From 632c7143f114a09b7b4053fbd49b7206092cef9f Mon Sep 17 00:00:00 2001
From: Dan Jones <danjones@goodevilgenius.org>
Date: Mon, 11 Mar 2024 21:18:52 -0500
Subject: [PATCH] =?UTF-8?q?=E2=9C=A8=20Add=20null=20formatter?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 cmd/drop.go             |  5 ++++-
 formatters/new.go       |  1 +
 formatters/new_test.go  |  2 +-
 formatters/null.go      | 32 +++++++++++++++++++++++++++++
 formatters/null_test.go | 45 +++++++++++++++++++++++++++++++++++++++++
 5 files changed, 83 insertions(+), 2 deletions(-)
 create mode 100644 formatters/null.go
 create mode 100644 formatters/null_test.go

diff --git a/cmd/drop.go b/cmd/drop.go
index 45491e9..d74917e 100644
--- a/cmd/drop.go
+++ b/cmd/drop.go
@@ -67,7 +67,10 @@ var dropCmd = &cobra.Command{
 		if err != nil {
 			return err
 		}
-		fmt.Fprintf(cmd.OutOrStdout(), "%s\n", out)
+		if len(out) > 0 && out[len(out)-1] != 10 {
+			out = append(out, 10)
+		}
+		fmt.Fprintf(cmd.OutOrStdout(), "%s", out)
 
 		return nil
 	},
diff --git a/formatters/new.go b/formatters/new.go
index 3cfdb3c..bade49b 100644
--- a/formatters/new.go
+++ b/formatters/new.go
@@ -11,6 +11,7 @@ type formatMaker func(config.Formatters) (Formatter, error)
 var formatterMap = map[string]formatMaker{
 	"plain": newPlain,
 	"json":  newJson,
+	"zero":  newNull,
 }
 
 func Preferred() (f Formatter, err error) {
diff --git a/formatters/new_test.go b/formatters/new_test.go
index c6d5e56..ed56be3 100644
--- a/formatters/new_test.go
+++ b/formatters/new_test.go
@@ -10,7 +10,7 @@ import (
 )
 
 func TestKinds(t *testing.T) {
-	assert.ElementsMatch(t, []string{"plain", "json"}, Kinds())
+	assert.ElementsMatch(t, []string{"plain", "json", "zero"}, Kinds())
 }
 
 func TestNewUnsupported(t *testing.T) {
diff --git a/formatters/null.go b/formatters/null.go
new file mode 100644
index 0000000..4dd1775
--- /dev/null
+++ b/formatters/null.go
@@ -0,0 +1,32 @@
+package formatters
+
+import (
+	"codeberg.org/danjones000/my-log/config"
+	"codeberg.org/danjones000/my-log/models"
+)
+
+func newNull(ff config.Formatters) (Formatter, error) {
+	return &Null{}, nil
+}
+
+type Null struct{}
+
+func (n *Null) Name() string {
+	return "zero"
+}
+
+func (n *Null) Meta(m models.Meta) (o []byte, err error) {
+	return
+}
+
+func (n *Null) Entry(e models.Entry) (o []byte, err error) {
+	return
+}
+
+func (n *Null) Log(l models.Log) (o []byte, err error) {
+	return
+}
+
+func (n *Null) Logs(logs []models.Log) (out []byte, err error) {
+	return
+}
diff --git a/formatters/null_test.go b/formatters/null_test.go
new file mode 100644
index 0000000..f7c26c1
--- /dev/null
+++ b/formatters/null_test.go
@@ -0,0 +1,45 @@
+package formatters
+
+import (
+	"testing"
+	"time"
+
+	"codeberg.org/danjones000/my-log/models"
+	"github.com/stretchr/testify/assert"
+)
+
+var empty []byte
+
+func TestNullName(t *testing.T) {
+	f, err := New("zero")
+	assert.NoError(t, err)
+	assert.Equal(t, "zero", f.Name())
+}
+
+func TestNullMeta(t *testing.T) {
+	f, _ := New("zero")
+	o, err := f.Meta(models.Meta{"foo", 42})
+	assert.NoError(t, err)
+	assert.Equal(t, empty, o)
+}
+
+func TestNullEntry(t *testing.T) {
+	f, _ := New("zero")
+	o, err := f.Entry(models.Entry{"title", time.Now(), models.Metas{}})
+	assert.NoError(t, err)
+	assert.Equal(t, empty, o)
+}
+
+func TestNullLog(t *testing.T) {
+	f, _ := New("zero")
+	o, err := f.Log(models.Log{"jim", []models.Entry{{"title", time.Now(), models.Metas{}}}})
+	assert.NoError(t, err)
+	assert.Equal(t, empty, o)
+}
+
+func TestNullLogs(t *testing.T) {
+	f, _ := New("zero")
+	o, err := f.Logs([]models.Log{{"jim", []models.Entry{{"title", time.Now(), models.Metas{}}}}})
+	assert.NoError(t, err)
+	assert.Equal(t, empty, o)
+}