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<?php |
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/** |
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* Class HasOneSelectorField provides CMS field to manage selecting/adding/editing object within |
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* has_one relation of the current object being edited |
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*/ |
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class HasOneSelectorField extends GridField |
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{ |
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/** |
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* Name of the list data class |
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* |
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* @var string |
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*/ |
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protected $dataClass; |
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/** |
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* Instance of data object that contains the has one relation |
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* |
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* @var DataObject |
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*/ |
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protected $owner; |
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/** |
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* Text to display when no record selected |
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* |
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* @var string |
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*/ |
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protected $emptyString = 'No item selected'; |
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/** |
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* HasOneSelectorField constructor. |
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* @param string $name |
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* @param string|null $title |
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* @param DataObject $owner |
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* @param string $dataClass |
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*/ |
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public function __construct($name, $title = null, DataObject $owner, $dataClass = DataObject::class) |
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{ |
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// Include styles |
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Requirements::css('hasoneselector/client/styles/hasoneselector.css'); |
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// Initiate grid field configuration based on relation editor |
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$config = GridFieldConfig_RelationEditor::create(); |
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$config->removeComponentsByType('GridFieldToolbarHeader'); |
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$config->removeComponentsByType('GridFieldSortableHeader'); |
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$config->removeComponentsByType('GridFieldFilterHeader'); |
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$config->removeComponentsByType('GridFieldPageCount'); |
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$config->removeComponentsByType('GridFieldPaginator'); |
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// Set the data class of the list |
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$this->setDataClass($dataClass); |
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// Set the owner data object that contains the has one relation |
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$this->setOwner($owner); |
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// Instance of data list that manages the grid field data |
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$dataList = HasOneSelectorDataList::create($this); |
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// Set empty string based on the data class |
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$this->setEmptyString(sprintf('No %s selected', strtolower(singleton($dataClass)->singular_name()))); |
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parent::__construct($name . 'ID', $title, $dataList, $config); |
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} |
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/** |
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* Set empty string when no record selected |
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* |
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* @param string $string |
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* @return $this |
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*/ |
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public function setEmptyString($string) |
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{ |
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$this->emptyString = $string; |
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return $this; |
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} |
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/** |
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* set the name of the data class for current list |
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* |
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* @param string $class |
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* @return $this |
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*/ |
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public function setDataClass($class) |
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{ |
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$this->dataClass = $class; |
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return $this; |
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} |
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/** |
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* Get the name of the data class for current list |
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* |
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* @return string |
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*/ |
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public function getDataClass() |
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{ |
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return $this->dataClass; |
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} |
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/** |
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* Get the record of the has one relation for current owner object |
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* |
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* @return DataObject|null |
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* @throws Exception |
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*/ |
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public function getRecord() |
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{ |
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return $this->getOwner()->{rtrim($this->getName(), 'ID')}(); |
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} |
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/** |
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* Set the record of the has one relation for current owner object |
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* |
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* @param DataObject|null $object |
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* @return void |
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* @throws ValidationException |
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*/ |
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public function setRecord($object) |
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{ |
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$owner = $this->getOwner(); |
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$recordName = $this->getName(); |
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$owner->{$recordName} = is_null($object) ? 0 : $object->ID; |
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$owner->write(); |
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} |
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/** |
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* Set instance of data object that has the has one relation |
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* |
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* @param DataObject $owner |
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* @return $this |
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*/ |
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public function setOwner(DataObject $owner) |
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{ |
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$this->owner = $owner; |
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return $this; |
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} |
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/** |
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* Get instance of data object that has the has one relation |
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* |
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* @return DataObject |
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*/ |
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public function getOwner() |
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{ |
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return $this->owner; |
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} |
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/** |
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* Get the data source. |
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* |
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* @return SS_List |
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*/ |
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public function getList() |
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{ |
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// Get current record ID |
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$id = (int) $this->getOwner()->{$this->getName()}; |
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// Filter current list to display current record (has one) value |
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return $this->list->filter('ID', $id); |
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} |
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/** |
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* Get the data source after applying every {@link GridField_DataManipulator} to it. |
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* |
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* @return SS_List |
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*/ |
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public function getManipulatedList() |
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{ |
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// Call manipulation from parent class to update current record (has one) |
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parent::getManipulatedList(); |
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// Get list of data based on new record |
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return $this->getList(); |
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} |
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/** |
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* @param array $content |
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* @return string |
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*/ |
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protected function getOptionalTableBody(array $content) |
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{ |
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// Text used by grid field for no items |
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$noItemsText = _t('GridField.NoItemsFound', 'No items found'); |
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// If we have no items text in the body, then replace the text with customised string |
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if (strpos($content['body'], $noItemsText) !== false) { |
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$content['body'] = str_replace($noItemsText, $this->emptyString, $content['body']); |
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} |
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return parent::getOptionalTableBody($content); |
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} |
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} |
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