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-rw-r--r--util/jsonschema.lua245
1 files changed, 245 insertions, 0 deletions
diff --git a/util/jsonschema.lua b/util/jsonschema.lua
new file mode 100644
index 00000000..cc182773
--- /dev/null
+++ b/util/jsonschema.lua
@@ -0,0 +1,245 @@
+local schema_t = {xml_t = {}}
+
+local type_e = schema_t.type_e
+
+local type_validators = {}
+
+local function simple_validate(schema, data)
+ if schema == "object" and type(data) == "table" then
+ return type(data) == "table" and (next(data) == nil or type((next(data, nil))) == "string")
+ elseif schema == "array" and type(data) == "table" then
+ return type(data) == "table" and (next(data) == nil or type((next(data, nil))) == "number")
+ elseif schema == "integer" then
+ return math.type(data) == schema
+ else
+ return type(data) == schema
+ end
+end
+
+type_validators.string = function(schema, data)
+
+ if type(data) == "string" then
+ if schema.maxLength and #data > schema.maxLength then
+ return false
+ end
+ if schema.minLength and #data < schema.minLength then
+ return false
+ end
+ return true
+ end
+ return false
+end
+
+type_validators.number = function(schema, data)
+ if schema.multipleOf and data % schema.multipleOf ~= 0 then
+ return false
+ end
+
+ if schema.maximum and not (data <= schema.maximum) then
+ return false
+ end
+
+ if schema.exclusiveMaximum and not (data < schema.exclusiveMaximum) then
+ return false
+ end
+
+ if schema.minimum and not (data >= schema.minimum) then
+ return false
+ end
+
+ if schema.exclusiveMinimum and not (data > schema.exclusiveMinimum) then
+ return false
+ end
+
+ return true
+end
+
+type_validators.integer = type_validators.number
+
+local function validate(schema, data)
+ if type(schema) == "string" then
+ return simple_validate(schema, data)
+ end
+ if type(schema) == "table" then
+ if schema.allOf then
+ for _, sub in ipairs(schema.allOf) do
+ if not validate(sub, data) then
+ return false
+ end
+ end
+ return true
+ end
+
+ if schema.oneOf then
+ local valid = 0
+ for _, sub in ipairs(schema.oneOf) do
+ if validate(sub, data) then
+ valid = valid + 1
+ end
+ end
+ return valid == 1
+ end
+
+ if schema.anyOf then
+ for _, sub in ipairs(schema.anyOf) do
+ if validate(sub, data) then
+ return true
+ end
+ end
+ return false
+ end
+
+ if schema["not"] then
+ if validate(schema["not"], data) then
+ return false
+ end
+ end
+
+ if schema["if"] then
+ if validate(schema["if"], data) then
+ if schema["then"] then
+ return validate(schema["then"], data)
+ end
+ else
+ if schema["else"] then
+ return validate(schema["else"], data)
+ end
+ end
+ end
+
+ if not simple_validate(schema.type, data) then
+ return false
+ end
+
+ if schema.const ~= nil and schema.const ~= data then
+ return false
+ end
+
+ if schema.enum ~= nil then
+ for _, v in ipairs(schema.enum) do
+ if v == data then
+ return true
+ end
+ end
+ return false
+ end
+
+ local validator = type_validators[schema.type]
+ if not validator then
+ return true
+ end
+
+ return validator(schema, data)
+ end
+end
+
+type_validators.table = function(schema, data)
+ if type(data) == "table" then
+
+ if schema.maxItems and #data > schema.maxItems then
+ return false
+ end
+
+ if schema.minItems and #data < schema.minItems then
+ return false
+ end
+
+ if schema.required then
+ for _, k in ipairs(schema.required) do
+ if data[k] == nil then
+ return false
+ end
+ end
+ end
+
+ if schema.properties then
+ for k, s in pairs(schema.properties) do
+ if data[k] ~= nil then
+ if not validate(s, data[k]) then
+ return false
+ end
+ end
+ end
+ end
+
+ if schema.additionalProperties then
+ for k, v in pairs(data) do
+ if type(k) == "string" then
+ if not (schema.properties and schema.properties[k]) then
+ if not validate(schema.additionalProperties, v) then
+ return false
+ end
+ end
+ end
+ end
+ elseif schema.properties then
+ for k in pairs(data) do
+ if type(k) == "string" then
+ if schema.properties[k] == nil then
+ return false
+ end
+ end
+ end
+ end
+
+ if schema.uniqueItems then
+
+ local values = {}
+ for _, v in pairs(data) do
+ if values[v] then
+ return false
+ end
+ values[v] = true
+ end
+ return true
+ end
+
+ local item_schemas = schema.items
+ if item_schemas and item_schemas[1] == nil then
+ local item_schema = item_schemas
+ for i, v in pairs(data) do
+ if type(i) == "number" then
+ if not validate(item_schema, v) then
+ return false
+ end
+ end
+ end
+ elseif item_schemas and item_schemas[1] ~= nil then
+ for i, s in ipairs(item_schemas) do
+ validate(s, data[i])
+ end
+ end
+
+ return true
+ end
+ return false
+end
+
+type_validators.object = function(schema, data)
+ if type(data) == "table" then
+ for k in pairs(data) do
+ if not (type(k) == "string") then
+ return false
+ end
+ end
+
+ return type_validators.table(schema, data)
+ end
+ return false
+end
+
+type_validators.array = function(schema, data)
+ if type(data) == "table" then
+
+ for i in pairs(data) do
+ if not (type(i) == "number") then
+ return false
+ end
+ end
+
+ return type_validators.table(schema, data)
+ end
+ return false
+end
+
+return {validate = validate; schema_t = schema_t}