<?php
/**
 * @file views_flipped_table.module
 * Flipped table style plugin, flipping rows and columns.
 */

/**
 * Implementation of hook_views_api().
 */
function views_flipped_table_views_api() {
  return array(
    'api' => 3.0,
  );
}

/**
 * Make sure the $header variable is passed to the theme file.
 */
function template_preprocess_views_flipped_table(&$vars) {
  // Let the base table preprocessor act first.
  template_preprocess_views_view_table($vars);

  // If views_fieldsets is enabled run its preprocess function
  if (module_exists('views_fieldsets')) {
    views_fieldsets_preprocess_views_view_table($vars);
  }

  // Get wrapper fields for table rows (this is inconsistent with standard views
  // table, which ignores the rows. See https://drupal.org/node/1122130
  $view     = $vars['view'];
  $fields   = &$view->field;
  $view     = $vars['view'];
  $handler  = $view->style_plugin;
  $options  = $view->style_plugin->options;
  $columns  = $handler->sanitize_columns($options['columns'], $fields);
  foreach ($columns as $field => $column) {
    $vars['wrapper_classes'][$field] = array();
    // Set up the wrapper label class.
    if ($fields[$field]->options['element_default_classes']) {
      $vars['wrapper_classes'][$field][] = "views-field views-field-" . $vars['fields'][$field];
    }
    $class = $fields[$field]->element_wrapper_classes(0);
    if ($class) {
      $vars['wrapper_classes'][$field][] = $class;
    }
  }

  // Flip the table.
  $vars['rows_flipped'] = array();
  foreach ($vars['rows'] as $key => $col) {
    foreach ($col as $ltr => $value) {
      $vars['rows_flipped'][$ltr][$key] = $value;
    }
  }

  // Remove rows if the option hide empty column is checked and the field is empty.
  foreach ($vars['rows_flipped'] as $ltr => $columns) {
    if (!empty($options['info'][$ltr]['empty_column'])) {
      $empty = TRUE;
      foreach ($columns as $column) {
        $empty &= empty($column);
      }
      if ($empty) {
        unset($vars['rows_flipped'][$ltr]);
        unset($vars['header'][$ltr]);
      }
    }
  }

  // Determine if the first row is to be shown as a table header.
  $vars['first_row_header'] = (boolean) $vars['view']->style_plugin->options['flipped_table_header_first_field'];

  $default_row_class = isset($options['default_row_class']) ? $options['default_row_class'] : FALSE;
  $row_class_special = isset($options['row_class_special']) ? $options['row_class_special'] : FALSE;
  // Set up striping values.
  $count = 0;
  $max = count($vars['rows_flipped']);
  foreach ($vars['rows_flipped'] as $field_name => $row) {
    $count++;
    if ($default_row_class) {
      $vars['wrapper_classes'][$field_name][] = 'views-row';
      $vars['wrapper_classes'][$field_name][] = 'views-row-' . $count;
    }
    if ($row_class_special) {
      $vars['wrapper_classes'][$field_name][] = 'views-row-' . ($count % 2 ? 'odd' : 'even');
      if ($count == 1) {
        $vars['wrapper_classes'][$field_name][] = 'views-row-first';
      }
      if ($count == $max) {
        $vars['wrapper_classes'][$field_name][] = 'views-row-last';
      }
    }

    if ($row_class = $view->style_plugin->get_row_class($field_name)) {
      $vars['wrapper_classes'][$field_name][] = $row_class;
    }

    // Flatten the classes to a string for each row for the template file.
    $vars['wrapper_classes'][$field_name] = isset($vars['wrapper_classes'][$field_name]) ? implode(' ', $vars['wrapper_classes'][$field_name]) : '';
  }

  // Set up field striping values
  $column_class_special = isset($options['column_class_special']) ? $options['column_class_special'] : FALSE;

  if ($column_class_special) {
    foreach ($vars['field_classes'] as $field_name => $field_column) {
      $count = 0;
      $max = count($field_column);
      foreach ($field_column as $index => $column) {
        $count++;
        $vars['field_classes'][$field_name][$index] .= ' views-column-' . ($count % 2 ? 'odd' : 'even');
        if ($count == 1) {
          $vars['field_classes'][$field_name][$index] .= ' views-column-first';
        }
        if ($count == $max) {
          $vars['field_classes'][$field_name][$index] .= ' views-column-last';
        }
      }
    }
  }

}