silverstripe-blog/code/extensions/BlogFilter.php

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<?php
/**
* 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
*
* @author Michael Strong <github@michaelstrong.co.uk>
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*
**/
class BlogFilter extends Lumberjack {
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/**
* Augments (@link Hierarchy::stageChildren()}
*
* @param $staged DataList
* @param $showAll boolean
**/
public function stageChildren($showAll = false) {
$staged = parent::stageChildren($showAll);
if(!$this->shouldFilter()
&& in_array(get_class($this->owner), ClassInfo::subClassesFor("Blog"))
&& !Permission::check("VIEW_DRAFT_CONTENT")
) {
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// Get the current stage.
$stage = Versioned::current_stage();
if($stage == "Stage") $stage = "";
elseif($stage) $stage = "_{$stage}";
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// Filter published posts
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$dataQuery = $staged->dataQuery()
->innerJoin("BlogPost", '"BlogPost' . $stage . '"."ID" = "SiteTree' . $stage . '"."ID"')
->where('"PublishDate" < \'' . Convert::raw2sql(SS_Datetime::now()) . '\'');
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$staged = $staged->setDataQuery($dataQuery);
}
return $staged;
}
public function liveChildren($showAll = false, $onlyDeletedFromStage = false) {
$staged = parent::liveChildren($showAll, $onlyDeletedFromStage);
if(!$this->shouldFilter()
&& $this->owner instanceof Blog
&& !Permission::check("VIEW_DRAFT_CONTENT")
) {
// Filter publish posts
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$dataQuery = $staged->dataQuery()
->innerJoin("BlogPost", '"BlogPost_Live"."ID" = "SiteTree_Live"."ID"')
->where('"BlogPost"."PublishDate" < \'' . Convert::raw2sql(SS_Datetime::now()->getValue()) . '\'');
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$staged = $staged->setDataQuery($dataQuery);
}
return $staged;
}
public function updateCMSFields(FieldList $fields) {
$excluded = $this->owner->getExcludedSiteTreeClassNames();
if(!empty($excluded)) {
$pages = SiteTree::get()->filter(array(
'ParentID' => $this->owner->ID,
'ClassName' => $excluded
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))->sort('"SiteTree"."Created" DESC');
$gridField = new BlogFilter_GridField(
"ChildPages",
$this->getLumberjackTitle(),
$pages,
$this->getLumberjackGridFieldConfig()
);
$tab = new Tab('ChildPages', $this->getLumberjackTitle(), $gridField);
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$fields->insertBefore($tab, 'Main');
}
}
}
/**
* Enables children of non-editable pages to be edited
*/
class BlogFilter_GridField extends GridField {
public function transform(FormTransformation $trans) {
// Don't allow parent object transformations to propegate automatically to child records
return $this;
}
}