feat: add scheduled automatic task matching

internal/tasks/service.go

@@ -77,6 +77,8 @@ type Order struct {
 	Status           string           `json:"status"`
 	StatusText       string           `json:"status_text"`
 	Message          string           `json:"message"`
+	ScheduledMatchAt string           `json:"scheduled_match_at,omitempty"`
+	DispatchDelay    int              `json:"dispatch_delay_seconds,omitempty"`
 	DeadlineAt       string           `json:"deadline_at"`
 	CreatedAt        string           `json:"created_at"`
 	UpdatedAt        string           `json:"updated_at"`
@@ -235,14 +237,39 @@ func (s *Service) Claim(ctx context.Context, tenantID, memberID, hallID int64) (
 	}
 	now := s.now().UTC()
 	row, err := s.repository.ClaimTask(ctx, store.ClaimTaskInput{TenantID: tenantID, MemberID: memberID,
-		HallID: hallID, MinimumAmount: policy.MinimumAmount, DeadlineAt: now.Add(policy.Deadline), OrderNo: newNumber("TO", now)})
+		HallID: hallID, MinimumAmount: policy.MinimumAmount, AutoDelay: policy.AutoDelay,
+		DeadlineAt: now.Add(policy.Deadline), OrderNo: newNumber("TO", now)})
 	if err != nil {
 		return nil, err
 	}
 	result := orderFromStore(*row, false)
+	s.scheduleAutoMatch(tenantID, memberID, row.ID, row.RuleSnapshot, policy)
 	return &result, nil
 }
 
+func (s *Service) scheduleAutoMatch(tenantID, memberID, orderID int64, raw json.RawMessage, policy taskPolicy) {
+	var snapshot map[string]any
+	if json.Unmarshal(raw, &snapshot) != nil || snapshot["dispatch_mode"] != "auto" {
+		return
+	}
+	matchAt, err := time.Parse(time.RFC3339, fmt.Sprint(snapshot["scheduled_match_at"]))
+	if err != nil {
+		return
+	}
+	delay := time.Until(matchAt)
+	if delay < 0 {
+		delay = 0
+	}
+	go func() {
+		timer := time.NewTimer(delay)
+		defer timer.Stop()
+		<-timer.C
+		ctx, cancel := context.WithTimeout(context.Background(), 15*time.Second)
+		defer cancel()
+		_ = s.repository.AutoMatchTaskOrder(ctx, tenantID, memberID, orderID, policy.AutoDelay, policy.AutoMinAmount, policy.AutoMaxAmount)
+	}()
+}
+
 func (s *Service) Orders(ctx context.Context, tenantID, memberID int64, page, pageSize int, status string) (*OrderPage, error) {
 	if page == 0 {
 		page = 1
@@ -368,6 +395,11 @@ func orderFromStore(row store.TaskOrder, detail bool) Order {
 		UnitPriceAmount: row.UnitPriceAmount, TotalAmount: row.TotalAmount, CommissionAmount: row.CommissionAmount,
 		Currency: row.Currency, Status: status, StatusText: orderStatusText(row.OrderStatus), Message: row.Message,
 		DeadlineAt: row.DeadlineAt, CreatedAt: row.CreatedAt, UpdatedAt: row.UpdatedAt}
+	var snapshot map[string]any
+	if json.Unmarshal(row.RuleSnapshot, &snapshot) == nil {
+		result.ScheduledMatchAt, _ = snapshot["scheduled_match_at"].(string)
+		result.DispatchDelay = intValue(snapshot["dispatch_delay_seconds"])
+	}
 	if !detail {
 		return result
 	}