BookStack/app/Entities/Repos/RevisionRepo.php

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<?php
namespace BookStack\Entities\Repos;
use BookStack\Entities\Models\Page;
use BookStack\Entities\Models\PageRevision;
use Illuminate\Database\Eloquent\Builder;
class RevisionRepo
{
/**
* Get a revision by its stored book and page slug values.
*/
public function getBySlugs(string $bookSlug, string $pageSlug): ?PageRevision
{
/** @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;
}
/**
* Get the latest draft revision, for the given page, belonging to the current user.
*/
public function getLatestDraftForCurrentUser(Page $page): ?PageRevision
{
/** @var ?PageRevision $revision */
$revision = $this->queryForCurrentUserDraft($page->id)->first();
return $revision;
}
/**
* Delete all drafts revisions, for the given page, belonging to the current user.
*/
public function deleteDraftsForCurrentUser(Page $page): void
{
$this->queryForCurrentUserDraft($page->id)->delete();
}
/**
* Get a user update_draft page revision to update for the given page.
* Checks for an existing revisions before providing a fresh one.
*/
public function getNewDraftForCurrentUser(Page $page): PageRevision
{
$draft = $this->getLatestDraftForCurrentUser($page);
if ($draft) {
return $draft;
}
$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;
}
/**
* Store a new revision in the system for the given page.
*/
public function storeNewForPage(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;
}
/**
* 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();
}
}
/**
* Query update draft revisions for the current user.
*/
protected function queryForCurrentUserDraft(int $pageId): Builder
{
return PageRevision::query()
->where('created_by', '=', user()->id)
->where('type', 'update_draft')
->where('page_id', '=', $pageId)
->orderBy('created_at', 'desc');
}
}