/**
* Computes node positions and updates the sort field in memory and in the db
*
* @param SortableAdapter $ea
* @param array $config
* @param ClassMetadata $meta
* @param object $object
*/
private function processUpdate(SortableAdapter $ea, array $config, $meta, $object)
{
$em = $ea->getObjectManager();
$uow = $em->getUnitOfWork();
$changed = false;
$groupHasChanged = false;
$changeSet = $ea->getObjectChangeSet($uow, $object);
// Get groups
$groups = $this->getGroups($meta, $config, $object);
// handle old groups
$oldGroups = $groups;
foreach (array_keys($groups) as $group) {
if (array_key_exists($group, $changeSet)) {
$changed = true;
$oldGroups[$group] = $changeSet[$group][0];
}
}
if ($changed) {
$oldHash = $this->getHash($oldGroups, $config);
$this->maxPositions[$oldHash] = $this->getMaxPosition($ea, $meta, $config, $object, $oldGroups);
if (array_key_exists($config['position'], $changeSet)) {
$oldPosition = $changeSet[$config['position']][0];
} else {
$oldPosition = $meta->getReflectionProperty($config['position'])->getValue($object);
}
$this->addRelocation($oldHash, $config['useObjectClass'], $oldGroups, $oldPosition + 1, $this->maxPositions[$oldHash] + 1, -1);
$groupHasChanged = true;
}
if (array_key_exists($config['position'], $changeSet)) {
// position was manually updated
$oldPosition = $changeSet[$config['position']][0];
$newPosition = $changeSet[$config['position']][1];
$changed = $changed || $oldPosition != $newPosition;
} elseif ($changed) {
// group has changed, so position has to be recalculated
$oldPosition = -1;
$newPosition = -1;
// specific case
}
if ($groupHasChanged) {
$oldPosition = -1;
}
if (!$changed) {
return;
}
// Get hash
$hash = $this->getHash($groups, $config);
// Get max position
if (!isset($this->maxPositions[$hash])) {
$this->maxPositions[$hash] = $this->getMaxPosition($ea, $meta, $config, $object);
}
// Compute position if it is negative
if ($newPosition < 0) {
if ($oldPosition === -1) {
$newPosition += $this->maxPositions[$hash] + 2;
// position == -1 => append at end of list
} else {
$newPosition += $this->maxPositions[$hash] + 1;
// position == -1 => append at end of list
}
if ($newPosition < 0) {
$newPosition = 0;
}
} else {
$newPosition = min(array($this->maxPositions[$hash], $newPosition));
}
// Compute relocations
/*
CASE 1: shift backwards
|----0----|----1----|----2----|----3----|----4----|
|--node1--|--node2--|--node3--|--node4--|--node5--|
Update node4: setPosition(1)
--> Update position + 1 where position in [1,3)
|--node1--|--node4--|--node2--|--node3--|--node5--|
CASE 2: shift forward
|----0----|----1----|----2----|----3----|----4----|
|--node1--|--node2--|--node3--|--node4--|--node5--|
Update node2: setPosition(3)
--> Update position - 1 where position in (1,3]
|--node1--|--node3--|--node4--|--node2--|--node5--|
*/
$relocation = null;
if ($oldPosition === -1) {
// special case when group changes
$relocation = array($hash, $config['useObjectClass'], $groups, $newPosition, -1, +1);
} elseif ($newPosition < $oldPosition) {
$relocation = array($hash, $config['useObjectClass'], $groups, $newPosition, $oldPosition, +1);
} elseif ($newPosition > $oldPosition) {
$relocation = array($hash, $config['useObjectClass'], $groups, $oldPosition + 1, $newPosition + 1, -1);
}
// Apply existing relocations
$applyDelta = 0;
if (isset($this->relocations[$hash])) {
foreach ($this->relocations[$hash]['deltas'] as $delta) {
if ($delta['start'] <= $newPosition && ($delta['stop'] > $newPosition || $delta['stop'] < 0)) {
$applyDelta += $delta['delta'];
}
}
}
$newPosition += $applyDelta;
if ($relocation) {
// Add relocation
call_user_func_array(array($this, 'addRelocation'), $relocation);
}
// Set new position
$meta->getReflectionProperty($config['position'])->setValue($object, $newPosition);
$ea->recomputeSingleObjectChangeSet($uow, $meta, $object);
}
/**
* @param SortableAdapter $ea
*/
private function processRelocations(SortableAdapter $ea)
{
$em = $ea->getObjectManager();
foreach ($this->relocations as $hash => $relocation) {
$config = $this->getConfiguration($em, $relocation['name']);
foreach ($relocation['deltas'] as $delta) {
if ($delta['start'] > $this->maxPositions[$hash] || $delta['delta'] == 0) {
continue;
}
$ea->updatePositions($relocation, $delta, $config);
$meta = $em->getClassMetadata($relocation['name']);
// now walk through the unit of work in memory objects and sync those
$uow = $em->getUnitOfWork();
foreach ($uow->getIdentityMap() as $className => $objects) {
// for inheritance mapped classes, only root is always in the identity map
if ($className !== $ea->getRootObjectClass($meta) || !$this->getConfiguration($em, $className)) {
continue;
}
foreach ($objects as $object) {
if ($object instanceof Proxy && !$object->__isInitialized__) {
continue;
}
// if the entity's position is already changed, stop now
if (array_key_exists($config['position'], $ea->getObjectChangeSet($uow, $object))) {
continue;
}
$oid = spl_object_hash($object);
$pos = $meta->getReflectionProperty($config['position'])->getValue($object);
$matches = $pos >= $delta['start'];
$matches = $matches && ($delta['stop'] <= 0 || $pos < $delta['stop']);
$value = reset($relocation['groups']);
while ($matches && ($group = key($relocation['groups']))) {
$gr = $meta->getReflectionProperty($group)->getValue($object);
if (null === $value) {
$matches = $gr === null;
} else {
$matches = $gr === $value;
}
$value = next($relocation['groups']);
}
if ($matches) {
$meta->getReflectionProperty($config['position'])->setValue($object, $pos + $delta['delta']);
$ea->setOriginalObjectProperty($uow, $oid, $config['position'], $pos + $delta['delta']);
}
}
}
}
}
// Clear relocations
$this->relocations = array();
$this->maxPositions = array();
}
