fix: SA: Fix "might not be defined" rule.

SA stands for Static Analysis.

src/Bundle/ChillActivityBundle/Export/Export/StatActivityDuration.php

@@ -1,21 +1,6 @@
 <?php
 
-/*
- * Copyright (C) 2015 Champs-Libres <info@champs-libres.coop>
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
+declare(strict_types=1);
 
 namespace Chill\ActivityBundle\Export\Export;
 
@@ -28,62 +13,47 @@ use Doctrine\ORM\EntityManagerInterface;
 
 /**
  * This export allow to compute stats on activity duration.
- * 
+ *
  * The desired stat must be given in constructor.
- *
- *
- * @author Julien Fastré <julien.fastre@champs-libres.coop>
  */
 class StatActivityDuration implements ExportInterface
 {
-    /**
-     *
-     * @var EntityManagerInterface
-     */
-    protected $entityManager;
-    
-    const SUM = 'sum';
-    
+    protected EntityManagerInterface $entityManager;
+
+    public const SUM = 'sum';
+
     /**
      * The action for this report.
-     *
-     * @var string
      */
-    protected $action;
-    
+    protected string $action;
+
     /**
-     * constructor
-     * 
-     * @param EntityManagerInterface $em
      * @param string $action the stat to perform
      */
-    public function __construct(
-            EntityManagerInterface $em,
-            $action = 'sum'
-            )
+    public function __construct(EntityManagerInterface $em, string $action = 'sum')
     {
         $this->entityManager = $em;
         $this->action = $action;
     }
-    
+
     public function buildForm(\Symfony\Component\Form\FormBuilderInterface $builder)
     {
-        
+
     }
 
     public function getDescription()
     {
         if ($this->action === self::SUM) {
-            return "Sum activities duration by various parameters.";
+            return 'Sum activities duration by various parameters.';
         }
     }
 
     public function getTitle()
     {
         if ($this->action === self::SUM) {
-            return "Sum activity duration";
+            return 'Sum activity duration';
         }
-        
+
     }
 
     public function getType()
@@ -91,31 +61,34 @@ class StatActivityDuration implements ExportInterface
         return 'activity';
     }
 
-    public function initiateQuery(array $requiredModifiers,  array $acl, array $data = array())
+    public function initiateQuery(array $requiredModifiers,  array $acl, array $data = [])
     {
-        $centers = array_map(function($el) { return $el['center']; }, $acl);
+        $centers = array_map(
+            static fn(array $el): string => $el['center'],
+            $acl
+        );
+
         $qb = $this->entityManager->createQueryBuilder();
-        
+
+        $select = null;
+
         if ($this->action === self::SUM) {
-            $select = "SUM(activity.durationTime) AS export_stat_activity";
+            $select = 'SUM(activity.durationTime) AS export_stat_activity';
         }
-        
-        $qb->select($select)
-                ->from('ChillActivityBundle:Activity', 'activity')
-                ->join('activity.person',  'person')
-                ->join('person.center', 'center')
-                ->where($qb->expr()->in('center', ':centers'))
-                ->setParameter(':centers', $centers)
-                ;
-        
-        return $qb;
+
+        return $qb->select($select)
+            ->from('ChillActivityBundle:Activity', 'activity')
+            ->join('activity.person',  'person')
+            ->join('person.center', 'center')
+            ->where($qb->expr()->in('center', ':centers'))
+            ->setParameter(':centers', $centers);
     }
-    
+
     public function supportsModifiers()
     {
-        return array('person', 'activity');
+        return ['person', 'activity'];
     }
-    
+
     public function requiredRole()
     {
         return new Role(ActivityStatsVoter::STATS);
@@ -129,26 +102,17 @@ class StatActivityDuration implements ExportInterface
     public function getLabels($key, array $values, $data)
     {
         if ($key !== 'export_stat_activity') {
-            throw new \LogicException("the key $key is not used by this export");
+            throw new \LogicException(sprintf('The key %s is not used by this export', $key));
         }
-        
-        switch ($this->action) {
-            case self::SUM:
-                $header = "Sum of activities  duration";
-        }
-        
-        return function($value) use ($header) {
-            return $value === '_header' ? 
-                    $header
-                    :
-                    $value
-                    ;
-        };
+
+        $header = $this->action === self::SUM ? 'Sum of activities duration' : false;
+
+        return static fn(string $value) => $value === '_header' ?  $header : $value;
     }
 
     public function getQueryKeys($data)
     {
-        return array('export_stat_activity');
+        return ['export_stat_activity'];
     }
 
     public function getResult($qb, $data)