7 files changed, 190 insertions, 0 deletions
diff --git a/app/domain/entity.go b/app/domain/entity.go
new file mode 100644
index 0000000..fb1cab8
--- /dev/null
+++ b/app/domain/entity.go
@@ -0,0 +1,7 @@
+package domain
+
+type Entity interface {
+	GetID() ID
+	SetID(id ID) error
+	Validate() error
+}
diff --git a/app/domain/id.go b/app/domain/id.go
new file mode 100644
index 0000000..117a9ad
--- /dev/null
+++ b/app/domain/id.go
@@ -0,0 +1,7 @@
+package domain
+
+type ID string
+
+func (id ID) String() string {
+	return string(id)
+}
diff --git a/app/domain/repository.go b/app/domain/repository.go
new file mode 100644
index 0000000..fb7b6da
--- /dev/null
+++ b/app/domain/repository.go
@@ -0,0 +1,7 @@
+package domain
+
+type Repository[T Entity] interface {
+	All() []T
+	Find(ID) T
+	Save(T) error
+}
diff --git a/app/domain/sparkle.go b/app/domain/sparkle.go
new file mode 100644
index 0000000..68aed67
--- /dev/null
+++ b/app/domain/sparkle.go
@@ -0,0 +1,60 @@
+package domain
+
+import (
+	"errors"
+	"regexp"
+
+	"gitlab.com/gitlab-org/software-supply-chain-security/authorization/sparkled/pkg/pls"
+)
+
+type Sparkle struct {
+	ID       ID     `json:"id" jsonapi:"primary,sparkles"`
+	Sparklee string `json:"sparklee" jsonapi:"attr,sparklee"`
+	Author   *User  `json:"author" jsonapi:"attr,author"`
+	Reason   string `json:"reason" jsonapi:"attr,reason"`
+}
+
+var SparkleRegex = regexp.MustCompile(`\A\s*(?P<sparklee>@\w+)\s+(?P<reason>.+)\z`)
+var SparkleeIndex = SparkleRegex.SubexpIndex("sparklee")
+var ReasonIndex = SparkleRegex.SubexpIndex("reason")
+
+var ReasonIsRequired = errors.New("Reason is required")
+var SparkleIsEmpty = errors.New("Sparkle is empty")
+var SparkleIsInvalid = errors.New("Sparkle is invalid")
+var SparkleeIsRequired = errors.New("Sparklee is required")
+
+func NewSparkle(text string) (*Sparkle, error) {
+	if len(text) == 0 {
+		return nil, SparkleIsEmpty
+	}
+
+	matches := SparkleRegex.FindStringSubmatch(text)
+	if len(matches) == 0 {
+		return nil, SparkleIsInvalid
+	}
+
+	return &Sparkle{
+		ID:       ID(pls.GenerateULID()),
+		Sparklee: matches[SparkleeIndex],
+		Reason:   matches[ReasonIndex],
+	}, nil
+}
+
+func (s *Sparkle) GetID() ID {
+	return s.ID
+}
+
+func (s *Sparkle) SetID(id ID) error {
+	s.ID = id
+	return nil
+}
+
+func (s *Sparkle) Validate() error {
+	if s.Sparklee == "" {
+		return SparkleeIsRequired
+	}
+	if s.Reason == "" {
+		return ReasonIsRequired
+	}
+	return nil
+}
diff --git a/app/domain/sparkle_test.go b/app/domain/sparkle_test.go
new file mode 100644
index 0000000..8d81afd
--- /dev/null
+++ b/app/domain/sparkle_test.go
@@ -0,0 +1,51 @@
+package domain
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestSparkle(t *testing.T) {
+	t.Run("NewSparkle", func(t *testing.T) {
+		t.Run("with a valid body", func(t *testing.T) {
+			sparkle, err := NewSparkle("@tanuki for helping me with my homework!")
+
+			assert.Nil(t, err)
+			if err != nil {
+				assert.Equal(t, "@tanuki", sparkle.Sparklee)
+				assert.Equal(t, "for helping me with my homework!", sparkle.Reason)
+			}
+		})
+
+		t.Run("with an empty body", func(t *testing.T) {
+			sparkle, err := NewSparkle("")
+
+			assert.Nil(t, sparkle)
+			assert.NotNil(t, err)
+			if err != nil {
+				assert.Equal(t, "Sparkle is empty", err.Error())
+			}
+		})
+
+		t.Run("without a reason", func(t *testing.T) {
+			sparkle, err := NewSparkle("@tanuki")
+
+			assert.Nil(t, sparkle)
+			assert.NotNil(t, err)
+			if err != nil {
+				assert.Equal(t, "Sparkle is invalid", err.Error())
+			}
+		})
+
+		t.Run("without a username", func(t *testing.T) {
+			sparkle, err := NewSparkle("for helping me with my homework")
+
+			assert.Nil(t, sparkle)
+			assert.NotNil(t, err)
+			if err != nil {
+				assert.Equal(t, "Sparkle is invalid", err.Error())
+			}
+		})
+	})
+}
diff --git a/app/domain/user.go b/app/domain/user.go
new file mode 100644
index 0000000..aae17f6
--- /dev/null
+++ b/app/domain/user.go
@@ -0,0 +1,34 @@
+package domain
+
+type User struct {
+	ID         ID     `json:"id" jsonapi:"primary,users"`
+	Username   string `json:"username" jsonapi:"attr,username"`
+	Email      string `json:"email" jsonapi:"attr,email"`
+	ProfileURL string `json:"profile" jsonapi:"attr,profile"`
+	Picture    string `json:"picture" jsonapi:"attr,picture"`
+}
+
+func NewUser() *User {
+	return &User{}
+}
+
+func (u *User) GetID() ID {
+	return u.ID
+}
+
+func (u *User) SetID(id ID) error {
+	u.ID = id
+	return nil
+}
+
+func (u *User) Validate() error {
+	return nil
+}
+
+func (self *User) Sparkle(sparklee string, reason string) *Sparkle {
+	return &Sparkle{
+		Sparklee: sparklee,
+		Author:   self,
+		Reason:   reason,
+	}
+}
diff --git a/app/domain/user_test.go b/app/domain/user_test.go
new file mode 100644
index 0000000..1576d6d
--- /dev/null
+++ b/app/domain/user_test.go
@@ -0,0 +1,24 @@
+package domain
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestUser(t *testing.T) {
+	t.Run("Sparkle", func(t *testing.T) {
+		t.Run("returns a new Sparkle", func(t *testing.T) {
+			tanuki := &User{Username: "tanuki"}
+			user := &User{}
+
+			sparkle := user.Sparkle(tanuki.Username, "for helping me with my homework")
+
+			require.NotNil(t, sparkle)
+			assert.Equal(t, tanuki.Username, sparkle.Sparklee)
+			assert.Equal(t, "for helping me with my homework", sparkle.Reason)
+			assert.Equal(t, user, sparkle.Author)
+		})
+	})
+}