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// Copyright 2014 The Gogs Authors. All rights reserved.
// Copyright 2023 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package common
import (
"errors"
"fmt"
"net/http"
"path"
"strings"
"code.gitea.io/gitea/modules/httplib"
"code.gitea.io/gitea/modules/markup"
"code.gitea.io/gitea/modules/markup/markdown"
"code.gitea.io/gitea/modules/setting"
"code.gitea.io/gitea/modules/util"
"code.gitea.io/gitea/services/context"
)
// RenderMarkup renders markup text for the /markup and /markdown endpoints
func RenderMarkup(ctx *context.Base, repo *context.Repository, mode, text, urlPathContext, filePath string) {
// urlPathContext format is "/subpath/{user}/{repo}/src/{branch, commit, tag}/{identifier/path}/{file/dir}"
// filePath is the path of the file to render if the end user is trying to preview a repo file (mode == "file")
// filePath will be used as RenderContext.RelativePath
// for example, when previewing file "/gitea/owner/repo/src/branch/features/feat-123/doc/CHANGE.md", then filePath is "doc/CHANGE.md"
// and the urlPathContext is "/gitea/owner/repo/src/branch/features/feat-123/doc"
renderCtx := &markup.RenderContext{
Ctx: ctx,
Links: markup.Links{AbsolutePrefix: true},
MarkupType: markdown.MarkupName,
}
if urlPathContext != "" {
renderCtx.Links.Base = fmt.Sprintf("%s%s", httplib.GuessCurrentHostURL(ctx), urlPathContext)
}
if mode == "" || mode == "markdown" {
// raw markdown doesn't need any special handling
if err := markdown.RenderRaw(renderCtx, strings.NewReader(text), ctx.Resp); err != nil {
ctx.Error(http.StatusInternalServerError, err.Error())
}
return
}
switch mode {
case "gfm": // legacy mode, do nothing
case "comment":
renderCtx.ContentMode = markup.RenderContentAsComment
case "wiki":
renderCtx.ContentMode = markup.RenderContentAsWiki
case "file":
// render the repo file content by its extension
renderCtx.MarkupType = ""
renderCtx.RelativePath = filePath
renderCtx.InStandalonePage = true
default:
ctx.Error(http.StatusUnprocessableEntity, fmt.Sprintf("Unknown mode: %s", mode))
return
}
fields := strings.SplitN(strings.TrimPrefix(urlPathContext, setting.AppSubURL+"/"), "/", 5)
if len(fields) == 5 && fields[2] == "src" && (fields[3] == "branch" || fields[3] == "commit" || fields[3] == "tag") {
// absolute base prefix is something like "https://host/subpath/{user}/{repo}"
absoluteBasePrefix := fmt.Sprintf("%s%s/%s", httplib.GuessCurrentAppURL(ctx), fields[0], fields[1])
fileDir := path.Dir(filePath) // it is "doc" if filePath is "doc/CHANGE.md"
refPath := strings.Join(fields[3:], "/") // it is "branch/features/feat-12/doc"
refPath = strings.TrimSuffix(refPath, "/"+fileDir) // now we get the correct branch path: "branch/features/feat-12"
renderCtx.Links = markup.Links{AbsolutePrefix: true, Base: absoluteBasePrefix, BranchPath: refPath, TreePath: fileDir}
}
if repo != nil && repo.Repository != nil {
renderCtx.Repo = repo.Repository
if renderCtx.ContentMode == markup.RenderContentAsComment {
renderCtx.Metas = repo.Repository.ComposeMetas(ctx)
} else {
renderCtx.Metas = repo.Repository.ComposeDocumentMetas(ctx)
}
}
if err := markup.Render(renderCtx, strings.NewReader(text), ctx.Resp); err != nil {
if errors.Is(err, util.ErrInvalidArgument) {
ctx.Error(http.StatusUnprocessableEntity, err.Error())
} else {
ctx.Error(http.StatusInternalServerError, err.Error())
}
return
}
}
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