Import data from HabitBull

Closes #44

app/src/main/java/org/isoron/uhabits/io/GenericImporter.java

@@ -35,6 +35,7 @@ public class GenericImporter extends AbstractImporter
         importers = new LinkedList<>();
         importers.add(new RewireDBImporter());
         importers.add(new TickmateDBImporter());
+        importers.add(new HabitBullCSVImporter());
     }
 
     @Override

app/src/main/java/org/isoron/uhabits/io/HabitBullCSVImporter.java

@@ -0,0 +1,90 @@
+/*
+ * Copyright (C) 2016 Álinson Santos Xavier <isoron@gmail.com>
+ *
+ * This file is part of Loop Habit Tracker.
+ *
+ * Loop Habit Tracker is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or (at your
+ * option) any later version.
+ *
+ * Loop Habit Tracker is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package org.isoron.uhabits.io;
+
+import android.support.annotation.NonNull;
+import android.util.Log;
+
+import com.opencsv.CSVReader;
+
+import org.isoron.helpers.DateHelper;
+import org.isoron.uhabits.models.Habit;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileReader;
+import java.io.IOException;
+import java.util.Calendar;
+import java.util.HashMap;
+
+public class HabitBullCSVImporter extends AbstractImporter
+{
+    @Override
+    public boolean canHandle(@NonNull File file) throws IOException
+    {
+        BufferedReader reader = new BufferedReader(new FileReader(file));
+        String line = reader.readLine();
+
+        return line.startsWith("HabitName,HabitDescription,HabitCategory");
+    }
+
+    @Override
+    public void importHabitsFromFile(@NonNull File file) throws IOException
+    {
+        CSVReader reader = new CSVReader(new FileReader(file));
+        HashMap<String, Habit> habits = new HashMap<>();
+
+        for(String line[] : reader)
+        {
+            String name = line[0];
+            if(name.equals("HabitName")) continue;
+
+            String description = line[1];
+            String dateString[] = line[3].split("-");
+            int year = Integer.parseInt(dateString[0]);
+            int month = Integer.parseInt(dateString[1]);
+            int day = Integer.parseInt(dateString[2]);
+
+            Calendar date = DateHelper.getStartOfTodayCalendar();
+            date.set(year, month - 1, day);
+
+            long timestamp = date.getTimeInMillis();
+
+            int value = Integer.parseInt(line[4]);
+            if(value != 1) continue;
+
+            Habit h = habits.get(name);
+
+            if(h == null)
+            {
+                h = new Habit();
+                h.name = name;
+                h.description = description;
+                h.freqNum = h.freqDen = 1;
+                h.save();
+
+                habits.put(name, h);
+            }
+
+            if(!h.repetitions.contains(timestamp))
+                h.repetitions.toggle(timestamp);
+        }
+    }
+}