// Copyright 2020 The Gitea Authors. All rights reserved.// SPDX-License-Identifier: MIT package middleware import (	"fmt"	"html/template"	"net/url") // Flash represents a one time data transfer between two requests.type Flash struct {	DataStore ContextDataStore	url.Values	ErrorMsg, WarningMsg, InfoMsg, SuccessMsg string} func (f *Flash) set(name, msg string, current ...bool) {	if f.Values == nil {		f.Values = make(map[string][]string)	}	showInCurrentPage := len(current) > 0 && current[0]	if showInCurrentPage {		// assign it to the context data, then the template can use ".Flash.XxxMsg" to render the message		f.DataStore.GetData()["Flash"] = f	} else {		// the message map will be saved into the cookie and be shown in next response (a new page response which decodes the cookie)		f.Set(name, msg)	}} func flashMsgStringOrHTML(msg any) string {	switch v := msg.(type) {	case string:		return v	case template.HTML:		return string(v)	}	panic(fmt.Sprintf("unknown type: %T", msg))} // Error sets error messagefunc (f *Flash) Error(msg any, current ...bool) {	f.ErrorMsg = flashMsgStringOrHTML(msg)	f.set("error", f.ErrorMsg, current...)} // Warning sets warning messagefunc (f *Flash) Warning(msg any, current ...bool) {	f.WarningMsg = flashMsgStringOrHTML(msg)	f.set("warning", f.WarningMsg, current...)} // Info sets info messagefunc (f *Flash) Info(msg any, current ...bool) {	f.InfoMsg = flashMsgStringOrHTML(msg)	f.set("info", f.InfoMsg, current...)} // Success sets success messagefunc (f *Flash) Success(msg any, current ...bool) {	f.SuccessMsg = flashMsgStringOrHTML(msg)	f.set("success", f.SuccessMsg, current...)}