setup user/auth repository and service

internal/repository/user.go

@@ -0,0 +1,98 @@
+package repository
+
+import (
+	"database/sql"
+	"errors"
+	"strings"
+
+	"git.juancwu.dev/juancwu/budgething/internal/model"
+	"github.com/jmoiron/sqlx"
+)
+
+var (
+	ErrUserNotFound   = errors.New("user not found")
+	ErrDuplicateEmail = errors.New("email already exists")
+)
+
+type UserRepository interface {
+	Create(user *model.User) error
+	ByID(id string) (*model.User, error)
+	ByEmail(email string) (*model.User, error)
+	Update(user *model.User) error
+	Delete(id string) error
+}
+
+type userRepository struct {
+	db *sqlx.DB
+}
+
+func NewUserRepository(db *sqlx.DB) UserRepository {
+	return &userRepository{db: db}
+}
+
+func (r *userRepository) Create(user *model.User) error {
+	query := `INSERT INTO users (id, email, password_hash, email_verified_at, created_at) VALUES ($1, $2, $3, $4, $5);`
+
+	_, err := r.db.Exec(query, user.ID, user.Email, user.PasswordHash, user.EmailVerifiedAt, user.CreatedAt)
+	if err != nil {
+		errStr := err.Error()
+		if strings.Contains(errStr, "UNIQUE constraint failed") || strings.Contains(errStr, "duplicate key value") {
+			return ErrDuplicateEmail
+		}
+		return err
+	}
+
+	return nil
+}
+
+func (r *userRepository) ByID(id string) (*model.User, error) {
+	user := &model.User{}
+	query := `SELECT * FROM users WHERE id = $1;`
+
+	err := r.db.Get(user, query, id)
+	if err == sql.ErrNoRows {
+		return nil, ErrUserNotFound
+	}
+
+	return user, err
+}
+
+func (r *userRepository) ByEmail(email string) (*model.User, error) {
+	user := &model.User{}
+	query := `SELECT * FROM users WHERE email = $1;`
+
+	err := r.db.Get(user, query, email)
+	if err == sql.ErrNoRows {
+		return nil, ErrUserNotFound
+	}
+
+	return user, err
+}
+
+func (r *userRepository) Update(user *model.User) error {
+	query := `UPDATE users SET email = $1, password_hash = $2, pending_email = $3, email_verified_at = $4 WHERE id = $5;`
+
+	_, err := r.db.Exec(query, user.Email, user.PasswordHash, user.PendingEmail, user.EmailVerifiedAt, user.ID)
+
+	return err
+}
+
+func (r *userRepository) Delete(id string) error {
+	query := `DELETE FROM users WHERE id = $1;`
+
+	result, err := r.db.Exec(query, id)
+	if err != nil {
+		return err
+	}
+
+	rows, err := result.RowsAffected()
+	if err != nil {
+		return err
+	}
+
+	if rows == 0 {
+		return ErrUserNotFound
+	}
+
+	return nil
+}