Improve performance of toggleCheckmark

app/src/androidTest/java/org/isoron/uhabits/unit/models/RepetitionListTest.java

@@ -25,6 +25,7 @@ import android.test.suitebuilder.annotation.SmallTest;
 import org.isoron.uhabits.BaseTest;
 import org.isoron.uhabits.helpers.DateHelper;
 import org.isoron.uhabits.models.Habit;
+import org.isoron.uhabits.models.Repetition;
 import org.isoron.uhabits.unit.HabitFixtures;
 import org.junit.After;
 import org.junit.Before;
@@ -37,6 +38,7 @@ import java.util.GregorianCalendar;
 import java.util.HashMap;
 import java.util.Random;
 
+import static junit.framework.Assert.assertFalse;
 import static org.hamcrest.MatcherAssert.assertThat;
 import static org.hamcrest.Matchers.equalTo;
 
@@ -174,4 +176,16 @@ public class RepetitionListTest extends BaseTest
         from = to - 5 * DateHelper.millisecondsInOneDay;
         assertThat(habit.repetitions.count(from, to), equalTo(3));
     }
+
+    @Test
+    public void getOldest()
+    {
+        long expectedOldestTimestamp = DateHelper.getStartOfToday() - 9 * DateHelper.millisecondsInOneDay;
+
+        assertThat(habit.repetitions.getOldestTimestamp(), equalTo(expectedOldestTimestamp));
+
+        Repetition oldest = habit.repetitions.getOldest();
+        assertFalse(oldest == null);
+        assertThat(oldest.timestamp, equalTo(expectedOldestTimestamp));
+    }
 }

app/src/main/java/org/isoron/uhabits/helpers/DatabaseHelper.java

@@ -20,11 +20,13 @@
 package org.isoron.uhabits.helpers;
 
 import android.content.Context;
+import android.database.Cursor;
 import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
 import android.support.v4.content.ContextCompat;
 
 import com.activeandroid.ActiveAndroid;
+import com.activeandroid.Cache;
 import com.activeandroid.Configuration;
 
 import org.isoron.uhabits.BuildConfig;
@@ -163,4 +165,20 @@ public class DatabaseHelper
 
         ActiveAndroid.initialize(dbConfig);
     }
+
+    public static long longQuery(String query, String args[])
+    {
+        Cursor c = null;
+
+        try
+        {
+            c = Cache.openDatabase().rawQuery(query, args);
+            if (!c.moveToFirst()) return 0;
+            return c.getLong(0);
+        }
+        finally
+        {
+            if(c != null) c.close();
+        }
+    }
 }

app/src/main/java/org/isoron/uhabits/models/CheckmarkList.java

@@ -21,10 +21,10 @@ package org.isoron.uhabits.models;
 
 import android.database.Cursor;
 import android.database.sqlite.SQLiteDatabase;
+import android.database.sqlite.SQLiteStatement;
 import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
 
-import com.activeandroid.ActiveAndroid;
 import com.activeandroid.Cache;
 import com.activeandroid.query.Delete;
 import com.activeandroid.query.Select;
@@ -134,10 +134,9 @@ public class CheckmarkList
      */
     protected void computeAll()
     {
-        Repetition oldestRep = habit.repetitions.getOldest();
-        if(oldestRep == null) return;
+        long fromTimestamp = habit.repetitions.getOldestTimestamp();
+        if(fromTimestamp == 0) return;
 
-        Long fromTimestamp = oldestRep.timestamp;
         Long toTimestamp = DateHelper.getStartOfToday();
 
         compute(fromTimestamp, toTimestamp);
@@ -150,9 +149,9 @@ public class CheckmarkList
      * @param from timestamp for the beginning of the interval
      * @param to timestamp for the end of the interval
      */
-    protected void compute(long from, long to)
+    protected void compute(long from, final long to)
     {
-        long day = DateHelper.millisecondsInOneDay;
+        final long day = DateHelper.millisecondsInOneDay;
 
         Checkmark newestCheckmark = findNewest();
         if(newestCheckmark != null)
@@ -165,9 +164,9 @@ public class CheckmarkList
                 .selectFromTo(fromExtended, to)
                 .execute();
 
-        int nDays = (int) ((to - from) / day) + 1;
+        final int nDays = (int) ((to - from) / day) + 1;
         int nDaysExtended = (int) ((to - fromExtended) / day) + 1;
-        int checks[] = new int[nDaysExtended];
+        final int checks[] = new int[nDaysExtended];
 
         for (Repetition rep : reps)
         {
@@ -187,24 +186,38 @@ public class CheckmarkList
                     checks[i] = Checkmark.CHECKED_IMPLICITLY;
         }
 
-        ActiveAndroid.beginTransaction();
+
+        long timestamps[] = new long[nDays];
+        for (int i = 0; i < nDays; i++)
+            timestamps[i] = to - i * day;
+
+        insert(timestamps, checks);
+    }
+
+    private void insert(long timestamps[], int values[])
+    {
+        String query = "insert into Checkmarks(habit, timestamp, value) values (?,?,?)";
+
+        SQLiteDatabase db = Cache.openDatabase();
+        db.beginTransaction();
 
         try
         {
-            for (int i = 0; i < nDays; i++)
+            SQLiteStatement statement = db.compileStatement(query);
+            statement.bindString(1, habit.getId().toString());
+
+            for (int i = 0; i < timestamps.length; i++)
             {
-                Checkmark c = new Checkmark();
-                c.habit = habit;
-                c.timestamp = to - i * day;
-                c.value = checks[i];
-                c.save();
+                statement.bindLong(2, timestamps[i]);
+                statement.bindLong(3, values[i]);
+                statement.execute();
             }
 
-            ActiveAndroid.setTransactionSuccessful();
+            db.setTransactionSuccessful();
         }
         finally
         {
-            ActiveAndroid.endTransaction();
+            db.endTransaction();
         }
     }
 

app/src/main/java/org/isoron/uhabits/models/RepetitionList.java

@@ -28,7 +28,9 @@ import com.activeandroid.Cache;
 import com.activeandroid.query.Delete;
 import com.activeandroid.query.From;
 import com.activeandroid.query.Select;
+import com.activeandroid.util.SQLiteUtils;
 
+import org.isoron.uhabits.helpers.DatabaseHelper;
 import org.isoron.uhabits.helpers.DateHelper;
 
 import java.util.Arrays;
@@ -96,22 +98,21 @@ public class RepetitionList
         timestamp = DateHelper.getStartOfDay(timestamp);
 
         if (contains(timestamp))
-        {
             delete(timestamp);
-        }
         else
-        {
-            Repetition rep = new Repetition();
-            rep.habit = habit;
-            rep.timestamp = timestamp;
-            rep.save();
-        }
+            insert(timestamp);
 
         habit.scores.invalidateNewerThan(timestamp);
         habit.checkmarks.deleteNewerThan(timestamp);
         habit.streaks.deleteNewerThan(timestamp);
     }
 
+    private void insert(long timestamp)
+    {
+        String[] args = { habit.getId().toString(), Long.toString(timestamp) };
+        SQLiteUtils.execSql("insert into Repetitions(habit, timestamp) values (?,?)", args);
+    }
+
     /**
      * Returns the oldest repetition for the habit. If there is no repetition, returns null.
      * Repetitions in the future are discarded.
@@ -124,6 +125,21 @@ public class RepetitionList
         return (Repetition) select().limit(1).executeSingle();
     }
 
+    /**
+     * Returns the timestamp of the oldest repetition. If there are no repetitions, returns zero.
+     * Repetitions in the future are discarded.
+     *
+     * @return timestamp of the oldest repetition
+     */
+    public long getOldestTimestamp()
+    {
+        String[] args = { habit.getId().toString(), Long.toString(DateHelper.getStartOfToday()) };
+        String query = "select timestamp from Repetitions where habit = ? and timestamp <= ? " +
+                "order by timestamp limit 1";
+
+        return DatabaseHelper.longQuery(query, args);
+    }
+
     /**
      * Returns the total number of repetitions for each month, from the first repetition until
      * today, grouped by day of week. The repetitions are returned in a HashMap. The key is the

app/src/main/java/org/isoron/uhabits/models/ScoreList.java

@@ -21,6 +21,7 @@ package org.isoron.uhabits.models;
 
 import android.database.Cursor;
 import android.database.sqlite.SQLiteDatabase;
+import android.database.sqlite.SQLiteStatement;
 import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
 
@@ -28,8 +29,8 @@ import com.activeandroid.Cache;
 import com.activeandroid.query.Delete;
 import com.activeandroid.query.From;
 import com.activeandroid.query.Select;
+import com.activeandroid.util.SQLiteUtils;
 
-import org.isoron.uhabits.helpers.DatabaseHelper;
 import org.isoron.uhabits.helpers.DateHelper;
 
 import java.io.IOException;
@@ -104,10 +105,9 @@ public class ScoreList
      */
     private void computeAll()
     {
-        Repetition oldestRep = habit.repetitions.getOldest();
-        if(oldestRep == null) return;
+        long fromTimestamp = habit.repetitions.getOldestTimestamp();
+        if(fromTimestamp == 0) return;
 
-        long fromTimestamp = oldestRep.timestamp;
         long toTimestamp = DateHelper.getStartOfToday();
         compute(fromTimestamp, toTimestamp);
     }
@@ -136,28 +136,51 @@ public class ScoreList
             from = newestScore.timestamp + day;
 
         final int checkmarkValues[] = habit.checkmarks.getValues(from, to);
-        final int firstScore = newestScoreValue;
         final long beginning = from;
 
-        DatabaseHelper.executeAsTransaction(new DatabaseHelper.Command()
-        {
-            @Override
-            public void execute()
-            {
-                int lastScore = firstScore;
+
+        int lastScore = newestScoreValue;
+        int size = checkmarkValues.length;
+
+        long timestamps[] = new long[size];
+        long values[] = new long[size];
 
         for (int i = 0; i < checkmarkValues.length; i++)
         {
             int checkmarkValue = checkmarkValues[checkmarkValues.length - i - 1];
+            lastScore = Score.compute(freq, lastScore, checkmarkValue);
+            timestamps[i] = beginning + day * i;
+            values[i] = lastScore;
+        }
+
+        insert(timestamps, values);
+    }
+
+    private void insert(long timestamps[], long values[])
+    {
+        String query = "insert into Score(habit, timestamp, score) values (?,?,?)";
+
+        SQLiteDatabase db = Cache.openDatabase();
+        db.beginTransaction();
+
+        try
+        {
+            SQLiteStatement statement = db.compileStatement(query);
+            statement.bindString(1, habit.getId().toString());
 
-                    Score s = new Score();
-                    s.habit = habit;
-                    s.timestamp = beginning + day * i;
-                    s.score = lastScore = Score.compute(freq, lastScore, checkmarkValue);
-                    s.save();
+            for (int i = 0; i < timestamps.length; i++)
+            {
+                statement.bindLong(2, timestamps[i]);
+                statement.bindLong(3, values[i]);
+                statement.execute();
             }
+
+            db.setTransactionSuccessful();
+        }
+        finally
+        {
+            db.endTransaction();
         }
-        });
     }
 
     /**
@@ -185,9 +208,9 @@ public class ScoreList
      */
     public int getValue(long timestamp)
     {
-        Score s = get(timestamp);
-        if(s == null) return 0;
-        else return s.score;
+        computeAll();
+        String[] args = { habit.getId().toString(), Long.toString(timestamp) };
+        return SQLiteUtils.intQuery("select score from Score where habit = ? and timestamp = ?", args);
     }
 
     /**