706 lines
22 KiB
PHP
706 lines
22 KiB
PHP
<?php
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/**
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* Piwik - Open source web analytics
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*
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* @link http://piwik.org
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* @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
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*
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*/
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namespace Piwik;
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use Exception;
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/**
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* Utility class that wraps date/time related PHP functions. Using this class can
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* be easier than using `date`, `time`, `date_default_timezone_set`, etc.
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*
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* ### Performance concerns
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*
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* The helper methods in this class are instance methods and thus `Date` instances
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* need to be constructed before they can be used. The memory allocation can result
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* in noticeable performance degradation if you construct thousands of Date instances,
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* say, in a loop.
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*
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* ### Examples
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*
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* **Basic usage**
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*
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* $date = Date::factory('2007-07-24 14:04:24', 'EST');
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* $date->addHour(5);
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* echo $date->getLocalized("%longDay% the %day% of %longMonth% at %time%");
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*
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* @api
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*/
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class Date
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{
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/** Number of seconds in a day. */
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const NUM_SECONDS_IN_DAY = 86400;
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/** The default date time string format. */
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const DATE_TIME_FORMAT = 'Y-m-d H:i:s';
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/**
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* The stored timestamp is always UTC based.
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* The returned timestamp via getTimestamp() will have the conversion applied
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* @var int|null
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*/
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protected $timestamp = null;
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/**
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* Timezone the current date object is set to.
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* Timezone will only affect the returned timestamp via getTimestamp()
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* @var string
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*/
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protected $timezone = 'UTC';
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/**
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* Constructor.
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*
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* @param int $timestamp The number in seconds since the unix epoch.
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* @param string $timezone The timezone of the datetime.
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* @throws Exception If $timestamp is not an int.
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*/
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protected function __construct($timestamp, $timezone = 'UTC')
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{
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if (!is_int($timestamp)) {
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throw new Exception("Date is expecting a unix timestamp, got: '$timestamp'.");
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}
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$this->timezone = $timezone;
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$this->timestamp = $timestamp;
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}
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/**
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* Creates a new Date instance using a string datetime value. The timezone of the Date
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* result will be in UTC.
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*
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* @param string|int $dateString `'today'`, `'yesterday'`, `'now'`, `'yesterdaySameTime'`, a string with
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* `'YYYY-MM-DD HH:MM:SS'` format or a unix timestamp.
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* @param string $timezone The timezone of the result. If specified, `$dateString` will be converted
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* from UTC to this timezone before being used in the Date return value.
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* @throws Exception If `$dateString` is in an invalid format or if the time is before
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* Tue, 06 Aug 1991.
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* @return Date
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*/
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public static function factory($dateString, $timezone = null)
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{
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$invalidDateException = new Exception(Piwik::translate('General_ExceptionInvalidDateFormat', array("YYYY-MM-DD, or 'today' or 'yesterday'", "strtotime", "http://php.net/strtotime")) . ": $dateString");
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if ($dateString instanceof self) {
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$dateString = $dateString->toString();
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}
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if ($dateString == 'now') {
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$date = self::now();
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} elseif ($dateString == 'today') {
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$date = self::today();
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} elseif ($dateString == 'yesterday') {
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$date = self::yesterday();
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} elseif ($dateString == 'yesterdaySameTime') {
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$date = self::yesterdaySameTime();
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} elseif (!is_int($dateString)
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&& (
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// strtotime returns the timestamp for April 1st for a date like 2011-04-01,today
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// but we don't want this, as this is a date range and supposed to throw the exception
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strpos($dateString, ',') !== false
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||
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($dateString = strtotime($dateString)) === false
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)
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) {
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throw $invalidDateException;
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} else {
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$date = new Date($dateString);
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}
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$timestamp = $date->getTimestamp();
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// can't be doing web analytics before the 1st website
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// Tue, 06 Aug 1991 00:00:00 GMT
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if ($timestamp < 681436800) {
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throw $invalidDateException;
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}
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if (empty($timezone)) {
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return $date;
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}
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$timestamp = self::adjustForTimezone($timestamp, $timezone);
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return Date::factory($timestamp);
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}
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/**
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* Returns the current timestamp as a string with the following format: `'YYYY-MM-DD HH:MM:SS'`.
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*
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* @return string
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*/
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public function getDatetime()
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{
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return $this->toString(self::DATE_TIME_FORMAT);
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}
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/**
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* Returns the start of the day of the current timestamp in UTC. For example,
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* if the current timestamp is `'2007-07-24 14:04:24'` in UTC, the result will
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* be `'2007-07-24'`.
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*
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* @return string
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*/
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public function getDateStartUTC()
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{
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$dateStartUTC = gmdate('Y-m-d', $this->timestamp);
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$date = Date::factory($dateStartUTC)->setTimezone($this->timezone);
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return $date->toString(self::DATE_TIME_FORMAT);
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}
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/**
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* Returns the end of the day of the current timestamp in UTC. For example,
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* if the current timestamp is `'2007-07-24 14:03:24'` in UTC, the result will
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* be `'2007-07-24 23:59:59'`.
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*
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* @return string
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*/
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public function getDateEndUTC()
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{
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$dateEndUTC = gmdate('Y-m-d 23:59:59', $this->timestamp);
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$date = Date::factory($dateEndUTC)->setTimezone($this->timezone);
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return $date->toString(self::DATE_TIME_FORMAT);
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}
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/**
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* Returns a new date object with the same timestamp as `$this` but with a new
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* timezone.
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*
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* See {@link getTimestamp()} to see how the timezone is used.
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*
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* @param string $timezone eg, `'UTC'`, `'Europe/London'`, etc.
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* @return Date
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*/
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public function setTimezone($timezone)
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{
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return new Date($this->timestamp, $timezone);
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}
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/**
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* Helper function that returns the offset in the timezone string 'UTC+14'
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* Returns false if the timezone is not UTC+X or UTC-X
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*
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* @param string $timezone
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* @return int|bool utc offset or false
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*/
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protected static function extractUtcOffset($timezone)
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{
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if ($timezone == 'UTC') {
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return 0;
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}
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$start = substr($timezone, 0, 4);
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if ($start != 'UTC-'
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&& $start != 'UTC+'
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) {
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return false;
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}
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$offset = (float)substr($timezone, 4);
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if ($start == 'UTC-') {
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$offset = -$offset;
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}
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return $offset;
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}
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/**
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* Converts a timestamp in a from UTC to a timezone.
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*
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* @param int $timestamp The UNIX timestamp to adjust.
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* @param string $timezone The timezone to adjust to.
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* @return int The adjusted time as seconds from EPOCH.
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*/
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public static function adjustForTimezone($timestamp, $timezone)
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{
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// manually adjust for UTC timezones
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$utcOffset = self::extractUtcOffset($timezone);
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if ($utcOffset !== false) {
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return self::addHourTo($timestamp, $utcOffset);
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}
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date_default_timezone_set($timezone);
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$datetime = date(self::DATE_TIME_FORMAT, $timestamp);
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date_default_timezone_set('UTC');
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return strtotime($datetime);
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}
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/**
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* Returns the Unix timestamp of the date in UTC.
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*
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* @return int
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*/
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public function getTimestampUTC()
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{
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return $this->timestamp;
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}
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/**
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* Returns the unix timestamp of the date in UTC, converted from the current
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* timestamp timezone.
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*
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* @return int
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*/
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public function getTimestamp()
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{
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if (empty($this->timezone)) {
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$this->timezone = 'UTC';
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}
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$utcOffset = self::extractUtcOffset($this->timezone);
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if ($utcOffset !== false) {
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return (int)($this->timestamp - $utcOffset * 3600);
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}
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// The following code seems clunky - I thought the DateTime php class would allow to return timestamps
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// after applying the timezone offset. Instead, the underlying timestamp is not changed.
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// I decided to get the date without the timezone information, and create the timestamp from the truncated string.
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// Unit tests pass (@see Date.test.php) but I'm pretty sure this is not the right way to do it
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date_default_timezone_set($this->timezone);
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$dtzone = timezone_open('UTC');
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$time = date('r', $this->timestamp);
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$dtime = date_create($time);
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date_timezone_set($dtime, $dtzone);
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$dateWithTimezone = date_format($dtime, 'r');
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$dateWithoutTimezone = substr($dateWithTimezone, 0, -6);
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$timestamp = strtotime($dateWithoutTimezone);
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date_default_timezone_set('UTC');
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return (int)$timestamp;
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}
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/**
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* Returns `true` if the current date is older than the given `$date`.
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*
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* @param Date $date
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* @return bool
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*/
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public function isLater(Date $date)
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{
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return $this->getTimestamp() > $date->getTimestamp();
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}
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/**
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* Returns `true` if the current date is earlier than the given `$date`.
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*
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* @param Date $date
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* @return bool
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*/
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public function isEarlier(Date $date)
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{
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return $this->getTimestamp() < $date->getTimestamp();
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}
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/**
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* Returns `true` if the current year is a leap year, false otherwise.
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*
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* @return bool
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*/
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public function isLeapYear()
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{
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$currentYear = date('Y', $this->getTimestamp());
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return ($currentYear % 400) == 0 || (($currentYear % 4) == 0 && ($currentYear % 100) != 0);
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}
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/**
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* Converts this date to the requested string format. See {@link http://php.net/date}
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* for the list of format strings.
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*
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* @param string $format
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* @return string
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*/
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public function toString($format = 'Y-m-d')
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{
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return date($format, $this->getTimestamp());
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}
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/**
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* See {@link toString()}.
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*
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* @return string The current date in `'YYYY-MM-DD'` format.
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*/
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public function __toString()
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{
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return $this->toString();
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}
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/**
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* Performs three-way comparison of the week of the current date against the given `$date`'s week.
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*
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* @param \Piwik\Date $date
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* @return int Returns `0` if the current week is equal to `$date`'s, `-1` if the current week is
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* earlier or `1` if the current week is later.
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*/
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public function compareWeek(Date $date)
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{
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$currentWeek = date('W', $this->getTimestamp());
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$toCompareWeek = date('W', $date->getTimestamp());
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if ($currentWeek == $toCompareWeek) {
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return 0;
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}
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if ($currentWeek < $toCompareWeek) {
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return -1;
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}
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return 1;
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}
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/**
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* Performs three-way comparison of the month of the current date against the given `$date`'s month.
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*
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* @param \Piwik\Date $date Month to compare
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* @return int Returns `0` if the current month is equal to `$date`'s, `-1` if the current month is
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* earlier or `1` if the current month is later.
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*/
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public function compareMonth(Date $date)
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{
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$currentMonth = date('n', $this->getTimestamp());
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$toCompareMonth = date('n', $date->getTimestamp());
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if ($currentMonth == $toCompareMonth) {
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return 0;
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}
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if ($currentMonth < $toCompareMonth) {
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return -1;
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}
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return 1;
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}
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/**
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* Performs three-way comparison of the month of the current date against the given `$date`'s year.
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*
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* @param \Piwik\Date $date Year to compare
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* @return int Returns `0` if the current year is equal to `$date`'s, `-1` if the current year is
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* earlier or `1` if the current year is later.
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*/
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public function compareYear(Date $date)
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{
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$currentYear = date('Y', $this->getTimestamp());
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$toCompareYear = date('Y', $date->getTimestamp());
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if ($currentYear == $toCompareYear) {
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return 0;
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}
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if ($currentYear < $toCompareYear) {
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return -1;
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}
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return 1;
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}
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/**
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* Returns `true` if current date is today.
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*
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* @return bool
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*/
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public function isToday()
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{
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return $this->toString('Y-m-d') === Date::factory('today', $this->timezone)->toString('Y-m-d');
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}
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/**
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* Returns a date object set to now in UTC (same as {@link today()}, except that the time is also set).
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*
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* @return \Piwik\Date
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*/
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public static function now()
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{
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return new Date(time());
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}
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/**
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* Returns a date object set to today at midnight in UTC.
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*
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* @return \Piwik\Date
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*/
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public static function today()
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{
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return new Date(strtotime(date("Y-m-d 00:00:00")));
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}
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/**
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* Returns a date object set to yesterday at midnight in UTC.
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*
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* @return \Piwik\Date
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*/
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public static function yesterday()
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{
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return new Date(strtotime("yesterday"));
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}
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/**
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* Returns a date object set to yesterday with the current time of day in UTC.
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*
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* @return \Piwik\Date
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*/
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public static function yesterdaySameTime()
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{
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return new Date(strtotime("yesterday " . date('H:i:s')));
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}
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/**
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* Returns a new Date instance with `$this` date's day and the specified new
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* time of day.
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*
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* @param string $time String in the `'HH:MM:SS'` format.
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* @return \Piwik\Date The new date with the time of day changed.
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*/
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public function setTime($time)
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{
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return new Date(strtotime(date("Y-m-d", $this->timestamp) . " $time"), $this->timezone);
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}
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/**
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* Returns a new Date instance with `$this` date's time of day and the day specified
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* by `$day`.
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*
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* @param int $day The day eg. `31`.
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* @return \Piwik\Date
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*/
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public function setDay($day)
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{
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$ts = $this->timestamp;
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$result = mktime(
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date('H', $ts),
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date('i', $ts),
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date('s', $ts),
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date('n', $ts),
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$day,
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date('Y', $ts)
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);
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return new Date($result, $this->timezone);
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}
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/**
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* Returns a new Date instance with `$this` date's time of day, month and day, but with
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* a new year (specified by `$year`).
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*
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* @param int $year The year, eg. `2010`.
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* @return \Piwik\Date
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*/
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public function setYear($year)
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{
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$ts = $this->timestamp;
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$result = mktime(
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date('H', $ts),
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date('i', $ts),
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date('s', $ts),
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date('n', $ts),
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date('j', $ts),
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$year
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);
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return new Date($result, $this->timezone);
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}
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/**
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* Subtracts `$n` number of days from `$this` date and returns a new Date object.
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*
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* @param int $n An integer > 0.
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* @return \Piwik\Date
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*/
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public function subDay($n)
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{
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if ($n === 0) {
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return clone $this;
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}
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$ts = strtotime("-$n day", $this->timestamp);
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return new Date($ts, $this->timezone);
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}
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/**
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* Subtracts `$n` weeks from `$this` date and returns a new Date object.
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*
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* @param int $n An integer > 0.
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* @return \Piwik\Date
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*/
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public function subWeek($n)
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{
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return $this->subDay(7 * $n);
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}
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/**
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* Subtracts `$n` months from `$this` date and returns the result as a new Date object.
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*
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* @param int $n An integer > 0.
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* @return \Piwik\Date new date
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*/
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public function subMonth($n)
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{
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if ($n === 0) {
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return clone $this;
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}
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$ts = $this->timestamp;
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$result = mktime(
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date('H', $ts),
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date('i', $ts),
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date('s', $ts),
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date('n', $ts) - $n,
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1, // we set the day to 1
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date('Y', $ts)
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);
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return new Date($result, $this->timezone);
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}
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/**
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* Subtracts `$n` years from `$this` date and returns the result as a new Date object.
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*
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* @param int $n An integer > 0.
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* @return \Piwik\Date
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*/
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public function subYear($n)
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{
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if ($n === 0) {
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return clone $this;
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}
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$ts = $this->timestamp;
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$result = mktime(
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date('H', $ts),
|
|
date('i', $ts),
|
|
date('s', $ts),
|
|
1, // we set the month to 1
|
|
1, // we set the day to 1
|
|
date('Y', $ts) - $n
|
|
);
|
|
return new Date($result, $this->timezone);
|
|
}
|
|
|
|
/**
|
|
* Returns a localized date string using the given template.
|
|
* The template should contain tags that will be replaced with localized date strings.
|
|
*
|
|
* Allowed tags include:
|
|
*
|
|
* - **%day%**: replaced with the day of the month without leading zeros, eg, **1** or **20**.
|
|
* - **%shortMonth%**: the short month in the current language, eg, **Jan**, **Feb**.
|
|
* - **%longMonth%**: the whole month name in the current language, eg, **January**, **February**.
|
|
* - **%shortDay%**: the short day name in the current language, eg, **Mon**, **Tue**.
|
|
* - **%longDay%**: the long day name in the current language, eg, **Monday**, **Tuesday**.
|
|
* - **%longYear%**: the four digit year, eg, **2007**, **2013**.
|
|
* - **%shortYear%**: the two digit year, eg, **07**, **13**.
|
|
* - **%time%**: the time of day, eg, **07:35:00**, or **15:45:00**.
|
|
*
|
|
* @param string $template eg. `"%shortMonth% %longYear%"`
|
|
* @return string eg. `"Aug 2009"`
|
|
*/
|
|
public function getLocalized($template)
|
|
{
|
|
$day = $this->toString('j');
|
|
$dayOfWeek = $this->toString('N');
|
|
$monthOfYear = $this->toString('n');
|
|
$patternToValue = array(
|
|
"%day%" => $day,
|
|
"%shortMonth%" => Piwik::translate('General_ShortMonth_' . $monthOfYear),
|
|
"%longMonth%" => Piwik::translate('General_LongMonth_' . $monthOfYear),
|
|
"%shortDay%" => Piwik::translate('General_ShortDay_' . $dayOfWeek),
|
|
"%longDay%" => Piwik::translate('General_LongDay_' . $dayOfWeek),
|
|
"%longYear%" => $this->toString('Y'),
|
|
"%shortYear%" => $this->toString('y'),
|
|
"%time%" => $this->toString('H:i:s')
|
|
);
|
|
$out = str_replace(array_keys($patternToValue), array_values($patternToValue), $template);
|
|
return $out;
|
|
}
|
|
|
|
/**
|
|
* Adds `$n` days to `$this` date and returns the result in a new Date.
|
|
* instance.
|
|
*
|
|
* @param int $n Number of days to add, must be > 0.
|
|
* @return \Piwik\Date
|
|
*/
|
|
public function addDay($n)
|
|
{
|
|
$ts = strtotime("+$n day", $this->timestamp);
|
|
return new Date($ts, $this->timezone);
|
|
}
|
|
|
|
/**
|
|
* Adds `$n` hours to `$this` date and returns the result in a new Date.
|
|
*
|
|
* @param int $n Number of hours to add. Can be less than 0.
|
|
* @return \Piwik\Date
|
|
*/
|
|
public function addHour($n)
|
|
{
|
|
$ts = self::addHourTo($this->timestamp, $n);
|
|
return new Date($ts, $this->timezone);
|
|
}
|
|
|
|
/**
|
|
* Adds N number of hours to a UNIX timestamp and returns the result. Using
|
|
* this static function instead of {@link addHour()} will be faster since a
|
|
* Date instance does not have to be created.
|
|
*
|
|
* @param int $timestamp The timestamp to add to.
|
|
* @param number $n Number of hours to add, must be > 0.
|
|
* @return int The result as a UNIX timestamp.
|
|
*/
|
|
public static function addHourTo($timestamp, $n)
|
|
{
|
|
$isNegative = ($n < 0);
|
|
$minutes = 0;
|
|
if ($n != round($n)) {
|
|
if ($n >= 1 || $n <= -1) {
|
|
$extraMinutes = floor(abs($n));
|
|
if ($isNegative) {
|
|
$extraMinutes = -$extraMinutes;
|
|
}
|
|
$minutes = abs($n - $extraMinutes) * 60;
|
|
if ($isNegative) {
|
|
$minutes *= -1;
|
|
}
|
|
} else {
|
|
$minutes = $n * 60;
|
|
}
|
|
$n = floor(abs($n));
|
|
if ($isNegative) {
|
|
$n *= -1;
|
|
}
|
|
}
|
|
return (int)($timestamp + round($minutes * 60) + $n * 3600);
|
|
}
|
|
|
|
/**
|
|
* Subtracts `$n` hours from `$this` date and returns the result in a new Date.
|
|
*
|
|
* @param int $n Number of hours to subtract. Can be less than 0.
|
|
* @return \Piwik\Date
|
|
*/
|
|
public function subHour($n)
|
|
{
|
|
return $this->addHour(-$n);
|
|
}
|
|
|
|
/**
|
|
* Adds a period to `$this` date and returns the result in a new Date instance.
|
|
*
|
|
* @param int $n The number of periods to add. Can be negative.
|
|
* @param string $period The type of period to add (YEAR, MONTH, WEEK, DAY, ...)
|
|
* @return \Piwik\Date
|
|
*/
|
|
public function addPeriod($n, $period)
|
|
{
|
|
if ($n < 0) {
|
|
$ts = strtotime("$n $period", $this->timestamp);
|
|
} else {
|
|
$ts = strtotime("+$n $period", $this->timestamp);
|
|
}
|
|
return new Date($ts, $this->timezone);
|
|
}
|
|
|
|
/**
|
|
* Subtracts a period from `$this` date and returns the result in a new Date instance.
|
|
*
|
|
* @param int $n The number of periods to add. Can be negative.
|
|
* @param string $period The type of period to add (YEAR, MONTH, WEEK, DAY, ...)
|
|
* @return \Piwik\Date
|
|
*/
|
|
public function subPeriod($n, $period)
|
|
{
|
|
return $this->addPeriod(-$n, $period);
|
|
}
|
|
|
|
/**
|
|
* Returns the number of days represented by a number of seconds.
|
|
*
|
|
* @param int $secs
|
|
* @return float
|
|
*/
|
|
public static function secondsToDays($secs)
|
|
{
|
|
return $secs / self::NUM_SECONDS_IN_DAY;
|
|
}
|
|
}
|