我正在为MVC应用程序(Kohana / PHP)编写 CSV / Excel - > MySQL导入管理器。
我有一个名为“ImportManager”的控制器,它有一个名为“index”的操作(默认),它在网格中显示所有有效的.csv
和.xls
文件在特定目录中并准备导入。然后,用户可以选择要导入的文件。
但是,由于.csv
个文件导入一个数据库表,而.xls
个文件导入多个数据库表,我需要处理此抽象即可。因此,我创建了一个名为SmartImportFile
的帮助类,我将每个文件发送到.csv
或.xls
,然后我会问这个“智能”对象将该文件中的工作表(是一个或多个)添加到我的集合中。这是我在PHP代码中的动作方法:
public function action_index()
{
$view = new View('backend/application/importmanager');
$smart_worksheets = array();
$raw_files = glob('/data/import/*.*');
if (count($raw_files) > 0)
{
foreach ($raw_files as $raw_file)
{
$smart_import_file = new Backend_Application_Smartimportfile($raw_file);
$smart_worksheets = $smart_import_file->add_smart_worksheets_to($smart_worksheets);
}
}
$view->set('smart_worksheets', $smart_worksheets);
$this->request->response = $view;
}
SmartImportFile类如下所示:
class Backend_Application_Smartimportfile
{
protected $file_name;
protected $file_extension;
protected $file_size;
protected $when_file_copied;
protected $file_name_without_extension;
protected $path_info;
protected $current_smart_worksheet = array();
protected $smart_worksheets = array();
public function __construct($file_name)
{
$this->file_name = $file_name;
$this->file_name_without_extension = current(explode('.', basename($this->file_name)));
$this->path_info = pathinfo($this->file_name);
$this->when_file_copied = date('Y-m-d H:i:s', filectime($this->file_name));
$this->file_extension = strtolower($this->path_info['extension']);
$this->file_extension = strtolower(pathinfo($this->file_name, PATHINFO_EXTENSION));
if(in_array($this->file_extension, array('csv','xls','xlsx')))
{
$this->current_smart_worksheet = array();
$this->process_file();
}
}
private function process_file()
{
$this->file_size = filesize($this->file_name);
if(in_array($this->file_extension, array('xls','xlsx')))
{
if($this->file_size < 4000000)
{
$this->process_all_worksheets_of_excel_file();
}
}
else if($this->file_extension == 'csv')
{
$this->process_csv_file();
}
}
private function process_all_worksheets_of_excel_file()
{
$worksheet_names = Import_Driver_Excel::get_worksheet_names_as_array($this->file_name);
if (count($worksheet_names) > 0)
{
foreach ($worksheet_names as $worksheet_name)
{
$this->current_smart_worksheet['name'] = basename($this->file_name).' ('.$worksheet_name.')';
$this->current_smart_worksheet['kind'] = strtoupper($this->file_extension);
$this->current_smart_worksheet['file_size'] = $this->file_size;
$this->current_smart_worksheet['when_file_copied'] = $this->when_file_copied;
$this->current_smart_worksheet['table_name'] = $this->file_name_without_extension.'__'.$worksheet_name;
$this->assign_database_table_fields();
$this->smart_worksheets[] = $this->current_smart_worksheet;
}
}
}
private function process_csv_file()
{
$this->current_smart_worksheet['name'] = basename($this->file_name);
$this->current_smart_worksheet['kind'] = strtoupper($this->file_extension);
$this->current_smart_worksheet['file_size'] = $this->file_size;
$this->current_smart_worksheet['when_file_copied'] = $this->when_file_copied;
$this->current_smart_worksheet['table_name'] = $this->file_name_without_extension;
$this->assign_database_table_fields();
$this->smart_worksheets[] = $this->current_smart_worksheet;
}
private function assign_database_table_fields()
{
$db = Database::instance('import_excel');
$sql = "SHOW TABLE STATUS WHERE name = '".$this->current_smart_worksheet['table_name']."'";
$result = $db->query(Database::SELECT, $sql, FALSE)->as_array();
if(count($result))
{
$when_table_created = $result[0]['Create_time'];
$when_file_copied_as_date = strtotime($this->when_file_copied);
$when_table_created_as_date = strtotime($when_table_created);
if($when_file_copied_as_date > $when_table_created_as_date)
{
$this->current_smart_worksheet['status'] = 'backend.application.import.status.needtoreimport';
}
else
{
$this->current_smart_worksheet['status'] = 'backend.application.import.status.isuptodate';
}
$this->current_smart_worksheet['when_table_created'] = $when_table_created;
}
else
{
$this->current_smart_worksheet['when_table_created'] = 'backend.application.import.status.tabledoesnotexist';
$this->current_smart_worksheet['status'] = 'backend.application.import.status.needtoimport';
}
}
public function add_smart_worksheets_to(Array $smart_worksheets = array())
{
return array_merge($smart_worksheets, $this->get_smart_worksheets());
}
public function get_smart_worksheets()
{
if ( ! is_array($this->smart_worksheets))
{
return array();
}
return $this->smart_worksheets;
}
}
在代码审核中,我被告知可能更好没有像这样的帮助类,但要保留控制器操作方法中的大部分代码本身。论证是你应该能够查看控制器动作中的代码并查看它的作用,而不是让它本身调用外部辅助类。 我不同意。我的论证是:
根据您在MVC模式中编程的经验,是否应将上述辅助类重构为控制器?
答案 0 :(得分:2)
控制器有两种方法:使其变薄或变厚。当我开始使用MVC进行冒险时,我犯了一个创建厚控制器的错误 - 现在我更喜欢尽可能地让它变薄。在我看来,你的解决方案很好。
以下是我将如何进一步重新设计代码的方法:
class Backend_Application_SmartImport {
public function __construct( $raw_files ) {
}
public function process() {
foreach ($raw_files as $raw_file) {
// (...)
$oSmartImportFileInstance = $this->getSmartImportFileInstance( $smart_import_file_extension );
}
}
protected function getSmartImportFileInstance( $smart_import_file_extension ) {
switch ( $smart_import_file_extension ) {
case 'xml':
return new Backend_Application_SmartImportFileXml();
// (...)
}
}
}
abstract class Backend_Application_SmartImportFile {
// common methods for importing from xml or cvs
abstract function process();
}
class Backend_Application_SmartImportFileCVS extends Backend_Application_SmartImportFile {
// methods specified for cvs importing
}
class Backend_Application_SmartImportFileXls extends Backend_Application_SmartImportFile {
// methods specified for xls importing
}
这个想法是让两个类负责处理从基类继承的xml和cvs。主类使用特殊方法来检测数据的处理方式(Strategy Pattern)。控制器只是将文件列表传递给Backend_Application_SmartImport类的实例,并将流程方法的结果传递给视图。
我的解决方案的优点是代码更加分离,您可以轻松,干净地添加新类型的处理,如xml,pdf等。
答案 1 :(得分:1)
我同意你的看法。
您的ImportController
执行控制器的目的。它生成用户要查看和操作的文件列表,然后将该列表传递给View以显示它。我假设你有一个process
动作或类似动作,当用户选择了一个文件时,它会处理请求,然后将这个文件传递给有问题的Helper。
Helper是抽象的完美范例,在使用和存在方面完全合理。无论如何它都不与Controller耦合,也不需要。 Helper可以很容易地用在Controller不存在的其他场景中,例如CRON任务,用户可以在没有ImportController
的情况下以编程方式调用的公共API。
这个球的权利。坚持下去吧!