Played around with a new app structure

app/References/ReferenceController.php

@@ -0,0 +1,75 @@
+<?php
+
+namespace BookStack\References;
+
+use BookStack\Entities\Models\Book;
+use BookStack\Entities\Models\Bookshelf;
+use BookStack\Entities\Models\Chapter;
+use BookStack\Entities\Models\Page;
+use BookStack\Http\Controllers\Controller;
+
+class ReferenceController extends Controller
+{
+    protected ReferenceFetcher $referenceFetcher;
+
+    public function __construct(ReferenceFetcher $referenceFetcher)
+    {
+        $this->referenceFetcher = $referenceFetcher;
+    }
+
+    /**
+     * Display the references to a given page.
+     */
+    public function page(string $bookSlug, string $pageSlug)
+    {
+        $page = Page::getBySlugs($bookSlug, $pageSlug);
+        $references = $this->referenceFetcher->getPageReferencesToEntity($page);
+
+        return view('pages.references', [
+            'page'       => $page,
+            'references' => $references,
+        ]);
+    }
+
+    /**
+     * Display the references to a given chapter.
+     */
+    public function chapter(string $bookSlug, string $chapterSlug)
+    {
+        $chapter = Chapter::getBySlugs($bookSlug, $chapterSlug);
+        $references = $this->referenceFetcher->getPageReferencesToEntity($chapter);
+
+        return view('chapters.references', [
+            'chapter'    => $chapter,
+            'references' => $references,
+        ]);
+    }
+
+    /**
+     * Display the references to a given book.
+     */
+    public function book(string $slug)
+    {
+        $book = Book::getBySlug($slug);
+        $references = $this->referenceFetcher->getPageReferencesToEntity($book);
+
+        return view('books.references', [
+            'book'       => $book,
+            'references' => $references,
+        ]);
+    }
+
+    /**
+     * Display the references to a given shelf.
+     */
+    public function shelf(string $slug)
+    {
+        $shelf = Bookshelf::getBySlug($slug);
+        $references = $this->referenceFetcher->getPageReferencesToEntity($shelf);
+
+        return view('shelves.references', [
+            'shelf'      => $shelf,
+            'references' => $references,
+        ]);
+    }
+}