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Improve PolicyFilter and PolicyQuery
Summary: - Allow PolicyQuery to require specific sets of capabilities other than "CAN_VIEW", like edit, etc. The default set is "view". - Add some convenience methods to PolicyFilter to test for capabilities. Test Plan: Viewed pastes, projects, etc. Used other stuff in future diff. Reviewers: vrana, btrahan Reviewed By: btrahan CC: aran Maniphest Tasks: T603 Differential Revision: https://secure.phabricator.com/D3212
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2 changed files with 140 additions and 57 deletions
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@ -20,16 +20,52 @@ final class PhabricatorPolicyFilter {
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private $viewer;
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private $objects;
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private $capability;
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private $capabilities;
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private $raisePolicyExceptions;
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public static function mustRetainCapability(
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PhabricatorUser $user,
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PhabricatorPolicyInterface $object,
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$capability) {
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if (!self::hasCapability($user, $object, $capability)) {
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throw new Exception(
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"You can not make that edit, because it would remove your ability ".
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"to '{$capability}' the object.");
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}
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}
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public static function requireCapability(
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PhabricatorUser $user,
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PhabricatorPolicyInterface $object,
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$capability) {
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$filter = new PhabricatorPolicyFilter();
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$filter->setViewer($user);
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$filter->requireCapabilities(array($capability));
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$filter->raisePolicyExceptions(true);
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$filter->apply(array($object));
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}
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public static function hasCapability(
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PhabricatorUser $user,
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PhabricatorPolicyInterface $object,
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$capability) {
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$filter = new PhabricatorPolicyFilter();
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$filter->setViewer($user);
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$filter->requireCapabilities(array($capability));
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$result = $filter->apply(array($object));
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return (count($result) == 1);
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}
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public function setViewer(PhabricatorUser $user) {
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$this->viewer = $user;
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return $this;
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}
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public function setCapability($capability) {
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$this->capability = $capability;
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public function requireCapabilities(array $capabilities) {
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$this->capabilities = $capabilities;
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return $this;
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}
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@ -41,91 +77,121 @@ final class PhabricatorPolicyFilter {
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public function apply(array $objects) {
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assert_instances_of($objects, 'PhabricatorPolicyInterface');
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$viewer = $this->viewer;
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$capability = $this->capability;
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$viewer = $this->viewer;
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$capabilities = $this->capabilities;
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if (!$viewer || !$capability) {
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if (!$viewer || !$capabilities) {
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throw new Exception(
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'Call setViewer() and setCapability() before apply()!');
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'Call setViewer() and requireCapabilities() before apply()!');
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}
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$filtered = array();
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foreach ($objects as $key => $object) {
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$object_capabilities = $object->getCapabilities();
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foreach ($capabilities as $capability) {
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if (!in_array($capability, $object_capabilities)) {
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throw new Exception(
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"Testing for capability '{$capability}' on an object which does ".
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"not have that capability!");
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}
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if (!in_array($capability, $object_capabilities)) {
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throw new Exception(
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"Testing for capability '{$capability}' on an object which does not ".
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"have that capability!");
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}
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if ($object->hasAutomaticCapability($capability, $this->viewer)) {
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$filtered[$key] = $object;
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continue;
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}
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$policy = $object->getPolicy($capability);
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// If the object is set to "public" but that policy is disabled for this
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// install, restrict the policy to "user".
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if ($policy == PhabricatorPolicies::POLICY_PUBLIC) {
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if (!PhabricatorEnv::getEnvConfig('policy.allow-public')) {
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$policy = PhabricatorPolicies::POLICY_USER;
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if (!$this->checkCapability($object, $capability)) {
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// If we're missing any capability, move on to the next object.
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continue 2;
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}
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}
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switch ($policy) {
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case PhabricatorPolicies::POLICY_PUBLIC:
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$filtered[$key] = $object;
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break;
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case PhabricatorPolicies::POLICY_USER:
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if ($viewer->getPHID()) {
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$filtered[$key] = $object;
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} else {
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$this->rejectObject($object, $policy);
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}
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break;
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case PhabricatorPolicies::POLICY_ADMIN:
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if ($viewer->getIsAdmin()) {
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$filtered[$key] = $object;
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} else {
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$this->rejectObject($object, $policy);
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}
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break;
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case PhabricatorPolicies::POLICY_NOONE:
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$this->rejectObject($object, $policy);
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break;
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default:
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throw new Exception("Object has unknown policy '{$policy}'!");
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}
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// If we make it here, we have all of the required capabilities.
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$filtered[$key] = $object;
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}
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return $filtered;
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}
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private function rejectObject($object, $policy) {
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private function checkCapability(
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PhabricatorPolicyInterface $object,
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$capability) {
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$policy = $object->getPolicy($capability);
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if (!$policy) {
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// TODO: Formalize this somehow?
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$policy = PhabricatorPolicies::POLICY_USER;
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}
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if ($policy == PhabricatorPolicies::POLICY_PUBLIC) {
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// If the object is set to "public" but that policy is disabled for this
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// install, restrict the policy to "user".
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if (!PhabricatorEnv::getEnvConfig('policy.allow-public')) {
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$policy = PhabricatorPolicies::POLICY_USER;
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}
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// If the object is set to "public" but the capability is anything other
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// than "view", restrict the policy to "user".
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if ($capability != PhabricatorPolicyCapability::CAN_VIEW) {
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$policy = PhabricatorPolicies::POLICY_USER;
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}
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}
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$viewer = $this->viewer;
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if ($object->hasAutomaticCapability($capability, $viewer)) {
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return true;
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}
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switch ($policy) {
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case PhabricatorPolicies::POLICY_PUBLIC:
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return true;
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case PhabricatorPolicies::POLICY_USER:
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if ($viewer->getPHID()) {
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return true;
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} else {
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$this->rejectObject($object, $policy, $capability);
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}
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break;
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case PhabricatorPolicies::POLICY_ADMIN:
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if ($viewer->getIsAdmin()) {
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return true;
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} else {
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$this->rejectObject($object, $policy, $capability);
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}
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break;
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case PhabricatorPolicies::POLICY_NOONE:
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$this->rejectObject($object, $policy, $capability);
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break;
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default:
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throw new Exception("Object has unknown policy '{$policy}'!");
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}
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return false;
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}
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private function rejectObject($object, $policy, $capability) {
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if (!$this->raisePolicyExceptions) {
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return;
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}
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$message = "You do not have permission to view this object.";
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// TODO: clean this up
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$verb = $capability;
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$message = "You do not have permission to {$verb} this object.";
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switch ($policy) {
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case PhabricatorPolicies::POLICY_PUBLIC:
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$who = "This is curious, since anyone can view the object.";
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$who = "This is curious, since anyone can {$verb} the object.";
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break;
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case PhabricatorPolicies::POLICY_USER:
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$who = "To view this object, you must be logged in.";
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$who = "To {$verb} this object, you must be logged in.";
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break;
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case PhabricatorPolicies::POLICY_ADMIN:
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$who = "To view this object, you must be an administrator.";
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$who = "To {$verb} this object, you must be an administrator.";
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break;
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case PhabricatorPolicies::POLICY_NOONE:
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$who = "No one can view this object.";
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$who = "No one can {$verb} this object.";
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break;
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default:
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$who = "It is unclear who can view this object.";
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$who = "It is unclear who can {$verb} this object.";
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break;
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}
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@ -46,6 +46,7 @@ abstract class PhabricatorPolicyQuery extends PhabricatorOffsetPagedQuery {
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private $viewer;
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private $raisePolicyExceptions;
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private $rawResultLimit;
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private $capabilities;
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/* -( Query Configuration )------------------------------------------------ */
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@ -77,6 +78,15 @@ abstract class PhabricatorPolicyQuery extends PhabricatorOffsetPagedQuery {
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}
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/**
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* @task config
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*/
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final public function requireCapabilities(array $capabilities) {
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$this->capabilities = $capabilities;
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return $this;
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}
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/* -( Query Execution )---------------------------------------------------- */
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@ -145,8 +155,15 @@ abstract class PhabricatorPolicyQuery extends PhabricatorOffsetPagedQuery {
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$filter = new PhabricatorPolicyFilter();
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$filter->setViewer($this->viewer);
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$filter->setCapability(PhabricatorPolicyCapability::CAN_VIEW);
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if (!$this->capabilities) {
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$capabilities = array(
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PhabricatorPolicyCapability::CAN_VIEW,
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);
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} else {
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$capabilities = $this->capabilities;
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}
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$filter->requireCapabilities($capabilities);
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$filter->raisePolicyExceptions($this->raisePolicyExceptions);
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$offset = (int)$this->getOffset();
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