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Diffstat (limited to 'libcalendaring/lib/Horde_Date.php')
| -rw-r--r-- | libcalendaring/lib/Horde_Date.php | 1304 |
1 files changed, 1304 insertions, 0 deletions
diff --git a/libcalendaring/lib/Horde_Date.php b/libcalendaring/lib/Horde_Date.php new file mode 100644 index 0000000..9197f84 --- /dev/null +++ b/libcalendaring/lib/Horde_Date.php @@ -0,0 +1,1304 @@ +<?php + +/** + * This is a concatenated copy of the following files: + * Horde/Date/Utils.php, Horde/Date/Recurrence.php + * Pull the latest version of these files from the PEAR channel of the Horde + * project at http://pear.horde.org by installing the Horde_Date package. + */ + + +/** + * Horde Date wrapper/logic class, including some calculation + * functions. + * + * @category Horde + * @package Date + * + * @TODO in format(): + * http://php.net/intldateformatter + * + * @TODO on timezones: + * http://trac.agavi.org/ticket/1008 + * http://trac.agavi.org/changeset/3659 + * + * @TODO on switching to PHP::DateTime: + * The only thing ever stored in the database *IS* Unix timestamps. Doing + * anything other than that is unmanageable, yet some frameworks use 'server + * based' times in their systems, simply because they do not bother with + * daylight saving and only 'serve' one timezone! + * + * The second you have to manage 'real' time across timezones then daylight + * saving becomes essential, BUT only on the display side! Since the browser + * only provides a time offset, this is useless and to be honest should simply + * be ignored ( until it is upgraded to provide the correct information ;) + * ). So we need a 'display' function that takes a simple numeric epoch, and a + * separate timezone id into which the epoch is to be 'converted'. My W3C + * mapping works simply because ADOdb then converts that to it's own simple + * offset abbreviation - in my case GMT or BST. As long as DateTime passes the + * full 64 bit number the date range from 100AD is also preserved ( and + * further back if 2 digit years are disabled ). If I want to display the + * 'real' timezone with this 'time' then I just add it in place of ADOdb's + * 'timezone'. I am tempted to simply adjust the ADOdb class to take a + * timezone in place of the simple GMT switch it currently uses. + * + * The return path is just the reverse and simply needs to take the client + * display offset off prior to storage of the UTC epoch. SO we use + * DateTimeZone to get an offset value for the clients timezone and simply add + * or subtract this from a timezone agnostic display on the client end when + * entering new times. + * + * + * It's not really feasible to store dates in specific timezone, as most + * national/local timezones support DST - and that is a pain to support, as + * eg. sorting breaks when some timestamps get repeated. That's why it's + * usually better to store datetimes as either UTC datetime or plain unix + * timestamp. I usually go with the former - using database datetime type. + */ + +/** + * @category Horde + * @package Date + */ +class Horde_Date +{ + const DATE_SUNDAY = 0; + const DATE_MONDAY = 1; + const DATE_TUESDAY = 2; + const DATE_WEDNESDAY = 3; + const DATE_THURSDAY = 4; + const DATE_FRIDAY = 5; + const DATE_SATURDAY = 6; + + const MASK_SUNDAY = 1; + const MASK_MONDAY = 2; + const MASK_TUESDAY = 4; + const MASK_WEDNESDAY = 8; + const MASK_THURSDAY = 16; + const MASK_FRIDAY = 32; + const MASK_SATURDAY = 64; + const MASK_WEEKDAYS = 62; + const MASK_WEEKEND = 65; + const MASK_ALLDAYS = 127; + + const MASK_SECOND = 1; + const MASK_MINUTE = 2; + const MASK_HOUR = 4; + const MASK_DAY = 8; + const MASK_MONTH = 16; + const MASK_YEAR = 32; + const MASK_ALLPARTS = 63; + + const DATE_DEFAULT = 'Y-m-d H:i:s'; + const DATE_JSON = 'Y-m-d\TH:i:s'; + + /** + * Year + * + * @var integer + */ + protected $_year; + + /** + * Month + * + * @var integer + */ + protected $_month; + + /** + * Day + * + * @var integer + */ + protected $_mday; + + /** + * Hour + * + * @var integer + */ + protected $_hour = 0; + + /** + * Minute + * + * @var integer + */ + protected $_min = 0; + + /** + * Second + * + * @var integer + */ + protected $_sec = 0; + + /** + * String representation of the date's timezone. + * + * @var string + */ + protected $_timezone; + + /** + * Default format for __toString() + * + * @var string + */ + protected $_defaultFormat = self::DATE_DEFAULT; + + /** + * Default specs that are always supported. + * @var string + */ + protected static $_defaultSpecs = '%CdDeHImMnRStTyY'; + + /** + * Internally supported strftime() specifiers. + * @var string + */ + protected static $_supportedSpecs = ''; + + /** + * Map of required correction masks. + * + * @see __set() + * + * @var array + */ + protected static $_corrections = array( + 'year' => self::MASK_YEAR, + 'month' => self::MASK_MONTH, + 'mday' => self::MASK_DAY, + 'hour' => self::MASK_HOUR, + 'min' => self::MASK_MINUTE, + 'sec' => self::MASK_SECOND, + ); + + protected $_formatCache = array(); + + /** + * Builds a new date object. If $date contains date parts, use them to + * initialize the object. + * + * Recognized formats: + * - arrays with keys 'year', 'month', 'mday', 'day' + * 'hour', 'min', 'minute', 'sec' + * - objects with properties 'year', 'month', 'mday', 'hour', 'min', 'sec' + * - yyyy-mm-dd hh:mm:ss + * - yyyymmddhhmmss + * - yyyymmddThhmmssZ + * - yyyymmdd (might conflict with unix timestamps between 31 Oct 1966 and + * 03 Mar 1973) + * - unix timestamps + * - anything parsed by strtotime()/DateTime. + * + * @throws Horde_Date_Exception + */ + public function __construct($date = null, $timezone = null) + { + if (!self::$_supportedSpecs) { + self::$_supportedSpecs = self::$_defaultSpecs; + if (function_exists('nl_langinfo')) { + self::$_supportedSpecs .= 'bBpxX'; + } + } + + if (func_num_args() > 2) { + // Handle args in order: year month day hour min sec tz + $this->_initializeFromArgs(func_get_args()); + return; + } + + $this->_initializeTimezone($timezone); + + if (is_null($date)) { + return; + } + + if (is_string($date)) { + $date = trim($date, '"'); + } + + if (is_object($date)) { + $this->_initializeFromObject($date); + } elseif (is_array($date)) { + $this->_initializeFromArray($date); + } elseif (preg_match('/^(\d{4})-?(\d{2})-?(\d{2})T? ?(\d{2}):?(\d{2}):?(\d{2})(?:\.\d+)?(Z?)$/', $date, $parts)) { + $this->_year = (int)$parts[1]; + $this->_month = (int)$parts[2]; + $this->_mday = (int)$parts[3]; + $this->_hour = (int)$parts[4]; + $this->_min = (int)$parts[5]; + $this->_sec = (int)$parts[6]; + if ($parts[7]) { + $this->_initializeTimezone('UTC'); + } + } elseif (preg_match('/^(\d{4})-?(\d{2})-?(\d{2})$/', $date, $parts) && + $parts[2] > 0 && $parts[2] <= 12 && + $parts[3] > 0 && $parts[3] <= 31) { + $this->_year = (int)$parts[1]; + $this->_month = (int)$parts[2]; + $this->_mday = (int)$parts[3]; + $this->_hour = $this->_min = $this->_sec = 0; + } elseif ((string)(int)$date == $date) { + // Try as a timestamp. + $parts = @getdate($date); + if ($parts) { + $this->_year = $parts['year']; + $this->_month = $parts['mon']; + $this->_mday = $parts['mday']; + $this->_hour = $parts['hours']; + $this->_min = $parts['minutes']; + $this->_sec = $parts['seconds']; + } + } else { + // Use date_create() so we can catch errors with PHP 5.2. Use + // "new DateTime() once we require 5.3. + $parsed = date_create($date); + if (!$parsed) { + throw new Horde_Date_Exception(sprintf(Horde_Date_Translation::t("Failed to parse time string (%s)"), $date)); + } + $parsed->setTimezone(new DateTimeZone(date_default_timezone_get())); + $this->_year = (int)$parsed->format('Y'); + $this->_month = (int)$parsed->format('m'); + $this->_mday = (int)$parsed->format('d'); + $this->_hour = (int)$parsed->format('H'); + $this->_min = (int)$parsed->format('i'); + $this->_sec = (int)$parsed->format('s'); + $this->_initializeTimezone(date_default_timezone_get()); + } + } + + /** + * Returns a simple string representation of the date object + * + * @return string This object converted to a string. + */ + public function __toString() + { + try { + return $this->format($this->_defaultFormat); + } catch (Exception $e) { + return ''; + } + } + + /** + * Returns a DateTime object representing this object. + * + * @return DateTime + */ + public function toDateTime() + { + $date = new DateTime(null, new DateTimeZone($this->_timezone)); + $date->setDate($this->_year, $this->_month, $this->_mday); + $date->setTime($this->_hour, $this->_min, $this->_sec); + return $date; + } + + /** + * Converts a date in the proleptic Gregorian calendar to the no of days + * since 24th November, 4714 B.C. + * + * Returns the no of days since Monday, 24th November, 4714 B.C. in the + * proleptic Gregorian calendar (which is 24th November, -4713 using + * 'Astronomical' year numbering, and 1st January, 4713 B.C. in the + * proleptic Julian calendar). This is also the first day of the 'Julian + * Period' proposed by Joseph Scaliger in 1583, and the number of days + * since this date is known as the 'Julian Day'. (It is not directly + * to do with the Julian calendar, although this is where the name + * is derived from.) + * + * The algorithm is valid for all years (positive and negative), and + * also for years preceding 4714 B.C. + * + * Algorithm is from PEAR::Date_Calc + * + * @author Monte Ohrt <monte@ispi.net> + * @author Pierre-Alain Joye <pajoye@php.net> + * @author Daniel Convissor <danielc@php.net> + * @author C.A. Woodcock <c01234@netcomuk.co.uk> + * + * @return integer The number of days since 24th November, 4714 B.C. + */ + public function toDays() + { + if (function_exists('GregorianToJD')) { + return gregoriantojd($this->_month, $this->_mday, $this->_year); + } + + $day = $this->_mday; + $month = $this->_month; + $year = $this->_year; + + if ($month > 2) { + // March = 0, April = 1, ..., December = 9, + // January = 10, February = 11 + $month -= 3; + } else { + $month += 9; + --$year; + } + + $hb_negativeyear = $year < 0; + $century = intval($year / 100); + $year = $year % 100; + + if ($hb_negativeyear) { + // Subtract 1 because year 0 is a leap year; + // And N.B. that we must treat the leap years as occurring + // one year earlier than they do, because for the purposes + // of calculation, the year starts on 1st March: + // + return intval((14609700 * $century + ($year == 0 ? 1 : 0)) / 400) + + intval((1461 * $year + 1) / 4) + + intval((153 * $month + 2) / 5) + + $day + 1721118; + } else { + return intval(146097 * $century / 4) + + intval(1461 * $year / 4) + + intval((153 * $month + 2) / 5) + + $day + 1721119; + } + } + + /** + * Converts number of days since 24th November, 4714 B.C. (in the proleptic + * Gregorian calendar, which is year -4713 using 'Astronomical' year + * numbering) to Gregorian calendar date. + * + * Returned date belongs to the proleptic Gregorian calendar, using + * 'Astronomical' year numbering. + * + * The algorithm is valid for all years (positive and negative), and + * also for years preceding 4714 B.C. (i.e. for negative 'Julian Days'), + * and so the only limitation is platform-dependent (for 32-bit systems + * the maximum year would be something like about 1,465,190 A.D.). + * + * N.B. Monday, 24th November, 4714 B.C. is Julian Day '0'. + * + * Algorithm is from PEAR::Date_Calc + * + * @author Monte Ohrt <monte@ispi.net> + * @author Pierre-Alain Joye <pajoye@php.net> + * @author Daniel Convissor <danielc@php.net> + * @author C.A. Woodcock <c01234@netcomuk.co.uk> + * + * @param int $days the number of days since 24th November, 4714 B.C. + * @param string $format the string indicating how to format the output + * + * @return Horde_Date A Horde_Date object representing the date. + */ + public static function fromDays($days) + { + if (function_exists('JDToGregorian')) { + list($month, $day, $year) = explode('/', JDToGregorian($days)); + } else { + $days = intval($days); + + $days -= 1721119; + $century = floor((4 * $days - 1) / 146097); + $days = floor(4 * $days - 1 - 146097 * $century); + $day = floor($days / 4); + + $year = floor((4 * $day + 3) / 1461); + $day = floor(4 * $day + 3 - 1461 * $year); + $day = floor(($day + 4) / 4); + + $month = floor((5 * $day - 3) / 153); + $day = floor(5 * $day - 3 - 153 * $month); + $day = floor(($day + 5) / 5); + + $year = $century * 100 + $year; + if ($month < 10) { + $month +=3; + } else { + $month -=9; + ++$year; + } + } + + return new Horde_Date($year, $month, $day); + } + + /** + * Getter for the date and time properties. + * + * @param string $name One of 'year', 'month', 'mday', 'hour', 'min' or + * 'sec'. + * + * @return integer The property value, or null if not set. + */ + public function __get($name) + { + if ($name == 'day') { + $name = 'mday'; + } + + return $this->{'_' . $name}; + } + + /** + * Setter for the date and time properties. + * + * @param string $name One of 'year', 'month', 'mday', 'hour', 'min' or + * 'sec'. + * @param integer $value The property value. + */ + public function __set($name, $value) + { + if ($name == 'timezone') { + $this->_initializeTimezone($value); + return; + } + if ($name == 'day') { + $name = 'mday'; + } + + if ($name != 'year' && $name != 'month' && $name != 'mday' && + $name != 'hour' && $name != 'min' && $name != 'sec') { + throw new InvalidArgumentException('Undefined property ' . $name); + } + + $down = $value < $this->{'_' . $name}; + $this->{'_' . $name} = $value; + $this->_correct(self::$_corrections[$name], $down); + $this->_formatCache = array(); + } + + /** + * Returns whether a date or time property exists. + * + * @param string $name One of 'year', 'month', 'mday', 'hour', 'min' or + * 'sec'. + * + * @return boolen True if the property exists and is set. + */ + public function __isset($name) + { + if ($name == 'day') { + $name = 'mday'; + } + return ($name == 'year' || $name == 'month' || $name == 'mday' || + $name == 'hour' || $name == 'min' || $name == 'sec') && + isset($this->{'_' . $name}); + } + + /** + * Adds a number of seconds or units to this date, returning a new Date + * object. + */ + public function add($factor) + { + $d = clone($this); + if (is_array($factor) || is_object($factor)) { + foreach ($factor as $property => $value) { + $d->$property += $value; + } + } else { + $d->sec += $factor; + } + + return $d; + } + + /** + * Subtracts a number of seconds or units from this date, returning a new + * Horde_Date object. + */ + public function sub($factor) + { + if (is_array($factor)) { + foreach ($factor as &$value) { + $value *= -1; + } + } else { + $factor *= -1; + } + + return $this->add($factor); + } + + /** + * Converts this object to a different timezone. + * + * @param string $timezone The new timezone. + * + * @return Horde_Date This object. + */ + public function setTimezone($timezone) + { + $date = $this->toDateTime(); + $date->setTimezone(new DateTimeZone($timezone)); + $this->_timezone = $timezone; + $this->_year = (int)$date->format('Y'); + $this->_month = (int)$date->format('m'); + $this->_mday = (int)$date->format('d'); + $this->_hour = (int)$date->format('H'); + $this->_min = (int)$date->format('i'); + $this->_sec = (int)$date->format('s'); + $this->_formatCache = array(); + return $this; + } + + /** + * Sets the default date format used in __toString() + * + * @param string $format + */ + public function setDefaultFormat($format) + { + $this->_defaultFormat = $format; + } + + /** + * Returns the day of the week (0 = Sunday, 6 = Saturday) of this date. + * + * @return integer The day of the week. + */ + public function dayOfWeek() + { + if ($this->_month > 2) { + $month = $this->_month - 2; + $year = $this->_year; + } else { + $month = $this->_month + 10; + $year = $this->_year - 1; + } + + $day = (floor((13 * $month - 1) / 5) + + $this->_mday + ($year % 100) + + floor(($year % 100) / 4) + + floor(($year / 100) / 4) - 2 * + floor($year / 100) + 77); + + return (int)($day - 7 * floor($day / 7)); + } + + /** + * Returns the day number of the year (1 to 365/366). + * + * @return integer The day of the year. + */ + public function dayOfYear() + { + return $this->format('z') + 1; + } + + /** + * Returns the week of the month. + * + * @return integer The week number. + */ + public function weekOfMonth() + { + return ceil($this->_mday / 7); + } + + /** + * Returns the week of the year, first Monday is first day of first week. + * + * @return integer The week number. + */ + public function weekOfYear() + { + return $this->format('W'); + } + + /** + * Returns the number of weeks in the given year (52 or 53). + * + * @param integer $year The year to count the number of weeks in. + * + * @return integer $numWeeks The number of weeks in $year. + */ + public static function weeksInYear($year) + { + // Find the last Thursday of the year. + $date = new Horde_Date($year . '-12-31'); + while ($date->dayOfWeek() != self::DATE_THURSDAY) { + --$date->mday; + } + return $date->weekOfYear(); + } + + /** + * Sets the date of this object to the $nth weekday of $weekday. + * + * @param integer $weekday The day of the week (0 = Sunday, etc). + * @param integer $nth The $nth $weekday to set to (defaults to 1). + */ + public function setNthWeekday($weekday, $nth = 1) + { + if ($weekday < self::DATE_SUNDAY || $weekday > self::DATE_SATURDAY) { + return; + } + + if ($nth < 0) { // last $weekday of month + $this->_mday = $lastday = Horde_Date_Utils::daysInMonth($this->_month, $this->_year); + $last = $this->dayOfWeek(); + $this->_mday += ($weekday - $last); + if ($this->_mday > $lastday) + $this->_mday -= 7; + } + else { + $this->_mday = 1; + $first = $this->dayOfWeek(); + if ($weekday < $first) { + $this->_mday = 8 + $weekday - $first; + } else { + $this->_mday = $weekday - $first + 1; + } + $diff = 7 * $nth - 7; + $this->_mday += $diff; + $this->_correct(self::MASK_DAY, $diff < 0); + } + } + + /** + * Is the date currently represented by this object a valid date? + * + * @return boolean Validity, counting leap years, etc. + */ + public function isValid() + { + return ($this->_year >= 0 && $this->_year <= 9999); + } + + /** + * Compares this date to another date object to see which one is + * greater (later). Assumes that the dates are in the same + * timezone. + * + * @param mixed $other The date to compare to. + * + * @return integer == 0 if they are on the same date + * >= 1 if $this is greater (later) + * <= -1 if $other is greater (later) + */ + public function compareDate($other) + { + if (!($other instanceof Horde_Date)) { + $other = new Horde_Date($other); + } + + if ($this->_year != $other->year) { + return $this->_year - $other->year; + } + if ($this->_month != $other->month) { + return $this->_month - $other->month; + } + + return $this->_mday - $other->mday; + } + + /** + * Returns whether this date is after the other. + * + * @param mixed $other The date to compare to. + * + * @return boolean True if this date is after the other. + */ + public function after($other) + { + return $this->compareDate($other) > 0; + } + + /** + * Returns whether this date is before the other. + * + * @param mixed $other The date to compare to. + * + * @return boolean True if this date is before the other. + */ + public function before($other) + { + return $this->compareDate($other) < 0; + } + + /** + * Returns whether this date is the same like the other. + * + * @param mixed $other The date to compare to. + * + * @return boolean True if this date is the same like the other. + */ + public function equals($other) + { + return $this->compareDate($other) == 0; + } + + /** + * Compares this to another date object by time, to see which one + * is greater (later). Assumes that the dates are in the same + * timezone. + * + * @param mixed $other The date to compare to. + * + * @return integer == 0 if they are at the same time + * >= 1 if $this is greater (later) + * <= -1 if $other is greater (later) + */ + public function compareTime($other) + { + if (!($other instanceof Horde_Date)) { + $other = new Horde_Date($other); + } + + if ($this->_hour != $other->hour) { + return $this->_hour - $other->hour; + } + if ($this->_min != $other->min) { + return $this->_min - $other->min; + } + + return $this->_sec - $other->sec; + } + + /** + * Compares this to another date object, including times, to see + * which one is greater (later). Assumes that the dates are in the + * same timezone. + * + * @param mixed $other The date to compare to. + * + * @return integer == 0 if they are equal + * >= 1 if $this is greater (later) + * <= -1 if $other is greater (later) + */ + public function compareDateTime($other) + { + if (!($other instanceof Horde_Date)) { + $other = new Horde_Date($other); + } + + if ($diff = $this->compareDate($other)) { + return $diff; + } + + return $this->compareTime($other); + } + + /** + * Returns number of days between this date and another. + * + * @param Horde_Date $other The other day to diff with. + * + * @return integer The absolute number of days between the two dates. + */ + public function diff($other) + { + return abs($this->toDays() - $other->toDays()); + } + + /** + * Returns the time offset for local time zone. + * + * @param boolean $colon Place a colon between hours and minutes? + * + * @return string Timezone offset as a string in the format +HH:MM. + */ + public function tzOffset($colon = true) + { + return $colon ? $this->format('P') : $this->format('O'); + } + + /** + * Returns the unix timestamp representation of this date. + * + * @return integer A unix timestamp. + */ + public function timestamp() + { + if ($this->_year >= 1970 && $this->_year < 2038) { + return mktime($this->_hour, $this->_min, $this->_sec, + $this->_month, $this->_mday, $this->_year); + } + return $this->format('U'); + } + + /** + * Returns the unix timestamp representation of this date, 12:00am. + * + * @return integer A unix timestamp. + */ + public function datestamp() + { + if ($this->_year >= 1970 && $this->_year < 2038) { + return mktime(0, 0, 0, $this->_month, $this->_mday, $this->_year); + } + $date = new DateTime($this->format('Y-m-d')); + return $date->format('U'); + } + + /** + * Formats date and time to be passed around as a short url parameter. + * + * @return string Date and time. + */ + public function dateString() + { + return sprintf('%04d%02d%02d', $this->_year, $this->_month, $this->_mday); + } + + /** + * Formats date and time to the ISO format used by JSON. + * + * @return string Date and time. + */ + public function toJson() + { + return $this->format(self::DATE_JSON); + } + + /** + * Formats date and time to the RFC 2445 iCalendar DATE-TIME format. + * + * @param boolean $floating Whether to return a floating date-time + * (without time zone information). + * + * @return string Date and time. + */ + public function toiCalendar($floating = false) + { + if ($floating) { + return $this->format('Ymd\THis'); + } + $dateTime = $this->toDateTime(); + $dateTime->setTimezone(new DateTimeZone('UTC')); + return $dateTime->format('Ymd\THis\Z'); + } + + /** + * Formats time using the specifiers available in date() or in the DateTime + * class' format() method. + * + * To format in languages other than English, use strftime() instead. + * + * @param string $format + * + * @return string Formatted time. + */ + public function format($format) + { + if (!isset($this->_formatCache[$format])) { + $this->_formatCache[$format] = $this->toDateTime()->format($format); + } + return $this->_formatCache[$format]; + } + + /** + * Formats date and time using strftime() format. + * + * @return string strftime() formatted date and time. + */ + public function strftime($format) + { + if (preg_match('/%[^' . self::$_supportedSpecs . ']/', $format)) { + return strftime($format, $this->timestamp()); + } else { + return $this->_strftime($format); + } + } + + /** + * Formats date and time using a limited set of the strftime() format. + * + * @return string strftime() formatted date and time. + */ + protected function _strftime($format) + { + return preg_replace( + array('/%b/e', + '/%B/e', + '/%C/e', + '/%d/e', + '/%D/e', + '/%e/e', + '/%H/e', + '/%I/e', + '/%m/e', + '/%M/e', + '/%n/', + '/%p/e', + '/%R/e', + '/%S/e', + '/%t/', + '/%T/e', + '/%x/e', + '/%X/e', + '/%y/e', + '/%Y/', + '/%%/'), + array('$this->_strftime(Horde_Nls::getLangInfo(constant(\'ABMON_\' . (int)$this->_month)))', + '$this->_strftime(Horde_Nls::getLangInfo(constant(\'MON_\' . (int)$this->_month)))', + '(int)($this->_year / 100)', + 'sprintf(\'%02d\', $this->_mday)', + '$this->_strftime(\'%m/%d/%y\')', + 'sprintf(\'%2d\', $this->_mday)', + 'sprintf(\'%02d\', $this->_hour)', + 'sprintf(\'%02d\', $this->_hour == 0 ? 12 : ($this->_hour > 12 ? $this->_hour - 12 : $this->_hour))', + 'sprintf(\'%02d\', $this->_month)', + 'sprintf(\'%02d\', $this->_min)', + "\n", + '$this->_strftime(Horde_Nls::getLangInfo($this->_hour < 12 ? AM_STR : PM_STR))', + '$this->_strftime(\'%H:%M\')', + 'sprintf(\'%02d\', $this->_sec)', + "\t", + '$this->_strftime(\'%H:%M:%S\')', + '$this->_strftime(Horde_Nls::getLangInfo(D_FMT))', + '$this->_strftime(Horde_Nls::getLangInfo(T_FMT))', + 'substr(sprintf(\'%04d\', $this->_year), -2)', + (int)$this->_year, + '%'), + $format); + } + + /** + * Corrects any over- or underflows in any of the date's members. + * + * @param integer $mask We may not want to correct some overflows. + * @param integer $down Whether to correct the date up or down. + */ + protected function _correct($mask = self::MASK_ALLPARTS, $down = false) + { + if ($mask & self::MASK_SECOND) { + if ($this->_sec < 0 || $this->_sec > 59) { + $mask |= self::MASK_MINUTE; + + $this->_min += (int)($this->_sec / 60); + $this->_sec %= 60; + if ($this->_sec < 0) { + $this->_min--; + $this->_sec += 60; + } + } + } + + if ($mask & self::MASK_MINUTE) { + if ($this->_min < 0 || $this->_min > 59) { + $mask |= self::MASK_HOUR; + + $this->_hour += (int)($this->_min / 60); + $this->_min %= 60; + if ($this->_min < 0) { + $this->_hour--; + $this->_min += 60; + } + } + } + + if ($mask & self::MASK_HOUR) { + if ($this->_hour < 0 || $this->_hour > 23) { + $mask |= self::MASK_DAY; + + $this->_mday += (int)($this->_hour / 24); + $this->_hour %= 24; + if ($this->_hour < 0) { + $this->_mday--; + $this->_hour += 24; + } + } + } + + if ($mask & self::MASK_MONTH) { + $this->_correctMonth($down); + /* When correcting the month, always correct the day too. Months + * have different numbers of days. */ + $mask |= self::MASK_DAY; + } + + if ($mask & self::MASK_DAY) { + while ($this->_mday > 28 && + $this->_mday > Horde_Date_Utils::daysInMonth($this->_month, $this->_year)) { + if ($down) { + $this->_mday -= Horde_Date_Utils::daysInMonth($this->_month + 1, $this->_year) - Horde_Date_Utils::daysInMonth($this->_month, $this->_year); + } else { + $this->_mday -= Horde_Date_Utils::daysInMonth($this->_month, $this->_year); + $this->_month++; + } + $this->_correctMonth($down); + } + while ($this->_mday < 1) { + --$this->_month; + $this->_correctMonth($down); + $this->_mday += Horde_Date_Utils::daysInMonth($this->_month, $this->_year); + } + } + } + + /** + * Corrects the current month. + * + * This cannot be done in _correct() because that would also trigger a + * correction of the day, which would result in an infinite loop. + * + * @param integer $down Whether to correct the date up or down. + */ + protected function _correctMonth($down = false) + { + $this->_year += (int)($this->_month / 12); + $this->_month %= 12; + if ($this->_month < 1) { + $this->_year--; + $this->_month += 12; + } + } + + /** + * Handles args in order: year month day hour min sec tz + */ + protected function _initializeFromArgs($args) + { + $tz = (isset($args[6])) ? array_pop($args) : null; + $this->_initializeTimezone($tz); + + $args = array_slice($args, 0, 6); + $keys = array('year' => 1, 'month' => 1, 'mday' => 1, 'hour' => 0, 'min' => 0, 'sec' => 0); + $date = array_combine(array_slice(array_keys($keys), 0, count($args)), $args); + $date = array_merge($keys, $date); + + $this->_initializeFromArray($date); + } + + protected function _initializeFromArray($date) + { + if (isset($date['year']) && is_string($date['year']) && strlen($date['year']) == 2) { + if ($date['year'] > 70) { + $date['year'] += 1900; + } else { + $date['year'] += 2000; + } + } + + foreach ($date as $key => $val) { + if (in_array($key, array('year', 'month', 'mday', 'hour', 'min', 'sec'))) { + $this->{'_'. $key} = (int)$val; + } + } + + // If $date['day'] is present and numeric we may have been passed + // a Horde_Form_datetime array. + if (isset($date['day']) && + (string)(int)$date['day'] == $date['day']) { + $this->_mday = (int)$date['day']; + } + // 'minute' key also from Horde_Form_datetime + if (isset($date['minute']) && + (string)(int)$date['minute'] == $date['minute']) { + $this->_min = (int)$date['minute']; + } + + $this->_correct(); + } + + protected function _initializeFromObject($date) + { + if ($date instanceof DateTime) { + $this->_year = (int)$date->format('Y'); + $this->_month = (int)$date->format('m'); + $this->_mday = (int)$date->format('d'); + $this->_hour = (int)$date->format('H'); + $this->_min = (int)$date->format('i'); + $this->_sec = (int)$date->format('s'); + $this->_initializeTimezone($date->getTimezone()->getName()); + } else { + $is_horde_date = $date instanceof Horde_Date; + foreach (array('year', 'month', 'mday', 'hour', 'min', 'sec') as $key) { + if ($is_horde_date || isset($date->$key)) { + $this->{'_' . $key} = (int)$date->$key; + } + } + if (!$is_horde_date) { + $this->_correct(); + } else { + $this->_initializeTimezone($date->timezone); + } + } + } + + protected function _initializeTimezone($timezone) + { + if (empty($timezone)) { + $timezone = date_default_timezone_get(); + } + $this->_timezone = $timezone; + } + +} + +/** + * @category Horde + * @package Date + */ + +/** + * Horde Date wrapper/logic class, including some calculation + * functions. + * + * @category Horde + * @package Date + */ +class Horde_Date_Utils +{ + /** + * Returns whether a year is a leap year. + * + * @param integer $year The year. + * + * @return boolean True if the year is a leap year. + */ + public static function isLeapYear($year) + { + if (strlen($year) != 4 || preg_match('/\D/', $year)) { + return false; + } + + return (($year % 4 == 0 && $year % 100 != 0) || $year % 400 == 0); + } + + /** + * Returns the date of the year that corresponds to the first day of the + * given week. + * + * @param integer $week The week of the year to find the first day of. + * @param integer $year The year to calculate for. + * + * @return Horde_Date The date of the first day of the given week. + */ + public static function firstDayOfWeek($week, $year) + { + return new Horde_Date(sprintf('%04dW%02d', $year, $week)); + } + + /** + * Returns the number of days in the specified month. + * + * @param integer $month The month + * @param integer $year The year. + * + * @return integer The number of days in the month. + */ + public static function daysInMonth($month, $year) + { + static $cache = array(); + if (!isset($cache[$year][$month])) { + $date = new DateTime(sprintf('%04d-%02d-01', $year, $month)); + $cache[$year][$month] = $date->format('t'); + } + return $cache[$year][$month]; + } + + /** + * Returns a relative, natural language representation of a timestamp + * + * @todo Wider range of values ... maybe future time as well? + * @todo Support minimum resolution parameter. + * + * @param mixed $time The time. Any format accepted by Horde_Date. + * @param string $date_format Format to display date if timestamp is + * more then 1 day old. + * @param string $time_format Format to display time if timestamp is 1 + * day old. + * + * @return string The relative time (i.e. 2 minutes ago) + */ + public static function relativeDateTime($time, $date_format = '%x', + $time_format = '%X') + { + $date = new Horde_Date($time); + + $delta = time() - $date->timestamp(); + if ($delta < 60) { + return sprintf(Horde_Date_Translation::ngettext("%d second ago", "%d seconds ago", $delta), $delta); + } + + $delta = round($delta / 60); + if ($delta < 60) { + return sprintf(Horde_Date_Translation::ngettext("%d minute ago", "%d minutes ago", $delta), $delta); + } + + $delta = round($delta / 60); + if ($delta < 24) { + return sprintf(Horde_Date_Translation::ngettext("%d hour ago", "%d hours ago", $delta), $delta); + } + + if ($delta > 24 && $delta < 48) { + $date = new Horde_Date($time); + return sprintf(Horde_Date_Translation::t("yesterday at %s"), $date->strftime($time_format)); + } + + $delta = round($delta / 24); + if ($delta < 7) { + return sprintf(Horde_Date_Translation::t("%d days ago"), $delta); + } + + if (round($delta / 7) < 5) { + $delta = round($delta / 7); + return sprintf(Horde_Date_Translation::ngettext("%d week ago", "%d weeks ago", $delta), $delta); + } + + // Default to the user specified date format. + return $date->strftime($date_format); + } + + /** + * Tries to convert strftime() formatters to date() formatters. + * + * Unsupported formatters will be removed. + * + * @param string $format A strftime() formatting string. + * + * @return string A date() formatting string. + */ + public static function strftime2date($format) + { + $replace = array( + '/%a/' => 'D', + '/%A/' => 'l', + '/%d/' => 'd', + '/%e/' => 'j', + '/%j/' => 'z', + '/%u/' => 'N', + '/%w/' => 'w', + '/%U/' => '', + '/%V/' => 'W', + '/%W/' => '', + '/%b/' => 'M', + '/%B/' => 'F', + '/%h/' => 'M', + '/%m/' => 'm', + '/%C/' => '', + '/%g/' => '', + '/%G/' => 'o', + '/%y/' => 'y', + '/%Y/' => 'Y', + '/%H/' => 'H', + '/%I/' => 'h', + '/%i/' => 'g', + '/%M/' => 'i', + '/%p/' => 'A', + '/%P/' => 'a', + '/%r/' => 'h:i:s A', + '/%R/' => 'H:i', + '/%S/' => 's', + '/%T/' => 'H:i:s', + '/%X/e' => 'Horde_Date_Utils::strftime2date(Horde_Nls::getLangInfo(T_FMT))', + '/%z/' => 'O', + '/%Z/' => '', + '/%c/' => '', + '/%D/' => 'm/d/y', + '/%F/' => 'Y-m-d', + '/%s/' => 'U', + '/%x/e' => 'Horde_Date_Utils::strftime2date(Horde_Nls::getLangInfo(D_FMT))', + '/%n/' => "\n", + '/%t/' => "\t", + '/%%/' => '%' + ); + + return preg_replace(array_keys($replace), array_values($replace), $format); + } + +} |