Add a helper pkg. (#87)

There are some helper functions in various baton connectors. We should probably put the common ones in baton-sdk. At least that way they'll have the same bugs. :)

pkg/helpers/helpers.go

@@ -0,0 +1,18 @@
+package helpers
+
+import "strings"
+
+func SplitFullName(name string) (string, string) {
+	names := strings.SplitN(name, " ", 2)
+	var firstName, lastName string
+
+	switch len(names) {
+	case 1:
+		firstName = names[0]
+	case 2:
+		firstName = names[0]
+		lastName = names[1]
+	}
+
+	return firstName, lastName
+}

pkg/helpers/helpers_test.go

@@ -0,0 +1,21 @@
+package helpers
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestHelpers_SplitFullName(t *testing.T) {
+	firstName, lastName := SplitFullName("Prince")
+	require.Equal(t, "Prince", firstName)
+	require.Equal(t, "", lastName)
+
+	firstName, lastName = SplitFullName("John Smith")
+	require.Equal(t, "John", firstName)
+	require.Equal(t, "Smith", lastName)
+
+	firstName, lastName = SplitFullName("John Jacob Jingleheimer Schmidt")
+	require.Equal(t, "John", firstName)
+	require.Equal(t, "Jacob Jingleheimer Schmidt", lastName)
+}