BookStack/app/Repos/PageRepo.php

<?php namespace Oxbow\Repos;


use Illuminate\Support\Str;
use Oxbow\Page;

class PageRepo
{
    protected $page;

    /**
     * PageRepo constructor.
     * @param $page
     */
    public function __construct(Page $page)
    {
        $this->page = $page;
    }

    public function getById($id)
    {
        return $this->page->findOrFail($id);
    }

    public function getAll()
    {
        return $this->page->all();
    }

    public function getBySlug($slug, $bookId)
    {
        return $this->page->where('slug', '=', $slug)->where('book_id', '=', $bookId)->first();
    }

    public function newFromInput($input)
    {
        $page = $this->page->fill($input);
        return $page;
    }

    public function countBySlug($slug, $bookId)
    {
        return $this->page->where('slug', '=', $slug)->where('book_id', '=', $bookId)->count();
    }

    public function destroyById($id)
    {
        $page = $this->getById($id);
        $page->delete();
    }

    public function getBySearch($term)
    {
        $terms = explode(' ', trim($term));
        $query = $this->page;
        foreach($terms as $term) {
            $query = $query->where('text', 'like', '%'.$term.'%');
        }
        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();
    }

}