1 files changed, 112 insertions, 0 deletions
diff --git a/http_handle_repo_commit.go b/http_handle_repo_commit.go
new file mode 100644
index 0000000..d79b088
--- /dev/null
+++ b/http_handle_repo_commit.go
@@ -0,0 +1,112 @@
+package main
+
+import (
+	"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 []diff.Chunk
+}
+
+func handle_repo_commit(w http.ResponseWriter, r *http.Request, params map[string]string) {
+	data := make(map[string]any)
+	data["global"] = global_data
+	group_name, repo_name, commit_id_specified_string := params["group_name"], params["repo_name"], params["commit_id"]
+	data["group_name"], data["repo_name"] = group_name, repo_name
+	repo, err := open_git_repo(r.Context(), group_name, repo_name)
+	if err != nil {
+		_, _ = w.Write([]byte("Error opening repo: " + err.Error()))
+		return
+	}
+	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 {
+		_, _ = w.Write([]byte("Error getting commit object: " + err.Error()))
+		return
+	}
+	if commit_id_specified_string_without_suffix != commit_id_specified_string {
+		patch, err := format_patch_from_commit(commit_object)
+		if err != nil {
+			_, _ = w.Write([]byte("Error formatting patch: " + err.Error()))
+			return
+		}
+		_, _ = w.Write([]byte(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
+	}
+
+	data["commit_object"] = commit_object
+	data["commit_id"] = commit_id_string
+
+	parent_commit_hash, patch, err := get_patch_from_commit(commit_object)
+	if err != nil {
+		_, _ = w.Write([]byte("Error getting patch from commit: " + err.Error()))
+		return
+	}
+	data["parent_commit_hash"] = parent_commit_hash.String()
+	data["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
+		}
+		usable_file_patch := usable_file_patch{
+			Chunks: file_patch.Chunks(),
+			From:   from,
+			To:     to,
+		}
+		usable_file_patches = append(usable_file_patches, usable_file_patch)
+	}
+	data["file_patches"] = usable_file_patches
+
+	err = templates.ExecuteTemplate(w, "repo_commit", data)
+	if err != nil {
+		_, _ = w.Write([]byte("Error rendering template: " + err.Error()))
+		return
+	}
+}
+
+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("e69de29bb2d1d6434b8b29ae775ad8c2e48c5391"),
+	mode: misc.First_or_panic(filemode.New("100644")),
+	path: "",
+}