2022-07-12 20:38:11 +02:00
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<?php
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namespace BookStack\Auth\Permissions;
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use BookStack\Auth\Role;
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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 Illuminate\Database\Eloquent\Builder;
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use Illuminate\Database\Eloquent\Collection as EloquentCollection;
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use Illuminate\Support\Facades\DB;
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2022-07-16 22:50:42 +02:00
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/**
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* Joint permissions provide a pre-query "cached" table of view permissions for all core entity
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* types for all roles in the system. This class generates out that table for different scenarios.
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*/
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2022-07-12 20:38:11 +02:00
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class JointPermissionBuilder
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{
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2022-07-12 21:15:41 +02:00
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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 rebuildForAll()
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{
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JointPermission::query()->truncate();
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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', 'owned_by'])
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->chunk(50, function (EloquentCollection $shelves) use ($roles) {
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$this->createManyJointPermissions($shelves->all(), $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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*/
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public function rebuildForEntity(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()->with('permissions')->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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* Build the entity jointPermissions for a particular role.
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*/
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public function rebuildForRole(Role $role)
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{
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$roles = [$role];
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$role->jointPermissions()->delete();
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2022-07-16 22:50:42 +02:00
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$role->load('permissions');
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// Chunk through all books
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$this->bookFetchQuery()->chunk(20, function ($books) use ($roles) {
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$this->buildJointPermissionsForBooks($books, $roles);
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});
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// Chunk through all bookshelves
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Bookshelf::query()->select(['id', 'owned_by'])
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->chunk(50, function ($shelves) use ($roles) {
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$this->createManyJointPermissions($shelves->all(), $roles);
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});
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}
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2022-07-12 20:38:11 +02:00
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/**
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* Get a query for fetching a book with its children.
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*/
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protected function bookFetchQuery(): Builder
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{
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return Book::query()->withTrashed()
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->select(['id', 'owned_by'])->with([
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'chapters' => function ($query) {
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$query->withTrashed()->select(['id', 'owned_by', 'book_id']);
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},
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'pages' => function ($query) {
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$query->withTrashed()->select(['id', '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 book and role combinations.
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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 collection of entities.
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*/
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protected 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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* Delete all the entity jointPermissions for a list of entities.
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*
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* @param Entity[] $entities
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*/
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protected function deleteManyJointPermissionsForEntities(array $entities)
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{
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$simpleEntities = $this->entitiesToSimpleEntities($entities);
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$idsByType = $this->entitiesToTypeIdMap($simpleEntities);
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DB::transaction(function () use ($idsByType) {
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foreach ($idsByType as $type => $ids) {
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foreach (array_chunk($ids, 1000) as $idChunk) {
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DB::table('joint_permissions')
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->where('entity_type', '=', $type)
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->whereIn('entity_id', $idChunk)
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->delete();
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}
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}
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});
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}
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2022-07-12 22:13:02 +02:00
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/**
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* @param Entity[] $entities
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2022-07-17 11:32:16 +02:00
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*
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* @return SimpleEntityData[]
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*/
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protected function entitiesToSimpleEntities(array $entities): array
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{
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$simpleEntities = [];
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foreach ($entities as $entity) {
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$simple = SimpleEntityData::fromEntity($entity);
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$simpleEntities[] = $simple;
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}
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return $simpleEntities;
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}
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2022-07-12 20:38:11 +02:00
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/**
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* Create & Save entity jointPermissions for many entities and roles.
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*
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* @param Entity[] $originalEntities
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* @param Role[] $roles
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*/
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protected function createManyJointPermissions(array $originalEntities, array $roles)
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{
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$entities = $this->entitiesToSimpleEntities($originalEntities);
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$jointPermissions = [];
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// Fetch related entity permissions
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$permissions = new MassEntityPermissionEvaluator($entities, 'view');
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// Create a mapping of role permissions
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$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 $role) {
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$jp = $this->createJointPermissionData(
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$entity,
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$role->getRawAttribute('id'),
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$permissions,
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$rolePermissionMap,
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$role->system_name === 'admin'
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);
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$jointPermissions[] = $jp;
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}
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}
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DB::transaction(function () use ($jointPermissions) {
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foreach (array_chunk($jointPermissions, 1000) as $jointPermissionChunk) {
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DB::table('joint_permissions')->insert($jointPermissionChunk);
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}
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});
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}
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/**
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* From the given entity list, provide back a mapping of entity types to
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* the ids of that given type. The type used is the DB morph class.
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*
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* @param SimpleEntityData[] $entities
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*
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* @return array<string, int[]>
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*/
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protected function entitiesToTypeIdMap(array $entities): array
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{
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$idsByType = [];
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foreach ($entities as $entity) {
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if (!isset($idsByType[$entity->type])) {
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$idsByType[$entity->type] = [];
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}
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$idsByType[$entity->type][] = $entity->id;
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}
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return $idsByType;
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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(SimpleEntityData $entity, int $roleId, MassEntityPermissionEvaluator $permissionMap, array $rolePermissionMap, bool $isAdminRole): array
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{
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// Ensure system admin role retains permissions
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if ($isAdminRole) {
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return $this->createJointPermissionDataArray($entity, $roleId, true, true);
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}
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// Return evaluated entity permission status if it has an affect.
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$entityPermissionStatus = $permissionMap->evaluateEntityForRole($entity, $roleId);
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if ($entityPermissionStatus !== null) {
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return $this->createJointPermissionDataArray($entity, $roleId, $entityPermissionStatus, $entityPermissionStatus);
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}
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// Otherwise default to the role-level permissions
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$permissionPrefix = $entity->type . '-view';
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$roleHasPermission = isset($rolePermissionMap[$roleId . ':' . $permissionPrefix . '-all']);
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$roleHasPermissionOwn = isset($rolePermissionMap[$roleId . ':' . $permissionPrefix . '-own']);
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return $this->createJointPermissionDataArray($entity, $roleId, $roleHasPermission, $roleHasPermissionOwn);
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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(SimpleEntityData $entity, int $roleId, bool $permissionAll, bool $permissionOwn): array
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{
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return [
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'entity_id' => $entity->id,
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'entity_type' => $entity->type,
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'has_permission' => $permissionAll,
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'has_permission_own' => $permissionOwn,
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'owned_by' => $entity->owned_by,
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'role_id' => $roleId,
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];
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}
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}
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