hotline #79510 fix errors

library/Class/Calendar.php

@@ -153,20 +153,14 @@ class Class_Calendar {
 
 
   protected function _loadArticles($extra_prefs) {
-    $id_cat = ('all' == $this->select_id_cat)
-      ? $this->id_categorie
-      : $this->select_id_cat;
-
-    $time = $this->getTimeSource()->time();
-
     $prefs = array_merge(['display_order' => 'EventDebut',
-                          'id_categorie' => $id_cat,
+                          'id_categorie' => $this->_getCategoriesIds(),
                           'events_only' => true,
                           'event_date' => $this->date,
                           'id_bib' => $this->id_bib,
                           'id_lieu' => $this->getPlaceParam(),
                           'custom_fields' => $this->getCustomFields(),
-                          'published' => $this->date >= strftime('%Y-%m',$time)],
+                          'published' => $this->date >= strftime('%Y-%m', $this->getTimeSource()->time())],
                          $extra_prefs);
 
     $articles = Class_Article::getArticlesByPreferences($prefs);
@@ -175,6 +169,22 @@ class Class_Calendar {
   }
 
 
+  protected function _getCategoriesIds() {
+    $ids = ('all' == $this->select_id_cat)
+      ? $this->id_categorie
+      : $this->select_id_cat;
+
+    return $this->_areCategoriesIdsValid($ids)
+      ? $ids
+      : '';
+  }
+
+
+  protected function _areCategoriesIdsValid($ids) {
+    return preg_match('/^\d-?/', $ids);
+  }
+
+
   protected function getPlaceParam() {
     return isset($this->place) ? $this->place : '';
   }