logout: add support of logout flow

internal/stat/stat.go

@@ -0,0 +1,60 @@
+package stat
+
+import (
+	"encoding/json"
+	"net/http"
+
+	"go.uber.org/zap"
+	"gopkg.i-core.ru/logutil"
+)
+
+// Handler provides HTTP handlers for health checking and versioning.
+type Handler struct {
+	version string
+}
+
+// NewHandler creates a new Handler.
+func NewHandler(version string) *Handler {
+	return &Handler{version: version}
+}
+
+// AddRoutes registers all required routes for the package stat.
+func (h *Handler) AddRoutes(apply func(m, p string, h http.Handler, mws ...func(http.Handler) http.Handler)) {
+	apply(http.MethodGet, "/health/alive", newHealthAliveAndReadyHandler())
+	apply(http.MethodGet, "/health/ready", newHealthAliveAndReadyHandler())
+	apply(http.MethodGet, "/version", newVersionHandler(h.version))
+}
+
+func newHealthAliveAndReadyHandler() http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		log := logutil.FromContext(r.Context())
+		resp := struct {
+			Status string `json:"status"`
+		}{
+			Status: "ok",
+		}
+		w.Header().Set("Content-Type", "application/json")
+		if err := json.NewEncoder(w).Encode(resp); err != nil {
+			log.Info("Failed to marshal health liveness and readiness status", zap.Error(err))
+			http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
+			return
+		}
+	}
+}
+
+func newVersionHandler(version string) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		log := logutil.FromContext(r.Context())
+		resp := struct {
+			Version string `json:"version"`
+		}{
+			Version: version,
+		}
+		w.Header().Set("Content-Type", "application/json")
+		if err := json.NewEncoder(w).Encode(resp); err != nil {
+			log.Info("Failed to marshal version", zap.Error(err))
+			http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
+			return
+		}
+	}
+}