405 lines
11 KiB
PHP
405 lines
11 KiB
PHP
<?php
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namespace BookStack\Entities\Tools;
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use BookStack\Entities\EntityProvider;
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use BookStack\Entities\Models\Book;
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use BookStack\Entities\Models\Bookshelf;
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use BookStack\Entities\Models\Chapter;
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use BookStack\Entities\Models\Deletion;
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use BookStack\Entities\Models\Entity;
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use BookStack\Entities\Models\HasCoverImage;
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use BookStack\Entities\Models\Page;
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use BookStack\Entities\Queries\EntityQueries;
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use BookStack\Exceptions\NotifyException;
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use BookStack\Facades\Activity;
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use BookStack\Uploads\AttachmentService;
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use BookStack\Uploads\ImageService;
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use Exception;
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use Illuminate\Database\Eloquent\Builder;
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use Illuminate\Support\Carbon;
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class TrashCan
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{
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public function __construct(
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protected EntityQueries $queries,
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) {
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}
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/**
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* Send a shelf to the recycle bin.
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*
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* @throws NotifyException
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*/
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public function softDestroyShelf(Bookshelf $shelf)
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{
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$this->ensureDeletable($shelf);
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Deletion::createForEntity($shelf);
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$shelf->delete();
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}
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/**
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* Send a book to the recycle bin.
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*
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* @throws Exception
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*/
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public function softDestroyBook(Book $book)
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{
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$this->ensureDeletable($book);
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Deletion::createForEntity($book);
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foreach ($book->pages as $page) {
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$this->softDestroyPage($page, false);
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}
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foreach ($book->chapters as $chapter) {
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$this->softDestroyChapter($chapter, false);
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}
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$book->delete();
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}
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/**
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* Send a chapter to the recycle bin.
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*
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* @throws Exception
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*/
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public function softDestroyChapter(Chapter $chapter, bool $recordDelete = true)
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{
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if ($recordDelete) {
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$this->ensureDeletable($chapter);
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Deletion::createForEntity($chapter);
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}
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if (count($chapter->pages) > 0) {
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foreach ($chapter->pages as $page) {
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$this->softDestroyPage($page, false);
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}
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}
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$chapter->delete();
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}
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/**
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* Send a page to the recycle bin.
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*
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* @throws Exception
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*/
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public function softDestroyPage(Page $page, bool $recordDelete = true)
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{
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if ($recordDelete) {
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$this->ensureDeletable($page);
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Deletion::createForEntity($page);
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}
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$page->delete();
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}
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/**
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* Ensure the given entity is deletable.
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* Is not for permissions, but logical conditions within the application.
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* Will throw if not deletable.
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*
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* @throws NotifyException
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*/
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protected function ensureDeletable(Entity $entity): void
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{
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$customHomeId = intval(explode(':', setting('app-homepage', '0:'))[0]);
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$customHomeActive = setting('app-homepage-type') === 'page';
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$removeCustomHome = false;
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// Check custom homepage usage for pages
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if ($entity instanceof Page && $entity->id === $customHomeId) {
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if ($customHomeActive) {
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throw new NotifyException(trans('errors.page_custom_home_deletion'), $entity->getUrl());
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}
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$removeCustomHome = true;
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}
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// Check custom homepage usage within chapters or books
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if ($entity instanceof Chapter || $entity instanceof Book) {
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if ($entity->pages()->where('id', '=', $customHomeId)->exists()) {
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if ($customHomeActive) {
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throw new NotifyException(trans('errors.page_custom_home_deletion'), $entity->getUrl());
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}
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$removeCustomHome = true;
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}
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}
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if ($removeCustomHome) {
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setting()->remove('app-homepage');
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}
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}
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/**
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* Remove a bookshelf from the system.
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*
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* @throws Exception
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*/
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protected function destroyShelf(Bookshelf $shelf): int
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{
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$this->destroyCommonRelations($shelf);
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$shelf->forceDelete();
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return 1;
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}
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/**
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* Remove a book from the system.
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* Destroys any child chapters and pages.
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*
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* @throws Exception
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*/
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protected function destroyBook(Book $book): int
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{
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$count = 0;
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$pages = $book->pages()->withTrashed()->get();
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foreach ($pages as $page) {
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$this->destroyPage($page);
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$count++;
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}
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$chapters = $book->chapters()->withTrashed()->get();
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foreach ($chapters as $chapter) {
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$this->destroyChapter($chapter);
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$count++;
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}
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$this->destroyCommonRelations($book);
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$book->forceDelete();
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return $count + 1;
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}
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/**
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* Remove a chapter from the system.
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* Destroys all pages within.
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*
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* @throws Exception
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*/
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protected function destroyChapter(Chapter $chapter): int
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{
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$count = 0;
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$pages = $chapter->pages()->withTrashed()->get();
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foreach ($pages as $page) {
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$this->destroyPage($page);
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$count++;
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}
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$this->destroyCommonRelations($chapter);
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$chapter->forceDelete();
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return $count + 1;
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}
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/**
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* Remove a page from the system.
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*
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* @throws Exception
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*/
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protected function destroyPage(Page $page): int
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{
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$this->destroyCommonRelations($page);
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$page->allRevisions()->delete();
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// Delete Attached Files
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$attachmentService = app()->make(AttachmentService::class);
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foreach ($page->attachments as $attachment) {
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$attachmentService->deleteFile($attachment);
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}
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// Remove book template usages
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$this->queries->books->start()
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->where('default_template_id', '=', $page->id)
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->update(['default_template_id' => null]);
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// Remove chapter template usages
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$this->queries->chapters->start()
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->where('default_template_id', '=', $page->id)
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->update(['default_template_id' => null]);
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$page->forceDelete();
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return 1;
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}
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/**
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* Get the total counts of those that have been trashed
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* but not yet fully deleted (In recycle bin).
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*/
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public function getTrashedCounts(): array
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{
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$counts = [];
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foreach ((new EntityProvider())->all() as $key => $instance) {
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/** @var Builder<Entity> $query */
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$query = $instance->newQuery();
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$counts[$key] = $query->onlyTrashed()->count();
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}
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return $counts;
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}
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/**
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* Destroy all items that have pending deletions.
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*
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* @throws Exception
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*/
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public function empty(): int
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{
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$deletions = Deletion::all();
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$deleteCount = 0;
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foreach ($deletions as $deletion) {
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$deleteCount += $this->destroyFromDeletion($deletion);
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}
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return $deleteCount;
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}
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/**
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* Destroy an element from the given deletion model.
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*
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* @throws Exception
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*/
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public function destroyFromDeletion(Deletion $deletion): int
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{
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// We directly load the deletable element here just to ensure it still
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// exists in the event it has already been destroyed during this request.
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$entity = $deletion->deletable()->first();
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$count = 0;
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if ($entity) {
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$count = $this->destroyEntity($deletion->deletable);
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}
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$deletion->delete();
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return $count;
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}
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/**
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* Restore the content within the given deletion.
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*
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* @throws Exception
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*/
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public function restoreFromDeletion(Deletion $deletion): int
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{
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$shouldRestore = true;
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$restoreCount = 0;
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if ($deletion->deletable instanceof Entity) {
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$parent = $deletion->deletable->getParent();
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if ($parent && $parent->trashed()) {
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$shouldRestore = false;
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}
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}
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if ($deletion->deletable instanceof Entity && $shouldRestore) {
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$restoreCount = $this->restoreEntity($deletion->deletable);
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}
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$deletion->delete();
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return $restoreCount;
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}
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/**
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* Automatically clear old content from the recycle bin
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* depending on the configured lifetime.
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* Returns the total number of deleted elements.
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*
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* @throws Exception
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*/
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public function autoClearOld(): int
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{
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$lifetime = intval(config('app.recycle_bin_lifetime'));
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if ($lifetime < 0) {
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return 0;
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}
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$clearBeforeDate = Carbon::now()->addSeconds(10)->subDays($lifetime);
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$deleteCount = 0;
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$deletionsToRemove = Deletion::query()->where('created_at', '<', $clearBeforeDate)->get();
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foreach ($deletionsToRemove as $deletion) {
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$deleteCount += $this->destroyFromDeletion($deletion);
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}
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return $deleteCount;
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}
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/**
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* Restore an entity so it is essentially un-deleted.
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* Deletions on restored child elements will be removed during this restoration.
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*/
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protected function restoreEntity(Entity $entity): int
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{
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$count = 1;
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$entity->restore();
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$restoreAction = function ($entity) use (&$count) {
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if ($entity->deletions_count > 0) {
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$entity->deletions()->delete();
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}
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$entity->restore();
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$count++;
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};
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if ($entity instanceof Chapter || $entity instanceof Book) {
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$entity->pages()->withTrashed()->withCount('deletions')->get()->each($restoreAction);
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}
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if ($entity instanceof Book) {
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$entity->chapters()->withTrashed()->withCount('deletions')->get()->each($restoreAction);
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}
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return $count;
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}
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/**
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* Destroy the given entity.
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*
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* @throws Exception
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*/
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public function destroyEntity(Entity $entity): int
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{
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if ($entity instanceof Page) {
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return $this->destroyPage($entity);
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}
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if ($entity instanceof Chapter) {
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return $this->destroyChapter($entity);
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}
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if ($entity instanceof Book) {
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return $this->destroyBook($entity);
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}
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if ($entity instanceof Bookshelf) {
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return $this->destroyShelf($entity);
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}
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return 0;
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}
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/**
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* Update entity relations to remove or update outstanding connections.
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*/
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protected function destroyCommonRelations(Entity $entity)
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{
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Activity::removeEntity($entity);
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$entity->views()->delete();
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$entity->permissions()->delete();
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$entity->tags()->delete();
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$entity->comments()->delete();
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$entity->jointPermissions()->delete();
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$entity->searchTerms()->delete();
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$entity->deletions()->delete();
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$entity->favourites()->delete();
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$entity->watches()->delete();
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$entity->referencesTo()->delete();
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$entity->referencesFrom()->delete();
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if ($entity instanceof HasCoverImage && $entity->cover()->exists()) {
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$imageService = app()->make(ImageService::class);
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$imageService->destroy($entity->cover()->first());
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}
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}
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}
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