forgejo/modules/templates/helper.go
KN4CK3R 637451a45e
Rework markup link rendering (#26745)
Fixes #26548

This PR refactors the rendering of markup links. The old code uses
`strings.Replace` to change some urls while the new code uses more
context to decide which link should be generated.

The added tests should ensure the same output for the old and new
behaviour (besides the bug).

We may need to refactor the rendering a bit more to make it clear how
the different helper methods render the input string. There are lots of
options (resolve links / images / mentions / git hashes / emojis / ...)
but you don't really know what helper uses which options. For example,
we currently support images in the user description which should not be
allowed I think:

<details>
  <summary>Profile</summary> 

https://try.gitea.io/KN4CK3R

![grafik](https://github.com/go-gitea/gitea/assets/1666336/109ae422-496d-4200-b52e-b3a528f553e5)

</details>

---------

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
2024-01-15 08:49:24 +00:00

207 lines
6.6 KiB
Go

// Copyright 2018 The Gitea Authors. All rights reserved.
// Copyright 2014 The Gogs Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package templates
import (
"fmt"
"html"
"html/template"
"net/url"
"strings"
"time"
user_model "code.gitea.io/gitea/models/user"
"code.gitea.io/gitea/modules/base"
"code.gitea.io/gitea/modules/emoji"
"code.gitea.io/gitea/modules/markup"
"code.gitea.io/gitea/modules/setting"
"code.gitea.io/gitea/modules/svg"
"code.gitea.io/gitea/modules/templates/eval"
"code.gitea.io/gitea/modules/timeutil"
"code.gitea.io/gitea/modules/util"
"code.gitea.io/gitea/services/gitdiff"
)
// NewFuncMap returns functions for injecting to templates
func NewFuncMap() template.FuncMap {
return map[string]any{
"ctx": func() any { return nil }, // template context function
"DumpVar": dumpVar,
// -----------------------------------------------------------------
// html/template related functions
"dict": dict, // it's lowercase because this name has been widely used. Our other functions should have uppercase names.
"Eval": Eval,
"Safe": Safe,
"Escape": html.EscapeString,
"QueryEscape": url.QueryEscape,
"JSEscape": template.JSEscapeString,
"Str2html": Str2html, // TODO: rename it to SanitizeHTML
"URLJoin": util.URLJoin,
"DotEscape": DotEscape,
"PathEscape": url.PathEscape,
"PathEscapeSegments": util.PathEscapeSegments,
// utils
"StringUtils": NewStringUtils,
"SliceUtils": NewSliceUtils,
"JsonUtils": NewJsonUtils,
// -----------------------------------------------------------------
// svg / avatar / icon
"svg": svg.RenderHTML,
"EntryIcon": base.EntryIcon,
"MigrationIcon": MigrationIcon,
"ActionIcon": ActionIcon,
"SortArrow": SortArrow,
// -----------------------------------------------------------------
// time / number / format
"FileSize": base.FileSize,
"CountFmt": base.FormatNumberSI,
"TimeSince": timeutil.TimeSince,
"TimeSinceUnix": timeutil.TimeSinceUnix,
"DateTime": timeutil.DateTime,
"Sec2Time": util.SecToTime,
"LoadTimes": func(startTime time.Time) string {
return fmt.Sprint(time.Since(startTime).Nanoseconds()/1e6) + "ms"
},
// -----------------------------------------------------------------
// setting
"AppName": func() string {
return setting.AppName
},
"AppSubUrl": func() string {
return setting.AppSubURL
},
"AssetUrlPrefix": func() string {
return setting.StaticURLPrefix + "/assets"
},
"AppUrl": func() string {
// The usage of AppUrl should be avoided as much as possible,
// because the AppURL(ROOT_URL) may not match user's visiting site and the ROOT_URL in app.ini may be incorrect.
// And it's difficult for Gitea to guess absolute URL correctly with zero configuration,
// because Gitea doesn't know whether the scheme is HTTP or HTTPS unless the reverse proxy could tell Gitea.
return setting.AppURL
},
"AppVer": func() string {
return setting.AppVer
},
"AppDomain": func() string { // documented in mail-templates.md
return setting.Domain
},
"AssetVersion": func() string {
return setting.AssetVersion
},
"DefaultShowFullName": func() bool {
return setting.UI.DefaultShowFullName
},
"ShowFooterTemplateLoadTime": func() bool {
return setting.Other.ShowFooterTemplateLoadTime
},
"AllowedReactions": func() []string {
return setting.UI.Reactions
},
"CustomEmojis": func() map[string]string {
return setting.UI.CustomEmojisMap
},
"MetaAuthor": func() string {
return setting.UI.Meta.Author
},
"MetaDescription": func() string {
return setting.UI.Meta.Description
},
"MetaKeywords": func() string {
return setting.UI.Meta.Keywords
},
"EnableTimetracking": func() bool {
return setting.Service.EnableTimetracking
},
"DisableGitHooks": func() bool {
return setting.DisableGitHooks
},
"DisableWebhooks": func() bool {
return setting.DisableWebhooks
},
"DisableImportLocal": func() bool {
return !setting.ImportLocalPaths
},
"ThemeName": func(user *user_model.User) string {
if user == nil || user.Theme == "" {
return setting.UI.DefaultTheme
}
return user.Theme
},
"NotificationSettings": func() map[string]any {
return map[string]any{
"MinTimeout": int(setting.UI.Notification.MinTimeout / time.Millisecond),
"TimeoutStep": int(setting.UI.Notification.TimeoutStep / time.Millisecond),
"MaxTimeout": int(setting.UI.Notification.MaxTimeout / time.Millisecond),
"EventSourceUpdateTime": int(setting.UI.Notification.EventSourceUpdateTime / time.Millisecond),
}
},
"MermaidMaxSourceCharacters": func() int {
return setting.MermaidMaxSourceCharacters
},
// -----------------------------------------------------------------
// render
"RenderCommitMessage": RenderCommitMessage,
"RenderCommitMessageLinkSubject": RenderCommitMessageLinkSubject,
"RenderCommitBody": RenderCommitBody,
"RenderCodeBlock": RenderCodeBlock,
"RenderIssueTitle": RenderIssueTitle,
"RenderEmoji": RenderEmoji,
"RenderEmojiPlain": emoji.ReplaceAliases,
"ReactionToEmoji": ReactionToEmoji,
"RenderMarkdownToHtml": RenderMarkdownToHtml,
"RenderLabel": RenderLabel,
"RenderLabels": RenderLabels,
// -----------------------------------------------------------------
// misc
"ShortSha": base.ShortSha,
"ActionContent2Commits": ActionContent2Commits,
"IsMultilineCommitMessage": IsMultilineCommitMessage,
"CommentMustAsDiff": gitdiff.CommentMustAsDiff,
"MirrorRemoteAddress": mirrorRemoteAddress,
"FilenameIsImage": FilenameIsImage,
"TabSizeClass": TabSizeClass,
}
}
// Safe render raw as HTML
func Safe(raw string) template.HTML {
return template.HTML(raw)
}
// Str2html render Markdown text to HTML
func Str2html(raw string) template.HTML {
return template.HTML(markup.Sanitize(raw))
}
// DotEscape wraps a dots in names with ZWJ [U+200D] in order to prevent autolinkers from detecting these as urls
func DotEscape(raw string) string {
return strings.ReplaceAll(raw, ".", "\u200d.\u200d")
}
// Eval the expression and return the result, see the comment of eval.Expr for details.
// To use this helper function in templates, pass each token as a separate parameter.
//
// {{ $int64 := Eval $var "+" 1 }}
// {{ $float64 := Eval $var "+" 1.0 }}
//
// Golang's template supports comparable int types, so the int64 result can be used in later statements like {{if lt $int64 10}}
func Eval(tokens ...any) (any, error) {
n, err := eval.Expr(tokens...)
return n.Value, err
}