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/**
***********************************************************************************************
* @copyright 2004-2016 The Admidio Team
* @see http://www.admidio.org/
* @license https://www.gnu.org/licenses/gpl-2.0.html GNU General Public License v2.0 only
***********************************************************************************************
*/
/**
* @class Participants
* @brief This class gets information about participants and leaders of dates.
*
* This function is developed, to read the participants and leaders of dates from database.
* Participants and leaders can be counted or be written in an array with surname, firstname and leader-status.
* Also the limit of participation can to be calculated.
* This class is flexible in usage. It is possible to pass the paramter of the rolId when creating an instance
* of this object. The Id will be checked and stored in the object. So no parameters are required when calling
* a function.
* Second possibility is to pass the Id to a function of this object. The stored value in current object will be overwritten.
* This is recommended looping an array, for example, with various Id´s.
*/
class Participants
{
private $rolId; ///< RolId of the current date of this object.
private $leader; ///< The number of leaders of the date in the current object
private $count; ///< Counter of participants of the date in current object.
private $order; ///< SQL order of results. Parameter 'ASC'/'DESC' (Default: 'ASC')
public $memberDate; ///< Array with surname, firstname of all participants of the date in current object.
public $mDb; ///< db object must public because of session handling
/**
* Constructor that will initialize variables and check if $rolId is numeric
* @param \Database $database Object of the class Database. This should be the default global object @b $gDb.
* @param int $rolId The role ID of a date
*/
public function __construct(&$database, $rolId = 0)
{
$this->mDb =& $database;
$this->clear();
$this->checkId($rolId);
}
public function __destruct()
{
unset($this);
}
/**
* This function checks the passed Id if it is numeric and compares it to the current object variable
* If the values are different the current object variable will be updated with the new value
* @param int $roleId
* @return bool
*/
private function checkId($roleId)
{
// check passed parameter and compare to current object
if($this->rolId === -1 || ($this->rolId === 0 && $this->rolId !== $roleId))
{
$this->rolId = $roleId;
return true;
}
return false;
}
/**
* Initialize all parameters of the object
*/
public function clear()
{
$this->count = -1;
$this->leader = -1;
$this->rolId = -1;
$this->order = '';
$this->memberDate = '';
}
/**
* Count participants of the date.
* @param int $rolId
* @return int Returns the result of counted participants as numeric value in current object. Leaders are not counted!
*/
public function getCount($rolId = 0)
{
if($rolId !== 0)
{
$this->clear();
$this->checkId($rolId);
}
$sql = 'SELECT DISTINCT mem_usr_id, mem_leader
FROM '.TBL_MEMBERS.'
WHERE mem_rol_id = '.$this->rolId.'
AND mem_end >= \''.DATE_NOW.'\'';
$membersStatement = $this->mDb->query($sql);
// Write all member Id´s and leader status in an array
$numParticipants = array();
while ($row = $membersStatement->fetch())
{
$numParticipants [] = array('member' => $row['mem_usr_id'], 'leader' => $row['mem_leader']);
}
// count the number of leaders of the date
$leader = 0;
foreach ($numParticipants as $member)
{
if($member['leader'] != 0)
{
++$leader;
}
}
// check if class variables $count and $leader are set to default flag.
if($this->count === -1 && $this->leader === -1)
{
// Then Store the results in class variables.
$this->count = count($numParticipants);
$this->leader = $leader;
}
return $this->count - $this->leader;
}
/**
* Get the limit of participants.
* @param int $rolId
* @return int Returns the limit of participants as numeric value of the current object. Leaders are not counted!
*/
public function getLimit($rolId = 0)
{
// check if class variables $count and $leader are set to default flag.
if($this->count === -1 && $this->leader === -1)
{
// get data from database
$this->getCount($rolId);
}
return $this->count - $this->leader;
}
/**
* Get the number of leaders.
* @param int $rolId
* @return int Returns the number of leaders as numeric value of the current object.
*/
public function getNumLeaders($rolId = 0)
{
// check if class variables $count and $leader are set to default flag.
if($this->count === -1 && $this->leader === -1)
{
// get data from database
$this->getCount($rolId);
}
return $this->leader;
}
/**
* Return all participants with surname,firstname and leader status as array
* @param int $roleId
* @param string $order Values ASC/DESC Default: 'ASC'
* @return array|false Returns all participants in an array with fieldnames ['surname'], ['firstname'], ['leader'].
*/
public function getParticipantsArray($roleId = 0, $order = 'ASC')
{
global $gProfileFields;
if (!in_array($order, array('ASC', 'DESC'), true))
{
return false;
}
$this->checkId($roleId);
$this->order = $order;
$sql = 'SELECT DISTINCT
surname.usd_value AS surname, firstname.usd_value AS firstname, mem_leader
FROM '.TBL_MEMBERS.'
LEFT JOIN '. TBL_USER_DATA .' surname
ON surname.usd_usr_id = mem_usr_id
AND surname.usd_usf_id = '.$gProfileFields->getProperty('LAST_NAME', 'usf_id').'
LEFT JOIN '. TBL_USER_DATA .' firstname
ON firstname.usd_usr_id = mem_usr_id
AND firstname.usd_usf_id = '.$gProfileFields->getProperty('FIRST_NAME', 'usf_id').'
WHERE mem_rol_id = '.$this->rolId.'
ORDER BY surname '.$this->order;
$membersStatement = $this->mDb->query($sql);
$participants = array();
while ($row = $membersStatement->fetch())
{
$participants[] = array(
'surname' => $row['surname'],
'firstname' => $row['firstname'],
'leader' => $row['mem_leader']
);
}
$this->memberDate = $participants;
return $this->memberDate;
}
}