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// SPDX-License-Identifier: AGPL-3.0-only
// SPDX-FileContributor: Runxi Yu <https://runxiyu.org>
package main
import (
"bytes"
"html/template"
"net/http"
"path"
"strings"
"time"
"github.com/alecthomas/chroma/v2"
chromaHTML "github.com/alecthomas/chroma/v2/formatters/html"
chromaLexers "github.com/alecthomas/chroma/v2/lexers"
chromaStyles "github.com/alecthomas/chroma/v2/styles"
"github.com/go-git/go-git/v5"
"github.com/go-git/go-git/v5/plumbing"
"github.com/go-git/go-git/v5/plumbing/object"
)
func httpHandleRepoTree(writer http.ResponseWriter, request *http.Request, params map[string]any) {
var rawPathSpec, pathSpec string
var repo *git.Repository
var refHash plumbing.Hash
var refHashSlice []byte
var commitObject *object.Commit
var tree *object.Tree
var err error
rawPathSpec = params["rest"].(string)
repo, pathSpec = params["repo"].(*git.Repository), strings.TrimSuffix(rawPathSpec, "/")
params["path_spec"] = pathSpec
if refHash, err = getRefHash(repo, params["ref_type"].(string), params["ref_name"].(string)); err != nil {
errorPage500(writer, params, "Error getting ref hash: "+err.Error())
return
}
refHashSlice = refHash[:]
cacheHandle := append(refHashSlice, []byte(pathSpec)...)
if value, found := treeReadmeCache.Get(cacheHandle); found {
params["files"] = value.DisplayTree
params["readme_filename"] = value.ReadmeFilename
params["readme"] = value.ReadmeRendered
renderTemplate(writer, "repo_tree_dir", params)
return
}
if value, found := commitPathFileHTMLCache.Get(cacheHandle); found {
params["file_contents"] = value
renderTemplate(writer, "repo_tree_file", params)
return
}
start := time.Now()
var target *object.Tree
if pathSpec == "" {
if commitObject, err = repo.CommitObject(refHash); err != nil {
errorPage500(writer, params, "Error getting commit object: "+err.Error())
return
}
if tree, err = commitObject.Tree(); err != nil {
errorPage500(writer, params, "Error getting file tree: "+err.Error())
return
}
displayTree := makeDisplayTree(tree)
readmeFilename, readmeRendered := renderReadmeAtTree(tree)
cost := time.Since(start).Nanoseconds()
params["files"] = displayTree
params["readme_filename"] = readmeFilename
params["readme"] = readmeRendered
entry := treeReadmeCacheEntry{
DisplayTree: displayTree,
ReadmeFilename: readmeFilename,
ReadmeRendered: readmeRendered,
}
treeReadmeCache.Set(cacheHandle, entry, cost)
renderTemplate(writer, "repo_tree_dir", params)
return
}
if commitObject, err = repo.CommitObject(refHash); err != nil {
errorPage500(writer, params, "Error getting commit object: "+err.Error())
return
}
if tree, err = commitObject.Tree(); err != nil {
errorPage500(writer, params, "Error getting file tree: "+err.Error())
return
}
if target, err = tree.Tree(pathSpec); err != nil {
var file *object.File
var fileContent string
var lexer chroma.Lexer
var iterator chroma.Iterator
var style *chroma.Style
var formatter *chromaHTML.Formatter
var formattedHTML template.HTML
if file, err = tree.File(pathSpec); err != nil {
errorPage500(writer, params, "Error retrieving path: "+err.Error())
return
}
if redirectNoDir(writer, request) {
return
}
if fileContent, err = file.Contents(); err != nil {
errorPage500(writer, params, "Error reading file: "+err.Error())
return
}
lexer = chromaLexers.Match(pathSpec)
if lexer == nil {
lexer = chromaLexers.Fallback
}
if iterator, err = lexer.Tokenise(nil, fileContent); err != nil {
errorPage500(writer, params, "Error tokenizing code: "+err.Error())
return
}
var formattedHTMLStr bytes.Buffer
style = chromaStyles.Get("autumn")
formatter = chromaHTML.New(chromaHTML.WithClasses(true), chromaHTML.TabWidth(8))
if err = formatter.Format(&formattedHTMLStr, style, iterator); err != nil {
errorPage500(writer, params, "Error formatting code: "+err.Error())
return
}
formattedHTML = template.HTML(formattedHTMLStr.Bytes()) //#nosec G203
cost := time.Since(start).Nanoseconds()
commitPathFileHTMLCache.Set(cacheHandle, formattedHTML, cost)
params["file_contents"] = formattedHTML
renderTemplate(writer, "repo_tree_file", params)
return
}
if len(rawPathSpec) != 0 && rawPathSpec[len(rawPathSpec)-1] != '/' {
http.Redirect(writer, request, path.Base(pathSpec)+"/", http.StatusSeeOther)
return
}
displayTree := makeDisplayTree(target)
readmeFilename, readmeRendered := renderReadmeAtTree(target)
cost := time.Since(start).Nanoseconds()
entry := treeReadmeCacheEntry{
DisplayTree: displayTree,
ReadmeFilename: readmeFilename,
ReadmeRendered: readmeRendered,
}
treeReadmeCache.Set(cacheHandle, entry, cost)
params["readme_filename"], params["readme"] = readmeFilename, readmeRendered
params["files"] = displayTree
renderTemplate(writer, "repo_tree_dir", params)
}
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