Use Task.createDueDate in deadline control set

Closes #298

src/main/java/com/todoroo/astrid/data/Task.java

@@ -18,12 +18,14 @@ import com.todoroo.andlib.data.Table;
 import com.todoroo.andlib.data.TodorooCursor;
 import com.todoroo.andlib.utility.DateUtilities;
 
+import org.joda.time.DateTime;
 import org.tasks.BuildConfig;
 import org.tasks.R;
 
 import java.util.Date;
 
 import static org.tasks.date.DateTimeUtils.newDate;
+import static org.tasks.date.DateTimeUtils.newDateTime;
 
 /**
  * Data Model which represents a task users need to accomplish.
@@ -314,15 +316,16 @@ public class Task extends RemoteModel {
             return date;
         }
 
-        Date dueDate = newDate(date / 1000L * 1000L); // get rid of millis
+        DateTime dueDate = newDateTime(date).withMillisOfSecond(0);
         if(setting != URGENCY_SPECIFIC_DAY_TIME) {
-            dueDate.setHours(12);
-            dueDate.setMinutes(0);
-            dueDate.setSeconds(0); // Seconds == 0 means no due time
+            dueDate = dueDate
+                    .withHourOfDay(12)
+                    .withMinuteOfHour(0)
+                    .withSecondOfMinute(0); // Seconds == 0 means no due time
         } else {
-            dueDate.setSeconds(1); // Seconds > 0 means due time exists
+            dueDate = dueDate.withSecondOfMinute(1); // Seconds > 0 means due time exists
         }
-        return dueDate.getTime();
+        return dueDate.getMillis();
     }
 
     /**

src/main/java/org/tasks/ui/DeadlineControlSet.java

@@ -423,18 +423,13 @@ public class DeadlineControlSet extends TaskEditControlSetBase {
 
     @Override
     protected void writeToModelAfterInitialized(Task task) {
-        DateTime dateTime = newDateTime(date);
-        if (time >= 0) {
-            dateTime = dateTime
-                    .withMillisOfDay(time)
-                    .withSecondOfMinute(1)
-                    .withMillisOfSecond(0);
-        }
-        long millis = dateTime.getMillis();
-        if (millis != task.getDueDate()) {
+        long dueDate = time >= 0
+                ? Task.createDueDate(Task.URGENCY_SPECIFIC_DAY_TIME, newDateTime(date).withMillisOfDay(time).getMillis())
+                : Task.createDueDate(Task.URGENCY_SPECIFIC_DAY, date);
+        if (dueDate != task.getDueDate()) {
             task.setReminderSnooze(0L);
         }
-        task.setDueDate(millis);
+        task.setDueDate(dueDate);
     }
 
     @Override