<?php
class Application_Model_DateHelper
{
private $_dateTime;
function __construct()
{
$this->_dateTime = date("U");
}
/**
* Get time of object construction in the format
* YYYY-MM-DD HH:mm:ss
*/
function getTimestamp()
{
return date("Y-m-d H:i:s", $this->_dateTime);
}
/**
* Get time of object construction in the format
* YYYY-MM-DD HH:mm:ss
*/
function getUtcTimestamp()
{
return gmdate("Y-m-d H:i:s", $this->_dateTime);
}
/**
* Get date of object construction in the format
* YYYY-MM-DD
*/
function getDate()
{
return gmdate("Y-m-d", $this->_dateTime);
}
/**
* Get time of object construction in the format
* HH:mm:ss
*/
function getTime()
{
return gmdate("H:i:s", $this->_dateTime);
}
/**
* Get the week start date of this week in the format
* YYYY-MM-DD
*
* @return String - week start date
*/
function getWeekStartDate()
{
$startDate = date('w') == 0 ? date('Y-m-d') : date('Y-m-d', strtotime('last sunday'));
$startDateTime = new DateTime($startDate);
return $startDateTime->format('Y-m-d H:i:s');
}
/**
* Set the internal timestamp of the object.
*/
function setDate($dateString)
{
$dateTime = new DateTime($dateString, new DateTimeZone("UTC"));
$this->_dateTime = $dateTime->getTimestamp();
}
/**
* Calculate and return the timestamp for end of day today
* in local time.
*
* For example, if local time is 2PM on 2011-11-01,
* then the function would return 2011-11-02 00:00:00
*
* @return End of day timestamp in local timezone
*/
public static function GetDayEndTimestamp($time = "") {
$dateTime = $time == "" ? new DateTime(date("Y-m-d")) : new DateTime($time);
$dateTime->add(new DateInterval('P1D'));
return $dateTime->format('Y-m-d H:i:s');
}
public static function GetDayEndTimestampInUtc($time = "") {
$dayEndTimestamp = Application_Model_DateHelper::GetDayEndTimestamp($time);
return Application_Model_DateHelper::ConvertToUtcDateTimeString($dayEndTimestamp);
}
/**
* Find the epoch timestamp difference from "now" to the beginning of today.
*/
function getNowDayStartDiff()
{
$dayStartTs = ((int)($this->_dateTime/86400))*86400;
return $this->_dateTime - $dayStartTs;
}
/**
* Find the epoch timestamp difference from "now" to the end of today.
*/
function getNowDayEndDiff()
{
$dayEndTs = ((int)(($this->_dateTime+86400)/86400))*86400;
return $dayEndTs - $this->_dateTime;
}
function getEpochTime()
{
return $this->_dateTime;
}
/**
* Returns the offset in seconds, between local and UTC timezones.
* E.g., if local timezone is -4, this function
* returns -14400.
*
* @return type offset in int, between local and UTC timezones
*/
function getLocalTimeZoneOffset() {
$dateTime = new DateTime("@".$this->_dateTime, new DateTimeZone("UTC"));
$timezone = new DateTimeZone(date_default_timezone_get());
return $timezone->getOffset($dateTime);
}
/**
* Returns the offset hour in int, between local and UTC timezones.
* E.g., if local timezone is -4:30, this function
* returns -4.
*
* @return type offset hour in int, between local and UTC timezones
*/
function getLocalOffsetHour() {
$offset = $this->getLocalTimeZoneOffset();
return (int)($offset / 3600);
}
/**
* Returns the offset minute in int, between local and UTC timezones.
* E.g., if local timezone is -4:30, this function
* returns -30.
*
* @return type offset minute in int, between local and UTC timezones
*/
function getLocalOffsetMinute() {
$offset = $this->getLocalTimeZoneOffset();
return (int)(($offset % 3600) / 60);
}
public static function TimeDiff($time1, $time2)
{
return strtotime($time2) - strtotime($time1);
}
public static function ConvertMSToHHMMSSmm($time)
{
$hours = floor($time / 3600000);
$time -= 3600000*$hours;
$minutes = floor($time / 60000);
$time -= 60000*$minutes;
$seconds = floor($time / 1000);
$time -= 1000*$seconds;
$ms = $time;
if (strlen($hours) == 1)
$hours = "0".$hours;
if (strlen($minutes) == 1)
$minutes = "0".$minutes;
if (strlen($seconds) == 1)
$seconds = "0".$seconds;
return $hours.":".$minutes.":".$seconds.".".$ms;
}
/**
* This function formats a time by removing seconds
*
* When we receive a time from the database we get the
* format "hh:mm:ss". But when dealing with show times, we
* do not care about the seconds.
*
* @param int $p_dateTime
* The value which to format.
* @return int
* The timestamp with the new format "hh:mm", or
* the original input parameter, if it does not have
* the correct format.
*/
public static function removeSecondsFromTime($p_dateTime)
{
//Format is in hh:mm:ss. We want hh:mm
$timeExplode = explode(":", $p_dateTime);
if (count($timeExplode) == 3)
return $timeExplode[0].":".$timeExplode[1];
else
return $p_dateTime;
}
public static function getDateFromTimestamp($p_dateTime){
$explode = explode(" ", $p_dateTime);
return $explode[0];
}
public static function getTimeFromTimestamp($p_dateTime){
$explode = explode(" ", $p_dateTime);
return $explode[1];
}
/* Given a track length in the format HH:MM:SS.mm, we want to
* convert this to seconds. This is useful for Liquidsoap which
* likes input parameters give in seconds.
* For example, 00:06:31.444, should be converted to 391.444 seconds
* @param int $p_time
* The time interval in format HH:MM:SS.mm we wish to
* convert to seconds.
* @return float
* The input parameter converted to seconds.
*/
public static function calculateLengthInSeconds($p_time){
if (2 !== substr_count($p_time, ":")){
return FALSE;
}
if (1 === substr_count($p_time, ".")){
list($hhmmss, $ms) = explode(".", $p_time);
} else {
$hhmmss = $p_time;
$ms = 0;
}
list($hours, $minutes, $seconds) = explode(":", $hhmmss);
// keep ms in 3 digits
$ms = substr($ms, 0, 3);
$totalSeconds = $hours*3600 + $minutes*60 + $seconds + $ms/1000;
return $totalSeconds;
}
public static function ConvertToUtcDateTime($p_dateString, $timezone=null){
if (isset($timezone)) {
$dateTime = new DateTime($p_dateString, new DateTimeZone($timezone));
}
else {
$dateTime = new DateTime($p_dateString, new DateTimeZone(date_default_timezone_get()));
}
$dateTime->setTimezone(new DateTimeZone("UTC"));
return $dateTime;
}
public static function ConvertToSpecificTimezoneDateTime($p_dateString, $timezone){
$dateTime = new DateTime($p_dateString, new DateTimeZone("UTC"));
$dateTime->setTimezone(new DateTimeZone($timezone));
return $dateTime;
}
public static function ConvertToLocalDateTime($p_dateString){
$dateTime = new DateTime($p_dateString, new DateTimeZone("UTC"));
$dateTime->setTimezone(new DateTimeZone(date_default_timezone_get()));
return $dateTime;
}
/* Convenience method to return a date formatted into a String rather than a
* DateTime object. Note that if an empty string is provided for $p_dateString
* then the current time is provided.
*
* @param $p_dateString
* Date string in UTC timezone.
* @param $p_format
* Format which the string should be returned in.
*
* @return string
* Date String in localtime
* */
public static function ConvertToLocalDateTimeString($p_dateString, $p_format="Y-m-d H:i:s"){
if (is_null($p_dateString) || strlen($p_dateString) == 0)
return $p_dateString;
return self::ConvertToLocalDateTime($p_dateString)->format($p_format);
}
public static function ConvertToUtcDateTimeString($p_dateString, $p_format="Y-m-d H:i:s"){
if (is_null($p_dateString) || strlen($p_dateString) == 0)
return $p_dateString;
return self::ConvertToUtcDateTime($p_dateString)->format($p_format);
}
}