basic online

internal/handler/variance.go

@@ -0,0 +1,64 @@
+package handler
+
+import (
+	"net/http"
+	"strconv"
+
+	"Engine/internal/model"
+	"Engine/internal/service"
+)
+
+type VarianceHandler struct {
+	svc *service.VarianceService
+}
+
+func NewVarianceHandler(svc *service.VarianceService) *VarianceHandler {
+	return &VarianceHandler{svc: svc}
+}
+
+func (h *VarianceHandler) Report(w http.ResponseWriter, r *http.Request) {
+	f := filterFromQuery(r)
+	report, err := h.svc.Report(r.Context(), f)
+	if err != nil {
+		writeError(w, http.StatusInternalServerError, err.Error())
+		return
+	}
+	writeJSON(w, http.StatusOK, report)
+}
+
+func (h *VarianceHandler) Alerts(w http.ResponseWriter, r *http.Request) {
+	f := filterFromQuery(r)
+
+	threshold := 10.0
+	if t := r.URL.Query().Get("threshold"); t != "" {
+		if v, err := strconv.ParseFloat(t, 64); err == nil {
+			threshold = v
+		}
+	}
+
+	alerts, err := h.svc.Alerts(r.Context(), f, threshold)
+	if err != nil {
+		writeError(w, http.StatusInternalServerError, err.Error())
+		return
+	}
+	writeJSON(w, http.StatusOK, alerts)
+}
+
+func filterFromQuery(r *http.Request) service.VarianceFilter {
+	q := r.URL.Query()
+
+	year, _ := strconv.Atoi(q.Get("year"))
+	period, _ := strconv.Atoi(q.Get("period"))
+
+	version := model.BudgetVersion(q.Get("version"))
+	if version == "" {
+		version = model.VersionOriginal
+	}
+
+	return service.VarianceFilter{
+		FiscalYear:   year,
+		FiscalPeriod: period,
+		DeptCode:     q.Get("dept"),
+		Version:      version,
+	}
+}