BookStack/app/Repos/PageRepo.php

433 lines
13 KiB
PHP

<?php namespace BookStack\Repos;
use Activity;
use BookStack\Book;
use BookStack\Exceptions\NotFoundException;
use DOMDocument;
use Illuminate\Support\Str;
use BookStack\Page;
use BookStack\PageRevision;
class PageRepo extends EntityRepo
{
protected $pageRevision;
/**
* PageRepo constructor.
* @param PageRevision $pageRevision
*/
public function __construct(PageRevision $pageRevision)
{
$this->pageRevision = $pageRevision;
parent::__construct();
}
/**
* Base query for getting pages, Takes restrictions into account.
* @return mixed
*/
private function pageQuery()
{
return $this->restrictionService->enforcePageRestrictions($this->page, 'view');
}
/**
* Get a page via a specific ID.
* @param $id
* @return mixed
*/
public function getById($id)
{
return $this->pageQuery()->findOrFail($id);
}
/**
* Get a page identified by the given slug.
* @param $slug
* @param $bookId
* @return mixed
* @throws NotFoundException
*/
public function getBySlug($slug, $bookId)
{
$page = $this->pageQuery()->where('slug', '=', $slug)->where('book_id', '=', $bookId)->first();
if ($page === null) throw new NotFoundException('Page not found');
return $page;
}
/**
* Search through page revisions and retrieve
* the last page in the current book that
* has a slug equal to the one given.
* @param $pageSlug
* @param $bookSlug
* @return null | Page
*/
public function findPageUsingOldSlug($pageSlug, $bookSlug)
{
$revision = $this->pageRevision->where('slug', '=', $pageSlug)
->whereHas('page', function ($query) {
$this->restrictionService->enforcePageRestrictions($query);
})
->where('type', '=', 'version')
->where('book_slug', '=', $bookSlug)->orderBy('created_at', 'desc')
->with('page')->first();
return $revision !== null ? $revision->page : null;
}
/**
* Get a new Page instance from the given input.
* @param $input
* @return Page
*/
public function newFromInput($input)
{
$page = $this->page->fill($input);
return $page;
}
/**
* Count the pages with a particular slug within a book.
* @param $slug
* @param $bookId
* @return mixed
*/
public function countBySlug($slug, $bookId)
{
return $this->page->where('slug', '=', $slug)->where('book_id', '=', $bookId)->count();
}
/**
* Save a new page into the system.
* Input validation must be done beforehand.
* @param array $input
* @param Book $book
* @param int $chapterId
* @return Page
*/
public function saveNew(array $input, Book $book, $chapterId = null)
{
$page = $this->newFromInput($input);
$page->slug = $this->findSuitableSlug($page->name, $book->id);
if ($chapterId) $page->chapter_id = $chapterId;
$page->html = $this->formatHtml($input['html']);
$page->text = strip_tags($page->html);
$page->created_by = auth()->user()->id;
$page->updated_by = auth()->user()->id;
$book->pages()->save($page);
return $page;
}
/**
* Formats a page's html to be tagged correctly
* within the system.
* @param string $htmlText
* @return string
*/
protected function formatHtml($htmlText)
{
if ($htmlText == '') return $htmlText;
libxml_use_internal_errors(true);
$doc = new DOMDocument();
$doc->loadHTML(mb_convert_encoding($htmlText, 'HTML-ENTITIES', 'UTF-8'));
$container = $doc->documentElement;
$body = $container->childNodes->item(0);
$childNodes = $body->childNodes;
// Ensure no duplicate ids are used
$idArray = [];
foreach ($childNodes as $index => $childNode) {
/** @var \DOMElement $childNode */
if (get_class($childNode) !== 'DOMElement') continue;
// Overwrite id if not a BookStack custom id
if ($childNode->hasAttribute('id')) {
$id = $childNode->getAttribute('id');
if (strpos($id, 'bkmrk') === 0 && array_search($id, $idArray) === false) {
$idArray[] = $id;
continue;
};
}
// Create an unique id for the element
// Uses the content as a basis to ensure output is the same every time
// the same content is passed through.
$contentId = 'bkmrk-' . substr(strtolower(preg_replace('/\s+/', '-', trim($childNode->nodeValue))), 0, 20);
$newId = urlencode($contentId);
$loopIndex = 0;
while (in_array($newId, $idArray)) {
$newId = urlencode($contentId . '-' . $loopIndex);
$loopIndex++;
}
$childNode->setAttribute('id', $newId);
$idArray[] = $newId;
}
// Generate inner html as a string
$html = '';
foreach ($childNodes as $childNode) {
$html .= $doc->saveHTML($childNode);
}
return $html;
}
/**
* Gets pages by a search term.
* Highlights page content for showing in results.
* @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);
$pages = $this->restrictionService->enforcePageRestrictions($this->page->fullTextSearchQuery(['name', 'text'], $terms, $whereTerms))
->paginate($count)->appends($paginationAppends);
// Add highlights to page text.
$words = join('|', explode(' ', preg_quote(trim($term), '/')));
//lookahead/behind assertions ensures cut between words
$s = '\s\x00-/:-@\[-`{-~'; //character set for start/end of words
foreach ($pages as $page) {
preg_match_all('#(?<=[' . $s . ']).{1,30}((' . $words . ').{1,30})+(?=[' . $s . '])#uis', $page->text, $matches, PREG_SET_ORDER);
//delimiter between occurrences
$results = [];
foreach ($matches as $line) {
$results[] = htmlspecialchars($line[0], 0, 'UTF-8');
}
$matchLimit = 6;
if (count($results) > $matchLimit) {
$results = array_slice($results, 0, $matchLimit);
}
$result = join('... ', $results);
//highlight
$result = preg_replace('#' . $words . '#iu', "<span class=\"highlight\">\$0</span>", $result);
if (strlen($result) < 5) {
$result = $page->getExcerpt(80);
}
$page->searchSnippet = $result;
}
return $pages;
}
/**
* Search for image usage.
* @param $imageString
* @return mixed
*/
public function searchForImage($imageString)
{
$pages = $this->pageQuery()->where('html', 'like', '%' . $imageString . '%')->get();
foreach ($pages as $page) {
$page->url = $page->getUrl();
$page->html = '';
$page->text = '';
}
return count($pages) > 0 ? $pages : false;
}
/**
* Updates a page with any fillable data and saves it into the database.
* @param Page $page
* @param int $book_id
* @param string $input
* @return Page
*/
public function updatePage(Page $page, $book_id, $input)
{
// Save a revision before updating
if ($page->html !== $input['html'] || $page->name !== $input['name']) {
$this->saveRevision($page);
}
// Prevent slug being updated if no name change
if ($page->name !== $input['name']) {
$page->slug = $this->findSuitableSlug($input['name'], $book_id, $page->id);
}
// Update with new details
$page->fill($input);
$page->html = $this->formatHtml($input['html']);
$page->text = strip_tags($page->html);
$page->updated_by = auth()->user()->id;
$page->save();
return $page;
}
/**
* Restores a revision's content back into a page.
* @param Page $page
* @param Book $book
* @param int $revisionId
* @return Page
*/
public function restoreRevision(Page $page, Book $book, $revisionId)
{
$this->saveRevision($page);
$revision = $this->getRevisionById($revisionId);
$page->fill($revision->toArray());
$page->slug = $this->findSuitableSlug($page->name, $book->id, $page->id);
$page->text = strip_tags($page->html);
$page->updated_by = auth()->user()->id;
$page->save();
return $page;
}
/**
* Saves a page revision into the system.
* @param Page $page
* @return $this
*/
public function saveRevision(Page $page)
{
$revision = $this->pageRevision->fill($page->toArray());
$revision->page_id = $page->id;
$revision->slug = $page->slug;
$revision->book_slug = $page->book->slug;
$revision->created_by = auth()->user()->id;
$revision->created_at = $page->updated_at;
$revision->type = 'version';
$revision->save();
// Clear old revisions
if ($this->pageRevision->where('page_id', '=', $page->id)->count() > 50) {
$this->pageRevision->where('page_id', '=', $page->id)
->orderBy('created_at', 'desc')->skip(50)->take(5)->delete();
}
return $revision;
}
/**
* Save a page update draft.
* @param Page $page
* @param array $data
* @return PageRevision
*/
public function saveUpdateDraft(Page $page, $data = [])
{
$userId = auth()->user()->id;
$drafts = $this->pageRevision->where('created_by', '=', $userId)
->where('type', 'update_draft')
->where('page_id', '=', $page->id)
->orderBy('created_at', 'desc')->get();
if ($drafts->count() > 0) {
$draft = $drafts->first();
} else {
$draft = $this->pageRevision->newInstance();
$draft->page_id = $page->id;
$draft->slug = $page->slug;
$draft->book_slug = $page->book->slug;
$draft->created_by = $userId;
$draft->type = 'update_draft';
}
$draft->fill($data);
$draft->save();
return $draft;
}
/**
* Gets a single revision via it's id.
* @param $id
* @return mixed
*/
public function getRevisionById($id)
{
return $this->pageRevision->findOrFail($id);
}
/**
* Checks if a slug exists within a book already.
* @param $slug
* @param $bookId
* @param bool|false $currentId
* @return bool
*/
public function doesSlugExist($slug, $bookId, $currentId = false)
{
$query = $this->page->where('slug', '=', $slug)->where('book_id', '=', $bookId);
if ($currentId) $query = $query->where('id', '!=', $currentId);
return $query->count() > 0;
}
/**
* Changes the related book for the specified page.
* Changes the book id of any relations to the page that store the book id.
* @param int $bookId
* @param Page $page
* @return Page
*/
public function changeBook($bookId, Page $page)
{
$page->book_id = $bookId;
foreach ($page->activity as $activity) {
$activity->book_id = $bookId;
$activity->save();
}
$page->slug = $this->findSuitableSlug($page->name, $bookId, $page->id);
$page->save();
return $page;
}
/**
* Gets a suitable slug for the resource
* @param $name
* @param $bookId
* @param bool|false $currentId
* @return string
*/
public function findSuitableSlug($name, $bookId, $currentId = false)
{
$slug = Str::slug($name);
while ($this->doesSlugExist($slug, $bookId, $currentId)) {
$slug .= '-' . substr(md5(rand(1, 500)), 0, 3);
}
return $slug;
}
/**
* Destroy a given page along with its dependencies.
* @param $page
*/
public function destroy($page)
{
Activity::removeEntity($page);
$page->views()->delete();
$page->revisions()->delete();
$page->restrictions()->delete();
$page->delete();
}
/**
* Get the latest pages added to the system.
* @param $count
*/
public function getRecentlyCreatedPaginated($count = 20)
{
return $this->pageQuery()->orderBy('created_at', 'desc')->paginate($count);
}
/**
* Get the latest pages added to the system.
* @param $count
*/
public function getRecentlyUpdatedPaginated($count = 20)
{
return $this->pageQuery()->orderBy('updated_at', 'desc')->paginate($count);
}
}