prosody
5df9ffc25bb4
util/datamapper.lua

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util/datamapper.lua @ 11436:5df9ffc25bb4

util.datamapper: Add 'unparse' for turning tables into XML
author Kim Alvefur <zash@zash.se>
date Sun, 07 Mar 2021 00:57:36 +0100
parent 11435:a1fa6202fa13
child 11437:87a684df4b65
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
11435
a1fa6202fa13 util.datamapper: Library for extracting data from stanzas
Kim Alvefur <zash@zash.se>
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1 local st = require("util.stanza");
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2
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3 local function toboolean(s)
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4 if s == "true" or s == "1" then
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5 return true
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6 elseif s == "false" or s == "0" then
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7 return false
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8 end
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9 end
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10
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11 local function parse_object(schema, s)
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12 local out = {}
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13 if schema.properties then
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14 for prop, propschema in pairs(schema.properties) do
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15
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16 local name = prop
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17 local namespace = s.attr.xmlns;
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18 local prefix = nil
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19 local is_attribute = false
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20 local is_text = false
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21
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22 local proptype
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23 if type(propschema) == "table" then
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24 proptype = propschema.type
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25 elseif type(propschema) == "string" then
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26 proptype = propschema
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27 end
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28
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29 if type(propschema) == "table" and propschema.xml then
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30 if propschema.xml.name then
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31 name = propschema.xml.name
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32 end
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33 if propschema.xml.namespace then
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34 namespace = propschema.xml.namespace
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35 end
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36 if propschema.xml.prefix then
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37 prefix = propschema.xml.prefix
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38 end
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39 if propschema.xml.attribute then
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40 is_attribute = true
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41 elseif propschema.xml.text then
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42 is_text = true
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43 end
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44 end
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45
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46 if is_attribute then
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47 local attr = name
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48 if prefix then
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49 attr = prefix .. ":" .. name
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50 elseif namespace ~= s.attr.xmlns then
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51 attr = namespace .. "\1" .. name
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52 end
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53 if proptype == "string" then
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54 out[prop] = s.attr[attr]
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55 elseif proptype == "integer" or proptype == "number" then
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56
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57 out[prop] = tonumber(s.attr[attr])
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58 elseif proptype == "boolean" then
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59 out[prop] = toboolean(s.attr[attr])
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60
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61 end
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62
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63 elseif is_text then
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64 if proptype == "string" then
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65 out[prop] = s:get_text()
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66 elseif proptype == "integer" or proptype == "number" then
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67 out[prop] = tonumber(s:get_text())
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68 end
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69
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70 else
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71
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72 if proptype == "string" then
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73 out[prop] = s:get_child_text(name, namespace)
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74 elseif proptype == "integer" or proptype == "number" then
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75 out[prop] = tonumber(s:get_child_text(name, namespace))
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76 elseif proptype == "object" and type(propschema) == "table" then
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77 local c = s:get_child(name, namespace)
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78 if c then
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79 out[prop] = parse_object(propschema, c);
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80 end
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81
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82 end
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83 end
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84 end
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85 end
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86
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87 return out
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88 end
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89
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90 local function parse(schema, s)
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91 if schema.type == "object" then
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92 return parse_object(schema, s)
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93 end
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94 end
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95
11436
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96 local function unparse(schema, t, current_name, current_ns)
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97 if schema.type == "object" then
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98
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99 if schema.xml then
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100 if schema.xml.name then
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101 current_name = schema.xml.name
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102 end
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103 if schema.xml.namespace then
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104 current_ns = schema.xml.namespace
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105 end
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106
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107 end
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108
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109 local out = st.stanza(current_name, {xmlns = current_ns})
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110
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111 for prop, propschema in pairs(schema.properties) do
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112 local v = t[prop]
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113
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114 if v ~= nil then
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115 local proptype
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116 if type(propschema) == "table" then
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117 proptype = propschema.type
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118 elseif type(propschema) == "string" then
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119 proptype = propschema
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120 end
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121
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122 local name = prop
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123 local namespace = current_ns
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124 local prefix = nil
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125 local is_attribute = false
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126 local is_text = false
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127
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128 if type(propschema) == "table" and propschema.xml then
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129
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130 if propschema.xml.name then
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131 name = propschema.xml.name
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132 end
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133 if propschema.xml.namespace then
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134 namespace = propschema.xml.namespace
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135 end
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136
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137 if propschema.xml.prefix then
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138 prefix = propschema.xml.prefix
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139 end
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140
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141 if propschema.xml.attribute then
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142 is_attribute = true
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143 elseif propschema.xml.text then
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144 is_text = true
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145 end
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146 end
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147
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148 if is_attribute then
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149 local attr = name
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150 if prefix then
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151 attr = prefix .. ":" .. name
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152 elseif namespace ~= current_ns then
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153 attr = namespace .. "\1" .. name
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154 end
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155
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156 if proptype == "string" and type(v) == "string" then
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157 out.attr[attr] = v
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158 elseif proptype == "number" and type(v) == "number" then
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159 out.attr[attr] = string.format("%g", v)
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160 elseif proptype == "integer" and type(v) == "number" then
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161 out.attr[attr] = string.format("%d", v)
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162 elseif proptype == "boolean" then
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163 out.attr[attr] = v and "1" or "0"
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164 end
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165 elseif is_text then
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166 if type(v) == "string" then
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167 out:text(v)
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168 end
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169 else
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170 local propattr
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171 if namespace ~= current_ns then
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172 propattr = {xmlns = namespace}
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173 end
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174 if proptype == "string" and type(v) == "string" then
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175 out:text_tag(name, v, propattr)
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176 elseif proptype == "number" and type(v) == "number" then
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177 out:text_tag(name, string.format("%g", v), propattr)
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178 elseif proptype == "integer" and type(v) == "number" then
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179 out:text_tag(name, string.format("%d", v), propattr)
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180 elseif proptype == "boolean" and type(v) == "boolean" then
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181 out:text_tag(name, v and "1" or "0", propattr)
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182 elseif proptype == "object" and type(propschema) == "table" and type(v) == "table" then
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183 local c = unparse(propschema, v, name, namespace);
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184 if c then
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
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185 out:add_direct_child(c);
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186 end
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187
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188 end
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Kim Alvefur <zash@zash.se>
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189 end
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Kim Alvefur <zash@zash.se>
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190 end
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Kim Alvefur <zash@zash.se>
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diff changeset
191 end
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Kim Alvefur <zash@zash.se>
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diff changeset
192 return out
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Kim Alvefur <zash@zash.se>
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diff changeset
193
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diff changeset
194 end
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195 end
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196
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
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197 return {parse = parse; unparse = unparse}