format util

Author: Sayan-

pkg/util/format.go

@@ -0,0 +1,31 @@
+package util
+
+import "strings"
+
+// OrDash returns the string if non-empty, otherwise returns "-".
+func OrDash(s string) string {
+	if s == "" {
+		return "-"
+	}
+	return s
+}
+
+// FirstOrDash returns the first non-empty string from the provided items.
+// If all items are empty, it returns "-".
+func FirstOrDash(items ...string) string {
+	for _, item := range items {
+		if item != "" {
+			return item
+		}
+	}
+	return "-"
+}
+
+// JoinOrDash joins the provided strings with ", " as separator.
+// If no items are provided, it returns "-".
+func JoinOrDash(items ...string) string {
+	if len(items) == 0 {
+		return "-"
+	}
+	return strings.Join(items, ", ")
+}

pkg/util/format_test.go

@@ -0,0 +1,26 @@
+package util
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestOrDash(t *testing.T) {
+	assert.Equal(t, "hello", OrDash("hello"))
+	assert.Equal(t, "-", OrDash(""))
+}
+
+func TestFirstOrDash(t *testing.T) {
+	assert.Equal(t, "first", FirstOrDash("first", "second", "third"))
+	assert.Equal(t, "second", FirstOrDash("", "second", "third"))
+	assert.Equal(t, "third", FirstOrDash("", "", "third"))
+	assert.Equal(t, "-", FirstOrDash("", "", ""))
+	assert.Equal(t, "-", FirstOrDash())
+}
+
+func TestJoinOrDash(t *testing.T) {
+	assert.Equal(t, "a, b, c", JoinOrDash("a", "b", "c"))
+	assert.Equal(t, "a", JoinOrDash("a"))
+	assert.Equal(t, "-", JoinOrDash())
+}