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<?php |
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declare(strict_types = 1); |
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namespace TYPO3\CMS\Core\Database\Query\Restriction; |
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/* |
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* This file is part of the TYPO3 CMS project. |
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* |
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* It is free software; you can redistribute it and/or modify it under |
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* the terms of the GNU General Public License, either version 2 |
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* of the License, or any later version. |
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* |
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* For the full copyright and license information, please read the |
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* LICENSE.txt file that was distributed with this source code. |
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* |
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* The TYPO3 project - inspiring people to share! |
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*/ |
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use TYPO3\CMS\Core\Context\UserAspect; |
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use TYPO3\CMS\Core\Database\Query\Expression\CompositeExpression; |
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use TYPO3\CMS\Core\Database\Query\Expression\ExpressionBuilder; |
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/** |
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* Restriction to make queries respect backend user rights for pages. |
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* |
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* Adds a WHERE-clause for the pages-table where user permissions according to input argument, $permissions, is validated. |
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* $permissions is the "mask" used to select - see Permission Bitset. |
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* E.g. if $perms is 1 then you'll get all pages that a user can actually see! |
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* 2^0 = show (1) |
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* 2^1 = edit (2) |
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* 2^2 = delete (4) |
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* 2^3 = new (8) |
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* If the user is 'admin' no validation is used. |
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* |
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* If the user is not set at all (->user is not an array), then "AND 1=0" is returned (will cause no selection results at all) |
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* |
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* The 95% use of this function is "->getPagePermsClause(1)" which will |
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* return WHERE clauses for *selecting* pages in backend listings - in other words this will check read permissions. |
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*/ |
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class PagePermissionRestriction implements QueryRestrictionInterface |
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{ |
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/** |
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* @var int |
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*/ |
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protected $permissions; |
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/** |
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* @var UserAspect |
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*/ |
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protected $userAspect; |
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public function __construct(UserAspect $userAspect, int $permissions) |
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{ |
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$this->permissions = $permissions; |
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$this->userAspect = $userAspect; |
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} |
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/** |
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* Main method to build expressions for given tables |
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* |
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* @param array $queriedTables Array of tables, where array key is table alias and value is a table name |
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* @param ExpressionBuilder $expressionBuilder Expression builder instance to add restrictions with |
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* @return CompositeExpression The result of query builder expression(s) |
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*/ |
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public function buildExpression(array $queriedTables, ExpressionBuilder $expressionBuilder): CompositeExpression |
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{ |
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$constraints = []; |
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foreach ($queriedTables as $tableAlias => $tableName) { |
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if ($tableName !== 'pages') { |
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continue; |
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} |
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$constraint = $this->buildUserConstraints($expressionBuilder, $tableAlias); |
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if ($constraint) { |
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$constraints[] = $expressionBuilder->andX($constraint); |
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} |
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} |
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return $expressionBuilder->andX(...$constraints); |
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} |
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/** |
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* @param ExpressionBuilder $expressionBuilder |
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* @param string $tableAlias |
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* @return string|CompositeExpression|null |
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* @throws \TYPO3\CMS\Core\Context\Exception\AspectPropertyNotFoundException |
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*/ |
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protected function buildUserConstraints(ExpressionBuilder $expressionBuilder, string $tableAlias) |
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{ |
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if (!$this->userAspect->isLoggedIn()) { |
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return $expressionBuilder->comparison(1, ExpressionBuilder::EQ, 0); |
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} |
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if ($this->userAspect->isAdmin()) { |
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return null; |
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} |
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// User permissions |
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$constraint = $expressionBuilder->orX( |
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$expressionBuilder->comparison( |
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$expressionBuilder->bitAnd($tableAlias . '.perms_everybody', $this->permissions), |
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ExpressionBuilder::EQ, |
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$this->permissions |
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), |
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$expressionBuilder->andX( |
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$expressionBuilder->eq($tableAlias . '.perms_userid', $this->userAspect->get('id')), |
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$expressionBuilder->comparison( |
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$expressionBuilder->bitAnd($tableAlias . '.perms_user', $this->permissions), |
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ExpressionBuilder::EQ, |
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$this->permissions |
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) |
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) |
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); |
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// User groups (if any are set) |
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$groupIds = array_map('intval', $this->userAspect->getGroupIds()); |
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if (!empty($groupIds)) { |
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$constraint->add( |
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$expressionBuilder->andX( |
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$expressionBuilder->in( |
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$tableAlias . '.perms_groupid', |
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$groupIds |
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), |
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$expressionBuilder->comparison( |
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$expressionBuilder->bitAnd($tableAlias . '.perms_group', $this->permissions), |
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ExpressionBuilder::EQ, |
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$this->permissions |
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) |
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) |
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); |
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} |
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return $constraint; |
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} |
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} |
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TYPO3 /
TYPO3.CMS
