quite a lot of things

internal/auth/store.go

@@ -0,0 +1,69 @@
+package auth
+
+import (
+	"billit/internal/database"
+)
+
+// DBUserStore adapts database.Service to auth.UserStore interface
+type DBUserStore struct {
+	db database.Service
+}
+
+// NewDBUserStore creates a new user store backed by the database
+func NewDBUserStore(db database.Service) *DBUserStore {
+	return &DBUserStore{db: db}
+}
+
+// CreateUser creates a new user
+func (s *DBUserStore) CreateUser(email, passwordHash string) (*User, error) {
+	dbUser, err := s.db.CreateUser(email, passwordHash)
+	if err != nil {
+		return nil, err
+	}
+	return &User{
+		ID:             dbUser.ID,
+		Email:          dbUser.Email,
+		Password:       dbUser.Password,
+		CompanyDetails: dbUser.CompanyDetails,
+		BankDetails:    dbUser.BankDetails,
+		CreatedAt:      dbUser.CreatedAt,
+	}, nil
+}
+
+// GetUserByEmail retrieves a user by email
+func (s *DBUserStore) GetUserByEmail(email string) (*User, error) {
+	dbUser, err := s.db.GetUserByEmail(email)
+	if err != nil {
+		return nil, err
+	}
+	if dbUser == nil {
+		return nil, nil
+	}
+	return &User{
+		ID:             dbUser.ID,
+		Email:          dbUser.Email,
+		Password:       dbUser.Password,
+		CompanyDetails: dbUser.CompanyDetails,
+		BankDetails:    dbUser.BankDetails,
+		CreatedAt:      dbUser.CreatedAt,
+	}, nil
+}
+
+// GetUserByID retrieves a user by ID
+func (s *DBUserStore) GetUserByID(id string) (*User, error) {
+	dbUser, err := s.db.GetUserByID(id)
+	if err != nil {
+		return nil, err
+	}
+	if dbUser == nil {
+		return nil, nil
+	}
+	return &User{
+		ID:             dbUser.ID,
+		Email:          dbUser.Email,
+		Password:       dbUser.Password,
+		CompanyDetails: dbUser.CompanyDetails,
+		BankDetails:    dbUser.BankDetails,
+		CreatedAt:      dbUser.CreatedAt,
+	}, nil
+}