feat: recurring expenses and reports

internal/scheduler/scheduler.go

@@ -0,0 +1,47 @@
+package scheduler
+
+import (
+	"context"
+	"log/slog"
+	"time"
+
+	"git.juancwu.dev/juancwu/budgit/internal/service"
+)
+
+type Scheduler struct {
+	recurringService *service.RecurringExpenseService
+	interval         time.Duration
+}
+
+func New(recurringService *service.RecurringExpenseService) *Scheduler {
+	return &Scheduler{
+		recurringService: recurringService,
+		interval:         1 * time.Hour,
+	}
+}
+
+func (s *Scheduler) Start(ctx context.Context) {
+	// Run immediately on startup to catch up missed recurrences
+	s.run()
+
+	ticker := time.NewTicker(s.interval)
+	defer ticker.Stop()
+
+	for {
+		select {
+		case <-ctx.Done():
+			slog.Info("scheduler stopping")
+			return
+		case <-ticker.C:
+			s.run()
+		}
+	}
+}
+
+func (s *Scheduler) run() {
+	slog.Info("scheduler: processing due recurring expenses")
+	now := time.Now()
+	if err := s.recurringService.ProcessDueRecurrences(now); err != nil {
+		slog.Error("scheduler: failed to process recurring expenses", "error", err)
+	}
+}