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 public static final String OPT_LAST_REFRESH = "last_refresh";
49 private static MobileLedgerDatabase helperForReading, helperForWriting;
50 private static Context context;
51 private static void checkState() {
53 throw new IllegalStateException("First call init with a valid context");
55 public static synchronized SQLiteDatabase getDatabase(DatabaseMode mode) {
59 if (helperForReading == null) helperForReading = new MobileLedgerDatabase(context);
60 return helperForReading.getReadableDatabase();
63 if (helperForWriting == null) helperForWriting = new MobileLedgerDatabase(context);
64 return helperForWriting.getWritableDatabase();
67 public static SQLiteDatabase getReadableDatabase() {
68 return getDatabase(READ);
70 public static SQLiteDatabase getWritableDatabase() {
71 return getDatabase(WRITE);
73 static public int get_option_value(String name, int default_value) {
74 String s = get_option_value(name, String.valueOf(default_value));
76 return Integer.parseInt(s);
79 Log.d("db", "returning default int value of " + name, e);
83 static public long get_option_value(String name, long default_value) {
84 String s = get_option_value(name, String.valueOf(default_value));
86 return Long.parseLong(s);
89 Log.d("db", "returning default long value of " + name, e);
93 static public String get_option_value(String name, String default_value) {
94 Log.d("db", "about to fetch option " + name);
95 try (SQLiteDatabase db = getReadableDatabase()) {
96 try (Cursor cursor = db
97 .rawQuery("select value from options where name=?", new String[]{name}))
99 if (cursor.moveToFirst()) {
100 String result = cursor.getString(0);
102 if (result == null) result = default_value;
104 Log.d("db", "option " + name + "=" + result);
107 else return default_value;
109 catch (Exception e) {
110 Log.d("db", "returning default value for " + name, e);
111 return default_value;
115 static public void set_option_value(String name, String value) {
116 Log.d("db", "setting option " + name + "=" + value);
117 try (SQLiteDatabase db = getWritableDatabase()) {
118 db.execSQL("insert or replace into options(name, value) values(?, ?);",
119 new String[]{name, value});
122 static public void set_option_value(String name, long value) {
123 set_option_value(name, String.valueOf(value));
125 @TargetApi(Build.VERSION_CODES.N)
126 public static void hook_autocompletion_adapter(final Context context,
127 final AutoCompleteTextView view,
128 final String table, final String field) {
129 String[] from = {field};
130 int[] to = {android.R.id.text1};
131 SimpleCursorAdapter adapter =
132 new SimpleCursorAdapter(context, android.R.layout.simple_dropdown_item_1line, null,
134 adapter.setStringConversionColumn(1);
136 FilterQueryProvider provider = new FilterQueryProvider() {
138 public Cursor runQuery(CharSequence constraint) {
139 if (constraint == null) return null;
141 String str = constraint.toString().toUpperCase();
142 Log.d("autocompletion", "Looking for " + str);
143 String[] col_names = {FontsContract.Columns._ID, field};
144 MatrixCursor c = new MatrixCursor(col_names);
146 try (SQLiteDatabase db = MLDB.getReadableDatabase()) {
148 try (Cursor matches = db.rawQuery(String.format(
149 "SELECT %s as a, case when %s_upper LIKE ?||'%%' then 1 " +
150 "WHEN %s_upper LIKE '%%:'||?||'%%' then 2 " +
151 "WHEN %s_upper LIKE '%% '||?||'%%' then 3 " + "else 9 end " +
152 "FROM %s " + "WHERE %s_upper LIKE '%%'||?||'%%' " + "ORDER BY 2, 1;",
153 field, field, field, field, table, field),
154 new String[]{str, str, str, str}))
157 while (matches.moveToNext()) {
158 String match = matches.getString(0);
159 int order = matches.getInt(1);
160 Log.d("autocompletion", String.format("match: %s |%d", match, order));
161 c.newRow().add(i++).add(match);
171 adapter.setFilterQueryProvider(provider);
173 view.setAdapter(adapter);
175 public static void init(Context context) {
176 MLDB.context = context.getApplicationContext();
178 public enum DatabaseMode {READ, WRITE}
181 class MobileLedgerDatabase extends SQLiteOpenHelper implements AutoCloseable {
182 public static final String DB_NAME = "mobile-ledger.db";
183 public static final int LATEST_REVISION = 10;
185 private final Context mContext;
187 public MobileLedgerDatabase(Context context) {
188 super(context, DB_NAME, null, LATEST_REVISION);
189 Log.d("db", "creating helper instance");
191 super.setWriteAheadLoggingEnabled(true);
195 public void onCreate(SQLiteDatabase db) {
196 Log.d("db", "onCreate called");
197 onUpgrade(db, -1, LATEST_REVISION);
201 public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
202 Log.d("db", "onUpgrade called");
203 for (int i = oldVersion + 1; i <= newVersion; i++) applyRevision(db, i);
206 private void applyRevision(SQLiteDatabase db, int rev_no) {
207 final Resources rm = mContext.getResources();
208 String rev_file = String.format(Locale.US, "sql_%d", rev_no);
210 int res_id = rm.getIdentifier(rev_file, "raw", mContext.getPackageName());
212 throw new SQLException(String.format(Locale.US, "No resource for revision %d", rev_no));
213 db.beginTransaction();
214 try (InputStream res = rm.openRawResource(res_id)) {
215 Log.d("db", "Applying revision " + String.valueOf(rev_no));
216 InputStreamReader isr = new InputStreamReader(res);
217 BufferedReader reader = new BufferedReader(isr);
220 while ((line = reader.readLine()) != null) {
224 db.setTransactionSuccessful();
226 catch (IOException e) {
227 Log.e("db", String.format("Error opening raw resource for revision %d", rev_no));