Apply tz offset when converting to ical4j Date

app/src/main/java/com/todoroo/astrid/repeats/RepeatTaskHelper.kt

@@ -205,7 +205,7 @@ class RepeatTaskHelper @Inject constructor(
             return if (task.hasDueTime()) {
                 startDate.toDateTime()
             } else {
-                Date(startDate.millis + startDate.offset)
+                startDate.toDate()
             }
         }
 

app/src/main/java/org/tasks/caldav/iCalendar.kt

@@ -32,6 +32,7 @@ import org.tasks.repeats.RecurrenceUtils.newRecur
 import org.tasks.time.DateTime.UTC
 import org.tasks.time.DateTimeUtils.startOfDay
 import org.tasks.time.DateTimeUtils.startOfMinute
+import org.tasks.time.DateTimeUtils.toDate
 import timber.log.Timber
 import java.io.ByteArrayOutputStream
 import java.io.StringReader
@@ -339,12 +340,12 @@ class iCalendar @Inject constructor(
             }
             due = if (dueDate > 0) {
                 startDate = min(dueDate, startDate)
-                Due(if (allDay) getDate(dueDate) else getDateTime(dueDate))
+                Due(if (allDay) dueDate.toDate() else getDateTime(dueDate))
             } else {
                 null
             }
             dtStart = if (startDate > 0) {
-                DtStart(if (allDay) getDate(startDate) else getDateTime(startDate))
+                DtStart(if (allDay) startDate.toDate() else getDateTime(startDate))
             } else {
                 null
             }
@@ -388,10 +389,6 @@ class iCalendar @Inject constructor(
             snooze = task.reminderSnooze
         }
 
-        private fun getDate(timestamp: Long): Date {
-            return Date(timestamp + newDateTime(timestamp).offset)
-        }
-
         private fun getDateTime(timestamp: Long): DateTime {
             val tz = ical4jTimeZone(TimeZone.getDefault().id)
             val dateTime = DateTime(if (tz != null) timestamp else org.tasks.time.DateTime(timestamp).toUTC().millis)

app/src/main/java/org/tasks/time/DateTime.java

@@ -1,14 +1,8 @@
 package org.tasks.time;
 
-import static com.todoroo.astrid.core.SortHelper.APPLE_EPOCH;
-import static java.util.Calendar.FRIDAY;
-import static java.util.Calendar.MONDAY;
-import static java.util.Calendar.SATURDAY;
-import static java.util.Calendar.SUNDAY;
-import static java.util.Calendar.THURSDAY;
-import static java.util.Calendar.TUESDAY;
-import static java.util.Calendar.WEDNESDAY;
-import static org.tasks.time.DateTimeUtils.currentTimeMillis;
+import net.fortuna.ical4j.model.WeekDay;
+
+import org.tasks.locale.Locale;
 
 import java.text.SimpleDateFormat;
 import java.time.LocalDate;
@@ -19,8 +13,16 @@ import java.util.GregorianCalendar;
 import java.util.Objects;
 import java.util.TimeZone;
 import java.util.concurrent.TimeUnit;
-import net.fortuna.ical4j.model.WeekDay;
-import org.tasks.locale.Locale;
+
+import static com.todoroo.astrid.core.SortHelper.APPLE_EPOCH;
+import static java.util.Calendar.FRIDAY;
+import static java.util.Calendar.MONDAY;
+import static java.util.Calendar.SATURDAY;
+import static java.util.Calendar.SUNDAY;
+import static java.util.Calendar.THURSDAY;
+import static java.util.Calendar.TUESDAY;
+import static java.util.Calendar.WEDNESDAY;
+import static org.tasks.time.DateTimeUtils.currentTimeMillis;
 
 public class DateTime {
 
@@ -357,7 +359,7 @@ public class DateTime {
   }
 
   public net.fortuna.ical4j.model.Date toDate() {
-    return timestamp == 0 ? null : new net.fortuna.ical4j.model.Date(timestamp);
+    return timestamp == 0 ? null : new net.fortuna.ical4j.model.Date(timestamp + getOffset());
   }
 
   public LocalDate toLocalDate() {

app/src/main/java/org/tasks/time/DateTimeUtils.kt

@@ -40,4 +40,6 @@ object DateTimeUtils {
     fun Long.startOfMinute(): Long = if (this > 0) toDateTime().startOfMinute().millis else 0
 
     fun Long.millisOfDay(): Int = if (this > 0) toDateTime().millisOfDay else 0
+
+    fun Long.toDate(): net.fortuna.ical4j.model.Date? = this.toDateTime().toDate()
 }