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| 1 | <?php |
| 2 | |
| 3 | declare( strict_types=1 ); |
| 4 | |
| 5 | namespace MediaWiki\Extension\CampaignEvents; |
| 6 | |
| 7 | use DateTime; |
| 8 | use DateTimeZone; |
| 9 | use MediaWiki\DAO\WikiAwareEntity; |
| 10 | use MediaWiki\Extension\CampaignEvents\Event\ExistingEventRegistration; |
| 11 | use MediaWiki\Extension\CampaignEvents\Participants\Participant; |
| 12 | use MediaWiki\Extension\CampaignEvents\Questions\EventAggregatedAnswersStore; |
| 13 | use MediaWiki\User\UserTimeCorrection; |
| 14 | use MediaWiki\Utils\MWTimestamp; |
| 15 | use MediaWiki\WikiMap\WikiMap; |
| 16 | |
| 17 | /** |
| 18 | * Simple utility methods. |
| 19 | */ |
| 20 | class Utils { |
| 21 | public const VIRTUAL_DB_DOMAIN = 'virtual-campaignevents'; |
| 22 | |
| 23 | /** |
| 24 | * @param string|false $wikiID |
| 25 | * @return string |
| 26 | */ |
| 27 | public static function getWikiIDString( $wikiID ): string { |
| 28 | return $wikiID !== WikiAwareEntity::LOCAL ? $wikiID : WikiMap::getCurrentWikiId(); |
| 29 | } |
| 30 | |
| 31 | /** |
| 32 | * Guesses the direction of a string, e.g. an address, for use in the "dir" attribute. |
| 33 | * |
| 34 | * @param string $address |
| 35 | * @return string Either 'ltr' or 'rtl' |
| 36 | */ |
| 37 | public static function guessStringDirection( string $address ): string { |
| 38 | // Taken from https://stackoverflow.com/a/48918886/7369689 |
| 39 | $rtlRe = '/[\x{0590}-\x{083F}]|[\x{08A0}-\x{08FF}]|[\x{FB1D}-\x{FDFF}]|[\x{FE70}-\x{FEFF}]/u'; |
| 40 | return preg_match( $rtlRe, $address ) ? 'rtl' : 'ltr'; |
| 41 | } |
| 42 | |
| 43 | /** |
| 44 | * @internal |
| 45 | * Converts a DateTimeZone object into a UserTimeCorrection object. |
| 46 | * This logic could perhaps be moved to UserTimeCorrection in the future. |
| 47 | * |
| 48 | * @param DateTimeZone $tz |
| 49 | * @return UserTimeCorrection |
| 50 | */ |
| 51 | public static function timezoneToUserTimeCorrection( DateTimeZone $tz ): UserTimeCorrection { |
| 52 | // Timezones in PHP can be either a geographical zone ("Europe/Rome"), an offset ("+01:00"), or |
| 53 | // an abbreviation ("GMT"). PHP provides no way to tell which format a timezone object uses. |
| 54 | // DateTimeZone seems to have an internal timezone_type property but it's set magically and inaccessible. |
| 55 | // Also, 'UTC' is surprisingly categorized as a geographical zone, and getLocation() does not return false |
| 56 | // for it, but rather an array with incomplete data. PHP, WTF?! |
| 57 | $timezoneName = $tz->getName(); |
| 58 | if ( strpos( $timezoneName, '/' ) !== false ) { |
| 59 | // Geographical format, convert to the format used by UserTimeCorrection. |
| 60 | $minDiff = floor( $tz->getOffset( new DateTime() ) / 60 ); |
| 61 | return new UserTimeCorrection( "ZoneInfo|$minDiff|$timezoneName" ); |
| 62 | } |
| 63 | if ( preg_match( '/^[+-]\d{2}:\d{2}$/', $timezoneName ) ) { |
| 64 | // Offset, which UserTimeCorrection accepts directly. |
| 65 | return new UserTimeCorrection( $timezoneName ); |
| 66 | } |
| 67 | // Non-geographical named zone. Convert to offset because UserTimeCorrection only accepts |
| 68 | // the other two types. In theory, this conversion shouldn't change the absolute time and it should |
| 69 | // not depend on DST, because abbreviations already contain information about DST (e.g., "PST" vs "PDT"). |
| 70 | // TODO This assumption may be false for some abbreviations, see T316688#8336443. |
| 71 | |
| 72 | // Work around PHP bug: all versions of PHP up to 7.4.x, 8.0.20 and 8.1.7 do not parse DST correctly for |
| 73 | // time zone abbreviations, and PHP assumes that *all* abbreviations correspond to time zones without DST. |
| 74 | // So we can't use DateTimeZone::getOffset(), and the timezone must also be specified inside the time string, |
| 75 | // and not as second argument to DateTime::__construct. See https://bugs.php.net/bug.php?id=74671 |
| 76 | $randomTime = '2022-10-20 18:00:00 ' . $timezoneName; |
| 77 | $offset = ( new DateTime( $randomTime ) )->format( 'P' ); |
| 78 | return new UserTimeCorrection( $offset ); |
| 79 | } |
| 80 | |
| 81 | /** |
| 82 | * Given a participant and an event registration, returns the timestamp when the answers of this participant should |
| 83 | * be aggregated. This method may return a timestamp in the past (e.g., if it's recent enough that we still haven't |
| 84 | * been able to aggregate the answers), but it will return null if the participant never answered any questions, or |
| 85 | * if their answers have already been aggregated. In particular, this means that if the answers have already been |
| 86 | * aggregated, the aggregation timestamp is ignored. This is motivated by the current UI, where participant whose |
| 87 | * answers have been aggregated are treated the same as those who never answered any question. |
| 88 | * |
| 89 | * @param Participant $participant |
| 90 | * @param ExistingEventRegistration $event |
| 91 | * @return string|null Timestamp in TS_UNIX format |
| 92 | */ |
| 93 | public static function getAnswerAggregationTimestamp( |
| 94 | Participant $participant, |
| 95 | ExistingEventRegistration $event |
| 96 | ): ?string { |
| 97 | $firstAnswerTime = $participant->getFirstAnswerTimestamp(); |
| 98 | if ( $firstAnswerTime === null || $participant->getAggregationTimestamp() !== null ) { |
| 99 | return null; |
| 100 | } |
| 101 | $participantAggregationTS = (int)$firstAnswerTime + EventAggregatedAnswersStore::ANSWERS_TTL_SEC; |
| 102 | $eventAggregationTS = (int)MWTimestamp::convert( TS_UNIX, $event->getEndUTCTimestamp() ); |
| 103 | return (string)min( $participantAggregationTS, $eventAggregationTS ); |
| 104 | } |
| 105 | } |