feat: translation middleware

internal/templer/middleware.go

@@ -0,0 +1,34 @@
+package templer
+
+import (
+	"context"
+	"log/slog"
+	"net/http"
+	"strings"
+)
+
+type ctxKey int
+
+const (
+	pathKey ctxKey = iota
+)
+
+func Middleware(next http.Handler) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		ctx := r.Context()
+
+		ctx = context.WithValue(ctx, pathKey, r.URL.Path)
+
+		next.ServeHTTP(w, r.WithContext(ctx))
+	}
+}
+
+// Path returns the current path without a leading slash
+func Path(ctx context.Context) string {
+	path, ok := ctx.Value(pathKey).(string)
+	if !ok {
+		slog.Error("could not extract request path from context")
+		return ""
+	}
+	return strings.TrimPrefix(path, "/")
+}