Add ability to construct TimeAgo with a translation code

Author: Zsolt Gál

spec/Technodelight/TimeAgoSpec.php

@@ -25,4 +25,10 @@ function it_calculates_a_difference_between_two_dates(Translator $translator)
 
         $this->inWords();
     }
+
+    function it_could_be_constructed_with_language_code()
+    {
+        $this->beConstructedWithTranslation(new DateTime('-1 minute'), 'nl');
+        $this->inWords()->shouldReturn('1 minuut geleden');
+    }
 }

src/Technodelight/TimeAgo.php

@@ -2,8 +2,8 @@
 
 namespace Technodelight;
 
+use Technodelight\TimeAgo\TranslationLoader;
 use Technodelight\TimeAgo\Translator;
-use \DateTime;
 
 class TimeAgo
 {
@@ -16,15 +16,38 @@ class TimeAgo
      */
     private $translator;
 
-    public function __construct(DateTime $dateTime, Translator $translator = null)
+    /**
+     * @param DateTime        $dateTime
+     * @param Translator|null $translator
+     */
+    public function __construct(\DateTime $dateTime, Translator $translator = null)
     {
         $this->dateTime = $dateTime;
         $this->translator = $translator ?: new Translator;
     }
 
-    public function inWords(DateTime $now = null)
+    /**
+     * Instantiate TimeAgo with the desired built-in translation
+     *
+     * @param  DateTime $dateTime
+     * @param  string   $languageCode
+     *
+     * @return TimeAgo
+     */
+    public static function withTranslation(\DateTime $dateTime, $languageCode)
+    {
+        $translationLoader = new TranslationLoader;
+        return new self($dateTime, new Translator($translationLoader->load($languageCode)));
+    }
+
+    /**
+     * @param  DateTime|null $now accepts a reference date
+     *
+     * @return string
+     */
+    public function inWords(\DateTime $now = null)
     {
-        $now = $now ?: new DateTime;
+        $now = $now ?: new \DateTime;
         return $this->translator->translate(
             $now->getTimestamp() - $this->dateTime->getTimestamp()
         );