From cd1d16fc7f9f6ca964141a6eb7edfc96b9298e2f Mon Sep 17 00:00:00 2001
From: hailin <hailin.zhao@gdzx.xyz>
Date: Fri, 6 Feb 2026 00:22:04 -0800
Subject: [PATCH] =?UTF-8?q?feat(admin-web):=20=E6=89=B9=E9=87=8F=E4=B8=8B?=
 =?UTF-8?q?=E8=BD=BD=E6=94=AF=E6=8C=81=E6=96=AD=E7=82=B9=E7=BB=AD=E4=BC=A0?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

- 下载前检查文件是否已存在
- 已存在的文件自动跳过
- 显示跳过数量和新下载数量

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
---
 .../src/app/(dashboard)/contracts/page.tsx    | 44 +++++++++++++++++--
 1 file changed, 40 insertions(+), 4 deletions(-)

diff --git a/frontend/admin-web/src/app/(dashboard)/contracts/page.tsx b/frontend/admin-web/src/app/(dashboard)/contracts/page.tsx
index 48eb043d..80dadf96 100644
--- a/frontend/admin-web/src/app/(dashboard)/contracts/page.tsx
+++ b/frontend/admin-web/src/app/(dashboard)/contracts/page.tsx
@@ -224,13 +224,27 @@ export default function ContractsPage() {
 
       toast.info(`开始下载 ${total} 份合同...`);
 
-      // 第三步：逐个下载合同到用户选择的目录
+      // 第三步：逐个下载合同到用户选择的目录（支持断点续传）
       let downloaded = 0;
+      let skipped = 0;
       for (const contract of contracts) {
         try {
           // 生成文件名
           const fileName = `${contract.contractNo}_${contract.userRealName || '未实名'}_${contract.treeCount}棵.pdf`;
 
+          // 检查文件是否已存在（断点续传）
+          try {
+            await dirHandle.getFileHandle(fileName, { create: false });
+            // 文件已存在，跳过
+            skipped++;
+            downloaded++;
+            setDownloadedCount(downloaded);
+            setDownloadProgress(Math.round((downloaded / total) * 100));
+            continue;
+          } catch {
+            // 文件不存在，继续下载
+          }
+
           // 下载 PDF
           const downloadUrl = contractService.getDownloadUrl(contract.orderNo);
           const response = await fetch(downloadUrl);
@@ -255,7 +269,11 @@ export default function ContractsPage() {
         }
       }
 
-      toast.success(`下载完成！成功 ${downloaded}/${total} 份`);
+      if (skipped > 0) {
+        toast.success(`下载完成！新下载 ${downloaded - skipped} 份，跳过已存在 ${skipped} 份`);
+      } else {
+        toast.success(`下载完成！成功 ${downloaded}/${total} 份`);
+      }
 
       // 保存当前时间作为最后下载时间
       const now = new Date().toISOString();
@@ -327,11 +345,25 @@ export default function ContractsPage() {
 
       toast.info(`开始下载 ${total} 份新增合同...`);
 
-      // 第三步：逐个下载合同
+      // 第三步：逐个下载合同（支持断点续传）
       let downloaded = 0;
+      let skipped = 0;
       for (const contract of contracts) {
         try {
           const fileName = `${contract.contractNo}_${contract.userRealName || '未实名'}_${contract.treeCount}棵.pdf`;
+
+          // 检查文件是否已存在（断点续传）
+          try {
+            await dirHandle.getFileHandle(fileName, { create: false });
+            skipped++;
+            downloaded++;
+            setDownloadedCount(downloaded);
+            setDownloadProgress(Math.round((downloaded / total) * 100));
+            continue;
+          } catch {
+            // 文件不存在，继续下载
+          }
+
           const downloadUrl = contractService.getDownloadUrl(contract.orderNo);
           const response = await fetch(downloadUrl);
           if (!response.ok) continue;
@@ -350,7 +382,11 @@ export default function ContractsPage() {
         }
       }
 
-      toast.success(`下载完成！成功 ${downloaded}/${total} 份`);
+      if (skipped > 0) {
+        toast.success(`下载完成！新下载 ${downloaded - skipped} 份，跳过已存在 ${skipped} 份`);
+      } else {
+        toast.success(`下载完成！成功 ${downloaded}/${total} 份`);
+      }
 
       // 更新最后下载时间
       const now = new Date().toISOString();