initial commit from original sev version

internal/auth/users.go

@@ -0,0 +1,45 @@
+package auth
+
+import (
+	"errors"
+	"sync"
+
+	"abuse_registration_poc/internal/models"
+)
+
+type UserStore struct {
+	mu    sync.RWMutex
+	users map[string]models.User
+}
+
+func NewStaticUserStore() *UserStore {
+	return &UserStore{users: map[string]models.User{
+		"reader": {ID: 1, UserName: "reader", Password: "reader-password", Role: models.RoleReader},
+		"admin":  {ID: 2, UserName: "admin", Password: "admin-password", Role: models.RoleAdmin},
+	}}
+}
+
+func (s *UserStore) ValidateCredentials(user *models.ValidateUser) error {
+	s.mu.RLock()
+	defer s.mu.RUnlock()
+
+	stored, ok := s.users[user.UserName]
+	if !ok || stored.Password != user.Password {
+		return errors.New("credentials invalid")
+	}
+
+	user.ID = stored.ID
+	user.Role = stored.Role
+	return nil
+}
+
+func (s *UserStore) FindByID(id int64) (models.User, bool) {
+	s.mu.RLock()
+	defer s.mu.RUnlock()
+	for _, user := range s.users {
+		if user.ID == id {
+			return user, true
+		}
+	}
+	return models.User{}, false
+}