<?php

class Utils {
	public static function fuzzyTime($from, $to = NULL) {
		if (!is_numeric($from)) {
			// handle dates graciously
			$from = strtotime($from);
		}
		if ($to === NULL) {
			$to = time();
		} else if (!is_numeric($to)) {
			$to = strtotime($to);
		}

		$elapsed = $to - $from;
		if ($elapsed < 30) {
			return "Just now";
		}
		if ($elapsed < 60) {
			return "About a minute ago";
		}
		
		// catch all
		$days = floor($elapsed / 86400);
		if ($days == 1) {
            return "Yesterday";
		}
		$str = $days." days ago";
		return $str;
	}
	
	public static function fromCamelCase($str) {
		$str[0] = strtolower($str[0]);
		$func = create_function('$c', 'return "_" . strtolower($c[1]);');
		return preg_replace_callback('/([A-Z])/', $func, $str);
	}

    /* borrowed with thanks from http://wiki.jumba.com.au/wiki/PHP_Generate_random_password */
    public static function generatePassword($length) {
        $chars = "234567890abcdefghijkmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
        $maxLength = strlen($chars) - 1;
        $i = 0;
        $password = "";
        while ($i <= $length) {
            $password .= $chars{mt_rand(0, $maxLength)};
            $i++;
        }
        return $password;
    }
    
    public static function disableMagicQuotesGPC() {
        if (get_magic_quotes_gpc()) {
            $process = array(&$_GET, &$_POST, &$_COOKIE, &$_REQUEST);
            while (list($key, $val) = each($process)) {
                foreach ($val as $k => $v) {
                    unset($process[$key][$k]);
                    if (is_array($v)) {
                        $process[$key][stripslashes($k)] = $v;
                        $process[] = &$process[$key][stripslashes($k)];
                    } else {
                        $process[$key][stripslashes($k)] = stripslashes($v);
                    }
                }
            }
            unset($process);
        }
    }
}