95 lines
1.7 KiB
Go
95 lines
1.7 KiB
Go
package link
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import (
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"context"
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"errors"
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"github.com/jackc/pgtype"
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"github.com/jackc/pgx/v4"
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"github.com/jackc/pgx/v4/pgxpool"
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"net/url"
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)
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type Repository interface {
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Save(link *Link) error
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FindById(id string) (*Link, error)
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DeleteById(id string) error
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}
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type PgRepository struct {
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pool *pgxpool.Pool
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}
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func (r *PgRepository) Save(link *Link) error {
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ctx := context.Background()
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tx, err := r.pool.Begin(ctx)
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if err != nil {
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return err
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}
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sql := `
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INSERT INTO links (id, name, redirect_url, creation_time)
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VALUES ($1, $2, $3, $4::timestamp)
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`
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_, err = tx.Exec(ctx, sql, link.Id, link.Name, link.RedirectURL.String(), link.CreationTime.Format("2006-01-02 15:04:05"))
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if err != nil {
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_ = tx.Rollback(ctx)
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return err
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}
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if err = tx.Commit(ctx); err != nil {
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return err
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}
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return nil
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}
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func (r *PgRepository) FindById(id string) (*Link, error) {
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ctx := context.Background()
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tx, err := r.pool.Begin(ctx)
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if err != nil {
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return nil, err
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}
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sql := `
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SELECT id, name, redirect_url, creation_time
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FROM links
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WHERE id = $1
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`
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entity, err := mapRowToEntity(tx.QueryRow(ctx, sql, id))
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if err != nil {
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if errors.Is(err, pgx.ErrNoRows) {
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return nil, nil
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} else {
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_ = tx.Rollback(ctx)
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return nil, err
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}
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}
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if err = tx.Commit(ctx); err != nil {
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return nil, err
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}
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return entity, nil
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}
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func mapRowToEntity(r pgx.Row) (*Link, error) {
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var entity Link
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var urlStr string
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var t pgtype.Timestamp
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if err := r.Scan(&entity.Id, &entity.Name, &urlStr, &t); err != nil {
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return nil, err
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}
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u, err := url.Parse(urlStr)
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if err != nil {
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return nil, err
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}
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entity.RedirectURL = *u
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entity.CreationTime = t.Time
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return &entity, nil
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}
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