增加每日推送的导出和排序

app/admin/controller/mall/DailyPush.php

@@ -4,6 +4,7 @@ namespace app\admin\controller\mall;
 
 use Throwable;
 use app\common\library\MallDailyPushBackfill;
+use app\common\library\MallDailyPushExport;
 use app\common\controller\Backend;
 use support\Response;
 use Webman\Http\Request;
@@ -35,6 +36,11 @@ class DailyPush extends Backend
         'create_time',
     ];
 
+    /**
+     * exportCount 与 export 共用导出权限
+     */
+    protected array $noNeedPermission = ['exportCount'];
+
     public function initialize(): void
     {
         parent::initialize();
@@ -59,6 +65,73 @@ class DailyPush extends Backend
         return $this->_index();
     }
 
+    /**
+     * 导出筛选结果条数预览
+     */
+    public function exportCount(Request $request): Response
+    {
+        $response = $this->initializeBackend($request);
+        if ($response !== null) {
+            return $response;
+        }
+
+        if (!$this->auth->check('mall/dailyPush/export')) {
+            return $this->error(__('You have no permission'), [], 401);
+        }
+
+        try {
+            [$where, $alias] = $this->buildExportQueryParts();
+            $count = $this->model->alias($alias)->where($where)->count();
+            $exporter = new MallDailyPushExport();
+            return $this->success('', [
+                'count'     => $count,
+                'max_limit' => $exporter->getMaxExportLimit(),
+            ]);
+        } catch (Throwable $e) {
+            return $this->error($e->getMessage());
+        }
+    }
+
+    /**
+     * 导出 Excel（CSV 流式写入，兼容 Excel 打开）
+     */
+    public function export(Request $request): Response
+    {
+        $response = $this->initializeBackend($request);
+        if ($response !== null) {
+            return $response;
+        }
+
+        $fieldsRaw = $request->post('fields', $request->get('fields', []));
+        $fields = is_array($fieldsRaw) ? $fieldsRaw : explode(',', strval($fieldsRaw));
+        $limitRaw = strval($request->post('export_limit', $request->get('export_limit', '1000')));
+        if (!is_numeric($limitRaw)) {
+            return $this->error(__('Parameter error'));
+        }
+        $limit = intval($limitRaw);
+        if ($limit < 1) {
+            return $this->error(__('Parameter error'));
+        }
+
+        try {
+            [$where, $alias, $order] = $this->buildExportQueryParts();
+            $lang = strval($request->header('think-lang', 'zh-cn'));
+            $exporter = new MallDailyPushExport();
+            return $exporter->export($this->model, $where, $alias, $order, $fields, $limit, $lang);
+        } catch (Throwable $e) {
+            return $this->error($e->getMessage());
+        }
+    }
+
+    /**
+     * @return array{0: array, 1: array, 2: array}
+     */
+    private function buildExportQueryParts(): array
+    {
+        [$where, $alias, , $order] = $this->queryBuilder();
+        return [$where, $alias, $order];
+    }
+
     /**
      * 按历史 mall_daily_push 记录回补用户信息
      */