758 lines
26 KiB
PHP
758 lines
26 KiB
PHP
<?php namespace BookStack\Auth\Permissions;
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use BookStack\Auth\Permissions;
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use BookStack\Auth\Role;
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use BookStack\Entities\Book;
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use BookStack\Entities\Bookshelf;
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use BookStack\Entities\Chapter;
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use BookStack\Entities\Entity;
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use BookStack\Entities\EntityProvider;
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use BookStack\Entities\Page;
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use BookStack\Ownable;
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use Illuminate\Database\Connection;
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use Illuminate\Database\Eloquent\Builder;
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use Illuminate\Database\Query\Builder as QueryBuilder;
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use Illuminate\Support\Collection;
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class PermissionService
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{
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protected $currentAction;
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protected $isAdminUser;
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protected $userRoles = false;
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protected $currentUserModel = false;
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/**
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* @var Connection
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*/
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protected $db;
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/**
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* @var JointPermission
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*/
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protected $jointPermission;
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/**
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* @var Role
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*/
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protected $role;
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/**
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* @var EntityPermission
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*/
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protected $entityPermission;
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/**
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* @var EntityProvider
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*/
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protected $entityProvider;
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protected $entityCache;
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/**
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* PermissionService constructor.
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* @param JointPermission $jointPermission
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* @param EntityPermission $entityPermission
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* @param Role $role
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* @param Connection $db
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* @param EntityProvider $entityProvider
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*/
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public function __construct(
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JointPermission $jointPermission,
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Permissions\EntityPermission $entityPermission,
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Role $role,
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Connection $db,
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EntityProvider $entityProvider
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) {
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$this->db = $db;
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$this->jointPermission = $jointPermission;
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$this->entityPermission = $entityPermission;
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$this->role = $role;
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$this->entityProvider = $entityProvider;
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}
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/**
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* Set the database connection
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* @param Connection $connection
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*/
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public function setConnection(Connection $connection)
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{
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$this->db = $connection;
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}
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/**
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* Prepare the local entity cache and ensure it's empty
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* @param \BookStack\Entities\Entity[] $entities
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*/
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protected function readyEntityCache($entities = [])
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{
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$this->entityCache = [];
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foreach ($entities as $entity) {
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$type = $entity->getType();
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if (!isset($this->entityCache[$type])) {
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$this->entityCache[$type] = collect();
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}
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$this->entityCache[$type]->put($entity->id, $entity);
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}
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}
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/**
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* Get a book via ID, Checks local cache
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* @param $bookId
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* @return Book
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*/
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protected function getBook($bookId)
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{
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if (isset($this->entityCache['book']) && $this->entityCache['book']->has($bookId)) {
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return $this->entityCache['book']->get($bookId);
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}
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$book = $this->entityProvider->book->find($bookId);
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if ($book === null) {
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$book = false;
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}
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return $book;
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}
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/**
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* Get a chapter via ID, Checks local cache
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* @param $chapterId
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* @return \BookStack\Entities\Book
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*/
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protected function getChapter($chapterId)
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{
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if (isset($this->entityCache['chapter']) && $this->entityCache['chapter']->has($chapterId)) {
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return $this->entityCache['chapter']->get($chapterId);
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}
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$chapter = $this->entityProvider->chapter->find($chapterId);
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if ($chapter === null) {
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$chapter = false;
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}
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return $chapter;
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}
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/**
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* Get the roles for the current user;
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* @return array|bool
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*/
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protected function getRoles()
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{
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if ($this->userRoles !== false) {
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return $this->userRoles;
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}
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$roles = [];
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if (auth()->guest()) {
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$roles[] = $this->role->getSystemRole('public')->id;
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return $roles;
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}
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foreach ($this->currentUser()->roles as $role) {
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$roles[] = $role->id;
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}
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return $roles;
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}
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/**
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* Re-generate all entity permission from scratch.
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*/
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public function buildJointPermissions()
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{
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$this->jointPermission->truncate();
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$this->readyEntityCache();
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// Get all roles (Should be the most limited dimension)
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$roles = $this->role->with('permissions')->get()->all();
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// Chunk through all books
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$this->bookFetchQuery()->chunk(5, function ($books) use ($roles) {
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$this->buildJointPermissionsForBooks($books, $roles);
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});
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// Chunk through all bookshelves
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$this->entityProvider->bookshelf->newQuery()->select(['id', 'restricted', 'created_by'])
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->chunk(50, function ($shelves) use ($roles) {
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$this->buildJointPermissionsForShelves($shelves, $roles);
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});
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}
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/**
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* Get a query for fetching a book with it's children.
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* @return QueryBuilder
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*/
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protected function bookFetchQuery()
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{
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return $this->entityProvider->book->newQuery()
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->select(['id', 'restricted', 'created_by'])->with(['chapters' => function ($query) {
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$query->select(['id', 'restricted', 'created_by', 'book_id']);
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}, 'pages' => function ($query) {
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$query->select(['id', 'restricted', 'created_by', 'book_id', 'chapter_id']);
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}]);
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}
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/**
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* @param Collection $shelves
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* @param array $roles
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* @param bool $deleteOld
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* @throws \Throwable
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*/
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protected function buildJointPermissionsForShelves($shelves, $roles, $deleteOld = false)
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{
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if ($deleteOld) {
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$this->deleteManyJointPermissionsForEntities($shelves->all());
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}
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$this->createManyJointPermissions($shelves, $roles);
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}
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/**
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* Build joint permissions for an array of books
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* @param Collection $books
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* @param array $roles
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* @param bool $deleteOld
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* @throws \Throwable
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*/
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protected function buildJointPermissionsForBooks($books, $roles, $deleteOld = false)
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{
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$entities = clone $books;
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/** @var Book $book */
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foreach ($books->all() as $book) {
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foreach ($book->getRelation('chapters') as $chapter) {
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$entities->push($chapter);
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}
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foreach ($book->getRelation('pages') as $page) {
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$entities->push($page);
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}
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}
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if ($deleteOld) {
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$this->deleteManyJointPermissionsForEntities($entities->all());
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}
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$this->createManyJointPermissions($entities, $roles);
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}
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/**
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* Rebuild the entity jointPermissions for a particular entity.
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* @param \BookStack\Entities\Entity $entity
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* @throws \Throwable
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*/
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public function buildJointPermissionsForEntity(Entity $entity)
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{
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$entities = [$entity];
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if ($entity->isA('book')) {
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$books = $this->bookFetchQuery()->where('id', '=', $entity->id)->get();
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$this->buildJointPermissionsForBooks($books, $this->role->newQuery()->get(), true);
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return;
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}
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if ($entity->book) {
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$entities[] = $entity->book;
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}
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if ($entity->isA('page') && $entity->chapter_id) {
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$entities[] = $entity->chapter;
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}
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if ($entity->isA('chapter')) {
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foreach ($entity->pages as $page) {
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$entities[] = $page;
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}
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}
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$this->buildJointPermissionsForEntities(collect($entities));
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}
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/**
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* Rebuild the entity jointPermissions for a collection of entities.
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* @param Collection $entities
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* @throws \Throwable
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*/
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public function buildJointPermissionsForEntities(Collection $entities)
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{
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$roles = $this->role->newQuery()->get();
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$this->deleteManyJointPermissionsForEntities($entities->all());
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$this->createManyJointPermissions($entities, $roles);
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}
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/**
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* Build the entity jointPermissions for a particular role.
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* @param Role $role
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*/
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public function buildJointPermissionForRole(Role $role)
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{
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$roles = [$role];
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$this->deleteManyJointPermissionsForRoles($roles);
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// Chunk through all books
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$this->bookFetchQuery()->chunk(20, function ($books) use ($roles) {
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$this->buildJointPermissionsForBooks($books, $roles);
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});
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// Chunk through all bookshelves
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$this->entityProvider->bookshelf->newQuery()->select(['id', 'restricted', 'created_by'])
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->chunk(50, function ($shelves) use ($roles) {
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$this->buildJointPermissionsForShelves($shelves, $roles);
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});
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}
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/**
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* Delete the entity jointPermissions attached to a particular role.
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* @param Role $role
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*/
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public function deleteJointPermissionsForRole(Role $role)
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{
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$this->deleteManyJointPermissionsForRoles([$role]);
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}
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/**
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* Delete all of the entity jointPermissions for a list of entities.
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* @param Role[] $roles
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*/
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protected function deleteManyJointPermissionsForRoles($roles)
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{
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$roleIds = array_map(function ($role) {
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return $role->id;
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}, $roles);
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$this->jointPermission->newQuery()->whereIn('role_id', $roleIds)->delete();
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}
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/**
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* Delete the entity jointPermissions for a particular entity.
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* @param Entity $entity
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* @throws \Throwable
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*/
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public function deleteJointPermissionsForEntity(Entity $entity)
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{
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$this->deleteManyJointPermissionsForEntities([$entity]);
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}
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/**
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* Delete all of the entity jointPermissions for a list of entities.
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* @param \BookStack\Entities\Entity[] $entities
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* @throws \Throwable
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*/
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protected function deleteManyJointPermissionsForEntities($entities)
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{
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if (count($entities) === 0) {
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return;
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}
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$this->db->transaction(function () use ($entities) {
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foreach (array_chunk($entities, 1000) as $entityChunk) {
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$query = $this->db->table('joint_permissions');
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foreach ($entityChunk as $entity) {
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$query->orWhere(function (QueryBuilder $query) use ($entity) {
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$query->where('entity_id', '=', $entity->id)
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->where('entity_type', '=', $entity->getMorphClass());
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});
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}
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$query->delete();
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}
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});
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}
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/**
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* Create & Save entity jointPermissions for many entities and jointPermissions.
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* @param Collection $entities
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* @param array $roles
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* @throws \Throwable
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*/
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protected function createManyJointPermissions($entities, $roles)
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{
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$this->readyEntityCache($entities);
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$jointPermissions = [];
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// Fetch Entity Permissions and create a mapping of entity restricted statuses
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$entityRestrictedMap = [];
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$permissionFetch = $this->entityPermission->newQuery();
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foreach ($entities as $entity) {
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$entityRestrictedMap[$entity->getMorphClass() . ':' . $entity->id] = boolval($entity->getRawAttribute('restricted'));
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$permissionFetch->orWhere(function ($query) use ($entity) {
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$query->where('restrictable_id', '=', $entity->id)->where('restrictable_type', '=', $entity->getMorphClass());
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});
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}
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$permissions = $permissionFetch->get();
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// Create a mapping of explicit entity permissions
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$permissionMap = [];
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foreach ($permissions as $permission) {
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$key = $permission->restrictable_type . ':' . $permission->restrictable_id . ':' . $permission->role_id . ':' . $permission->action;
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$isRestricted = $entityRestrictedMap[$permission->restrictable_type . ':' . $permission->restrictable_id];
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$permissionMap[$key] = $isRestricted;
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}
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// Create a mapping of role permissions
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$rolePermissionMap = [];
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foreach ($roles as $role) {
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foreach ($role->permissions as $permission) {
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$rolePermissionMap[$role->getRawAttribute('id') . ':' . $permission->getRawAttribute('name')] = true;
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}
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}
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// Create Joint Permission Data
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foreach ($entities as $entity) {
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foreach ($roles as $role) {
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foreach ($this->getActions($entity) as $action) {
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$jointPermissions[] = $this->createJointPermissionData($entity, $role, $action, $permissionMap, $rolePermissionMap);
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}
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}
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}
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$this->db->transaction(function () use ($jointPermissions) {
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foreach (array_chunk($jointPermissions, 1000) as $jointPermissionChunk) {
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$this->db->table('joint_permissions')->insert($jointPermissionChunk);
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}
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});
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}
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/**
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* Get the actions related to an entity.
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* @param \BookStack\Entities\Entity $entity
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* @return array
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*/
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protected function getActions(Entity $entity)
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{
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$baseActions = ['view', 'update', 'delete'];
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if ($entity->isA('chapter') || $entity->isA('book')) {
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$baseActions[] = 'page-create';
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}
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if ($entity->isA('book')) {
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$baseActions[] = 'chapter-create';
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}
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return $baseActions;
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}
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/**
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* Create entity permission data for an entity and role
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* for a particular action.
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* @param Entity $entity
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* @param Role $role
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* @param string $action
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* @param array $permissionMap
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* @param array $rolePermissionMap
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* @return array
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*/
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protected function createJointPermissionData(Entity $entity, Role $role, $action, $permissionMap, $rolePermissionMap)
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{
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$permissionPrefix = (strpos($action, '-') === false ? ($entity->getType() . '-') : '') . $action;
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$roleHasPermission = isset($rolePermissionMap[$role->getRawAttribute('id') . ':' . $permissionPrefix . '-all']);
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$roleHasPermissionOwn = isset($rolePermissionMap[$role->getRawAttribute('id') . ':' . $permissionPrefix . '-own']);
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$explodedAction = explode('-', $action);
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$restrictionAction = end($explodedAction);
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if ($role->system_name === 'admin') {
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return $this->createJointPermissionDataArray($entity, $role, $action, true, true);
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}
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if ($entity->restricted) {
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$hasAccess = $this->mapHasActiveRestriction($permissionMap, $entity, $role, $restrictionAction);
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return $this->createJointPermissionDataArray($entity, $role, $action, $hasAccess, $hasAccess);
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}
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if ($entity->isA('book') || $entity->isA('bookshelf')) {
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return $this->createJointPermissionDataArray($entity, $role, $action, $roleHasPermission, $roleHasPermissionOwn);
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}
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// For chapters and pages, Check if explicit permissions are set on the Book.
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$book = $this->getBook($entity->book_id);
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$hasExplicitAccessToParents = $this->mapHasActiveRestriction($permissionMap, $book, $role, $restrictionAction);
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$hasPermissiveAccessToParents = !$book->restricted;
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// For pages with a chapter, Check if explicit permissions are set on the Chapter
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if ($entity->isA('page') && $entity->chapter_id !== 0 && $entity->chapter_id !== '0') {
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$chapter = $this->getChapter($entity->chapter_id);
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$hasPermissiveAccessToParents = $hasPermissiveAccessToParents && !$chapter->restricted;
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if ($chapter->restricted) {
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$hasExplicitAccessToParents = $this->mapHasActiveRestriction($permissionMap, $chapter, $role, $restrictionAction);
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}
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}
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return $this->createJointPermissionDataArray(
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$entity,
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$role,
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$action,
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($hasExplicitAccessToParents || ($roleHasPermission && $hasPermissiveAccessToParents)),
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($hasExplicitAccessToParents || ($roleHasPermissionOwn && $hasPermissiveAccessToParents))
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);
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}
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/**
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* Check for an active restriction in an entity map.
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* @param $entityMap
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* @param Entity $entity
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* @param Role $role
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* @param $action
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* @return bool
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*/
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protected function mapHasActiveRestriction($entityMap, Entity $entity, Role $role, $action)
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{
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$key = $entity->getMorphClass() . ':' . $entity->getRawAttribute('id') . ':' . $role->getRawAttribute('id') . ':' . $action;
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return isset($entityMap[$key]) ? $entityMap[$key] : false;
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}
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/**
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* Create an array of data with the information of an entity jointPermissions.
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* Used to build data for bulk insertion.
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* @param \BookStack\Entities\Entity $entity
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* @param Role $role
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* @param $action
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* @param $permissionAll
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* @param $permissionOwn
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* @return array
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*/
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protected function createJointPermissionDataArray(Entity $entity, Role $role, $action, $permissionAll, $permissionOwn)
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{
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return [
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'role_id' => $role->getRawAttribute('id'),
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'entity_id' => $entity->getRawAttribute('id'),
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'entity_type' => $entity->getMorphClass(),
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'action' => $action,
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'has_permission' => $permissionAll,
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'has_permission_own' => $permissionOwn,
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'created_by' => $entity->getRawAttribute('created_by')
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];
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}
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/**
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* Checks if an entity has a restriction set upon it.
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* @param Ownable $ownable
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* @param $permission
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* @return bool
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*/
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public function checkOwnableUserAccess(Ownable $ownable, $permission)
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{
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$explodedPermission = explode('-', $permission);
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$baseQuery = $ownable->where('id', '=', $ownable->id);
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$action = end($explodedPermission);
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$this->currentAction = $action;
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$nonJointPermissions = ['restrictions', 'image', 'attachment', 'comment'];
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// Handle non entity specific jointPermissions
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if (in_array($explodedPermission[0], $nonJointPermissions)) {
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$allPermission = $this->currentUser() && $this->currentUser()->can($permission . '-all');
|
|
$ownPermission = $this->currentUser() && $this->currentUser()->can($permission . '-own');
|
|
$this->currentAction = 'view';
|
|
$isOwner = $this->currentUser() && $this->currentUser()->id === $ownable->created_by;
|
|
return ($allPermission || ($isOwner && $ownPermission));
|
|
}
|
|
|
|
// Handle abnormal create jointPermissions
|
|
if ($action === 'create') {
|
|
$this->currentAction = $permission;
|
|
}
|
|
|
|
$q = $this->entityRestrictionQuery($baseQuery)->count() > 0;
|
|
$this->clean();
|
|
return $q;
|
|
}
|
|
|
|
/**
|
|
* Check if an entity has restrictions set on itself or its
|
|
* parent tree.
|
|
* @param \BookStack\Entities\Entity $entity
|
|
* @param $action
|
|
* @return bool|mixed
|
|
*/
|
|
public function checkIfRestrictionsSet(Entity $entity, $action)
|
|
{
|
|
$this->currentAction = $action;
|
|
if ($entity->isA('page')) {
|
|
return $entity->restricted || ($entity->chapter && $entity->chapter->restricted) || $entity->book->restricted;
|
|
} elseif ($entity->isA('chapter')) {
|
|
return $entity->restricted || $entity->book->restricted;
|
|
} elseif ($entity->isA('book')) {
|
|
return $entity->restricted;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* The general query filter to remove all entities
|
|
* that the current user does not have access to.
|
|
* @param $query
|
|
* @return mixed
|
|
*/
|
|
protected function entityRestrictionQuery($query)
|
|
{
|
|
$q = $query->where(function ($parentQuery) {
|
|
$parentQuery->whereHas('jointPermissions', function ($permissionQuery) {
|
|
$permissionQuery->whereIn('role_id', $this->getRoles())
|
|
->where('action', '=', $this->currentAction)
|
|
->where(function ($query) {
|
|
$query->where('has_permission', '=', true)
|
|
->orWhere(function ($query) {
|
|
$query->where('has_permission_own', '=', true)
|
|
->where('created_by', '=', $this->currentUser()->id);
|
|
});
|
|
});
|
|
});
|
|
});
|
|
$this->clean();
|
|
return $q;
|
|
}
|
|
|
|
/**
|
|
* Get the children of a book in an efficient single query, Filtered by the permission system.
|
|
* @param integer $book_id
|
|
* @param bool $filterDrafts
|
|
* @param bool $fetchPageContent
|
|
* @return QueryBuilder
|
|
*/
|
|
public function bookChildrenQuery($book_id, $filterDrafts = false, $fetchPageContent = false)
|
|
{
|
|
$entities = $this->entityProvider;
|
|
$pageSelect = $this->db->table('pages')->selectRaw($entities->page->entityRawQuery($fetchPageContent))
|
|
->where('book_id', '=', $book_id)->where(function ($query) use ($filterDrafts) {
|
|
$query->where('draft', '=', 0);
|
|
if (!$filterDrafts) {
|
|
$query->orWhere(function ($query) {
|
|
$query->where('draft', '=', 1)->where('created_by', '=', $this->currentUser()->id);
|
|
});
|
|
}
|
|
});
|
|
$chapterSelect = $this->db->table('chapters')->selectRaw($entities->chapter->entityRawQuery())->where('book_id', '=', $book_id);
|
|
$query = $this->db->query()->select('*')->from($this->db->raw("({$pageSelect->toSql()} UNION {$chapterSelect->toSql()}) AS U"))
|
|
->mergeBindings($pageSelect)->mergeBindings($chapterSelect);
|
|
|
|
// Add joint permission filter
|
|
$whereQuery = $this->db->table('joint_permissions as jp')->selectRaw('COUNT(*)')
|
|
->whereRaw('jp.entity_id=U.id')->whereRaw('jp.entity_type=U.entity_type')
|
|
->where('jp.action', '=', 'view')->whereIn('jp.role_id', $this->getRoles())
|
|
->where(function ($query) {
|
|
$query->where('jp.has_permission', '=', 1)->orWhere(function ($query) {
|
|
$query->where('jp.has_permission_own', '=', 1)->where('jp.created_by', '=', $this->currentUser()->id);
|
|
});
|
|
});
|
|
$query->whereRaw("({$whereQuery->toSql()}) > 0")->mergeBindings($whereQuery);
|
|
|
|
$query->orderBy('draft', 'desc')->orderBy('priority', 'asc');
|
|
$this->clean();
|
|
return $query;
|
|
}
|
|
|
|
/**
|
|
* Add restrictions for a generic entity
|
|
* @param string $entityType
|
|
* @param Builder|\BookStack\Entities\Entity $query
|
|
* @param string $action
|
|
* @return Builder
|
|
*/
|
|
public function enforceEntityRestrictions($entityType, $query, $action = 'view')
|
|
{
|
|
if (strtolower($entityType) === 'page') {
|
|
// Prevent drafts being visible to others.
|
|
$query = $query->where(function ($query) {
|
|
$query->where('draft', '=', false);
|
|
if ($this->currentUser()) {
|
|
$query->orWhere(function ($query) {
|
|
$query->where('draft', '=', true)->where('created_by', '=', $this->currentUser()->id);
|
|
});
|
|
}
|
|
});
|
|
}
|
|
|
|
$this->currentAction = $action;
|
|
return $this->entityRestrictionQuery($query);
|
|
}
|
|
|
|
/**
|
|
* Filter items that have entities set as a polymorphic relation.
|
|
* @param $query
|
|
* @param string $tableName
|
|
* @param string $entityIdColumn
|
|
* @param string $entityTypeColumn
|
|
* @param string $action
|
|
* @return mixed
|
|
*/
|
|
public function filterRestrictedEntityRelations($query, $tableName, $entityIdColumn, $entityTypeColumn, $action = 'view')
|
|
{
|
|
|
|
$this->currentAction = $action;
|
|
$tableDetails = ['tableName' => $tableName, 'entityIdColumn' => $entityIdColumn, 'entityTypeColumn' => $entityTypeColumn];
|
|
|
|
$q = $query->where(function ($query) use ($tableDetails) {
|
|
$query->whereExists(function ($permissionQuery) use (&$tableDetails) {
|
|
$permissionQuery->select('id')->from('joint_permissions')
|
|
->whereRaw('joint_permissions.entity_id=' . $tableDetails['tableName'] . '.' . $tableDetails['entityIdColumn'])
|
|
->whereRaw('joint_permissions.entity_type=' . $tableDetails['tableName'] . '.' . $tableDetails['entityTypeColumn'])
|
|
->where('action', '=', $this->currentAction)
|
|
->whereIn('role_id', $this->getRoles())
|
|
->where(function ($query) {
|
|
$query->where('has_permission', '=', true)->orWhere(function ($query) {
|
|
$query->where('has_permission_own', '=', true)
|
|
->where('created_by', '=', $this->currentUser()->id);
|
|
});
|
|
});
|
|
});
|
|
});
|
|
$this->clean();
|
|
return $q;
|
|
}
|
|
|
|
/**
|
|
* Filters pages that are a direct relation to another item.
|
|
* @param $query
|
|
* @param $tableName
|
|
* @param $entityIdColumn
|
|
* @return mixed
|
|
*/
|
|
public function filterRelatedPages($query, $tableName, $entityIdColumn)
|
|
{
|
|
$this->currentAction = 'view';
|
|
$tableDetails = ['tableName' => $tableName, 'entityIdColumn' => $entityIdColumn];
|
|
|
|
$pageMorphClass = $this->entityProvider->page->getMorphClass();
|
|
$q = $query->where(function ($query) use ($tableDetails, $pageMorphClass) {
|
|
$query->where(function ($query) use (&$tableDetails, $pageMorphClass) {
|
|
$query->whereExists(function ($permissionQuery) use (&$tableDetails, $pageMorphClass) {
|
|
$permissionQuery->select('id')->from('joint_permissions')
|
|
->whereRaw('joint_permissions.entity_id=' . $tableDetails['tableName'] . '.' . $tableDetails['entityIdColumn'])
|
|
->where('entity_type', '=', $pageMorphClass)
|
|
->where('action', '=', $this->currentAction)
|
|
->whereIn('role_id', $this->getRoles())
|
|
->where(function ($query) {
|
|
$query->where('has_permission', '=', true)->orWhere(function ($query) {
|
|
$query->where('has_permission_own', '=', true)
|
|
->where('created_by', '=', $this->currentUser()->id);
|
|
});
|
|
});
|
|
});
|
|
})->orWhere($tableDetails['entityIdColumn'], '=', 0);
|
|
});
|
|
$this->clean();
|
|
return $q;
|
|
}
|
|
|
|
/**
|
|
* Get the current user
|
|
* @return \BookStack\Auth\User
|
|
*/
|
|
private function currentUser()
|
|
{
|
|
if ($this->currentUserModel === false) {
|
|
$this->currentUserModel = user();
|
|
}
|
|
|
|
return $this->currentUserModel;
|
|
}
|
|
|
|
/**
|
|
* Clean the cached user elements.
|
|
*/
|
|
private function clean()
|
|
{
|
|
$this->currentUserModel = false;
|
|
$this->userRoles = false;
|
|
$this->isAdminUser = null;
|
|
}
|
|
}
|