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// Copyright 2020 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package middleware
import (
"fmt"
"html/template"
"net/http"
"net/url"
"code.gitea.io/gitea/modules/reqctx"
)
// Flash represents a one time data transfer between two requests.
type Flash struct {
DataStore reqctx.RequestDataStore
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 message
func (f *Flash) Error(msg any, current ...bool) {
f.ErrorMsg = flashMsgStringOrHTML(msg)
f.set("error", f.ErrorMsg, current...)
}
// Warning sets warning message
func (f *Flash) Warning(msg any, current ...bool) {
f.WarningMsg = flashMsgStringOrHTML(msg)
f.set("warning", f.WarningMsg, current...)
}
// Info sets info message
func (f *Flash) Info(msg any, current ...bool) {
f.InfoMsg = flashMsgStringOrHTML(msg)
f.set("info", f.InfoMsg, current...)
}
// Success sets success message
func (f *Flash) Success(msg any, current ...bool) {
f.SuccessMsg = flashMsgStringOrHTML(msg)
f.set("success", f.SuccessMsg, current...)
}
func ParseCookieFlashMessage(val string) *Flash {
if vals, _ := url.ParseQuery(val); len(vals) > 0 {
return &Flash{
Values: vals,
ErrorMsg: vals.Get("error"),
SuccessMsg: vals.Get("success"),
InfoMsg: vals.Get("info"),
WarningMsg: vals.Get("warning"),
}
}
return nil
}
func GetSiteCookieFlashMessage(dataStore reqctx.RequestDataStore, req *http.Request, cookieName string) (string, *Flash) {
// Get the last flash message from cookie
lastFlashCookie := GetSiteCookie(req, cookieName)
lastFlashMsg := ParseCookieFlashMessage(lastFlashCookie)
if lastFlashMsg != nil {
lastFlashMsg.DataStore = dataStore
return lastFlashCookie, lastFlashMsg
}
return lastFlashCookie, nil
}
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