encoding/openapi: convert CUE to openapi schemas
Change-Id: Iea3369d702f7cb91e49e61153518c04d6845f03c
Reviewed-on: https://cue-review.googlesource.com/c/cue/+/2120
Reviewed-by: Marcel van Lohuizen <mpvl@google.com>
diff --git a/encoding/openapi/orderedmap.go b/encoding/openapi/orderedmap.go
new file mode 100644
index 0000000..74e789f
--- /dev/null
+++ b/encoding/openapi/orderedmap.go
@@ -0,0 +1,71 @@
+// Copyright 2019 CUE Authors
+//
+// 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 openapi
+
+import "encoding/json"
+
+type orderedMap []kvPair
+
+type kvPair struct {
+ key string
+ value interface{}
+}
+
+func (m *orderedMap) Prepend(key string, value interface{}) {
+ *m = append([]kvPair{{key, value}}, (*m)...)
+}
+
+func (m *orderedMap) Set(key string, value interface{}) {
+ for i, v := range *m {
+ if v.key == key {
+ (*m)[i].value = value
+ return
+ }
+ }
+ *m = append(*m, kvPair{key, value})
+}
+
+func (m *orderedMap) Exists(key string) bool {
+ for _, v := range *m {
+ if v.key == key {
+ return true
+ }
+ }
+ return false
+}
+
+func (m *orderedMap) MarshalJSON() (b []byte, err error) {
+ b = append(b, '{')
+ for i, v := range *m {
+ if i > 0 {
+ b = append(b, ",\n"...)
+ }
+ key, err := json.Marshal(v.key)
+ if je, ok := err.(*json.MarshalerError); ok {
+ return nil, je.Err
+ }
+ b = append(b, key...)
+ b = append(b, ": "...)
+
+ value, err := json.Marshal(v.value)
+ if je, ok := err.(*json.MarshalerError); ok {
+ // return nil, je.Err
+ value, _ = json.Marshal(je.Err.Error())
+ }
+ b = append(b, value...)
+ }
+ b = append(b, '}')
+ return b, nil
+}
