Json::entries_grid PHP Method

  protected function entries_grid($entry_id, $field, $field_data)
  {
    if ( ! isset($this->entries_grid_rows[$field['field_id']]))
    {
      $query = ee()->db->where_in('entry_id', $this->entries_entry_ids)
                       ->order_by('row_order')
                       ->get('channel_grid_field_'.$field['field_id']);

      foreach ($query->result_array() as $row)
      {
        if ( ! isset($this->entries_grid_rows[$field['field_id']][$row['entry_id']]))
        {
          $this->entries_grid_rows[$field['field_id']][$row['entry_id']] = array();
        }

        $this->entries_grid_rows[$field['field_id']][$row['entry_id']][] = $row;
      }

      $query->free_result();
    }

    if (is_null($this->entries_grid_cols))
    {
      $query = ee()->db->order_by('col_order', 'ASC')
                       ->get('grid_columns');

      foreach ($query->result_array() as $row)
      {
        if ( ! isset($this->entries_grid_cols[$row['field_id']]))
        {
          $this->entries_grid_cols[$row['field_id']] = array();
        }

        $this->entries_grid_cols[$row['field_id']][$row['col_id']] = $row;
      }

      $query->free_result();
    }

    $data = array();

    if (isset($this->entries_grid_rows[$field['field_id']][$entry_id]) && isset($this->entries_grid_cols[$field['field_id']]))
    {
      foreach ($this->entries_grid_rows[$field['field_id']][$entry_id] as $grid_row)
      {
        $row = array('row_id' => (int) $grid_row['row_id']);

        foreach ($this->entries_grid_cols[$field['field_id']] as $col_id => $col)
        {
          $row[$col['col_name']] = $grid_row['col_id_'.$col_id];
        }

        $data[] = $row;
      }
    }

    return $data;
  }