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<?php
namespace BookStack\Entities\Repos;
use BookStack\Actions\ActivityType;
use BookStack\Entities\Models\Book;
use BookStack\Entities\Models\Chapter;
use BookStack\Entities\Models\Entity;
use BookStack\Entities\Models\Page;
use BookStack\Entities\Models\PageRevision;
use BookStack\Entities\Tools\BookContents;
use BookStack\Entities\Tools\PageContent;
use BookStack\Entities\Tools\PageEditorData;
use BookStack\Entities\Tools\TrashCan;
use BookStack\Exceptions\MoveOperationException;
use BookStack\Exceptions\NotFoundException;
use BookStack\Exceptions\PermissionsException;
use BookStack\Facades\Activity;
use Exception;
use Illuminate\Database\Eloquent\Builder;
use Illuminate\Pagination\LengthAwarePaginator;
class PageRepo
{
protected $baseRepo;
/**
* PageRepo constructor.
*/
public function __construct(BaseRepo $baseRepo)
{
$this->baseRepo = $baseRepo;
}
/**
* Get a page by ID.
*
* @throws NotFoundException
*/
public function getById(int $id, array $relations = ['book']): Page
{
$page = Page::visible()->with($relations)->find($id);
if (!$page) {
throw new NotFoundException(trans('errors.page_not_found'));
}
return $page;
}
/**
* Get a page its book and own slug.
*
* @throws NotFoundException
*/
public function getBySlug(string $bookSlug, string $pageSlug): Page
{
$page = Page::visible()->whereSlugs($bookSlug, $pageSlug)->first();
if (!$page) {
throw new NotFoundException(trans('errors.page_not_found'));
}
return $page;
}
/**
* Get a page by its old slug but checking the revisions table
* for the last revision that matched the given page and book slug.
*/
public function getByOldSlug(string $bookSlug, string $pageSlug): ?Page
{
/** @var ?PageRevision $revision */
$revision = PageRevision::query()
->whereHas('page', function (Builder $query) {
$query->scopes('visible');
})
->where('slug', '=', $pageSlug)
->where('type', '=', 'version')
->where('book_slug', '=', $bookSlug)
->orderBy('created_at', 'desc')
->with('page')
->first();
return $revision->page ?? null;
}
/**
* Get pages that have been marked as a template.
*/
public function getTemplates(int $count = 10, int $page = 1, string $search = ''): LengthAwarePaginator
{
$query = Page::visible()
->where('template', '=', true)
->orderBy('name', 'asc')
->skip(($page - 1) * $count)
->take($count);
if ($search) {
$query->where('name', 'like', '%' . $search . '%');
}
$paginator = $query->paginate($count, ['*'], 'page', $page);
$paginator->withPath('/templates');
return $paginator;
}
/**
* Get a parent item via slugs.
*/
public function getParentFromSlugs(string $bookSlug, string $chapterSlug = null): Entity
{
if ($chapterSlug !== null) {
return $chapter = Chapter::visible()->whereSlugs($bookSlug, $chapterSlug)->firstOrFail();
}
return Book::visible()->where('slug', '=', $bookSlug)->firstOrFail();
}
/**
* Get the draft copy of the given page for the current user.
*/
public function getUserDraft(Page $page): ?PageRevision
{
$revision = $this->getUserDraftQuery($page)->first();
return $revision;
}
/**
* Get a new draft page belonging to the given parent entity.
*/
public function getNewDraftPage(Entity $parent)
{
$page = (new Page())->forceFill([
'name' => trans('entities.pages_initial_name'),
'created_by' => user()->id,
'owned_by' => user()->id,
'updated_by' => user()->id,
'draft' => true,
]);
if ($parent instanceof Chapter) {
$page->chapter_id = $parent->id;
$page->book_id = $parent->book_id;
} else {
$page->book_id = $parent->id;
}
$page->save();
$page->refresh()->rebuildPermissions();
return $page;
}
/**
* Publish a draft page to make it a live, non-draft page.
*/
public function publishDraft(Page $draft, array $input): Page
{
$this->updateTemplateStatusAndContentFromInput($draft, $input);
$this->baseRepo->update($draft, $input);
$draft->draft = false;
$draft->revision_count = 1;
$draft->priority = $this->getNewPriority($draft);
$draft->refreshSlug();
$draft->save();
$this->savePageRevision($draft, trans('entities.pages_initial_revision'));
$draft->indexForSearch();
$draft->refresh();
Activity::add(ActivityType::PAGE_CREATE, $draft);
return $draft;
}
/**
* Update a page in the system.
*/
public function update(Page $page, array $input): Page
{
// Hold the old details to compare later
$oldHtml = $page->html;
$oldName = $page->name;
$oldMarkdown = $page->markdown;
$this->updateTemplateStatusAndContentFromInput($page, $input);
$this->baseRepo->update($page, $input);
// Update with new details
$page->revision_count++;
$page->save();
// Remove all update drafts for this user & page.
$this->getUserDraftQuery($page)->delete();
// Save a revision after updating
$summary = trim($input['summary'] ?? '');
$htmlChanged = isset($input['html']) && $input['html'] !== $oldHtml;
$nameChanged = isset($input['name']) && $input['name'] !== $oldName;
$markdownChanged = isset($input['markdown']) && $input['markdown'] !== $oldMarkdown;
if ($htmlChanged || $nameChanged || $markdownChanged || $summary) {
$this->savePageRevision($page, $summary);
}
Activity::add(ActivityType::PAGE_UPDATE, $page);
return $page;
}
protected function updateTemplateStatusAndContentFromInput(Page $page, array $input)
{
if (isset($input['template']) && userCan('templates-manage')) {
$page->template = ($input['template'] === 'true');
}
$pageContent = new PageContent($page);
$currentEditor = $page->editor ?: PageEditorData::getSystemDefaultEditor();
$newEditor = $currentEditor;
$haveInput = isset($input['markdown']) || isset($input['html']);
$inputEmpty = empty($input['markdown']) && empty($input['html']);
if ($haveInput && $inputEmpty) {
$pageContent->setNewHTML('');
} elseif (!empty($input['markdown']) && is_string($input['markdown'])) {
$newEditor = 'markdown';
$pageContent->setNewMarkdown($input['markdown']);
} elseif (isset($input['html'])) {
$newEditor = 'wysiwyg';
$pageContent->setNewHTML($input['html']);
}
if ($newEditor !== $currentEditor && userCan('editor-change')) {
$page->editor = $newEditor;
}
}
/**
* Saves a page revision into the system.
*/
protected function savePageRevision(Page $page, string $summary = null): PageRevision
{
$revision = new PageRevision();
$revision->name = $page->name;
$revision->html = $page->html;
$revision->markdown = $page->markdown;
$revision->text = $page->text;
$revision->page_id = $page->id;
$revision->slug = $page->slug;
$revision->book_slug = $page->book->slug;
$revision->created_by = user()->id;
$revision->created_at = $page->updated_at;
$revision->type = 'version';
$revision->summary = $summary;
$revision->revision_number = $page->revision_count;
$revision->save();
$this->deleteOldRevisions($page);
return $revision;
}
/**
* Save a page update draft.
*/
public function updatePageDraft(Page $page, array $input)
{
// If the page itself is a draft simply update that
if ($page->draft) {
$this->updateTemplateStatusAndContentFromInput($page, $input);
$page->fill($input);
$page->save();
return $page;
}
// Otherwise, save the data to a revision
$draft = $this->getPageRevisionToUpdate($page);
$draft->fill($input);
if (!empty($input['markdown'])) {
$draft->markdown = $input['markdown'];
$draft->html = '';
} else {
$draft->html = $input['html'];
$draft->markdown = '';
}
$draft->save();
return $draft;
}
/**
* Destroy a page from the system.
*
* @throws Exception
*/
public function destroy(Page $page)
{
$trashCan = new TrashCan();
$trashCan->softDestroyPage($page);
Activity::add(ActivityType::PAGE_DELETE, $page);
$trashCan->autoClearOld();
}
/**
* Restores a revision's content back into a page.
*/
public function restoreRevision(Page $page, int $revisionId): Page
{
$page->revision_count++;
/** @var PageRevision $revision */
$revision = $page->revisions()->where('id', '=', $revisionId)->first();
$page->fill($revision->toArray());
$content = new PageContent($page);
if (!empty($revision->markdown)) {
$content->setNewMarkdown($revision->markdown);
} else {
$content->setNewHTML($revision->html);
}
$page->updated_by = user()->id;
$page->refreshSlug();
$page->save();
$page->indexForSearch();
$summary = trans('entities.pages_revision_restored_from', ['id' => strval($revisionId), 'summary' => $revision->summary]);
$this->savePageRevision($page, $summary);
Activity::add(ActivityType::PAGE_RESTORE, $page);
return $page;
}
/**
* Move the given page into a new parent book or chapter.
* The $parentIdentifier must be a string of the following format:
* 'book:<id>' (book:5).
*
* @throws MoveOperationException
* @throws PermissionsException
*/
public function move(Page $page, string $parentIdentifier): Entity
{
$parent = $this->findParentByIdentifier($parentIdentifier);
if (is_null($parent)) {
throw new MoveOperationException('Book or chapter to move page into not found');
}
if (!userCan('page-create', $parent)) {
throw new PermissionsException('User does not have permission to create a page within the new parent');
}
$page->chapter_id = ($parent instanceof Chapter) ? $parent->id : null;
$newBookId = ($parent instanceof Chapter) ? $parent->book->id : $parent->id;
$page->changeBook($newBookId);
$page->rebuildPermissions();
Activity::add(ActivityType::PAGE_MOVE, $page);
return $parent;
}
/**
* Find a page parent entity via an identifier string in the format:
* {type}:{id}
* Example: (book:5).
*
* @throws MoveOperationException
*/
public function findParentByIdentifier(string $identifier): ?Entity
{
$stringExploded = explode(':', $identifier);
$entityType = $stringExploded[0];
$entityId = intval($stringExploded[1]);
if ($entityType !== 'book' && $entityType !== 'chapter') {
throw new MoveOperationException('Pages can only be in books or chapters');
}
$parentClass = $entityType === 'book' ? Book::class : Chapter::class;
return $parentClass::visible()->where('id', '=', $entityId)->first();
}
/**
* Change the page's parent to the given entity.
*/
protected function changeParent(Page $page, Entity $parent)
{
$book = ($parent instanceof Chapter) ? $parent->book : $parent;
$page->chapter_id = ($parent instanceof Chapter) ? $parent->id : 0;
$page->save();
if ($page->book->id !== $book->id) {
$page->changeBook($book->id);
}
$page->load('book');
$book->rebuildPermissions();
}
/**
* Get a page revision to update for the given page.
* Checks for an existing revisions before providing a fresh one.
*/
protected function getPageRevisionToUpdate(Page $page): PageRevision
{
$drafts = $this->getUserDraftQuery($page)->get();
if ($drafts->count() > 0) {
return $drafts->first();
}
$draft = new PageRevision();
$draft->page_id = $page->id;
$draft->slug = $page->slug;
$draft->book_slug = $page->book->slug;
$draft->created_by = user()->id;
$draft->type = 'update_draft';
return $draft;
}
/**
* Delete old revisions, for the given page, from the system.
*/
protected function deleteOldRevisions(Page $page)
{
$revisionLimit = config('app.revision_limit');
if ($revisionLimit === false) {
return;
}
$revisionsToDelete = PageRevision::query()
->where('page_id', '=', $page->id)
->orderBy('created_at', 'desc')
->skip(intval($revisionLimit))
->take(10)
->get(['id']);
if ($revisionsToDelete->count() > 0) {
PageRevision::query()->whereIn('id', $revisionsToDelete->pluck('id'))->delete();
}
}
/**
* Get a new priority for a page.
*/
protected function getNewPriority(Page $page): int
{
$parent = $page->getParent();
if ($parent instanceof Chapter) {
/** @var ?Page $lastPage */
$lastPage = $parent->pages('desc')->first();
return $lastPage ? $lastPage->priority + 1 : 0;
}
return (new BookContents($page->book))->getLastPriority() + 1;
}
/**
* Get the query to find the user's draft copies of the given page.
*/
protected function getUserDraftQuery(Page $page)
{
return PageRevision::query()->where('created_by', '=', user()->id)
->where('type', 'update_draft')
->where('page_id', '=', $page->id)
->orderBy('created_at', 'desc');
}
}