3 files changed, 63 insertions, 6 deletions
diff --git a/Swiften/Base/DateTime.cpp b/Swiften/Base/DateTime.cpp
index 1120938..fae26d4 100644
--- a/Swiften/Base/DateTime.cpp
+++ b/Swiften/Base/DateTime.cpp
@@ -7,19 +7,28 @@
 #include <Swiften/Base/DateTime.h>
 
 #include <locale>
-
 #include <boost/date_time/time_facet.hpp>
+#include <boost/date_time/local_time/local_time.hpp>
 #include <boost/date_time/posix_time/posix_time.hpp>
 
+#include <Swiften/Base/String.h>
+
 namespace Swift {
 
 boost::posix_time::ptime stringToDateTime(const std::string& string) {
-	static std::locale locale(std::locale::classic(), new boost::posix_time::time_input_facet("%Y-%m-%d %H:%M:%S%F%Q"));
+	static std::locale locale(std::locale::classic(), new boost::local_time::local_time_input_facet("%Y-%m-%d %H:%M:%S%F%ZP"));
 	std::istringstream stream(string); 
 	stream.imbue(locale);
-	boost::posix_time::ptime result(boost::posix_time::not_a_date_time);
+	boost::local_time::local_date_time result(boost::date_time::not_a_date_time);
 	stream >> result;
-	return result;
+	return result.utc_time();
+}
+
+std::string dateTimeToString(const boost::posix_time::ptime& time) {
+	std::string stampString = std::string(boost::posix_time::to_iso_extended_string(time));
+	String::replaceAll(stampString, ',', ".");
+	stampString += "Z";
+	return stampString;
 }
 
 }
diff --git a/Swiften/Base/DateTime.h b/Swiften/Base/DateTime.h
index 309ee56..2407ddc 100644
--- a/Swiften/Base/DateTime.h
+++ b/Swiften/Base/DateTime.h
@@ -10,8 +10,13 @@
 
 namespace Swift {
 	/**
-	 * Converts a date formatted according to XEP-0082 into a time
-	 * object.
+	 * Converts a date formatted according to XEP-0082 into a ptime
+	 * object (in UTC).
 	 */
 	boost::posix_time::ptime stringToDateTime(const std::string& string);
+
+	/**
+	 * Converts a UTC ptime object to a XEP-0082 formatted string.
+	 */
+	std::string dateTimeToString(const boost::posix_time::ptime& time);
 }
diff --git a/Swiften/Base/UnitTest/DateTimeTest.cpp b/Swiften/Base/UnitTest/DateTimeTest.cpp
new file mode 100644
index 0000000..8c3903a
--- /dev/null
+++ b/Swiften/Base/UnitTest/DateTimeTest.cpp
@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2011 Remko Tronçon
+ * Licensed under the GNU General Public License v3.
+ * See Documentation/Licenses/GPLv3.txt for more information.
+ */
+
+#include <cppunit/extensions/HelperMacros.h>
+#include <cppunit/extensions/TestFactoryRegistry.h>
+#include <string>
+#include <boost/date_time/posix_time/posix_time.hpp>
+
+#include <Swiften/Base/DateTime.h>
+
+using namespace Swift;
+
+class DateTimeTest : public CppUnit::TestFixture {
+		CPPUNIT_TEST_SUITE(DateTimeTest);
+		CPPUNIT_TEST(testStringToDateTime_UTC);
+		CPPUNIT_TEST(testStringToDateTime_WithTimezone);
+		CPPUNIT_TEST(testDateTimeToString);
+		CPPUNIT_TEST_SUITE_END();
+
+	public:
+		void testStringToDateTime_UTC() {
+			boost::posix_time::ptime time = stringToDateTime("1969-07-21T02:56:15Z");
+
+			CPPUNIT_ASSERT_EQUAL(std::string("1969-07-21T02:56:15"), boost::posix_time::to_iso_extended_string(time));
+		}
+
+		void testStringToDateTime_WithTimezone() {
+			boost::posix_time::ptime time = stringToDateTime("1969-07-20T21:56:15-05:00");
+
+			CPPUNIT_ASSERT_EQUAL(std::string("1969-07-21T02:56:15"), boost::posix_time::to_iso_extended_string(time));
+		}
+
+		void testDateTimeToString() {
+			boost::posix_time::ptime time = stringToDateTime("1969-07-20T21:56:15-05:00");
+
+			CPPUNIT_ASSERT_EQUAL(std::string("1969-07-21T02:56:15Z"), dateTimeToString(time));
+		}
+};
+
+CPPUNIT_TEST_SUITE_REGISTRATION(DateTimeTest);