first commit

Made-with: Cursor

internal/scheduler/scheduler.go

@@ -0,0 +1,63 @@
+package scheduler
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"time"
+
+	"github.com/google/uuid"
+	"github.com/hibiken/asynq"
+)
+
+const TypeReminder = "reminder:send"
+
+type ReminderPayload struct {
+	EventID    uuid.UUID `json:"event_id"`
+	ReminderID uuid.UUID `json:"reminder_id"`
+	UserID     uuid.UUID `json:"user_id"`
+}
+
+type Scheduler struct {
+	client *asynq.Client
+}
+
+func NewScheduler(redisAddr string) *Scheduler {
+	client := asynq.NewClient(asynq.RedisClientOpt{Addr: redisAddr})
+	return &Scheduler{client: client}
+}
+
+func (s *Scheduler) ScheduleReminder(_ context.Context, eventID, reminderID, userID uuid.UUID, triggerAt time.Time) error {
+	payload, err := json.Marshal(ReminderPayload{
+		EventID:    eventID,
+		ReminderID: reminderID,
+		UserID:     userID,
+	})
+	if err != nil {
+		return fmt.Errorf("marshal reminder payload: %w", err)
+	}
+
+	task := asynq.NewTask(TypeReminder, payload)
+	_, err = s.client.Enqueue(task,
+		asynq.ProcessAt(triggerAt),
+		asynq.MaxRetry(5),
+		asynq.Queue("reminders"),
+	)
+	if err != nil {
+		return fmt.Errorf("enqueue reminder: %w", err)
+	}
+
+	return nil
+}
+
+func (s *Scheduler) Close() error {
+	return s.client.Close()
+}
+
+type NoopScheduler struct{}
+
+func (NoopScheduler) ScheduleReminder(_ context.Context, _, _, _ uuid.UUID, _ time.Time) error {
+	return nil
+}
+
+func (NoopScheduler) Close() error { return nil }