Initial MVP commit

internal/application/alerts/service.go

@@ -0,0 +1,57 @@
+package alerts
+
+import (
+	"context"
+	"fmt"
+	"time"
+
+	"gitea.maximumdirect.net/ejr/weatherapi/internal/core/ports"
+)
+
+type Service struct {
+	repo ports.AlertRepository
+}
+
+func NewService(repo ports.AlertRepository) *Service {
+	return &Service{repo: repo}
+}
+
+type Response struct {
+	Alerts []AlertResponse `json:"alerts"`
+}
+
+type AlertResponse struct {
+	Effective   *time.Time `json:"effective"`
+	Expires     *time.Time `json:"expires"`
+	Severity    *string    `json:"severity"`
+	Event       *string    `json:"event"`
+	Headline    *string    `json:"headline"`
+	Instruction *string    `json:"instruction"`
+	Description *string    `json:"description"`
+}
+
+func (s *Service) GetCurrent(ctx context.Context) (Response, error) {
+	if s == nil {
+		return Response{}, fmt.Errorf("alerts service is nil")
+	}
+
+	rows, err := s.repo.ListCurrentAlerts(ctx)
+	if err != nil {
+		return Response{}, err
+	}
+
+	alerts := make([]AlertResponse, 0, len(rows))
+	for _, row := range rows {
+		alerts = append(alerts, AlertResponse{
+			Effective:   row.Effective,
+			Expires:     row.Expires,
+			Severity:    row.Severity,
+			Event:       row.Event,
+			Headline:    row.Headline,
+			Instruction: row.Instruction,
+			Description: row.Description,
+		})
+	}
+
+	return Response{Alerts: alerts}, nil
+}