Re-migrate code

services/companies_service.go

@@ -110,3 +110,40 @@ func (s *CompaniesService) Delete(companyName string) error {
 
 	return nil
 }
+
+// GetStatsOverview 获取企业统计概览
+func (s *CompaniesService) GetStatsOverview() (*models.CompanyStatsOverviewDTO, error) {
+	stats := &models.CompanyStatsOverviewDTO{}
+
+	if err := database.DB.Model(&models.Company{}).Count(&stats.TotalCompanies).Error; err != nil {
+		return nil, errors.New("统计企业总数失败")
+	}
+
+	if err := database.DB.Model(&models.Company{}).Where("is_active = ?", true).Count(&stats.ActiveCompanies).Error; err != nil {
+		return nil, errors.New("统计启用企业数量失败")
+	}
+
+	stats.InactiveCompanies = stats.TotalCompanies - stats.ActiveCompanies
+
+	if err := database.DB.Model(&models.Serial{}).Count(&stats.TotalSerials).Error; err != nil {
+		return nil, errors.New("统计企业赋码总数失败")
+	}
+
+	if err := database.DB.Model(&models.Serial{}).Where("is_active = ?", true).Count(&stats.ActiveSerials).Error; err != nil {
+		return nil, errors.New("统计有效企业赋码数量失败")
+	}
+
+	stats.RevokedSerials = stats.TotalSerials - stats.ActiveSerials
+
+	if err := database.DB.Model(&models.EmployeeSerial{}).Count(&stats.TotalEmployeeSerials).Error; err != nil {
+		return nil, errors.New("统计员工赋码总数失败")
+	}
+
+	if err := database.DB.Model(&models.EmployeeSerial{}).Where("is_active = ?", true).Count(&stats.ActiveEmployeeSerials).Error; err != nil {
+		return nil, errors.New("统计有效员工赋码数量失败")
+	}
+
+	stats.RevokedEmployeeSerials = stats.TotalEmployeeSerials - stats.ActiveEmployeeSerials
+
+	return stats, nil
+}