/**
*
* @access public
* @param Array $categories
* @param \CCDNForum\ForumBundle\Entity\Category $categoryShift
* @param int $direction
* @return \CCDNForum\ForumBundle\Manager\BaseManagerInterface
*/
public function reorderCategories($categories, Category $categoryShift, $direction)
{
$categoryCount = (count($categories) - 1);
// Find category in collection to shift and use list order as array key for easier editing.
$sorted = array();
$shiftIndex = null;
foreach ($categories as $categoryIndex => $category) {
if ($categories[$categoryIndex]->getId() == $categoryShift->getId()) {
$shiftIndex = $categoryIndex;
}
$sorted[$categoryIndex] = $category;
}
$incrementKeysAfterIndex = function($index, $arr) {
$hydrated = array();
foreach ($arr as $key => $el) {
if ($key > $index) {
$hydrated[$key + 1] = $el;
} else {
$hydrated[$key] = $el;
}
}
return $hydrated;
};
$decrementKeysBeforeIndex = function($index, $arr) {
$hydrated = array();
foreach ($arr as $key => $el) {
if ($key < $index) {
$hydrated[$key - 1] = $el;
} else {
$hydrated[$key] = $el;
}
}
return $hydrated;
};
$shifted = array();
// First Category needs reordering??
if ($shiftIndex == 0) {
if ($direction) { // Down (move down 1)
$shifted = $sorted;
$shifted[$shiftIndex] = $sorted[$shiftIndex + 1];
$shifted[$shiftIndex + 1] = $sorted[$shiftIndex];
} else { // Up (send to bottom)
$shifted[$categoryCount] = $sorted[0];
unset($sorted[0]);
$shifted = array_merge($decrementKeysBeforeIndex($categoryCount + 1, $sorted), $shifted);
}
} else {
// Last category needs reordering??
if ($shiftIndex == $categoryCount) {
if ($direction) { // Down (send to top)
$shifted[0] = $sorted[$categoryCount];
unset($sorted[$categoryCount]);
$shifted = array_merge($shifted, $incrementKeysAfterIndex(-1, $sorted));
} else { // Up (move up 1)
$shifted = $sorted;
$shifted[$shiftIndex] = $sorted[$shiftIndex - 1];
$shifted[$shiftIndex - 1] = $sorted[$shiftIndex];
}
} else {
// Swap 2 categories not at beginning or end.
$shifted = $sorted;
if ($direction) { // Down (move down 1)
$shifted[$shiftIndex] = $sorted[$shiftIndex + 1];
$shifted[$shiftIndex + 1] = $sorted[$shiftIndex];
} else { // Up (move up 1)
$shifted[$shiftIndex] = $sorted[$shiftIndex - 1];
$shifted[$shiftIndex - 1] = $sorted[$shiftIndex];
}
}
}
// Set the order from the $index arranged prior and persist.
foreach ($shifted as $index => $category) {
$category->setListOrderPriority($index);
$this->persist($category);
}
$this->flush();
return $this;
}