init

backend/internal/auth/repository.go

@@ -0,0 +1,68 @@
+package auth
+
+import (
+	"context"
+	"database/sql"
+	"errors"
+	"fmt"
+	"strings"
+
+	"github.com/google/uuid"
+)
+
+type Repository struct {
+	db *sql.DB
+}
+
+func NewRepository(db *sql.DB) *Repository {
+	return &Repository{db: db}
+}
+
+var ErrEmailTaken = errors.New("email already registered")
+
+func (r *Repository) CreateUser(ctx context.Context, email, passwordHash, name string) (User, error) {
+	user := User{ID: uuid.New(), Email: strings.ToLower(strings.TrimSpace(email)), Name: strings.TrimSpace(name)}
+	_, err := r.db.ExecContext(ctx, `
+		INSERT INTO users (id, email, password_hash, name)
+		VALUES ($1, $2, $3, $4)
+	`, user.ID, user.Email, passwordHash, user.Name)
+	if err != nil {
+		if strings.Contains(strings.ToLower(err.Error()), "unique") {
+			return User{}, ErrEmailTaken
+		}
+		return User{}, fmt.Errorf("create user: %w", err)
+	}
+	return user, nil
+}
+
+func (r *Repository) FindByEmail(ctx context.Context, email string) (storedUser, error) {
+	var user storedUser
+	err := r.db.QueryRowContext(ctx, `
+		SELECT id, email, name, password_hash
+		FROM users
+		WHERE lower(email) = lower($1)
+	`, strings.TrimSpace(email)).Scan(&user.ID, &user.Email, &user.Name, &user.PasswordHash)
+	if errors.Is(err, sql.ErrNoRows) {
+		return storedUser{}, sql.ErrNoRows
+	}
+	if err != nil {
+		return storedUser{}, fmt.Errorf("find user by email: %w", err)
+	}
+	return user, nil
+}
+
+func (r *Repository) FindByID(ctx context.Context, id uuid.UUID) (User, error) {
+	var user User
+	err := r.db.QueryRowContext(ctx, `
+		SELECT id, email, name
+		FROM users
+		WHERE id = $1
+	`, id).Scan(&user.ID, &user.Email, &user.Name)
+	if errors.Is(err, sql.ErrNoRows) {
+		return User{}, sql.ErrNoRows
+	}
+	if err != nil {
+		return User{}, fmt.Errorf("find user by id: %w", err)
+	}
+	return user, nil
+}