2 * Copyright © 2019 Damyan Ivanov.
3 * This file is part of Mobile-Ledger.
4 * Mobile-Ledger 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.
9 * Mobile-Ledger 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.
14 * You should have received a copy of the GNU General Public License
15 * along with Mobile-Ledger. If not, see <https://www.gnu.org/licenses/>.
18 package net.ktnx.mobileledger.utils;
20 import android.annotation.TargetApi;
21 import android.content.Context;
22 import android.content.res.Resources;
23 import android.database.Cursor;
24 import android.database.MatrixCursor;
25 import android.database.SQLException;
26 import android.database.sqlite.SQLiteDatabase;
27 import android.database.sqlite.SQLiteOpenHelper;
28 import android.os.Build;
29 import android.provider.FontsContract;
30 import android.util.Log;
31 import android.widget.AutoCompleteTextView;
32 import android.widget.FilterQueryProvider;
33 import android.widget.SimpleCursorAdapter;
35 import java.io.BufferedReader;
36 import java.io.IOException;
37 import java.io.InputStream;
38 import java.io.InputStreamReader;
39 import java.util.Locale;
41 import static net.ktnx.mobileledger.utils.MLDB.DatabaseMode.READ;
42 import static net.ktnx.mobileledger.utils.MLDB.DatabaseMode.WRITE;
44 public final class MLDB {
45 public static final String ACCOUNTS_TABLE = "accounts";
46 public static final String DESCRIPTION_HISTORY_TABLE = "description_history";
47 public static final String OPT_TRANSACTION_LIST_STAMP = "transaction_list_last_update";
48 private static MobileLedgerDatabase helperForReading, helperForWriting;
49 private static Context context;
50 private static void checkState() {
52 throw new IllegalStateException("First call init with a valid context");
54 public static synchronized SQLiteDatabase getDatabase(DatabaseMode mode) {
58 if (helperForReading == null) helperForReading = new MobileLedgerDatabase(context);
59 return helperForReading.getReadableDatabase();
62 if (helperForWriting == null) helperForWriting = new MobileLedgerDatabase(context);
63 return helperForWriting.getWritableDatabase();
66 public static SQLiteDatabase getReadableDatabase() {
67 return getDatabase(READ);
69 public static SQLiteDatabase getWritableDatabase() {
70 return getDatabase(WRITE);
72 static public int get_option_value(String name, int default_value) {
73 String s = get_option_value(name, String.valueOf(default_value));
75 return Integer.parseInt(s);
78 Log.d("db", "returning default int value of " + name, e);
82 static public long get_option_value(String name, long default_value) {
83 String s = get_option_value(name, String.valueOf(default_value));
85 return Long.parseLong(s);
88 Log.d("db", "returning default long value of " + name, e);
92 static public String get_option_value(String name, String default_value) {
93 Log.d("db", "about to fetch option " + name);
94 try (SQLiteDatabase db = getReadableDatabase()) {
95 try (Cursor cursor = db
96 .rawQuery("select value from options where name=?", new String[]{name}))
98 if (cursor.moveToFirst()) {
99 String result = cursor.getString(0);
101 if (result == null) result = default_value;
103 Log.d("db", "option " + name + "=" + result);
106 else return default_value;
108 catch (Exception e) {
109 Log.d("db", "returning default value for " + name, e);
110 return default_value;
114 static public void set_option_value(String name, String value) {
115 Log.d("db", "setting option " + name + "=" + value);
116 try (SQLiteDatabase db = getWritableDatabase()) {
117 db.execSQL("insert or replace into options(name, value) values(?, ?);",
118 new String[]{name, value});
121 static public void set_option_value(String name, long value) {
122 set_option_value(name, String.valueOf(value));
124 @TargetApi(Build.VERSION_CODES.N)
125 public static void hook_autocompletion_adapter(final Context context,
126 final AutoCompleteTextView view,
127 final String table, final String field) {
128 String[] from = {field};
129 int[] to = {android.R.id.text1};
130 SimpleCursorAdapter adapter =
131 new SimpleCursorAdapter(context, android.R.layout.simple_dropdown_item_1line, null,
133 adapter.setStringConversionColumn(1);
135 FilterQueryProvider provider = new FilterQueryProvider() {
137 public Cursor runQuery(CharSequence constraint) {
138 if (constraint == null) return null;
140 String str = constraint.toString().toUpperCase();
141 Log.d("autocompletion", "Looking for " + str);
142 String[] col_names = {FontsContract.Columns._ID, field};
143 MatrixCursor c = new MatrixCursor(col_names);
145 try (SQLiteDatabase db = MLDB.getReadableDatabase()) {
147 try (Cursor matches = db.rawQuery(String.format(
148 "SELECT %s as a, case when %s_upper LIKE ?||'%%' then 1 " +
149 "WHEN %s_upper LIKE '%%:'||?||'%%' then 2 " +
150 "WHEN %s_upper LIKE '%% '||?||'%%' then 3 " + "else 9 end " +
151 "FROM %s " + "WHERE %s_upper LIKE '%%'||?||'%%' " + "ORDER BY 2, 1;",
152 field, field, field, field, table, field),
153 new String[]{str, str, str, str}))
156 while (matches.moveToNext()) {
157 String match = matches.getString(0);
158 int order = matches.getInt(1);
159 Log.d("autocompletion", String.format("match: %s |%d", match, order));
160 c.newRow().add(i++).add(match);
170 adapter.setFilterQueryProvider(provider);
172 view.setAdapter(adapter);
174 public static void init(Context context) {
175 MLDB.context = context.getApplicationContext();
177 public enum DatabaseMode {READ, WRITE}
180 class MobileLedgerDatabase extends SQLiteOpenHelper implements AutoCloseable {
181 public static final String DB_NAME = "mobile-ledger.db";
182 public static final int LATEST_REVISION = 10;
184 private final Context mContext;
186 public MobileLedgerDatabase(Context context) {
187 super(context, DB_NAME, null, LATEST_REVISION);
188 Log.d("db", "creating helper instance");
190 super.setWriteAheadLoggingEnabled(true);
194 public void onCreate(SQLiteDatabase db) {
195 Log.d("db", "onCreate called");
196 onUpgrade(db, -1, LATEST_REVISION);
200 public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
201 Log.d("db", "onUpgrade called");
202 for (int i = oldVersion + 1; i <= newVersion; i++) applyRevision(db, i);
205 private void applyRevision(SQLiteDatabase db, int rev_no) {
206 final Resources rm = mContext.getResources();
207 String rev_file = String.format(Locale.US, "sql_%d", rev_no);
209 int res_id = rm.getIdentifier(rev_file, "raw", mContext.getPackageName());
211 throw new SQLException(String.format(Locale.US, "No resource for revision %d", rev_no));
212 db.beginTransaction();
213 try (InputStream res = rm.openRawResource(res_id)) {
214 Log.d("db", "Applying revision " + String.valueOf(rev_no));
215 InputStreamReader isr = new InputStreamReader(res);
216 BufferedReader reader = new BufferedReader(isr);
219 while ((line = reader.readLine()) != null) {
223 db.setTransactionSuccessful();
225 catch (IOException e) {
226 Log.e("db", String.format("Error opening raw resource for revision %d", rev_no));