author | Matthew Wild <mwild1@gmail.com> |
Sat, 08 Oct 2022 23:55:22 +0100 | |
changeset 12759 | a09dacf660d2 |
parent 12583 | ca6a43fe0231 |
child 12786 | 8815d3090928 |
permissions | -rw-r--r-- |
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-- Copyright (C) 2021 Kim Alvefur |
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-- |
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-- This project is MIT/X11 licensed. Please see the |
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-- COPYING file in the source package for more information. |
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-- |
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-- Based on |
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-- https://json-schema.org/draft/2020-12/json-schema-core.html |
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-- https://json-schema.org/draft/2020-12/json-schema-validation.html |
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-- |
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local json = require"util.json" |
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local null = json.null; |
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local pointer = require "util.jsonpointer" |
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local type json_type_name = json.json_type_name |
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-- json_type_name here is non-standard |
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local type schema_t = boolean | json_schema_object |
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local record json_schema_object |
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type json_type_name = json.json_type_name |
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type schema_object = json_schema_object |
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type : json_type_name | { json_type_name } |
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enum : { any } |
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const : any |
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allOf : { schema_t } |
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anyOf : { schema_t } |
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oneOf : { schema_t } |
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["not"] : schema_t |
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["if"] : schema_t |
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["then"] : schema_t |
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["else"] : schema_t |
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["$ref"] : string |
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-- numbers |
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multipleOf : number |
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maximum : number |
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exclusiveMaximum : number |
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minimum : number |
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exclusiveMinimum : number |
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-- strings |
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maxLength : integer |
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minLength : integer |
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pattern : string -- NYI |
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format : string |
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-- arrays |
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prefixItems : { schema_t } |
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items : schema_t |
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contains : schema_t |
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maxItems : integer |
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minItems : integer |
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uniqueItems : boolean |
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maxContains : integer -- NYI |
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minContains : integer -- NYI |
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-- objects |
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properties : { string : schema_t } |
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maxProperties : integer -- NYI |
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minProperties : integer -- NYI |
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required : { string } |
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dependentRequired : { string : { string } } |
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additionalProperties: schema_t |
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patternProperties: schema_t -- NYI |
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propertyNames : schema_t |
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-- xml |
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record xml_t |
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name : string |
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namespace : string |
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prefix : string |
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attribute : boolean |
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wrapped : boolean |
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-- nonstantard, maybe in the future |
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text : boolean |
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x_name_is_value : boolean |
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x_single_attribute : string |
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end |
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xml : xml_t |
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-- descriptive |
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title : string |
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description : string |
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deprecated : boolean |
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readOnly : boolean |
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writeOnly : boolean |
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-- methods |
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validate : function ( schema_t, any, json_schema_object ) : boolean |
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end |
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-- TODO validator function per schema property |
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local function simple_validate(schema : json_type_name | { json_type_name }, data : any) : boolean |
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if schema == nil then |
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return true |
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elseif schema == "object" and data is table then |
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return type(data) == "table" and (next(data)==nil or type((next(data, nil))) == "string") |
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elseif schema == "array" and data is table then |
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return type(data) == "table" and (next(data)==nil or type((next(data, nil))) == "number") |
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elseif schema == "integer" then |
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return math.type(data) == schema |
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elseif schema == "null" then |
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return data == null |
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elseif schema is { json_type_name } then |
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for _, one in ipairs(schema as { json_type_name }) do |
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if simple_validate(one, data) then |
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return true |
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end |
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end |
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return false |
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else |
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return type(data) == schema |
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end |
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end |
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124 |
|
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local complex_validate : function ( json_schema_object, any, json_schema_object ) : boolean |
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126 |
|
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local function validate (schema : schema_t, data : any, root : json_schema_object) : boolean |
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if schema is boolean then |
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return schema |
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else |
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return complex_validate(schema, data, root) |
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132 |
end |
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133 |
end |
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134 |
|
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function complex_validate (schema : json_schema_object, data : any, root : json_schema_object) : boolean |
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136 |
|
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if root == nil then |
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root = schema |
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139 |
end |
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140 |
|
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141 |
if schema["$ref"] and schema["$ref"]:sub(1,1) == "#" then |
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local referenced = pointer.resolve(root as table, schema["$ref"]:sub(2)) as schema_t |
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if referenced ~= nil and referenced ~= root and referenced ~= schema then |
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if not validate(referenced, data, root) then |
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145 |
return false; |
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146 |
end |
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147 |
end |
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148 |
end |
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149 |
|
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if not simple_validate(schema.type, data) then |
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151 |
return false; |
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152 |
end |
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153 |
|
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154 |
if schema.type == "object" then |
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if data is table then |
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156 |
-- just check that there the keys are all strings |
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157 |
for k in pairs(data) do |
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if not k is string then |
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159 |
return false |
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160 |
end |
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161 |
end |
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162 |
end |
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163 |
end |
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164 |
|
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165 |
if schema.type == "array" then |
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166 |
if data is table then |
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167 |
-- just check that there the keys are all numbers |
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168 |
for i in pairs(data) do |
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169 |
if not i is integer then |
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170 |
return false |
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171 |
end |
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172 |
end |
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173 |
end |
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174 |
end |
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175 |
|
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176 |
if schema["enum"] ~= nil then |
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177 |
local match = false |
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178 |
for _, v in ipairs(schema["enum"]) do |
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179 |
if v == data then |
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180 |
-- FIXME supposed to do deep-compare |
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181 |
match = true |
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182 |
break |
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183 |
end |
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184 |
end |
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185 |
if not match then |
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186 |
return false |
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187 |
end |
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188 |
end |
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189 |
|
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190 |
-- XXX this is measured in byte, while JSON measures in ... bork |
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191 |
-- TODO use utf8.len? |
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192 |
if data is string then |
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193 |
if schema.maxLength and #data > schema.maxLength then |
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194 |
return false |
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195 |
end |
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196 |
if schema.minLength and #data < schema.minLength then |
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197 |
return false |
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|
198 |
end |
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199 |
end |
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200 |
|
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201 |
if data is number then |
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202 |
if schema.multipleOf and (data == 0 or data % schema.multipleOf ~= 0) then |
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203 |
return false |
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204 |
end |
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205 |
|
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206 |
if schema.maximum and not ( data <= schema.maximum ) then |
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207 |
return false |
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208 |
end |
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209 |
|
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210 |
if schema.exclusiveMaximum and not ( data < schema.exclusiveMaximum ) then |
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211 |
return false |
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212 |
end |
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213 |
|
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214 |
if schema.minimum and not ( data >= schema.minimum ) then |
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215 |
return false |
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216 |
end |
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217 |
|
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218 |
if schema.exclusiveMinimum and not ( data > schema.exclusiveMinimum ) then |
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219 |
return false |
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220 |
end |
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221 |
end |
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222 |
|
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223 |
if schema.allOf then |
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224 |
for _, sub in ipairs(schema.allOf) do |
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225 |
if not validate(sub, data, root) then |
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226 |
return false |
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227 |
end |
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228 |
end |
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229 |
end |
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|
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231 |
if schema.oneOf then |
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232 |
local valid = 0 |
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233 |
for _, sub in ipairs(schema.oneOf) do |
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234 |
if validate(sub, data, root) then |
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valid = valid + 1 |
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236 |
end |
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237 |
end |
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238 |
if valid ~= 1 then |
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239 |
return false |
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240 |
end |
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|
241 |
end |
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242 |
|
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243 |
if schema.anyOf then |
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244 |
local match = false |
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245 |
for _, sub in ipairs(schema.anyOf) do |
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246 |
if validate(sub, data, root) then |
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247 |
match = true |
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248 |
break |
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249 |
end |
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250 |
end |
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251 |
if not match then |
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252 |
return false |
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253 |
end |
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254 |
end |
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255 |
|
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256 |
if schema["not"] then |
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257 |
if validate(schema["not"], data, root) then |
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258 |
return false |
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259 |
end |
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260 |
end |
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|
261 |
|
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262 |
if schema["if"] ~= nil then |
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263 |
if validate(schema["if"], data, root) then |
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264 |
if schema["then"] then |
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265 |
return validate(schema["then"], data, root) |
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266 |
end |
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267 |
else |
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|
268 |
if schema["else"] then |
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269 |
return validate(schema["else"], data, root) |
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270 |
end |
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|
271 |
end |
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|
272 |
end |
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|
273 |
|
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|
274 |
if schema.const ~= nil and schema.const ~= data then |
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275 |
return false |
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|
276 |
end |
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|
277 |
|
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|
278 |
if data is table then |
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|
279 |
|
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|
280 |
if schema.maxItems and #data > schema.maxItems then |
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|
281 |
return false |
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changeset
|
282 |
end |
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changeset
|
283 |
|
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|
284 |
if schema.minItems and #data < schema.minItems then |
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|
285 |
return false |
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changeset
|
286 |
end |
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|
287 |
|
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|
288 |
if schema.required then |
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|
289 |
for _, k in ipairs(schema.required) do |
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|
290 |
if data[k] == nil then |
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|
291 |
return false |
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|
292 |
end |
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changeset
|
293 |
end |
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changeset
|
294 |
end |
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|
295 |
|
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|
296 |
if schema.propertyNames ~= nil then |
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|
297 |
for k in pairs(data) do |
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|
298 |
if not validate(schema.propertyNames, k, root) then |
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|
299 |
return false |
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|
300 |
end |
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|
301 |
end |
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|
302 |
end |
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changeset
|
303 |
|
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changeset
|
304 |
if schema.properties then |
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changeset
|
305 |
for k, sub in pairs(schema.properties) do |
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changeset
|
306 |
if data[k] ~= nil and not validate(sub, data[k], root) then |
11450
58c534bac798
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|
307 |
return false |
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|
308 |
end |
12583
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changeset
|
309 |
end |
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changeset
|
310 |
end |
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changeset
|
311 |
|
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changeset
|
312 |
if schema.additionalProperties ~= nil then |
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changeset
|
313 |
for k, v in pairs(data) do |
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changeset
|
314 |
if schema.properties == nil or schema.properties[k as string] == nil then |
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changeset
|
315 |
if not validate(schema.additionalProperties, v, root) then |
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|
316 |
return false |
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changeset
|
317 |
end |
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changeset
|
318 |
end |
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changeset
|
319 |
end |
66d4067bdfb2
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parents:
diff
changeset
|
320 |
end |
66d4067bdfb2
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parents:
diff
changeset
|
321 |
|
66d4067bdfb2
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changeset
|
322 |
if schema.uniqueItems then |
66d4067bdfb2
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changeset
|
323 |
-- only works for scalars, would need to deep-compare for objects/arrays/tables |
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|
324 |
local values : { any : boolean } = {} |
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changeset
|
325 |
for _, v in pairs(data) do |
66d4067bdfb2
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changeset
|
326 |
if values[v] then |
66d4067bdfb2
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changeset
|
327 |
return false |
66d4067bdfb2
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parents:
diff
changeset
|
328 |
end |
66d4067bdfb2
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changeset
|
329 |
values[v] = true |
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changeset
|
330 |
end |
66d4067bdfb2
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Kim Alvefur <zash@zash.se>
parents:
diff
changeset
|
331 |
end |
66d4067bdfb2
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Kim Alvefur <zash@zash.se>
parents:
diff
changeset
|
332 |
|
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a526abef61e6
util.jsonschema: Implement the "prefixItems" keyword
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parents:
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diff
changeset
|
333 |
local p = 0 |
12583
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changeset
|
334 |
if schema.prefixItems ~= nil then |
11447
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changeset
|
335 |
for i, s in ipairs(schema.prefixItems) do |
12583
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changeset
|
336 |
if data[i] == nil then |
ca6a43fe0231
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changeset
|
337 |
break |
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changeset
|
338 |
elseif validate(s, data[i], root) then |
11447
a526abef61e6
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changeset
|
339 |
p = i |
a526abef61e6
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changeset
|
340 |
else |
a526abef61e6
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diff
changeset
|
341 |
return false |
a526abef61e6
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parents:
11446
diff
changeset
|
342 |
end |
a526abef61e6
util.jsonschema: Implement the "prefixItems" keyword
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parents:
11446
diff
changeset
|
343 |
end |
a526abef61e6
util.jsonschema: Implement the "prefixItems" keyword
Kim Alvefur <zash@zash.se>
parents:
11446
diff
changeset
|
344 |
end |
a526abef61e6
util.jsonschema: Implement the "prefixItems" keyword
Kim Alvefur <zash@zash.se>
parents:
11446
diff
changeset
|
345 |
|
12583
ca6a43fe0231
util.jsonschema: Fix validation to not assume presence of "type" field
Kim Alvefur <zash@zash.se>
parents:
12136
diff
changeset
|
346 |
if schema.items ~= nil then |
11447
a526abef61e6
util.jsonschema: Implement the "prefixItems" keyword
Kim Alvefur <zash@zash.se>
parents:
11446
diff
changeset
|
347 |
for i = p+1, #data do |
12136
4ff0d33dfb2b
util.jsonschema: Add support for $ref pointers
Kim Alvefur <zash@zash.se>
parents:
11464
diff
changeset
|
348 |
if not validate(schema.items, data[i], root) then |
11444
d5288c99bb5a
util.jsonschema: Correct "items" keyword
Kim Alvefur <zash@zash.se>
parents:
11443
diff
changeset
|
349 |
return false |
11438
66d4067bdfb2
util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
|
350 |
end |
66d4067bdfb2
util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
|
351 |
end |
66d4067bdfb2
util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
|
352 |
end |
66d4067bdfb2
util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
|
353 |
|
12583
ca6a43fe0231
util.jsonschema: Fix validation to not assume presence of "type" field
Kim Alvefur <zash@zash.se>
parents:
12136
diff
changeset
|
354 |
if schema.contains ~= nil then |
11446
95f0d77175ca
util.jsonschema: Implement the "contains" keyword
Kim Alvefur <zash@zash.se>
parents:
11445
diff
changeset
|
355 |
local found = false |
95f0d77175ca
util.jsonschema: Implement the "contains" keyword
Kim Alvefur <zash@zash.se>
parents:
11445
diff
changeset
|
356 |
for i = 1, #data do |
12136
4ff0d33dfb2b
util.jsonschema: Add support for $ref pointers
Kim Alvefur <zash@zash.se>
parents:
11464
diff
changeset
|
357 |
if validate(schema.contains, data[i], root) then |
11446
95f0d77175ca
util.jsonschema: Implement the "contains" keyword
Kim Alvefur <zash@zash.se>
parents:
11445
diff
changeset
|
358 |
found = true |
95f0d77175ca
util.jsonschema: Implement the "contains" keyword
Kim Alvefur <zash@zash.se>
parents:
11445
diff
changeset
|
359 |
break |
95f0d77175ca
util.jsonschema: Implement the "contains" keyword
Kim Alvefur <zash@zash.se>
parents:
11445
diff
changeset
|
360 |
end |
95f0d77175ca
util.jsonschema: Implement the "contains" keyword
Kim Alvefur <zash@zash.se>
parents:
11445
diff
changeset
|
361 |
end |
95f0d77175ca
util.jsonschema: Implement the "contains" keyword
Kim Alvefur <zash@zash.se>
parents:
11445
diff
changeset
|
362 |
if not found then |
95f0d77175ca
util.jsonschema: Implement the "contains" keyword
Kim Alvefur <zash@zash.se>
parents:
11445
diff
changeset
|
363 |
return false |
95f0d77175ca
util.jsonschema: Implement the "contains" keyword
Kim Alvefur <zash@zash.se>
parents:
11445
diff
changeset
|
364 |
end |
95f0d77175ca
util.jsonschema: Implement the "contains" keyword
Kim Alvefur <zash@zash.se>
parents:
11445
diff
changeset
|
365 |
end |
12583
ca6a43fe0231
util.jsonschema: Fix validation to not assume presence of "type" field
Kim Alvefur <zash@zash.se>
parents:
12136
diff
changeset
|
366 |
end |
11446
95f0d77175ca
util.jsonschema: Implement the "contains" keyword
Kim Alvefur <zash@zash.se>
parents:
11445
diff
changeset
|
367 |
|
12583
ca6a43fe0231
util.jsonschema: Fix validation to not assume presence of "type" field
Kim Alvefur <zash@zash.se>
parents:
12136
diff
changeset
|
368 |
return true; |
11438
66d4067bdfb2
util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
|
369 |
end |
66d4067bdfb2
util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
|
370 |
|
66d4067bdfb2
util.jsonschema: Library for JSON Schema validation
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
|
371 |
|
11464
a8b4e04bc044
util.jsonschema: Rename types for improved readability
Kim Alvefur <zash@zash.se>
parents:
11463
diff
changeset
|
372 |
json_schema_object.validate = validate; |
a8b4e04bc044
util.jsonschema: Rename types for improved readability
Kim Alvefur <zash@zash.se>
parents:
11463
diff
changeset
|
373 |
|
a8b4e04bc044
util.jsonschema: Rename types for improved readability
Kim Alvefur <zash@zash.se>
parents:
11463
diff
changeset
|
374 |
return json_schema_object; |