3 namespace BookStack\Auth\Permissions;
5 use BookStack\Auth\Role;
6 use BookStack\Auth\User;
7 use BookStack\Entities\Models\Chapter;
8 use BookStack\Entities\Models\Entity;
9 use BookStack\Entities\Models\Page;
11 use BookStack\Traits\HasCreatorAndUpdater;
12 use BookStack\Traits\HasOwner;
13 use Illuminate\Database\Eloquent\Builder;
14 use Illuminate\Database\Query\Builder as QueryBuilder;
15 use InvalidArgumentException;
17 class PermissionApplicator
20 * Checks if an entity has a restriction set upon it.
22 * @param HasCreatorAndUpdater|HasOwner $ownable
24 public function checkOwnableUserAccess(Model $ownable, string $permission): bool
26 $explodedPermission = explode('-', $permission);
27 $action = $explodedPermission[1] ?? $explodedPermission[0];
28 $fullPermission = count($explodedPermission) > 1 ? $permission : $ownable->getMorphClass() . '-' . $permission;
30 $user = $this->currentUser();
31 $userRoleIds = $this->getCurrentUserRoleIds();
33 $allRolePermission = $user->can($fullPermission . '-all');
34 $ownRolePermission = $user->can($fullPermission . '-own');
35 $nonJointPermissions = ['restrictions', 'image', 'attachment', 'comment'];
36 $ownerField = ($ownable instanceof Entity) ? 'owned_by' : 'created_by';
37 $ownableFieldVal = $ownable->getAttribute($ownerField);
39 if (is_null($ownableFieldVal)) {
40 throw new InvalidArgumentException("{$ownerField} field used but has not been loaded");
43 $isOwner = $user->id === $ownableFieldVal;
44 $hasRolePermission = $allRolePermission || ($isOwner && $ownRolePermission);
46 // Handle non entity specific jointPermissions
47 if (in_array($explodedPermission[0], $nonJointPermissions)) {
48 return $hasRolePermission;
51 $hasApplicableEntityPermissions = $this->hasEntityPermission($ownable, $userRoleIds, $user->id, $action);
53 return is_null($hasApplicableEntityPermissions) ? $hasRolePermission : $hasApplicableEntityPermissions;
57 * Check if there are permissions that are applicable for the given entity item, action and roles.
58 * Returns null when no entity permissions are in force.
60 protected function hasEntityPermission(Entity $entity, array $userRoleIds, int $userId, string $action): ?bool
62 $this->ensureValidEntityAction($action);
64 $adminRoleId = Role::getSystemRole('admin')->id;
65 if (in_array($adminRoleId, $userRoleIds)) {
69 // The chain order here is very important due to the fact we walk up the chain
70 // in the loop below. Earlier items in the chain have higher priority.
72 if ($entity instanceof Page && $entity->chapter_id) {
73 $chain[] = $entity->chapter;
76 if ($entity instanceof Page || $entity instanceof Chapter) {
77 $chain[] = $entity->book;
80 foreach ($chain as $currentEntity) {
81 $relevantPermissions = $currentEntity->permissions()
82 ->where(function (Builder $query) use ($userRoleIds, $userId) {
83 $query->whereIn('role_id', $userRoleIds)
84 ->orWhere('user_id', '=', $userId)
85 ->orWhere(function (Builder $query) {
86 $query->whereNull(['role_id', 'user_id']);
89 ->get(['role_id', 'user_id', $action])
92 // Permissions work on specificity, in order of:
93 // 1. User-specific permissions
94 // 2. Role-specific permissions
95 // 3. Fallback-specific permissions
96 // For role permissions, the system tries to be fairly permissive, in that if the user has two roles,
97 // one lacking and one permitting an action, they will be permitted.
99 // If the default is set, we have to return something here.
101 foreach ($relevantPermissions as $permission) {
102 $allowedById[($permission->role_id ?? '') . ':' . ($permission->user_id ?? '')] = $permission->$action;
105 // Continue up the chain if no applicable entity permission overrides.
106 if (empty($allowedById)) {
110 // If we have user-specific permissions set, return the status of that
111 // since it's the most specific possible.
112 $userKey = ':' . $userId;
113 if (isset($allowedById[$userKey])) {
114 return $allowedById[$userKey];
117 // If we have role-specific permissions set, allow if any of those
118 // role permissions allow access.
119 $hasDefault = isset($allowedById[':']);
120 if (!$hasDefault || count($allowedById) > 1) {
121 foreach ($allowedById as $key => $allowed) {
122 if ($key !== ':' && $allowed) {
129 // Otherwise, return the default "Other roles" fallback value.
130 return $allowedById[':'];
137 * Checks if a user has the given permission for any items in the system.
138 * Can be passed an entity instance to filter on a specific type.
140 public function checkUserHasEntityPermissionOnAny(string $action, string $entityClass = ''): bool
142 $this->ensureValidEntityAction($action);
144 $permissionQuery = EntityPermission::query()
145 ->where($action, '=', true)
146 ->where(function (Builder $query) {
147 $query->whereIn('role_id', $this->getCurrentUserRoleIds())
148 ->orWhere('user_id', '=', $this->currentUser()->id);
151 if (!empty($entityClass)) {
152 /** @var Entity $entityInstance */
153 $entityInstance = app()->make($entityClass);
154 $permissionQuery = $permissionQuery->where('entity_type', '=', $entityInstance->getMorphClass());
157 $hasPermission = $permissionQuery->count() > 0;
159 return $hasPermission;
163 * Limit the given entity query so that the query will only
164 * return items that the user has view permission for.
166 public function restrictEntityQuery(Builder $query): Builder
168 return $query->where(function (Builder $parentQuery) {
169 $parentQuery->whereHas('jointPermissions', function (Builder $permissionQuery) {
170 $permissionQuery->whereIn('role_id', $this->getCurrentUserRoleIds())
171 ->where(function (Builder $query) {
172 $this->addJointHasPermissionCheck($query, $this->currentUser()->id);
174 })->orWhereHas('jointUserPermissions', function (Builder $query) {
175 $query->where('user_id', '=', $this->currentUser()->id)->where('has_permission', '=', true);
177 })->whereDoesntHave('jointUserPermissions', function (Builder $query) {
178 $query->where('user_id', '=', $this->currentUser()->id)->where('has_permission', '=', false);
183 * Extend the given page query to ensure draft items are not visible
184 * unless created by the given user.
186 public function restrictDraftsOnPageQuery(Builder $query): Builder
188 return $query->where(function (Builder $query) {
189 $query->where('draft', '=', false)
190 ->orWhere(function (Builder $query) {
191 $query->where('draft', '=', true)
192 ->where('owned_by', '=', $this->currentUser()->id);
198 * Filter items that have entities set as a polymorphic relation.
199 * For simplicity, this will not return results attached to draft pages.
200 * Draft pages should never really have related items though.
202 * @param Builder|QueryBuilder $query
204 public function restrictEntityRelationQuery($query, string $tableName, string $entityIdColumn, string $entityTypeColumn)
206 $tableDetails = ['tableName' => $tableName, 'entityIdColumn' => $entityIdColumn, 'entityTypeColumn' => $entityTypeColumn];
207 $pageMorphClass = (new Page())->getMorphClass();
209 $q = $query->where(function ($query) use ($tableDetails) {
210 $query->whereExists(function ($permissionQuery) use ($tableDetails) {
211 /** @var Builder $permissionQuery */
212 $permissionQuery->select(['role_id'])->from('joint_permissions')
213 ->whereColumn('joint_permissions.entity_id', '=', $tableDetails['tableName'] . '.' . $tableDetails['entityIdColumn'])
214 ->whereColumn('joint_permissions.entity_type', '=', $tableDetails['tableName'] . '.' . $tableDetails['entityTypeColumn'])
215 ->whereIn('joint_permissions.role_id', $this->getCurrentUserRoleIds())
216 ->where(function (QueryBuilder $query) {
217 $this->addJointHasPermissionCheck($query, $this->currentUser()->id);
219 })->orWhereExists(function ($permissionQuery) use ($tableDetails) {
220 /** @var Builder $permissionQuery */
221 $permissionQuery->select(['user_id'])->from('joint_user_permissions')
222 ->whereColumn('joint_user_permissions.entity_id', '=', $tableDetails['tableName'] . '.' . $tableDetails['entityIdColumn'])
223 ->whereColumn('joint_user_permissions.entity_type', '=', $tableDetails['tableName'] . '.' . $tableDetails['entityTypeColumn'])
224 ->where('joint_user_permissions.user_id', '=', $this->currentUser()->id)
225 ->where('joint_user_permissions.has_permission', '=', true);
227 })->whereNotExists(function ($query) use ($tableDetails) {
228 $query->select(['user_id'])->from('joint_user_permissions')
229 ->whereColumn('joint_user_permissions.entity_id', '=', $tableDetails['tableName'] . '.' . $tableDetails['entityIdColumn'])
230 ->whereColumn('joint_user_permissions.entity_type', '=', $tableDetails['tableName'] . '.' . $tableDetails['entityTypeColumn'])
231 ->where('joint_user_permissions.user_id', '=', $this->currentUser()->id)
232 ->where('joint_user_permissions.has_permission', '=', false);
233 })->where(function ($query) use ($tableDetails, $pageMorphClass) {
234 /** @var Builder $query */
235 $query->where($tableDetails['entityTypeColumn'], '!=', $pageMorphClass)
236 ->orWhereExists(function (QueryBuilder $query) use ($tableDetails, $pageMorphClass) {
237 $query->select('id')->from('pages')
238 ->whereColumn('pages.id', '=', $tableDetails['tableName'] . '.' . $tableDetails['entityIdColumn'])
239 ->where($tableDetails['tableName'] . '.' . $tableDetails['entityTypeColumn'], '=', $pageMorphClass)
240 ->where('pages.draft', '=', false);
248 * Add conditions to a query for a model that's a relation of a page, so only the model results
249 * on visible pages are returned by the query.
250 * Is effectively the same as "restrictEntityRelationQuery" but takes into account page drafts
251 * while not expecting a polymorphic relation, Just a simpler one-page-to-many-relations set-up.
253 public function restrictPageRelationQuery(Builder $query, string $tableName, string $pageIdColumn): Builder
255 $fullPageIdColumn = $tableName . '.' . $pageIdColumn;
256 $morphClass = (new Page())->getMorphClass();
258 $existsQuery = function ($permissionQuery) use ($fullPageIdColumn, $morphClass) {
259 /** @var Builder $permissionQuery */
260 $permissionQuery->select('joint_permissions.role_id')->from('joint_permissions')
261 ->whereColumn('joint_permissions.entity_id', '=', $fullPageIdColumn)
262 ->where('joint_permissions.entity_type', '=', $morphClass)
263 ->whereIn('joint_permissions.role_id', $this->getCurrentUserRoleIds())
264 ->where(function (QueryBuilder $query) {
265 $this->addJointHasPermissionCheck($query, $this->currentUser()->id);
269 $userExistsQuery = function ($hasPermission) use ($fullPageIdColumn, $morphClass) {
270 return function ($permissionQuery) use ($fullPageIdColumn, $morphClass) {
271 /** @var Builder $permissionQuery */
272 $permissionQuery->select('joint_user_permissions.user_id')->from('joint_user_permissions')
273 ->whereColumn('joint_user_permissions.entity_id', '=', $fullPageIdColumn)
274 ->where('joint_user_permissions.entity_type', '=', $morphClass)
275 ->where('joint_user_permissions.user_id', $this->currentUser()->id)
276 ->where('has_permission', '=', true);
280 $q = $query->where(function ($query) use ($existsQuery, $userExistsQuery, $fullPageIdColumn) {
281 $query->whereExists($existsQuery)
282 ->orWhereExists($userExistsQuery(true))
283 ->orWhere($fullPageIdColumn, '=', 0);
284 })->whereNotExists($userExistsQuery(false));
286 // Prevent visibility of non-owned draft pages
287 $q->whereExists(function (QueryBuilder $query) use ($fullPageIdColumn) {
288 $query->select('id')->from('pages')
289 ->whereColumn('pages.id', '=', $fullPageIdColumn)
290 ->where(function (QueryBuilder $query) {
291 $query->where('pages.draft', '=', false)
292 ->orWhere('pages.owned_by', '=', $this->currentUser()->id);
300 * Add the query for checking the given user id has permission
301 * within the join_permissions table.
303 * @param QueryBuilder|Builder $query
305 protected function addJointHasPermissionCheck($query, int $userIdToCheck)
307 $query->where('joint_permissions.has_permission', '=', true)->orWhere(function ($query) use ($userIdToCheck) {
308 $query->where('joint_permissions.has_permission_own', '=', true)
309 ->where('joint_permissions.owned_by', '=', $userIdToCheck);
314 * Get the current user.
316 protected function currentUser(): User
322 * Get the roles for the current logged-in user.
326 protected function getCurrentUserRoleIds(): array
328 if (auth()->guest()) {
329 return [Role::getSystemRole('public')->id];
332 return $this->currentUser()->roles->pluck('id')->values()->all();
336 * Ensure the given action is a valid and expected entity action.
337 * Throws an exception if invalid otherwise does nothing.
338 * @throws InvalidArgumentException
340 protected function ensureValidEntityAction(string $action): void
342 if (!in_array($action, EntityPermission::PERMISSIONS)) {
343 throw new InvalidArgumentException('Action should be a simple entity permission action, not a role permission');