<?php

class FormatHelper extends AppHelper {

  static $time;
  static $number;

  function __construct() {
    App::import('Helper', array('Time', 'Number'));
    self::$time = new TimeHelper;
    self::$number = new NumberHelper;
  }

  function _n($amount, $singular, $plural = null) {
    return ($amount . ' ' .
	    __n($singular,
		$plural ? $plural : $singular.'s',
		$amount,
		true));
  }

  function currency($amount) {
    if (!isset($amount))
      return '-';
      //return null;

    return (isset($amount)
	    ? self::$number->currency($amount)
	    : null);
  }

  function date($date, $age = false) {
    if (!$date) return null;

    $date_fmt = 'm/d/Y';
    return (self::$time->format($date_fmt, $date) .
	    ($age
	     ? ' (' . self::age($date) . ')'
	     : ''));
  }

  function datetime($datetime) {
    if (!$datetime) return null;
    return self::$time->nice($datetime);
  }

  function phone($phone) {
    if (!isset($phone))
      return null;

    $phone = preg_replace("/\D/", "", $phone);
    if(strlen($phone) == 7)
      return preg_replace("/(\d{3})(\d{4})/", "$1-$2", $phone);
    elseif(strlen($phone) == 10)
      return preg_replace("/(\d{3})(\d{3})(\d{4})/", "$1-$2-$3", $phone);
    else
      return $phone;
  }

  function comment($comment) {
    if (isset($comment) && is_array($comment)) {
      foreach (array_keys($comment) AS $k) {
	if (!$comment[$k])
	  unset($comment[$k]);
      }
      return implode('; ', $comment);
    }

    return $comment;
  }

  function age($datetime) {
    if (!isset($datetime))
      return null;

    $now = time();
    $seconds = self::$time->fromString($datetime);
    $backwards = ($seconds > $now);

    $timefrom = $backwards ? $now : $seconds;
    $timeto   = $backwards ? $seconds : $now;
    $span = $timeto - $timefrom;

    // Display seconds if under 45 seconds
    if ($span === 0) {
      return __('now', true);
    }
    if ($span < 45) {
      $approx = round($span);
      $unit = 'second';
    }
    // Display minutes if under 45 minutes
    elseif (($span /= 60) < 45) {
      $approx = round($span);
      $unit = 'minute';
    }
    // Display hours if under 18 hours
    elseif (($span /= 60) < 18) {
      $approx = round($span);
      $unit = 'hour';
    }
    // Display days if under 6.5 days
    elseif (($span /= 24) < 6.5) {
      $approx = round($span);
      $unit = 'day';
    }
    // Display weeks if less than 8 weeks
    elseif (($span /= 7) < 8) {
      $approx = round($span);
      $unit = 'week';
    }
    // Display months if less than 20 months
    elseif (($span /= (365.2425 / (7 * 12))) < 20) {
      $approx = round($span);
      $unit = 'month';

      // Months are from 28-31 days.  If it's too
      // close to being an exact month, just fudge
      // by saying the result is 'about' N months
      // instead of 'almost' or 'over' N months,
      // since we can't be accurate on this without
      // taking into account the day of the week.
      if ((abs($span - $approx) * (365.2425 / 12)) < 3)
	$relative = 'about';
    }
    else {
      $span /= 12;
      $approx = round($span);
      $unit = 'year';
    }

    return (__(isset($relative)
	       ? $relative
	       : ($approx == $span
		  ? ''
		  : ($approx > $span ? 'almost' : 'over')), true)
	    . ' '
	    . self::_n($approx, $unit)
	    . ($backwards ? '' : __(' ago', true)));
  }

/*****************************
 ** Test code
 **/
/* function basevals($max) { */
/*   return incrvals($max); */
/*   if ($max % 2) { */
/*     return array(0, 1, ($max+1)/2-1, $max/2, ($max+1)/2, $max-1); */
/*   } */
/*   else { */
/*     return array(0, 1, $max/2-1, $max/2, $max/2+1, $max-1); */
/*   } */
/* } */

/* function incrvals($max, $suppress = false) { */
/*   if ($suppress) */
/*     //return array(0); */
/*     return array(0, 4, $max-1); */

/*   //return array(0, 1, $max/3, (int)(($max+1)/2)-1, 2*$max/3, 3*$max/4, 4*$max/5, $max-1); */
/*   return array(0, 1, 3, $max/2+2, (int)(($max+1)/2)+4, 2*$max/3, 3*$max/4, 4*$max/5, $max-1); */
/* } */

/* echo('<TABLE>' . "\n"); */
/* foreach (incrvals(10) AS $y) { */
/*   foreach (incrvals(12, $y) AS $w) { */
/*     foreach (incrvals(30, $y||$w) AS $d) { */
/*       foreach (incrvals(24, $y||$w||$d) AS $h) { */
/* 	foreach (incrvals(60, $y||$w||$d||$h) AS $m) { */
/* 	  foreach ($y||$w||$d||$h||$m ? array(0,1,59) : basevals(60) AS $s) { */
/* 	    $seconds = 60*(60*(24*(30*(12*$y +$w) + $d) + $h) + $m) + $s; */
/* 	    //$seconds = 60*(60*(24*(7*(52*$y +$w) + $d) + $h) + $m) + $s; */
/* 	    $age = time() - $seconds; */
/* 	    echo ('<TR>' */
/* 		  . ' <TD>' . "y:$y; M:$w; d:$d; h:$h; m:$m; s:$s" . '</TD>' */
/* 		  . ' <TD>' . FormatHelper::datetime($age) . '</TD>' */
/* 		  . ' <TD>' . FormatHelper::age($age) . '</TD>' */
/* 		  . ' <TD>' . $seconds . '; days='.($seconds/60/60/24).'</TD>' */
/* 		  .'</TR>' . "\n"); */
/* 	  } */
/* 	} */
/*       } */
/*     } */
/*   } */
/* } */
/* echo('</TABLE>' . "\n"); */

}