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<?php
/**
* A class for querying translated time units from CLDR data.
*
* @author Niklas Laxström
* @author Ryan Kaldari
* @copyright Copyright © 2007-2013
* @license GPL-2.0-or-later
*/
class TimeUnits extends CldrNames {
private static $cache = [];
/**
* Get localized time units for a particular language, using fallback languages for missing
* items. The time units are returned as an associative array. The keys are of the form:
* <unit>-<tense>-<ordinality> (for example, 'hour-future-two'). The values include a placeholder
* for the number (for example, '{0} months ago').
*
* @param string $code The language to return the list in
* @return array an associative array of time unit codes and localized time units
*/
public static function getUnits( $code ) {
// Load time units localized for the requested language
$units = self::loadLanguage( $code );
if ( $units ) {
return $units;
}
// Load missing time units from fallback languages
$fallbacks = Language::getFallbacksFor( $code );
foreach ( $fallbacks as $fallback ) {
if ( $units ) {
break;
}
// Get time units from a fallback language
$units = self::loadLanguage( $fallback );
}
return $units;
}
/**
* Load time units localized for a particular language. Helper function for getUnits.
*
* @param string $code The language to return the list in
* @return array an associative array of time unit codes and localized time units
*/
private static function loadLanguage( $code ) {
if ( !isset( self::$cache[$code] ) ) {
self::$cache[$code] = [];
/* Load override for wrong or missing entries in cldr */
$override = __DIR__ . '/../LocalNames/' . self::getOverrideFileName( $code );
if ( Language::isValidBuiltInCode( $code ) && file_exists( $override ) ) {
$timeUnits = false;
require $override;
// @phan-suppress-next-line PhanImpossibleCondition
if ( is_array( $timeUnits ) ) {
self::$cache[$code] = $timeUnits;
}
}
$filename = __DIR__ . '/../CldrNames/' . self::getFileName( $code );
if ( Language::isValidBuiltInCode( $code ) && file_exists( $filename ) ) {
$timeUnits = false;
require $filename;
// @phan-suppress-next-line PhanImpossibleCondition
if ( is_array( $timeUnits ) ) {
self::$cache[$code] = self::$cache[$code] + $timeUnits;
}
} else {
wfDebug( __METHOD__ . ": Unable to load time units for $filename\n" );
}
}
return self::$cache[$code];
}
/**
* Handler for GetHumanTimestamp hook.
* Converts the given time into a human-friendly relative format, for
* example, '6 days ago', 'In 10 months'.
*
* @param string &$output The output timestamp
* @param MWTimestamp $timestamp The current (user-adjusted) timestamp
* @param MWTimestamp $relativeTo The relative (user-adjusted) timestamp
* @param User $user User whose preferences are being used to make timestamp
* @param Language $lang Language that will be used to render the timestamp
* @return bool False means the timestamp was overridden so stop further
* processing. True means the timestamp was not overridden.
*/
public static function onGetHumanTimestamp( &$output, $timestamp, $relativeTo, $user, $lang ) {
// Map PHP's DateInterval property codes to CLDR unit names.
$units = [
's' => 'second',
'i' => 'minute',
'h' => 'hour',
'd' => 'day',
'm' => 'month',
'y' => 'year',
];
// Get the difference between the two timestamps (as a DateInterval object).
$timeDifference = $timestamp->diff( $relativeTo );
// Figure out if the timestamp is in the future or the past.
if ( $timeDifference->invert ) {
$tense = 'future';
} else {
$tense = 'past';
}
// Figure out which unit (days, months, etc.) it makes sense to display
// the timestamp in, and get the number of that unit to use.
$unit = null;
$number = 0;
foreach ( $units as $code => $testUnit ) {
$testNumber = (int)$timeDifference->format( '%' . $code );
if ( $testNumber > 0 ) {
$unit = $testUnit;
$number = $testNumber;
}
}
// If it occurred less than 1 second ago, output 'just now' message.
if ( !$unit || !$number ) {
$output = wfMessage( 'just-now' )->inLanguage( $lang )->text();
return false;
}
// Get the CLDR time unit strings for the user's language.
// If no strings are returned, abandon the timestamp override.
$timeUnits = self::getUnits( $lang->getCode() );
if ( !$timeUnits ) {
return true;
}
// Figure out which grammatical number to use.
// If the template doesn't exist, fall back to 'other' as the default.
$grammaticalNumber = $lang->getPluralRuleType( $number );
$timeUnitKey = "{$unit}-{$tense}-{$grammaticalNumber}";
if ( !isset( $timeUnits[$timeUnitKey] ) ) {
$timeUnitKey = "{$unit}-{$tense}-other";
}
// Not all languages have translations for everything
if ( !isset( $timeUnits[$timeUnitKey] ) ) {
return true;
}
// Select the appropriate template for the timestamp.
$timeUnit = $timeUnits[$timeUnitKey];
// Replace the placeholder with the number.
$output = str_replace( '{0}', $lang->formatNum( $number ), $timeUnit );
return false;
}
}
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