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<?php
/**
*
* @package phpBB3
* @version $Id$
* @copyright (c) 2005 phpBB Group
* @license http://opensource.org/licenses/gpl-license.php GNU Public License
*
*/
/**
* @ignore
*/
if (!defined('IN_PHPBB'))
{
exit;
}
/**
* Group Position class, containing all functions to manage the groups in the teampage and legend.
*
* group_teampage/group_legend is an ascending list 1, 2, ..., n for groups which are displayed. 1 is the first group, n the last.
* If the value is 0 (self::GROUP_DISABLED) the group is not displayed.
* @package phpBB3
*/
class phpbb_group_positions
{
/**
* Group is not displayed
*/
const GROUP_DISABLED = 0;
/**
* Returns the group_{$field} for a given group, if the group exists.
* @param string $field name of the field to be selected
* @param int $group_id group_id of the group to be selected
* @return int position of the group
*/
static function get_group_value($field, $group_id)
{
global $db;
$sql = 'SELECT group_' . $field . '
FROM ' . GROUPS_TABLE . '
WHERE group_id = ' . (int) $group_id;
$result = $db->sql_query($sql);
$current_value = $db->sql_fetchfield('group_' . $field);
$db->sql_freeresult($result);
if ($current_value === false)
{
// Group not found.
global $user;
trigger_error($user->lang['NO_GROUP'] . adm_back_link($this->u_action), E_USER_WARNING);
}
return (int) $current_value;
}
/**
* Get number of groups, displayed on the teampage/legend
* @param string $field name of the field to be counted
* @return int value of the last group displayed
*/
static function get_group_count($field)
{
global $db;
$sql = 'SELECT group_' . $field . '
FROM ' . GROUPS_TABLE . '
ORDER BY group_' . $field . ' DESC';
$result = $db->sql_query_limit($sql, 1);
$group_count = (int) $db->sql_fetchfield('group_' . $field);
$db->sql_freeresult($result);
return $group_count;
}
/**
* Addes a group by group_id
* @param string $field name of the field the group is added to
* @param int $group_id group_id of the group to be added
* @return void
*/
static function add_group($field, $group_id)
{
$current_value = self::get_group_value($field, $group_id);
if ($current_value == self::GROUP_DISABLED)
{
global $db;
// Group is currently not displayed, add it at the end.
$next_value = 1 + self::get_group_count($field, $field);
$sql = 'UPDATE ' . GROUPS_TABLE . '
SET group_' . $field . ' = ' . $next_value . '
WHERE group_' . $field . ' = ' . self::GROUP_DISABLED . '
AND group_id = ' . (int) $group_id;
$db->sql_query($sql);
}
}
/**
* Deletes a group by group_id
* @param string $field name of the field the group is deleted from
* @param int $group_id group_id of the group to be deleted
* @return void
*/
static function delete_group($field, $group_id)
{
$current_value = self::get_group_value($field, $group_id);
if ($current_value != self::GROUP_DISABLED)
{
global $db;
$db->sql_transaction('begin');
$sql = 'UPDATE ' . GROUPS_TABLE . '
SET group_' . $field . ' = group_' . $field . ' - 1
WHERE group_' . $field . ' > ' . $current_value;
$db->sql_query($sql);
$sql = 'UPDATE ' . GROUPS_TABLE . '
SET group_' . $field . ' = ' . self::GROUP_DISABLED . '
WHERE group_id = ' . (int) $group_id;
$db->sql_query($sql);
$db->sql_transaction('commit');
}
}
/**
* Moves a group up by group_id
* @param string $field name of the field the group is moved by
* @param int $group_id group_id of the group to be moved
* @return void
*/
static function move_up($field, $group_id)
{
$current_value = self::get_group_value($field, $group_id);
// Only move the group, if it is in the list and not already on top.
if ($current_value > 1)
{
global $db;
$db->sql_transaction('begin');
$sql = 'UPDATE ' . GROUPS_TABLE . '
SET group_' . $field . ' = group_' . $field . ' + 1
WHERE group_' . $field . ' = ' . ($current_value - 1);
$db->sql_query($sql);
$sql = 'UPDATE ' . GROUPS_TABLE . '
SET group_' . $field . ' = ' . ($current_value - 1) . '
WHERE group_id = ' . (int) $group_id;
$db->sql_query($sql);
$db->sql_transaction('commit');
}
}
/**
* Moves a group down by group_id
* @param string $field name of the field the group is moved by
* @param int $group_id group_id of the group to be moved
* @return void
*/
static function move_down($field, $group_id)
{
$current_value = self::get_group_value($field, $group_id);
if ($current_value != self::GROUP_DISABLED)
{
global $db;
$db->sql_transaction('begin');
$sql = 'UPDATE ' . GROUPS_TABLE . '
SET group_' . $field . ' = group_' . $field . ' - 1
WHERE group_' . $field . ' = ' . ($current_value + 1);
$db->sql_query($sql);
if ($db->sql_affectedrows() == 1)
{
// Only update when we move another one up, otherwise it was the last.
$sql = 'UPDATE ' . GROUPS_TABLE . '
SET group_' . $field . ' = ' . ($current_value + 1) . '
WHERE group_id = ' . (int) $group_id;
$db->sql_query($sql);
}
$db->sql_transaction('commit');
}
}
/**
* Get group type language var
* @param int $group_type group_type from the groups-table
* @return string name of the language variable for the given group-type.
*/
static function group_type_language($group_type)
{
switch ($group_type)
{
case GROUP_OPEN:
return 'GROUP_REQUEST';
case GROUP_CLOSED:
return 'GROUP_CLOSED';
case GROUP_HIDDEN:
return 'GROUP_HIDDEN';
case GROUP_SPECIAL:
return 'GROUP_SPECIAL';
case GROUP_FREE:
return 'GROUP_OPEN';
}
}
}
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