1 files changed, 91 insertions, 0 deletions
diff --git a/vendor/github.com/go-openapi/spec/properties.go b/vendor/github.com/go-openapi/spec/properties.go
new file mode 100644
index 000000000..91d2435f0
--- /dev/null
+++ b/vendor/github.com/go-openapi/spec/properties.go
@@ -0,0 +1,91 @@
+package spec
+
+import (
+	"bytes"
+	"encoding/json"
+	"reflect"
+	"sort"
+)
+
+// OrderSchemaItem holds a named schema (e.g. from a property of an object)
+type OrderSchemaItem struct {
+	Name string
+	Schema
+}
+
+// OrderSchemaItems is a sortable slice of named schemas.
+// The ordering is defined by the x-order schema extension.
+type OrderSchemaItems []OrderSchemaItem
+
+// MarshalJSON produces a json object with keys defined by the name schemas
+// of the OrderSchemaItems slice, keeping the original order of the slice.
+func (items OrderSchemaItems) MarshalJSON() ([]byte, error) {
+	buf := bytes.NewBuffer(nil)
+	buf.WriteString("{")
+	for i := range items {
+		if i > 0 {
+			buf.WriteString(",")
+		}
+		buf.WriteString("\"")
+		buf.WriteString(items[i].Name)
+		buf.WriteString("\":")
+		bs, err := json.Marshal(&items[i].Schema)
+		if err != nil {
+			return nil, err
+		}
+		buf.Write(bs)
+	}
+	buf.WriteString("}")
+	return buf.Bytes(), nil
+}
+
+func (items OrderSchemaItems) Len() int      { return len(items) }
+func (items OrderSchemaItems) Swap(i, j int) { items[i], items[j] = items[j], items[i] }
+func (items OrderSchemaItems) Less(i, j int) (ret bool) {
+	ii, oki := items[i].Extensions.GetInt("x-order")
+	ij, okj := items[j].Extensions.GetInt("x-order")
+	if oki {
+		if okj {
+			defer func() {
+				if err := recover(); err != nil {
+					defer func() {
+						if err = recover(); err != nil {
+							ret = items[i].Name < items[j].Name
+						}
+					}()
+					ret = reflect.ValueOf(ii).String() < reflect.ValueOf(ij).String()
+				}
+			}()
+			return ii < ij
+		}
+		return true
+	} else if okj {
+		return false
+	}
+	return items[i].Name < items[j].Name
+}
+
+// SchemaProperties is a map representing the properties of a Schema object.
+// It knows how to transform its keys into an ordered slice.
+type SchemaProperties map[string]Schema
+
+// ToOrderedSchemaItems transforms the map of properties into a sortable slice
+func (properties SchemaProperties) ToOrderedSchemaItems() OrderSchemaItems {
+	items := make(OrderSchemaItems, 0, len(properties))
+	for k, v := range properties {
+		items = append(items, OrderSchemaItem{
+			Name:   k,
+			Schema: v,
+		})
+	}
+	sort.Sort(items)
+	return items
+}
+
+// MarshalJSON produces properties as json, keeping their order.
+func (properties SchemaProperties) MarshalJSON() ([]byte, error) {
+	if properties == nil {
+		return []byte("null"), nil
+	}
+	return json.Marshal(properties.ToOrderedSchemaItems())
+}