98 lines
3.0 KiB
Go
98 lines
3.0 KiB
Go
package repository
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import (
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"context"
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"sno/internal/models"
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"github.com/jackc/pgx/v5/pgxpool"
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)
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// QuizAttemptRepository defines the interface for quiz attempt data operations.
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type QuizAttemptRepository interface {
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Create(ctx context.Context, attempt *models.QuizAttempt) (*models.QuizAttempt, error)
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GetLatestByUserIDAndQuizID(ctx context.Context, userID int64, quizID int) (*models.QuizAttempt, error)
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GetByUserID(ctx context.Context, userID int64) ([]models.QuizAttempt, error)
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}
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// postgresQuizAttemptRepository implements the QuizAttemptRepository interface.
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type postgresQuizAttemptRepository struct {
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db *pgxpool.Pool
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}
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// NewQuizAttemptRepository creates a new instance of a quiz attempt repository.
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func NewQuizAttemptRepository(db *pgxpool.Pool) QuizAttemptRepository {
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return &postgresQuizAttemptRepository{db: db}
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}
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// Create inserts a new quiz attempt record into the database.
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func (r *postgresQuizAttemptRepository) Create(ctx context.Context, attempt *models.QuizAttempt) (*models.QuizAttempt, error) {
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query := `
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INSERT INTO quiz_attempts (user_id, quiz_id, score, stars_earned, answers)
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VALUES ($1, $2, $3, $4, $5)
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RETURNING id, completed_at
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`
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querier := getQuerier(ctx, r.db)
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err := querier.QueryRow(ctx, query,
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attempt.UserID, attempt.QuizID, attempt.Score, attempt.StarsEarned, attempt.Answers,
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).Scan(&attempt.ID, &attempt.CompletedAt)
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if err != nil {
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return nil, err
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}
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return attempt, nil
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}
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// GetLatestByUserIDAndQuizID retrieves the most recent quiz attempt for a given user and quiz.
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func (r *postgresQuizAttemptRepository) GetLatestByUserIDAndQuizID(ctx context.Context, userID int64, quizID int) (*models.QuizAttempt, error) {
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query := `
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SELECT id, user_id, quiz_id, score, stars_earned, completed_at, answers
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FROM quiz_attempts
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WHERE user_id = $1 AND quiz_id = $2
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ORDER BY completed_at DESC
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LIMIT 1
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`
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var attempt models.QuizAttempt
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err := r.db.QueryRow(ctx, query, userID, quizID).Scan(
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&attempt.ID, &attempt.UserID, &attempt.QuizID, &attempt.Score, &attempt.StarsEarned, &attempt.CompletedAt, &attempt.Answers,
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)
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if err != nil {
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return nil, err // pgx.ErrNoRows is a common error here, handled by the service
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}
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return &attempt, nil
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}
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// GetByUserID retrieves all quiz attempts for a given user.
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func (r *postgresQuizAttemptRepository) GetByUserID(ctx context.Context, userID int64) ([]models.QuizAttempt, error) {
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query := `
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SELECT id, user_id, quiz_id, score, stars_earned, completed_at, answers
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FROM quiz_attempts
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WHERE user_id = $1
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ORDER BY completed_at DESC
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`
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rows, err := r.db.Query(ctx, query, userID)
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if err != nil {
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return nil, err
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}
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defer rows.Close()
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var attempts []models.QuizAttempt
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for rows.Next() {
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var a models.QuizAttempt
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if err := rows.Scan(&a.ID, &a.UserID, &a.QuizID, &a.Score, &a.StarsEarned, &a.CompletedAt, &a.Answers); err != nil {
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return nil, err
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}
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attempts = append(attempts, a)
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}
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if err := rows.Err(); err != nil {
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return nil, err
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}
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if attempts == nil {
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return []models.QuizAttempt{}, nil
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}
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return attempts, nil
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}
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