<?php

/**
 * @file
 * Stub file for bootstrap_pager().
 */

/* @noinspection PhpDocMissingThrowsInspection */

/**
 * Returns HTML for a query pager.
 *
 * Menu callbacks that display paged query results should call theme('pager') to
 * retrieve a pager control so that users can view other results. Format a list
 * of nearby pages with additional query results.
 *
 * @param array $variables
 *   An associative array containing:
 *   - tags: An array of labels for the controls in the pager.
 *   - element: An optional integer to distinguish between multiple pagers on
 *     one page.
 *   - parameters: An associative array of query string parameters to append to
 *     the pager links.
 *   - quantity: The number of pages in the list.
 *
 * @return string
 *   The constructed HTML.
 *
 * @see theme_pager()
 *
 * @ingroup theme_functions
 */
function bootstrap_pager(array $variables) {
  $output = "";
  $items = array();
  $tags = $variables['tags'];
  $element = $variables['element'];
  $parameters = $variables['parameters'];
  $quantity = $variables['quantity'];

  $quantity = empty($variables['quantity']) ? 0 : $variables['quantity'];
  global $pager_page_array, $pager_total;

  // Nothing to do if there is no pager.
  if (!isset($pager_page_array[$element]) || !isset($pager_total[$element])) {
    return;
  }

  // Nothing to do if there is only one page.
  if ($pager_total[$element] <= 1) {
    return;
  }

  // Calculate various markers within this pager piece:
  // Middle is used to "center" pages around the current page.
  $pager_middle = ceil($quantity / 2);
  // Current is the page we are currently paged to.
  $pager_current = $pager_page_array[$element] + 1;
  // First is the first page listed by this pager piece (re quantity).
  $pager_first = $pager_current - $pager_middle + 1;
  // Last is the last page listed by this pager piece (re quantity).
  $pager_last = $pager_current + $quantity - $pager_middle;
  // Max is the maximum page number.
  $pager_max = $pager_total[$element];

  // Prepare for generation loop.
  $i = $pager_first;
  if ($pager_last > $pager_max) {
    // Adjust "center" if at end of query.
    $i = $i + ($pager_max - $pager_last);
    $pager_last = $pager_max;
  }
  if ($i <= 0) {
    // Adjust "center" if at start of query.
    $pager_last = $pager_last + (1 - $i);
    $i = 1;
  }

  // End of generation loop preparation.
  /* @noinspection PhpUnhandledExceptionInspection */
  $li_first = theme('pager_first', array(
    'text' => (isset($tags[0]) ? $tags[0] : t('first')),
    'element' => $element,
    'parameters' => $parameters,
  ));
  /* @noinspection PhpUnhandledExceptionInspection */
  $li_previous = theme('pager_previous', array(
    'text' => (isset($tags[1]) ? $tags[1] : t('previous')),
    'element' => $element,
    'interval' => 1,
    'parameters' => $parameters,
  ));
  /* @noinspection PhpUnhandledExceptionInspection */
  $li_next = theme('pager_next', array(
    'text' => (isset($tags[3]) ? $tags[3] : t('next')),
    'element' => $element,
    'interval' => 1,
    'parameters' => $parameters,
  ));
  /* @noinspection PhpUnhandledExceptionInspection */
  $li_last = theme('pager_last', array(
    'text' => (isset($tags[4]) ? $tags[4] : t('last')),
    'element' => $element,
    'parameters' => $parameters,
  ));
  if ($pager_total[$element] > 1) {

    // Only show "first" link if set on components' theme setting.
    if ($li_first && bootstrap_setting('pager_first_and_last')) {
      $items[] = array(
        'class' => array('pager-first'),
        'data' => $li_first,
      );
    }
    if ($li_previous) {
      $items[] = array(
        'class' => array('prev'),
        'data' => $li_previous,
      );
    }
    // When there is more than one page, create the pager list.
    if ($i != $pager_max) {
      if ($i > 1) {
        $items[] = array(
          'class' => array('pager-ellipsis', 'disabled'),
          'data' => '<span>…</span>',
        );
      }
      // Now generate the actual pager piece.
      for (; $i <= $pager_last && $i <= $pager_max; $i++) {
        if ($i < $pager_current) {
          /* @noinspection PhpUnhandledExceptionInspection */
          $items[] = array(
            // 'class' => array('pager-item'),.
            'data' => theme('pager_previous', array(
              'text' => $i,
              'element' => $element,
              'interval' => ($pager_current - $i),
              'parameters' => $parameters,
            )),
          );
        }
        if ($i == $pager_current) {
          $items[] = array(
            // Add the active class.
            'class' => array('active'),
            'data' => "<span>$i</span>",
          );
        }
        if ($i > $pager_current) {
          /* @noinspection PhpUnhandledExceptionInspection */
          $items[] = array(
            'data' => theme('pager_next', array(
              'text' => $i,
              'element' => $element,
              'interval' => ($i - $pager_current),
              'parameters' => $parameters,
            )),
          );
        }
      }
      if ($i < $pager_max) {
        $items[] = array(
          'class' => array('pager-ellipsis', 'disabled'),
          'data' => '<span>…</span>',
        );
      }
    }
    // End generation.
    if ($li_next) {
      $items[] = array(
        'class' => array('next'),
        'data' => $li_next,
      );
    }
    // // Only show "last" link if set on components' theme setting.
    if ($li_last && bootstrap_setting('pager_first_and_last')) {
      $items[] = array(
        'class' => array('pager-last'),
        'data' => $li_last,
      );
    }

    $build = array(
      '#theme_wrappers' => array('container__pager'),
      '#attributes' => array(
        'class' => array(
          'text-center',
        ),
      ),
      'pager' => array(
        '#theme' => 'item_list',
        '#items' => $items,
        '#attributes' => array(
          'class' => array('pagination'),
        ),
      ),
    );
    return drupal_render($build);
  }
  return $output;
}
