<?php

function buildFieldsString($requestFields) {
  $fields = [];
  foreach ($requestFields as $field) {
    if (isset($field['subfields'])) {
      $subfields = [];
      foreach ($field['subfields'] as $subfield) {
        if (isset($subfield['subfields'])) {
          $subsubfields = [];
          foreach ($subfield['subfields'] as $subsubfield) {
            $subsubfields[] = $subsubfield['name'];
          }
          $subfields[] = $subfield['name'] . '{' . implode(',', $subsubfields) . '}';
        } else {
          $subfields[] = $subfield['name'];
        }
      }
      $fields[] = $field['name'] . '{' . implode(',', $subfields) . '}';
    } else {
      $fields[] = $field['name'];
    }
  }
  return '&fields=' . implode(',', $fields);
}

function buildParamsString($requestParams) {
  $queryString = [];
  foreach ($requestParams as $param) {
      $queryString[] = urlencode($param['name']) . '=' . urlencode($param['value']);
  }
  return implode('&', $queryString);
}

function getEventsByMonth($month) {
  $events = page('programme')->children();
}