made some changes to date parsing trying to fix bugs

[squirrelmail.git] / functions / date.php

<?php
   /**
    **  date.php
    **
    **  Takes a date and parses it into a usable format.  The form that a
    **  date SHOULD arrive in is:
    **        <Tue,> 29 Jun 1999 09:52:11 -0500 (EDT)
    **  (as specified in RFC 822) -- "Tue" is optional
    **
    **/

   $date_php = true;

   function getMinutes($hour) {
      $date = $hour;

      if (($hour == 0) || ($hour == "00"))
         $date = "00";
      else if (($hour == 1) || ($hour == "01"))
         $date = "01";
      else if (($hour == 2) || ($hour == "02"))
         $date = "02";
      else if (($hour == 3) || ($hour == "03"))
         $date = "03";
      else if (($hour == 4) || ($hour == "04"))
         $date = "04";
      else if (($hour == 5) || ($hour == "05"))
         $date = "05";
      else if (($hour == 6) || ($hour == "06"))
         $date = "06";
      else if (($hour == 7) || ($hour == "07"))
         $date = "07";
      else if (($hour == 8) || ($hour == "08"))
         $date = "08";
      else if (($hour == 9) || ($hour == "09"))
         $date = "09";

      return $date;
   }

   // corrects a time stamp to be the local time
   function getGMTSeconds($stamp, $gmt) {
      if (($gmt == "Pacific") || ($gmt == "PST"))
         $gmt = "-0800";
      else if (($gmt == "EDT"))
         $gmt = "-0400";
      else if (($gmt == "Eastern") || ($gmt == "EST") || ($gmt == "CDT"))
         $gmt = "-0500";
      else if (($gmt == "Central") || ($gmt == "CST") || ($gmt == "MDT"))
         $gmt = "-0600";
      else if (($gmt == "Mountain") || ($gmt == "MST") || ($gmt == "PDT"))
         $gmt = "-0700";
      else if ($gmt == "BST")
         $gmt = "+0100";
      else if ($gmt == "EET")
         $gmt = "+0200";
      else if ($gmt == "GMT")
         $gmt = "+0000";
      else if ($gmt == "HKT")
         $gmt = "+0800";
      else if ($gmt == "IST")
         $gmt = "+0200";
      else if ($gmt == "JST")
         $gmt = "+0900";
      else if ($gmt == "MET")
         $gmt = "+0100";
      else if ($gmt == "MET DST" || $gmt == "METDST")
         $gmt = "+0200";
      
      if ($gmt = "")
         $gmt = "+0000";

      /*
      if (substr($gmt, 0, 1) == "-") {
         $neg = true;
         $gmt = substr($gmt, 1, strlen($gmt));
      } else if (substr($gmt, 0, 1) == "+") {
         $neg = false;
         $gmt = substr($gmt, 1, strlen($gmt));
      } else
         $neg = false;

      $gmt = substr($gmt, 0, 2);
      $gmt = $gmt * 3600;
      if ($neg == true)
         $gmt = "-$gmt";
      else
         $gmt = "+$gmt";
      */

      /** now find what the server is at **/
      $current = date("Z", time());
      $stamp = (int)$stamp - (int)$gmt + (int)$current;

      return $stamp;
   }

   function getHour($hour) {
      $time = explode(":", $hour);
      return $time[0];
   }

   function getMinute($min) {
      $time = explode(":", $min);
      return $time[1];
   }

   function getSecond($sec) {
      $time = explode(":", $sec);
      return $time[2];
   }

   function getMonthNum($month) {
      if (eregi("jan|january", $month, $tmp))
         $date = "01";
      else if (eregi("feb|february|febuary", $month, $tmp))
         $date = "02";
      else if (eregi("mar|march", $month, $tmp))
         $date = "03";
      else if (eregi("apr|april", $month, $tmp))
         $date = "04";
      else if (eregi("may", $month, $tmp))
         $date = "05";
      else if (eregi("jun|june", $month, $tmp))
         $date = "06";
      else if (eregi("jul|july", $month, $tmp))
         $date = "07";
      else if (eregi("aug|august", $month, $tmp))
         $date = "08";
      else if (eregi("sep|sept|september", $month, $tmp))
         $date = "09";
      else if (eregi("oct|october", $month, $tmp))
         $date = "10";
      else if (eregi("nov|november", $month, $tmp))
         $date = "11";
      else if (eregi("dec|december", $month, $tmp))
         $date = "12";

      return $date;
   }

   function getDayOfWeek($day) {
      $date = "{WEEKDAY}";

      if (eregi("(mon|monday)", $day, $tmp))
         $date = "Mon";
      else if (eregi("(tue|tuesday)", $day, $tmp))
         $date = "Tue";
      else if (eregi("(wed|wednesday)", $day, $tmp))
         $date = "Wed";
      else if (eregi("(thurs|thu|thursday)", $day, $tmp))
         $date = "Thu";
      else if (eregi("(fri|friday)", $day, $tmp))
         $date = "Fri";
      else if (eregi("(sat|saturday)", $day, $tmp))
         $date = "Sat";
      else if (eregi("(sun|sunday)", $day, $tmp))
         $date = "Sun";

      return $date;
   }

   function getDayOfMonth($day) {
      return ereg_replace("^0", "", $day); /* remove a preceeding 0 */
   }

   function getMonth($month) {
      $date = "{MONTH}";
      if (eregi("jan|january", $month, $tmp))
         $date = "Jan";
      else if (eregi("feb|february|febuary", $month, $tmp))
         $date = "Feb";
      else if (eregi("mar|march", $month, $tmp))
         $date = "Mar";
      else if (eregi("apr|april", $month, $tmp))
         $date = "Apr";
      else if (eregi("may", $month, $tmp))
         $date = "May";
      else if (eregi("jun|june", $month, $tmp))
         $date = "Jun";
      else if (eregi("jul|july", $month, $tmp))
         $date = "Jul";
      else if (eregi("aug|august", $month, $tmp))
         $date = "Aug";
      else if (eregi("sep|sept|september", $month, $tmp))
         $date = "Sep";
      else if (eregi("oct|october", $month, $tmp))
         $date = "Oct";
      else if (eregi("nov|november", $month, $tmp))
         $date = "Nov";
      else if (eregi("dec|december", $month, $tmp))
         $date = "Dec";

      return $date;
   }

   function getYear($year) {
      return $year;
   }

   function getLongDateString($stamp) {
      return date("D, F j, Y g:i a", $stamp);
   }

   function getDateString($stamp) {
      $now = time();
      $midnight = $now - ($now % 86400) - date("Z", $now);

      if ($midnight < $stamp) {
         // Today
         return date("g:i a", $stamp);
      } else if ($midnight - (60 * 60 * 24 * 6) < $stamp) {
         // This week
         return date("D, g:i a", $stamp);
      } else {
         // before this week 
         return date("M j, Y", $stamp);
      }
   }

   function getTimeStamp($dateParts) {
      /** $dateParts[0] == <day of week>   Mon, Tue, Wed
       ** $dateParts[1] == <day of month>  23
       ** $dateParts[2] == <month>         Jan, Feb, Mar
       ** $dateParts[3] == <year>          1999
       ** $dateParts[4] == <time>          18:54:23 (HH:MM:SS)
       ** $dateParts[5] == <from GMT>      +0100
       ** $dateParts[6] == <zone>          (EDT)
       **
       ** NOTE:  In RFC 822, it states that <day of week> is optional.
       **        In that case, dateParts[0] would be the <day of month>
       **        and everything would be bumped up one.
       **/

      // Simply check to see if the first element in the dateParts
      // array is an integer or not.
      //    Since the day of week is optional, this check is needed.  
      //    
      //    The old code used eregi("mon|tue|wed|thu|fri|sat|sun",
      //    $dateParts[0], $tmp) to find if the first element was the
      //    day of week or day of month. This is an expensive call
      //    (processing time) to have inside a loop. Doing it this way
      //    saves quite a bit of time for large mailboxes.
      //
      //    It is also quicker to call explode only once rather than
      //    the 3 times it was getting called by calling the functions
      //    getHour, getMinute, and getSecond.
      //
      if (intval(trim($dateParts[0])) > 0) {
         $time = explode(":", $dateParts[3]);
         $d[0] = $time[0];
         $d[1] = $time[1];
         $d[2] = $time[2];
         $d[3] = getMonthNum(trim($dateParts[1]));
         $d[4] = getDayOfMonth(trim($dateParts[0]));
         $d[5] = getYear(trim($dateParts[2]));
         return getGMTSeconds(mktime($d[0], $d[1], $d[2], $d[3], $d[4], $d[5]), $dateParts[4]);
      }
      $time = explode(":", $dateParts[4]);
      $d[0] = $time[0];
      $d[1] = $time[1];
      $d[2] = $time[2];
      $d[3] = getMonthNum(trim($dateParts[2]));
      $d[4] = getDayOfMonth(trim($dateParts[1]));
      $d[5] = getYear(trim($dateParts[3]));
      return getGMTSeconds(mktime($d[0], $d[1], $d[2], $d[3], $d[4], $d[5]), $dateParts[5]);
   }

   // I use this function for profiling. Should never be called in
   // actual versions of squirrelmail released to public.
   function getmicrotime() {
      $mtime = microtime();
      $mtime = explode(" ",$mtime);
      $mtime = $mtime[1] + $mtime[0];
      return ($mtime);
   }
?>