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<?php
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/**
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 * Description of class
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 *
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 * @author wkl
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 */
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class msgQueue {
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/** define type of retval */
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    const RETVAL_ARRAY  = 0;
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    const RETVAL_STRING = 1; // (default)
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/** */
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    const LOG      = 0;
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    const ERROR    = 1; // (default)
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    const SUCCESS  = 2;
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    const OK       = 2;
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    const WARN     = 4;
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    const SHOW_ALL = 0;
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    const ALL      = 0;
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/**  */
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    private static $_instance;
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/**  */
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    private $aLogs    = array();
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/**
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 * constructor
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 */
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    protected function __construct() {
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        $this->aLogs = array();
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    }
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/** disable cloning */
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    private function __clone() { }
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/**
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 * get handle for active instance
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 */
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    public static function getInstance()
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    {
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        if (!isset(self::$_instance)) {
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            $c = __CLASS__;
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            self::$_instance = new $c;
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        }
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        return self::$_instance;
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    }
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/**
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 * push new message in queue
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 * @param string $sMessage
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 * @param int $iStatus (default: self::FAIL)
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 */
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    public static function add($sMessage = '', $iStatus = self::ERROR)
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    {
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        $iStatus =
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            ($iStatus === true ? self::OK : ($iStatus === false ? self::ERROR : $iStatus)) ?: self::ERROR;
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        self::getInstance()->aLogs[self::LOG][] = array('status'=>self::WARN, 'msg'=>$sMessage);
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        self::getInstance()->aLogs[$iStatus][]  = $sMessage;
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    }
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/**
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 *
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 * @param int $iStatus
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 */
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    public static function clear($iStatus = self::ALL)
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    {
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        if ($iStatus == self::ALL) {
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            self::getInstance()->aLogs = array();
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        } else {
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            if (isset(self::getInstance()->aLogs[$iStatus])) {
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                self::getInstance()->aLogs[$iStatus] = array();
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            }
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        }
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    }
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/**
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 *
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 * @param int $iStatus (default: self::ALL)
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 * @return bool
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 */
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    public static function isEmpty($iStatus = self::ALL)
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    {
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        if ($iStatus == self::ALL) {
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            return (sizeof(self::getInstance()->aLogs[self::LOG]) == 0);
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        } else {
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            return (isset(self::getInstance()->aLogs[$iStatus]) == false);
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        }
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    }
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/**
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 * returns selected kind of messages
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 * @param type $iStatus  which messages
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 * @param type $iRetvalType  return as string or array(default)
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 * @return mixed  string|array
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 */
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    public static function getMessages($iStatus = self::ERROR, $iRetvalType = self::RETVAL_Array)
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    {
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        $aRetval = array();
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        if ($iStatus == self::SHOW_ALL) {
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            return self::getInstance()->aLogs[self::LOG];
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        } else {
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            if (isset(self::getInstance()->aLogs[$iStatus])) {
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                foreach (self::getInstance()->aLogs[$iStatus] as $aItem) {
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                    $aRetval[] = $aItem['msg'];
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                }
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            }
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        }
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        return ($iRetvalType == self::RETVAL_STRING ? implode("\n", $aRetval) : $aRetval);
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    }
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/**
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 *
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 * @param int $iType
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 * @return mixed
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 * @deprecated set deprecated since 2.8.4 and removed in next version
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 */
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    public static function getError($iType = self::RETVAL_STRING)
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    {
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        return self::getMessages(self::ERROR, $iType);
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    }
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/**
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 *
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 * @param int $iType
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 * @return mixed
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 * @deprecated set deprecated since 2.8.4 and removed in next version
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 */
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    public static function getSuccess($iType = self::RETVAL_STRING)
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    {
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        return self::getMessages(self::OK, $iType);
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    }
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} // end of class msgQueue
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