silverstripe-reports/code/SS_ReportWrapper.php

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<?php
namespace SilverStripe\Reports;
/**
* SS_ReportWrapper is a base class for creating report wappers.
*
* Wrappers encapsulate an existing report to alter their behaviour - they are implementations of
* the standard GoF decorator pattern.
*
* This base class ensure that, by default, wrappers behave in the same way as the report that is
* being wrapped. You should override any methods that need to behave differently in your subclass
* of SS_ReportWrapper.
*
* It also makes calls to 2 empty methods that you can override {@link beforeQuery()} and
* {@link afterQuery()}
*/
abstract class SS_ReportWrapper extends SS_Report
{
protected $baseReport;
public function __construct($baseReport)
{
$this->baseReport = is_string($baseReport) ? new $baseReport : $baseReport;
$this->dataClass = $this->baseReport->dataClass();
parent::__construct();
}
public function ID()
{
return get_class($this->baseReport) . '_' . get_class($this);
}
///////////////////////////////////////////////////////////////////////////////////////////
// Filtering
public function parameterFields()
{
return $this->baseReport->parameterFields();
}
///////////////////////////////////////////////////////////////////////////////////////////
// Columns
public function columns()
{
return $this->baseReport->columns();
}
///////////////////////////////////////////////////////////////////////////////////////////
// Querying
/**
* Override this method to perform some actions prior to querying.
*/
public function beforeQuery($params)
{
}
/**
* Override this method to perform some actions after querying.
*/
public function afterQuery()
{
}
public function sourceQuery($params)
{
if ($this->baseReport->hasMethod('sourceRecords')) {
// The default implementation will create a fake query from our sourceRecords() method
return parent::sourceQuery($params);
} elseif ($this->baseReport->hasMethod('sourceQuery')) {
$this->beforeQuery($params);
$query = $this->baseReport->sourceQuery($params);
$this->afterQuery();
return $query;
} else {
user_error("Please override sourceQuery()/sourceRecords() and columns() in your base report", E_USER_ERROR);
}
}
public function sourceRecords($params = array(), $sort = null, $limit = null)
{
$this->beforeQuery($params);
$records = $this->baseReport->sourceRecords($params, $sort, $limit);
$this->afterQuery();
return $records;
}
///////////////////////////////////////////////////////////////////////////////////////////
// Pass-through
public function title()
{
return $this->baseReport->title();
}
public function group()
{
/** @skipUpgrade */
return $this->baseReport->hasMethod('group') ? $this->baseReport->group() : 'Group';
}
public function sort()
{
return $this->baseReport->hasMethod('sort') ? $this->baseReport->sort() : 0;
}
public function description()
{
return $this->baseReport->description();
}
public function canView($member = null)
{
return $this->baseReport->canView($member);
}
}