prosody
1d9c1893cc5e
util/datamapper.lua

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util/datamapper.lua @ 11454:1d9c1893cc5e

util.datamapper: Use enum instead of mutually exclusive booleans Cleaner and rules out invalid combinations.
author Kim Alvefur <zash@zash.se>
date Sun, 14 Mar 2021 01:57:00 +0100
parent 11453:f0037234b2e9
child 11455:a5050e21ab08
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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 value_goes = {}
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12
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13 local function parse_object(schema, s)
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14 local out = {}
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15 if schema.properties then
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16 for prop, propschema in pairs(schema.properties) do
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17
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18 local name = prop
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19 local namespace = s.attr.xmlns;
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20 local prefix = nil
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21 local value_where = "in_text_tag"
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22 local single_attribute
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23 local enums
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24
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25 local proptype
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26 if type(propschema) == "table" then
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27 proptype = propschema.type
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28 elseif type(propschema) == "string" then
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29 proptype = propschema
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30 end
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31
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32 if type(propschema) == "table" and propschema.xml then
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33 if propschema.xml.name then
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34 name = propschema.xml.name
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35 end
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36 if propschema.xml.namespace then
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37 namespace = propschema.xml.namespace
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38 end
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39 if propschema.xml.prefix then
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40 prefix = propschema.xml.prefix
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41 end
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42 if propschema.xml.attribute then
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43 value_where = "in_attribute"
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44 elseif propschema.xml.text then
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45
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46 value_where = "in_text"
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47 elseif propschema.xml.x_name_is_value then
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48
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49 value_where = "in_tag_name"
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50 elseif propschema.xml.x_single_attribute then
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51
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52 single_attribute = propschema.xml.x_single_attribute
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53 value_where = "in_single_attribute"
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54 end
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55 if propschema["const"] then
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56 enums = {propschema["const"]}
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57 elseif propschema["enum"] then
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58 enums = propschema["enum"]
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59 end
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60 end
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61
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62 if value_where == "in_tag_name" then
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63 local c
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64 if proptype == "boolean" then
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65 c = s:get_child(name, namespace);
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66 elseif enums and proptype == "string" then
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67
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68 for i = 1, #enums do
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69 c = s:get_child(enums[i], namespace);
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70 if c then
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71 break
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72 end
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73 end
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74 else
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75 c = s:get_child(nil, namespace);
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76 end
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77 if c and proptype == "string" then
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78 out[prop] = c.name;
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79 elseif proptype == "boolean" and c then
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80 out[prop] = true;
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81 end
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82 elseif value_where == "in_attribute" then
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83 local attr = name
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84 if prefix then
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85 attr = prefix .. ":" .. name
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86 elseif namespace ~= s.attr.xmlns then
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87 attr = namespace .. "\1" .. name
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88 end
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89 if proptype == "string" then
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90 out[prop] = s.attr[attr]
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91 elseif proptype == "integer" or proptype == "number" then
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92
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93 out[prop] = tonumber(s.attr[attr])
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94 elseif proptype == "boolean" then
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95 out[prop] = toboolean(s.attr[attr])
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96
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97 end
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98
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99 elseif value_where == "in_text" then
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100 if proptype == "string" then
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101 out[prop] = s:get_text()
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102 elseif proptype == "integer" or proptype == "number" then
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103 out[prop] = tonumber(s:get_text())
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104 end
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105
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106 elseif value_where == "in_single_attribute" then
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107 local c = s:get_child(name, namespace)
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108 local a = c and c.attr[single_attribute]
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109 if proptype == "string" then
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110 out[prop] = a
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111 elseif proptype == "integer" or proptype == "number" then
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112 out[prop] = tonumber(a)
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113 elseif proptype == "boolean" then
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114 out[prop] = toboolean(a)
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115 end
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116 else
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117
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118 if proptype == "string" then
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119 out[prop] = s:get_child_text(name, namespace)
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120 elseif proptype == "integer" or proptype == "number" then
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121 out[prop] = tonumber(s:get_child_text(name, namespace))
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122 elseif proptype == "object" and type(propschema) == "table" then
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123 local c = s:get_child(name, namespace)
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124 if c then
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125 out[prop] = parse_object(propschema, c);
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126 end
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127
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128 end
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129 end
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130 end
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131 end
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132
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133 return out
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134 end
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135
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136 local function parse(schema, s)
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
137 if schema.type == "object" then
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parents:
diff changeset
138 return parse_object(schema, s)
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parents:
diff changeset
139 end
a1fa6202fa13 util.datamapper: Library for extracting data from stanzas
Kim Alvefur <zash@zash.se>
parents:
diff changeset
140 end
a1fa6202fa13 util.datamapper: Library for extracting data from stanzas
Kim Alvefur <zash@zash.se>
parents:
diff changeset
141
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142 local function unparse(schema, t, current_name, current_ns)
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diff changeset
143 if schema.type == "object" then
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Kim Alvefur <zash@zash.se>
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diff changeset
144
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diff changeset
145 if schema.xml then
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
parents: 11435
diff changeset
146 if schema.xml.name then
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147 current_name = schema.xml.name
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diff changeset
148 end
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Kim Alvefur <zash@zash.se>
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diff changeset
149 if schema.xml.namespace then
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diff changeset
150 current_ns = schema.xml.namespace
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diff changeset
151 end
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152
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Kim Alvefur <zash@zash.se>
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153 end
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Kim Alvefur <zash@zash.se>
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diff changeset
154
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Kim Alvefur <zash@zash.se>
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diff changeset
155 local out = st.stanza(current_name, {xmlns = current_ns})
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diff changeset
156
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diff changeset
157 for prop, propschema in pairs(schema.properties) do
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diff changeset
158 local v = t[prop]
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diff changeset
159
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
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diff changeset
160 if v ~= nil then
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
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diff changeset
161 local proptype
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
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diff changeset
162 if type(propschema) == "table" then
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163 proptype = propschema.type
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diff changeset
164 elseif type(propschema) == "string" then
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165 proptype = propschema
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Kim Alvefur <zash@zash.se>
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166 end
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Kim Alvefur <zash@zash.se>
parents: 11435
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167
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Kim Alvefur <zash@zash.se>
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diff changeset
168 local name = prop
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Kim Alvefur <zash@zash.se>
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169 local namespace = current_ns
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Kim Alvefur <zash@zash.se>
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170 local prefix = nil
11454
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171 local value_where = "in_text_tag"
11439
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172 local single_attribute
11436
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173
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diff changeset
174 if type(propschema) == "table" and propschema.xml then
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
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diff changeset
175
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
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diff changeset
176 if propschema.xml.name then
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Kim Alvefur <zash@zash.se>
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diff changeset
177 name = propschema.xml.name
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diff changeset
178 end
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diff changeset
179 if propschema.xml.namespace then
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
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diff changeset
180 namespace = propschema.xml.namespace
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
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diff changeset
181 end
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Kim Alvefur <zash@zash.se>
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diff changeset
182
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diff changeset
183 if propschema.xml.prefix then
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
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parents: 11435
diff changeset
184 prefix = propschema.xml.prefix
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Kim Alvefur <zash@zash.se>
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diff changeset
185 end
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Kim Alvefur <zash@zash.se>
parents: 11435
diff changeset
186
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diff changeset
187 if propschema.xml.attribute then
11454
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diff changeset
188 value_where = "in_attribute"
11436
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189 elseif propschema.xml.text then
11454
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diff changeset
190 value_where = "in_text"
11437
87a684df4b65 util.datamapper: Invent extension for using tag name as value
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diff changeset
191 elseif propschema.xml.x_name_is_value then
11454
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diff changeset
192 value_where = "in_tag_name"
11439
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diff changeset
193 elseif propschema.xml.x_single_attribute then
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194 single_attribute = propschema.xml.x_single_attribute
11454
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195 value_where = "in_single_attribute"
11436
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196 end
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Kim Alvefur <zash@zash.se>
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197 end
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Kim Alvefur <zash@zash.se>
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diff changeset
198
11454
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diff changeset
199 if value_where == "in_attribute" then
11436
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diff changeset
200 local attr = name
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
parents: 11435
diff changeset
201 if prefix then
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
parents: 11435
diff changeset
202 attr = prefix .. ":" .. name
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
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diff changeset
203 elseif namespace ~= current_ns then
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
parents: 11435
diff changeset
204 attr = namespace .. "\1" .. name
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
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diff changeset
205 end
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
parents: 11435
diff changeset
206
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
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diff changeset
207 if proptype == "string" and type(v) == "string" then
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
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parents: 11435
diff changeset
208 out.attr[attr] = v
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
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diff changeset
209 elseif proptype == "number" and type(v) == "number" then
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
parents: 11435
diff changeset
210 out.attr[attr] = string.format("%g", v)
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
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parents: 11435
diff changeset
211 elseif proptype == "integer" and type(v) == "number" then
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
parents: 11435
diff changeset
212 out.attr[attr] = string.format("%d", v)
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
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diff changeset
213 elseif proptype == "boolean" then
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
parents: 11435
diff changeset
214 out.attr[attr] = v and "1" or "0"
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
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parents: 11435
diff changeset
215 end
11454
1d9c1893cc5e util.datamapper: Use enum instead of mutually exclusive booleans
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216 elseif value_where == "in_text" then
11436
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
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parents: 11435
diff changeset
217 if type(v) == "string" then
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
parents: 11435
diff changeset
218 out:text(v)
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
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parents: 11435
diff changeset
219 end
11454
1d9c1893cc5e util.datamapper: Use enum instead of mutually exclusive booleans
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diff changeset
220 elseif value_where == "in_single_attribute" then
11439
9abcdfdcdb01 util.datamapper: Add support for mapping of elements where only one attribute matters
Kim Alvefur <zash@zash.se>
parents: 11438
diff changeset
221 local propattr = {}
9abcdfdcdb01 util.datamapper: Add support for mapping of elements where only one attribute matters
Kim Alvefur <zash@zash.se>
parents: 11438
diff changeset
222
9abcdfdcdb01 util.datamapper: Add support for mapping of elements where only one attribute matters
Kim Alvefur <zash@zash.se>
parents: 11438
diff changeset
223 if namespace ~= current_ns then
9abcdfdcdb01 util.datamapper: Add support for mapping of elements where only one attribute matters
Kim Alvefur <zash@zash.se>
parents: 11438
diff changeset
224 propattr.xmlns = namespace
9abcdfdcdb01 util.datamapper: Add support for mapping of elements where only one attribute matters
Kim Alvefur <zash@zash.se>
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diff changeset
225 end
9abcdfdcdb01 util.datamapper: Add support for mapping of elements where only one attribute matters
Kim Alvefur <zash@zash.se>
parents: 11438
diff changeset
226
9abcdfdcdb01 util.datamapper: Add support for mapping of elements where only one attribute matters
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parents: 11438
diff changeset
227 if proptype == "string" and type(v) == "string" then
9abcdfdcdb01 util.datamapper: Add support for mapping of elements where only one attribute matters
Kim Alvefur <zash@zash.se>
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diff changeset
228 propattr[single_attribute] = v
9abcdfdcdb01 util.datamapper: Add support for mapping of elements where only one attribute matters
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diff changeset
229 elseif proptype == "number" and type(v) == "number" then
9abcdfdcdb01 util.datamapper: Add support for mapping of elements where only one attribute matters
Kim Alvefur <zash@zash.se>
parents: 11438
diff changeset
230 propattr[single_attribute] = string.format("%g", v)
9abcdfdcdb01 util.datamapper: Add support for mapping of elements where only one attribute matters
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parents: 11438
diff changeset
231 elseif proptype == "integer" and type(v) == "number" then
9abcdfdcdb01 util.datamapper: Add support for mapping of elements where only one attribute matters
Kim Alvefur <zash@zash.se>
parents: 11438
diff changeset
232 propattr[single_attribute] = string.format("%d", v)
9abcdfdcdb01 util.datamapper: Add support for mapping of elements where only one attribute matters
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parents: 11438
diff changeset
233 elseif proptype == "boolean" and type(v) == "boolean" then
9abcdfdcdb01 util.datamapper: Add support for mapping of elements where only one attribute matters
Kim Alvefur <zash@zash.se>
parents: 11438
diff changeset
234 propattr[single_attribute] = v and "1" or "0"
9abcdfdcdb01 util.datamapper: Add support for mapping of elements where only one attribute matters
Kim Alvefur <zash@zash.se>
parents: 11438
diff changeset
235 end
9abcdfdcdb01 util.datamapper: Add support for mapping of elements where only one attribute matters
Kim Alvefur <zash@zash.se>
parents: 11438
diff changeset
236 out:tag(name, propattr):up();
9abcdfdcdb01 util.datamapper: Add support for mapping of elements where only one attribute matters
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parents: 11438
diff changeset
237
11436
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diff changeset
238 else
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
parents: 11435
diff changeset
239 local propattr
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
parents: 11435
diff changeset
240 if namespace ~= current_ns then
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
parents: 11435
diff changeset
241 propattr = {xmlns = namespace}
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
parents: 11435
diff changeset
242 end
11454
1d9c1893cc5e util.datamapper: Use enum instead of mutually exclusive booleans
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diff changeset
243 if value_where == "in_tag_name" then
11438
b7807583de34 util.datamapper: Add logic for "boolean" tags here the presence means true
Kim Alvefur <zash@zash.se>
parents: 11437
diff changeset
244 if proptype == "string" and type(v) == "string" then
b7807583de34 util.datamapper: Add logic for "boolean" tags here the presence means true
Kim Alvefur <zash@zash.se>
parents: 11437
diff changeset
245 out:tag(v, propattr):up();
b7807583de34 util.datamapper: Add logic for "boolean" tags here the presence means true
Kim Alvefur <zash@zash.se>
parents: 11437
diff changeset
246 elseif proptype == "boolean" and v == true then
b7807583de34 util.datamapper: Add logic for "boolean" tags here the presence means true
Kim Alvefur <zash@zash.se>
parents: 11437
diff changeset
247 out:tag(name, propattr):up();
b7807583de34 util.datamapper: Add logic for "boolean" tags here the presence means true
Kim Alvefur <zash@zash.se>
parents: 11437
diff changeset
248 end
11437
87a684df4b65 util.datamapper: Invent extension for using tag name as value
Kim Alvefur <zash@zash.se>
parents: 11436
diff changeset
249 elseif proptype == "string" and type(v) == "string" then
11436
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
parents: 11435
diff changeset
250 out:text_tag(name, v, propattr)
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
parents: 11435
diff changeset
251 elseif proptype == "number" and type(v) == "number" then
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
parents: 11435
diff changeset
252 out:text_tag(name, string.format("%g", v), propattr)
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Kim Alvefur <zash@zash.se>
parents: 11435
diff changeset
253 elseif proptype == "integer" and type(v) == "number" then
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
parents: 11435
diff changeset
254 out:text_tag(name, string.format("%d", v), propattr)
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Kim Alvefur <zash@zash.se>
parents: 11435
diff changeset
255 elseif proptype == "boolean" and type(v) == "boolean" then
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
parents: 11435
diff changeset
256 out:text_tag(name, v and "1" or "0", propattr)
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Kim Alvefur <zash@zash.se>
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diff changeset
257 elseif proptype == "object" and type(propschema) == "table" and type(v) == "table" then
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
parents: 11435
diff changeset
258 local c = unparse(propschema, v, name, namespace);
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
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parents: 11435
diff changeset
259 if c then
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
parents: 11435
diff changeset
260 out:add_direct_child(c);
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
parents: 11435
diff changeset
261 end
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
parents: 11435
diff changeset
262
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
parents: 11435
diff changeset
263 end
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
parents: 11435
diff changeset
264 end
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
parents: 11435
diff changeset
265 end
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
parents: 11435
diff changeset
266 end
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
parents: 11435
diff changeset
267 return out
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
parents: 11435
diff changeset
268
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
parents: 11435
diff changeset
269 end
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
parents: 11435
diff changeset
270 end
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
parents: 11435
diff changeset
271
5df9ffc25bb4 util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
parents: 11435
diff changeset
272 return {parse = parse; unparse = unparse}