Файл: framework/forms/gridfield/GridFieldSortableHeader.php
Строк: 267
<?php
/**
* GridFieldSortableHeader adds column headers to a {@link GridField} that can
* also sort the columns.
*
* @see GridField
*
* @package forms
* @subpackage fields-gridfield
*/
class GridFieldSortableHeader implements GridField_HTMLProvider, GridField_DataManipulator, GridField_ActionProvider {
/**
* See {@link setThrowExceptionOnBadDataType()}
*/
protected $throwExceptionOnBadDataType = true;
/**
* @var array
*/
public $fieldSorting = array();
/**
* Determine what happens when this component is used with a list that isn't {@link SS_Filterable}.
*
* - true: An exception is thrown
* - false: This component will be ignored - it won't make any changes to the GridField.
*
* By default, this is set to true so that it's clearer what's happening, but the predefined
* {@link GridFieldConfig} subclasses set this to false for flexibility.
*/
public function setThrowExceptionOnBadDataType($throwExceptionOnBadDataType) {
$this->throwExceptionOnBadDataType = $throwExceptionOnBadDataType;
}
/**
* See {@link setThrowExceptionOnBadDataType()}
*/
public function getThrowExceptionOnBadDataType() {
return $this->throwExceptionOnBadDataType;
}
/**
* Check that this dataList is of the right data type.
* Returns false if it's a bad data type, and if appropriate, throws an exception.
*/
protected function checkDataType($dataList) {
if($dataList instanceof SS_Sortable) {
return true;
} else {
if($this->throwExceptionOnBadDataType) {
throw new LogicException(
get_class($this) . " expects an SS_Sortable list to be passed to the GridField.");
}
return false;
}
}
/**
* Specify sortings with fieldname as the key, and actual fieldname to sort as value.
* Example: array("MyCustomTitle"=>"Title", "MyCustomBooleanField" => "ActualBooleanField")
*
* @param array $casting
*/
public function setFieldSorting($sorting) {
$this->fieldSorting = $sorting;
return $this;
}
/**
* @return array
*/
public function getFieldSorting() {
return $this->fieldSorting;
}
/**
* Returns the header row providing titles with sort buttons
*/
public function getHTMLFragments($gridField) {
if(!$this->checkDataType($gridField->getList())) return;
$forTemplate = new ArrayData(array());
$forTemplate->Fields = new ArrayList;
$state = $gridField->State->GridFieldSortableHeader;
$columns = $gridField->getColumns();
$currentColumn = 0;
$list = $gridField->getList();
foreach($columns as $columnField) {
$currentColumn++;
$metadata = $gridField->getColumnMetadata($columnField);
$fieldName = str_replace('.', '-', $columnField);
$title = $metadata['title'];
if(isset($this->fieldSorting[$columnField]) && $this->fieldSorting[$columnField]) {
$columnField = $this->fieldSorting[$columnField];
}
$allowSort = ($title && $list->canSortBy($columnField));
if(!$allowSort && strpos($columnField, '.') !== false) {
// we have a relation column with dot notation
// @see DataObject::relField for approximation
$parts = explode('.', $columnField);
$tmpItem = singleton($list->dataClass());
for($idx = 0; $idx < sizeof($parts); $idx++) {
$methodName = $parts[$idx];
if($tmpItem instanceof SS_List) {
// It's impossible to sort on a HasManyList/ManyManyList
break;
} elseif(method_exists($tmpItem, 'hasMethod') && $tmpItem->hasMethod($methodName)) {
// The part is a relation name, so get the object/list from it
$tmpItem = $tmpItem->$methodName();
} elseif($tmpItem instanceof DataObject && $tmpItem->hasDatabaseField($methodName)) {
// Else, if we've found a database field at the end of the chain, we can sort on it.
// If a method is applied further to this field (E.g. 'Cost.Currency') then don't try to sort.
$allowSort = $idx === sizeof($parts) - 1;
break;
} else {
// If neither method nor field, then unable to sort
break;
}
}
}
if($allowSort) {
$dir = 'asc';
if($state->SortColumn(null) == $columnField && $state->SortDirection('asc') == 'asc') {
$dir = 'desc';
}
$field = Object::create(
'GridField_FormAction', $gridField, 'SetOrder'.$fieldName, $title,
"sort$dir", array('SortColumn' => $columnField)
)->addExtraClass('ss-gridfield-sort');
if($state->SortColumn(null) == $columnField){
$field->addExtraClass('ss-gridfield-sorted');
if($state->SortDirection('asc') == 'asc')
$field->addExtraClass('ss-gridfield-sorted-asc');
else
$field->addExtraClass('ss-gridfield-sorted-desc');
}
} else {
if($currentColumn == count($columns)
&& $gridField->getConfig()->getComponentByType('GridFieldFilterHeader')){
$field = new LiteralField($fieldName,
'<button type="button" name="showFilter" class="ss-gridfield-button-filter trigger"></button>');
} else {
$field = new LiteralField($fieldName, '<span class="non-sortable">' . $title . '</span>');
}
}
$forTemplate->Fields->push($field);
}
return array(
'header' => $forTemplate->renderWith('GridFieldSortableHeader_Row'),
);
}
/**
*
* @param GridField $gridField
* @return array
*/
public function getActions($gridField) {
if(!$this->checkDataType($gridField->getList())) return;
return array('sortasc', 'sortdesc');
}
public function handleAction(GridField $gridField, $actionName, $arguments, $data) {
if(!$this->checkDataType($gridField->getList())) return;
$state = $gridField->State->GridFieldSortableHeader;
switch($actionName) {
case 'sortasc':
$state->SortColumn = $arguments['SortColumn'];
$state->SortDirection = 'asc';
break;
case 'sortdesc':
$state->SortColumn = $arguments['SortColumn'];
$state->SortDirection = 'desc';
break;
}
}
/**
* Returns the manipulated (sorted) DataList. Field names will simply add an
* 'ORDER BY' clause, relation names will add appropriate joins to the
* {@link DataQuery} first.
*
* @param GridField
* @param SS_List
* @return SS_List
*/
public function getManipulatedData(GridField $gridField, SS_List $dataList) {
if(!$this->checkDataType($dataList)) return $dataList;
$state = $gridField->State->GridFieldSortableHeader;
if ($state->SortColumn == "") {
return $dataList;
}
$column = $state->SortColumn;
// if we have a relation column with dot notation
if(strpos($column, '.') !== false) {
$lastAlias = $dataList->dataClass();
$tmpItem = singleton($lastAlias);
$parts = explode('.', $state->SortColumn);
for($idx = 0; $idx < sizeof($parts); $idx++) {
$methodName = $parts[$idx];
// If we're not on the last item, we're looking at a relation
if($idx !== sizeof($parts) - 1) {
// Traverse to the relational list
$tmpItem = $tmpItem->$methodName();
$joinClass = ClassInfo::table_for_object_field(
$lastAlias,
$methodName . "ID"
);
// if the field isn't in the object tree then it is likely
// been aliased. In that event, assume what the user has
// provided is the correct value
if(!$joinClass) $joinClass = $lastAlias;
$dataList = $dataList->leftJoin(
$tmpItem->class,
'"' . $methodName . '"."ID" = "' . $joinClass . '"."' . $methodName . 'ID"',
$methodName
);
// Store the last 'alias' name as it'll be used for the next
// join, or the 'sort' column
$lastAlias = $methodName;
} else {
// Change relation.relation.fieldname to alias.fieldname
$column = $lastAlias . '.' . $methodName;
}
}
}
// We need to manually create our ORDER BY "Foo"."Bar" string for relations,
// as ->sort() won't do it by itself. Blame PostgreSQL for making this necessary
$pieces = explode('.', $column);
$column = '"' . implode('"."', $pieces) . '"';
return $dataList->sort($column, $state->SortDirection('asc'));
}
}