app/src/main/java/net/ktnx/mobileledger/model/LedgerTransaction.java

   1 /*
   2  * Copyright © 2021 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.model;
  19
  20 import android.database.Cursor;
  21 import android.database.sqlite.SQLiteDatabase;
  22
  23 import androidx.annotation.NonNull;
  24 import androidx.annotation.Nullable;
  25
  26 import net.ktnx.mobileledger.App;
  27 import net.ktnx.mobileledger.utils.Digest;
  28 import net.ktnx.mobileledger.utils.Globals;
  29 import net.ktnx.mobileledger.utils.SimpleDate;
  30
  31 import java.nio.charset.StandardCharsets;
  32 import java.security.NoSuchAlgorithmException;
  33 import java.text.ParseException;
  34 import java.util.ArrayList;
  35 import java.util.Comparator;
  36 import java.util.List;
  37
  38 public class LedgerTransaction {
  39     private static final String DIGEST_TYPE = "SHA-256";
  40     public final Comparator<LedgerTransactionAccount> comparator = (o1, o2) -> {
  41         int res = o1.getAccountName()
  42                     .compareTo(o2.getAccountName());
  43         if (res != 0)
  44             return res;
  45         res = o1.getCurrency()
  46                 .compareTo(o2.getCurrency());
  47         if (res != 0)
  48             return res;
  49         res = o1.getComment()
  50                 .compareTo(o2.getComment());
  51         if (res != 0)
  52             return res;
  53         return Float.compare(o1.getAmount(), o2.getAmount());
  54     };
  55     private final long profile;
  56     private final long id;
  57     private final List<LedgerTransactionAccount> accounts;
  58     private SimpleDate date;
  59     private String description;
  60     private String comment;
  61     private String dataHash;
  62     private boolean dataLoaded;
  63     public LedgerTransaction(long id, String dateString, String description) throws ParseException {
  64         this(id, Globals.parseLedgerDate(dateString), description);
  65     }
  66     public LedgerTransaction(long id, SimpleDate date, String description,
  67                              MobileLedgerProfile profile) {
  68         this.profile = profile.getId();
  69         this.id = id;
  70         this.date = date;
  71         this.description = description;
  72         this.accounts = new ArrayList<>();
  73         this.dataHash = null;
  74         dataLoaded = false;
  75     }
  76     public LedgerTransaction(long id, SimpleDate date, String description) {
  77         this(id, date, description, Data.getProfile());
  78     }
  79     public LedgerTransaction(SimpleDate date, String description) {
  80         this(0, date, description);
  81     }
  82     public LedgerTransaction(int id) {
  83         this(id, (SimpleDate) null, null);
  84     }
  85     public LedgerTransaction(int id, long profileId) {
  86         this.profile = profileId;
  87         this.id = id;
  88         this.date = null;
  89         this.description = null;
  90         this.accounts = new ArrayList<>();
  91         this.dataHash = null;
  92         this.dataLoaded = false;
  93     }
  94     public List<LedgerTransactionAccount> getAccounts() {
  95         return accounts;
  96     }
  97     public void addAccount(LedgerTransactionAccount item) {
  98         accounts.add(item);
  99         dataHash = null;
 100     }
 101     @Nullable
 102     public SimpleDate getDateIfAny() {
 103         return date;
 104     }
 105     @NonNull
 106     public SimpleDate getDate() {
 107         if (date == null)
 108             throw new IllegalStateException("Transaction has no date");
 109         return date;
 110     }
 111     public void setDate(SimpleDate date) {
 112         this.date = date;
 113         dataHash = null;
 114     }
 115     public String getDescription() {
 116         return description;
 117     }
 118     public void setDescription(String description) {
 119         this.description = description;
 120         dataHash = null;
 121     }
 122     public String getComment() {
 123         return comment;
 124     }
 125     public void setComment(String comment) {
 126         this.comment = comment;
 127     }
 128     public long getId() {
 129         return id;
 130     }
 131     protected void fillDataHash() {
 132         loadData(App.getDatabase());
 133         if (dataHash != null)
 134             return;
 135         try {
 136             Digest sha = new Digest(DIGEST_TYPE);
 137             StringBuilder data = new StringBuilder();
 138             data.append("ver1");
 139             data.append(profile);
 140             data.append(getId());
 141             data.append('\0');
 142             data.append(getDescription());
 143             data.append('\0');
 144             data.append(getComment());
 145             data.append('\0');
 146             data.append(Globals.formatLedgerDate(getDate()));
 147             data.append('\0');
 148             for (LedgerTransactionAccount item : accounts) {
 149                 data.append(item.getAccountName());
 150                 data.append('\0');
 151                 data.append(item.getCurrency());
 152                 data.append('\0');
 153                 data.append(item.getAmount());
 154                 data.append('\0');
 155                 data.append(item.getComment());
 156             }
 157             sha.update(data.toString()
 158                            .getBytes(StandardCharsets.UTF_8));
 159             dataHash = sha.digestToHexString();
 160         }
 161         catch (NoSuchAlgorithmException e) {
 162             throw new RuntimeException(
 163                     String.format("Unable to get instance of %s digest", DIGEST_TYPE), e);
 164         }
 165     }
 166     public synchronized void loadData(SQLiteDatabase db) {
 167         if (dataLoaded)
 168             return;
 169
 170         try (Cursor cTr = db.rawQuery(
 171                 "SELECT year, month, day, description, comment from transactions WHERE id=?",
 172                 new String[]{String.valueOf(id)}))
 173         {
 174             if (cTr.moveToFirst()) {
 175                 date = new SimpleDate(cTr.getInt(0), cTr.getInt(1), cTr.getInt(2));
 176                 description = cTr.getString(3);
 177                 comment = cTr.getString(4);
 178
 179                 accounts.clear();
 180
 181                 try (Cursor cAcc = db.rawQuery(
 182                         "SELECT account_name, amount, currency, comment FROM " +
 183                         "transaction_accounts WHERE transaction_id = ?",
 184                         new String[]{String.valueOf(id)}))
 185                 {
 186                     while (cAcc.moveToNext()) {
 187 //                        debug("transactions",
 188 //                                String.format("Loaded %d: %s %1.2f %s", id, cAcc.getString(0),
 189 //                                        cAcc.getFloat(1), cAcc.getString(2)));
 190                         addAccount(new LedgerTransactionAccount(cAcc.getString(0), cAcc.getFloat(1),
 191                                 cAcc.getString(2), cAcc.getString(3)));
 192                     }
 193
 194                     finishLoading();
 195                 }
 196             }
 197         }
 198
 199     }
 200     public String getDataHash() {
 201         fillDataHash();
 202         return dataHash;
 203     }
 204     public void finishLoading() {
 205         dataLoaded = true;
 206     }
 207     @Override
 208     public boolean equals(@Nullable Object obj) {
 209         if (obj == null)
 210             return false;
 211         if (!obj.getClass()
 212                 .equals(this.getClass()))
 213             return false;
 214
 215         return ((LedgerTransaction) obj).getDataHash()
 216                                         .equals(getDataHash());
 217     }
 218
 219     public boolean hasAccountNamedLike(String name) {
 220         name = name.toUpperCase();
 221         for (LedgerTransactionAccount acc : accounts) {
 222             if (acc.getAccountName()
 223                    .toUpperCase()
 224                    .contains(name))
 225                 return true;
 226         }
 227
 228         return false;
 229     }
 230     public void markDataAsLoaded() {
 231         dataLoaded = true;
 232     }
 233 }