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.model;
20 import android.database.Cursor;
21 import android.database.sqlite.SQLiteDatabase;
22 import android.util.Log;
24 import net.ktnx.mobileledger.utils.Digest;
26 import java.nio.charset.Charset;
27 import java.security.NoSuchAlgorithmException;
28 import java.util.ArrayList;
29 import java.util.Comparator;
31 public class LedgerTransaction {
32 private static final String DIGEST_TYPE = "SHA-256";
33 public final Comparator<LedgerTransactionAccount> comparator =
34 new Comparator<LedgerTransactionAccount>() {
36 public int compare(LedgerTransactionAccount o1, LedgerTransactionAccount o2) {
37 int res = o1.getAccountName().compareTo(o2.getAccountName());
38 if (res != 0) return res;
39 res = o1.getCurrency().compareTo(o2.getCurrency());
40 if (res != 0) return res;
41 return Float.compare(o1.getAmount(), o2.getAmount());
44 private String profile;
47 private String description;
48 private ArrayList<LedgerTransactionAccount> accounts;
49 private String dataHash;
50 private boolean dataLoaded;
51 public LedgerTransaction(Integer id, String date, String description) {
52 this.profile = Data.profile.get().getUuid();
55 this.description = description;
56 this.accounts = new ArrayList<>();
60 public LedgerTransaction(String date, String description) {
61 this(null, date, description);
63 public LedgerTransaction(int id) {
66 public ArrayList<LedgerTransactionAccount> getAccounts() {
69 public void addAccount(LedgerTransactionAccount item) {
73 public String getDate() {
76 public void setDate(String date) {
80 public String getDescription() {
83 public void setDescription(String description) {
84 this.description = description;
90 protected void fillDataHash() {
91 if (dataHash != null) return;
93 Digest sha = new Digest(DIGEST_TYPE);
94 StringBuilder data = new StringBuilder();
98 data.append(getDescription());
100 for (LedgerTransactionAccount item : accounts) {
101 data.append(item.getAccountName());
103 data.append(item.getCurrency());
105 data.append(item.getAmount());
107 sha.update(data.toString().getBytes(Charset.forName("UTF-8")));
108 dataHash = sha.digestToHexString();
110 catch (NoSuchAlgorithmException e) {
111 throw new RuntimeException(
112 String.format("Unable to get instance of %s digest", DIGEST_TYPE), e);
115 public boolean existsInDb(SQLiteDatabase db) {
118 .rawQuery("SELECT 1 from transactions where data_hash = ?", new String[]{dataHash}))
120 boolean result = c.moveToFirst();
121 Log.d("db", String.format("Transaction %d (%s) %s", id, dataHash,
122 result ? "already present" : "not present"));
126 public void loadData(SQLiteDatabase db) {
127 if (dataLoaded) return;
130 .rawQuery("SELECT date, description from transactions WHERE profile=? AND id=?",
131 new String[]{profile, String.valueOf(id)}))
133 if (cTr.moveToFirst()) {
134 date = cTr.getString(0);
135 description = cTr.getString(1);
137 try (Cursor cAcc = db.rawQuery("SELECT account_name, amount, currency FROM " +
138 "transaction_accounts WHERE " +
139 "profile=? AND transaction_id = ?",
140 new String[]{profile, String.valueOf(id)}))
142 while (cAcc.moveToNext()) {
143 // Log.d("transactions",
144 // String.format("Loaded %d: %s %1.2f %s", id, cAcc.getString(0),
145 // cAcc.getFloat(1), cAcc.getString(2)));
146 addAccount(new LedgerTransactionAccount(cAcc.getString(0), cAcc.getFloat(1),
156 public String getDataHash() {
159 public void finishLoading() {