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451 lines
13 KiB
PHP
451 lines
13 KiB
PHP
<?php
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/**
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* @copyright CONTENT CONTROL GmbH, http://www.contentcontrol-berlin.de
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* @author CONTENT CONTROL GmbH, http://www.contentcontrol-berlin.de
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* @license https://opensource.org/licenses/MIT MIT
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*/
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namespace OpenPsa\Ranger;
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use DateTime;
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use DateTimeImmutable;
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use IntlDateFormatter;
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use InvalidArgumentException;
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use OpenPsa\Ranger\Provider\DefaultProvider;
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class Ranger
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{
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const ERA = 0;
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const YEAR = 1;
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const QUARTER = 2;
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const MONTH = 3;
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const WEEK = 4;
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const DAY = 5;
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const AM = 6;
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const HOUR = 7;
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const MINUTE = 8;
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const SECOND = 9;
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const TIMEZONE = -1;
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const NO_MATCH = -2;
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/**
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* @var array
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*/
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private $pattern_characters = [
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'G' => self::ERA,
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'y' => self::YEAR,
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'Y' => self::YEAR,
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'u' => self::YEAR,
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'U' => self::YEAR,
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'r' => self::YEAR,
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'Q' => self::QUARTER,
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'q' => self::QUARTER,
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'M' => self::MONTH,
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'L' => self::MONTH,
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'w' => self::WEEK,
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'W' => self::WEEK,
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'd' => self::DAY,
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'D' => self::DAY,
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'F' => self::DAY,
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'g' => self::DAY,
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'E' => self::DAY,
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'e' => self::DAY,
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'c' => self::DAY,
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'a' => self::AM,
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'B' => self::AM,
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'h' => self::HOUR,
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'H' => self::HOUR,
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'k' => self::HOUR,
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'K' => self::HOUR,
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'm' => self::MINUTE,
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's' => self::SECOND,
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'S' => self::SECOND,
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'A' => self::SECOND,
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'z' => self::TIMEZONE,
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'Z' => self::TIMEZONE,
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'O' => self::TIMEZONE,
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'v' => self::TIMEZONE,
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'V' => self::TIMEZONE,
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'X' => self::TIMEZONE,
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'x' => self::TIMEZONE
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];
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/**
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* @var string
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*/
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private $escape_character = "'";
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/**
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* @var string
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*/
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private $virtual_separator = '<<<>>>';
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/**
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* @var string
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*/
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private $pattern;
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/**
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* @var array
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*/
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private $pattern_mask;
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/**
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* @var int
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*/
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private $precision;
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/**
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* @var string
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*/
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private $locale;
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/**
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* @var string
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*/
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private $range_separator = '–';
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/**
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* @var string
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*/
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private $date_time_separator = ', ';
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/**
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* @var int
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*/
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private $date_type = IntlDateFormatter::MEDIUM;
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/**
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* @var int
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*/
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private $time_type = IntlDateFormatter::NONE;
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/**
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* @param string $locale
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*/
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public function __construct(string $locale)
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{
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$this->locale = $locale;
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}
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/**
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* @param int $type One of the IntlDateFormatter constants
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* @return self
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*/
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public function setDateType(int $type)
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{
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if ($type !== $this->date_type) {
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$this->date_type = $type;
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$this->pattern_mask = [];
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$this->precision = 0;
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}
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return $this;
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}
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/**
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* @param int $type One of the IntlDateFormatter constants
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* @return self
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*/
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public function setTimeType(int $type)
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{
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if ($type !== $this->time_type) {
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$this->time_type = $type;
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$this->pattern_mask = [];
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$this->precision = 0;
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}
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return $this;
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}
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/**
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* @param string $separator
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* @return self
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*/
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public function setRangeSeparator(string $separator)
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{
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$this->range_separator = $separator;
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return $this;
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}
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/**
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* @param string $separator
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* @return self
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*/
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public function setDateTimeSeparator(string $separator)
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{
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$this->date_time_separator = $separator;
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return $this;
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}
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/**
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*
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* @param mixed $start
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* @param mixed $end
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* @return string
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*/
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public function format($start, $end) : string
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{
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$start = $this->prepare_date($start);
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$end = $this->prepare_date($end);
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$best_match = $this->find_best_match($start, $end);
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$this->parse_pattern();
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$start_tokens = $this->tokenize($start);
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$end_tokens = $this->tokenize($end);
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$left = '';
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foreach ($this->pattern_mask as $i => $part) {
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if ($part['delimiter']) {
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if ($part['content'] !== $this->virtual_separator) {
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$left .= $part['content'];
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}
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} else {
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if ($part['content'] > $best_match) {
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break;
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}
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$left .= $start_tokens[$i]['content'];
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}
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}
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if ($best_match >= $this->precision) {
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// the given dates are identical for the requested rendering
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return $left;
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}
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$right = '';
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for ($j = count($this->pattern_mask) - 1; $j + 1 > $i; $j--) {
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$part = $end_tokens[$j];
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if ($part['type'] == 'delimiter') {
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if ($part['content'] !== $this->virtual_separator) {
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$right = $part['content'] . $right;
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}
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} else {
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if ($part['type'] > $best_match) {
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break;
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}
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$right = $part['content'] . $right;
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}
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}
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$left_middle = '';
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$right_middle = '';
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for ($k = $i; $k <= $j; $k++) {
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if ($start_tokens[$k]['content'] !== $this->virtual_separator) {
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$left_middle .= $start_tokens[$k]['content'];
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}
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if ($end_tokens[$k]['content'] !== $this->virtual_separator) {
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$right_middle .= $end_tokens[$k]['content'];
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}
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}
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return $left . $left_middle . $this->get_range_separator($best_match) . $right_middle . $right;
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}
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/**
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* @param mixed $input
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* @throws InvalidArgumentException
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* @return DateTime
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*/
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private function prepare_date($input) : DateTime
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{
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if ($input instanceof DateTime) {
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return $input;
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}
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if ($input instanceof DateTimeImmutable) {
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$date = new DateTime('@' . $input->getTimestamp());
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$date->setTimezone($input->getTimezone());
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return $date;
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}
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if (is_numeric($input)) {
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$date = new Datetime;
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$date->setTimestamp(intval($input));
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return $date;
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}
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if (is_string($input)) {
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return new Datetime($input);
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}
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if ($input === null) {
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return new Datetime;
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}
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throw new InvalidArgumentException("Don't know how to handle " . gettype($input));
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}
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/**
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* @param int $best_match
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* @return string
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*/
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private function get_range_separator(int $best_match) : string
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{
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$intl = new IntlDateFormatter($this->locale, $this->date_type, $this->time_type);
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$provider_class = 'OpenPsa\\Ranger\\Provider\\' . ucfirst(substr($intl->getLocale(), 0, 2)) . 'Provider';
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if (!class_exists($provider_class)) {
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$provider_class = DefaultProvider::class;
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}
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$provider = new $provider_class();
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return $provider->modifySeparator($intl, $best_match, $this->range_separator);
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}
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/**
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* @param DateTime $date
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* @return array
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*/
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private function tokenize(DateTime $date) : array
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{
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$tokens = [];
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if ($this->date_type === IntlDateFormatter::NONE && $this->time_type === IntlDateFormatter::NONE) {
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// why would you want this?
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return $tokens;
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}
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$intl = new IntlDateFormatter($this->locale, IntlDateFormatter::NONE, IntlDateFormatter::NONE, $date->getTimezone(), null, $this->pattern);
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$formatted = $intl->format((int) $date->format('U'));
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$type = null;
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foreach ($this->pattern_mask as $part) {
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if ($part['delimiter']) {
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$parts = explode($part['content'], $formatted, 2);
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if (count($parts) == 2) {
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$tokens[] = ['type' => $type, 'content' => $parts[0]];
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$formatted = $parts[1];
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}
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$tokens[] = ['type' => 'delimiter', 'content' => $part['content']];
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} else {
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$type = $part['content'];
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}
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}
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if (!$part['delimiter']) {
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$tokens[] = ['type' => $type, 'content' => $formatted];
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}
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return $tokens;
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}
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/**
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* @param DateTime $start
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* @param DateTime $end
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* @return int
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*/
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private function find_best_match(DateTime $start, DateTime $end) : int
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{
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// make a copy of end because we might change pieces of it
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$end_copy = clone $end;
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// ignore the date if it's not output
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if ($this->date_type === IntlDateFormatter::NONE) {
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$end_copy->setDate($start->format('Y'), $start->format('m'), $start->format('d'));
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}
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$map = [
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'Y' => self::TIMEZONE,
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'm' => self::YEAR,
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'd' => self::MONTH,
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'a' => self::DAY,
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'H' => self::AM,
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'i' => self::AM, // it makes no sense to display something like 10:00:00 - 30:00...
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's' => self::AM, // it makes no sense to display something like 10:00:00 - 30...
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];
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$best_match = self::SECOND;
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foreach ($map as $part => $score) {
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if ($start->format($part) !== $end_copy->format($part)) {
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$best_match = $score;
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break;
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}
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}
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//set to same time to avoid DST problems
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$end_copy->setTimestamp((int) $start->format('U'));
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if ( $start->format('T') !== $end_copy->format('T')
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|| ( $this->time_type !== IntlDateFormatter::NONE
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&& $best_match < self::DAY)) {
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$best_match = self::NO_MATCH;
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}
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return $best_match;
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}
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private function parse_pattern()
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{
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if (!empty($this->pattern_mask)) {
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return;
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}
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$this->pattern = $pattern = '';
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if ($this->date_type !== IntlDateFormatter::NONE) {
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$intl = new IntlDateFormatter($this->locale, $this->date_type, IntlDateFormatter::NONE);
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$pattern .= $intl->getPattern();
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if ($this->time_type !== IntlDateFormatter::NONE) {
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$pattern .= "'" . $this->date_time_separator . "'";
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}
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}
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if ($this->time_type !== IntlDateFormatter::NONE) {
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$intl = new IntlDateFormatter($this->locale, IntlDateFormatter::NONE, $this->time_type);
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$pattern .= $intl->getPattern();
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}
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$esc_active = false;
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$part = ['content' => '', 'delimiter' => false];
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foreach (str_split($pattern) as $char) {
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if ($char == $this->escape_character) {
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if ($esc_active) {
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$esc_active = false;
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// @todo the esc char handling is untested
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if ($part['content'] === '') {
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//Literal '
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$part['content'] = $char;
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}
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} else {
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$esc_active = true;
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if (!$part['delimiter']) {
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$this->push_to_mask($part);
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$part = ['content' => '', 'delimiter' => true];
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}
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}
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} elseif ($esc_active) {
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$part['content'] .= $char;
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} elseif (!array_key_exists($char, $this->pattern_characters)) {
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if ($part['delimiter'] === false) {
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$this->push_to_mask($part);
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$part = ['content' => $char, 'delimiter' => true];
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} else {
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$part['content'] .= $char;
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}
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} else {
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if ($part['delimiter'] === true) {
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$this->push_to_mask($part);
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$part = ['content' => $this->pattern_characters[$char], 'delimiter' => false];
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} else {
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if ( $part['content'] !== ''
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&& $part['content'] !== $this->pattern_characters[$char]) {
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$this->push_to_mask($part);
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$this->push_to_mask(['content' => $this->virtual_separator, 'delimiter' => true]);
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$this->pattern .= $this->virtual_separator;
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$part = ['content' => '', 'delimiter' => false];
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}
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$part['content'] = $this->pattern_characters[$char];
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}
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}
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$this->pattern .= $char;
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}
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$this->push_to_mask($part);
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}
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/**
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* @param array $part
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*/
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private function push_to_mask(array $part)
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{
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if ($part['content'] !== '') {
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$this->pattern_mask[] = $part;
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if (!$part['delimiter']) {
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$this->precision = max($this->precision, $part['content']);
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}
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}
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}
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}
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