From 68fe21362b12533694065d4ff03b476433eb9a59 Mon Sep 17 00:00:00 2001
From: Vasiliy Tolstov <v.tolstov@unistack.org>
Date: Wed, 2 Feb 2022 02:08:41 +0300
Subject: [PATCH] add helpers for openapi document

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>
---
 openapiv2/document.go | 42 ++++++++++++++++++++++++++++++++++++++++++
 openapiv3/document.go | 42 ++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 84 insertions(+)
 create mode 100644 openapiv2/document.go
 create mode 100644 openapiv3/document.go

diff --git a/openapiv2/document.go b/openapiv2/document.go
new file mode 100644
index 0000000..6b42f94
--- /dev/null
+++ b/openapiv2/document.go
@@ -0,0 +1,42 @@
+// Copyright 2020 Google LLC. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package openapiv2
+
+import (
+	"gopkg.in/yaml.v3"
+
+	"github.com/google/gnostic/compiler"
+)
+
+// ParseDocument reads an OpenAPI v2 description from a YAML/JSON representation.
+func ParseDocument(b []byte) (*Document, error) {
+	info, err := compiler.ReadInfoFromBytes("", b)
+	if err != nil {
+		return nil, err
+	}
+	root := info.Content[0]
+	return NewDocument(root, compiler.NewContextWithExtensions("$root", root, nil, nil))
+}
+
+// YAMLValue produces a serialized YAML representation of the document.
+func (d *Document) YAMLValue(comment string) ([]byte, error) {
+	rawInfo := d.ToRawInfo()
+	rawInfo = &yaml.Node{
+		Kind:        yaml.DocumentNode,
+		Content:     []*yaml.Node{rawInfo},
+		HeadComment: comment,
+	}
+	return yaml.Marshal(rawInfo)
+}
diff --git a/openapiv3/document.go b/openapiv3/document.go
new file mode 100644
index 0000000..17deb9f
--- /dev/null
+++ b/openapiv3/document.go
@@ -0,0 +1,42 @@
+// Copyright 2020 Google LLC. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package openapiv3
+
+import (
+	"gopkg.in/yaml.v3"
+
+	"github.com/google/gnostic/compiler"
+)
+
+// ParseDocument reads an OpenAPI v3 description from a YAML/JSON representation.
+func ParseDocument(b []byte) (*Document, error) {
+	info, err := compiler.ReadInfoFromBytes("", b)
+	if err != nil {
+		return nil, err
+	}
+	root := info.Content[0]
+	return NewDocument(root, compiler.NewContextWithExtensions("$root", root, nil, nil))
+}
+
+// YAMLValue produces a serialized YAML representation of the document.
+func (d *Document) YAMLValue(comment string) ([]byte, error) {
+	rawInfo := d.ToRawInfo()
+	rawInfo = &yaml.Node{
+		Kind:        yaml.DocumentNode,
+		Content:     []*yaml.Node{rawInfo},
+		HeadComment: comment,
+	}
+	return yaml.Marshal(rawInfo)
+}