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jsonschema.go
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jsonschema.go
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package openapi3
import (
"strings"
"github.com/swaggest/jsonschema-go"
)
type toJSONSchemaContext struct {
refsProcessed map[string]jsonschema.SchemaOrBool
refsCount map[string]int
spec *Spec
}
// ToJSONSchema converts OpenAPI Schema to JSON Schema.
//
// Local references are resolved against `#/components/schemas` in spec.
func (s *SchemaOrRef) ToJSONSchema(spec *Spec) jsonschema.SchemaOrBool {
ctx := toJSONSchemaContext{
refsProcessed: map[string]jsonschema.SchemaOrBool{},
refsCount: map[string]int{},
spec: spec,
}
js := s.toJSONSchema(ctx)
// Inline root reference without recursions.
if s.SchemaReference != nil {
dstName := strings.TrimPrefix(s.SchemaReference.Ref, componentsSchemas)
if ctx.refsCount[dstName] == 1 {
js = ctx.refsProcessed[dstName]
delete(ctx.refsProcessed, dstName)
}
}
if len(ctx.refsProcessed) > 0 {
js.TypeObjectEns().WithExtraPropertiesItem(
"components",
map[string]interface{}{"schemas": ctx.refsProcessed},
)
}
return js
}
func (s *SchemaOrRef) toJSONSchema(ctx toJSONSchemaContext) jsonschema.SchemaOrBool {
js := jsonschema.SchemaOrBool{}
jso := js.TypeObjectEns()
if s.SchemaReference != nil {
jso.WithRef(s.SchemaReference.Ref)
if strings.HasPrefix(s.SchemaReference.Ref, componentsSchemas) {
dstName := strings.TrimPrefix(s.SchemaReference.Ref, componentsSchemas)
if _, alreadyProcessed := ctx.refsProcessed[dstName]; !alreadyProcessed {
ctx.refsProcessed[dstName] = jsonschema.SchemaOrBool{}
dst := ctx.spec.Components.Schemas.MapOfSchemaOrRefValues[dstName]
ctx.refsProcessed[dstName] = dst.toJSONSchema(ctx)
}
ctx.refsCount[dstName]++
}
return js
}
if s.Schema == nil {
return js
}
ss := s.Schema
jso.ReflectType = ss.ReflectType
jso.Description = ss.Description
jso.Title = ss.Title
if ss.Type != nil {
jso.AddType(jsonschema.SimpleType(*ss.Type))
}
if ss.Nullable != nil && *ss.Nullable {
jso.AddType(jsonschema.Null)
}
jso.MultipleOf = ss.MultipleOf
if ss.ExclusiveMaximum != nil && *ss.ExclusiveMaximum {
jso.ExclusiveMaximum = ss.Maximum
} else {
jso.Maximum = ss.Maximum
}
if ss.ExclusiveMinimum != nil && *ss.ExclusiveMinimum {
jso.ExclusiveMinimum = ss.Minimum
} else {
jso.Minimum = ss.Minimum
}
jso.MaxLength = ss.MaxLength
if ss.MinLength != nil {
jso.MinLength = *ss.MinLength
}
jso.Pattern = ss.Pattern
jso.MaxItems = ss.MaxItems
if ss.MinItems != nil {
jso.MinItems = *ss.MinItems
}
jso.UniqueItems = ss.UniqueItems
jso.MaxProperties = ss.MaxProperties
if ss.MinProperties != nil {
jso.MinProperties = *ss.MinProperties
}
jso.Required = ss.Required
jso.Enum = ss.Enum
if ss.Not != nil {
jso.WithNot(ss.Not.toJSONSchema(ctx))
}
if len(ss.AllOf) != 0 {
for _, allOf := range ss.AllOf {
jso.AllOf = append(jso.AllOf, allOf.toJSONSchema(ctx))
}
}
if len(ss.OneOf) != 0 {
for _, oneOf := range ss.OneOf {
jso.OneOf = append(jso.OneOf, oneOf.toJSONSchema(ctx))
}
}
if len(ss.AnyOf) != 0 {
for _, anyOf := range ss.AnyOf {
jso.AnyOf = append(jso.AnyOf, anyOf.toJSONSchema(ctx))
}
}
if ss.Items != nil {
jso.ItemsEns().WithSchemaOrBool(ss.Items.toJSONSchema(ctx))
}
if ss.Properties != nil {
for propName, propSchema := range ss.Properties {
jso.WithPropertiesItem(propName, propSchema.toJSONSchema(ctx))
}
}
if ss.AdditionalProperties != nil {
if ss.AdditionalProperties.Bool != nil {
jso.AdditionalProperties = &jsonschema.SchemaOrBool{
TypeBoolean: ss.AdditionalProperties.Bool,
}
} else if ss.AdditionalProperties.SchemaOrRef != nil {
jso.WithAdditionalProperties(ss.AdditionalProperties.SchemaOrRef.toJSONSchema(ctx))
}
}
jso.Format = ss.Format
jso.Default = ss.Default
jso.ReadOnly = ss.ReadOnly
if ss.Example != nil {
jso.WithExamples(*ss.Example)
}
for k, v := range ss.MapOfAnything {
jso.WithExtraPropertiesItem(k, v)
}
return js
}
// FromJSONSchema loads OpenAPI Schema from JSON Schema.
func (s *SchemaOrRef) FromJSONSchema(schema jsonschema.SchemaOrBool) {
if schema.TypeBoolean != nil {
s.fromBool(*schema.TypeBoolean)
return
}
js := schema.TypeObject
if js.Ref != nil {
if deprecated, ok := js.ExtraProperties["deprecated"].(bool); ok && deprecated {
s.Schema = (&Schema{}).WithAllOf(
SchemaOrRef{
Schema: (&Schema{}).WithDeprecated(true),
},
SchemaOrRef{
SchemaReference: &SchemaReference{Ref: *js.Ref},
},
)
return
}
s.SchemaReference = &SchemaReference{Ref: *js.Ref}
return
}
if s.Schema == nil {
s.Schema = &Schema{}
}
s.Schema.ReflectType = js.ReflectType
os := s.Schema
if js.Not != nil {
os.Not = &SchemaOrRef{}
os.Not.FromJSONSchema(*js.Not)
}
fromSchemaArray(&os.OneOf, js.OneOf)
fromSchemaArray(&os.AnyOf, js.AnyOf)
fromSchemaArray(&os.AllOf, js.AllOf)
os.Title = js.Title
os.Description = js.Description
os.Required = js.Required
os.Default = js.Default
os.Enum = js.Enum
if len(js.Examples) > 0 {
os.Example = &js.Examples[0]
}
if deprecated, ok := js.ExtraProperties["deprecated"].(bool); ok {
os.Deprecated = &deprecated
}
if js.Type != nil {
if js.Type.SimpleTypes != nil {
checkNullable(*js.Type.SimpleTypes, os)
} else if len(js.Type.SliceOfSimpleTypeValues) > 0 {
for _, t := range js.Type.SliceOfSimpleTypeValues {
checkNullable(t, os)
}
}
}
if js.AdditionalProperties != nil {
os.AdditionalProperties = &SchemaAdditionalProperties{}
if js.AdditionalProperties.TypeBoolean != nil {
os.AdditionalProperties.Bool = js.AdditionalProperties.TypeBoolean
} else {
ap := SchemaOrRef{}
ap.FromJSONSchema(*js.AdditionalProperties)
os.AdditionalProperties.SchemaOrRef = &ap
}
}
if js.Items != nil && js.Items.SchemaOrBool != nil {
os.Items = &SchemaOrRef{}
os.Items.FromJSONSchema(*js.Items.SchemaOrBool)
}
if js.ExclusiveMaximum != nil {
os.WithExclusiveMaximum(true)
os.Maximum = js.Maximum
} else if js.Maximum != nil {
os.Maximum = js.Maximum
}
if js.ExclusiveMinimum != nil {
os.WithExclusiveMinimum(true)
os.Minimum = js.Minimum
} else if js.Minimum != nil {
os.Minimum = js.Minimum
}
os.Format = js.Format
if js.MinItems != 0 {
os.MinItems = &js.MinItems
}
os.MaxItems = js.MaxItems
if js.MinLength != 0 {
os.MinLength = &js.MinLength
}
os.MaxLength = js.MaxLength
if js.MinProperties != 0 {
os.MinProperties = &js.MinProperties
}
os.MaxProperties = js.MaxProperties
os.MultipleOf = js.MultipleOf
os.Pattern = js.Pattern
if len(js.Properties) > 0 {
os.Properties = make(map[string]SchemaOrRef, len(js.Properties))
for name, jsp := range js.Properties {
osp := SchemaOrRef{}
osp.FromJSONSchema(jsp)
os.Properties[name] = osp
}
}
os.ReadOnly = js.ReadOnly
os.UniqueItems = js.UniqueItems
if writeOnly, ok := js.ExtraProperties["writeOnly"].(bool); ok {
os.WriteOnly = &writeOnly
}
for name, val := range js.ExtraProperties {
if strings.HasPrefix(name, "x-") {
if os.MapOfAnything == nil {
os.MapOfAnything = map[string]interface{}{
name: val,
}
} else {
os.MapOfAnything[name] = val
}
}
}
}
func checkNullable(t jsonschema.SimpleType, os *Schema) {
if t == jsonschema.Null {
os.WithNullable(true)
} else {
os.WithType(SchemaType(t))
}
}
func fromSchemaArray(os *[]SchemaOrRef, js []jsonschema.SchemaOrBool) {
if len(js) == 0 {
return
}
osa := make([]SchemaOrRef, len(js))
for i, jso := range js {
oso := SchemaOrRef{}
oso.FromJSONSchema(jso)
osa[i] = oso
}
*os = osa
}
func (s *SchemaOrRef) fromBool(val bool) {
if s.Schema == nil {
s.Schema = &Schema{}
}
if val {
return
}
s.Schema.Not = &SchemaOrRef{
Schema: &Schema{},
}
}