prosody
9cc9b096c8f5
util/dataforms.lua

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util/dataforms.lua @ 1994:9cc9b096c8f5

modulemanager: Module loading rewritten to gracefully deal with errors in module initialization.
author Waqas Hussain <waqas20@gmail.com>
date Sun, 18 Oct 2009 05:17:07 +0500
parent 1958:e2b0026143c4
child 2061:e34fdca432a9
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rev   line source
1522
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1 -- Prosody IM
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2 -- Copyright (C) 2008-2009 Matthew Wild
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3 -- Copyright (C) 2008-2009 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 = tostring, type;
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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
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15 module "dataforms"
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16
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17 local xmlns_forms = 'jabber:x:data';
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18
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19 local form_t = {};
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20 local form_mt = { __index = form_t };
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21
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22 function new(layout)
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23 return setmetatable(layout, form_mt);
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24 end
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25
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26 function form_t.form(layout, data)
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27 local form = st.stanza("x", { xmlns = xmlns_forms, type = "form" });
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28 if layout.title then
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29 form:tag("title"):text(layout.title):up();
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30 end
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31 if layout.instructions then
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32 form:tag("instructions"):text(layout.instructions):up();
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33 end
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34 for n, field in ipairs(layout) do
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35 local field_type = field.type or "text-single";
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36 -- Add field tag
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37 form:tag("field", { type = field_type, var = field.name, label = field.label });
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38
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39 local value = (data and data[field.name]) or field.value;
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40
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41 -- Add value, depending on type
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42 if field_type == "hidden" then
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43 if type(value) == "table" then
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44 -- Assume an XML snippet
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45 form:tag("value")
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46 :add_child(value)
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47 :up();
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48 elseif value then
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49 form:tag("value"):text(tostring(value)):up();
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50 end
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51 elseif field_type == "boolean" then
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52 form:tag("value"):text((value and "1") or "0"):up();
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53 elseif field_type == "fixed" then
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54
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55 elseif field_type == "jid-multi" then
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56 for _, jid in ipairs(value) do
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57 form:tag("value"):text(jid):up();
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58 end
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59 elseif field_type == "jid-single" then
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60 form:tag("value"):text(value):up();
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61 elseif field_type == "text-single" or field_type == "text-private" then
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62 form:tag("value"):text(value):up();
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63 elseif field_type == "text-multi" then
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64 -- Split into multiple <value> tags, one for each line
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65 for line in value:gmatch("([^\r\n]+)\r?\n*") do
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66 form:tag("value"):text(line):up();
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67 end
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68 elseif field_type == "list-single" then
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69 for _, val in ipairs(value) do
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70 if type(val) == "table" then
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71 form:tag("option", { label = val.label }):tag("value"):text(val.value):up():up();
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72 else
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73 form:tag("option", { label= val }):tag("value"):text(tostring(val)):up():up();
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74 end
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75 end
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76 end
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77
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78 if field.required then
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79 form:tag("required"):up();
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80 end
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81
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82 -- Jump back up to list of fields
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83 form:up();
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84 end
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85 return form;
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86 end
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87
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88 local field_readers = {};
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89
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90 function form_t.data(layout, stanza)
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91 local data = {};
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92
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93 for field_tag in stanza:childtags() do
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94 local field_type = field_tag.attr.type;
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95
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96 local reader = field_readers[field_type];
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97 if reader then
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98 data[field_tag.attr.var] = reader(field_tag);
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99 end
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100
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101 end
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102 return data;
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103 end
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104
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105 field_readers["text-single"] =
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106 function (field_tag)
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107 local value = field_tag:child_with_name("value");
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108 if value then
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109 return value[1];
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110 end
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111 end
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112
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113 field_readers["text-private"] =
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114 field_readers["text-single"];
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115
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116 field_readers["jid-single"] =
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117 field_readers["text-single"];
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118
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119 field_readers["text-multi"] =
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120 function (field_tag)
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121 local result = {};
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122 for value_tag in field_tag:childtags() do
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123 if value_tag.name == "value" then
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124 result[#result+1] = value_tag[1];
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125 end
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126 end
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127 return t_concat(result, "\n");
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128 end
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129
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130 field_readers["list-single"] =
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131 field_readers["text-single"];
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132
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133 field_readers["boolean"] =
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134 function (field_tag)
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135 local value = field_tag:child_with_name("value");
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136 if value then
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137 if value[1] == "1" or value[1] == "true" then
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138 return true;
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139 else
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140 return false;
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141 end
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142 end
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143 end
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144
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145 field_readers["hidden"] =
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146 function (field_tag)
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147 local value = field_tag:child_with_name("value");
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148 if value then
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149 return value[1];
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150 end
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151 end
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152
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153 return _M;
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154
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156 --[=[
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157
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158 Layout:
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159 {
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160
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161 title = "MUC Configuration",
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162 instructions = [[Use this form to configure options for this MUC room.]],
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163
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164 { name = "FORM_TYPE", type = "hidden", required = true };
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165 { name = "field-name", type = "field-type", required = false };
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166 }
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167
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168
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169 --]=]