关键词抓取

backend/app/controller/UsedCarController.php

@@ -187,6 +187,27 @@ class UsedCarController extends BaseController
         }
     }
 
+    /**
+     * 关键词搜索懂车帝车型数据
+     */
+    public function crawlKeyword(Request $request): Response
+    {
+        $this->requireAuth($request);
+        $keyword = $request->post('keyword') ?: $request->get('keyword');
+
+        if (empty($keyword)) {
+            return $this->error('关键词不能为空');
+        }
+
+        try {
+            $crawlService = new \app\Service\UsedCarCrawlService();
+            $data = $crawlService->searchByKeyword($keyword);
+            return $this->success($data);
+        } catch (\Exception $e) {
+            return $this->error($e->getMessage());
+        }
+    }
+
     /**
      * 生成PDF
      */

backend/app/service/UsedCarCrawlService.php

@@ -521,4 +521,140 @@ class UsedCarCrawlService
 
         return $result;
     }
+
+    /**
+     * 通过关键词搜索懂车帝车系信息
+     *
+     * @param string $keyword 搜索关键词（如 "奥迪A4"）
+     * @return array 品牌和车系信息
+     * @throws \Exception
+     */
+    public function searchByKeyword(string $keyword): array
+    {
+        // 访问懂车帝搜索页面获取第一个结果的链接
+        $searchUrl = "https://www.dongchedi.com/search?keyword=" . urlencode($keyword);
+
+        try {
+            $html = $this->fetchHtml($searchUrl);
+            $ql = QueryList::html($html);
+
+            // 查找"查看全部"按钮的链接
+            $href = '';
+            $ql->find('a.fold-btn')->each(function ($item) use (&$href) {
+                $itemHref = $item->attr('href');
+                if ($itemHref) {
+                    $href = $itemHref;
+                }
+            });
+
+            if (empty($href)) {
+                throw new \Exception('未找到相关车系，请使用更精确的关键词');
+            }
+
+            // 提取车系ID
+            $seriesId = $this->extractSeriesId($href);
+            if (!$seriesId) {
+                throw new \Exception('无法解析车系ID');
+            }
+
+            // 获取品牌和车系信息
+            return $this->getBrandSeries($seriesId);
+        } catch (\Exception $e) {
+            throw new \Exception('搜索失败: ' . $e->getMessage());
+        }
+    }
+
+    /**
+     * 获取品牌和车系名称
+     *
+     * @param string $seriesId 车系ID
+     * @return array 包含品牌和车系信息的数组
+     * @throws \Exception
+     */
+    public function getBrandSeries(string $seriesId): array
+    {
+        $url = "https://www.dongchedi.com/auto/series/" . $seriesId . "?anchorId=carModels";
+
+        try {
+            $html = $this->fetchHtml($url);
+            $ql = QueryList::html($html);
+
+            // 从面包屑导航中提取品牌和车系
+            $breadcrumbs = [];
+            $ql->find('div.breadcrumb_wrap__2GLeU span')->each(function ($item) use (&$breadcrumbs) {
+                $breadcrumbs[] = trim($item->text());
+            });
+
+            $brand = $breadcrumbs[2] ?? '';
+            $series = $breadcrumbs[3] ?? '';
+
+            // 获取车型列表
+            $models = $this->getSeriesModels($seriesId);
+
+            return [
+                'brand' => $brand,
+                'series' => $series,
+                'series_id' => $seriesId,
+                'models' => $models,
+            ];
+        } catch (\Exception $e) {
+            throw new \Exception('获取车系信息失败: ' . $e->getMessage());
+        }
+    }
+
+    /**
+     * 获取车系下的车型列表
+     *
+     * @param string $seriesId 车系ID
+     * @return array 车型列表
+     */
+    public function getSeriesModels(string $seriesId): array
+    {
+        $url = "https://www.dongchedi.com/auto/series/" . $seriesId . "?anchorId=carModels";
+        $models = [];
+
+        try {
+            $html = $this->fetchHtml($url);
+            $ql = QueryList::html($html);
+
+            // 解析车型列表
+            $ql->find('div.carModelsPager__EiwGC a.model-item__1r8j')->each(function ($item) use (&$models) {
+                $modelName = trim($item->text());
+                $modelUrl = $item->attr('href');
+
+                if ($modelName) {
+                    $models[] = [
+                        'name' => $modelName,
+                        'url' => $modelUrl ? 'https://www.dongchedi.com' . $modelUrl : '',
+                    ];
+                }
+            });
+
+            return $models;
+        } catch (\Exception) {
+            // 车型解析失败，返回空数组
+            return [];
+        }
+    }
+
+    /**
+     * 从懂车帝URL中提取车系ID
+     *
+     * @param string $url 懂车帝URL
+     * @return string|null 车系ID
+     */
+    private function extractSeriesId(string $url): ?string
+    {
+        // 匹配 /auto/series/x123/ 格式
+        if (preg_match('/\/auto\/series\/(\d+)/', $url, $matches)) {
+            return $matches[1];
+        }
+
+        // 匹配 /auto/series/x123/params/ 格式
+        if (preg_match('/\/auto\/series\/(\d+)/', $url, $matches)) {
+            return $matches[1];
+        }
+
+        return null;
+    }
 }

backend/config/route.php

@@ -72,6 +72,7 @@ Route::group('/api/v1/usedcar', function () {
     Route::post('/status', [app\controller\UsedCarController::class, 'updateStatus']);
     Route::post('/crawl/url', [app\controller\UsedCarController::class, 'crawlByUrl']);
     Route::post('/crawl/mobile', [app\controller\UsedCarController::class, 'crawlMobileUrl']);
+    Route::post('/crawl/keyword', [app\controller\UsedCarController::class, 'crawlKeyword']);
     Route::post('/pdf/generate', [app\controller\UsedCarController::class, 'generatePdf']);
     Route::get('/pdf/download', [app\controller\UsedCarController::class, 'downloadPdf']);
     Route::get('/pdf/url', [app\controller\UsedCarController::class, 'getPdfUrl']);