289 lines
9.1 KiB
PHP
289 lines
9.1 KiB
PHP
<?php
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/**
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* This component provides a checkbox which when checked enables drag-and-drop re-ordering of elements displayed in a {@link GridField}
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*
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* @package forms
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*/
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class GridFieldSortableRows implements GridField_HTMLProvider, GridField_ActionProvider, GridField_DataManipulator {
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protected $sortColumn;
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/**
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* @param String $sortColumn Column that should be used to update the sort information
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*/
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public function __construct($sortColumn) {
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$this->sortColumn = $sortColumn;
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}
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/**
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* Returns a map where the keys are fragment names and the values are pieces of HTML to add to these fragments.
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* @param GridField $gridField Grid Field Reference
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* @return Array Map where the keys are fragment names and the values are pieces of HTML to add to these fragments.
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*/
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public function getHTMLFragments($gridField) {
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$state = $gridField->State->GridFieldSortableRows;
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if(!is_bool($state->sortableToggle)) {
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$state->sortableToggle = false;
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}
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//Ensure user can edit
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if(!singleton($gridField->getModelClass())->canEdit()){
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return array();
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}
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//Sort order toggle
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$sortOrderToggle = Object::create(
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'GridField_FormAction',
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$gridField,
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'sortablerows-toggle',
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_t('GridFieldSortableRows.ALLOW_DRAG_DROP', '_Allow drag and drop re-ordering'),
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'saveGridRowSort',
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null
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)->addExtraClass('sortablerows-toggle');
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//Disable Pagenator
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$disablePagenator = Object::create(
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'GridField_FormAction',
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$gridField,
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'sortablerows-disablepagenator',
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_t('GridFieldSortableRows.DISABLE_PAGINATOR', '_Disable Pagenator'),
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'sortableRowsDisablePaginator',
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null
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)->addExtraClass('sortablerows-disablepagenator');
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//Disable Pagenator
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$sortToPage = Object::create(
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'GridField_FormAction',
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$gridField,
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'sortablerows-sorttopage',
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_t('GridFieldSortableRows.SORT_TO_PAGE', '_Sort To Page'),
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'sortToPage',
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null
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)->addExtraClass('sortablerows-sorttopage');
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$data = array('SortableToggle' => $sortOrderToggle,
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'PagenatorToggle' => $disablePagenator,
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'SortToPage' => $sortToPage,
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'Checked' => ($state->sortableToggle == true ? ' checked = "checked"':''));
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$forTemplate = new ArrayData($data);
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//Inject Requirements
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Requirements::css('SortableGridField/css/GridFieldSortableRows.css');
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Requirements::javascript('SortableGridField/javascript/GridFieldSortableRows.js');
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$args = array('Colspan' => count($gridField->getColumns()));
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return array('header' => $forTemplate->renderWith('GridFieldSortableRows', $args));
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}
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/**
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* Manipulate the datalist as needed by this grid modifier.
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* @param GridField $gridField Grid Field Reference
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* @param SS_List $dataList Data List to adjust
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* @return DataList Modified Data List
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*/
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public function getManipulatedData(GridField $gridField, SS_List $dataList) {
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$state = $gridField->State->GridFieldSortableHeader;
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if ($state && !empty($state->SortColumn)) {
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return $dataList;
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}
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return $dataList->sort($this->sortColumn);
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}
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/**
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* Return a list of the actions handled by this action provider.
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* @param GridField $gridField Grid Field Reference
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* @return Array Array with action identifier strings.
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*/
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public function getActions($gridField) {
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return array('saveGridRowSort', 'sortableRowsDisablePaginator', 'sortToPage');
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}
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/**
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* Handle an action on the given grid field.
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* @param GridField $gridField Grid Field Reference
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* @param String $actionName Action identifier, see {@link getActions()}.
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* @param Array $arguments Arguments relevant for this
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* @param Array $data All form data
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*/
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public function handleAction(GridField $gridField, $actionName, $arguments, $data) {
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$state = $gridField->State->GridFieldSortableRows;
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if (!is_bool($state->sortableToggle)) {
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$state->sortableToggle = false;
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} else if ($state->sortableToggle == true) {
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$gridField->getConfig()->removeComponentsByType('GridFieldFilterHeader');
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$gridField->getConfig()->removeComponentsByType('GridFieldSortableHeader');
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}
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if ($actionName == 'savegridrowsort') {
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return $this->saveGridRowSort($gridField, $data);
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} else if ($actionName == 'sorttopage') {
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return $this->sortToPage($gridField, $data);
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}
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}
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/**
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* Handles saving of the row sort order
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* @param GridField $gridField Grid Field Reference
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* @param Array $data Data submitted in the request
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*/
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protected function saveGridRowSort(GridField $gridField, $data) {
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if(!singleton($gridField->getModelClass())->canEdit()){
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throw new ValidationException(_t('GridFieldSortableRows.EditPermissionsFailure', "No edit permissions"),0);
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}
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if (empty($data['Items'])) {
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user_error('No items to sort', E_USER_ERROR);
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}
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$className = $gridField->getModelClass();
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$owner = $gridField->Form->getRecord();
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$items = $gridField->getList();
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$many_many = ($items instanceof ManyManyList);
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$sortColumn = $this->sortColumn;
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$pageOffset = 0;
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if ($paginator = $gridField->getConfig()->getComponentsByType('GridFieldPaginator')->First()) {
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$pageState = $gridField->State->GridFieldPaginator;
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if($pageState->currentPage && $pageState->currentPage>1) {
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$pageOffset = $paginator->getItemsPerPage() * ($pageState->currentPage - 1);
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}
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}
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if ($many_many) {
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list($parentClass, $componentClass, $parentField, $componentField, $table) = $owner->many_many($gridField->getName());
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}
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//Start transaction if supported
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if(DB::getConn()->supportsTransactions()) {
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DB::getConn()->transactionStart();
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}
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//@TODO Need to optimize this to eliminate some of the resource load could use raw queries to be more efficient
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$data['Items'] = explode(',', $data['Items']);
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for($sort = 0;$sort<count($data['Items']);$sort++) {
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$id = intval($data['Items'][$sort]);
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if ($many_many) {
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DB::query('UPDATE "' . $table
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. '" SET "' . $sortColumn.'" = ' . (($sort + 1) + $pageOffset)
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. ' WHERE "' . $componentField . '" = ' . $id . ' AND "' . $parentField . '" = ' . $owner->ID);
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} else {
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$obj = $items->byID($data['Items'][$sort]);
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$obj->$sortColumn = ($sort + 1) + $pageOffset;
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$obj->write();
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}
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}
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//End transaction if supported
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if(DB::getConn()->supportsTransactions()) {
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DB::getConn()->transactionEnd();
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}
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}
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/**
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* Handles sorting across pages
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* @param GridField $gridField Grid Field Reference
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* @param Array $data Data submitted in the request
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*/
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protected function sortToPage(GridField $gridField, $data) {
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if (!$paginator = $gridField->getConfig()->getComponentsByType('GridFieldPaginator')->First()) {
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user_error('Paginator not detected', E_USER_ERROR);
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}
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if (empty($data['ItemID'])) {
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user_error('No item to sort', E_USER_ERROR);
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}
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if (empty($data['Target'])) {
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user_error('No target page', E_USER_ERROR);
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}
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$className = $gridField->getModelClass();
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$owner = $gridField->Form->getRecord();
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$items = $gridField->getList();
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$many_many = ($items instanceof ManyManyList);
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$sortColumn = $this->sortColumn;
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$targetItem = $items->byID(intval($data['ItemID']));
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if (!$targetItem) {
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user_error('Target item not found', E_USER_ERROR);
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}
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$sortPosition = $targetItem->$sortColumn;
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$currentPage = 1;
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$pageState = $gridField->State->GridFieldPaginator;
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if($pageState->currentPage && $pageState->currentPage>1) {
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$currentPage = $pageState->currentPage;
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}
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if ($many_many) {
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list($parentClass, $componentClass, $parentField, $componentField, $table) = $owner->many_many($gridField->getName());
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}
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if ($data['Target'] == 'firstpage') {
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$sortPosition = $paginator->getItemsPerPage();
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} else if ($data['Target'] == 'previouspage') {
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$sortPosition = $paginator->getItemsPerPage() * ($currentPage - 1);
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} else if ($data['Target'] == 'nextpage') {
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$sortPosition = ($paginator->getItemsPerPage() * $currentPage) + 1;
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} else if ($data['Target'] == 'lastpage') {
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$sortPosition = ($paginator->getItemsPerPage() * (ceil($items->count() / $paginator->getItemsPerPage()) - 1)) + 1;
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} else {
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user_error('Not implemented: '.$data['Target'], E_USER_ERROR);
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}
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if($targetItem->$sortColumn != $sortPosition) {
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//Start transaction if supported
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if(DB::getConn()->supportsTransactions()) {
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DB::getConn()->transactionStart();
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}
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//Swap with the item around the target position
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$swapItem = $items->where('"'.$sortColumn.'" >= '.$sortPosition)->First();
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if ($many_many) {
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DB::query('UPDATE "' . $table
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. '" SET "' . $sortColumn.'" = ' . $targetItem->$sortColumn
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. ' WHERE "' . $componentField . '" = ' . $targetItem->ID . ' AND "' . $parentField . '" = ' . $owner->ID);
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} else {
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$swapItem->$sortColumn = $targetItem->$sortColumn;
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$swapItem->write();
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}
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//Update target item position
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if ($many_many) {
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DB::query('UPDATE "' . $table
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. '" SET "' . $sortColumn.'" = ' . $sortPosition
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. ' WHERE "' . $componentField . '" = ' . $targetItem->ID . ' AND "' . $parentField . '" = ' . $owner->ID);
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} else {
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$targetItem->$sortColumn = $sortPosition;
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$targetItem->write();
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}
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//End transaction if supported
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if(DB::getConn()->supportsTransactions()) {
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DB::getConn()->transactionEnd();
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}
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}
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}
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}
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?>
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