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Optimization for SiteTree::allowedChildren()

Browse Source 
Adds an `Object::extend('updateAllowedChildren')` whilst also
  caching the default response

Using `get_class($this)` as cache key as this is what is used
  in `Configurable::stat($name)` to retrieve the candidates
This commit is contained in:
Lee Bradley 2017-02-14 13:48:48 +00:00 committed by Damian Mooyman
parent bd86251043
commit 0570df95a8
1 changed files with 33 additions and 30 deletions
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63
code/Model/SiteTree.php
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@ -2467,40 +2467,43 @@ class SiteTree extends DataObject implements PermissionProvider, i18nEntityProvi
public function allowedChildren()
{
if (isset(static::$_allowedChildren[$this->ClassName])) {
return static::$_allowedChildren[$this->ClassName];
}
// Get config based on old FIRST_SET rules
$candidates = null;
$class = get_class($this);
while ($class) {
if (Config::inst()->exists($class, 'allowed_children', Config::UNINHERITED)) {
$candidates = Config::inst()->get($class, 'allowed_children', Config::UNINHERITED);
break;
}
$class = get_parent_class($class);
}
if (!$candidates || $candidates === 'none' || $candidates === 'SiteTree_root') {
return [];
}
// Parse candidate list
$allowedChildren = [];
foreach ($candidates as $candidate) {
// If a classname is prefixed by "*", such as "*Page", then only that class is allowed - no subclasses.
// Otherwise, the class and all its subclasses are allowed.
if (substr($candidate, 0, 1) == '*') {
$allowedChildren[] = substr($candidate, 1);
} elseif ($subclasses = ClassInfo::subclassesFor($candidate)) {
foreach ($subclasses as $subclass) {
if ($subclass == 'SiteTree_root' || singleton($subclass) instanceof HiddenClass) {
continue;
}
$allowedChildren[] = $subclass;
$allowedChildren = static::$_allowedChildren[$this->ClassName];
} else {
// Get config based on old FIRST_SET rules
$candidates = null;
$class = get_class($this);
while ($class) {
if (Config::inst()->exists($class, 'allowed_children', Config::UNINHERITED)) {
$candidates = Config::inst()->get($class, 'allowed_children', Config::UNINHERITED);
break;
}
$class = get_parent_class($class);
}
if (!$candidates || $candidates === 'none' || $candidates === 'SiteTree_root') {
return [];
}
// Parse candidate list
$allowedChildren = [];
foreach ($candidates as $candidate) {
// If a classname is prefixed by "*", such as "*Page", then only that class is allowed - no subclasses.
// Otherwise, the class and all its subclasses are allowed.
if (substr($candidate, 0, 1) == '*') {
$allowedChildren[] = substr($candidate, 1);
} elseif ($subclasses = ClassInfo::subclassesFor($candidate)) {
foreach ($subclasses as $subclass) {
if ($subclass == 'SiteTree_root' || singleton($subclass) instanceof HiddenClass) {
continue;
}
$allowedChildren[] = $subclass;
}
}
static::$_allowedChildren[get_class($this)] = $allowedChildren;
}
}
$this->extend('updateAllowedChildren', $allowedChildren);
return static::$_allowedChildren[$this->ClassName] = $allowedChildren;
return $allowedChildren;
}
/**