/**
* Update the sorting property values of all models.
*
* @return void
*/
private function updateSorting()
{
$ids = $this->getModelIds();
// If no "next" sibling, simply increment the sorting as we are at the end of the list.
if (!$this->marker) {
foreach ($this->results as $model) {
$this->position += 128;
/** @var ModelInterface $model */
$model->setProperty($this->getSortingProperty(), $this->position);
}
return;
}
$delta = $this->determineDelta();
// Loop over all models and increment sorting value.
foreach ($this->results as $model) {
$this->position += $delta;
/** @var ModelInterface $model */
$model->setProperty($this->getSortingProperty(), $this->position);
}
// When the sorting exceeds the sorting of the "next" sibling, we need to push the remaining siblings to the
// end of the list.
if ($this->marker->getProperty($this->getSortingProperty()) <= $this->position) {
do {
// Skip models about to be pasted.
if (in_array($this->marker->getId(), $ids)) {
$this->marker = $this->siblingsCopy->shift();
continue;
}
$this->position += $delta;
$this->marker->setProperty($this->getSortingProperty(), $this->position);
$this->results->push($this->marker);
$this->marker = $this->siblingsCopy->shift();
} while ($this->marker);
}
}
/**
* Calculate the resulting list.
*
* @return void
*/
protected function calculate()
{
if (isset($this->results) || $this->models->length() == 0) {
return;
}
$ids = $this->getModelIds();
$this->results = clone $this->models;
$this->siblingsCopy = clone $this->siblings;
$this->scanToDesiredPosition();
// If no "next" sibling, simply increment the sorting as we are at the end of the list.
if (!$this->marker) {
foreach ($this->results as $model) {
$this->position += 128;
/** @var ModelInterface $model */
$model->setProperty($this->getSortingProperty(), $this->position);
}
return;
}
// Determine delta value: ((next sorting - current sorting) / amount of insert models).
$delta = ($this->marker->getProperty($this->getSortingProperty()) - $this->position) / $this->results->length();
// If delta too narrow, we need to make room.
if ($delta < 2) {
$delta = 128;
}
// Loop over all models and increment sorting value.
foreach ($this->results as $model) {
$this->position += $delta;
/** @var ModelInterface $model */
$model->setProperty($this->getSortingProperty(), $this->position);
}
// When the sorting exceeds the sorting of the "next" sibling, we need to push the remaining siblings to the
// end of the list.
if ($this->marker->getProperty($this->getSortingProperty()) <= $this->position) {
do {
// Skip models about to be pasted.
if (in_array($this->marker->getId(), $ids)) {
$this->marker = $this->siblingsCopy->shift();
continue;
}
$this->position += $delta;
$this->marker->setProperty($this->getSortingProperty(), $this->position);
$this->results->push($this->marker);
$this->marker = $this->siblingsCopy->shift();
} while ($this->marker);
}
}
