Extract telemetry parameters into a separate method

lib/ruby_lsp/handler.rb

@@ -159,22 +159,35 @@ def respond_with_document_highlight(uri, position)
     end
 
     def with_telemetry(request)
-      params = { request: request[:method], lspVersion: RubyLsp::VERSION }
       result = nil
+      error = nil
 
       request_time = Benchmark.realtime do
         result = yield
       rescue StandardError => e
-        params[:errorClass] = e.class.name
-        params[:errorMessage] = e.message
+        error = e
       end
 
+      @writer.write(method: "telemetry/event", params: telemetry_params(request, request_time, error))
+      result
+    end
+
+    def telemetry_params(request, request_time, error)
       uri = request.dig(:params, :textDocument, :uri)
-      params[:uri] = uri if uri
-      params[:requestTime] = request_time
 
-      @writer.write(method: "telemetry/event", params: params)
-      result
+      params = {
+        request: request[:method],
+        lspVersion: RubyLsp::VERSION,
+        requestTime: request_time,
+      }
+
+      if error
+        params[:errorClass] = error.class.name
+        params[:errorMessage] = error.message
+      end
+
+      params[:uri] = uri if uri
+      params
     end
   end
 end