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[mobile-ledger.git] / app / src / main / java / net / ktnx / mobileledger / async / RefreshDescriptionsTask.java
1 /*
2  * Copyright © 2019 Damyan Ivanov.
3  * This file is part of MoLe.
4  * MoLe is free software: you can distribute it and/or modify it
5  * under the term of the GNU General Public License as published by
6  * the Free Software Foundation, either version 3 of the License, or
7  * (at your opinion), any later version.
8  *
9  * MoLe is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12  * GNU General Public License terms for details.
13  *
14  * You should have received a copy of the GNU General Public License
15  * along with MoLe. If not, see <https://www.gnu.org/licenses/>.
16  */
17
18 package net.ktnx.mobileledger.async;
19
20 import android.database.Cursor;
21 import android.database.sqlite.SQLiteDatabase;
22 import android.os.AsyncTask;
23 import android.util.Log;
24
25 import net.ktnx.mobileledger.model.Data;
26 import net.ktnx.mobileledger.utils.MLDB;
27
28 import java.util.HashMap;
29 import java.util.Map;
30
31 public class RefreshDescriptionsTask extends AsyncTask<Void, Void, Void> {
32     @Override
33     protected Void doInBackground(Void... voids) {
34         Map<String, Boolean> unique = new HashMap<>();
35
36         Log.d("descriptions", "Starting refresh");
37         SQLiteDatabase db = MLDB.getDatabase();
38
39         Data.backgroundTaskCount.incrementAndGet();
40         try {
41             db.beginTransaction();
42             try {
43                 db.execSQL("UPDATE description_history set keep=0");
44                 try (Cursor c = db
45                         .rawQuery("SELECT distinct description from transactions", null))
46                 {
47                     while (c.moveToNext()) {
48                         String description = c.getString(0);
49                         String descriptionUpper = description.toUpperCase();
50                         if (unique.containsKey(descriptionUpper)) continue;
51
52                         db.execSQL(
53                                 "replace into description_history(description, description_upper, " +
54                                 "keep) values(?, ?, 1)", new String[]{description, descriptionUpper});
55                         unique.put(descriptionUpper, true);
56                     }
57                 }
58                 db.execSQL("DELETE from description_history where keep=0");
59                 db.setTransactionSuccessful();
60                 Log.d("descriptions", "Refresh successful");
61             }
62             finally {
63                 db.endTransaction();
64             }
65         }
66         finally {
67             Data.backgroundTaskCount.decrementAndGet();
68             Log.d("descriptions", "Refresh done");
69         }
70
71         return null;
72     }
73 }