84 lines
2.1 KiB
Go
84 lines
2.1 KiB
Go
package repository
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import (
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"context"
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"errors"
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"git.sch9.ru/new_gate/ms-tester/internal/models"
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"git.sch9.ru/new_gate/ms-tester/pkg/utils"
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"github.com/jackc/pgerrcode"
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"github.com/jackc/pgx/v5/pgconn"
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"github.com/jmoiron/sqlx"
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"go.uber.org/zap"
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)
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type ProblemRepository struct {
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db *sqlx.DB
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logger *zap.Logger
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}
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func NewProblemRepository(db *sqlx.DB, logger *zap.Logger) *ProblemRepository {
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return &ProblemRepository{
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db: db,
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logger: logger,
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}
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}
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const createProblemQuery = "INSERT INTO problems (title) VALUES (?) RETURNING id"
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func (r *ProblemRepository) CreateProblem(ctx context.Context, title string) (int32, error) {
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query := r.db.Rebind(createProblemQuery)
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rows, err := r.db.QueryxContext(ctx, query, title)
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if err != nil {
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return 0, handlePgErr(err)
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}
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defer rows.Close()
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var id int32
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rows.Next()
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err = rows.Scan(&id)
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if err != nil {
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return 0, handlePgErr(err)
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}
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return id, nil
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}
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const readProblemQuery = "SELECT * from problems WHERE id=? LIMIT 1"
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func (r *ProblemRepository) ReadProblemById(ctx context.Context, id int32) (*models.Problem, error) {
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var problem models.Problem
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query := r.db.Rebind(readProblemQuery)
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err := r.db.GetContext(ctx, &problem, query, id)
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if err != nil {
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return nil, handlePgErr(err)
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}
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return &problem, nil
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}
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const deleteProblemQuery = "DELETE FROM problems WHERE id=?"
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func (r *ProblemRepository) DeleteProblem(ctx context.Context, id int32) error {
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query := r.db.Rebind(deleteProblemQuery)
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_, err := r.db.ExecContext(ctx, query, id)
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if err != nil {
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return handlePgErr(err)
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}
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return nil
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}
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func handlePgErr(err error) error {
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var pgErr *pgconn.PgError
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if !errors.As(err, &pgErr) {
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return utils.StorageError(err, utils.ErrUnknown, "unexpected error from postgres")
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}
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if pgerrcode.IsIntegrityConstraintViolation(pgErr.Code) {
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// TODO: probably should specify which constraint
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return utils.StorageError(err, utils.ErrConflict, pgErr.Message)
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}
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if pgerrcode.IsNoData(pgErr.Code) {
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return utils.StorageError(err, utils.ErrNotFound, pgErr.Message)
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}
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return utils.StorageError(err, utils.ErrUnimplemented, "unimplemented error")
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}
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