LanguageTag: added isCountry() & getCountry()

src/LanguageTag.php

@@ -60,6 +60,27 @@ public function getLang()
 		}
 
 
+		/**
+		 * @param  string $country
+		 * @return bool
+		 */
+		public function isCountry($country)
+		{
+			return substr_compare($this->tag, strtoupper($country), 3, 2, FALSE) === 0;
+		}
+
+
+		/**
+		 * @return non-empty-string
+		 */
+		public function getCountry()
+		{
+			$country = substr($this->tag, 3, 2);
+			assert($country !== '');
+			return $country;
+		}
+
+
 		/**
 		 * @return non-empty-string
 		 */

tests/Translator/LanguageTag.phpt

@@ -9,13 +9,21 @@ require __DIR__ . '/../bootstrap.php';
 test('valid', function () {
 	$tag = new LanguageTag('cs-CZ');
 	Assert::same('cs-CZ', $tag->toString());
+	Assert::same('cs', $tag->getLang());
 	Assert::true($tag->isLang('cs'));
 	Assert::false($tag->isLang('en'));
+	Assert::same('CZ', $tag->getCountry());
+	Assert::true($tag->isCountry('CZ'));
+	Assert::false($tag->isCountry('US'));
 
 	$tag = new LanguageTag('en-US');
 	Assert::same('en-US', $tag->toString());
+	Assert::same('en', $tag->getLang());
 	Assert::false($tag->isLang('cs'));
 	Assert::true($tag->isLang('en'));
+	Assert::same('US', $tag->getCountry());
+	Assert::false($tag->isCountry('cz'));
+	Assert::true($tag->isCountry('us'));
 });