Add general context of user data to reflect context (#42)

.golangci.yml

@@ -20,6 +20,7 @@ linters-settings:
 linters:
   enable-all: true
   disable:
+    - containedctx
     - goerr113
     - funlen
     - gocognit

context.go

@@ -1,6 +1,7 @@
 package jsonschema
 
 import (
+	"context"
 	"reflect"
 	"strings"
 
@@ -128,6 +129,9 @@ func ProcessWithoutTags(rc *ReflectContext) {
 
 // ReflectContext accompanies single reflect operation.
 type ReflectContext struct {
+	// Context allows communicating user data between reflection steps.
+	context.Context
+
 	// DefName returns custom definition name for a type, can be nil.
 	DefName func(t reflect.Type, defaultDefName string) string
 

reflect.go

@@ -1,6 +1,7 @@
 package jsonschema
 
 import (
+	"context"
 	"encoding"
 	"encoding/json"
 	"errors"
@@ -185,6 +186,7 @@ func checkSchemaSetup(v reflect.Value, s *Schema) (bool, error) {
 // Titled, Described, Enum, NamedEnum.
 func (r *Reflector) Reflect(i interface{}, options ...func(rc *ReflectContext)) (Schema, error) {
 	rc := ReflectContext{}
+	rc.Context = context.Background()
 	rc.DefinitionsPrefix = "#/definitions/"
 	rc.PropertyNameTag = "json"
 	rc.Path = []string{"#"}

reflect_test.go

@@ -1,6 +1,7 @@
 package jsonschema_test
 
 import (
+	"context"
 	"encoding"
 	"encoding/json"
 	"mime/multipart"
@@ -1070,3 +1071,24 @@ func TestReflector_Reflect_parentTagsFiltered(t *testing.T) {
 	}{})
 	assert.EqualError(t, err, "failed to parse int value abc in tag minProperties: strconv.ParseInt: parsing \"abc\": invalid syntax")
 }
+
+func TestReflector_Reflect_context(t *testing.T) {
+	type ctxKey struct{}
+
+	type Test struct {
+		Foo string `json:"foo"`
+	}
+
+	r := jsonschema.Reflector{}
+
+	_, err := r.Reflect(new(Test),
+		func(rc *jsonschema.ReflectContext) {
+			rc.Context = context.WithValue(rc.Context, ctxKey{}, true)
+		},
+		func(rc *jsonschema.ReflectContext) {
+			assert.Equal(t, true, rc.Value(ctxKey{}))
+		},
+	)
+
+	require.NoError(t, err)
+}