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<?php |
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namespace common\components; |
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use yii; |
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use \DateTime; |
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use \DateTimeZone; |
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class Time extends \yii\base\BaseObject implements \common\interfaces\TimeInterface { |
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public const EARLIEST_DATE = '2014-01-01'; |
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public $timezone; |
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public function __construct(String $timezone, $config = []) { |
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$this->timezone = $timezone; |
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parent::__construct($config); |
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} |
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/* |
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* Parses the supplied string into a `\DateTime` object of the |
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* given `$format`. It assumes the supplied string is in the |
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* timezone specified in $this->timezone. |
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* |
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* @param string $time the questionable time to parse |
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* @param string $format the format `$time` is expected to be in |
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* @return \DateTime the parsed time or false |
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*/ |
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public function parse(string $time, string $format = 'Y-m-d') { |
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$dt = DateTime::createFromFormat($format, $time, new DateTimeZone($this->timezone)); |
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if($dt) { |
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// for some reason, using createFromFromat adds in the time. The regular DateTime constructor _does not_ do this. We manually zero out the time here to make the DateTime objects match. |
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$dt->setTime(0, 0, 0); |
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$formatted = $dt->format($format); |
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if($formatted === $time && $this->inBounds($dt)) { |
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return $dt; |
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} |
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} |
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return false; |
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} |
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/* |
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* Checks if the given `\DateTime` is within acceptable date bounds. |
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* It does no good to have the date be far in the past or in the future. |
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* |
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* @param \DateTime $dt |
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* @return boolean |
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*/ |
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public function inBounds(DateTime $dt) { |
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$first = strtotime((new DateTime(self::EARLIEST_DATE))->format('Y-m-d')); |
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$test = strtotime($dt->format('Y-m-d')); |
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$now = strtotime($this->getLocalDate()); |
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if($first <= $test && $test <= $now) { |
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return true; |
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} else { |
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return false; |
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} |
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} |
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public function convertLocalToUTC($local, $inc_time = true) { |
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$fmt = $inc_time ? "Y-m-d H:i:s" : "Y-m-d"; |
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$timestamp = new DateTime($local, new DateTimeZone($this->timezone)); |
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$timestamp->setTimeZone(new DateTimeZone("UTC")); |
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return $timestamp->format($fmt); |
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} |
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public function convertUTCToLocal($utc, $iso = true) { |
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$fmt = $iso ? Datetime::ATOM : "Y-m-d H:i:s"; |
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$timestamp = new DateTime($utc, new DateTimeZone("UTC")); |
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$timestamp->setTimeZone(new DateTimeZone($this->timezone)); |
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return $timestamp->format($fmt); |
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} |
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public function getLocalTime($timezone = null) { |
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if($timezone === null) |
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$timezone = $this->timezone; |
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$timestamp = new DateTime("now", new DateTimeZone($timezone)); |
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return $timestamp->format("Y-m-d H:i:s"); |
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} |
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public function getLocalDate($timezone = null) { |
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if($timezone === null) |
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$timezone = $this->timezone; |
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return (new DateTime("now", new DateTimeZone($timezone))) |
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->format("Y-m-d"); |
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} |
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public function alterLocalDate($date, $modifier) { |
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return (new DateTime("$date $modifier", new DateTimeZone($this->timezone))) |
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->format("Y-m-d"); |
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} |
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public function getUTCBookends($local) { |
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$local = trim($local); |
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if(strpos($local, " ")) { |
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return false; |
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} |
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$start = $local . " 00:00:00"; |
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$end = $local . "23:59:59"; |
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$front = self::convertLocalToUTC($start); |
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$back = self::convertLocalToUTC($end); |
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return [$front, $back]; |
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} |
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} |
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CorWatts /
fasterscale
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