<?php

/*
OneLobby
Copyright (C) 2007 Peter Goodman, Geoffrey Goodman

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
*/

//--------------------------------------------
// Get the relative time, e.g. just now, 10 minutes ago
//--------------------------------------------

function k4_reltime($time) 
{
	if(!$time || $time == 0 || $time == '')
	{
		return "Never";
	}
	
	$delta = time() - $time;
	
	if ($delta < 60) 
	{
		//--------------------------------------------
		// Within this minute.
		//--------------------------------------------
		
		$unit = "second";
		$amount = $delta;
	} 
	elseif ($delta < 3600) 
	{
		//--------------------------------------------
		// Within this hour
		//--------------------------------------------
		
		$unit = "minute";
		$amount = floor($delta / 60);
	} 
	elseif ($delta < 86400) 
	{
		//--------------------------------------------
		// Within this day.
		//--------------------------------------------
		
		$unit = "hour";
		$amount = floor($delta / 3600);
	}
	elseif ($delta < 604800) 
	{
		//--------------------------------------------
		// Within this week.
		//--------------------------------------------
		
		$unit = "day";
		$amount = floor($delta / 86400);
	} 
	elseif ($delta < 86400 * 30) 
	{
		//--------------------------------------------
		// Within this month.
		//--------------------------------------------
		
		$unit = "week";
		$amount = floor($delta / 604800);
	} 
	elseif ($delta < 31536000) 
	{
		//--------------------------------------------
		// Within this year.
		//--------------------------------------------
		
		$unit = "month";
		$amount = floor($delta / (86400 * 30));
	} 
	else 
	{
		//--------------------------------------------
		// > 1 year
		//--------------------------------------------
		
		$unit = "year";
		$amount = floor($delta / 31536000);
	}
	
	$suffix = ($amount > 1) ? 's' : '';
	
	if($delta > 300)
	{
		//--------------------------------------------
		// If this was posted over 5 minutes ago
		//--------------------------------------------
		
		$ret = "$amount $unit$suffix ago";
	}
	else
	{
		//--------------------------------------------
		// This was created within 3 minutes
		//--------------------------------------------
		
		$ret = "just now";
	}
	
	return $ret;
}

//--------------------------------------------
// Replace spaces and other symbols with underscores or
// alphabetical letters for when they are put into the 
// URL's. (for readability)
//--------------------------------------------

function k4_us($str) 
{
	$str = strtr($str, 'ÀÁÂÃÄÅàáâãäåÒÓÔÕÖØòóôõöøÈÉÊËèéêëÇçÌÍÎÏìíîïÙÚÛÜùúûüÿÑñ/\\','AAAAAAaaaaaaOOOOOOooooooEEEEeeeeCcIIIIiiiiUUUUuuuuyNn__');
	$str = preg_replace('~[^a-z0-9_\-]+~i', '_', $str); // ,.?!:\(\)\[\]#@\$%\^\/\\\'"\~`=
	//$str = preg_replace('~(\s|\r|\n|\t)+~', '_', $str);
	return str_replace('__', '_', $str);
}

//--------------------------------------------
// Format a number with commas, e.g.: 1,024
function k4_numfmt($num) 
{
	return number_format($num);
}

//--------------------------------------------
// Truncate a string to the nearest space
//--------------------------------------------

function str_truncate(&$str, $length = 200) 
{	
	
	$len = strlen_utf($str);
	
	//--------------------------------------------
	// Make sure that we don't waste time :P
	//--------------------------------------------
	
	if($len > $length) 
	{
		//--------------------------------------------
		// Look for the first space after the $length cutoff
		//--------------------------------------------
		
		$s = strpos($str, " ", $length);
		if($s !== FALSE) 
		{
			$str = substr_utf($str, 0, $s);
		} 
		else 
		{
			//--------------------------------------------
			// Reverse the string and look for a space before
			// the $length cutoff.
			//--------------------------------------------
			
			$sstr = strrev($str);
			$fs = strpos($sstr, " ", $len - $length);
			
			//--------------------------------------------
			// If we find a space, go there, otherwise, do the
			// normal, direct cutoff.
			//--------------------------------------------
			
			if($fs !== FALSE) 
			{
				$str = substr_utf($str, 0, $length - $fs);
			} 
			else 
			{
				$str = substr_utf($str, 0, $length);
			}
		}
		
		//--------------------------------------------
		// So we've cut the string, append '...' to it to let
		// people know it continues.
		//--------------------------------------------
		
		$str = $str ."...";
	}
	return $str;
}

//--------------------------------------------
// Truncate a string to the nearest space around 300
// characters and strip all HTML tags from the string
// so that nothing in the rest of the page is broken.
//--------------------------------------------

function k4_excerpt($str) 
{
	return str_truncate(strip_tags($str), 300);
}

function k4_excerpt_small($str) 
{
	return str_truncate(strip_tags($str), 150);
}

function k4_excerpt_mini($str) 
{
	return str_truncate(strip_tags($str), 200);
}

function k4_name_short($str)
{
	return str_truncate($str, 40);
}

function k4_rem_spaces($str)
{
	return str_replace(" ", "&nbsp;", $str);;
}

//--------------------------------------------
// Clean a string.
//--------------------------------------------

function k4_clean_string($str)
{
	return htmlentities($str, ENT_QUOTES, K4_CHARSET);
}

?>