silverstripe-blog/code/extensions/BlogFilter.php

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<?php
/**
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* This class is responsible for filtering the SiteTree when necessary and also overlaps into
* filtering only published posts.
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*
* @package silverstripe
* @subpackage blog
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*/
class BlogFilter extends Lumberjack {
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/**
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* {@inheritdoc}
*/
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public function stageChildren($showAll = false) {
$staged = parent::stageChildren($showAll);
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if(!$this->shouldFilter() && $this->subclassForBlog() && !Permission::check('VIEW_DRAFT_CONTENT')) {
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$stage = Versioned::current_stage();
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if($stage == 'Stage') {
$stage = '';
} elseif($stage) {
$stage = '_' . $stage;
}
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$dataQuery = $staged->dataQuery()
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->innerJoin('BlogPost', sprintf('"BlogPost%s"."ID" = "SiteTree%s"."ID"', $stage, $stage))
->where(sprintf('"PublishDate" < \'%s\'', Convert::raw2sql(SS_Datetime::now())));
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$staged = $staged->setDataQuery($dataQuery);
}
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return $staged;
}
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/**
* @return bool
*/
protected function subclassForBlog() {
return in_array(get_class($this->owner), ClassInfo::subClassesFor('Blog'));
}
/**
* {@inheritdoc}
*/
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public function liveChildren($showAll = false, $onlyDeletedFromStage = false) {
$staged = parent::liveChildren($showAll, $onlyDeletedFromStage);
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if(!$this->shouldFilter() && $this->isBlog() && !Permission::check('VIEW_DRAFT_CONTENT')) {
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$dataQuery = $staged->dataQuery()
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->innerJoin('BlogPost', '"BlogPost_Live"."ID" = "SiteTree_Live"."ID"')
->where(sprintf('"PublishDate" < \'%s\'', Convert::raw2sql(SS_Datetime::now())));
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$staged = $staged->setDataQuery($dataQuery);
}
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return $staged;
}
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/**
* @return bool
*/
protected function isBlog() {
return $this->owner instanceof Blog;
}
/**
* {@inheritdoc}
*/
public function updateCMSFields(FieldList $fields) {
$excluded = $this->owner->getExcludedSiteTreeClassNames();
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if(!empty($excluded)) {
$pages = SiteTree::get()->filter(array(
'ParentID' => $this->owner->ID,
'ClassName' => $excluded
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))->sort('"SiteTree"."Created" DESC');
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$gridField = new BlogFilter_GridField(
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'ChildPages',
$this->getLumberjackTitle(),
$pages,
$this->getLumberjackGridFieldConfig()
);
$tab = new Tab('ChildPages', $this->getLumberjackTitle(), $gridField);
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$fields->insertBefore($tab, 'Main');
}
}
}
/**
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* Enables children of non-editable pages to be edited.
*/
class BlogFilter_GridField extends GridField {
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/**
* @param FormTransformation $transformation
*
* @return $this
*/
public function transform(FormTransformation $transformation) {
return $this;
}
}