public function ajaxCatalogGetBooks()
{
$number = $_POST['number'];
$selectedGenresId = [];
$availability = 0;
$start = 0;
if (!empty($_POST['genres'])) {
$selectedGenresId = $_POST['genres'];
}
if (!empty($_POST['availability'])) {
$availability = $_POST['availability'];
}
if (!empty($_POST['start'])) {
$start = $_POST['start'];
}
$booksIdsToFind = [];
if (count($selectedGenresId) == 1) {
$bookGenreManager = new BookGenreManager();
$booksIdsToFind = $bookGenreManager->findBooksIdsByGenresAndAvailability($selectedGenresId, $availability);
} else {
if (count($selectedGenresId) > 1) {
$bookGenreManager = new BookGenreManager();
$unsortedBooksIds = $bookGenreManager->findBooksIdsByGenresAndAvailability($selectedGenresId, $availability);
$booksIdsToFind = $this->sortBooksIdsByOccurence($unsortedBooksIds);
}
}
$bookManager = new BookManager();
$last = $start + $number;
if (count($booksIdsToFind) == 0) {
$books = $bookManager->findBooks($start, $number);
$total = $bookManager->count();
} else {
$books = [];
$total = count($booksIdsToFind);
if ($total >= $start + $number) {
for ($index = $start; $index < $start + $number; $index++) {
$books[] = $bookManager->extendedFind($booksIdsToFind[$index]);
}
} else {
for ($index = $start; $index < $total; $index++) {
$books[] = $bookManager->extendedFind($booksIdsToFind[$index]);
}
$last = $total;
}
}
$first = $start + 1;
$precStart = $start - $number;
$nextStart = $start + $number;
$data = array('precStart' => $precStart, 'first' => $first, 'last' => $last, 'total' => $total, 'nextStart' => $nextStart, 'books' => $books);
$this->show('book/ajax_catalog_showBooks', $data);
}
