Differential D13142 Diff 31774 src/infrastructure/internationalization/scope/PhabricatorLocaleScopeGuard.php

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				<?php

				/**
				* Change the effective locale for the lifetime of this guard.
				*
				* Use @{method:PhabricatorEnv::beginScopedLocale} to acquire a guard.
				* Guards are released when they exit scope.
				*/
				final class PhabricatorLocaleScopeGuard
				extends Phobject {

				private static $stack = array();
				private $key;
				private $destroyed;

				public function __construct($code) {
				// If this is the first time we're building a guard, push the default
				// locale onto the bottom of the stack. We'll never remove it.
				if (empty(self::$stack)) {
				self::$stack[] = PhabricatorEnv::getLocaleCode();
				}

				// If there's no locale, use the server default locale.
				if (!$code) {
				$code = self::$stack[0];
				}

				// Push this new locale onto the stack and set it as the active locale.
				// We keep track of which key this guard owns, in case guards are destroyed
				// out-of-order.
				self::$stack[] = $code;
				$this->key = last_key(self::$stack);

				PhabricatorEnv::setLocaleCode($code);
				}

				public function __destruct() {
				if ($this->destroyed) {
				return;
				}
				$this->destroyed = true;

				// Remove this locale from the stack and set the new active locale. Usually,
				// we're the last item on the stack, so this shortens the stack by one item
				// and sets the locale underneath. However, it's possible that guards are
				// being destroyed out of order, so we might just be removing an item
				// somewhere in the middle of the stack. In this case, we won't actually
				// change the locale, just set it to its current value again.

				unset(self::$stack[$this->key]);
				PhabricatorEnv::setLocaleCode(end(self::$stack));
				}

				}