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package main
import (
"fmt"
"net/http"
"strings"
"github.com/go-git/go-git/v5/plumbing"
"github.com/go-git/go-git/v5/plumbing/filemode"
"github.com/go-git/go-git/v5/plumbing/format/diff"
"go.lindenii.runxiyu.org/lindenii-common/misc"
)
type usable_file_patch struct {
From diff.File
To diff.File
Chunks []usable_chunk
}
type usable_chunk struct {
Operation diff.Operation
Content string
}
func handle_repo_commit(w http.ResponseWriter, r *http.Request, params map[string]any) {
group_name, repo_name, commit_id_specified_string := params["group_name"].(string), params["repo_name"].(string), params["commit_id"].(string)
repo, description, err := open_git_repo(r.Context(), group_name, repo_name)
if err != nil {
http.Error(w, "Error opening repo: "+err.Error(), http.StatusInternalServerError)
return
}
params["repo_description"] = description
commit_id_specified_string_without_suffix := strings.TrimSuffix(commit_id_specified_string, ".patch")
commit_id := plumbing.NewHash(commit_id_specified_string_without_suffix)
commit_object, err := repo.CommitObject(commit_id)
if err != nil {
http.Error(w, "Error getting commit object: "+err.Error(), http.StatusInternalServerError)
return
}
if commit_id_specified_string_without_suffix != commit_id_specified_string {
patch, err := format_patch_from_commit(commit_object)
if err != nil {
http.Error(w, "Error formatting patch: "+err.Error(), http.StatusInternalServerError)
return
}
fmt.Fprintln(w, patch)
return
}
commit_id_string := commit_object.Hash.String()
if commit_id_string != commit_id_specified_string {
http.Redirect(w, r, commit_id_string, http.StatusSeeOther)
return
}
params["commit_object"] = commit_object
params["commit_id"] = commit_id_string
parent_commit_hash, patch, err := get_patch_from_commit(commit_object)
if err != nil {
http.Error(w, "Error getting patch from commit: "+err.Error(), http.StatusInternalServerError)
return
}
params["parent_commit_hash"] = parent_commit_hash.String()
params["patch"] = patch
// TODO: Remove unnecessary context
// TODO: Prepend "+"/"-"/" " instead of solely distinguishing based on color
usable_file_patches := make([]usable_file_patch, 0)
for _, file_patch := range patch.FilePatches() {
from, to := file_patch.Files()
if from == nil {
from = fake_diff_file_null
}
if to == nil {
to = fake_diff_file_null
}
chunks := []usable_chunk{}
for _, chunk := range file_patch.Chunks() {
content := chunk.Content()
if len(content) > 0 && content[0] == '\n' {
content = "\n" + content
} // Horrible hack to fix how browsers newlines that immediately proceed <pre>
chunks = append(chunks, usable_chunk{
Operation: chunk.Type(),
Content: content,
})
}
usable_file_patch := usable_file_patch{
Chunks: chunks,
From: from,
To: to,
}
usable_file_patches = append(usable_file_patches, usable_file_patch)
}
params["file_patches"] = usable_file_patches
render_template(w, "repo_commit", params)
}
type fake_diff_file struct {
hash plumbing.Hash
mode filemode.FileMode
path string
}
func (f fake_diff_file) Hash() plumbing.Hash {
return f.hash
}
func (f fake_diff_file) Mode() filemode.FileMode {
return f.mode
}
func (f fake_diff_file) Path() string {
return f.path
}
var fake_diff_file_null = fake_diff_file{
hash: plumbing.NewHash("0000000000000000000000000000000000000000"),
mode: misc.First_or_panic(filemode.New("100644")),
path: "",
}
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