Fri, 15 Feb 2013 20:40:56 +0100
util.dataforms: Update from Prosody repo
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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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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 | --]=] |