prosody
377a9eaf7bef
util/jsonschema.lua

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util/jsonschema.lua @ 11479:377a9eaf7bef

util.datamapper: Fix error on attempt to coerce nil to something Turns falsy values into nil instead of nothing, which ensures this function always has 1 return value, or table.insert({}) complains. Would still happen on some unexpected input, but that's actually a good thing.
author Kim Alvefur <zash@zash.se>
date Tue, 23 Mar 2021 23:55:33 +0100
parent 11460:a8b4e04bc044
child 12132:4ff0d33dfb2b
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 local json = require("util.json")
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2 local null = json.null;
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3
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4 local json_type_name = json.json_type_name
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5
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6 local schema_t = {}
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7
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8 local json_schema_object = {xml_t = {}}
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9
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10 local type_validators = {}
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11
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12 local function simple_validate(schema, data)
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13 if schema == "object" and type(data) == "table" then
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14 return type(data) == "table" and (next(data) == nil or type((next(data, nil))) == "string")
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15 elseif schema == "array" and type(data) == "table" then
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16 return type(data) == "table" and (next(data) == nil or type((next(data, nil))) == "number")
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17 elseif schema == "integer" then
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18 return math.type(data) == schema
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19 elseif schema == "null" then
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20 return data == null
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21 else
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22 return type(data) == schema
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23 end
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24 end
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25
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26 type_validators.string = function(schema, data)
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27
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28 if type(data) == "string" then
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29 if schema.maxLength and #data > schema.maxLength then
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30 return false
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31 end
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32 if schema.minLength and #data < schema.minLength then
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33 return false
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34 end
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35 return true
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36 end
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37 return false
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38 end
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39
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40 type_validators.number = function(schema, data)
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41 if schema.multipleOf and data % schema.multipleOf ~= 0 then
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42 return false
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43 end
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44
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45 if schema.maximum and not (data <= schema.maximum) then
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46 return false
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47 end
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48
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49 if schema.exclusiveMaximum and not (data < schema.exclusiveMaximum) then
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50 return false
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51 end
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52
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53 if schema.minimum and not (data >= schema.minimum) then
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54 return false
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55 end
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56
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57 if schema.exclusiveMinimum and not (data > schema.exclusiveMinimum) then
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58 return false
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59 end
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60
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61 return true
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62 end
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63
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64 type_validators.integer = type_validators.number
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65
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66 local function validate(schema, data)
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67 if type(schema) == "boolean" then
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68 return schema
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69 end
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70 if type(schema) == "string" then
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71 return simple_validate(schema, data)
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72 end
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73 if type(schema) == "table" then
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74 if schema.allOf then
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75 for _, sub in ipairs(schema.allOf) do
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76 if not validate(sub, data) then
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77 return false
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78 end
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79 end
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80 return true
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81 end
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82
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83 if schema.oneOf then
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84 local valid = 0
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85 for _, sub in ipairs(schema.oneOf) do
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86 if validate(sub, data) then
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87 valid = valid + 1
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88 end
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89 end
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90 return valid == 1
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91 end
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92
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93 if schema.anyOf then
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94 for _, sub in ipairs(schema.anyOf) do
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95 if validate(sub, data) then
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96 return true
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97 end
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98 end
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99 return false
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100 end
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101
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102 if schema["not"] then
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103 if validate(schema["not"], data) then
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104 return false
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105 end
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106 end
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107
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108 if schema["if"] then
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109 if validate(schema["if"], data) then
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110 if schema["then"] then
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111 return validate(schema["then"], data)
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112 end
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113 else
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114 if schema["else"] then
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115 return validate(schema["else"], data)
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116 end
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117 end
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118 end
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119
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120 if schema.const ~= nil and schema.const ~= data then
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121 return false
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122 end
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123
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124 if schema["enum"] ~= nil then
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125 for _, v in ipairs(schema["enum"]) do
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126 if v == data then
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127 return true
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128 end
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129 end
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130 return false
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131 end
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132
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133 if schema.type then
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134 if not simple_validate(schema.type, data) then
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135 return false
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136 end
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137
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138 local validator = type_validators[schema.type]
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139 if validator then
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140 return validator(schema, data)
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141 end
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142 end
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143 return true
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144 end
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
145 end
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
146
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
147 type_validators.table = function(schema, data)
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
148 if type(data) == "table" then
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
149
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
150 if schema.maxItems and #data > schema.maxItems then
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
151 return false
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
152 end
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
153
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
154 if schema.minItems and #data < schema.minItems then
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
155 return false
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
156 end
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
157
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
158 if schema.required then
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
159 for _, k in ipairs(schema.required) do
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
160 if data[k] == nil then
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
161 return false
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
162 end
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
163 end
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
164 end
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
165
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
166 if schema.properties then
11445
c73744fa3bdf util.jsonschema: Restructure handling of "properties" and "additionalProperties"
Kim Alvefur <zash@zash.se>
parents: 11444
diff changeset
167 local additional = schema.additionalProperties or true
c73744fa3bdf util.jsonschema: Restructure handling of "properties" and "additionalProperties"
Kim Alvefur <zash@zash.se>
parents: 11444
diff changeset
168 for k, v in pairs(data) do
11446
58c534bac798 util.jsonschema: Implement "propertyNames"
Kim Alvefur <zash@zash.se>
parents: 11445
diff changeset
169 if schema.propertyNames and not validate(schema.propertyNames, k) then
58c534bac798 util.jsonschema: Implement "propertyNames"
Kim Alvefur <zash@zash.se>
parents: 11445
diff changeset
170 return false
58c534bac798 util.jsonschema: Implement "propertyNames"
Kim Alvefur <zash@zash.se>
parents: 11445
diff changeset
171 end
11445
c73744fa3bdf util.jsonschema: Restructure handling of "properties" and "additionalProperties"
Kim Alvefur <zash@zash.se>
parents: 11444
diff changeset
172 local s = schema.properties[k] or additional
c73744fa3bdf util.jsonschema: Restructure handling of "properties" and "additionalProperties"
Kim Alvefur <zash@zash.se>
parents: 11444
diff changeset
173 if not validate(s, v) then
c73744fa3bdf util.jsonschema: Restructure handling of "properties" and "additionalProperties"
Kim Alvefur <zash@zash.se>
parents: 11444
diff changeset
174 return false
11434
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
175 end
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
176 end
11445
c73744fa3bdf util.jsonschema: Restructure handling of "properties" and "additionalProperties"
Kim Alvefur <zash@zash.se>
parents: 11444
diff changeset
177 elseif schema.additionalProperties then
11434
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
178 for k, v in pairs(data) do
11446
58c534bac798 util.jsonschema: Implement "propertyNames"
Kim Alvefur <zash@zash.se>
parents: 11445
diff changeset
179 if schema.propertyNames and not validate(schema.propertyNames, k) then
58c534bac798 util.jsonschema: Implement "propertyNames"
Kim Alvefur <zash@zash.se>
parents: 11445
diff changeset
180 return false
58c534bac798 util.jsonschema: Implement "propertyNames"
Kim Alvefur <zash@zash.se>
parents: 11445
diff changeset
181 end
11445
c73744fa3bdf util.jsonschema: Restructure handling of "properties" and "additionalProperties"
Kim Alvefur <zash@zash.se>
parents: 11444
diff changeset
182 if not validate(schema.additionalProperties, v) then
c73744fa3bdf util.jsonschema: Restructure handling of "properties" and "additionalProperties"
Kim Alvefur <zash@zash.se>
parents: 11444
diff changeset
183 return false
11434
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
184 end
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
185 end
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
186 end
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
187
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
188 if schema.uniqueItems then
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
189
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
190 local values = {}
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
191 for _, v in pairs(data) do
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
192 if values[v] then
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
193 return false
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
194 end
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
195 values[v] = true
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
196 end
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
197 end
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
198
11443
a526abef61e6 util.jsonschema: Implement the "prefixItems" keyword
Kim Alvefur <zash@zash.se>
parents: 11442
diff changeset
199 local p = 0
a526abef61e6 util.jsonschema: Implement the "prefixItems" keyword
Kim Alvefur <zash@zash.se>
parents: 11442
diff changeset
200 if schema.prefixItems then
a526abef61e6 util.jsonschema: Implement the "prefixItems" keyword
Kim Alvefur <zash@zash.se>
parents: 11442
diff changeset
201 for i, s in ipairs(schema.prefixItems) do
a526abef61e6 util.jsonschema: Implement the "prefixItems" keyword
Kim Alvefur <zash@zash.se>
parents: 11442
diff changeset
202 if validate(s, data[i]) then
a526abef61e6 util.jsonschema: Implement the "prefixItems" keyword
Kim Alvefur <zash@zash.se>
parents: 11442
diff changeset
203 p = i
a526abef61e6 util.jsonschema: Implement the "prefixItems" keyword
Kim Alvefur <zash@zash.se>
parents: 11442
diff changeset
204 else
a526abef61e6 util.jsonschema: Implement the "prefixItems" keyword
Kim Alvefur <zash@zash.se>
parents: 11442
diff changeset
205 return false
a526abef61e6 util.jsonschema: Implement the "prefixItems" keyword
Kim Alvefur <zash@zash.se>
parents: 11442
diff changeset
206 end
a526abef61e6 util.jsonschema: Implement the "prefixItems" keyword
Kim Alvefur <zash@zash.se>
parents: 11442
diff changeset
207 end
a526abef61e6 util.jsonschema: Implement the "prefixItems" keyword
Kim Alvefur <zash@zash.se>
parents: 11442
diff changeset
208 end
a526abef61e6 util.jsonschema: Implement the "prefixItems" keyword
Kim Alvefur <zash@zash.se>
parents: 11442
diff changeset
209
11440
d5288c99bb5a util.jsonschema: Correct "items" keyword
Kim Alvefur <zash@zash.se>
parents: 11434
diff changeset
210 if schema.items then
11443
a526abef61e6 util.jsonschema: Implement the "prefixItems" keyword
Kim Alvefur <zash@zash.se>
parents: 11442
diff changeset
211 for i = p + 1, #data do
11440
d5288c99bb5a util.jsonschema: Correct "items" keyword
Kim Alvefur <zash@zash.se>
parents: 11434
diff changeset
212 if not validate(schema.items, data[i]) then
d5288c99bb5a util.jsonschema: Correct "items" keyword
Kim Alvefur <zash@zash.se>
parents: 11434
diff changeset
213 return false
11434
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
214 end
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
215 end
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
216 end
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
217
11442
95f0d77175ca util.jsonschema: Implement the "contains" keyword
Kim Alvefur <zash@zash.se>
parents: 11441
diff changeset
218 if schema.contains then
95f0d77175ca util.jsonschema: Implement the "contains" keyword
Kim Alvefur <zash@zash.se>
parents: 11441
diff changeset
219 local found = false
95f0d77175ca util.jsonschema: Implement the "contains" keyword
Kim Alvefur <zash@zash.se>
parents: 11441
diff changeset
220 for i = 1, #data do
95f0d77175ca util.jsonschema: Implement the "contains" keyword
Kim Alvefur <zash@zash.se>
parents: 11441
diff changeset
221 if validate(schema.contains, data[i]) then
95f0d77175ca util.jsonschema: Implement the "contains" keyword
Kim Alvefur <zash@zash.se>
parents: 11441
diff changeset
222 found = true
95f0d77175ca util.jsonschema: Implement the "contains" keyword
Kim Alvefur <zash@zash.se>
parents: 11441
diff changeset
223 break
95f0d77175ca util.jsonschema: Implement the "contains" keyword
Kim Alvefur <zash@zash.se>
parents: 11441
diff changeset
224 end
95f0d77175ca util.jsonschema: Implement the "contains" keyword
Kim Alvefur <zash@zash.se>
parents: 11441
diff changeset
225 end
95f0d77175ca util.jsonschema: Implement the "contains" keyword
Kim Alvefur <zash@zash.se>
parents: 11441
diff changeset
226 if not found then
95f0d77175ca util.jsonschema: Implement the "contains" keyword
Kim Alvefur <zash@zash.se>
parents: 11441
diff changeset
227 return false
95f0d77175ca util.jsonschema: Implement the "contains" keyword
Kim Alvefur <zash@zash.se>
parents: 11441
diff changeset
228 end
95f0d77175ca util.jsonschema: Implement the "contains" keyword
Kim Alvefur <zash@zash.se>
parents: 11441
diff changeset
229 end
95f0d77175ca util.jsonschema: Implement the "contains" keyword
Kim Alvefur <zash@zash.se>
parents: 11441
diff changeset
230
11434
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
231 return true
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
232 end
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
233 return false
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
234 end
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
235
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
236 type_validators.object = function(schema, data)
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
237 if type(data) == "table" then
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
238 for k in pairs(data) do
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
239 if not (type(k) == "string") then
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
240 return false
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
241 end
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
242 end
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
243
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
244 return type_validators.table(schema, data)
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
245 end
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
246 return false
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
247 end
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
248
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
249 type_validators.array = function(schema, data)
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
250 if type(data) == "table" then
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
251
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
252 for i in pairs(data) do
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
253 if not (type(i) == "number") then
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
254 return false
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
255 end
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
256 end
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
257
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
258 return type_validators.table(schema, data)
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
259 end
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
260 return false
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
261 end
66d4067bdfb2 util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
262
11460
a8b4e04bc044 util.jsonschema: Rename types for improved readability
Kim Alvefur <zash@zash.se>
parents: 11448
diff changeset
263 json_schema_object.validate = validate;
a8b4e04bc044 util.jsonschema: Rename types for improved readability
Kim Alvefur <zash@zash.se>
parents: 11448
diff changeset
264
a8b4e04bc044 util.jsonschema: Rename types for improved readability
Kim Alvefur <zash@zash.se>
parents: 11448
diff changeset
265 return json_schema_object