From cecfb0d788f1caf12ecad771e9ded5300a537b03 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mike=20Schw=C3=B6rer?= <pubgit@mikescher.com>
Date: Fri, 5 May 2023 14:43:40 +0200
Subject: [PATCH] v0.0.108

---
 gojson/encode.go | 19 +++++++++++++++++--
 gojson/gionic.go | 44 ++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 61 insertions(+), 2 deletions(-)
 create mode 100644 gojson/gionic.go

diff --git a/gojson/encode.go b/gojson/encode.go
index ba013ed..9f521e1 100644
--- a/gojson/encode.go
+++ b/gojson/encode.go
@@ -167,15 +167,30 @@ func Marshal(v any) ([]byte, error) {
 	return buf, nil
 }
 
+type IndentOpt struct {
+	Prefix string
+	Indent string
+}
+
 // MarshalSafeCollections is like Marshal except it will marshal nil maps and
 // slices as '{}' and '[]' respectfully instead of 'null'
-func MarshalSafeCollections(v interface{}, nilSafeSlices bool, nilSafeMaps bool) ([]byte, error) {
+func MarshalSafeCollections(v interface{}, nilSafeSlices bool, nilSafeMaps bool, indent *IndentOpt) ([]byte, error) {
 	e := &encodeState{}
 	err := e.marshal(v, encOpts{escapeHTML: true, nilSafeSlices: nilSafeSlices, nilSafeMaps: nilSafeMaps})
 	if err != nil {
 		return nil, err
 	}
-	return e.Bytes(), nil
+	b := e.Bytes()
+	if indent != nil {
+		var buf bytes.Buffer
+		err = Indent(&buf, b, indent.Prefix, indent.Indent)
+		if err != nil {
+			return nil, err
+		}
+		return buf.Bytes(), nil
+	} else {
+		return e.Bytes(), nil
+	}
 }
 
 // MarshalIndent is like Marshal but applies Indent to format the output.
diff --git a/gojson/gionic.go b/gojson/gionic.go
new file mode 100644
index 0000000..2bd18f9
--- /dev/null
+++ b/gojson/gionic.go
@@ -0,0 +1,44 @@
+package json
+
+import (
+	"net/http"
+)
+
+// Render interface is copied from github.com/gin-gonic/gin@v1.8.1/render/render.go
+type Render interface {
+	// Render writes data with custom ContentType.
+	Render(http.ResponseWriter) error
+	// WriteContentType writes custom ContentType.
+	WriteContentType(w http.ResponseWriter)
+}
+
+type GoJsonRender struct {
+	Data          any
+	NilSafeSlices bool
+	NilSafeMaps   bool
+	Indent        *IndentOpt
+}
+
+func (r GoJsonRender) Render(w http.ResponseWriter) error {
+	header := w.Header()
+	if val := header["Content-Type"]; len(val) == 0 {
+		header["Content-Type"] = []string{"application/json; charset=utf-8"}
+	}
+
+	jsonBytes, err := MarshalSafeCollections(r.Data, r.NilSafeSlices, r.NilSafeMaps, r.Indent)
+	if err != nil {
+		panic(err)
+	}
+	_, err = w.Write(jsonBytes)
+	if err != nil {
+		panic(err)
+	}
+	return nil
+}
+
+func (r GoJsonRender) WriteContentType(w http.ResponseWriter) {
+	header := w.Header()
+	if val := header["Content-Type"]; len(val) == 0 {
+		header["Content-Type"] = []string{"application/json; charset=utf-8"}
+	}
+}