'',
'pageNum' => 0,
'type' => '', // first, previous, next, last, current, or separator
);
public function __construct($label, $pageNum, $type = '') {
$this->data['label'] = $label;
$this->data['pageNum'] = $pageNum;
$this->data['type'] = $type;
}
public function __get($property) {
return isset($this->data[$property]) ? $this->data[$property] : false;
}
public function __set($property, $value) {
$this->data[$property] = $value;
}
}
/**
* Collection of Pager items that determines which pagination links should be used
*
* USAGE EXAMPLE:
*
* $pager = new PagerNav(100, 10, 0);
*
* foreach($pager as $pageLabel => $pageNum) {
* $class = "action";
* if($pageNum == $pager->getCurrentPage()) $class .= " on";
* $out .= "$pageLabel";
* }
*
*/
class PagerNav implements \IteratorAggregate {
protected $totalPages = 0;
protected $currentPage = 0;
protected $pager = NULL;
protected $numPageLinks = 10;
protected $totalItems = 0;
protected $firstItem = 0;
protected $itemsPerPage = 0;
protected $labels = array(
'previous' => 'prev',
'next' => 'next'
);
protected $separator = NULL;
/**
* Construct the PagerNav
*
* @param int $totalItems Total number of items in the list to be paginated.
* @param int $itemsPerPage The number of items you want to appear per page.
* @param int $currentPage The current page number (NOTE: 0 based, not 1 based)
* @throws WireException if given itemsPerPage of 0
*
*/
public function __construct($totalItems, $itemsPerPage, $currentPage) {
// note that the page numbers are zero based.
// if you are one based, then subtract one from currentPage before passing in here
if(!$itemsPerPage) throw new WireException("itemsPerPage must be more than 0");
$this->totalItems = $totalItems;
$this->currentPage = $currentPage-1;
$this->itemsPerPage = $itemsPerPage;
$this->firstItem = $this->currentPage * $this->itemsPerPage;
/*
// commented and kept for future reference
if($totalItems >= ($itemsPerPage * 2)) {
$this->totalPages = floor($this->totalItems / $this->itemsPerPage)-1;
} else {
//$this->totalPages = ceil($this->totalItems / $this->itemsPerPage)-1;
$this->totalPages = ceil($this->totalItems / $this->itemsPerPage);
}
*/
if($this->totalItems > 0) $this->totalPages = ceil($this->totalItems / $this->itemsPerPage)-1;
else $this->totalPages = 0;
/*
// uncomment this section for debugging
echo "totalItems: " . $this->totalItems . "
" .
"totalPages: " . $this->totalPages . "
" .
"currentPage: " . $this->currentPage . "
" .
"itemsPerPage: " . $this->itemsPerPage . "
";
*/
if($this->totalPages && (($this->totalPages * $this->itemsPerPage) >= $this->totalItems))
$this->totalPages--; // totalPages zero based
$this->separator = new PagerNavItem('', 0, PagerNavItem::typeSeparator);
}
/**
* Returns an array contantaining $label => $pageNum
*
* Rather than access this function directly, it is prefereable to iterate the object.
*
* @return array
*
*/
public function getPager() {
// returns array($pageLabel => $pageNum, ...)
if($this->totalItems <= $this->itemsPerPage) return array();
if(!is_null($this->pager)) return $this->pager;
$this->pager = array();
if($this->numPageLinks) {
$numPageLinks = $this->numPageLinks-1;
//$numHalf = (int) round($numPageLinks / 2);
$numHalf = (int) floor($numPageLinks / 2);
$startPage = $this->currentPage - $numHalf;
if($startPage <= 0) {
$startPage = 0;
} else if($startPage > 0) {
$numPageLinks--;
}
$endPage = $startPage + $numPageLinks;
if($endPage > $this->totalPages) {
$endPage = $this->totalPages;
$startPage = $endPage - $numPageLinks;
if($startPage < 0) $startPage = 0;
}
} else {
$startPage = 0;
$endPage = $this->totalPages;
}
/*
// uncomment for debugging purposes
echo "numPageLinks=$numPageLinks
" .
"numHalf=$numHalf
" .
"startPage=$startPage
" .
"endPage=$endPage
" .
"totalPages={$this->totalPages}
" .
"totalItems={$this->totalItems}
";
*/
for($n = $startPage; $n <= ($endPage+1); $n++) {
$type = $n == ($this->currentPage+1) ? PagerNavItem::typeCurrent : '';
if($n) $this->pager[] = new PagerNavItem($n, $n - 1, $type);
}
if($this->currentPage < $this->totalPages) {
$useLast = true;
$item = null;
$key = null;
foreach($this->pager as $key => $item) {
if($item->pageNum == $this->totalPages) $useLast = false;
}
/*
if($item && $item->pageNum == ($this->totalPages-1)) {
unset($this->pager[$key]);
$this->pager[] = $this->separator;
$this->pager[] = new PagerNavItem($this->totalPages+1, $this->totalPages);
$useLast = false;
}
*/
if($useLast) {
$this->pager[] = $this->separator;
$this->pager[] = new PagerNavItem($this->totalPages+1, $this->totalPages, PagerNavItem::typeLast);
}
if($this->getLabel('next')) $this->pager[] = new PagerNavItem($this->getLabel('next'), $this->currentPage+1, PagerNavItem::typeNext);
}
if(count($this->pager) > 1) {
$firstPageLink = false;
foreach($this->pager as $key => $item) {
// convert from 0-based to 1-based
if($item->type != 'separator') $item->pageNum = $item->pageNum+1;
if($item->pageNum == 1) $firstPageLink = true;
}
if(!$firstPageLink) {
// if the first page in pager is page 2, then get rid of it because we're already adding a page 1 (via typeFirst)
// and leaving it here would result in 1 ... 2
$item = reset($this->pager);
if($item->pageNum == 2) array_shift($this->pager);
array_unshift($this->pager, $this->separator);
array_unshift($this->pager, new PagerNavItem(1, 1, PagerNavItem::typeFirst)); // add reference to page 1
}
if($this->currentPage > 0 && $this->getLabel('previous')) {
array_unshift($this->pager, new PagerNavItem($this->getLabel('previous'), $this->currentPage, PagerNavItem::typePrevious));
}
} else $this->pager = array();
return $this->pager;
}
public function getIterator() { return new \ArrayObject($this->getPager()); }
public function getFirstItem() { return $this->firstItem; }
public function getItemsPerPage() { return $this->itemsPerPage; }
public function getCurrentPage() { return $this->currentPage; }
public function getTotalPages() { return $this->totalPages+1; }
public function getLabel($key) { return isset($this->labels[$key]) ? $this->labels[$key] : ''; }
public function setNumPageLinks($numPageLinks) { $this->numPageLinks = $numPageLinks; }
/**
* Set the labels to use for the 'prev' and 'next' links
*
* @param string $previous 'Previous' label
* @param string $next 'Next' label
*
*/
public function setLabels($previous, $next) {
$this->labels['previous'] = $previous;
$this->labels['next'] = $next;
}
}