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schema.go
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schema.go
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package openapi3
import (
"errors"
"fmt"
openapi "github.com/getkin/kin-openapi/openapi3"
"github.com/jexia/semaphore/v2/pkg/specs"
"github.com/jexia/semaphore/v2/pkg/specs/labels"
"github.com/jexia/semaphore/v2/pkg/specs/types"
)
func newSchemas(docs swaggers) (specs.Schemas, error) {
result := make(specs.Schemas)
for file, doc := range docs {
endpoints, err := scanPaths(doc.Paths)
if err != nil {
return nil, fmt.Errorf("failed to scan document paths '%s': %w", file, err)
}
for _, endpoints := range endpoints {
for name, object := range endpoints.objects() {
name := getCanonicalName(doc, name)
// empty schemaRef, skipping
if object == nil || object.ref == nil {
continue
}
tpl, err := newTemplate(object.ref.Value)
if err != nil {
return nil, fmt.Errorf("failed to build property '%s' from file '%s': %w", name, file, err)
}
prop := &specs.Property{
Template: tpl,
Name: name,
Label: labels.Optional,
}
result[prop.Name] = prop
}
}
}
return result, nil
}
// newTemplate builds a Property from the given swagger schemaRef component.
// the function returns a property without name, the name should be set in the top caller.
func newTemplate(schema *openapi.Schema) (tpl specs.Template, err error) {
switch schema.Type {
// handle as Message
case "object":
tpl, err = message(schema)
if err != nil {
return tpl, fmt.Errorf("failed to create object: %w", err)
}
// handle as Repeated
case "array":
tpl, err = repeated(schema)
if err != nil {
return tpl, fmt.Errorf("failed to create array: %w", err)
}
// check for OneOf, AnyOf, AllOf, Not
// and handle according to its type
case "":
switch {
case schema.OneOf != nil:
tpl, err = oneOf(schema)
if err != nil {
return tpl, fmt.Errorf("failed to create oneOf type: %w", err)
}
default:
return tpl, fmt.Errorf("unsupported mixed type")
}
// handle as scalar: string, integer, etc
default:
tpl, err = scalar(schema)
if err != nil {
return tpl, fmt.Errorf("failed to create scalar: %w", err)
}
}
return tpl, nil
}
// builds a message template
func message(s *openapi.Schema) (specs.Template, error) {
message := make(specs.Message, len(s.Properties))
for fieldName, ref := range s.Properties {
if ref.Value == nil {
return specs.Template{}, fmt.Errorf("field '%s' does not have schemaRef", fieldName)
}
tpl, err := newTemplate(ref.Value)
if err != nil {
return specs.Template{}, fmt.Errorf("failed to build field '%s': %w", fieldName, err)
}
message[fieldName] = &specs.Property{
Name: fieldName,
Template: tpl,
}
}
return specs.Template{
Message: message,
}, nil
}
// builds a scalar template
func scalar(s *openapi.Schema) (specs.Template, error) {
var t types.Type
switch s.Type {
case "string":
t = types.String
case "boolean":
t = types.Bool
case "number":
t = types.Float
case "integer":
t = types.Int32
default:
return specs.Template{}, fmt.Errorf("unknown type %s", s.Type)
}
return specs.Template{
Scalar: &specs.Scalar{
Type: t,
Default: s.Default,
},
}, nil
}
// builds a repeated template
func repeated(s *openapi.Schema) (specs.Template, error) {
if s.Items == nil {
return specs.Template{}, errors.New("empty item schemaRef")
}
item, err := newTemplate(s.Items.Value)
if err != nil {
return specs.Template{}, fmt.Errorf("failed to build item schemaRef: %w", err)
}
return specs.Template{
Repeated: []specs.Template{item},
}, nil
}
// builds an oneOf template
func oneOf(s *openapi.Schema) (specs.Template, error) {
oneOf := make(specs.OneOf, len(s.OneOf))
for id, ref := range s.OneOf {
if ref.Value == nil {
return specs.Template{}, fmt.Errorf("type at index %d does not have schemaRef", id)
}
tpl, err := newTemplate(ref.Value)
if err != nil {
return specs.Template{}, fmt.Errorf("failed to build type at index %d: %w", id, err)
}
oneOf[id] = tpl
}
return specs.Template{
OneOf: oneOf,
}, nil
}