Make the day start at 3am instead of midnight

Closes #50

uhabits-android/src/main/java/org/isoron/uhabits/utils/DatabaseUtils.java

@@ -92,7 +92,7 @@ public abstract class DatabaseUtils
         throws IOException
     {
         SimpleDateFormat dateFormat = DateFormats.getBackupDateFormat();
-        String date = dateFormat.format(DateUtils.getLocalTime());
+        String date = dateFormat.format(DateUtils.getStartOfToday());
         String format = "%s/Loop Habits Backup %s.db";
         String filename = String.format(format, dir.getAbsolutePath(), date);
 

uhabits-core/src/main/java/org/isoron/uhabits/core/models/Timestamp.java

@@ -23,8 +23,8 @@ import org.apache.commons.lang3.builder.*;
 
 import java.util.*;
 
-import static java.util.Calendar.DAY_OF_WEEK;
-import static org.isoron.uhabits.core.utils.StringUtils.defaultToStringStyle;
+import static java.util.Calendar.*;
+import static org.isoron.uhabits.core.utils.StringUtils.*;
 
 public final class Timestamp
 {

uhabits-core/src/main/java/org/isoron/uhabits/core/ui/screens/habits/list/HabitCardListCache.java

@@ -304,8 +304,7 @@ public class HabitCardListCache implements CommandRunner.Listener
             newData.copyScoresFrom(data);
             newData.copyCheckmarksFrom(data);
 
-            Timestamp dateTo = new Timestamp(
-                DateUtils.getStartOfDay(DateUtils.getLocalTime()));
+            Timestamp dateTo = DateUtils.getToday();
             Timestamp dateFrom = dateTo.minus(checkmarkCount - 1);
 
             runner.publishProgress(this, -1);

uhabits-core/src/main/java/org/isoron/uhabits/core/utils/DateUtils.java

@@ -29,14 +29,25 @@ import static java.util.Calendar.*;
 
 public abstract class DateUtils
 {
+
     private static Long fixedLocalTime = null;
 
     private static TimeZone fixedTimeZone = null;
 
+    /**
+     * Time of the day when the new day starts.
+     */
+    public static final int NEW_DAY_OFFSET = 3;
+
     /**
      * Number of milliseconds in one day.
      */
-    public static long DAY_LENGTH = 24 * 60 * 60 * 1000;
+    public static final long DAY_LENGTH = 24 * 60 * 60 * 1000;
+
+    /**
+     * Number of milliseconds in one hour.
+     */
+    public static final long HOUR_LENGTH = 60 * 60 * 1000;
 
     public static long applyTimezone(long localTimestamp)
     {
@@ -147,12 +158,13 @@ public abstract class DateUtils
 
     public static long getStartOfToday()
     {
-        return getStartOfDay(DateUtils.getLocalTime());
+        return getStartOfDay(getLocalTime() - NEW_DAY_OFFSET * HOUR_LENGTH);
     }
 
     public static long millisecondsUntilTomorrow()
     {
-        return getStartOfToday() + DAY_LENGTH - getLocalTime();
+        return getStartOfToday() + DAY_LENGTH -
+               (getLocalTime() - NEW_DAY_OFFSET * HOUR_LENGTH);
     }
 
     public static GregorianCalendar getStartOfTodayCalendar()

uhabits-core/src/test/java/org/isoron/uhabits/core/BaseUnitTest.java

@@ -95,7 +95,14 @@ public class BaseUnitTest
     public long timestamp(int year, int month, int day)
     {
         GregorianCalendar cal = DateUtils.getStartOfTodayCalendar();
-        cal.set(year, month, day);
+        cal.set(year, month, day, 0, 0, 0);
+        return cal.getTimeInMillis();
+    }
+
+    public long timestamp(int year, int month, int day, int hour, int minute)
+    {
+        GregorianCalendar cal = DateUtils.getStartOfTodayCalendar();
+        cal.set(year, month, day, hour, minute);
         return cal.getTimeInMillis();
     }
 

uhabits-core/src/test/java/org/isoron/uhabits/core/models/RepetitionListTest.java

@@ -27,6 +27,7 @@ import org.junit.*;
 
 import java.util.*;
 
+import static java.util.Calendar.*;
 import static junit.framework.TestCase.assertFalse;
 import static org.hamcrest.MatcherAssert.assertThat;
 import static org.hamcrest.core.IsEqual.*;
@@ -101,23 +102,20 @@ public class RepetitionListTest extends BaseUnitTest
         habit = fixtures.createEmptyHabit();
         reps = habit.getRepetitions();
 
-        Random random = new Random();
+        Random random = new Random(123L);
         Integer weekdayCount[][] = new Integer[12][7];
         Integer monthCount[] = new Integer[12];
 
         Arrays.fill(monthCount, 0);
-        for (Integer row[] : weekdayCount)
-            Arrays.fill(row, 0);
-
+        for (Integer row[] : weekdayCount) Arrays.fill(row, 0);
         GregorianCalendar day = DateUtils.getStartOfTodayCalendar();
 
         // Sets the current date to the end of November
-        day.set(2015, 10, 30);
+        day.set(2015, NOVEMBER, 30, 12, 0, 0);
         DateUtils.setFixedLocalTime(day.getTimeInMillis());
 
         // Add repetitions randomly from January to December
-        // Leaves the month of March empty, to check that it returns null
-        day.set(2015, 0, 1);
+        day.set(2015, JANUARY, 1, 0, 0, 0);
         for (int i = 0; i < 365; i++)
         {
             if (random.nextBoolean())
@@ -125,34 +123,34 @@ public class RepetitionListTest extends BaseUnitTest
                 int month = day.get(Calendar.MONTH);
                 int week = day.get(Calendar.DAY_OF_WEEK) % 7;
 
-                if (month != 2)
-                {
-                    if (month <= 10)
-                    {
-                        weekdayCount[month][week]++;
-                        monthCount[month]++;
-                    }
-                    reps.toggle(new Timestamp(day));
-                }
+                // Leave the month of March empty, to check that it returns null
+                if (month == MARCH) continue;
+
+                reps.toggle(new Timestamp(day));
+
+                // Repetitions in December should not be counted
+                if (month == DECEMBER) continue;
+
+                weekdayCount[month][week]++;
+                monthCount[month]++;
             }
 
             day.add(Calendar.DAY_OF_YEAR, 1);
         }
 
-        HashMap<Timestamp, Integer[]> freq =
-            reps.getWeekdayFrequency();
+        HashMap<Timestamp, Integer[]> freq = reps.getWeekdayFrequency();
 
         // Repetitions until November should be counted correctly
         for (int month = 0; month < 11; month++)
         {
-            day.set(2015, month, 1);
+            day.set(2015, month, 1, 0, 0, 0);
             Integer actualCount[] = freq.get(new Timestamp(day));
             if (monthCount[month] == 0) assertThat(actualCount, equalTo(null));
             else assertThat(actualCount, equalTo(weekdayCount[month]));
         }
 
         // Repetitions in December should be discarded
-        day.set(2015, 11, 1);
+        day.set(2015, DECEMBER, 1, 0, 0, 0);
         assertThat(freq.get(new Timestamp(day)), equalTo(null));
     }
 

uhabits-core/src/test/java/org/isoron/uhabits/core/utils/DateUtilsTest.java

@@ -135,4 +135,15 @@ public class DateUtilsTest extends BaseUnitTest
         assertThat(DateUtils.truncate(field, t1), equalTo(expected));
         assertThat(DateUtils.truncate(field, t2), equalTo(expected));
     }
+
+    @Test
+    public void testMillisecondsUntilTomorrow() throws Exception
+    {
+        DateUtils.setFixedLocalTime(timestamp(2017, JANUARY, 1, 2, 59));
+        assertThat(DateUtils.millisecondsUntilTomorrow(), equalTo(60000L));
+
+        DateUtils.setFixedLocalTime(timestamp(2017, JANUARY, 1, 23, 0));
+        assertThat(DateUtils.millisecondsUntilTomorrow(), equalTo(14400000L));
+
+    }
 }