BookStack/app/Repos/ChapterRepo.php

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<?php namespace BookStack\Repos;
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use Activity;
use BookStack\Book;
use BookStack\Exceptions\NotFoundException;
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use Illuminate\Support\Str;
use BookStack\Chapter;
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class ChapterRepo extends EntityRepo
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{
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protected $pageRepo;
/**
* ChapterRepo constructor.
* @param $pageRepo
*/
public function __construct(PageRepo $pageRepo)
{
$this->pageRepo = $pageRepo;
parent::__construct();
}
/**
* Base query for getting chapters, Takes permissions into account.
* @return mixed
*/
private function chapterQuery()
{
return $this->permissionService->enforceChapterRestrictions($this->chapter, 'view');
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}
/**
* Check if an id exists.
* @param $id
* @return bool
*/
public function idExists($id)
{
return $this->chapterQuery()->where('id', '=', $id)->count() > 0;
}
/**
* Get a chapter by a specific id.
* @param $id
* @return mixed
*/
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public function getById($id)
{
return $this->chapterQuery()->findOrFail($id);
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}
/**
* Get all chapters.
* @return \Illuminate\Database\Eloquent\Collection|static[]
*/
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public function getAll()
{
return $this->chapterQuery()->all();
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}
/**
* Get a chapter that has the given slug within the given book.
* @param $slug
* @param $bookId
* @return mixed
* @throws NotFoundException
*/
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public function getBySlug($slug, $bookId)
{
$chapter = $this->chapterQuery()->where('slug', '=', $slug)->where('book_id', '=', $bookId)->first();
if ($chapter === null) throw new NotFoundException('Chapter not found');
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return $chapter;
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}
/**
* Get the child items for a chapter
* @param Chapter $chapter
*/
public function getChildren(Chapter $chapter)
{
$pages = $this->permissionService->enforcePageRestrictions($chapter->pages())->get();
// Sort items with drafts first then by priority.
return $pages->sortBy(function ($child, $key) {
$score = $child->priority;
if ($child->draft) $score -= 100;
return $score;
});
}
/**
* Create a new chapter from request input.
* @param $input
* @param Book $book
* @return Chapter
*/
public function createFromInput($input, Book $book)
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{
$chapter = $this->chapter->newInstance($input);
$chapter->slug = $this->findSuitableSlug($chapter->name, $book->id);
$chapter->created_by = auth()->user()->id;
$chapter->updated_by = auth()->user()->id;
$chapter = $book->chapters()->save($chapter);
$this->permissionService->buildJointPermissionsForEntity($chapter);
return $chapter;
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}
/**
* Destroy a chapter and its relations by providing its slug.
* @param Chapter $chapter
*/
public function destroy(Chapter $chapter)
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{
if (count($chapter->pages) > 0) {
foreach ($chapter->pages as $page) {
$page->chapter_id = 0;
$page->save();
}
}
Activity::removeEntity($chapter);
$chapter->views()->delete();
$chapter->permissions()->delete();
$this->permissionService->deleteJointPermissionsForEntity($chapter);
$chapter->delete();
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}
/**
* Check if a chapter's slug exists.
* @param $slug
* @param $bookId
* @param bool|false $currentId
* @return bool
*/
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public function doesSlugExist($slug, $bookId, $currentId = false)
{
$query = $this->chapter->where('slug', '=', $slug)->where('book_id', '=', $bookId);
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if ($currentId) {
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$query = $query->where('id', '!=', $currentId);
}
return $query->count() > 0;
}
/**
* Finds a suitable slug for the provided name.
* Checks database to prevent duplicate slugs.
* @param $name
* @param $bookId
* @param bool|false $currentId
* @return string
*/
public function findSuitableSlug($name, $bookId, $currentId = false)
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{
$slug = Str::slug($name);
if ($slug === "") $slug = substr(md5(rand(1, 500)), 0, 5);
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while ($this->doesSlugExist($slug, $bookId, $currentId)) {
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$slug .= '-' . substr(md5(rand(1, 500)), 0, 3);
}
return $slug;
}
/**
* Get a new priority value for a new page to be added
* to the given chapter.
* @param Chapter $chapter
* @return int
*/
public function getNewPriority(Chapter $chapter)
{
$lastPage = $chapter->pages->last();
return $lastPage !== null ? $lastPage->priority + 1 : 0;
}
/**
* Get chapters by the given search term.
* @param string $term
* @param array $whereTerms
* @param int $count
* @param array $paginationAppends
* @return mixed
*/
public function getBySearch($term, $whereTerms = [], $count = 20, $paginationAppends = [])
{
$terms = $this->prepareSearchTerms($term);
$chapterQuery = $this->permissionService->enforceChapterRestrictions($this->chapter->fullTextSearchQuery(['name', 'description'], $terms, $whereTerms));
$chapterQuery = $this->addAdvancedSearchQueries($chapterQuery, $term);
$chapters = $chapterQuery->paginate($count)->appends($paginationAppends);
$words = join('|', explode(' ', preg_quote(trim($term), '/')));
foreach ($chapters as $chapter) {
//highlight
$result = preg_replace('#' . $words . '#iu', "<span class=\"highlight\">\$0</span>", $chapter->getExcerpt(100));
$chapter->searchSnippet = $result;
}
return $chapters;
}
/**
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* Changes the book relation of this chapter.
* @param $bookId
* @param Chapter $chapter
* @return Chapter
*/
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public function changeBook($bookId, Chapter $chapter)
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{
$chapter->book_id = $bookId;
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// Update related activity
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foreach ($chapter->activity as $activity) {
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$activity->book_id = $bookId;
$activity->save();
}
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$chapter->slug = $this->findSuitableSlug($chapter->name, $bookId, $chapter->id);
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$chapter->save();
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// Update all child pages
foreach ($chapter->pages as $page) {
$this->pageRepo->changeBook($bookId, $page);
}
// Update permissions
$chapter->load('book');
$this->permissionService->buildJointPermissionsForEntity($chapter->book);
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return $chapter;
}
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}