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// Copyright 2026 Mihna123 Software
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
package user
import (
"errors"
"fmt"
"golang.org/x/crypto/bcrypt"
)
type Repository interface {
Create(in *CreateInput) (*User, error)
GetByUsernameOrEmail(username string, email string) (*User, error)
}
type Service struct {
repository Repository
bcryptCost int
}
func New(r Repository) *Service {
return &Service{repository: r, bcryptCost: bcrypt.DefaultCost}
}
func (s *Service) Register(in *RegisterInput) (*User, error) {
if err := in.validate(); err != nil {
return nil, fmt.Errorf("register: %w", err)
}
_, err := s.repository.GetByUsernameOrEmail(in.Username, in.Email)
if err == nil {
return nil, fmt.Errorf("register: %w", ErrUserExists)
}
if !errors.Is(err, ErrUserNotFound) {
return nil, fmt.Errorf("register: %w", err)
}
pwHash, err := bcrypt.GenerateFromPassword([]byte(in.Password), s.bcryptCost)
if err != nil {
return nil, fmt.Errorf("register: %w", err)
}
ci := &CreateInput{
Username: in.Username,
Email: in.Email,
Phone: in.Phone,
PwHash: string(pwHash),
}
user, err := s.repository.Create(ci)
if err != nil {
return nil, fmt.Errorf("register: %w", err)
}
return user, nil
}
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