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<?php
/**
* @package framework
* @subpackage gridfield
*/
/**
* Adds an "Export list" button to the bottom of a GridField.
*/
class GridFieldExportButton implements GridField_HTMLProvider, GridField_ActionProvider, GridField_URLHandler {
/**
* @var array Map of a property name on the exported objects, with values being the column title in the CSV file.
* Note that titles are only used when {@link $csvHasHeader} is set to TRUE.
*/
protected $exportColumns;
/**
* @var string
*/
protected $csvSeparator = ",";
/**
* @var boolean
*/
protected $csvHasHeader = true;
/**
* Fragment to write the button to
*/
protected $targetFragment;
/**
* @param string $targetFragment The HTML fragment to write the button into
* @param array $exportColumns The columns to include in the export
*/
public function __construct($targetFragment = "after", $exportColumns = null) {
$this->targetFragment = $targetFragment;
$this->exportColumns = $exportColumns;
}
/**
* Place the export button in a <p> tag below the field
*/
public function getHTMLFragments($gridField) {
$button = new GridField_FormAction(
$gridField,
'export',
_t('TableListField.CSVEXPORT', 'Export to CSV'),
'export',
null
);
$button->setAttribute('data-icon', 'download-csv');
$button->addExtraClass('no-ajax');
return array(
$this->targetFragment => '<p class="grid-csv-button">' . $button->Field() . '</p>',
);
}
/**
* export is an action button
*/
public function getActions($gridField) {
return array('export');
}
function handleAction(GridField $gridField, $actionName, $arguments, $data) {
if($actionName == 'export') {
return $this->handleExport($gridField);
}
}
/**
* it is also a URL
*/
function getURLHandlers($gridField) {
return array(
'export' => 'handleExport',
);
}
/**
* Handle the export, for both the action button and the URL
*/
public function handleExport($gridField, $request = null) {
$now = Date("d-m-Y-H-i");
$fileName = "export-$now.csv";
if($fileData = $this->generateExportFileData($gridField)){
return SS_HTTPRequest::send_file($fileData, $fileName, 'text/csv');
}
}
/**
* Generate export fields for CSV.
*
* @param GridField $gridField
* @return array
*/
function generateExportFileData($gridField) {
$separator = $this->csvSeparator;
$csvColumns = ($this->exportColumns) ? $this->exportColumns : singleton($gridField->getModelClass())->summaryFields();
$fileData = '';
$columnData = array();
$fieldItems = new ArrayList();
if($this->csvHasHeader) {
$headers = array();
// determine the CSV headers. If a field is callable (e.g. anonymous function) then use the
// source name as the header instead
foreach($csvColumns as $columnSource => $columnHeader) {
$headers[] = (!is_string($columnHeader) && is_callable($columnHeader)) ? $columnSource : $columnHeader;
}
$fileData .= "\"" . implode("\"{$separator}\"", array_values($headers)) . "\"";
$fileData .= "\n";
}
$items = $gridField->getList();
// @todo should GridFieldComponents change behaviour based on whether others are available in the config?
foreach($gridField->getConfig()->getComponents() as $component){
if($component instanceof GridFieldFilterHeader || $component instanceof GridFieldSortableHeader) {
$items = $component->getManipulatedData($gridField, $items);
}
}
foreach($items as $item) {
$columnData = array();
foreach($csvColumns as $columnSource => $columnHeader) {
if(!is_string($columnHeader) && is_callable($columnHeader)) {
if($item->hasMethod($columnSource)) {
$relObj = $item->{$columnSource}();
} else {
$relObj = $item->relObject($columnSource);
}
$value = $columnHeader($relObj);
} else {
$value = $gridField->getDataFieldValue($item, $columnSource);
}
$value = str_replace(array("\r", "\n"), "\n", $value);
$columnData[] = '"' . str_replace('"', '\"', $value) . '"';
}
$fileData .= implode($separator, $columnData);
$fileData .= "\n";
$item->destroy();
}
return $fileData;
}
/**
* @return array
*/
function getExportColumns() {
return $this->exportColumns;
}
/**
* @param array
*/
function setExportColumns($cols) {
$this->exportColumns = $cols;
return $this;
}
/**
* @return string
*/
function getCsvSeparator() {
return $this->csvSeparator;
}
/**
* @param string
*/
function setCsvSeparator($separator) {
$this->csvSeparator = $separator;
return $this;
}
/**
* @return boolean
*/
function getCsvHasHeader() {
return $this->csvHasHeader;
}
/**
* @param boolean
*/
function setCsvHasHeader($bool) {
$this->csvHasHeader = $bool;
return $this;
}
}
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