666 lines
24 KiB
PHP
666 lines
24 KiB
PHP
<?php namespace BookStack\Auth\Permissions;
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use BookStack\Auth\Role;
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use BookStack\Auth\User;
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use BookStack\Entities\Models\Book;
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use BookStack\Entities\Models\BookChild;
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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\Entity;
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use BookStack\Entities\Models\Page;
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use BookStack\Model;
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use BookStack\Traits\HasCreatorAndUpdater;
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use BookStack\Traits\HasOwner;
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use Illuminate\Database\Connection;
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use Illuminate\Database\Eloquent\Builder;
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use Illuminate\Database\Eloquent\Collection as EloquentCollection;
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use Illuminate\Database\Query\Builder as QueryBuilder;
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use Throwable;
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class PermissionService
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{
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/**
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* @var ?array
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*/
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protected $userRoles = null;
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/**
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* @var ?User
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*/
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protected $currentUserModel = null;
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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 array
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*/
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protected $entityCache;
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/**
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* PermissionService constructor.
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*/
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public function __construct(Connection $db)
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{
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$this->db = $db;
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}
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/**
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* Set the database 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 Entity[] $entities
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*/
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protected function readyEntityCache(array $entities = [])
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{
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$this->entityCache = [];
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foreach ($entities as $entity) {
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$class = get_class($entity);
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if (!isset($this->entityCache[$class])) {
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$this->entityCache[$class] = collect();
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}
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$this->entityCache[$class]->put($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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*/
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protected function getBook(int $bookId): ?Book
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{
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if (isset($this->entityCache[Book::class]) && $this->entityCache[Book::class]->has($bookId)) {
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return $this->entityCache[Book::class]->get($bookId);
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}
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return Book::query()->withTrashed()->find($bookId);
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}
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/**
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* Get a chapter via ID, Checks local cache
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*/
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protected function getChapter(int $chapterId): ?Chapter
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{
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if (isset($this->entityCache[Chapter::class]) && $this->entityCache[Chapter::class]->has($chapterId)) {
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return $this->entityCache[Chapter::class]->get($chapterId);
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}
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return Chapter::query()
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->withTrashed()
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->find($chapterId);
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}
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/**
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* Get the roles for the current logged in user.
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*/
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protected function getCurrentUserRoles(): array
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{
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if (!is_null($this->userRoles)) {
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return $this->userRoles;
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}
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if (auth()->guest()) {
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$this->userRoles = [Role::getSystemRole('public')->id];
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} else {
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$this->userRoles = $this->currentUser()->roles->pluck('id')->values()->all();
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}
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return $this->userRoles;
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}
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/**
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* Re-generate all entity permission from scratch.
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*/
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public function buildJointPermissions()
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{
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JointPermission::query()->truncate();
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$this->readyEntityCache();
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// Get all roles (Should be the most limited dimension)
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$roles = Role::query()->with('permissions')->get()->all();
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// Chunk through all books
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$this->bookFetchQuery()->chunk(5, function (EloquentCollection $books) use ($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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Bookshelf::query()->withTrashed()->select(['id', 'restricted', 'owned_by'])
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->chunk(50, function (EloquentCollection $shelves) use ($roles) {
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$this->buildJointPermissionsForShelves($shelves, $roles);
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});
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}
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/**
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* Get a query for fetching a book with it's children.
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*/
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protected function bookFetchQuery(): Builder
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{
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return Book::query()->withTrashed()
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->select(['id', 'restricted', 'owned_by'])->with([
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'chapters' => function ($query) {
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$query->withTrashed()->select(['id', 'restricted', 'owned_by', 'book_id']);
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},
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'pages' => function ($query) {
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$query->withTrashed()->select(['id', 'restricted', 'owned_by', 'book_id', 'chapter_id']);
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}
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]);
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}
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/**
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* Build joint permissions for the given shelf and role combinations.
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* @throws Throwable
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*/
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protected function buildJointPermissionsForShelves(EloquentCollection $shelves, array $roles, bool $deleteOld = false)
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{
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if ($deleteOld) {
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$this->deleteManyJointPermissionsForEntities($shelves->all());
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}
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$this->createManyJointPermissions($shelves->all(), $roles);
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}
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/**
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* Build joint permissions for the given book and role combinations.
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* @throws Throwable
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*/
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protected function buildJointPermissionsForBooks(EloquentCollection $books, array $roles, bool $deleteOld = false)
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{
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$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->all(), $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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* @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 instanceof Book) {
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$books = $this->bookFetchQuery()->where('id', '=', $entity->id)->get();
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$this->buildJointPermissionsForBooks($books, Role::query()->get()->all(), true);
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return;
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}
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/** @var BookChild $entity */
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if ($entity->book) {
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$entities[] = $entity->book;
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}
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if ($entity instanceof Page && $entity->chapter_id) {
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$entities[] = $entity->chapter;
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}
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if ($entity instanceof 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($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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* @throws Throwable
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*/
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public function buildJointPermissionsForEntities(array $entities)
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{
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$roles = Role::query()->get()->values()->all();
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$this->deleteManyJointPermissionsForEntities($entities);
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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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*/
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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, $roles);
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});
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// Chunk through all bookshelves
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Bookshelf::query()->select(['id', 'restricted', 'owned_by'])
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->chunk(50, function ($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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*/
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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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JointPermission::query()->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 Entity[] $entities
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* @throws Throwable
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*/
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protected function deleteManyJointPermissionsForEntities(array $entities)
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{
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if (count($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 roles.
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* @param Entity[] $entities
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* @param Role[] $roles
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* @throws Throwable
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*/
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protected function createManyJointPermissions(array $entities, array $roles)
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{
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$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 = EntityPermission::query();
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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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*/
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protected function getActions(Entity $entity): array
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{
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$baseActions = ['view', 'update', 'delete'];
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if ($entity instanceof Chapter || $entity instanceof Book) {
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$baseActions[] = 'page-create';
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}
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if ($entity instanceof Book) {
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$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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*/
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protected function createJointPermissionData(Entity $entity, Role $role, string $action, array $permissionMap, array $rolePermissionMap): array
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{
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$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 instanceof Book || $entity instanceof 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 instanceof Page && intval($entity->chapter_id) !== 0) {
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$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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*/
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protected function mapHasActiveRestriction(array $entityMap, Entity $entity, Role $role, string $action): bool
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{
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$key = $entity->getMorphClass() . ':' . $entity->getRawAttribute('id') . ':' . $role->getRawAttribute('id') . ':' . $action;
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return $entityMap[$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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*/
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protected function createJointPermissionDataArray(Entity $entity, Role $role, string $action, bool $permissionAll, bool $permissionOwn): array
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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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'owned_by' => $entity->getRawAttribute('owned_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 HasCreatorAndUpdater|HasOwner $ownable
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*/
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public function checkOwnableUserAccess(Model $ownable, string $permission): bool
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{
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$explodedPermission = explode('-', $permission);
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$baseQuery = $ownable->newQuery()->where('id', '=', $ownable->id);
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$action = end($explodedPermission);
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$user = $this->currentUser();
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$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 = $user && $user->can($permission . '-all');
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$ownPermission = $user && $user->can($permission . '-own');
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$ownerField = ($ownable instanceof Entity) ? 'owned_by' : 'created_by';
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$isOwner = $user && $user->id === $ownable->$ownerField;
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return ($allPermission || ($isOwner && $ownPermission));
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}
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// Handle abnormal create jointPermissions
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if ($action === 'create') {
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$action = $permission;
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}
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$hasAccess = $this->entityRestrictionQuery($baseQuery, $action)->count() > 0;
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$this->clean();
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return $hasAccess;
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}
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/**
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* Checks if a user has the given permission for any items in the system.
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* Can be passed an entity instance to filter on a specific type.
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*/
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public function checkUserHasPermissionOnAnything(string $permission, ?string $entityClass = null): bool
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{
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$userRoleIds = $this->currentUser()->roles()->select('id')->pluck('id')->toArray();
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$userId = $this->currentUser()->id;
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$permissionQuery = JointPermission::query()
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->where('action', '=', $permission)
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->whereIn('role_id', $userRoleIds)
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->where(function (Builder $query) use ($userId) {
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$this->addJointHasPermissionCheck($query, $userId);
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});
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if (!is_null($entityClass)) {
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$entityInstance = app($entityClass);
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$permissionQuery = $permissionQuery->where('entity_type', '=', $entityInstance->getMorphClass());
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}
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$hasPermission = $permissionQuery->count() > 0;
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$this->clean();
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return $hasPermission;
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}
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/**
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* The general query filter to remove all entities
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* that the current user does not have access to.
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*/
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protected function entityRestrictionQuery(Builder $query, string $action): Builder
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{
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$q = $query->where(function ($parentQuery) use ($action) {
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$parentQuery->whereHas('jointPermissions', function ($permissionQuery) use ($action) {
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$permissionQuery->whereIn('role_id', $this->getCurrentUserRoles())
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->where('action', '=', $action)
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->where(function (Builder $query) {
|
|
$this->addJointHasPermissionCheck($query, $this->currentUser()->id);
|
|
});
|
|
});
|
|
});
|
|
|
|
$this->clean();
|
|
return $q;
|
|
}
|
|
|
|
/**
|
|
* Limited the given entity query so that the query will only
|
|
* return items that the user has permission for the given ability.
|
|
*/
|
|
public function restrictEntityQuery(Builder $query, string $ability = 'view'): Builder
|
|
{
|
|
$this->clean();
|
|
return $query->where(function (Builder $parentQuery) use ($ability) {
|
|
$parentQuery->whereHas('jointPermissions', function (Builder $permissionQuery) use ($ability) {
|
|
$permissionQuery->whereIn('role_id', $this->getCurrentUserRoles())
|
|
->where('action', '=', $ability)
|
|
->where(function (Builder $query) {
|
|
$this->addJointHasPermissionCheck($query, $this->currentUser()->id);
|
|
});
|
|
});
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Extend the given page query to ensure draft items are not visible
|
|
* unless created by the given user.
|
|
*/
|
|
public function enforceDraftVisibilityOnQuery(Builder $query): Builder
|
|
{
|
|
return $query->where(function (Builder $query) {
|
|
$query->where('draft', '=', false)
|
|
->orWhere(function (Builder $query) {
|
|
$query->where('draft', '=', true)
|
|
->where('owned_by', '=', $this->currentUser()->id);
|
|
});
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Add restrictions for a generic entity.
|
|
*/
|
|
public function enforceEntityRestrictions(Entity $entity, Builder $query, string $action = 'view'): Builder
|
|
{
|
|
if ($entity instanceof Page) {
|
|
// Prevent drafts being visible to others.
|
|
$this->enforceDraftVisibilityOnQuery($query);
|
|
}
|
|
|
|
return $this->entityRestrictionQuery($query, $action);
|
|
}
|
|
|
|
/**
|
|
* Filter items that have entities set as a polymorphic relation.
|
|
*/
|
|
public function filterRestrictedEntityRelations(Builder $query, string $tableName, string $entityIdColumn, string $entityTypeColumn, string $action = 'view'): Builder
|
|
{
|
|
$tableDetails = ['tableName' => $tableName, 'entityIdColumn' => $entityIdColumn, 'entityTypeColumn' => $entityTypeColumn];
|
|
|
|
$q = $query->where(function ($query) use ($tableDetails, $action) {
|
|
$query->whereExists(function ($permissionQuery) use (&$tableDetails, $action) {
|
|
$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', '=', $action)
|
|
->whereIn('role_id', $this->getCurrentUserRoles())
|
|
->where(function (QueryBuilder $query) {
|
|
$this->addJointHasPermissionCheck($query, $this->currentUser()->id);
|
|
});
|
|
});
|
|
});
|
|
|
|
$this->clean();
|
|
return $q;
|
|
}
|
|
|
|
/**
|
|
* Add conditions to a query to filter the selection to related entities
|
|
* where view permissions are granted.
|
|
*/
|
|
public function filterRelatedEntity(string $entityClass, Builder $query, string $tableName, string $entityIdColumn): Builder
|
|
{
|
|
$tableDetails = ['tableName' => $tableName, 'entityIdColumn' => $entityIdColumn];
|
|
$morphClass = app($entityClass)->getMorphClass();
|
|
|
|
$q = $query->where(function ($query) use ($tableDetails, $morphClass) {
|
|
$query->where(function ($query) use (&$tableDetails, $morphClass) {
|
|
$query->whereExists(function ($permissionQuery) use (&$tableDetails, $morphClass) {
|
|
$permissionQuery->select('id')->from('joint_permissions')
|
|
->whereRaw('joint_permissions.entity_id=' . $tableDetails['tableName'] . '.' . $tableDetails['entityIdColumn'])
|
|
->where('entity_type', '=', $morphClass)
|
|
->where('action', '=', 'view')
|
|
->whereIn('role_id', $this->getCurrentUserRoles())
|
|
->where(function (QueryBuilder $query) {
|
|
$this->addJointHasPermissionCheck($query, $this->currentUser()->id);
|
|
});
|
|
});
|
|
})->orWhere($tableDetails['entityIdColumn'], '=', 0);
|
|
});
|
|
|
|
$this->clean();
|
|
return $q;
|
|
}
|
|
|
|
/**
|
|
* Add the query for checking the given user id has permission
|
|
* within the join_permissions table.
|
|
* @param QueryBuilder|Builder $query
|
|
*/
|
|
protected function addJointHasPermissionCheck($query, int $userIdToCheck)
|
|
{
|
|
$query->where('has_permission', '=', true)->orWhere(function ($query) use ($userIdToCheck) {
|
|
$query->where('has_permission_own', '=', true)
|
|
->where('owned_by', '=', $userIdToCheck);
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Get the current user
|
|
*/
|
|
private function currentUser(): User
|
|
{
|
|
if (is_null($this->currentUserModel)) {
|
|
$this->currentUserModel = user();
|
|
}
|
|
|
|
return $this->currentUserModel;
|
|
}
|
|
|
|
/**
|
|
* Clean the cached user elements.
|
|
*/
|
|
private function clean(): void
|
|
{
|
|
$this->currentUserModel = null;
|
|
$this->userRoles = null;
|
|
}
|
|
}
|