Fix broken command transport fallback handling

application/forms/Command/CommandForm.php

@@ -5,8 +5,8 @@
 namespace Icinga\Module\Icingadb\Forms\Command;
 
 use ArrayIterator;
+use Countable;
 use Exception;
-use Generator;
 use Icinga\Application\Logger;
 use Icinga\Module\Icingadb\Command\IcingaCommand;
 use Icinga\Module\Icingadb\Command\Transport\CommandTransport;
@@ -16,6 +16,8 @@
 use ipl\Html\Form;
 use ipl\Orm\Model;
 use ipl\Web\Common\CsrfCounterMeasure;
+use Iterator;
+use IteratorIterator;
 use Traversable;
 
 abstract class CommandForm extends Form
@@ -25,7 +27,7 @@ abstract class CommandForm extends Form
 
     protected $defaultAttributes = ['class' => 'icinga-form icinga-controls'];
 
-    /** @var mixed */
+    /** @var (Traversable<Model>&Countable)|array<Model> */
     protected $objects;
 
     /** @var bool */
@@ -43,7 +45,7 @@ abstract class CommandForm extends Form
     /**
      * Set the objects to issue the command for
      *
-     * @param mixed $objects A traversable that is also countable
+     * @param (Traversable<Model>&Countable)|array<Model> $objects A traversable that is also countable
      *
      * @return $this
      */
@@ -57,7 +59,7 @@ public function setObjects($objects): self
     /**
      * Get the objects to issue the command for
      *
-     * @return mixed
+     * @return (Traversable<Model>&Countable)|array<Model>
      */
     public function getObjects()
     {
@@ -105,11 +107,11 @@ abstract protected function assembleSubmitButton();
     /**
      * Get the commands to issue for the given objects
      *
-     * @param Traversable<Model> $objects
+     * @param Iterator<Model> $objects
      *
      * @return Traversable<IcingaCommand>
      */
-    abstract protected function getCommands(Traversable $objects): Traversable;
+    abstract protected function getCommands(Iterator $objects): Traversable;
 
     protected function assemble()
     {
@@ -123,10 +125,15 @@ protected function assemble()
 
     protected function onSuccess()
     {
-        $errors = [];
         $objects = $this->getObjects();
+        if (is_array($objects)) {
+            $objects = new ArrayIterator($objects);
+        } else {
+            $objects = new IteratorIterator($objects);
+        }
 
-        foreach ($this->getCommands(is_array($objects) ? new ArrayIterator($objects) : $objects) as $command) {
+        $errors = [];
+        foreach ($this->getCommands($objects) as $command) {
             try {
                 $this->sendCommand($command);
             } catch (Exception $e) {
@@ -159,21 +166,4 @@ protected function sendCommand(IcingaCommand $command)
     {
         (new CommandTransport())->send($command);
     }
-
-    /**
-     * Yield the $objects the currently logged in user has the permission $permission for
-     *
-     * @param string      $permission
-     * @param Traversable $objects
-     *
-     * @return Generator
-     */
-    protected function filterGrantedOn(string $permission, Traversable $objects): Generator
-    {
-        foreach ($objects as $object) {
-            if ($this->isGrantedOn($permission, $object)) {
-                yield $object;
-            }
-        }
-    }
 }

application/forms/Command/Instance/ToggleInstanceFeaturesForm.php

@@ -8,6 +8,7 @@
 use Icinga\Module\Icingadb\Forms\Command\CommandForm;
 use Icinga\Web\Notification;
 use ipl\Web\FormDecorator\IcingaFormDecorator;
+use Iterator;
 use Traversable;
 
 class ToggleInstanceFeaturesForm extends CommandForm
@@ -133,7 +134,7 @@ protected function assembleSubmitButton()
     {
     }
 
-    protected function getCommands(Traversable $objects): Traversable
+    protected function getCommands(Iterator $objects): Traversable
     {
         foreach ($this->features as $feature => $spec) {
             $featureState = $this->getElement($feature)->isChecked();

application/forms/Command/Object/AcknowledgeProblemForm.php

@@ -4,6 +4,7 @@
 
 namespace Icinga\Module\Icingadb\Forms\Command\Object;
 
+use CallbackFilterIterator;
 use DateInterval;
 use DateTime;
 use Icinga\Application\Config;
@@ -14,9 +15,11 @@
 use ipl\Html\Attributes;
 use ipl\Html\HtmlElement;
 use ipl\Html\Text;
+use ipl\Orm\Model;
 use ipl\Validator\CallbackValidator;
 use ipl\Web\FormDecorator\IcingaFormDecorator;
 use ipl\Web\Widget\Icon;
+use Iterator;
 use Traversable;
 
 use function ipl\Stdlib\iterable_value_first;
@@ -186,10 +189,13 @@ protected function assembleSubmitButton()
         (new IcingaFormDecorator())->decorate($this->getElement('btn_submit'));
     }
 
-    protected function getCommands(Traversable $objects): Traversable
+    protected function getCommands(Iterator $objects): Traversable
     {
-        $granted = $this->filterGrantedOn('icingadb/command/acknowledge-problem', $objects);
+        $granted = new CallbackFilterIterator($objects, function (Model $object): bool {
+            return $this->isGrantedOn('icingadb/command/acknowledge-problem', $object);
+        });
 
+        $granted->rewind(); // Forwards the pointer to the first element
         if ($granted->valid()) {
             $command = new AcknowledgeProblemCommand();
             $command->setObjects($granted);

application/forms/Command/Object/AddCommentForm.php

@@ -4,6 +4,7 @@
 
 namespace Icinga\Module\Icingadb\Forms\Command\Object;
 
+use CallbackFilterIterator;
 use DateInterval;
 use DateTime;
 use Icinga\Application\Config;
@@ -14,9 +15,11 @@
 use ipl\Html\Attributes;
 use ipl\Html\HtmlElement;
 use ipl\Html\Text;
+use ipl\Orm\Model;
 use ipl\Validator\CallbackValidator;
 use ipl\Web\FormDecorator\IcingaFormDecorator;
 use ipl\Web\Widget\Icon;
+use Iterator;
 use Traversable;
 
 use function ipl\Stdlib\iterable_value_first;
@@ -141,10 +144,13 @@ protected function assembleSubmitButton()
         (new IcingaFormDecorator())->decorate($this->getElement('btn_submit'));
     }
 
-    protected function getCommands(Traversable $objects): Traversable
+    protected function getCommands(Iterator $objects): Traversable
     {
-        $granted = $this->filterGrantedOn('icingadb/command/comment/add', $objects);
+        $granted = new CallbackFilterIterator($objects, function (Model $object): bool {
+            return $this->isGrantedOn('icingadb/command/comment/add', $object);
+        });
 
+        $granted->rewind(); // Forwards the pointer to the first element
         if ($granted->valid()) {
             $command = new AddCommentCommand();
             $command->setObjects($granted);

application/forms/Command/Object/CheckNowForm.php

@@ -4,11 +4,13 @@
 
 namespace Icinga\Module\Icingadb\Forms\Command\Object;
 
-use Generator;
+use CallbackFilterIterator;
 use Icinga\Module\Icingadb\Command\Object\ScheduleCheckCommand;
 use Icinga\Module\Icingadb\Forms\Command\CommandForm;
 use Icinga\Web\Notification;
+use ipl\Orm\Model;
 use ipl\Web\Widget\Icon;
+use Iterator;
 use Traversable;
 
 class CheckNowForm extends CommandForm
@@ -44,22 +46,17 @@ protected function assembleSubmitButton()
         );
     }
 
-    protected function getCommands(Traversable $objects): Traversable
+    protected function getCommands(Iterator $objects): Traversable
     {
-        $granted = (function () use ($objects): Generator {
-            foreach ($objects as $object) {
-                if (
-                    $this->isGrantedOn('icingadb/command/schedule-check', $object)
-                    || (
-                        $object->active_checks_enabled
-                        && $this->isGrantedOn('icingadb/command/schedule-check/active-only', $object)
-                    )
-                ) {
-                    yield $object;
-                }
-            }
-        })();
+        $granted = new CallbackFilterIterator($objects, function (Model $object): bool {
+            return $this->isGrantedOn('icingadb/command/schedule-check', $object)
+                || (
+                    $object->active_checks_enabled
+                    && $this->isGrantedOn('icingadb/command/schedule-check/active-only', $object)
+                );
+        });
 
+        $granted->rewind(); // Forwards the pointer to the first element
         if ($granted->valid()) {
             $command = new ScheduleCheckCommand();
             $command->setObjects($granted);

application/forms/Command/Object/DeleteCommentForm.php

@@ -4,12 +4,14 @@
 
 namespace Icinga\Module\Icingadb\Forms\Command\Object;
 
-use Generator;
+use CallbackFilterIterator;
 use Icinga\Module\Icingadb\Command\Object\DeleteCommentCommand;
 use Icinga\Module\Icingadb\Forms\Command\CommandForm;
 use Icinga\Web\Notification;
+use ipl\Orm\Model;
 use ipl\Web\Common\RedirectOption;
 use ipl\Web\Widget\Icon;
+use Iterator;
 use Traversable;
 
 class DeleteCommentForm extends CommandForm
@@ -54,16 +56,13 @@ protected function assembleSubmitButton()
         );
     }
 
-    protected function getCommands(Traversable $objects): Traversable
+    protected function getCommands(Iterator $objects): Traversable
     {
-        $granted = (function () use ($objects): Generator {
-            foreach ($objects as $object) {
-                if ($this->isGrantedOn('icingadb/command/comment/delete', $object->{$object->object_type})) {
-                    yield $object;
-                }
-            }
-        })();
+        $granted = new CallbackFilterIterator($objects, function (Model $object): bool {
+            return $this->isGrantedOn('icingadb/command/comment/delete', $object->{$object->object_type});
+        });
 
+        $granted->rewind(); // Forwards the pointer to the first element
         if ($granted->valid()) {
             $command = new DeleteCommentCommand();
             $command->setObjects($granted);

application/forms/Command/Object/DeleteDowntimeForm.php

@@ -4,12 +4,14 @@
 
 namespace Icinga\Module\Icingadb\Forms\Command\Object;
 
-use Generator;
+use CallbackFilterIterator;
 use Icinga\Module\Icingadb\Command\Object\DeleteDowntimeCommand;
 use Icinga\Module\Icingadb\Forms\Command\CommandForm;
 use Icinga\Web\Notification;
+use ipl\Orm\Model;
 use ipl\Web\Common\RedirectOption;
 use ipl\Web\Widget\Icon;
+use Iterator;
 use Traversable;
 
 class DeleteDowntimeForm extends CommandForm
@@ -66,19 +68,14 @@ protected function assembleSubmitButton()
         );
     }
 
-    protected function getCommands(Traversable $objects): Traversable
+    protected function getCommands(Iterator $objects): Traversable
     {
-        $granted = (function () use ($objects): Generator {
-            foreach ($objects as $object) {
-                if (
-                    $this->isGrantedOn('icingadb/command/downtime/delete', $object->{$object->object_type})
-                    && $object->scheduled_by === null
-                ) {
-                    yield $object;
-                }
-            }
-        })();
+        $granted = new CallbackFilterIterator($objects, function (Model $object): bool {
+            return $object->scheduled_by === null
+                && $this->isGrantedOn('icingadb/command/downtime/delete', $object->{$object->object_type});
+        });
 
+        $granted->rewind(); // Forwards the pointer to the first element
         if ($granted->valid()) {
             $command = new DeleteDowntimeCommand();
             $command->setObjects($granted);

application/forms/Command/Object/ProcessCheckResultForm.php

@@ -4,7 +4,7 @@
 
 namespace Icinga\Module\Icingadb\Forms\Command\Object;
 
-use Generator;
+use CallbackFilterIterator;
 use Icinga\Module\Icingadb\Command\Object\ProcessCheckResultCommand;
 use Icinga\Module\Icingadb\Forms\Command\CommandForm;
 use Icinga\Module\Icingadb\Model\Host;
@@ -15,6 +15,7 @@
 use ipl\Orm\Model;
 use ipl\Web\FormDecorator\IcingaFormDecorator;
 use ipl\Web\Widget\Icon;
+use Iterator;
 use Traversable;
 
 use function ipl\Stdlib\iterable_value_first;
@@ -133,16 +134,14 @@ protected function assembleSubmitButton()
         (new IcingaFormDecorator())->decorate($this->getElement('btn_submit'));
     }
 
-    protected function getCommands(Traversable $objects): Traversable
+    protected function getCommands(Iterator $objects): Traversable
     {
-        $granted = (function () use ($objects): Generator {
-            foreach ($this->filterGrantedOn('icingadb/command/process-check-result', $objects) as $object) {
-                if ($object->passive_checks_enabled) {
-                    yield $object;
-                }
-            }
-        })();
+        $granted = new CallbackFilterIterator($objects, function (Model $object): bool {
+            return $object->passive_checks_enabled
+                && $this->isGrantedOn('icingadb/command/process-check-result', $object);
+        });
 
+        $granted->rewind(); // Forwards the pointer to the first element
         if ($granted->valid()) {
             $command = new ProcessCheckResultCommand();
             $command->setObjects($granted);

application/forms/Command/Object/RemoveAcknowledgementForm.php

@@ -4,11 +4,14 @@
 
 namespace Icinga\Module\Icingadb\Forms\Command\Object;
 
+use CallbackFilterIterator;
 use Icinga\Module\Icingadb\Command\Object\RemoveAcknowledgementCommand;
 use Icinga\Module\Icingadb\Forms\Command\CommandForm;
 use Icinga\Module\Icingadb\Model\Host;
 use Icinga\Web\Notification;
+use ipl\Orm\Model;
 use ipl\Web\Widget\Icon;
+use Iterator;
 use Traversable;
 
 use function ipl\Stdlib\iterable_value_first;
@@ -62,10 +65,13 @@ protected function assembleSubmitButton()
         );
     }
 
-    protected function getCommands(Traversable $objects): Traversable
+    protected function getCommands(Iterator $objects): Traversable
     {
-        $granted = $this->filterGrantedOn('icingadb/command/remove-acknowledgement', $objects);
+        $granted = new CallbackFilterIterator($objects, function (Model $object): bool {
+            return $this->isGrantedOn('icingadb/command/remove-acknowledgement', $object);
+        });
 
+        $granted->rewind(); // Forwards the pointer to the first element
         if ($granted->valid()) {
             $command = new RemoveAcknowledgementCommand();
             $command->setObjects($granted);