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   1  <?php
   2  /**
   3  *
   4  * This file is part of the phpBB Forum Software package.
   5  *
   6  * @copyright (c) phpBB Limited <https://www.phpbb.com>
   7  * @license GNU General Public License, version 2 (GPL-2.0)
   8  *
   9  * For full copyright and license information, please see
  10  * the docs/CREDITS.txt file.
  11  *
  12  */
  13  
  14  namespace phpbb\db\migration\data\v310;
  15  
  16  class timezone extends \phpbb\db\migration\migration
  17  {
  18  	public function effectively_installed()
  19      {
  20          return !$this->db_tools->sql_column_exists($this->table_prefix . 'users', 'user_dst');
  21      }
  22  
  23  	static public function depends_on()
  24      {
  25          return array('\phpbb\db\migration\data\v30x\release_3_0_11');
  26      }
  27  
  28  	public function update_schema()
  29      {
  30          return array(
  31              'change_columns'    => array(
  32                  $this->table_prefix . 'users'            => array(
  33                      'user_timezone'        => array('VCHAR:100', ''),
  34                  ),
  35              ),
  36          );
  37      }
  38  
  39  	public function update_data()
  40      {
  41          return array(
  42              array('custom', array(array($this, 'update_timezones'))),
  43          );
  44      }
  45  
  46  	public function update_timezones($start)
  47      {
  48          $start = (int) $start;
  49          $limit = 500;
  50          $converted = 0;
  51  
  52          $update_blocks = array();
  53  
  54          $sql = 'SELECT user_id, user_timezone, user_dst
  55              FROM ' . $this->table_prefix . 'users
  56              ORDER BY user_id ASC';
  57          $result = $this->db->sql_query_limit($sql, $limit, $start);
  58          while ($row = $this->db->sql_fetchrow($result))
  59          {
  60              $converted++;
  61  
  62              // In case this is somehow run twice on a row.
  63              // Otherwise it would just end up as UTC on the second run
  64              if (is_numeric($row['user_timezone']))
  65              {
  66                  $update_blocks[$row['user_timezone'] . ':' . $row['user_dst']][] = (int) $row['user_id'];
  67              }
  68          }
  69          $this->db->sql_freeresult($result);
  70  
  71          // Update blocks of users who share the same timezone/dst
  72          foreach ($update_blocks as $timezone => $user_ids)
  73          {
  74              $timezone = explode(':', $timezone);
  75              $converted_timezone = $this->convert_phpbb30_timezone($timezone[0], $timezone[1]);
  76  
  77              $sql = 'UPDATE ' . $this->table_prefix . "users
  78                  SET user_timezone = '" . $this->db->sql_escape($converted_timezone) . "'
  79                  WHERE " . $this->db->sql_in_set('user_id', $user_ids);
  80              $this->sql_query($sql);
  81          }
  82  
  83          if ($converted == $limit)
  84          {
  85              // There are still more to convert
  86              return $start + $limit;
  87          }
  88  
  89          // Update board default timezone
  90          $sql = 'UPDATE ' . $this->table_prefix . "config
  91              SET config_value = '" . $this->convert_phpbb30_timezone($this->config['board_timezone'], $this->config['board_dst']) . "'
  92              WHERE config_name = 'board_timezone'";
  93          $this->sql_query($sql);
  94      }
  95  
  96      /**
  97      * Determine the new timezone for a given phpBB 3.0 timezone and
  98      * "Daylight Saving Time" option
  99      *
 100      *    @param    $timezone    float    Users timezone in 3.0
 101      *    @param    $dst        int        Users daylight saving time
 102      *    @return        string        Users new php Timezone which is used since 3.1
 103      */
 104  	public function convert_phpbb30_timezone($timezone, $dst)
 105      {
 106          $offset = $timezone + $dst;
 107  
 108          switch ($timezone)
 109          {
 110              case '-12':
 111                  return 'Etc/GMT+' . abs($offset);    //'[UTC - 12] Baker Island Time'
 112              case '-11':
 113                  return 'Etc/GMT+' . abs($offset);    //'[UTC - 11] Niue Time, Samoa Standard Time'
 114              case '-10':
 115                  return 'Etc/GMT+' . abs($offset);    //'[UTC - 10] Hawaii-Aleutian Standard Time, Cook Island Time'
 116              case '-9.5':
 117                  return 'Pacific/Marquesas';            //'[UTC - 9:30] Marquesas Islands Time'
 118              case '-9':
 119                  return 'Etc/GMT+' . abs($offset);    //'[UTC - 9] Alaska Standard Time, Gambier Island Time'
 120              case '-8':
 121                  return 'Etc/GMT+' . abs($offset);    //'[UTC - 8] Pacific Standard Time'
 122              case '-7':
 123                  return 'Etc/GMT+' . abs($offset);    //'[UTC - 7] Mountain Standard Time'
 124              case '-6':
 125                  return 'Etc/GMT+' . abs($offset);    //'[UTC - 6] Central Standard Time'
 126              case '-5':
 127                  return 'Etc/GMT+' . abs($offset);    //'[UTC - 5] Eastern Standard Time'
 128              case '-4.5':
 129                  return 'America/Caracas';            //'[UTC - 4:30] Venezuelan Standard Time'
 130              case '-4':
 131                  return 'Etc/GMT+' . abs($offset);    //'[UTC - 4] Atlantic Standard Time'
 132              case '-3.5':
 133                  return 'America/St_Johns';            //'[UTC - 3:30] Newfoundland Standard Time'
 134              case '-3':
 135                  return 'Etc/GMT+' . abs($offset);    //'[UTC - 3] Amazon Standard Time, Central Greenland Time'
 136              case '-2':
 137                  return 'Etc/GMT+' . abs($offset);    //'[UTC - 2] Fernando de Noronha Time, South Georgia &amp; the South Sandwich Islands Time'
 138              case '-1':
 139                  return 'Etc/GMT+' . abs($offset);    //'[UTC - 1] Azores Standard Time, Cape Verde Time, Eastern Greenland Time'
 140              case '0':
 141                  return (!$dst) ? 'UTC' : 'Etc/GMT-1';    //'[UTC] Western European Time, Greenwich Mean Time'
 142              case '1':
 143                  return 'Etc/GMT-' . $offset;        //'[UTC + 1] Central European Time, West African Time'
 144              case '2':
 145                  return 'Etc/GMT-' . $offset;        //'[UTC + 2] Eastern European Time, Central African Time'
 146              case '3':
 147                  return 'Etc/GMT-' . $offset;        //'[UTC + 3] Moscow Standard Time, Eastern African Time'
 148              case '3.5':
 149                  return 'Asia/Tehran';                //'[UTC + 3:30] Iran Standard Time'
 150              case '4':
 151                  return 'Etc/GMT-' . $offset;        //'[UTC + 4] Gulf Standard Time, Samara Standard Time'
 152              case '4.5':
 153                  return 'Asia/Kabul';                //'[UTC + 4:30] Afghanistan Time'
 154              case '5':
 155                  return 'Etc/GMT-' . $offset;        //'[UTC + 5] Pakistan Standard Time, Yekaterinburg Standard Time'
 156              case '5.5':
 157                  return 'Asia/Kolkata';                //'[UTC + 5:30] Indian Standard Time, Sri Lanka Time'
 158              case '5.75':
 159                  return 'Asia/Kathmandu';            //'[UTC + 5:45] Nepal Time'
 160              case '6':
 161                  return 'Etc/GMT-' . $offset;        //'[UTC + 6] Bangladesh Time, Bhutan Time, Novosibirsk Standard Time'
 162              case '6.5':
 163                  return 'Indian/Cocos';                //'[UTC + 6:30] Cocos Islands Time, Myanmar Time'
 164              case '7':
 165                  return 'Etc/GMT-' . $offset;        //'[UTC + 7] Indochina Time, Krasnoyarsk Standard Time'
 166              case '8':
 167                  return 'Etc/GMT-' . $offset;        //'[UTC + 8] Chinese Standard Time, Australian Western Standard Time, Irkutsk Standard Time'
 168              case '8.75':
 169                  return 'Australia/Eucla';            //'[UTC + 8:45] Southeastern Western Australia Standard Time'
 170              case '9':
 171                  return 'Etc/GMT-' . $offset;        //'[UTC + 9] Japan Standard Time, Korea Standard Time, Chita Standard Time'
 172              case '9.5':
 173                  return 'Australia/ACT';                //'[UTC + 9:30] Australian Central Standard Time'
 174              case '10':
 175                  return 'Etc/GMT-' . $offset;        //'[UTC + 10] Australian Eastern Standard Time, Vladivostok Standard Time'
 176              case '10.5':
 177                  return 'Australia/Lord_Howe';        //'[UTC + 10:30] Lord Howe Standard Time'
 178              case '11':
 179                  return 'Etc/GMT-' . $offset;        //'[UTC + 11] Solomon Island Time, Magadan Standard Time'
 180              case '11.5':
 181                  return 'Pacific/Norfolk';            //'[UTC + 11:30] Norfolk Island Time'
 182              case '12':
 183                  return 'Etc/GMT-12';                //'[UTC + 12] New Zealand Time, Fiji Time, Kamchatka Standard Time'
 184              case '12.75':
 185                  return 'Pacific/Chatham';            //'[UTC + 12:45] Chatham Islands Time'
 186              case '13':
 187                  return 'Pacific/Tongatapu';            //'[UTC + 13] Tonga Time, Phoenix Islands Time'
 188              case '14':
 189                  return 'Pacific/Kiritimati';        //'[UTC + 14] Line Island Time'
 190              default:
 191                  return 'UTC';
 192          }
 193      }
 194  }