Добавлен основные классы для сервиса авторизаци

internal/repository/user_postgres.go

@@ -0,0 +1,44 @@
+package repository
+
+import (
+	"authorization/internal"
+	"database/sql"
+	"fmt"
+)
+
+type UserPostgres struct {
+	db *sql.DB
+}
+
+func NewUserPostgres(db *sql.DB) *UserPostgres {
+	return &UserPostgres{db: db}
+}
+
+func (r *UserPostgres) CreateUser(user internal.User) (int, error) {
+	var id int
+	query := fmt.Sprintf("INSERT INTO %s(name,username,password_hash,role) values ($1,$2,$3,$4) RETURNING id", usersTable)
+	row := r.db.QueryRow(query, user.Name, user.Username, user.Password, internal.Student)
+	if err := row.Scan(&id); err != nil {
+		return 0, err
+	}
+
+	return id, nil
+}
+
+func (r *UserPostgres) GetUser(username, password string) (internal.User, error) {
+	var user internal.User
+	query := fmt.Sprintf("SELECT * from %s where username = $1 AND password_hash=$2", usersTable)
+	row := r.db.QueryRow(query, username, password)
+	err := row.Scan(&user.Id, &user.Name, &user.Username, &user.Password, &user.UserRole)
+	return user, err
+}
+
+func (r *UserPostgres) UpdateUserRole(username string, userrole internal.UserRole) (string, error) {
+	query := fmt.Sprintf("UPDATE %s SET role = $1 WHERE username = $2 RETURNING role", usersTable)
+	var newRole string
+	err := r.db.QueryRow(query, userrole, username).Scan(&newRole)
+	if err != nil {
+		return "", fmt.Errorf("failed to update user role: %v", err)
+	}
+	return newRole, nil
+}