text: add hyperlink formatter (#263)

text/hyperlink.go

@@ -0,0 +1,14 @@
+package text
+
+import "fmt"
+
+func Hyperlink(url, text string) string {
+	if url == "" {
+		return text
+	}
+	if text == "" {
+		return url
+	}
+	// source https://gist.github.com/egmontkob/eb114294efbcd5adb1944c9f3cb5feda
+	return fmt.Sprintf("\x1b]8;;%s\x1b\\%s\x1b]8;;\x1b\\", url, text)
+}

text/hyperlink_test.go

@@ -0,0 +1,13 @@
+package text
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestHyperlink(t *testing.T) {
+	assert.Equal(t, "Ghost", Hyperlink("", "Ghost"))
+	assert.Equal(t, "https://example.com", Hyperlink("https://example.com", ""))
+	assert.Equal(t, "\x1b]8;;https://example.com\x1b\\Ghost\x1b]8;;\x1b\\", Hyperlink("https://example.com", "Ghost"))
+}