<?php
/**
 * @file
 * Node-related functions.
 */

/**
 * Implements hook_preprocess_node__BUNDLE().
 */
function cdesai_emulsify_preprocess_node__event(&$variables) {
  // final date to be used - if no end_date available, then use start_date
  $date_to_use = NULL;
  $content = $variables['content'];
  $view_mode = $variables['view_mode'];

  // check to see if a date has been entered at all
  if (isset($content['field_daterange'][0])) {

    if (isset($start_date)) {
      // set date to use as start date, but if end date is available use that instead.
      $date_to_use = $start_date;
      if (!empty($end_date)) {
        $date_to_use = $end_date;
      }

      // convert date_to_use string to date object
      $dateToUseObj = DateTime::createFromFormat("l, F j, Y - h:ia", $date_to_use);
      if ($dateToUseObj) {
        // convert date object to timestamp
        $date_timestamp = $dateToUseObj->getTimestamp();
        // convert current time to timestamp
        $current_timestamp = strtotime("now");
        // returns TRUE if past event, FALSE otherwise
        $variables['event_is_past'] = $current_timestamp > $date_timestamp ?: FALSE;

        // break up the start and end dates
        $startDateObj = DateTime::createFromFormat("l, F j, Y - h:ia", $start_date);
        $event_start_date = $startDateObj->format($dateFormat);
        $event_start_time = $startDateObj->format('g:ia');

        if (!empty($end_date)) {
          $endDateObj = DateTime::createFromFormat("l, F j, Y - h:ia", $end_date);
          $event_end_date = $endDateObj->format($dateFormat . ', Y');
          $event_end_time = $endDateObj->format('g:ia');

          // default to display both the start and end dates
          $variables['event_date'] = $event_start_date . ' - ' . $event_end_date;
          // if the start date and end date are equal, display only the end date
          if ($startDateObj->format($dateFormat . ', Y') == $event_end_date) {
            $variables['event_date'] = $event_end_date;
          }
          // append the start and end times.
          $variables['event_time'] = $event_start_time . ' - ' . $event_end_time;
          // If the start and end time are the same, display "All Day" instead.
          if ($event_start_time == $event_end_time && $event_start_date == $event_end_date) {
            $variables['event_time'] = t('All Day');
          }
        } else {
          // If no end date, show only the start date and the text "All Day".
          $variables['event_date'] = $event_start_date;
          $variables['event_time'] = t('All Day');
        }
      }
    }
  }

}