Got the tree view working

app/Repos/BookRepo.php

@@ -53,4 +53,11 @@ class BookRepo
         $book->delete();
     }
 
+    public function getTree($book)
+    {
+        $tree = $book->toArray();
+        $tree['pages'] = $this->pageRepo->getTreeByBookId($book->id);
+        return $tree;
+    }
+
 }

app/Repos/PageRepo.php

@@ -59,4 +59,62 @@ class PageRepo
         return $query->get();
     }
 
+    public function getBreadCrumbs($page)
+    {
+        $tree = [];
+        $cPage = $page;
+        while($cPage->parent && $cPage->parent->id !== 0) {
+            $cPage = $cPage->parent;
+            $tree[] = $cPage;
+        }
+        return count($tree) > 0 ? array_reverse($tree) : false;
+    }
+
+    /**
+     * Creates a tree of child pages, Nested by their
+     * set parent pages.
+     * @param $bookId
+     * @param bool $currentPageId
+     * @return array
+     */
+    public function getTreeByBookId($bookId, $currentPageId = false)
+    {
+        $topLevelPages = $this->getTopLevelPages($bookId);
+        $pageTree = [];
+
+        foreach($topLevelPages as $key => $topPage) {
+            $pageTree[$key] = $this->toArrayTree($topPage, $currentPageId);
+        }
+
+        return $pageTree;
+    }
+
+    /**
+     * Creates a page tree array with the supplied page
+     * as the parent of the tree.
+     * @param $page
+     * @param bool $currentPageId
+     * @return mixed
+     */
+    private function toArrayTree($page, $currentPageId = false)
+    {
+        $cPage = $page->toSimpleArray();
+        $cPage['current'] = ($currentPageId !== false && $cPage['id'] === $currentPageId);
+        $cPage['pages'] = [];
+        foreach($page->children as $key => $childPage) {
+            $cPage['pages'][$key] = $this->toArrayTree($childPage);
+        }
+        $cPage['hasChildren'] = count($cPage['pages']) > 0;
+        return $cPage;
+    }
+
+    /**
+     * Gets the pages at the top of the page hierarchy.
+     * @param $bookId
+     */
+    private function getTopLevelPages($bookId)
+    {
+        return $this->page->where('book_id', '=', $bookId)->where('page_id', '=', 0)->get();
+    }
+
 }