<?php
define('TIME_FORMAT_MINITE', '%s分钟前');
define('TIME_FORMAT_TODAY', '今天 %s');
define('TIME_FORMAT_YESTODAY', '昨天 %s');
define('TIME_FORMAT_HISTORY', '%s-%s-%s');
define('TIME_FORMAT_HISTORY_VISITOR', '%s月%s日');
define('TIME_FORMAT_CAPTION_TODAY','今天');
define('TIME_FORMAT_CAPTION_YESTODAY','昨天');
define('TIME_FORMAT_CAPTION_YEAR','年');
define('TIME_FORMAT_CAPTION_MONTH','月');
define('TIME_FORMAT_CAPTION_DAY','日');
define('TIME_FORMAT_CAPTION_HOUR','点');
define('TIME_FORMAT_CAPTION_MINITE','分');
define('TIME_FORMAT_CAPTION_SECOND','秒');
define('TIME_FORMAT_EVENT_NOYEAR', '%s月%s日 周%s %s');
define('TIME_FORMAT_EVENT_WITHYEAR', '%s年%s月%s日 周%s %s');
define('TIME_FORMAT_WHOLE',  '%s年%s月%s日 %s');
define('TIME_FORMAT_EVENT_MINUTE',  '%s:%s');

class Lib_Utils_TimeFormat 
{
	public static function timeFormat($time) 
	{ 
		$now = time();
		if (strpos($time, '-') !== false) 
		{
			$time = strtotime($time);
		}
		if (($dur = $now - $time) < 3600) 
		{
			$minutes = ceil($dur / 60);
			if ($minutes <= 0) 
			{
				$minutes = 1;
			}
			$time = sprintf(TIME_FORMAT_MINITE, $minutes);
		}
		else if (date('Ymd', $now) == date('Ymd', $time)) 
		{
			$time = sprintf(TIME_FORMAT_TODAY, date('H:i', $time));
		}
		else
		{
			if (date('Y') == date('Y',$time))
			{
				$time = sprintf(TIME_FORMAT_HISTORY_VISITOR,date('n',$time),date('j',$time)) . ' ' . date('H:i',$time);
			}
			else
			{
				$time = sprintf(TIME_FORMAT_HISTORY, date('Y',$time),date('n',$time),date('j',$time)) . ' ' . date('H:i',$time);
			}
		}
		return $time;
	}
	
	
	public static function staticHtmlTimeFormat($time)
	{
		$now = time();
		if (strpos($time, '-')!==false) 
		{
			$time = strtotime($time);
		}
		$time = sprintf(TIME_FORMAT_WHOLE, date('Y',$time),date('n',$time), date('j',$time), date('H:i',$time));
	
		return $time;
	}

	public static function timeFormatGroup($time) 
	{
		$now = time();
		if (strpos($time, '-') !== false)
	    {
			$time = strtotime($time);
		}
		if(($dur = $now - $time) < 3600) 
		{
			$minutes = ceil($dur / 60);
			if ($minutes<=0)
			{
				$minutes = 1;
			}
			$time = sprintf(TIME_FORMAT_MINITE, $minutes);
		}
		else if (date('Ymd', $now) == date('Ymd', $time)) 
		{
			$time = sprintf(TIME_FORMAT_TODAY, date('H:i', $time));
		}
		else
		{
			$time = sprintf('%s-%s %s:%s', date('m',$time),date('d',$time),date('H',$time),date('i',$time));
		}
		return $time;
	}
	
	public static function timeFormatVisitor($time) 
	{
		$now = time();
		if(($dur = $now - $time) < 3600) 
		{
			$minutes = ceil($dur / 60);
			if ($minutes<=0)
			{
				$minutes = 1;
			}
			$time = sprintf(TIME_FORMAT_MINITE, $minutes);
		}
		elseif (date('Ymd', $now) == date('Ymd', $time)) 
		{
			$time = sprintf(TIME_FORMAT_TODAY, date('H:i', $time));
		}
		else
		{
			$time = sprintf(TIME_FORMAT_HISTORY_VISITOR, date('n',$time),date('j',$time));
		}
		return $time;
	}

	public static function timeFormatArr($time) 
	{
		$retime = array();
		$now = time();
		if (strpos($time, '-') !== false) 
		{
			$time = strtotime($time);
		}
		if(($dur = $now - $time) < 3600) 
		{
			$minutes = ceil($dur / 60);
			if ($minutes<=0)
			{
				$minutes = 1;
			}
			$retime['date'] = TIME_FORMAT_CAPTION_TODAY;
			$retime['time'] = sprintf(TIME_FORMAT_MINITE, $minutes);
		}
		else if (date('Ymd', $now) == date('Ymd', $time)) 
		{
			$retime['date'] = TIME_FORMAT_CAPTION_TODAY;
			$retime['time'] = date('H:i', $time);
		}
		else
		{
			$retime['date'] = date('n', $time).TIME_FORMAT_CAPTION_MONTH.date('j', $time).TIME_FORMAT_CAPTION_DAY;
			$retime['time'] = date('H:i', $time);
		}
		return $retime;
	}
	
	public static function eventTimeFormat($start, $end) 
	{
		$week = array(1=>'一',2=>'二',3=>'三',4=>'四',5=>'五',6=>'六',7=>'日');
		$sweek = date('N', $start);
		$eweek = date('N', $end);
		if (date('Ymd', $start) == date('Ymd', $end)) //同一天
		{
			$time = sprintf(TIME_FORMAT_EVENT_NOYEAR, date('n', $start), date('j', $start), $week[$sweek], date('H:i', $start) . ' - ' . date('H:i', $end));
		}
		else if (date('Y', $start) == date('Y', $end)) //同一年不同天
		{
			$stime = sprintf(TIME_FORMAT_EVENT_NOYEAR, date('n', $start), date('j', $start), $week[$sweek], date('H:i', $start));
			$etime = sprintf(TIME_FORMAT_EVENT_NOYEAR, date('n', $end), date('j', $end), $week[$eweek], date('H:i', $end));
			$time = $stime . ' - ' . $etime;
		}
		else //不是同一年
		{
			$stime = sprintf(TIME_FORMAT_EVENT_WITHYEAR, date('Y', $start), date('n', $start), date('j', $start), $week[$sweek], date('H:i', $start));
			$etime = sprintf(TIME_FORMAT_EVENT_WITHYEAR, date('Y', $end), date('n', $end), date('j', $end), $week[$eweek], date('H:i', $end));
			$time = $stime . ' - ' . $etime;
		}
		return $time;
	}
	/**
	 * 倒计时格式化
	 *
	 * @param int $begin_time 开始时间
	 * @param int $end_time 结束时间
	 * @return array    {unit:单位 , num:数值}
	 */
	public static function countdownFormat(  $begin_time ,   $end_time)
	{
	    $unit = $num = '' ;
	    $offset = $end_time - $begin_time ;
	    $max_second = 60 ;
	    $hour_second = 60*60 ;
	    $day_sencond =  24*60*60 ;
	    do
	    {
    	    if ($offset <= 0 )
    	    {
                $unit = '秒';
                $num = 0 ;    	        
    	        break ;
    	    }
    	    //秒  小于指定数则
    	    if ($offset <= $max_second)
    	    {
    	        $unit = '秒';
                $num = $offset ;
    	    }
    	    //分钟
    	    if ($offset > $max_second && $offset < $hour_second)
    	    {
    	        $unit = '分钟';
    	        $num  = intval($offset/$max_second );
    	        break ;
    	    }
    	    //小时
    	    if ($offset < $day_sencond)
    	    {
    	        $unit = '小时';
    	        $num  = round($offset/$hour_second,1 );
    	        break ;
    	    }
	        //天
	        $num = round( $offset/$day_sencond,1 );
	        $unit = '天';
	        break ;
	    }while (false);
	    return array('unit' => $unit, 'num' => $num) ;
	}
	
	/**
	 * 分钟格式化
	 * 
	 * @param int $time
	 * @return string
	 */
	public static function minuteFormat($time)
	{
		$minutes = sprintf('%02d', floor($time / 60));
		$seconds = sprintf('%02d', ceil($time % 60));
		return sprintf(TIME_FORMAT_EVENT_MINUTE, $minutes, $seconds);
	}
}