From 7bdca7f5cc44032474e2ed7368a24461a07782b8 Mon Sep 17 00:00:00 2001
From: David Craig <david@silverstripe.com>
Date: Tue, 28 Apr 2015 12:03:07 +1200
Subject: [PATCH] Added a list of pages where a file is used

---
 code/model/SiteTreeFileExtension.php | 34 +++++++++++++++++++++++++---
 1 file changed, 31 insertions(+), 3 deletions(-)

diff --git a/code/model/SiteTreeFileExtension.php b/code/model/SiteTreeFileExtension.php
index 76cc9d9f..d723f965 100644
--- a/code/model/SiteTreeFileExtension.php
+++ b/code/model/SiteTreeFileExtension.php
@@ -10,13 +10,41 @@ class SiteTreeFileExtension extends DataExtension {
 	);
 
 	public function updateCMSFields(FieldList $fields) {
-		$fields->insertAfter(new ReadonlyField('BackLinkCount', 
-			_t('AssetTableField.BACKLINKCOUNT', 'Used on:'), 
-			$this->BackLinkTracking()->Count() . ' ' . _t('AssetTableField.PAGES', 'page(s)')), 
+		$fields->insertAfter(
+			ReadonlyField::create(
+				'BackLinkCount', 
+				_t('AssetTableField.BACKLINKCOUNT', 'Used on:'), 
+				$this->BackLinkTracking()->Count() . ' ' . _t('AssetTableField.PAGES', 'page(s)'))
+			->addExtraClass('cms-description-toggle')
+			->setDescription($this->BackLinkHTMLList()),
 			'LastEdited'
 		);
 	}
 
+	/**
+	 * Generate an HTML list which provides links to where a file is used.
+	 *
+	 * @return String
+	 */
+	public function BackLinkHTMLList() {
+		$html = '<em>' . _t('SiteTreeFileExtension.BACKLINK_LIST_DESCRIPTION', 'This list shows all pages where the file has been added through a WYSIWYG editor.') . '</em>';
+		$html .= '<ul>';
+
+		foreach ($this->BackLinkTracking() as $backLink) {
+			$listItem = '<li>';
+
+			// Add the page link
+			$listItem .= '<a href="' . $backLink->Link() . '" target="_blank">' . Convert::raw2xml($backLink->MenuTitle) . '</a> &ndash; ';
+
+			// Add the CMS link
+			$listItem .= '<a href="' . $backLink->CMSEditLink() . '">' . _t('SiteTreeFileExtension.EDIT', 'Edit') . '</a>';
+
+			$html .= $listItem . '</li>';
+		}
+
+		return $html .= '</ul>';
+	}
+
 	/**
 	 * Extend through {@link updateBackLinkTracking()} in your own {@link Extension}.
 	 *