Feature: exports for aside activities

src/Bundle/ChillMainBundle/Export/ExportInterface.php

@@ -83,9 +83,9 @@ interface ExportInterface extends ExportElementInterface
      *
      * @param string $key The column key, as added in the query
      * @param mixed[] $values The values from the result. if there are duplicates, those might be given twice. Example: array('FR', 'BE', 'CZ', 'FR', 'BE', 'FR')
-     * @param mixed $data The data from the export's form (as defined in `buildForm`
+     * @param mixed $data The data from the export's form (as defined in `buildForm`)
      *
-     * @return Closure where the first argument is the value, and the function should return the label to show in the formatted file. Example : `function($countryCode) use ($countries) { return $countries[$countryCode]->getName(); }`
+     * @return pure-callable(null|string|int|float|'_header' $value):string|int|\DateTimeInterface where the first argument is the value, and the function should return the label to show in the formatted file. Example : `function($countryCode) use ($countries) { return $countries[$countryCode]->getName(); }`
      */
     public function getLabels($key, array $values, $data);
 

src/Bundle/ChillMainBundle/Export/Helper/DateTimeHelper.php

@@ -35,6 +35,10 @@ class DateTimeHelper
                 return '';
             }
 
+            if ($value instanceof \DateTimeInterface) {
+                return $value;
+            }
+
             // warning: won't work with DateTimeImmutable as we reset time a few lines later
             $date = DateTime::createFromFormat('Y-m-d', $value);
             $hasTime = false;