'SilverStripe\\CMS\\Model\\SiteTree.ImageTracking' // {@see SiteTreeLinkTracking}
);
/**
* Images tracked by pages are owned by those pages
*
* @config
* @var array
*/
private static $owned_by = array(
'BackLinkTracking'
);
public function updateCMSFields(FieldList $fields) {
$fields->insertAfter(
'LastEdited',
ReadonlyField::create(
'BackLinkCount',
_t('AssetTableField.BACKLINKCOUNT', 'Used on:'),
$this->BackLinkTracking()->count() . ' ' . _t('AssetTableField.PAGES', 'page(s)')
)
->addExtraClass('cms-description-toggle')
->setDescription($this->BackLinkHTMLList())
);
}
/**
* Generate an HTML list which provides links to where a file is used.
*
* @return string
*/
public function BackLinkHTMLList() {
$html = '' . _t(
'SiteTreeFileExtension.BACKLINK_LIST_DESCRIPTION',
'This list shows all pages where the file has been added through a WYSIWYG editor.'
) . '';
$html .= '';
foreach ($this->BackLinkTracking() as $backLink) {
// Add the page link and CMS link
$html .= sprintf(
'- %s – %s
',
Convert::raw2att($backLink->Link()),
Convert::raw2xml($backLink->MenuTitle),
Convert::raw2att($backLink->CMSEditLink()),
_t('SiteTreeFileExtension.EDIT', 'Edit')
);
}
$html .= '
';
return $html;
}
/**
* Extend through {@link updateBackLinkTracking()} in your own {@link Extension}.
*
* @return ManyManyList
*/
public function BackLinkTracking() {
if(class_exists("Subsite")){
$rememberSubsiteFilter = Subsite::$disable_subsite_filter;
Subsite::disable_subsite_filter(true);
}
$links = $this->owner->getManyManyComponents('BackLinkTracking');
$this->owner->extend('updateBackLinkTracking', $links);
if(class_exists("Subsite")){
Subsite::disable_subsite_filter($rememberSubsiteFilter);
}
return $links;
}
/**
* @todo Unnecessary shortcut for AssetTableField, coupled with cms module.
*
* @return int
*/
public function BackLinkTrackingCount() {
$pages = $this->owner->BackLinkTracking();
if($pages) {
return $pages->count();
} else {
return 0;
}
}
/**
* Updates link tracking in the current stage.
*/
public function onAfterDelete() {
// Skip live stage
if(Versioned::get_stage() === Versioned::LIVE) {
return;
}
// We query the explicit ID list, because BackLinkTracking will get modified after the stage
// site does its thing
$brokenPageIDs = $this->owner->BackLinkTracking()->column("ID");
if($brokenPageIDs) {
// This will syncLinkTracking on the same stage as this file
$brokenPages = DataObject::get('SilverStripe\\CMS\\Model\\SiteTree')->byIDs($brokenPageIDs);
foreach($brokenPages as $brokenPage) {
$brokenPage->write();
}
}
}
}