From 7491c424a00f0824f1d45b33d3b3f55fb0a7c4d8 Mon Sep 17 00:00:00 2001
From: Runxi Yu <me@runxiyu.org>
Date: Tue, 11 Feb 2025 20:50:17 +0800
Subject: repo_commit: Show chunks

---
 handle_repo_commit.go           | 22 +++++++++++++++++-----
 static/style.css                | 14 +++++++++++++-
 templates/repo_commit.html.tmpl | 19 ++++++++++++++++---
 3 files changed, 46 insertions(+), 9 deletions(-)

diff --git a/handle_repo_commit.go b/handle_repo_commit.go
index c7bdf9f..3a63201 100644
--- a/handle_repo_commit.go
+++ b/handle_repo_commit.go
@@ -4,8 +4,15 @@ import (
 	"net/http"
 
 	"github.com/go-git/go-git/v5/plumbing"
+	"github.com/go-git/go-git/v5/plumbing/format/diff"
 )
 
+type usable_file_patch struct {
+	From   diff.File
+	To     diff.File
+	Chunks []diff.Chunk
+}
+
 func handle_repo_commit(w http.ResponseWriter, r *http.Request) {
 	data := make(map[string]any)
 	// TODO: Sanitize path values
@@ -38,12 +45,17 @@ func handle_repo_commit(w http.ResponseWriter, r *http.Request) {
 	}
 	data["patch"] = patch
 
-	/*
-		for _, file_patch := range patch.FilePatches() {
-			for _, chunk := range file_patch.Chunks() {
-			}
+	usable_file_patches := make([]usable_file_patch, 0)
+	for _, file_patch := range patch.FilePatches() {
+		from, to := file_patch.Files()
+		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 {
diff --git a/static/style.css b/static/style.css
index af5a9b3..e37ad0d 100644
--- a/static/style.css
+++ b/static/style.css
@@ -88,7 +88,7 @@ td#readme > *:first-child {
 .commit-id {
 	font-family: monospace;
 }
-pre, .scroll {
+.scroll {
 	overflow-x: auto;
 }
 .toggle-table-off, .toggle-table-on {
@@ -112,3 +112,15 @@ pre, .scroll {
 .toggle-table-on:checked + table > tbody {
 	display: table-row-group;
 }
+.chunk-unchanged {
+	color: grey;
+}
+.chunk-addition {
+	color: green;
+}
+.chunk-deletion {
+	color: red;
+}
+.chunk-unknown {
+	color: yellow;
+}
diff --git a/templates/repo_commit.html.tmpl b/templates/repo_commit.html.tmpl
index c480c92..edc4bc3 100644
--- a/templates/repo_commit.html.tmpl
+++ b/templates/repo_commit.html.tmpl
@@ -42,9 +42,22 @@
 			</table>
 		</div>
 		<div class="padding-wrapper scroll">
-			<pre>{{ .patch }}</pre>
-			<p>
-			</p>
+			{{ range .file_patches }}
+				<div class="file-patch">
+					{{ .From.Path }} {{ .From.Mode }} &rarr; {{ .To.Path }} {{ .To.Mode }}
+					{{ range .Chunks }}
+						{{ if eq .Type 0 }}
+							<pre class="chunk chunk-unchanged">{{ .Content }}</pre>
+						{{ else if eq .Type 1 }}
+							<pre class="chunk chunk-addition">{{ .Content }}</pre>
+						{{ else if eq .Type 2 }}
+							<pre class="chunk chunk-deletion">{{ .Content }}</pre>
+						{{ else }}
+							<pre class="chunk chunk-unknown">{{ .Content }}</pre>
+						{{ end }}
+					{{ end }}
+				</div>
+			{{ end }}
 		</div>
 		<footer>
 			{{ template "footer" . }}
-- 
cgit v1.2.3