/**
* Prepare Grid for Drawing
*
* @return self
*
* @throws \Exception
*/
protected function prepare()
{
if ($this->prepared) {
return $this;
}
if ($this->source->isDataLoaded()) {
$this->rows = $this->source->executeFromData($this->columns->getIterator(true), $this->page, $this->limit, $this->maxResults);
} else {
$this->rows = $this->source->execute($this->columns->getIterator(true), $this->page, $this->limit, $this->maxResults, $this->dataJunction);
}
if (!$this->rows instanceof Rows) {
throw new \Exception('Source have to return Rows object.');
}
if (count($this->rows) == 0 && $this->page > 0) {
$this->page = 0;
$this->prepare();
return $this;
}
//add row actions column
if (count($this->rowActions) > 0) {
foreach ($this->rowActions as $column => $rowActions) {
if ($actionColumn = $this->columns->hasColumnById($column, true)) {
$actionColumn->setRowActions($rowActions);
} else {
$actionColumn = new ActionsColumn($column, $this->actionsColumnTitle, $rowActions);
if ($this->actionsColumnSize > -1) {
$actionColumn->setSize($this->actionsColumnSize);
}
$this->columns->addColumn($actionColumn);
}
}
}
//add mass actions column
if (count($this->massActions) > 0) {
$this->columns->addColumn(new MassActionColumn(), 1);
}
$primaryColumnId = $this->columns->getPrimaryColumn()->getId();
foreach ($this->rows as $row) {
$row->setPrimaryField($primaryColumnId);
}
//@todo refactor autohide titles when no title is set
if (!$this->showTitles) {
$this->showTitles = false;
foreach ($this->columns as $column) {
if (!$this->showTitles) {
break;
}
if ($column->getTitle() != '') {
$this->showTitles = true;
break;
}
}
}
//get size
if ($this->source->isDataLoaded()) {
$this->source->populateSelectFiltersFromData($this->columns);
$this->totalCount = $this->source->getTotalCountFromData($this->maxResults);
} else {
$this->source->populateSelectFilters($this->columns);
$this->totalCount = $this->source->getTotalCount($this->maxResults);
}
if (!is_int($this->totalCount)) {
throw new \Exception(sprintf('Source function getTotalCount need to return integer result, returned: %s', gettype($this->totalCount)));
}
$this->prepared = true;
return $this;
}
