fix: List of travel entries in travel reimbursement PDF is not sorted on date.

pub/api/classes/API.php

@@ -751,12 +751,38 @@ class API
                 $values[] = $from;
                 $values[] = $to;
             }
+
+            // ORDER BY
+            if (isset($builder['orderBy']) && is_array($builder['orderBy'])) {
+
+                if (count($builder['orderBy']) !== 2) {
+                    continue;
+                }
+
+                $column = $builder['orderBy'][0];
+                $direction = strtoupper($builder['orderBy'][1]);
+
+                if (!in_array($column, $this->allowedGetColumns, true)) {
+                    $this->apiOutput(400, ['error' => "The column $column is not allowed."]);
+                }
+
+                if (!in_array($direction, ['ASC', 'DESC'], true)) {
+                    $this->apiOutput(400, ['error' => "Invalid order direction."]);
+                }
+
+                $orderByClauses[] = "$column $direction";
+            }
+
         }
 
         if (!empty($whereClauses)) {
             $this->baseQuery .= " WHERE " . implode(" AND ", $whereClauses);
         }
 
+        if (!empty($orderByClauses)) {
+            $this->baseQuery .= " ORDER BY " . implode(", ", $orderByClauses);
+        }
+
         return [$this->baseQuery, $types, $values];
     }