Merge branch 'bugfix/do-not-use-count-queries-for-emptiness-checks-9632'

fixes #9632

application/views/scripts/group/list.phtml

@@ -26,7 +26,10 @@ if (! isset($backend)) {
     $reducible = $this->hasPermission('config/authentication/groups/remove') && $backend instanceof Reducible;
 }
 
-if (count($groups) > 0): ?>
+$firstRow = true;
+foreach ($groups as $group): ?>
+  <?php if ($firstRow): ?>
+    <?php $firstRow = false; ?>
 <table data-base-target="_next" class="action group-list alternating">
   <thead>
     <tr>
@@ -37,7 +40,7 @@ if (count($groups) > 0): ?>
     </tr>
   </thead>
   <tbody>
-  <?php foreach ($groups as $group): ?>
+  <?php endif ?>
     <tr>
       <td class="group-name"><?= $this->qlink($group->group_name, 'group/show', array(
         'backend'   => $backend->getName(),
@@ -62,7 +65,8 @@ if (count($groups) > 0): ?>
       </td>
      <?php endif ?>
     </tr>
-  <?php endforeach ?>
+<?php endforeach ?>
+<?php if ($groups->hasResult()): ?>
   </tbody>
 </table>
 <?php else: ?>

application/views/scripts/group/show.phtml

@@ -49,7 +49,12 @@ if ($this->hasPermission('config/authentication/groups/edit') && $backend instan
 <?php endif ?>
 </div>
 <div class="content members" data-base-target="_next">
-<?php if (count($members) > 0): ?>
+<?php
+
+$firstRow = true;
+foreach ($members as $member): ?>
+<?php if ($firstRow): ?>
+  <?php $firstRow = false; ?>
   <table data-base-target="_next" class="action member-list">
     <thead>
       <tr>
@@ -60,7 +65,7 @@ if ($this->hasPermission('config/authentication/groups/edit') && $backend instan
       </tr>
     </thead>
     <tbody>
-    <?php foreach ($members as $member): ?>
+  <?php endif ?>
       <tr>
         <td class="member-name"><?= $this->escape($member->user_name); ?></td>
        <?php if (isset($removeForm)): ?>
@@ -69,7 +74,8 @@ if ($this->hasPermission('config/authentication/groups/edit') && $backend instan
         </td>
        <?php endif ?>
       </tr>
-    <?php endforeach ?>
+<?php endforeach ?>
+<?php if ($members->hasResult()): ?>
     </tbody>
   </table>
 <?php else: ?>

application/views/scripts/user/list.phtml

@@ -26,7 +26,10 @@ if (! isset($backend)) {
     $reducible = $this->hasPermission('config/authentication/users/remove') && $backend instanceof Reducible;
 }
 
-if (count($users) > 0): ?>
+$firstRow = true;
+foreach ($users as $user): ?>
+  <?php if ($firstRow): ?>
+    <?php $firstRow = false; ?>
 <table data-base-target="_next" class="action user-list alternating">
   <thead>
     <tr>
@@ -37,7 +40,7 @@ if (count($users) > 0): ?>
     </tr>
   </thead>
   <tbody>
-  <?php foreach ($users as $user): ?>
+  <?php endif ?>
     <tr>
       <td class="user-name"><?= $this->qlink($user->user_name, 'user/show', array(
         'backend'   => $backend->getName(),
@@ -62,7 +65,8 @@ if (count($users) > 0): ?>
       </td>
      <?php endif ?>
     </tr>
-  <?php endforeach ?>
+<?php endforeach ?>
+<?php if ($users->hasResult()): ?>
   </tbody>
 </table>
 <?php else: ?>

application/views/scripts/user/show.phtml

@@ -52,7 +52,12 @@ if ($this->hasPermission('config/authentication/users/edit') && $backend instanc
 <?php endif ?>
 </div>
 <div class="content memberships">
-<?php if (count($memberships) > 0): ?>
+<?php
+
+$firstRow = true;
+foreach ($memberships as $membership): ?>
+<?php if ($firstRow): ?>
+  <?php $firstRow = false; ?>
   <table data-base-target="_next" class="action membership-list alternating">
     <thead>
       <tr>
@@ -61,7 +66,7 @@ if ($this->hasPermission('config/authentication/users/edit') && $backend instanc
       </tr>
     </thead>
     <tbody>
-    <?php foreach ($memberships as $membership): ?>
+<?php endif ?>
       <tr>
         <td class="membership-group">
          <?php if ($this->hasPermission('config/authentication/groups/show') && $membership->backend instanceof Selectable): ?>
@@ -86,7 +91,8 @@ if ($this->hasPermission('config/authentication/users/edit') && $backend instanc
        <?php endif ?>
         </td>
       </tr>
-    <?php endforeach ?>
+<?php endforeach ?>
+<?php if ($memberships->hasResult()): ?>
     </tbody>
   </table>
 <?php else: ?>

library/Icinga/Data/SimpleQuery.php

@@ -158,7 +158,7 @@ class SimpleQuery implements QueryInterface, Queryable, Iterator
         }
 
         $this->iterator->rewind();
-        $this->iteratorPosition = 0;
+        $this->iteratorPosition = null;
         Benchmark::measure('Query result iteration started');
     }
 
@@ -190,6 +190,8 @@ class SimpleQuery implements QueryInterface, Queryable, Iterator
         if (! $valid) {
             Benchmark::measure('Query result iteration finished');
             return false;
+        } elseif ($this->iteratorPosition === null) {
+            $this->iteratorPosition = 0;
         }
 
         return true;
@@ -420,6 +422,16 @@ class SimpleQuery implements QueryInterface, Queryable, Iterator
         return $this->hasMore;
     }
 
+    /**
+     * Return whether this query will or has yielded any result
+     *
+     * @return  bool
+     */
+    public function hasResult()
+    {
+        return $this->iteratorPosition !== null || $this->fetchRow() !== false;
+    }
+
     /**
      * Set a limit count and offset to the query
      *

library/Icinga/Repository/RepositoryQuery.php

@@ -367,6 +367,16 @@ class RepositoryQuery implements QueryInterface, SortRules, Iterator
         return $this->query->hasMore();
     }
 
+    /**
+     * Return whether this query will or has yielded any result
+     *
+     * @return  bool
+     */
+    public function hasResult()
+    {
+        return $this->query->hasResult();
+    }
+
     /**
      * Limit this query's results
      *

modules/monitoring/application/controllers/ListController.php

@@ -368,7 +368,7 @@ class Monitoring_ListController extends Controller
         $this->view->filter = Filter::fromQuerystring((string) $this->params);
         $query->applyFilter($this->view->filter);
         $this->applyRestriction('monitoring/filter/objects', $query);
-        $this->view->summary = $query->getQuery()->fetchAll();
+        $this->view->summary = $query;
         $this->view->column = $form->getValue('state');
 //        $this->view->orientationBox = $orientationBox;
         $this->view->orientation = $orientation;

modules/monitoring/application/views/scripts/host/history.phtml

@@ -2,6 +2,19 @@
 use Icinga\Module\Monitoring\Object\Host;
 use Icinga\Module\Monitoring\Object\Service;
 
+function contactsLink($match, $view) {
+    $links = array();
+    foreach (preg_split('/,\s/', $match[1]) as $contact) {
+        $links[] = $view->qlink(
+            $contact,
+            'monitoring/show/contact',
+            array('contact_name' => $contact),
+            array('title' => sprintf($view->translate('Show detailed information about %s'), $contact))
+        );
+    }
+    return '[' . implode(', ', $links) . ']';
+}
+
 $self = $this;
 
 if (! $this->compact): ?>
@@ -16,29 +29,6 @@ if (! $this->compact): ?>
 </div>
 <?php endif ?>
 <div class="content">
-<?php
-
-if (count($history) === 0) {
-    echo $this->translate('No history events found matching the filter') . '</div>';
-    return;
-}
-?>
-
-<?php
-function contactsLink($match, $view) {
-    $links = array();
-    foreach (preg_split('/,\s/', $match[1]) as $contact) {
-        $links[] = $view->qlink(
-            $contact,
-            'monitoring/show/contact',
-            array('contact_name' => $contact),
-            array('title' => sprintf($view->translate('Show detailed information about %s'), $contact))
-        );
-    }
-    return '[' . implode(', ', $links) . ']';
-}
-?>
-
   <table data-base-target="_next" class="action objecthistory">
     <tbody>
     <?php foreach ($history as $event): ?>
@@ -144,7 +134,10 @@ function contactsLink($match, $view) {
           </div>
         </td>
       </tr>
-<?php endforeach; ?>
+    <?php endforeach; ?>
     </tbody>
   </table>
+<?php if (! $history->hasResult()): ?>
+  <?= $this->translate('No history events found matching the filter'); ?>
+<?php endif ?>
 </div>

modules/monitoring/application/views/scripts/list/comments.phtml

@@ -12,13 +12,6 @@
 </div>
 <?php endif ?>
 <div class="content">
-<?php
-
-if (count($comments) === 0) {
-    echo $this->translate('No comments found matching the filter') . '</div>';
-    return;
-}
-?>
   <table data-base-target="_next"
          class="action comments multiselect"
          data-icinga-multiselect-url="/icingaweb2/monitoring/comments/show"
@@ -91,4 +84,7 @@ if (count($comments) === 0) {
 <?php endforeach ?>
     </tbody>
   </table>
+<?php if (! $comments->hasResult()): ?>
+  <?= $this->translate('No comments found matching the filter'); ?>
+<?php endif ?>
 </div>

modules/monitoring/application/views/scripts/list/contacts.phtml

@@ -8,14 +8,7 @@
 </div>
 <?php endif ?>
 <div data-base-target="_next" class="content contacts">
-<?php
-
-if (count($contacts) === 0) {
-    echo $this->translate('No contacts found matching the filter') . '</div>';
-    return;
-}
-?>
-<?php foreach ($contacts as $contact): ?>
+    <?php foreach ($contacts as $contact): ?>
         <div class="contact">
             <?= $this->img('/static/gravatar', array('email' => $contact->contact_email)); ?>
             <strong><?= $this->qlink(
@@ -59,4 +52,7 @@ if (count($contacts) === 0) {
     if (true): /* The following piece of HTML MUST be nested in <?php */ ?>
     <div style="clear: both;"></div>
     <?php endif; ?>
+    <?php if (! $contacts->hasResult()): ?>
+        <?= $this->translate('No contacts found matching the filter'); ?>
+    <?php endif ?>
 </div>

modules/monitoring/application/views/scripts/list/downtimes.phtml

@@ -16,14 +16,6 @@ if (! $this->compact): ?>
 </div>
 <?php endif ?>
 <div class="content">
-<?php
-
-if (count($downtimes) === 0) {
-    echo $this->translate('No downtimes found matching the filter,'
-            . ' maybe the downtime already expired.') . '</div>';
-    return;
-}
-?>
   <table data-base-target="_next"
          class="action multiselect"
          data-icinga-multiselect-url="/icingaweb2/monitoring/downtimes/show"
@@ -143,4 +135,7 @@ if (count($downtimes) === 0) {
 <?php endforeach ?>
     </tbody>
   </table>
+<?php if (! $downtimes->hasResult()): ?>
+  <?= $this->translate('No downtimes found matching the filter, maybe the downtime already expired.'); ?>
+<?php endif ?>
 </div>

modules/monitoring/application/views/scripts/list/eventgrid.phtml

@@ -15,11 +15,6 @@ if (! $this->compact): ?>
 <div class="content" data-base-target="_next">
 <?php
 
-if (count($summary) === 0) {
-    echo $this->translate('No state changes in the selected time period.') . '</div>';
-    return;
-}
-
 $settings = array(
     'cnt_up' => array(
         'tooltip' => $this->translate('%d hosts ok on %s'),
@@ -60,14 +55,6 @@ $settings = array(
     )
 );
 
-$from = intval($form->getValue('from', strtotime('3 months ago')));
-$to = intval($form->getValue('to', time()));
-
-// don't display more than ten years, or else this will get really slow
-if ($to - $from > 315360000) {
-    $from = $to - 315360000;
-}
-
 $data = array();
 foreach ($summary as $entry) {
     $day = $entry->day;
@@ -90,6 +77,19 @@ foreach ($summary as $entry) {
     );
 }
 
+if (! $summary->hasResult()) {
+    echo $this->translate('No state changes in the selected time period.') . '</div>';
+    return;
+}
+
+$from = intval($form->getValue('from', strtotime('3 months ago')));
+$to = intval($form->getValue('to', time()));
+
+// don't display more than ten years, or else this will get really slow
+if ($to - $from > 315360000) {
+    $from = $to - 315360000;
+}
+
 $f = new DateTime();
 $f->setTimestamp($from);
 $t = new DateTime();
@@ -117,11 +117,11 @@ for ($i = 0; $i < $diff->days; $i += $step) {
 }
 ?>
 <div style="width: 33.5em;">
-<? foreach (array_reverse($grids) as $key => $grid) { ?>
+<?php foreach (array_reverse($grids) as $key => $grid): ?>
     <div style=" <?= $this->orientation === 'horizontal' ? '' : 'display: inline-block; vertical-align: top; top; margin: 0.5em;' ?>">
         <?= $grid; ?>
         <?= $this->orientation === 'horizontal' ? '<br />' : '' ?>
     </div>
-<? } ?>
+<?php endforeach ?>
     </div>
 </div>

modules/monitoring/application/views/scripts/list/eventhistory.phtml

@@ -12,12 +12,6 @@ if (! $this->compact): ?>
 </div>
 <?php endif ?>
 <div class="content">
-<?php
-if (count($history) === 0) {
-    echo $this->translate('No history events found matching the filter') . '</div>';
-    return;
-}
-?>
   <table data-base-target="_next" class="action">
     <tbody>
     <?php foreach ($history as $event): ?>
@@ -96,4 +90,7 @@ if (count($history) === 0) {
     <?php endforeach ?>
     </tbody>
   </table>
+<?php if (! $history->hasResult()): ?>
+  <?= $this->translate('No history events found matching the filter'); ?>
+<?php endif ?>
 </div>

modules/monitoring/application/views/scripts/list/hostgroups.phtml

@@ -13,11 +13,10 @@ if (! $this->compact): ?>
 <div class="content">
 <?php
 
-if (count($hostgroups) === 0) {
-    echo $this->translate('No hostgroups found matching the filter') . '</div>';
-    return;
-}
-?>
+$firstRow = true;
+foreach ($hostgroups as $h): ?>
+<?php if ($firstRow): ?>
+  <?php $firstRow = false; ?>
   <table class="groupview action" data-base-target="_next">
     <thead>
       <th><?= $this->translate('Last Problem'); ?></th>
@@ -28,32 +27,35 @@ if (count($hostgroups) === 0) {
       <th><?= $this->translate('Service States'); ?></th>
     </thead>
     <tbody>
-    <?php foreach ($hostgroups as $h):
-        if ($h->hosts_down_unhandled) {
-            $handled = false;
-            $state = Host::STATE_DOWN;
-            $lastStateChange = $h->hosts_down_last_state_change_unhandled;
-        } elseif ($h->hosts_unreachable_unhandled) {
-            $handled = false;
-            $state = Host::STATE_UNREACHABLE;
-            $lastStateChange = $h->hosts_unreachable_last_state_change_unhandled;
-        } else {
-            $handled = true;
-            if ($h->hosts_down_handled) {
-                $state = Host::STATE_DOWN;
-                $lastStateChange = $h->hosts_down_last_state_change_handled;
-            } elseif ($h->hosts_unreachable_handled) {
-                $state = Host::STATE_UNREACHABLE;
-                $lastStateChange = $h->hosts_unreachable_last_state_change_handled;
-            } elseif ($h->hosts_up) {
-                $state = Host::STATE_UP;
-                $lastStateChange = $h->hosts_up_last_state_change;
-            } else {
-                $state = Host::STATE_PENDING;
-                $lastStateChange = $h->hosts_pending_last_state_change;
-            }
-        }
-    ?>
+<?php endif ?>
+<?php
+
+if ($h->hosts_down_unhandled) {
+    $handled = false;
+    $state = Host::STATE_DOWN;
+    $lastStateChange = $h->hosts_down_last_state_change_unhandled;
+} elseif ($h->hosts_unreachable_unhandled) {
+    $handled = false;
+    $state = Host::STATE_UNREACHABLE;
+    $lastStateChange = $h->hosts_unreachable_last_state_change_unhandled;
+} else {
+    $handled = true;
+    if ($h->hosts_down_handled) {
+        $state = Host::STATE_DOWN;
+        $lastStateChange = $h->hosts_down_last_state_change_handled;
+    } elseif ($h->hosts_unreachable_handled) {
+        $state = Host::STATE_UNREACHABLE;
+        $lastStateChange = $h->hosts_unreachable_last_state_change_handled;
+    } elseif ($h->hosts_up) {
+        $state = Host::STATE_UP;
+        $lastStateChange = $h->hosts_up_last_state_change;
+    } else {
+        $state = Host::STATE_PENDING;
+        $lastStateChange = $h->hosts_pending_last_state_change;
+    }
+}
+
+?>
       <tr class="state <?= Host::getStateText($state) ?><?= $handled ? ' handled' : '' ?>" href="<?=
         $this->href('monitoring/list/hosts', array('hostgroup_name' => $h->hostgroup_name))
       ?>">
@@ -461,7 +463,11 @@ if (count($hostgroups) === 0) {
         <?php endif ?>
         </td>
       </tr>
-    <?php endforeach ?>
+<?php endforeach ?>
+<?php if ($hostgroups->hasResult()): ?>
     </tbody>
   </table>
+<?php else: ?>
+  <?= $this->translate('No hostgroups found matching the filter'); ?>
+<?php endif ?>
 </div>

modules/monitoring/application/views/scripts/list/hosts.phtml

@@ -15,14 +15,6 @@ if (! $this->compact): ?>
 </div>
 <?php endif ?>
 <div class="content">
-<?php
-
-if (count($hosts) === 0) {
-    echo $this->translate('No hosts found matching the filter') . '</div>';
-    return;
-}
-?>
-
 <table
     data-base-target="_next"
     class="action multiselect"
@@ -99,4 +91,7 @@ if (count($hosts) === 0) {
   <?php endforeach ?>
   </tbody>
 </table>
+<?php if (! $hosts->hasResult()): ?>
+  <?= $this->translate('No hosts found matching the filter'); ?>
+<?php endif ?>
 </div>

modules/monitoring/application/views/scripts/list/notifications.phtml

@@ -12,13 +12,6 @@ if (! $this->compact): ?>
 </div>
 <?php endif ?>
 <div class="content">
-<?php
-
-if (count($notifications) === 0) {
-    echo $this->translate('No notifications found matching the filter') . '</div>';
-    return;
-}
-?>
     <table data-base-target="_next" class="action">
     <tbody>
     <?php foreach ($notifications as $notification):
@@ -71,4 +64,7 @@ if (count($notifications) === 0) {
     <?php endforeach ?>
     </tbody>
     </table>
+<?php if (! $notifications->hasResult()): ?>
+  <?= $this->translate('No notifications found matching the filter'); ?>
+<?php endif ?>
 </div>

modules/monitoring/application/views/scripts/list/servicegroups.phtml

@@ -10,11 +10,10 @@
 <div class="content">
 <?php
 
-if (count($servicegroups) === 0) {
-    echo $this->translate('No servicegroups found matching the filter') . '</div>';
-    return;
-}
-?>
+$firstRow = true;
+foreach ($servicegroups as $s): ?>
+<?php if ($firstRow): ?>
+  <?php $firstRow = false; ?>
   <table class="groupview action" data-base-target="_next">
     <thead>
       <th><?= $this->translate('Last Problem'); ?></th>
@@ -23,7 +22,7 @@ if (count($servicegroups) === 0) {
       <th><?= $this->translate('Service States'); ?></th>
     </thead>
     <tbody>
-    <?php foreach ($servicegroups as $s): ?>
+<?php endif ?>
       <tr href="<?= $this->href('monitoring/list/services', array('servicegroup_name' => $s->servicegroup_name)); ?>">
        <?php if ($s->services_critical_last_state_change_unhandled): ?>
         <td class="state change critical unhandled">
@@ -298,7 +297,11 @@ if (count($servicegroups) === 0) {
         <?php endif ?>
         </td>
       </tr>
-    <?php endforeach ?>
+<?php endforeach ?>
+<?php if ($servicegroups->hasResult()): ?>
     </tbody>
   </table>
+<?php else: ?>
+  <?= $this->translate('No servicegroups found matching the filter'); ?>
+<?php endif ?>
 </div>

modules/monitoring/application/views/scripts/list/services.phtml

@@ -18,13 +18,6 @@ if (! $this->compact): ?>
 </div>
 <?php endif ?>
 <div class="content">
-<?php
-
-if (count($services) === 0) {
-    echo $this->translate('No services found matching the filter') . '</div>';
-    return;
-}
-?>
 <table data-base-target="<?= isset($baseTarget) ? $baseTarget : '_next'; ?>"
     class="action multiselect <?php if ($this->compact): ?> compact<?php endif ?>" style="table-layout: auto;"
     data-icinga-multiselect-url="<?= $this->href("monitoring/services/show") ?>"
@@ -91,4 +84,7 @@ if (count($services) === 0) {
 <?php endforeach ?>
   </tbody>
 </table>
+<?php if (! $services->hasResult()): ?>
+  <?= $this->translate('No services found matching the filter'); ?>
+<?php endif ?>
 </div>

modules/monitoring/application/views/scripts/service/history.phtml

@@ -1,6 +1,19 @@
 <?php
 use Icinga\Module\Monitoring\Object\Service;
 
+function contactsLink($match, $view) {
+    $links = array();
+    foreach (preg_split('/,\s/', $match[1]) as $contact) {
+        $links[] = $view->qlink(
+            $contact,
+            'monitoring/show/contact',
+            array('contact_name' => $contact),
+            array('title' => sprintf($view->translate('Show detailed information about %s'), $contact))
+        );
+    }
+    return '[' . implode(', ', $links) . ']';
+}
+
 $self = $this;
 
 if (! $this->compact): ?>
@@ -15,29 +28,6 @@ if (! $this->compact): ?>
 </div>
 <?php endif ?>
 <div class="content">
-<?php
-
-if (count($history) === 0) {
-    echo $this->translate('No history events found matching the filter') . '</div>';
-    return;
-}
-?>
-
-<?php
-function contactsLink($match, $view) {
-    $links = array();
-    foreach (preg_split('/,\s/', $match[1]) as $contact) {
-        $links[] = $view->qlink(
-            $contact,
-            'monitoring/show/contact',
-            array('contact_name' => $contact),
-            array('title' => sprintf($view->translate('Show detailed information about %s'), $contact))
-        );
-    }
-    return '[' . implode(', ', $links) . ']';
-}
-?>
-
   <table data-base-target="_next" class="action objecthistory">
     <tbody>
     <?php foreach ($history as $event): ?>
@@ -126,7 +116,10 @@ function contactsLink($match, $view) {
           </div>
         </td>
       </tr>
-<?php endforeach; ?>
+    <?php endforeach; ?>
     </tbody>
   </table>
+<?php if (! $history->hasResult()): ?>
+  <?= $this->translate('No history events found matching the filter'); ?>
+<?php endif ?>
 </div>

modules/monitoring/library/Monitoring/DataView/DataView.php

@@ -433,6 +433,16 @@ abstract class DataView implements QueryInterface, SortRules, IteratorAggregate
         return $this->query->hasMore();
     }
 
+    /**
+     * Return whether this query will or has yielded any result
+     *
+     * @return  bool
+     */
+    public function hasResult()
+    {
+        return $this->query->hasResult();
+    }
+
     /**
      * Set a limit count and offset
      *