Initial

backend/internal/invite/model.go

@@ -0,0 +1,17 @@
+package invite
+
+import (
+	"time"
+)
+
+type Invite struct {
+	Token     string
+	Quota     int
+	Uses      int
+	ExpiresAt time.Time
+	CreatedAt time.Time
+}
+
+func (i *Invite) IsValid() bool {
+	return time.Now().UTC().Before(i.ExpiresAt) || i.Uses < i.Quota
+}