+<?php
+
+namespace BookStack\Http\Controllers;
+
+use BookStack\Auth\Permissions\PermissionApplicator;
+use BookStack\Entities\Models\Page;
+use Illuminate\Database\Eloquent\Relations\Relation;
+
+class ReferenceController extends Controller
+{
+
+ protected PermissionApplicator $permissions;
+
+ public function __construct(PermissionApplicator $permissions)
+ {
+ $this->permissions = $permissions;
+ }
+
+ /**
+ * Display the references to a given page.
+ */
+ public function page(string $bookSlug, string $pageSlug)
+ {
+ /** @var Page $page */
+ $page = Page::visible()->whereSlugs($bookSlug, $pageSlug)->firstOrFail();
+
+ $baseQuery = $page->referencesTo()
+ ->where('from_type', '=', (new Page())->getMorphClass())
+ ->with([
+ 'from' => fn(Relation $query) => $query->select(Page::$listAttributes),
+ 'from.book' => fn(Relation $query) => $query->scopes('visible'),
+ 'from.chapter' => fn(Relation $query) => $query->scopes('visible')
+ ]);
+
+ $references = $this->permissions->restrictEntityRelationQuery(
+ $baseQuery,
+ 'references',
+ 'from_id',
+ 'from_type'
+ )->get();
+
+ return view('pages.references', [
+ 'page' => $page,
+ 'references' => $references,
+ ]);
+ }
+}