/adei/trunk

<?php

interface READERTimeInterface {

 public function __construct(READER $reader = NULL, $opts = false);

 public function ImportTime(DateTime $dt);

 public function ExportTime($db_time);

 public function GetTimeSlicingFunction($db_time_var, $width, $offset = 0);

}

abstract class NULLReaderTime implements READERTimeInterface {

 var $gmt_timezone;

 public function __construct(READER $reader = NULL, $opts = false) {

    if ($reader) $this->gmt_timezone = $reader->gmt_timezone;

    else $this->gmt_timezone = new DateTimeZone("GMT");

 }

 public function ImportTime(DateTime $dt) {

    throw new ADEIException(translate("CLASS %s: Methods (%s) is not implemented", get_class($this),  __METHOD__));

 }

 public function ExportTime($db_time) {

    throw new ADEIException(translate("CLASS %s: Methods (%s) is not implemented", get_class($this),  __METHOD__));

 }

 public function GetTimeSlicingFunction($db_time_var, $width, $offset = 0) {

    throw new ADEIException(translate("CLASS %s: Methods (%s) is not implemented", get_class($this),  __METHOD__));

 }

 function ImportUnixTime($unix_time) {

    $itime = floor($unix_time);

    if ($itime==$unix_time) {

            // Time zone should be specified, esle "e" output is invalid

	return $this->ImportTime(new DateTime("@" . sprintf("%f", $itime), $this->gmt_timezone));

    } else {

	if (is_float($unix_time)) $subsec = strchr(sprintf("%F", $unix_time), '.');

	else $subsec = strchr($unix_time, '.');

	    // DS: Due to the bug in PHP (precision is limited to 10ns)

	if (strlen($subsec) > 9) $subsec = substr($subsec, 0, 9);

	return $this->ImportTime(new DateTime(strftime("%Y-%m-%dT%H:%M:%S", $itime) . $subsec, $this->gmt_timezone));

//	return $this->ImportTime(new DateTime(strftime("%Y/%m/%d %H:%M:%S", $itime) . $subsec, $this->gmt_timezone));

    }

 }

 function ExportUnixTime($db_time) {

    $dt = $this->ExportTime($db_time);

    return $dt->format("U.u");

 }

}

class READERTime extends NULLReaderTime implements READERTimeInterface {

 var $time_zone;

 var $time_format;

 public function __construct(READER $reader = NULL, $opts = false) {

    parent::__construct($reader, $opts);

    $this->time_format = $opts['format'];

    $this->time_zone = $opts['timezone'];

 }

 public function ImportTime(DateTime $dt) {

    $dt->setTimezone($this->time_zone);

    return $dt->format($this->time_format);

 }

 public function ExportTime($db_time) {

    if ($this->time_zone) {

        $ctz = date_default_timezone_get();

	date_default_timezone_set($this->time_zone->getName());

	switch ($this->time_format) {

	    case "U":

		$dt = new DateTime("@" . $db_time);

	    break;

	    default:

		$dt = new DateTime($db_time);

	}

	date_default_timezone_set($ctz);

//	$dt->setTimezone($this->gmt_timezone);

	return $dt;

    }

    switch ($this->time_format) {

	case "U":

	    return new DateTime("@" . $db_time);

	default:

	    return new DateTime($db_time);

    }

 }

 function GetTimeSlicingFunction($db_time_var, $width, $offset = 0) {

    if ($offset) {

	if (is_object($offset)) 

	    $off = $this->ImportTime($offset);

	else

	    $off = $this->ImportUnixTime($offset);

	return "($db_time_var - $off) / $width";

    } 

    return "$db_time_var / $width";

 }

}

?>