feat: create a GlobalID type

2 files changed, 75 insertions, 0 deletions

diff --git a/app/domain/global_id.go b/app/domain/global_id.go
new file mode 100644
index 0000000..de0093d
--- /dev/null
+++ b/app/domain/global_id.go
@@ -0,0 +1,31 @@
+package domain
+
+import (
+	"net/url"
+	"strings"
+
+	v1 "github.com/authzed/authzed-go/proto/authzed/api/v1"
+)
+
+type GlobalID string
+
+func (self GlobalID) String() string {
+	return string(self)
+}
+
+func (self GlobalID) ToObjectReference() *v1.ObjectReference {
+	url, err := url.Parse(self.String())
+	if err != nil {
+		return &v1.ObjectReference{}
+	}
+
+	segments := strings.SplitN(url.Path, "/", 3)
+	if len(segments) < 3 {
+		return &v1.ObjectReference{}
+	}
+
+	return &v1.ObjectReference{
+		ObjectType: strings.ToLower(segments[1]),
+		ObjectId:   segments[2],
+	}
+}
diff --git a/app/domain/global_id_test.go b/app/domain/global_id_test.go
new file mode 100644
index 0000000..e678e6c
--- /dev/null
+++ b/app/domain/global_id_test.go
@@ -0,0 +1,44 @@
+package domain
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestGlobalID(t *testing.T) {
+
+	t.Run("ToObjectReference", func(t *testing.T) {
+		tt := []struct {
+			input   string
+			id      string
+			oType   string
+			isValid bool
+		}{
+			{"gid://app/Sparkle/1", "1", "sparkle", true},
+			{"gid://example/sparkle/1", "1", "sparkle", true},
+			{"gid://example/sparkle/696266fc-68df-11f0-bbc2-7ec11f4b308c", "696266fc-68df-11f0-bbc2-7ec11f4b308c", "sparkle", true},
+			{"gid://example/User/tanuki", "tanuki", "user", true},
+			{"", "", "", false},
+			{"gid://example", "", "", false},
+			{"gid://example/Example", "", "", false},
+		}
+
+		for _, example := range tt {
+			t.Run(example.input, func(t *testing.T) {
+				reference := GlobalID(example.input).ToObjectReference()
+
+				require.NotNil(t, reference)
+				assert.Equal(t, example.id, reference.GetObjectId())
+				assert.Equal(t, example.oType, reference.GetObjectType())
+
+				if example.isValid {
+					require.NoError(t, reference.Validate())
+				} else {
+					require.Error(t, reference.Validate())
+				}
+			})
+		}
+	})
+}