BookStack/app/Services/PermissionService.php
2016-05-06 20:44:07 +01:00

505 lines
18 KiB
PHP

<?php namespace BookStack\Services;
use BookStack\Book;
use BookStack\Chapter;
use BookStack\Entity;
use BookStack\JointPermission;
use BookStack\Page;
use BookStack\Role;
use BookStack\User;
use Illuminate\Database\Eloquent\Collection;
class PermissionService
{
protected $userRoles;
protected $isAdmin;
protected $currentAction;
protected $currentUser;
public $book;
public $chapter;
public $page;
protected $jointPermission;
protected $role;
/**
* PermissionService constructor.
* @param JointPermission $jointPermission
* @param Book $book
* @param Chapter $chapter
* @param Page $page
* @param Role $role
*/
public function __construct(JointPermission $jointPermission, Book $book, Chapter $chapter, Page $page, Role $role)
{
$this->currentUser = auth()->user();
$userSet = $this->currentUser !== null;
$this->userRoles = false;
$this->isAdmin = $userSet ? $this->currentUser->hasRole('admin') : false;
if (!$userSet) $this->currentUser = new User();
$this->jointPermission = $jointPermission;
$this->role = $role;
$this->book = $book;
$this->chapter = $chapter;
$this->page = $page;
}
/**
* Get the roles for the current user;
* @return array|bool
*/
protected function getRoles()
{
if ($this->userRoles !== false) return $this->userRoles;
$roles = [];
if (auth()->guest()) {
$roles[] = $this->role->getSystemRole('public')->id;
return $roles;
}
foreach ($this->currentUser->roles as $role) {
$roles[] = $role->id;
}
return $roles;
}
/**
* Re-generate all entity permission from scratch.
*/
public function buildJointPermissions()
{
$this->jointPermission->truncate();
// Get all roles (Should be the most limited dimension)
$roles = $this->role->with('permissions')->get();
// Chunk through all books
$this->book->with('permissions')->chunk(500, function ($books) use ($roles) {
$this->createManyJointPermissions($books, $roles);
});
// Chunk through all chapters
$this->chapter->with('book', 'permissions')->chunk(500, function ($chapters) use ($roles) {
$this->createManyJointPermissions($chapters, $roles);
});
// Chunk through all pages
$this->page->with('book', 'chapter', 'permissions')->chunk(500, function ($pages) use ($roles) {
$this->createManyJointPermissions($pages, $roles);
});
}
/**
* Create the entity jointPermissions for a particular entity.
* @param Entity $entity
*/
public function buildJointPermissionsForEntity(Entity $entity)
{
$roles = $this->role->with('jointPermissions')->get();
$entities = collect([$entity]);
if ($entity->isA('book')) {
$entities = $entities->merge($entity->chapters);
$entities = $entities->merge($entity->pages);
} elseif ($entity->isA('chapter')) {
$entities = $entities->merge($entity->pages);
}
$this->deleteManyJointPermissionsForEntities($entities);
$this->createManyJointPermissions($entities, $roles);
}
/**
* Build the entity jointPermissions for a particular role.
* @param Role $role
*/
public function buildJointPermissionForRole(Role $role)
{
$roles = collect([$role]);
$this->deleteManyJointPermissionsForRoles($roles);
// Chunk through all books
$this->book->with('permissions')->chunk(500, function ($books) use ($roles) {
$this->createManyJointPermissions($books, $roles);
});
// Chunk through all chapters
$this->chapter->with('book', 'permissions')->chunk(500, function ($books) use ($roles) {
$this->createManyJointPermissions($books, $roles);
});
// Chunk through all pages
$this->page->with('book', 'chapter', 'permissions')->chunk(500, function ($books) use ($roles) {
$this->createManyJointPermissions($books, $roles);
});
}
/**
* Delete the entity jointPermissions attached to a particular role.
* @param Role $role
*/
public function deleteJointPermissionsForRole(Role $role)
{
$this->deleteManyJointPermissionsForRoles([$role]);
}
/**
* Delete all of the entity jointPermissions for a list of entities.
* @param Role[] $roles
*/
protected function deleteManyJointPermissionsForRoles($roles)
{
foreach ($roles as $role) {
$role->jointPermissions()->delete();
}
}
/**
* Delete the entity jointPermissions for a particular entity.
* @param Entity $entity
*/
public function deleteJointPermissionsForEntity(Entity $entity)
{
$this->deleteManyJointPermissionsForEntities([$entity]);
}
/**
* Delete all of the entity jointPermissions for a list of entities.
* @param Entity[] $entities
*/
protected function deleteManyJointPermissionsForEntities($entities)
{
foreach ($entities as $entity) {
$entity->jointPermissions()->delete();
}
}
/**
* Create & Save entity jointPermissions for many entities and jointPermissions.
* @param Collection $entities
* @param Collection $roles
*/
protected function createManyJointPermissions($entities, $roles)
{
$jointPermissions = [];
foreach ($entities as $entity) {
foreach ($roles as $role) {
foreach ($this->getActions($entity) as $action) {
$jointPermissions[] = $this->createJointPermissionData($entity, $role, $action);
}
}
}
$this->jointPermission->insert($jointPermissions);
}
/**
* Get the actions related to an entity.
* @param $entity
* @return array
*/
protected function getActions($entity)
{
$baseActions = ['view', 'update', 'delete'];
if ($entity->isA('chapter')) {
$baseActions[] = 'page-create';
} else if ($entity->isA('book')) {
$baseActions[] = 'page-create';
$baseActions[] = 'chapter-create';
}
return $baseActions;
}
/**
* Create entity permission data for an entity and role
* for a particular action.
* @param Entity $entity
* @param Role $role
* @param $action
* @return array
*/
protected function createJointPermissionData(Entity $entity, Role $role, $action)
{
$permissionPrefix = (strpos($action, '-') === false ? ($entity->getType() . '-') : '') . $action;
$roleHasPermission = $role->hasPermission($permissionPrefix . '-all');
$roleHasPermissionOwn = $role->hasPermission($permissionPrefix . '-own');
$explodedAction = explode('-', $action);
$restrictionAction = end($explodedAction);
if ($entity->isA('book')) {
if (!$entity->restricted) {
return $this->createJointPermissionDataArray($entity, $role, $action, $roleHasPermission, $roleHasPermissionOwn);
} else {
$hasAccess = $entity->hasActiveRestriction($role->id, $restrictionAction);
return $this->createJointPermissionDataArray($entity, $role, $action, $hasAccess, $hasAccess);
}
} elseif ($entity->isA('chapter')) {
if (!$entity->restricted) {
$hasExplicitAccessToBook = $entity->book->hasActiveRestriction($role->id, $restrictionAction);
$hasPermissiveAccessToBook = !$entity->book->restricted;
return $this->createJointPermissionDataArray($entity, $role, $action,
($hasExplicitAccessToBook || ($roleHasPermission && $hasPermissiveAccessToBook)),
($hasExplicitAccessToBook || ($roleHasPermissionOwn && $hasPermissiveAccessToBook)));
} else {
$hasAccess = $entity->hasActiveRestriction($role->id, $restrictionAction);
return $this->createJointPermissionDataArray($entity, $role, $action, $hasAccess, $hasAccess);
}
} elseif ($entity->isA('page')) {
if (!$entity->restricted) {
$hasExplicitAccessToBook = $entity->book->hasActiveRestriction($role->id, $restrictionAction);
$hasPermissiveAccessToBook = !$entity->book->restricted;
$hasExplicitAccessToChapter = $entity->chapter && $entity->chapter->hasActiveRestriction($role->id, $restrictionAction);
$hasPermissiveAccessToChapter = $entity->chapter && !$entity->chapter->restricted;
$acknowledgeChapter = ($entity->chapter && $entity->chapter->restricted);
$hasExplicitAccessToParents = $acknowledgeChapter ? $hasExplicitAccessToChapter : $hasExplicitAccessToBook;
$hasPermissiveAccessToParents = $acknowledgeChapter ? $hasPermissiveAccessToChapter : $hasPermissiveAccessToBook;
return $this->createJointPermissionDataArray($entity, $role, $action,
($hasExplicitAccessToParents || ($roleHasPermission && $hasPermissiveAccessToParents)),
($hasExplicitAccessToParents || ($roleHasPermissionOwn && $hasPermissiveAccessToParents))
);
} else {
$hasAccess = $entity->hasRestriction($role->id, $action);
return $this->createJointPermissionDataArray($entity, $role, $action, $hasAccess, $hasAccess);
}
}
}
/**
* Create an array of data with the information of an entity jointPermissions.
* Used to build data for bulk insertion.
* @param Entity $entity
* @param Role $role
* @param $action
* @param $permissionAll
* @param $permissionOwn
* @return array
*/
protected function createJointPermissionDataArray(Entity $entity, Role $role, $action, $permissionAll, $permissionOwn)
{
$entityClass = get_class($entity);
return [
'role_id' => $role->getRawAttribute('id'),
'entity_id' => $entity->getRawAttribute('id'),
'entity_type' => $entityClass,
'action' => $action,
'has_permission' => $permissionAll,
'has_permission_own' => $permissionOwn,
'created_by' => $entity->getRawAttribute('created_by')
];
}
/**
* Checks if an entity has a restriction set upon it.
* @param Entity $entity
* @param $permission
* @return bool
*/
public function checkEntityUserAccess(Entity $entity, $permission)
{
if ($this->isAdmin) return true;
$explodedPermission = explode('-', $permission);
$baseQuery = $entity->where('id', '=', $entity->id);
$action = end($explodedPermission);
$this->currentAction = $action;
$nonJointPermissions = ['restrictions'];
// Handle non entity specific jointPermissions
if (in_array($explodedPermission[0], $nonJointPermissions)) {
$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 === $entity->created_by;
return ($allPermission || ($isOwner && $ownPermission));
}
// Handle abnormal create jointPermissions
if ($action === 'create') {
$this->currentAction = $permission;
}
return $this->entityRestrictionQuery($baseQuery)->count() > 0;
}
/**
* Check if an entity has restrictions set on itself or its
* parent tree.
* @param 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)
{
return $query->where(function ($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);
});
});
});
});
}
/**
* Add restrictions for a page query
* @param $query
* @param string $action
* @return mixed
*/
public function enforcePageRestrictions($query, $action = 'view')
{
// 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);
});
}
});
return $this->enforceEntityRestrictions($query, $action);
}
/**
* Add on permission restrictions to a chapter query.
* @param $query
* @param string $action
* @return mixed
*/
public function enforceChapterRestrictions($query, $action = 'view')
{
return $this->enforceEntityRestrictions($query, $action);
}
/**
* Add restrictions to a book query.
* @param $query
* @param string $action
* @return mixed
*/
public function enforceBookRestrictions($query, $action = 'view')
{
return $this->enforceEntityRestrictions($query, $action);
}
/**
* Add restrictions for a generic entity
* @param $query
* @param string $action
* @return mixed
*/
public function enforceEntityRestrictions($query, $action = 'view')
{
if ($this->isAdmin) 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) return $query;
$this->currentAction = 'view';
$tableDetails = ['tableName' => $tableName, 'entityIdColumn' => $entityIdColumn, 'entityTypeColumn' => $entityTypeColumn];
return $query->where(function ($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);
});
});
});
});
}
/**
* 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) return $query;
$this->currentAction = 'view';
$tableDetails = ['tableName' => $tableName, 'entityIdColumn' => $entityIdColumn];
return $query->where(function ($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);
});
}
}