mirror of
https://github.com/BookStackApp/BookStack.git
synced 2024-11-28 11:43:40 +08:00
651 lines
23 KiB
PHP
651 lines
23 KiB
PHP
<?php namespace BookStack\Services;
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use BookStack\Book;
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use BookStack\Chapter;
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use BookStack\Entity;
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use BookStack\JointPermission;
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use BookStack\Ownable;
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use BookStack\Page;
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use BookStack\Role;
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use BookStack\User;
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use Illuminate\Database\Connection;
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use Illuminate\Database\Eloquent\Builder;
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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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public $book;
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public $chapter;
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public $page;
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protected $db;
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protected $jointPermission;
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protected $role;
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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 Connection $db
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* @param Book $book
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* @param Chapter $chapter
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* @param Page $page
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* @param Role $role
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*/
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public function __construct(JointPermission $jointPermission, Connection $db, Book $book, Chapter $chapter, Page $page, Role $role)
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{
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$this->db = $db;
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$this->jointPermission = $jointPermission;
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$this->role = $role;
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$this->book = $book;
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$this->chapter = $chapter;
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$this->page = $page;
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// TODO - Update so admin still goes through filters
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}
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/**
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* Prepare the local entity cache and ensure it's empty
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*/
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protected function readyEntityCache()
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{
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$this->entityCache = [
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'books' => collect(),
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'chapters' => collect()
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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['books']) && $this->entityCache['books']->has($bookId)) {
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return $this->entityCache['books']->get($bookId);
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}
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$book = $this->book->find($bookId);
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if ($book === null) $book = false;
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if (isset($this->entityCache['books'])) {
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$this->entityCache['books']->put($bookId, $book);
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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 $chapterId
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* @return Book
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*/
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protected function getChapter($chapterId)
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{
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if (isset($this->entityCache['chapters']) && $this->entityCache['chapters']->has($chapterId)) {
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return $this->entityCache['chapters']->get($chapterId);
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}
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$chapter = $this->chapter->find($chapterId);
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if ($chapter === null) $chapter = false;
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if (isset($this->entityCache['chapters'])) {
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$this->entityCache['chapters']->put($chapterId, $chapter);
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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) return $this->userRoles;
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$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 = $this->role->with('permissions')->get();
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// Chunk through all books
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$this->book->with('permissions')->chunk(500, function ($books) use ($roles) {
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$this->createManyJointPermissions($books, $roles);
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});
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// Chunk through all chapters
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$this->chapter->with('book', 'permissions')->chunk(500, function ($chapters) use ($roles) {
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$this->createManyJointPermissions($chapters, $roles);
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});
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// Chunk through all pages
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$this->page->with('book', 'chapter', 'permissions')->chunk(500, function ($pages) use ($roles) {
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$this->createManyJointPermissions($pages, $roles);
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});
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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 Entity $entity
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*/
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public function buildJointPermissionsForEntity(Entity $entity)
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{
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$roles = $this->role->get();
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$entities = collect([$entity]);
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if ($entity->isA('book')) {
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$entities = $entities->merge($entity->chapters);
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$entities = $entities->merge($entity->pages);
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} elseif ($entity->isA('chapter')) {
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$entities = $entities->merge($entity->pages);
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}
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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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* Rebuild the entity jointPermissions for a collection of entities.
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* @param Collection $entities
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*/
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public function buildJointPermissionsForEntities(Collection $entities)
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{
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$roles = $this->role->get();
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$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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* @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 = collect([$role]);
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$this->deleteManyJointPermissionsForRoles($roles);
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// Chunk through all books
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$this->book->with('permissions')->chunk(500, function ($books) use ($roles) {
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$this->createManyJointPermissions($books, $roles);
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});
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// Chunk through all chapters
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$this->chapter->with('book', 'permissions')->chunk(500, function ($books) use ($roles) {
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$this->createManyJointPermissions($books, $roles);
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});
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// Chunk through all pages
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$this->page->with('book', 'chapter', 'permissions')->chunk(500, function ($books) use ($roles) {
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$this->createManyJointPermissions($books, $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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foreach ($roles as $role) {
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$role->jointPermissions()->delete();
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}
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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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*/
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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[] $entities
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*/
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protected function deleteManyJointPermissionsForEntities($entities)
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{
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if (count($entities) === 0) return;
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$query = $this->jointPermission->newQuery();
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foreach ($entities as $entity) {
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$query->orWhere(function($query) use ($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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* Create & Save entity jointPermissions for many entities and jointPermissions.
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* @param Collection $entities
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* @param Collection $roles
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*/
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protected function createManyJointPermissions($entities, $roles)
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{
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$this->readyEntityCache();
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$jointPermissions = [];
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foreach ($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, $action);
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}
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}
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}
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$this->jointPermission->insert($jointPermissions);
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}
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/**
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* Get the actions related to an entity.
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* @param $entity
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* @return array
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*/
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protected function getActions($entity)
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{
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$baseActions = ['view', 'update', 'delete'];
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if ($entity->isA('chapter')) {
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$baseActions[] = 'page-create';
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} else if ($entity->isA('book')) {
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$baseActions[] = 'page-create';
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$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 $action
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* @return array
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*/
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protected function createJointPermissionData(Entity $entity, Role $role, $action)
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{
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$permissionPrefix = (strpos($action, '-') === false ? ($entity->getType() . '-') : '') . $action;
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$roleHasPermission = $role->hasPermission($permissionPrefix . '-all');
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$roleHasPermissionOwn = $role->hasPermission($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->isA('book')) {
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if (!$entity->restricted) {
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return $this->createJointPermissionDataArray($entity, $role, $action, $roleHasPermission, $roleHasPermissionOwn);
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} else {
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$hasAccess = $entity->hasActiveRestriction($role->id, $restrictionAction);
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return $this->createJointPermissionDataArray($entity, $role, $action, $hasAccess, $hasAccess);
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}
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} elseif ($entity->isA('chapter')) {
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if (!$entity->restricted) {
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$book = $this->getBook($entity->book_id);
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$hasExplicitAccessToBook = $book->hasActiveRestriction($role->id, $restrictionAction);
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$hasPermissiveAccessToBook = !$book->restricted;
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return $this->createJointPermissionDataArray($entity, $role, $action,
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($hasExplicitAccessToBook || ($roleHasPermission && $hasPermissiveAccessToBook)),
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($hasExplicitAccessToBook || ($roleHasPermissionOwn && $hasPermissiveAccessToBook)));
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} else {
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$hasAccess = $entity->hasActiveRestriction($role->id, $restrictionAction);
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return $this->createJointPermissionDataArray($entity, $role, $action, $hasAccess, $hasAccess);
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}
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} elseif ($entity->isA('page')) {
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if (!$entity->restricted) {
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$book = $this->getBook($entity->book_id);
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$hasExplicitAccessToBook = $book->hasActiveRestriction($role->id, $restrictionAction);
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$hasPermissiveAccessToBook = !$book->restricted;
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$chapter = $this->getChapter($entity->chapter_id);
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$hasExplicitAccessToChapter = $chapter && $chapter->hasActiveRestriction($role->id, $restrictionAction);
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$hasPermissiveAccessToChapter = $chapter && !$chapter->restricted;
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$acknowledgeChapter = ($chapter && $chapter->restricted);
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$hasExplicitAccessToParents = $acknowledgeChapter ? $hasExplicitAccessToChapter : $hasExplicitAccessToBook;
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$hasPermissiveAccessToParents = $acknowledgeChapter ? $hasPermissiveAccessToChapter : $hasPermissiveAccessToBook;
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return $this->createJointPermissionDataArray($entity, $role, $action,
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($hasExplicitAccessToParents || ($roleHasPermission && $hasPermissiveAccessToParents)),
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($hasExplicitAccessToParents || ($roleHasPermissionOwn && $hasPermissiveAccessToParents))
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);
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} else {
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$hasAccess = $entity->hasRestriction($role->id, $action);
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return $this->createJointPermissionDataArray($entity, $role, $action, $hasAccess, $hasAccess);
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}
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}
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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 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, $permissionOwn)
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{
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$entityClass = get_class($entity);
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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' => $entityClass,
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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, $permission)
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{
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if ($this->isAdmin()) {
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$this->clean();
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return true;
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}
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$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'];
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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');
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$ownPermission = $this->currentUser() && $this->currentUser()->can($permission . '-own');
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$this->currentAction = 'view';
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$isOwner = $this->currentUser() && $this->currentUser()->id === $ownable->created_by;
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return ($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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$this->currentAction = $permission;
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}
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$q = $this->entityRestrictionQuery($baseQuery)->count() > 0;
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$this->clean();
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return $q;
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}
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/**
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* Check if an entity has restrictions set on itself or its
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* parent tree.
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* @param Entity $entity
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* @param $action
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* @return bool|mixed
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*/
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public function checkIfRestrictionsSet(Entity $entity, $action)
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{
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$this->currentAction = $action;
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if ($entity->isA('page')) {
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return $entity->restricted || ($entity->chapter && $entity->chapter->restricted) || $entity->book->restricted;
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} elseif ($entity->isA('chapter')) {
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return $entity->restricted || $entity->book->restricted;
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} elseif ($entity->isA('book')) {
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return $entity->restricted;
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}
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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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* @param $query
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* @return mixed
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*/
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protected function entityRestrictionQuery($query)
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{
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$q = $query->where(function ($parentQuery) {
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$parentQuery->whereHas('jointPermissions', function ($permissionQuery) {
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$permissionQuery->whereIn('role_id', $this->getRoles())
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->where('action', '=', $this->currentAction)
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->where(function ($query) {
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$query->where('has_permission', '=', true)
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->orWhere(function ($query) {
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$query->where('has_permission_own', '=', true)
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->where('created_by', '=', $this->currentUser()->id);
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});
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});
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});
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});
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$this->clean();
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return $q;
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}
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/**
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* Get the children of a book in an efficient single query, Filtered by the permission system.
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* @param integer $book_id
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* @param bool $filterDrafts
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* @return \Illuminate\Database\Query\Builder
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*/
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public function bookChildrenQuery($book_id, $filterDrafts = false) {
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$pageSelect = $this->db->table('pages')->selectRaw("'BookStack\\\\Page' as entity_type, id, slug, name, text, '' as description, book_id, priority, chapter_id, draft")->where('book_id', '=', $book_id)->where(function($query) use ($filterDrafts) {
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$query->where('draft', '=', 0);
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if (!$filterDrafts) {
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$query->orWhere(function($query) {
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$query->where('draft', '=', 1)->where('created_by', '=', $this->currentUser()->id);
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});
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}
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});
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$chapterSelect = $this->db->table('chapters')->selectRaw("'BookStack\\\\Chapter' as entity_type, id, slug, name, '' as text, description, book_id, priority, 0 as chapter_id, 0 as draft")->where('book_id', '=', $book_id);
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$query = $this->db->query()->select('*')->from($this->db->raw("({$pageSelect->toSql()} UNION {$chapterSelect->toSql()}) AS U"))
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->mergeBindings($pageSelect)->mergeBindings($chapterSelect);
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if (!$this->isAdmin()) {
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$whereQuery = $this->db->table('joint_permissions as jp')->selectRaw('COUNT(*)')
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->whereRaw('jp.entity_id=U.id')->whereRaw('jp.entity_type=U.entity_type')
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->where('jp.action', '=', 'view')->whereIn('jp.role_id', $this->getRoles())
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->where(function($query) {
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$query->where('jp.has_permission', '=', 1)->orWhere(function($query) {
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$query->where('jp.has_permission_own', '=', 1)->where('jp.created_by', '=', $this->currentUser()->id);
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});
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});
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$query->whereRaw("({$whereQuery->toSql()}) > 0")->mergeBindings($whereQuery);
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}
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$query->orderBy('draft', 'desc')->orderBy('priority', 'asc');
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$this->clean();
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return $query;
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}
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/**
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* Add restrictions for a generic entity
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* @param string $entityType
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* @param Builder|Entity $query
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* @param string $action
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* @return mixed
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*/
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public function enforceEntityRestrictions($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', '=', $this->currentUser()->id);
|
|
});
|
|
}
|
|
});
|
|
}
|
|
|
|
if ($this->isAdmin()) {
|
|
$this->clean();
|
|
return $query;
|
|
}
|
|
|
|
$this->currentAction = $action;
|
|
return $this->entityRestrictionQuery($query);
|
|
}
|
|
|
|
/**
|
|
* Filter items that have entities set a a polymorphic relation.
|
|
* @param $query
|
|
* @param string $tableName
|
|
* @param string $entityIdColumn
|
|
* @param string $entityTypeColumn
|
|
* @return mixed
|
|
*/
|
|
public function filterRestrictedEntityRelations($query, $tableName, $entityIdColumn, $entityTypeColumn)
|
|
{
|
|
if ($this->isAdmin()) {
|
|
$this->clean();
|
|
return $query;
|
|
}
|
|
|
|
$this->currentAction = 'view';
|
|
$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, $entityIdColumn)
|
|
{
|
|
if ($this->isAdmin()) {
|
|
$this->clean();
|
|
return $query;
|
|
}
|
|
|
|
$this->currentAction = 'view';
|
|
$tableDetails = ['tableName' => $tableName, 'entityIdColumn' => $entityIdColumn];
|
|
|
|
$q = $query->where(function ($query) use ($tableDetails) {
|
|
$query->where(function ($query) use (&$tableDetails) {
|
|
$query->whereExists(function ($permissionQuery) use (&$tableDetails) {
|
|
$permissionQuery->select('id')->from('joint_permissions')
|
|
->whereRaw('joint_permissions.entity_id=' . $tableDetails['tableName'] . '.' . $tableDetails['entityIdColumn'])
|
|
->where('entity_type', '=', 'Bookstack\\Page')
|
|
->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 $q;
|
|
}
|
|
|
|
/**
|
|
* Check if the current user is an admin.
|
|
* @return bool
|
|
*/
|
|
private function isAdmin()
|
|
{
|
|
if ($this->isAdminUser === null) {
|
|
$this->isAdminUser = ($this->currentUser()->id !== null) ? $this->currentUser()->hasSystemRole('admin') : false;
|
|
}
|
|
|
|
return $this->isAdminUser;
|
|
}
|
|
|
|
/**
|
|
* Get the current user
|
|
* @return User
|
|
*/
|
|
private function currentUser()
|
|
{
|
|
if ($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;
|
|
}
|
|
|
|
} |