Peter Stuifzand
6f05bd0f85
All checks were successful
continuous-integration/drone/push Build is passing
63 lines
1.3 KiB
Go
63 lines
1.3 KiB
Go
package storage
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import (
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"database/sql"
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"fmt"
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_ "github.com/lib/pq"
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)
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type postgres struct {
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db *sql.DB
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}
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func New(dsn string) (Service, error) {
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pool, err := sql.Open("postgres", dsn)
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if err != nil {
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return nil, fmt.Errorf("could not open database connection: %v", err)
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}
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return &postgres{pool}, nil
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}
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func (s *postgres) Close() error {
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return s.db.Close()
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}
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func (s *postgres) Subscribe(topic string, sub Subscriber) error {
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_, err := s.db.Exec(
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`INSERT INTO "subscribers" ("topic", "callback", "lease_seconds", "secret", "created") VALUES ($1, $2, $3, $4, now())`,
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topic,
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sub.Callback,
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sub.LeaseSeconds,
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sub.Secret,
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)
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return err
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}
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func (s *postgres) Unsubscribe(topic, callback string) error {
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_, err := s.db.Exec(
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`DELETE FROM "subscribers" WHERE "topic" = ? AND "callback" = $1`,
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topic,
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callback,
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)
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return err
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}
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func (s *postgres) Subscribers(topic string) ([]Subscriber, error) {
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rows, err := s.db.Query(`SELECT callback, lease_seconds, secret, created FROM "subscribers" WHERE "topic" = $1`, topic)
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if err != nil {
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return nil, err
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}
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var subscribers []Subscriber
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for rows.Next() {
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var sub Subscriber
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err := rows.Scan(&sub.Callback, &sub.LeaseSeconds, &sub.Secret, &sub.Created)
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if err != nil {
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return nil, err
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}
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subscribers = append(subscribers, sub)
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}
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return subscribers, nil
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}
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