add login route

internal/repos/users_repo/repo.go

@@ -3,7 +3,9 @@ package users_repo
 import (
 	"context"
 	"errors"
+	"evening_detective_server/internal/repos"
 
+	"github.com/jackc/pgx/v5"
 	"github.com/jackc/pgx/v5/pgxpool"
 )
 
@@ -75,3 +77,33 @@ func (s *UsersRepo) UpdateUserPassword(
 
 	return nil
 }
+
+func (s *UsersRepo) GetUserByEmail(
+	ctx context.Context,
+	email string,
+) (*repos.User, error) {
+	user := &repos.User{}
+	row := s.pool.QueryRow(
+		ctx,
+		`SELECT id, username, email, password_hash, role, is_active
+		FROM users
+		WHERE email = $1`,
+		email,
+	)
+	err := row.Scan(
+		&user.ID,
+		&user.Username,
+		&user.Email,
+		&user.PasswordHash,
+		&user.Role,
+		&user.IsActive,
+	)
+	if err != nil {
+		if errors.Is(err, pgx.ErrNoRows) {
+			return nil, ErrUserNotFound
+		}
+		return nil, err
+	}
+
+	return user, nil
+}