125 lines
3.3 KiB
Go
125 lines
3.3 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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// QuestionRepository defines the interface for question data operations.
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type QuestionRepository interface {
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Create(ctx context.Context, question *models.Question) (*models.Question, error)
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GetByQuizID(ctx context.Context, quizID int) ([]models.Question, error)
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GetByID(ctx context.Context, id int) (*models.Question, error)
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Update(ctx context.Context, id int, question *models.Question) (*models.Question, error)
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Delete(ctx context.Context, id int) error
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}
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// postgresQuestionRepository implements the QuestionRepository interface.
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type postgresQuestionRepository struct {
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db *pgxpool.Pool
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}
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// NewQuestionRepository creates a new instance of a question repository.
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func NewQuestionRepository(db *pgxpool.Pool) QuestionRepository {
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return &postgresQuestionRepository{db: db}
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}
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// Create inserts a new question into the database.
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func (r *postgresQuestionRepository) Create(ctx context.Context, question *models.Question) (*models.Question, error) {
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query := `
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INSERT INTO questions (quiz_id, text, type, options, order_index)
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VALUES ($1, $2, $3, $4, $5)
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RETURNING id
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`
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err := r.db.QueryRow(ctx, query,
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question.QuizID, question.Text, question.Type, question.Options, question.OrderIndex,
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).Scan(&question.ID)
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if err != nil {
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return nil, err
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}
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return question, nil
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}
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// GetByQuizID retrieves all questions for a given quiz ID.
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func (r *postgresQuestionRepository) GetByQuizID(ctx context.Context, quizID int) ([]models.Question, error) {
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query := `
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SELECT id, quiz_id, text, type, options, order_index
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FROM questions
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WHERE quiz_id = $1
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ORDER BY order_index ASC
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`
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rows, err := r.db.Query(ctx, query, quizID)
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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 questions []models.Question
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for rows.Next() {
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var q models.Question
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if err := rows.Scan(&q.ID, &q.QuizID, &q.Text, &q.Type, &q.Options, &q.OrderIndex); err != nil {
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return nil, err
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}
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questions = append(questions, q)
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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 questions == nil {
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return []models.Question{}, nil
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}
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return questions, nil
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}
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// GetByID retrieves a single question by its ID.
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func (r *postgresQuestionRepository) GetByID(ctx context.Context, id int) (*models.Question, error) {
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query := `
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SELECT id, quiz_id, text, type, options, order_index
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FROM questions
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WHERE id = $1
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`
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var q models.Question
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err := r.db.QueryRow(ctx, query, id).Scan(&q.ID, &q.QuizID, &q.Text, &q.Type, &q.Options, &q.OrderIndex)
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if err != nil {
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return nil, err
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}
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return &q, nil
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}
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// Update updates an existing question
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func (r *postgresQuestionRepository) Update(ctx context.Context, id int, question *models.Question) (*models.Question, error) {
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query := `
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UPDATE questions
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SET text = $2, type = $3, options = $4, order_index = $5
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WHERE id = $1
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RETURNING id, quiz_id, text, type, options, order_index
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`
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var q models.Question
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err := r.db.QueryRow(ctx, query,
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id, question.Text, question.Type, question.Options, question.OrderIndex,
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).Scan(&q.ID, &q.QuizID, &q.Text, &q.Type, &q.Options, &q.OrderIndex)
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if err != nil {
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return nil, err
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}
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return &q, nil
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}
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// Delete deletes a question
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func (r *postgresQuestionRepository) Delete(ctx context.Context, id int) error {
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_, err := r.db.Exec(ctx, "DELETE FROM questions WHERE id = $1", id)
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return err
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}
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