feat: add create salty user

pkg/domain/salty-user.go

@@ -0,0 +1,74 @@
+package domain
+
+import (
+	"context"
+	"crypto/sha256"
+	"fmt"
+	"log"
+	"strings"
+
+	"github.com/keys-pub/keys"
+	"github.com/oklog/ulid/v2"
+	"github.com/sour-is/ev/pkg/es/event"
+)
+
+func Init(ctx context.Context) error {
+	return event.Register(ctx, &UserRegistered{})
+}
+
+type SaltyUser struct {
+	Name   string
+	Pubkey *keys.EdX25519PublicKey
+	Inbox  ulid.ULID
+
+	event.AggregateRoot
+}
+
+var _ event.Aggregate = (*SaltyUser)(nil)
+
+// ApplyEvent  applies the event to the aggrigate state
+func (a *SaltyUser) ApplyEvent(lis ...event.Event) {
+	for _, e := range lis {
+		switch e := e.(type) {
+		case *UserRegistered:
+			a.Name = e.Name
+			a.Pubkey = e.Pubkey
+			a.Inbox = e.EventMeta().EventID
+			a.SetStreamID(a.streamID())
+		default:
+			log.Printf("unknown event %T", e)
+		}
+	}
+}
+
+func (a *SaltyUser) streamID() string {
+	return fmt.Sprintf("saltyuser-%x", sha256.Sum256([]byte(strings.ToLower(a.Name))))
+}
+
+func (a *SaltyUser) OnUserRegister(name string, pubkey *keys.EdX25519PublicKey) error {
+	event.Raise(a, &UserRegistered{Name: name, Pubkey: pubkey})
+	return nil
+}
+
+type UserRegistered struct {
+	Name     string
+	Pubkey   *keys.EdX25519PublicKey
+	Endpoint ulid.ULID
+
+	eventMeta event.Meta
+}
+
+var _ event.Event = (*UserRegistered)(nil)
+
+func (e *UserRegistered) EventMeta() event.Meta {
+	if e == nil {
+		return event.Meta{}
+	}
+	return e.eventMeta
+}
+
+func (e *UserRegistered) SetEventMeta(m event.Meta) {
+	if e != nil {
+		e.eventMeta = m
+	}
+}