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https://github.com/go-gitea/gitea
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f3eb835886
Clarify when "string" should be used (and be escaped), and when "template.HTML" should be used (no need to escape) And help PRs like #29059 , to render the error messages correctly.
65 lines
1.6 KiB
Go
65 lines
1.6 KiB
Go
// Copyright 2020 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package middleware
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import (
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"fmt"
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"html/template"
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"net/url"
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)
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// Flash represents a one time data transfer between two requests.
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type Flash struct {
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DataStore ContextDataStore
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url.Values
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ErrorMsg, WarningMsg, InfoMsg, SuccessMsg string
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}
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func (f *Flash) set(name, msg string, current ...bool) {
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if f.Values == nil {
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f.Values = make(map[string][]string)
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}
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showInCurrentPage := len(current) > 0 && current[0]
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if showInCurrentPage {
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// assign it to the context data, then the template can use ".Flash.XxxMsg" to render the message
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f.DataStore.GetData()["Flash"] = f
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} else {
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// the message map will be saved into the cookie and be shown in next response (a new page response which decodes the cookie)
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f.Set(name, msg)
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}
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}
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func flashMsgStringOrHTML(msg any) string {
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switch v := msg.(type) {
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case string:
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return v
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case template.HTML:
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return string(v)
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}
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panic(fmt.Sprintf("unknown type: %T", msg))
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}
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// Error sets error message
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func (f *Flash) Error(msg any, current ...bool) {
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f.ErrorMsg = flashMsgStringOrHTML(msg)
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f.set("error", f.ErrorMsg, current...)
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}
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// Warning sets warning message
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func (f *Flash) Warning(msg any, current ...bool) {
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f.WarningMsg = flashMsgStringOrHTML(msg)
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f.set("warning", f.WarningMsg, current...)
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}
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// Info sets info message
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func (f *Flash) Info(msg any, current ...bool) {
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f.InfoMsg = flashMsgStringOrHTML(msg)
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f.set("info", f.InfoMsg, current...)
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}
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// Success sets success message
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func (f *Flash) Success(msg any, current ...bool) {
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f.SuccessMsg = flashMsgStringOrHTML(msg)
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f.set("success", f.SuccessMsg, current...)
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}
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