feat: device authorization RFC 8628 (#5646)

* device auth: implement the write events

* add grant type device code

* fix(init): check if default value implements stringer

---------

Co-authored-by: adlerhurst <silvan.reusser@gmail.com>

internal/domain/device_auth_test.go

@@ -0,0 +1,158 @@
+package domain
+
+import (
+	"testing"
+)
+
+func TestDeviceAuthState_Exists(t *testing.T) {
+	tests := []struct {
+		s    DeviceAuthState
+		want bool
+	}{
+		{
+			s:    DeviceAuthStateUndefined,
+			want: false,
+		},
+		{
+			s:    DeviceAuthStateInitiated,
+			want: true,
+		},
+		{
+			s:    DeviceAuthStateApproved,
+			want: true,
+		},
+		{
+			s:    DeviceAuthStateDenied,
+			want: true,
+		},
+		{
+			s:    DeviceAuthStateExpired,
+			want: true,
+		},
+		{
+			s:    DeviceAuthStateRemoved,
+			want: false,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.s.String(), func(t *testing.T) {
+			if got := tt.s.Exists(); got != tt.want {
+				t.Errorf("DeviceAuthState.Exists() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
+func TestDeviceAuthState_Done(t *testing.T) {
+	tests := []struct {
+		s    DeviceAuthState
+		want bool
+	}{
+		{
+			s:    DeviceAuthStateUndefined,
+			want: false,
+		},
+		{
+			s:    DeviceAuthStateInitiated,
+			want: false,
+		},
+		{
+			s:    DeviceAuthStateApproved,
+			want: true,
+		},
+		{
+			s:    DeviceAuthStateDenied,
+			want: false,
+		},
+		{
+			s:    DeviceAuthStateExpired,
+			want: false,
+		},
+		{
+			s:    DeviceAuthStateRemoved,
+			want: false,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.s.String(), func(t *testing.T) {
+			if got := tt.s.Done(); got != tt.want {
+				t.Errorf("DeviceAuthState.Done() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
+func TestDeviceAuthState_Denied(t *testing.T) {
+	tests := []struct {
+		name string
+		s    DeviceAuthState
+		want bool
+	}{
+		{
+			s:    DeviceAuthStateUndefined,
+			want: false,
+		},
+		{
+			s:    DeviceAuthStateInitiated,
+			want: false,
+		},
+		{
+			s:    DeviceAuthStateApproved,
+			want: false,
+		},
+		{
+			s:    DeviceAuthStateDenied,
+			want: true,
+		},
+		{
+			s:    DeviceAuthStateExpired,
+			want: true,
+		},
+		{
+			s:    DeviceAuthStateRemoved,
+			want: true,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := tt.s.Denied(); got != tt.want {
+				t.Errorf("DeviceAuthState.Denied() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
+func TestDeviceAuthCanceled_State(t *testing.T) {
+	tests := []struct {
+		name string
+		c    DeviceAuthCanceled
+		want DeviceAuthState
+	}{
+		{
+			name: "empty",
+			want: DeviceAuthStateUndefined,
+		},
+		{
+			name: "invalid",
+			c:    "foo",
+			want: DeviceAuthStateUndefined,
+		},
+		{
+			name: "denied",
+			c:    DeviceAuthCanceledDenied,
+			want: DeviceAuthStateDenied,
+		},
+		{
+			name: "expired",
+			c:    DeviceAuthCanceledExpired,
+			want: DeviceAuthStateExpired,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := tt.c.State(); got != tt.want {
+				t.Errorf("DeviceAuthCanceled.State() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}