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teal-src/util/datamapper.tl

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teal-src/util/datamapper.tl @ 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
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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 local js = require "util.jsonschema"
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3
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4 local function toboolean ( s : string ) : boolean
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5 if s == "true" or s == "1" then
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6 return true
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7 elseif s == "false" or s == "0" then
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8 return false
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9 end
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10 end
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11
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12 local function parse_object (schema : js.schema_t, s : st.stanza_t) : table
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13 local out : { string : any } = {}
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14 if schema.properties then
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15 for prop, propschema in pairs(schema.properties) do
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16 -- TODO factor out, if it's generic enough
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17 local name = prop
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18 local namespace = s.attr.xmlns;
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19 local prefix : string = nil
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20 local is_attribute = false
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21 local is_text = false
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22
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23 local proptype : js.schema_t.type_e
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24 if propschema is js.schema_t then
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25 proptype = propschema.type
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26 elseif propschema is js.schema_t.type_e then
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27 proptype = propschema
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28 end
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29
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30 if propschema is js.schema_t and propschema.xml then
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31 if propschema.xml.name then
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32 name = propschema.xml.name
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33 end
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34 if propschema.xml.namespace then
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35 namespace = propschema.xml.namespace
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36 end
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37 if propschema.xml.prefix then
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38 prefix = propschema.xml.prefix
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39 end
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40 if propschema.xml.attribute then
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41 is_attribute = true
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42 elseif propschema.xml.text then
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43 is_text = true
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44 end
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45 end
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46
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47 if is_attribute then
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48 local attr = name
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49 if prefix then
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50 attr = prefix .. ':' .. name
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51 elseif namespace ~= s.attr.xmlns then
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52 attr = namespace .. "\1" .. name
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53 end
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54 if proptype == "string" then
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55 out[prop] = s.attr[attr]
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56 elseif proptype == "integer" or proptype == "number" then
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57 -- TODO floor if integer ?
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58 out[prop] = tonumber(s.attr[attr])
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59 elseif proptype == "boolean" then
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60 out[prop] = toboolean(s.attr[attr])
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61 -- else TODO
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62 end
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63
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64 elseif is_text then
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65 if proptype == "string" then
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66 out[prop] = s:get_text()
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67 elseif proptype == "integer" or proptype == "number" then
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68 out[prop] = tonumber(s:get_text())
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69 end
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70
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71 else
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72
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73 if proptype == "string" then
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74 out[prop] = s:get_child_text(name, namespace)
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75 elseif proptype == "integer" or proptype == "number" then
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76 out[prop] = tonumber(s:get_child_text(name, namespace))
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77 elseif proptype == "object" and propschema is js.schema_t then
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78 local c = s:get_child(name, namespace)
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79 if c then
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80 out[prop] = parse_object(propschema, c);
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81 end
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82 -- else TODO
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83 end
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84 end
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85 end
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86 end
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87
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88 return out
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89 end
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90
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91 local function parse (schema : js.schema_t, s : st.stanza_t) : table
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92 if schema.type == "object" then
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93 return parse_object(schema, s)
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94 end
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95 end
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96
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97 local function unparse ( schema : js.schema_t, t : table, current_name : string, current_ns : string ) : st.stanza_t
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98 if schema.type == "object" then
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99
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100 if schema.xml then
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101 if schema.xml.name then
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102 current_name = schema.xml.name
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103 end
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104 if schema.xml.namespace then
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105 current_ns = schema.xml.namespace
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106 end
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107 -- TODO prefix?
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108 end
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109
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110 local out = st.stanza(current_name, { xmlns = current_ns })
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111
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112 for prop, propschema in pairs(schema.properties) do
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113 local v = t[prop]
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114
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115 if v ~= nil then
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116 local proptype : js.schema_t.type_e
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117 if propschema is js.schema_t then
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118 proptype = propschema.type
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119 elseif propschema is js.schema_t.type_e then
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120 proptype = propschema
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121 end
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122
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123 local name = prop
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124 local namespace = current_ns
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125 local prefix : string = nil
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126 local is_attribute = false
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127 local is_text = false
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128
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129 if propschema is js.schema_t and propschema.xml then
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130
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131 if propschema.xml.name then
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132 name = propschema.xml.name
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133 end
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134 if propschema.xml.namespace then
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135 namespace = propschema.xml.namespace
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136 end
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137
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138 if propschema.xml.prefix then
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139 prefix = propschema.xml.prefix
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140 end
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141
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142 if propschema.xml.attribute then
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143 is_attribute = true
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144 elseif propschema.xml.text then
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145 is_text = true
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146 end
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147 end
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148
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149 if is_attribute then
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150 local attr = name
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151 if prefix then
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152 attr = prefix .. ':' .. name
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153 elseif namespace ~= current_ns then
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154 attr = namespace .. "\1" .. name
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155 end
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156
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157 if proptype == "string" and v is string then
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158 out.attr[attr] = v
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159 elseif proptype == "number" and v is number then
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160 out.attr[attr] = string.format("%g", v)
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161 elseif proptype == "integer" and v is number then
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162 out.attr[attr] = string.format("%d", v)
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163 elseif proptype == "boolean" then
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164 out.attr[attr] = v and "1" or "0"
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165 end
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166 elseif is_text then
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167 if v is string then
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
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168 out:text(v)
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169 end
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170 else
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171 local propattr : { string : string }
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172 if namespace ~= current_ns then
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173 propattr = { xmlns = namespace }
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Kim Alvefur <zash@zash.se>
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174 end
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175 if proptype == "string" and v is string then
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176 out:text_tag(name, v, propattr)
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177 elseif proptype == "number" and v is number then
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178 out:text_tag(name, string.format("%g", v), propattr)
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179 elseif proptype == "integer" and v is number then
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diff changeset
180 out:text_tag(name, string.format("%d", v), propattr)
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diff changeset
181 elseif proptype == "boolean" and v is boolean then
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parents: 11435
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182 out:text_tag(name, v and "1" or "0", propattr)
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183 elseif proptype == "object" and propschema is js.schema_t and v is table then
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
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parents: 11435
diff changeset
184 local c = unparse(propschema, v, name, namespace);
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
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185 if c then
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
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186 out:add_direct_child(c);
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
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187 end
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
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188 -- else TODO
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
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189 end
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
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diff changeset
190 end
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
parents: 11435
diff changeset
191 end
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
parents: 11435
diff changeset
192 end
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
parents: 11435
diff changeset
193 return out;
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
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diff changeset
194
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
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diff changeset
195 end
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
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diff changeset
196 end
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
parents: 11435
diff changeset
197
11435
a1fa6202fa13 util.datamapper: Library for extracting data from stanzas
Kim Alvefur <zash@zash.se>
parents:
diff changeset
198 return {
a1fa6202fa13 util.datamapper: Library for extracting data from stanzas
Kim Alvefur <zash@zash.se>
parents:
diff changeset
199 parse = parse,
11436
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diff changeset
200 unparse = unparse,
11435
a1fa6202fa13 util.datamapper: Library for extracting data from stanzas
Kim Alvefur <zash@zash.se>
parents:
diff changeset
201 }