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util/dataforms.lua

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util/dataforms.lua @ 335:9e69ee8542d4

util.dataforms: Add method for converting XML dataforms to tables
author Kim Alvefur <zash@zash.se>
date Fri, 15 Feb 2013 20:45:31 +0100
parent 334:34c52f3b21c4
child 441:e4c0b1d7fd6b
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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, 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 from_stanza(stanza)
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28 local layout = {
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29 title = stanza:get_child_text("title");
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30 instructions = stanza:get_child_text("instructions");
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31 };
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32 for tag in stanza:childtags("field") do
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33 local field = {
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34 name = tag.attr.var;
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35 label = tag.attr.label;
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36 type = tag.attr.type;
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37 required = tag:get_child("required") and true or nil;
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38 value = tag:get_child_text("value");
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39 };
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40 layout[#layout+1] = field;
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41 if field.type then
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42 local value = {};
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43 if field.type:match"list%-" then
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44 for tag in tag:childtags("option") do
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45 value[#value+1] = { label = tag.attr.label, value = tag:get_child_text("value") };
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46 end
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47 for tag in tag:childtags("value") do
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48 value[#value+1] = { label = tag.attr.label, value = tag:get_text(), default = true };
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49 end
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50 elseif field.type:match"%-multi" then
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51 for tag in tag:childtags("value") do
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52 value[#value+1] = tag.attr.label and { label = tag.attr.label, value = tag:get_text() } or tag:get_text();
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53 end
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54 if field.type == "text-multi" then
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55 field.value = t_concat(value, "\n");
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56 else
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57 field.value = value;
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58 end
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59 end
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60 end
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61 end
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62 return new(layout);
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63 end
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64
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65 function form_t.form(layout, data, formtype)
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66 local form = st.stanza("x", { xmlns = xmlns_forms, type = formtype or "form" });
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67 if layout.title then
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68 form:tag("title"):text(layout.title):up();
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69 end
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70 if layout.instructions then
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71 form:tag("instructions"):text(layout.instructions):up();
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72 end
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73 for n, field in ipairs(layout) do
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74 local field_type = field.type or "text-single";
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75 -- Add field tag
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76 form:tag("field", { type = field_type, var = field.name, label = field.label });
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77
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78 local value = (data and data[field.name]) or field.value;
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79
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80 if value then
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81 -- Add value, depending on type
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82 if field_type == "hidden" then
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83 if type(value) == "table" then
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84 -- Assume an XML snippet
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85 form:tag("value")
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86 :add_child(value)
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87 :up();
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88 else
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89 form:tag("value"):text(tostring(value)):up();
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90 end
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91 elseif field_type == "boolean" then
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92 form:tag("value"):text((value and "1") or "0"):up();
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93 elseif field_type == "fixed" then
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94
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95 elseif field_type == "jid-multi" then
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96 for _, jid in ipairs(value) do
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97 form:tag("value"):text(jid):up();
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98 end
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99 elseif field_type == "jid-single" then
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100 form:tag("value"):text(value):up();
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101 elseif field_type == "text-single" or field_type == "text-private" then
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102 form:tag("value"):text(value):up();
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103 elseif field_type == "text-multi" then
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104 -- Split into multiple <value> tags, one for each line
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105 for line in value:gmatch("([^\r\n]+)\r?\n*") do
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106 form:tag("value"):text(line):up();
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107 end
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108 elseif field_type == "list-single" then
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109 local has_default = false;
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110 for _, val in ipairs(value) do
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111 if type(val) == "table" then
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112 form:tag("option", { label = val.label }):tag("value"):text(val.value):up():up();
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113 if val.default and (not has_default) then
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114 form:tag("value"):text(val.value):up();
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115 has_default = true;
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116 end
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117 else
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118 form:tag("option", { label= val }):tag("value"):text(tostring(val)):up():up();
123
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119 end
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120 end
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121 elseif field_type == "list-multi" then
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122 for _, val in ipairs(value) do
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123 if type(val) == "table" then
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124 form:tag("option", { label = val.label }):tag("value"):text(val.value):up():up();
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125 if val.default then
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126 form:tag("value"):text(val.value):up();
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127 end
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128 else
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129 form:tag("option", { label= val }):tag("value"):text(tostring(val)):up():up();
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130 end
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131 end
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132 end
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133 end
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134
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135 if field.required then
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136 form:tag("required"):up();
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137 end
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138
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139 -- Jump back up to list of fields
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140 form:up();
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141 end
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142 return form;
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143 end
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144
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145 local field_readers = {};
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146
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147 function form_t.data(layout, stanza)
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148 local data = {};
334
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149 local errors = {};
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150
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diff changeset
151 for _, field in ipairs(layout) do
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152 local tag;
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153 for field_tag in stanza:childtags() do
123
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154 if field.name == field_tag.attr.var then
334
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155 tag = field_tag;
123
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156 break;
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157 end
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parents:
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158 end
334
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parents: 123
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159
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160 if not tag then
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161 if field.required then
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162 errors[field.name] = "Required value missing";
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163 end
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parents: 123
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164 else
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165 local reader = field_readers[field.type];
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166 if reader then
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167 data[field.name], errors[field.name] = reader(tag, field.required);
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168 end
123
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parents:
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169 end
334
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170 end
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parents: 123
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171 if next(errors) then
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172 return data, errors;
123
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173 end
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174 return data;
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175 end
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176
334
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177 field_readers["text-single"] =
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178 function (field_tag, required)
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179 local data = field_tag:get_child_text("value");
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180 if data and #data > 0 then
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181 return data
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182 elseif required then
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183 return nil, "Required value missing";
123
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184 end
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185 end
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186
334
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187 field_readers["text-private"] =
123
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188 field_readers["text-single"];
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189
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190 field_readers["jid-single"] =
334
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191 function (field_tag, required)
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192 local raw_data = field_tag:get_child_text("value")
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193 local data = jid_prep(raw_data);
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194 if data and #data > 0 then
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195 return data
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parents: 123
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196 elseif raw_data then
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197 return nil, "Invalid JID: " .. raw_data;
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parents: 123
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198 elseif required then
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199 return nil, "Required value missing";
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parents: 123
diff changeset
200 end
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parents: 123
diff changeset
201 end
123
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202
334
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diff changeset
203 field_readers["jid-multi"] =
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204 function (field_tag, required)
123
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205 local result = {};
334
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206 local err = {};
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parents: 123
diff changeset
207 for value_tag in field_tag:childtags("value") do
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diff changeset
208 local raw_value = value_tag:get_text();
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diff changeset
209 local value = jid_prep(raw_value);
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diff changeset
210 result[#result+1] = value;
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diff changeset
211 if raw_value and not value then
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diff changeset
212 err[#err+1] = ("Invalid JID: " .. raw_value);
123
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parents:
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213 end
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parents:
diff changeset
214 end
334
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parents: 123
diff changeset
215 if #result > 0 then
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diff changeset
216 return result, (#err > 0 and t_concat(err, "\n") or nil);
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parents: 123
diff changeset
217 elseif required then
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parents: 123
diff changeset
218 return nil, "Required value missing";
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parents: 123
diff changeset
219 end
123
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parents:
diff changeset
220 end
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parents:
diff changeset
221
334
34c52f3b21c4 util.dataforms: Update from Prosody repo
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diff changeset
222 field_readers["list-multi"] =
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parents: 123
diff changeset
223 function (field_tag, required)
123
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parents:
diff changeset
224 local result = {};
334
34c52f3b21c4 util.dataforms: Update from Prosody repo
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parents: 123
diff changeset
225 for value in field_tag:childtags("value") do
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parents: 123
diff changeset
226 result[#result+1] = value:get_text();
123
8a079aa70b84 util.dataforms, squishy: Add util.dataforms library
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parents:
diff changeset
227 end
334
34c52f3b21c4 util.dataforms: Update from Prosody repo
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parents: 123
diff changeset
228 return result, (required and #result == 0 and "Required value missing" or nil);
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parents: 123
diff changeset
229 end
34c52f3b21c4 util.dataforms: Update from Prosody repo
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parents: 123
diff changeset
230
34c52f3b21c4 util.dataforms: Update from Prosody repo
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parents: 123
diff changeset
231 field_readers["text-multi"] =
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parents: 123
diff changeset
232 function (field_tag, required)
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parents: 123
diff changeset
233 local data, err = field_readers["list-multi"](field_tag, required);
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parents: 123
diff changeset
234 if data then
34c52f3b21c4 util.dataforms: Update from Prosody repo
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parents: 123
diff changeset
235 data = t_concat(data, "\n");
34c52f3b21c4 util.dataforms: Update from Prosody repo
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parents: 123
diff changeset
236 end
34c52f3b21c4 util.dataforms: Update from Prosody repo
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parents: 123
diff changeset
237 return data, err;
123
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parents:
diff changeset
238 end
8a079aa70b84 util.dataforms, squishy: Add util.dataforms library
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parents:
diff changeset
239
8a079aa70b84 util.dataforms, squishy: Add util.dataforms library
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parents:
diff changeset
240 field_readers["list-single"] =
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parents:
diff changeset
241 field_readers["text-single"];
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diff changeset
242
334
34c52f3b21c4 util.dataforms: Update from Prosody repo
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parents: 123
diff changeset
243 local boolean_values = {
34c52f3b21c4 util.dataforms: Update from Prosody repo
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parents: 123
diff changeset
244 ["1"] = true, ["true"] = true,
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parents: 123
diff changeset
245 ["0"] = false, ["false"] = false,
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parents: 123
diff changeset
246 };
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parents: 123
diff changeset
247
34c52f3b21c4 util.dataforms: Update from Prosody repo
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parents: 123
diff changeset
248 field_readers["boolean"] =
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Kim Alvefur <zash@zash.se>
parents: 123
diff changeset
249 function (field_tag, required)
34c52f3b21c4 util.dataforms: Update from Prosody repo
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parents: 123
diff changeset
250 local raw_value = field_tag:get_child_text("value");
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parents: 123
diff changeset
251 local value = boolean_values[raw_value ~= nil and raw_value];
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parents: 123
diff changeset
252 if value ~= nil then
34c52f3b21c4 util.dataforms: Update from Prosody repo
Kim Alvefur <zash@zash.se>
parents: 123
diff changeset
253 return value;
34c52f3b21c4 util.dataforms: Update from Prosody repo
Kim Alvefur <zash@zash.se>
parents: 123
diff changeset
254 elseif raw_value then
34c52f3b21c4 util.dataforms: Update from Prosody repo
Kim Alvefur <zash@zash.se>
parents: 123
diff changeset
255 return nil, "Invalid boolean representation";
34c52f3b21c4 util.dataforms: Update from Prosody repo
Kim Alvefur <zash@zash.se>
parents: 123
diff changeset
256 elseif required then
34c52f3b21c4 util.dataforms: Update from Prosody repo
Kim Alvefur <zash@zash.se>
parents: 123
diff changeset
257 return nil, "Required value missing";
123
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parents:
diff changeset
258 end
8a079aa70b84 util.dataforms, squishy: Add util.dataforms library
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parents:
diff changeset
259 end
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parents:
diff changeset
260
334
34c52f3b21c4 util.dataforms: Update from Prosody repo
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parents: 123
diff changeset
261 field_readers["hidden"] =
123
8a079aa70b84 util.dataforms, squishy: Add util.dataforms library
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parents:
diff changeset
262 function (field_tag)
334
34c52f3b21c4 util.dataforms: Update from Prosody repo
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parents: 123
diff changeset
263 return field_tag:get_child_text("value");
123
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parents:
diff changeset
264 end
8a079aa70b84 util.dataforms, squishy: Add util.dataforms library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
265
8a079aa70b84 util.dataforms, squishy: Add util.dataforms library
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parents:
diff changeset
266 return _M;
8a079aa70b84 util.dataforms, squishy: Add util.dataforms library
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parents:
diff changeset
267
8a079aa70b84 util.dataforms, squishy: Add util.dataforms library
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parents:
diff changeset
268
8a079aa70b84 util.dataforms, squishy: Add util.dataforms library
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parents:
diff changeset
269 --[=[
8a079aa70b84 util.dataforms, squishy: Add util.dataforms library
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parents:
diff changeset
270
8a079aa70b84 util.dataforms, squishy: Add util.dataforms library
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parents:
diff changeset
271 Layout:
8a079aa70b84 util.dataforms, squishy: Add util.dataforms library
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parents:
diff changeset
272 {
8a079aa70b84 util.dataforms, squishy: Add util.dataforms library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
273
8a079aa70b84 util.dataforms, squishy: Add util.dataforms library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
274 title = "MUC Configuration",
8a079aa70b84 util.dataforms, squishy: Add util.dataforms library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
275 instructions = [[Use this form to configure options for this MUC room.]],
8a079aa70b84 util.dataforms, squishy: Add util.dataforms library
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parents:
diff changeset
276
8a079aa70b84 util.dataforms, squishy: Add util.dataforms library
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parents:
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277 { name = "FORM_TYPE", type = "hidden", required = true };
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parents:
diff changeset
278 { name = "field-name", type = "field-type", required = false };
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parents:
diff changeset
279 }
8a079aa70b84 util.dataforms, squishy: Add util.dataforms library
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parents:
diff changeset
280
8a079aa70b84 util.dataforms, squishy: Add util.dataforms library
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parents:
diff changeset
281
8a079aa70b84 util.dataforms, squishy: Add util.dataforms library
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parents:
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282 --]=]