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

   1 /*
   2  * Copyright © 2020 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 String profile;
  56     private final Integer id;
  57     private SimpleDate date;
  58     private String description;
  59     private String comment;
  60     private final List<LedgerTransactionAccount> accounts;
  61     private String dataHash;
  62     private boolean dataLoaded;
  63     public LedgerTransaction(Integer id, String dateString, String description)
  64             throws ParseException {
  65         this(id, Globals.parseLedgerDate(dateString), description);
  66     }
  67     public LedgerTransaction(Integer id, SimpleDate date, String description,
  68                              MobileLedgerProfile profile) {
  69         this.profile = profile.getUuid();
  70         this.id = id;
  71         this.date = date;
  72         this.description = description;
  73         this.accounts = new ArrayList<>();
  74         this.dataHash = null;
  75         dataLoaded = false;
  76     }
  77     public LedgerTransaction(Integer id, SimpleDate date, String description) {
  78         this(id, date, description, Data.getProfile());
  79     }
  80     public LedgerTransaction(SimpleDate date, String description) {
  81         this(null, date, description);
  82     }
  83     public LedgerTransaction(int id) {
  84         this(id, (SimpleDate) null, null);
  85     }
  86     public LedgerTransaction(int id, String profileUUID) {
  87         this.profile = profileUUID;
  88         this.id = id;
  89         this.date = null;
  90         this.description = null;
  91         this.accounts = new ArrayList<>();
  92         this.dataHash = null;
  93         this.dataLoaded = false;
  94     }
  95     public List<LedgerTransactionAccount> getAccounts() {
  96         return accounts;
  97     }
  98     public void addAccount(LedgerTransactionAccount item) {
  99         accounts.add(item);
 100         dataHash = null;
 101     }
 102     @Nullable
 103     public SimpleDate getDateIfAny() {
 104         return date;
 105     }
 106     @NonNull
 107     public SimpleDate getDate() {
 108         if (date == null)
 109             throw new IllegalStateException("Transaction has no date");
 110         return date;
 111     }
 112     public void setDate(SimpleDate date) {
 113         this.date = date;
 114         dataHash = null;
 115     }
 116     public String getDescription() {
 117         return description;
 118     }
 119     public void setDescription(String description) {
 120         this.description = description;
 121         dataHash = null;
 122     }
 123     public String getComment() {
 124         return comment;
 125     }
 126     public void setComment(String comment) {
 127         this.comment = comment;
 128     }
 129     public int getId() {
 130         return id;
 131     }
 132     protected void fillDataHash() {
 133         loadData(App.getDatabase());
 134         if (dataHash != null)
 135             return;
 136         try {
 137             Digest sha = new Digest(DIGEST_TYPE);
 138             StringBuilder data = new StringBuilder();
 139             data.append("ver1");
 140             data.append(profile);
 141             data.append(getId());
 142             data.append('\0');
 143             data.append(getDescription());
 144             data.append('\0');
 145             data.append(getComment());
 146             data.append('\0');
 147             data.append(Globals.formatLedgerDate(getDate()));
 148             data.append('\0');
 149             for (LedgerTransactionAccount item : accounts) {
 150                 data.append(item.getAccountName());
 151                 data.append('\0');
 152                 data.append(item.getCurrency());
 153                 data.append('\0');
 154                 data.append(item.getAmount());
 155                 data.append('\0');
 156                 data.append(item.getComment());
 157             }
 158             sha.update(data.toString()
 159                            .getBytes(StandardCharsets.UTF_8));
 160             dataHash = sha.digestToHexString();
 161         }
 162         catch (NoSuchAlgorithmException e) {
 163             throw new RuntimeException(
 164                     String.format("Unable to get instance of %s digest", DIGEST_TYPE), e);
 165         }
 166     }
 167     public synchronized void loadData(SQLiteDatabase db) {
 168         if (dataLoaded)
 169             return;
 170
 171         try (Cursor cTr = db.rawQuery(
 172                 "SELECT year, month, day, description, comment from transactions WHERE profile=? " +
 173                 "AND id=?", new String[]{profile, String.valueOf(id)}))
 174         {
 175             if (cTr.moveToFirst()) {
 176                 date = new SimpleDate(cTr.getInt(0), cTr.getInt(1), cTr.getInt(2));
 177                 description = cTr.getString(3);
 178                 comment = cTr.getString(4);
 179
 180                 accounts.clear();
 181
 182                 try (Cursor cAcc = db.rawQuery(
 183                         "SELECT account_name, amount, currency, comment FROM " +
 184                         "transaction_accounts WHERE profile=? AND transaction_id = ?",
 185                         new String[]{profile, String.valueOf(id)}))
 186                 {
 187                     while (cAcc.moveToNext()) {
 188 //                        debug("transactions",
 189 //                                String.format("Loaded %d: %s %1.2f %s", id, cAcc.getString(0),
 190 //                                        cAcc.getFloat(1), cAcc.getString(2)));
 191                         addAccount(new LedgerTransactionAccount(cAcc.getString(0), cAcc.getFloat(1),
 192                                 cAcc.getString(2), cAcc.getString(3)));
 193                     }
 194
 195                     finishLoading();
 196                 }
 197             }
 198         }
 199
 200     }
 201     public String getDataHash() {
 202         fillDataHash();
 203         return dataHash;
 204     }
 205     public void finishLoading() {
 206         dataLoaded = true;
 207     }
 208     @Override
 209     public boolean equals(@Nullable Object obj) {
 210         if (obj == null)
 211             return false;
 212         if (!obj.getClass()
 213                 .equals(this.getClass()))
 214             return false;
 215
 216         return ((LedgerTransaction) obj).getDataHash()
 217                                         .equals(getDataHash());
 218     }
 219
 220     public boolean hasAccountNamedLike(String name) {
 221         name = name.toUpperCase();
 222         for (LedgerTransactionAccount acc : accounts) {
 223             if (acc.getAccountName()
 224                    .toUpperCase()
 225                    .contains(name))
 226                 return true;
 227         }
 228
 229         return false;
 230     }
 231     public void markDataAsLoaded() {
 232         dataLoaded = true;
 233     }
 234 }