crossover

backend-go/internal/handlers/alert_event.go

@@ -0,0 +1,89 @@
+package handlers
+
+import (
+	"log"
+	"net/http"
+	"strconv"
+	"time"
+
+	"github.com/kjannette/koin-ping/backend-go/internal/domain"
+	"github.com/kjannette/koin-ping/backend-go/internal/middleware"
+	"github.com/kjannette/koin-ping/backend-go/internal/models"
+)
+
+type AlertEventHandler struct {
+	alertEvents *models.AlertEventModel
+}
+
+func NewAlertEventHandler(alertEvents *models.AlertEventModel) *AlertEventHandler {
+	return &AlertEventHandler{alertEvents: alertEvents}
+}
+
+func (h *AlertEventHandler) List(w http.ResponseWriter, r *http.Request) {
+	userID := middleware.GetUserID(r.Context())
+
+	limitStr := r.URL.Query().Get("limit")
+	limit := 20
+	if limitStr != "" {
+		if n, err := strconv.Atoi(limitStr); err == nil {
+			limit = n
+		}
+	}
+
+	log.Printf("User %s listing alert events (limit: %d)", userID, limit)
+
+	if limit < 1 || limit > 100 {
+		writeError(w, http.StatusBadRequest, "VALIDATION_ERROR", "Limit must be between 1 and 100")
+		return
+	}
+
+	events, err := h.alertEvents.ListRecentByUser(r.Context(), userID, limit)
+	if err != nil {
+		log.Printf("Error listing alert events: %v", err)
+		writeError(w, http.StatusInternalServerError, "INTERNAL_ERROR", "Failed to list alert events")
+		return
+	}
+
+	log.Printf("Found %d alert events for user", len(events))
+
+	// MVP scaffolding: return mock data if DB is empty
+	if len(events) == 0 {
+		events = mockEvents(limit)
+	}
+
+	writeJSON(w, http.StatusOK, events)
+}
+
+func mockEvents(limit int) []domain.AlertEvent {
+	label1 := "Treasury Wallet"
+	label2 := "Cold Storage"
+
+	mocks := []domain.AlertEvent{
+		{
+			ID:           1,
+			AlertRuleID:  1,
+			Message:      "Incoming transaction detected: 5.5 ETH received",
+			AddressLabel: &label1,
+			Timestamp:    time.Now().Add(-2 * time.Hour),
+		},
+		{
+			ID:           2,
+			AlertRuleID:  2,
+			Message:      "Balance dropped below threshold: Current balance 8.2 ETH",
+			AddressLabel: &label1,
+			Timestamp:    time.Now().Add(-5 * time.Hour),
+		},
+		{
+			ID:           3,
+			AlertRuleID:  3,
+			Message:      "Outgoing transaction detected: 2.0 ETH sent",
+			AddressLabel: &label2,
+			Timestamp:    time.Now().Add(-24 * time.Hour),
+		},
+	}
+
+	if limit < len(mocks) {
+		return mocks[:limit]
+	}
+	return mocks
+}