71 elseif field_type == "list-single" then
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72 if formtype ~= "result" then
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73 local has_default = false;
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74 for _, val in ipairs(field.options or 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 value == val.value or 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 if (field.options or formtype == "result") and value then
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87 form:tag("value"):text(value):up();
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88 end
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89 elseif field_type == "list-multi" then
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90 if formtype ~= "result" then
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91 for _, val in ipairs(field.options or value) do
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92 if type(val) == "table" then
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93 form:tag("option", { label = val.label }):tag("value"):text(val.value):up():up();
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94 if not field.options and val.default then
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95 form:tag("value"):text(val.value):up();
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96 end
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97 else
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98 form:tag("option", { label= val }):tag("value"):text(tostring(val)):up():up();
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99 end
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100 end
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101 end
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102 if (field.options or formtype == "result") and value then
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103 for _, val in ipairs(value) do
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104 form:tag("value"):text(val):up();
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105 end
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106 end
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107 end
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108 end
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109
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110 local media = field.media;
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111 if media then
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112 form:tag("media", { xmlns = "urn:xmpp:media-element", height = media.height, width = media.width });
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113 for _, val in ipairs(media) do
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114 form:tag("uri", { type = val.type }):text(val.uri):up()
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115 end
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116 form:up();
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117 end
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118
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119 if field.required then
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120 form:tag("required"):up();
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121 end
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122
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123 -- Jump back up to list of fields
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124 form:up();
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125 end
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126 return form;
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127 end
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128
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129 local field_readers = {};
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130
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131 function form_t.data(layout, stanza)
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132 local data = {};
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133 local errors = {};
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134 local present = {};
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135
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136 for _, field in ipairs(layout) do
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137 local tag;
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138 for field_tag in stanza:childtags("field") do
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139 if field.name == field_tag.attr.var then
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140 tag = field_tag;
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141 break;
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142 end
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143 end
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144
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145 if not tag then
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146 if field.required then
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147 errors[field.name] = "Required value missing";
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148 end
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149 else
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150 present[field.name] = true;
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151 local reader = field_readers[field.type];
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152 if reader then
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153 data[field.name], errors[field.name] = reader(tag, field.required);
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154 end
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155 end
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156 end
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157 if next(errors) then
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158 return data, errors, present;
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159 end
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160 return data, nil, present;
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161 end
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162
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163 local function simple_text(field_tag, required)
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164 local data = field_tag:get_child_text("value");
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165 -- XEP-0004 does not say if an empty string is acceptable for a required value
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166 -- so we will follow HTML5 which says that empty string means missing
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167 if required and (data == nil or data == "") then
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168 return nil, "Required value missing";
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169 end
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170 return data; -- Return whatever get_child_text returned, even if empty string
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171 end
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172
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173 field_readers["text-single"] = simple_text;
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174
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175 field_readers["text-private"] = simple_text;
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176
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177 field_readers["jid-single"] =
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178 function (field_tag, required)
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179 local raw_data, err = simple_text(field_tag, required);
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180 if not raw_data then return raw_data, err; end
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181 local data = jid_prep(raw_data);
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182 if not data then
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183 return nil, "Invalid JID: " .. raw_data;
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184 end
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185 return data;
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186 end
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187
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188 field_readers["jid-multi"] =
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189 function (field_tag, required)
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190 local result = {};
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191 local err = {};
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192 for value_tag in field_tag:childtags("value") do
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193 local raw_value = value_tag:get_text();
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194 local value = jid_prep(raw_value);
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195 result[#result+1] = value;
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196 if raw_value and not value then
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197 err[#err+1] = ("Invalid JID: " .. raw_value);
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198 end
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199 end
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200 if #result > 0 then
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201 return result, (#err > 0 and t_concat(err, "\n") or nil);
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202 elseif required then
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203 return nil, "Required value missing";
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204 end
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205 end
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206
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207 field_readers["list-multi"] =
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208 function (field_tag, required)
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209 local result = {};
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210 for value in field_tag:childtags("value") do
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211 result[#result+1] = value:get_text();
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212 end
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213 if #result > 0 then
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214 return result;
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215 elseif required then
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216 return nil, "Required value missing";
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217 end
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218 end
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219
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220 field_readers["text-multi"] =
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221 function (field_tag, required)
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222 local data, err = field_readers["list-multi"](field_tag, required);
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223 if data then
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224 data = t_concat(data, "\n");
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225 end
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226 return data, err;
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227 end
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228
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229 field_readers["list-single"] = simple_text;
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230
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231 local boolean_values = {
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232 ["1"] = true, ["true"] = true,
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233 ["0"] = false, ["false"] = false,
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234 };
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235
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236 field_readers["boolean"] =
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237 function (field_tag, required)
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238 local raw_value, err = simple_text(field_tag, required);
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239 if not raw_value then return raw_value, err; end
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240 local value = boolean_values[raw_value];
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241 if value == nil then
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242 return nil, "Invalid boolean representation:" .. raw_value;
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243 end
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244 return value;
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245 end
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246
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247 field_readers["hidden"] =
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248 function (field_tag)
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249 return field_tag:get_child_text("value");
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250 end
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251
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252 return {
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253 new = new;
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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
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259 Layout:
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260 {
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261
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262 title = "MUC Configuration",
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263 instructions = [[Use this form to configure options for this MUC room.]],
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264
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265 { name = "FORM_TYPE", type = "hidden", required = true };
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266 { name = "field-name", type = "field-type", required = false };
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267 }
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268
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269
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270 --]=]