✨ Pretty print JSON

formatters/json.go

@@ -1,30 +1,44 @@
 package formatters
 
 import (
+	"bytes"
 	"encoding/json"
 	"time"
 
 	"codeberg.org/danjones000/my-log/config"
 	"codeberg.org/danjones000/my-log/models"
-	//"codeberg.org/danjones000/my-log/tools"
 )
 
 func newJson(ff config.Formatters) (Formatter, error) {
-	// @todo pretty print
-	return &Json{ff.Json()}, nil
+	return &Json{ff.Json().PrettyPrint}, nil
 }
 
 type Json struct {
-	jf config.JsonFormat
+	prettPrint bool
 }
 
 func (js *Json) Name() string {
 	return "json"
 }
 
+func (js *Json) marshal(v any) (o []byte, err error) {
+	o, err = json.Marshal(v)
+	if err != nil {
+		return
+	}
+	if js.prettPrint {
+		buff := &bytes.Buffer{}
+		err = json.Indent(buff, o, "", "\t")
+		if err == nil {
+			o = buff.Bytes()
+		}
+	}
+	return
+}
+
 func (js *Json) Meta(m models.Meta) ([]byte, error) {
 	o := map[string]any{m.Key: m.Value}
-	return json.Marshal(o)
+	return js.marshal(o)
 }
 
 func (js *Json) entryMap(e models.Entry) map[string]any {
@@ -39,7 +53,7 @@ func (js *Json) entryMap(e models.Entry) map[string]any {
 }
 
 func (js *Json) Entry(e models.Entry) ([]byte, error) {
-	return json.Marshal(js.entryMap(e))
+	return js.marshal(js.entryMap(e))
 }
 
 func (js *Json) Log(l models.Log) ([]byte, error) {
@@ -59,5 +73,5 @@ func (js *Json) Logs(logs []models.Log) (out []byte, err error) {
 		}
 		o[l.Name] = es
 	}
-	return json.Marshal(o)
+	return js.marshal(o)
 }

formatters/json_test.go

@@ -1,16 +1,12 @@
 package formatters
 
 import (
-	//"bufio"
-	//"bytes"
 	"fmt"
 	"testing"
 	"time"
 
 	"codeberg.org/danjones000/my-log/models"
-	//"codeberg.org/danjones000/my-log/tools"
 	"github.com/stretchr/testify/assert"
-	//"github.com/stretchr/testify/require"
 )
 
 func TestJsonName(t *testing.T) {
@@ -65,3 +61,21 @@ func TestJsonNoLogs(t *testing.T) {
 	assert.NoError(t, err)
 	assert.Equal(t, exp, o)
 }
+
+func TestJsonErr(t *testing.T) {
+	f, _ := New("json")
+	o, err := f.Meta(models.Meta{"foo", make(chan bool)})
+	var exp []byte
+	assert.Error(t, err)
+	assert.Equal(t, exp, o)
+}
+
+func TestJsonPretty(t *testing.T) {
+	f := Json{true}
+	o, err := f.Meta(models.Meta{"foo", 42})
+	exp := `{
+	"foo": 42
+}`
+	assert.NoError(t, err)
+	assert.Equal(t, exp, string(o))
+}