From 190f6a58bdc4af80bb0f0db39202815abec74266 Mon Sep 17 00:00:00 2001
From: Developer <dev@bilibili-app.local>
Date: Wed, 11 Mar 2026 14:20:20 +0800
Subject: [PATCH] feat: add videoRows utility for big-card list layout

---
 utils/videoRows.ts | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100644 utils/videoRows.ts

diff --git a/utils/videoRows.ts b/utils/videoRows.ts
new file mode 100644
index 0000000..d110e62
--- /dev/null
+++ b/utils/videoRows.ts
@@ -0,0 +1,38 @@
+import type { VideoItem } from '../services/types';
+
+export interface NormalRow {
+  type: 'pair';
+  left: VideoItem;
+  right: VideoItem | null;
+}
+
+export interface BigRow {
+  type: 'big';
+  item: VideoItem;
+}
+
+export type ListRow = NormalRow | BigRow;
+
+/**
+ * Transform a flat VideoItem array into display rows.
+ * The last item always becomes a full-width BigRow.
+ * All preceding items are grouped into NormalRow pairs.
+ */
+export function toListRows(videos: VideoItem[]): ListRow[] {
+  if (videos.length === 0) return [];
+  if (videos.length === 1) return [{ type: 'big', item: videos[0] }];
+
+  const rows: ListRow[] = [];
+  const body = videos.slice(0, videos.length - 1);
+
+  for (let i = 0; i < body.length; i += 2) {
+    rows.push({
+      type: 'pair',
+      left: body[i],
+      right: body[i + 1] ?? null,
+    });
+  }
+
+  rows.push({ type: 'big', item: videos[videos.length - 1] });
+  return rows;
+}