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Rob Davies 2017-02-13 15:31:17 +00:00
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654
web/core/lib/Drupal/Component/Datetime/DateTimePlus.php Normal file
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<?php
namespace Drupal\Component\Datetime;
use Drupal\Component\Utility\ToStringTrait;
/**
* Wraps DateTime().
*
* This class wraps the PHP DateTime class with more flexible initialization
* parameters, allowing a date to be created from an existing date object,
* a timestamp, a string with an unknown format, a string with a known
* format, or an array of date parts. It also adds an errors array
* and a __toString() method to the date object.
*
* This class is less lenient than the DateTime class. It changes
* the default behavior for handling date values like '2011-00-00'.
* The DateTime class would convert that value to '2010-11-30' and report
* a warning but not an error. This extension treats that as an error.
*
* As with the DateTime class, a date object may be created even if it has
* errors. It has an errors array attached to it that explains what the
* errors are. This is less disruptive than allowing datetime exceptions
* to abort processing. The calling script can decide what to do about
* errors using hasErrors() and getErrors().
*/
class DateTimePlus {
use ToStringTrait;
const FORMAT = 'Y-m-d H:i:s';
/**
* A RFC7231 Compliant date.
*
* http://tools.ietf.org/html/rfc7231#section-7.1.1.1
*
* Example: Sun, 06 Nov 1994 08:49:37 GMT
*/
const RFC7231 = 'D, d M Y H:i:s \G\M\T';
/**
* An array of possible date parts.
*/
protected static $dateParts = array(
'year',
'month',
'day',
'hour',
'minute',
'second',
);
/**
* The value of the time value passed to the constructor.
*/
protected $inputTimeRaw = '';
/**
* The prepared time, without timezone, for this date.
*/
protected $inputTimeAdjusted = '';
/**
* The value of the timezone passed to the constructor.
*/
protected $inputTimeZoneRaw = '';
/**
* The prepared timezone object used to construct this date.
*/
protected $inputTimeZoneAdjusted = '';
/**
* The value of the format passed to the constructor.
*/
protected $inputFormatRaw = '';
/**
* The prepared format, if provided.
*/
protected $inputFormatAdjusted = '';
/**
* The value of the language code passed to the constructor.
*/
protected $langcode = NULL;
/**
* An array of errors encountered when creating this date.
*/
protected $errors = array();
/**
* The DateTime object.
*
* @var \DateTime
*/
protected $dateTimeObject = NULL;
/**
* Creates a date object from an input date object.
*
* @param \DateTime $datetime
* A DateTime object.
* @param array $settings
* @see __construct()
*
* @return static
* A new DateTimePlus object.
*/
public static function createFromDateTime(\DateTime $datetime, $settings = array()) {
return new static($datetime->format(static::FORMAT), $datetime->getTimezone(), $settings);
}
/**
* Creates a date object from an array of date parts.
*
* Converts the input value into an ISO date, forcing a full ISO
* date even if some values are missing.
*
* @param array $date_parts
* An array of date parts, like ('year' => 2014, 'month' => 4).
* @param mixed $timezone
* (optional) \DateTimeZone object, time zone string or NULL. NULL uses the
* default system time zone. Defaults to NULL.
* @param array $settings
* (optional) A keyed array for settings, suitable for passing on to
* __construct().
*
* @return static
* A new DateTimePlus object.
*
* @throws \Exception
* If the array date values or value combination is not correct.
*/
public static function createFromArray(array $date_parts, $timezone = NULL, $settings = array()) {
$date_parts = static::prepareArray($date_parts, TRUE);
if (static::checkArray($date_parts)) {
// Even with validation, we can end up with a value that the
// DateTime class won't handle, like a year outside the range
// of -9999 to 9999, which will pass checkdate() but
// fail to construct a date object.
$iso_date = static::arrayToISO($date_parts);
return new static($iso_date, $timezone, $settings);
}
else {
throw new \Exception('The array contains invalid values.');
}
}
/**
* Creates a date object from timestamp input.
*
* The timezone of a timestamp is always UTC. The timezone for a
* timestamp indicates the timezone used by the format() method.
*
* @param int $timestamp
* A UNIX timestamp.
* @param mixed $timezone
* @see __construct()
* @param array $settings
* @see __construct()
*
* @return static
* A new DateTimePlus object.
*
* @throws \Exception
* If the timestamp is not numeric.
*/
public static function createFromTimestamp($timestamp, $timezone = NULL, $settings = array()) {
if (!is_numeric($timestamp)) {
throw new \Exception('The timestamp must be numeric.');
}
$datetime = new static('', $timezone, $settings);
$datetime->setTimestamp($timestamp);
return $datetime;
}
/**
* Creates a date object from an input format.
*
* @param string $format
* PHP date() type format for parsing the input. This is recommended
* to use things like negative years, which php's parser fails on, or
* any other specialized input with a known format. If provided the
* date will be created using the createFromFormat() method.
* @see http://php.net/manual/datetime.createfromformat.php
* @param mixed $time
* @see __construct()
* @param mixed $timezone
* @see __construct()
* @param array $settings
* - validate_format: (optional) Boolean choice to validate the
* created date using the input format. The format used in
* createFromFormat() allows slightly different values than format().
* Using an input format that works in both functions makes it
* possible to a validation step to confirm that the date created
* from a format string exactly matches the input. This option
* indicates the format can be used for validation. Defaults to TRUE.
* @see __construct()
*
* @return static
* A new DateTimePlus object.
*
* @throws \Exception
* If the a date cannot be created from the given format, or if the
* created date does not match the input value.
*/
public static function createFromFormat($format, $time, $timezone = NULL, $settings = array()) {
if (!isset($settings['validate_format'])) {
$settings['validate_format'] = TRUE;
}
// Tries to create a date from the format and use it if possible.
// A regular try/catch won't work right here, if the value is
// invalid it doesn't return an exception.
$datetimeplus = new static('', $timezone, $settings);
$date = \DateTime::createFromFormat($format, $time, $datetimeplus->getTimezone());
if (!$date instanceof \DateTime) {
throw new \Exception('The date cannot be created from a format.');
}
else {
// Functions that parse date is forgiving, it might create a date that
// is not exactly a match for the provided value, so test for that by
// re-creating the date/time formatted string and comparing it to the input. For
// instance, an input value of '11' using a format of Y (4 digits) gets
// created as '0011' instead of '2011'.
if ($date instanceof DateTimePlus) {
$test_time = $date->format($format, $settings);
}
elseif ($date instanceof \DateTime) {
$test_time = $date->format($format);
}
$datetimeplus->setTimestamp($date->getTimestamp());
$datetimeplus->setTimezone($date->getTimezone());
if ($settings['validate_format'] && $test_time != $time) {
throw new \Exception('The created date does not match the input value.');
}
}
return $datetimeplus;
}
/**
* Constructs a date object set to a requested date and timezone.
*
* @param string $time
* (optional) A date/time string. Defaults to 'now'.
* @param mixed $timezone
* (optional) \DateTimeZone object, time zone string or NULL. NULL uses the
* default system time zone. Defaults to NULL.
* @param array $settings
* (optional) Keyed array of settings. Defaults to empty array.
* - langcode: (optional) String two letter language code used to control
* the result of the format(). Defaults to NULL.
* - debug: (optional) Boolean choice to leave debug values in the
* date object for debugging purposes. Defaults to FALSE.
*/
public function __construct($time = 'now', $timezone = NULL, $settings = array()) {
// Unpack settings.
$this->langcode = !empty($settings['langcode']) ? $settings['langcode'] : NULL;
// Massage the input values as necessary.
$prepared_time = $this->prepareTime($time);
$prepared_timezone = $this->prepareTimezone($timezone);
try {
if (!empty($prepared_time)) {
$test = date_parse($prepared_time);
if (!empty($test['errors'])) {
$this->errors[] = $test['errors'];
}
}
if (empty($this->errors)) {
$this->dateTimeObject = new \DateTime($prepared_time, $prepared_timezone);
}
}
catch (\Exception $e) {
$this->errors[] = $e->getMessage();
}
// Clean up the error messages.
$this->checkErrors();
$this->errors = array_unique($this->errors);
}
/**
* Renders the timezone name.
*
* @return string
*/
public function render() {
return $this->format(static::FORMAT) . ' ' . $this->getTimeZone()->getName();
}
/**
* Implements the magic __call method.
*
* Passes through all unknown calls onto the DateTime object.
*/
public function __call($method, $args) {
// @todo consider using assert() as per https://www.drupal.org/node/2451793.
if (!isset($this->dateTimeObject)) {
throw new \Exception('DateTime object not set.');
}
if (!method_exists($this->dateTimeObject, $method)) {
throw new \BadMethodCallException(sprintf('Call to undefined method %s::%s()', get_class($this), $method));
}
return call_user_func_array(array($this->dateTimeObject, $method), $args);
}
/**
* Returns the difference between two DateTimePlus objects.
*
* @param \Drupal\Component\Datetime\DateTimePlus|\DateTime $datetime2
* The date to compare to.
* @param bool $absolute
* Should the interval be forced to be positive?
*
* @return \DateInterval
* A DateInterval object representing the difference between the two dates.
*
* @throws \BadMethodCallException
* If the input isn't a DateTime or DateTimePlus object.
*/
public function diff($datetime2, $absolute = FALSE) {
if ($datetime2 instanceof DateTimePlus) {
$datetime2 = $datetime2->dateTimeObject;
}
if (!($datetime2 instanceof \DateTime)) {
throw new \BadMethodCallException(sprintf('Method %s expects parameter 1 to be a \DateTime or \Drupal\Component\Datetime\DateTimePlus object', __METHOD__));
}
return $this->dateTimeObject->diff($datetime2, $absolute);
}
/**
* Implements the magic __callStatic method.
*
* Passes through all unknown static calls onto the DateTime object.
*/
public static function __callStatic($method, $args) {
if (!method_exists('\DateTime', $method)) {
throw new \BadMethodCallException(sprintf('Call to undefined method %s::%s()', get_called_class(), $method));
}
return call_user_func_array(array('\DateTime', $method), $args);
}
/**
* Implements the magic __clone method.
*
* Deep-clones the DateTime object we're wrapping.
*/
public function __clone() {
$this->dateTimeObject = clone($this->dateTimeObject);
}
/**
* Prepares the input time value.
*
* Changes the input value before trying to use it, if necessary.
* Can be overridden to handle special cases.
*
* @param mixed $time
* An input value, which could be a timestamp, a string,
* or an array of date parts.
*
* @return mixed
* The massaged time.
*/
protected function prepareTime($time) {
return $time;
}
/**
* Prepares the input timezone value.
*
* Changes the timezone before trying to use it, if necessary.
* Most importantly, makes sure there is a valid timezone
* object before moving further.
*
* @param mixed $timezone
* Either a timezone name or a timezone object or NULL.
*
* @return \DateTimeZone
* The massaged time zone.
*/
protected function prepareTimezone($timezone) {
// If the input timezone is a valid timezone object, use it.
if ($timezone instanceof \DateTimezone) {
$timezone_adjusted = $timezone;
}
// Allow string timezone input, and create a timezone from it.
elseif (!empty($timezone) && is_string($timezone)) {
$timezone_adjusted = new \DateTimeZone($timezone);
}
// Default to the system timezone when not explicitly provided.
// If the system timezone is missing, use 'UTC'.
if (empty($timezone_adjusted) || !$timezone_adjusted instanceof \DateTimezone) {
$system_timezone = date_default_timezone_get();
$timezone_name = !empty($system_timezone) ? $system_timezone : 'UTC';
$timezone_adjusted = new \DateTimeZone($timezone_name);
}
// We are finally certain that we have a usable timezone.
return $timezone_adjusted;
}
/**
* Prepares the input format value.
*
* Changes the input format before trying to use it, if necessary.
* Can be overridden to handle special cases.
*
* @param string $format
* A PHP format string.
*
* @return string
* The massaged PHP format string.
*/
protected function prepareFormat($format) {
return $format;
}
/**
* Examines getLastErrors() to see what errors to report.
*
* Two kinds of errors are important: anything that DateTime
* considers an error, and also a warning that the date was invalid.
* PHP creates a valid date from invalid data with only a warning,
* 2011-02-30 becomes 2011-03-03, for instance, but we don't want that.
*
* @see http://php.net/manual/time.getlasterrors.php
*/
public function checkErrors() {
$errors = \DateTime::getLastErrors();
if (!empty($errors['errors'])) {
$this->errors += $errors['errors'];
}
// Most warnings are messages that the date could not be parsed
// which causes it to be altered. For validation purposes, a warning
// as bad as an error, because it means the constructed date does
// not match the input value.
if (!empty($errors['warnings'])) {
$this->errors[] = 'The date is invalid.';
}
}
/**
* Detects if there were errors in the processing of this date.
*
* @return bool
* TRUE if there were errors in the processing of this date, FALSE
* otherwise.
*/
public function hasErrors() {
return (boolean) count($this->errors);
}
/**
* Gets error messages.
*
* Public function to return the error messages.
*
* @return array
* An array of errors encountered when creating this date.
*/
public function getErrors() {
return $this->errors;
}
/**
* Creates an ISO date from an array of values.
*
* @param array $array
* An array of date values keyed by date part.
* @param bool $force_valid_date
* (optional) Whether to force a full date by filling in missing
* values. Defaults to FALSE.
*
* @return string
* The date as an ISO string.
*/
public static function arrayToISO($array, $force_valid_date = FALSE) {
$array = static::prepareArray($array, $force_valid_date);
$input_time = '';
if ($array['year'] !== '') {
$input_time = static::datePad(intval($array['year']), 4);
if ($force_valid_date || $array['month'] !== '') {
$input_time .= '-' . static::datePad(intval($array['month']));
if ($force_valid_date || $array['day'] !== '') {
$input_time .= '-' . static::datePad(intval($array['day']));
}
}
}
if ($array['hour'] !== '') {
$input_time .= $input_time ? 'T' : '';
$input_time .= static::datePad(intval($array['hour']));
if ($force_valid_date || $array['minute'] !== '') {
$input_time .= ':' . static::datePad(intval($array['minute']));
if ($force_valid_date || $array['second'] !== '') {
$input_time .= ':' . static::datePad(intval($array['second']));
}
}
}
return $input_time;
}
/**
* Creates a complete array from a possibly incomplete array of date parts.
*
* @param array $array
* An array of date values keyed by date part.
* @param bool $force_valid_date
* (optional) Whether to force a valid date by filling in missing
* values with valid values or just to use empty values instead.
* Defaults to FALSE.
*
* @return array
* A complete array of date parts.
*/
public static function prepareArray($array, $force_valid_date = FALSE) {
if ($force_valid_date) {
$now = new \DateTime();
$array += array(
'year' => $now->format('Y'),
'month' => 1,
'day' => 1,
'hour' => 0,
'minute' => 0,
'second' => 0,
);
}
else {
$array += array(
'year' => '',
'month' => '',
'day' => '',
'hour' => '',
'minute' => '',
'second' => '',
);
}
return $array;
}
/**
* Checks that arrays of date parts will create a valid date.
*
* Checks that an array of date parts has a year, month, and day,
* and that those values create a valid date. If time is provided,
* verifies that the time values are valid. Sort of an
* equivalent to checkdate().
*
* @param array $array
* An array of datetime values keyed by date part.
*
* @return bool
* TRUE if the datetime parts contain valid values, otherwise FALSE.
*/
public static function checkArray($array) {
$valid_date = FALSE;
$valid_time = TRUE;
// Check for a valid date using checkdate(). Only values that
// meet that test are valid.
if (array_key_exists('year', $array) && array_key_exists('month', $array) && array_key_exists('day', $array)) {
if (@checkdate($array['month'], $array['day'], $array['year'])) {
$valid_date = TRUE;
}
}
// Testing for valid time is reversed. Missing time is OK,
// but incorrect values are not.
foreach (array('hour', 'minute', 'second') as $key) {
if (array_key_exists($key, $array)) {
$value = $array[$key];
switch ($key) {
case 'hour':
if (!preg_match('/^([1-2][0-3]|[01]?[0-9])$/', $value)) {
$valid_time = FALSE;
}
break;
case 'minute':
case 'second':
default:
if (!preg_match('/^([0-5][0-9]|[0-9])$/', $value)) {
$valid_time = FALSE;
}
break;
}
}
}
return $valid_date && $valid_time;
}
/**
* Pads date parts with zeros.
*
* Helper function for a task that is often required when working with dates.
*
* @param int $value
* The value to pad.
* @param int $size
* (optional) Size expected, usually 2 or 4. Defaults to 2.
*
* @return string
* The padded value.
*/
public static function datePad($value, $size = 2) {
return sprintf("%0" . $size . "d", $value);
}
/**
* Formats the date for display.
*
* @param string $format
* A format string using either PHP's date().
* @param array $settings
* - timezone: (optional) String timezone name. Defaults to the timezone
* of the date object.
*
* @return string
* The formatted value of the date.
*/
public function format($format, $settings = array()) {
// If there were construction errors, we can't format the date.
if ($this->hasErrors()) {
return;
}
// Format the date and catch errors.
try {
// Clone the date/time object so we can change the time zone without
// disturbing the value stored in the object.
$dateTimeObject = clone $this->dateTimeObject;
if (isset($settings['timezone'])) {
$dateTimeObject->setTimezone(new \DateTimeZone($settings['timezone']));
}
$value = $dateTimeObject->format($format);
}
catch (\Exception $e) {
$this->errors[] = $e->getMessage();
}
return $value;
}
}

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web/core/lib/Drupal/Component/Datetime/LICENSE.txt Normal file
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4. You may not copy, modify, sublicense, or distribute the Program
except as expressly provided under this License. Any attempt
otherwise to copy, modify, sublicense or distribute the Program is
void, and will automatically terminate your rights under this License.
However, parties who have received copies, or rights, from you under
this License will not have their licenses terminated so long as such
parties remain in full compliance.
5. You are not required to accept this License, since you have not
signed it. However, nothing else grants you permission to modify or
distribute the Program or its derivative works. These actions are
prohibited by law if you do not accept this License. Therefore, by
modifying or distributing the Program (or any work based on the
Program), you indicate your acceptance of this License to do so, and
all its terms and conditions for copying, distributing or modifying
the Program or works based on it.
6. Each time you redistribute the Program (or any work based on the
Program), the recipient automatically receives a license from the
original licensor to copy, distribute or modify the Program subject to
these terms and conditions. You may not impose any further
restrictions on the recipients' exercise of the rights granted herein.
You are not responsible for enforcing compliance by third parties to
this License.
7. If, as a consequence of a court judgment or allegation of patent
infringement or for any other reason (not limited to patent issues),
conditions are imposed on you (whether by court order, agreement or
otherwise) that contradict the conditions of this License, they do not
excuse you from the conditions of this License. If you cannot
distribute so as to satisfy simultaneously your obligations under this
License and any other pertinent obligations, then as a consequence you
may not distribute the Program at all. For example, if a patent
license would not permit royalty-free redistribution of the Program by
all those who receive copies directly or indirectly through you, then
the only way you could satisfy both it and this License would be to
refrain entirely from distribution of the Program.
If any portion of this section is held invalid or unenforceable under
any particular circumstance, the balance of the section is intended to
apply and the section as a whole is intended to apply in other
circumstances.
It is not the purpose of this section to induce you to infringe any
patents or other property right claims or to contest validity of any
such claims; this section has the sole purpose of protecting the
integrity of the free software distribution system, which is
implemented by public license practices. Many people have made
generous contributions to the wide range of software distributed
through that system in reliance on consistent application of that
system; it is up to the author/donor to decide if he or she is willing
to distribute software through any other system and a licensee cannot
impose that choice.
This section is intended to make thoroughly clear what is believed to
be a consequence of the rest of this License.
8. If the distribution and/or use of the Program is restricted in
certain countries either by patents or by copyrighted interfaces, the
original copyright holder who places the Program under this License
may add an explicit geographical distribution limitation excluding
those countries, so that distribution is permitted only in or among
countries not thus excluded. In such case, this License incorporates
the limitation as if written in the body of this License.
9. The Free Software Foundation may publish revised and/or new versions
of the General Public License from time to time. Such new versions will
be similar in spirit to the present version, but may differ in detail to
address new problems or concerns.
Each version is given a distinguishing version number. If the Program
specifies a version number of this License which applies to it and "any
later version", you have the option of following the terms and conditions
either of that version or of any later version published by the Free
Software Foundation. If the Program does not specify a version number of
this License, you may choose any version ever published by the Free Software
Foundation.
10. If you wish to incorporate parts of the Program into other free
programs whose distribution conditions are different, write to the author
to ask for permission. For software which is copyrighted by the Free
Software Foundation, write to the Free Software Foundation; we sometimes
make exceptions for this. Our decision will be guided by the two goals
of preserving the free status of all derivatives of our free software and
of promoting the sharing and reuse of software generally.
NO WARRANTY
11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS
TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
REPAIR OR CORRECTION.
12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES.
END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
convey the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
Also add information on how to contact you by electronic and paper mail.
If the program is interactive, make it output a short notice like this
when it starts in an interactive mode:
Gnomovision version 69, Copyright (C) year name of author
Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, the commands you use may
be called something other than `show w' and `show c'; they could even be
mouse-clicks or menu items--whatever suits your program.
You should also get your employer (if you work as a programmer) or your
school, if any, to sign a "copyright disclaimer" for the program, if
necessary. Here is a sample; alter the names:
Yoyodyne, Inc., hereby disclaims all copyright interest in the program
`Gnomovision' (which makes passes at compilers) written by James Hacker.
<signature of Ty Coon>, 1 April 1989
Ty Coon, President of Vice
This General Public License does not permit incorporating your program into
proprietary programs. If your program is a subroutine library, you may
consider it more useful to permit linking proprietary applications with the
library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License.

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The Drupal Datetime Component
Thanks for using this Drupal component.
You can participate in its development on Drupal.org, through our issue system:
https://www.drupal.org/project/issues/drupal
You can get the full Drupal repo here:
https://www.drupal.org/project/drupal/git-instructions
You can browse the full Drupal repo here:
http://cgit.drupalcode.org/drupal

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HOW-TO: Test this Drupal component
In order to test this component, you'll need to get the entire Drupal repo and
run the tests there.
You'll find the tests under core/tests/Drupal/Tests/Component.
You can get the full Drupal repo here:
https://www.drupal.org/project/drupal/git-instructions
You can find more information about running PHPUnit tests with Drupal here:
https://www.drupal.org/node/2116263
Each component in the Drupal\Component namespace has its own annotated test
group. You can use this group to run only the tests for this component. Like
this:
$ ./vendor/bin/phpunit -c core --group Datetime

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{
"name": "drupal/core-datetime",
"description": "This class wraps the PHP DateTime class with more flexible initialization parameters, allowing a date to be created from an existing date object, a timestamp, a string with an unknown format, a string with a known format, or an array of date parts. It also adds an errors array and a __toString() method to the date object.",
"keywords": ["drupal"],
"homepage": "https://www.drupal.org/project/drupal",
"license": "GPL-2.0+",
"require": {
"php": ">=5.5.9",
"drupal/core-utility": "~8.2"
},
"autoload": {
"psr-4": {
"Drupal\\Component\\Datetime\\": ""
}
}
}