Implemented json serialize for the time library

src/Utility/Time.php

@@ -16,13 +16,14 @@
 
 use Carbon\Carbon;
 use IntlDateFormatter;
+use JsonSerializable;
 
 /**
  * Extends the built-in DateTime class to provide handy methods and locale-aware
  * formatting helpers
  *
  */
-class Time extends Carbon {
+class Time extends Carbon implements JsonSerializable {
 
 /**
  * The format to use when formatting a time using `Cake\Utility\Time::i18nFormat()`
@@ -637,4 +638,13 @@ public static function setToStringFormat($format) {
 		static::$_toStringFormat = $format;
 	}
 
+/**
+ * Returns a string that should be serialized when converting this object to json
+ *
+ * @return string
+ */
+	public function jsonSerialize() {
+		return $this->format(static::ISO8601);
+	}
+
 }

tests/TestCase/Utility/TimeTest.php

@@ -566,6 +566,16 @@ public function testDiffForHumans() {
 		$this->assertEquals('1 week', $time->diffForHumans($other));
 	}
 
+/**
+ * Tests encoding a Time object as json
+ *
+ * @return void
+ */
+	public function testJsonEnconde() {
+		$time = new Time('2014-04-20 10:10:10');
+		$this->assertEquals('"2014-04-20T10:10:10+0000"', json_encode($time));
+	}
+
 /**
  * Cusotm assert to allow for variation in the version of the intl library, where
  * some translations contain a few extra commas.