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| 1 | <?php |
| 2 | |
| 3 | /** |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU General Public License |
| 6 | * as published by the Free Software Foundation; under version 2 |
| 7 | * of the License (non-upgradable). |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write to the Free Software |
| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 17 | * |
| 18 | * Copyright (c) 2013 (original work) Open Assessment Technologies SA (under the project TAO-PRODUCT); |
| 19 | * |
| 20 | * |
| 21 | */ |
| 22 | |
| 23 | namespace oat\tao\helpers; |
| 24 | |
| 25 | /** |
| 26 | * Helps manipulate intervals of dates with microseconds, extended from built in DateInterval |
| 27 | * |
| 28 | * Class DateIntervalMS |
| 29 | * @author Ivan Klimchuk <klimchuk@1pt.com> |
| 30 | * @package oat\tao\helpers |
| 31 | */ |
| 32 | class DateIntervalMS extends \DateInterval |
| 33 | { |
| 34 | public $u = 0; |
| 35 | |
| 36 | protected static $interval_spec_regex = "/ |
| 37 | ^ ## start of the string |
| 38 | P ## first character must be a P |
| 39 | (?:(?P<y>\d+)Y)? ## year |
| 40 | (?:(?P<m>\d+)M)? ## month |
| 41 | (?:(?P<d>\d+)D)? ## day |
| 42 | (?:T ## T delineates between day and time information |
| 43 | (?:(?P<h>\d+)H)? ## hour |
| 44 | (?:(?P<i>\d+)M)? ## minute |
| 45 | (?:(?P<s>\d+(?:\.\d+)?)S)? ## seconds as float. |
| 46 | )? ## closes 'T' subexpression |
| 47 | $ ## end of the string |
| 48 | /x"; |
| 49 | |
| 50 | /** |
| 51 | * Formatting for current date interval |
| 52 | * @param $format |
| 53 | * @return string |
| 54 | */ |
| 55 | public function format($format) |
| 56 | { |
| 57 | $format = str_replace('%U', sprintf("%06d", $this->u), $format); |
| 58 | $format = str_replace('%u', sprintf("%d", intval($this->u)), $format); |
| 59 | |
| 60 | return parent::format($format); |
| 61 | } |
| 62 | |
| 63 | /** |
| 64 | * Convert microseconds to seconds in float type |
| 65 | * @param $microseconds |
| 66 | * @return float |
| 67 | */ |
| 68 | public static function microsecondsToSeconds($microseconds) |
| 69 | { |
| 70 | $microseconds = intval($microseconds); |
| 71 | $seconds = round($microseconds / 1000000, 6); |
| 72 | |
| 73 | return $seconds; |
| 74 | } |
| 75 | |
| 76 | /** |
| 77 | * Convert seconds with microseconds as fraction to amount of microseconds |
| 78 | * @param $seconds |
| 79 | * @return int |
| 80 | */ |
| 81 | public static function secondsToMicroseconds($seconds) |
| 82 | { |
| 83 | $seconds = round($seconds, 6); |
| 84 | $microseconds = intval($seconds * 1000000); |
| 85 | |
| 86 | return $microseconds; |
| 87 | } |
| 88 | |
| 89 | /** |
| 90 | * Build valid DateInterval format |
| 91 | * @param array $parts |
| 92 | * @return string |
| 93 | */ |
| 94 | private static function getLegacySpec(array $parts) |
| 95 | { |
| 96 | $spec = "P"; |
| 97 | $spec .= $parts['y'] !== "" ? "{$parts['y']}Y" : ""; |
| 98 | $spec .= $parts['m'] !== "" ? "{$parts['m']}M" : ""; |
| 99 | $spec .= $parts['d'] !== "" ? "{$parts['d']}D" : ""; |
| 100 | if ($parts['h'] . $parts['i'] . $parts['s'] !== "") { |
| 101 | $spec .= "T"; |
| 102 | $spec .= $parts['h'] !== "" ? "{$parts['h']}H" : ""; |
| 103 | $spec .= $parts['i'] !== "" ? "{$parts['i']}M" : ""; |
| 104 | $spec .= $parts['s'] !== "" ? "{$parts['s']}S" : ""; |
| 105 | } |
| 106 | if ($spec === "P") { |
| 107 | $spec = ""; |
| 108 | } |
| 109 | |
| 110 | return $spec; |
| 111 | } |
| 112 | |
| 113 | /** |
| 114 | * Custom construct with support microseconds |
| 115 | * @param string $interval_spec |
| 116 | */ |
| 117 | public function __construct($interval_spec) |
| 118 | { |
| 119 | if (!preg_match(static::$interval_spec_regex, $interval_spec, $parts)) { |
| 120 | throw new \UnexpectedValueException( |
| 121 | sprintf( |
| 122 | "%s::%s: Unknown or bad format (%s)", |
| 123 | get_called_class(), |
| 124 | '__construct', |
| 125 | $interval_spec |
| 126 | ) |
| 127 | ); |
| 128 | } |
| 129 | |
| 130 | if (isset($parts['s'])) { |
| 131 | $preciseSeconds = floatval($parts['s']); |
| 132 | $microseconds = static::secondsToMicroseconds(fmod($preciseSeconds, 1.0)); |
| 133 | $seconds = floor($preciseSeconds); |
| 134 | $this->u = $microseconds; |
| 135 | $parts['s'] = $seconds; |
| 136 | } |
| 137 | |
| 138 | $legacy_spec = static::getLegacySpec($parts); |
| 139 | |
| 140 | parent::__construct($legacy_spec); |
| 141 | } |
| 142 | } |