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

   1 /*
   2  * Copyright © 2019 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 net.ktnx.mobileledger.json.ParsedLedgerTransaction;
  24 import net.ktnx.mobileledger.json.ParsedPosting;
  25 import net.ktnx.mobileledger.utils.Digest;
  26 import net.ktnx.mobileledger.utils.Globals;
  27
  28 import java.nio.charset.Charset;
  29 import java.security.NoSuchAlgorithmException;
  30 import java.text.ParseException;
  31 import java.util.ArrayList;
  32 import java.util.Comparator;
  33 import java.util.Date;
  34
  35 public class LedgerTransaction {
  36     private static final String DIGEST_TYPE = "SHA-256";
  37     public final Comparator<LedgerTransactionAccount> comparator =
  38             new Comparator<LedgerTransactionAccount>() {
  39                 @Override
  40                 public int compare(LedgerTransactionAccount o1, LedgerTransactionAccount o2) {
  41                     int res = o1.getAccountName().compareTo(o2.getAccountName());
  42                     if (res != 0) return res;
  43                     res = o1.getCurrency().compareTo(o2.getCurrency());
  44                     if (res != 0) return res;
  45                     return Float.compare(o1.getAmount(), o2.getAmount());
  46                 }
  47             };
  48     private String profile;
  49     private Integer id;
  50     private Date date;
  51     private String description;
  52     private ArrayList<LedgerTransactionAccount> accounts;
  53     private String dataHash;
  54     private boolean dataLoaded;
  55     public LedgerTransaction(Integer id, String dateString, String description)
  56             throws ParseException {
  57         this(id, Globals.parseLedgerDate(dateString), description);
  58     }
  59     public LedgerTransaction(Integer id, Date date, String description, MobileLedgerProfile profile) {
  60         this.profile = profile.getUuid();
  61         this.id = id;
  62         this.date = date;
  63         this.description = description;
  64         this.accounts = new ArrayList<>();
  65         this.dataHash = null;
  66         dataLoaded = false;
  67     }
  68     public LedgerTransaction(Integer id, Date date, String description) {
  69         this(id, date, description, Data.profile.getValue());
  70     }
  71     public LedgerTransaction(Date date, String description) {
  72         this(null, date, description);
  73     }
  74     public LedgerTransaction(int id) {
  75         this(id, (Date) null, null);
  76     }
  77     public LedgerTransaction(int id, String profileUUID) {
  78         this.profile = profileUUID;
  79         this.id = id;
  80         this.date = null;
  81         this.description = null;
  82         this.accounts = new ArrayList<>();
  83         this.dataHash = null;
  84         this.dataLoaded = false;
  85     }
  86     public ArrayList<LedgerTransactionAccount> getAccounts() {
  87         return accounts;
  88     }
  89     public void addAccount(LedgerTransactionAccount item) {
  90         accounts.add(item);
  91         dataHash = null;
  92     }
  93     public Date getDate() {
  94         return date;
  95     }
  96     public void setDate(Date date) {
  97         this.date = date;
  98         dataHash = null;
  99     }
 100     public String getDescription() {
 101         return description;
 102     }
 103     public void setDescription(String description) {
 104         this.description = description;
 105         dataHash = null;
 106     }
 107     public int getId() {
 108         return id;
 109     }
 110     protected void fillDataHash() {
 111         if (dataHash != null) return;
 112         try {
 113             Digest sha = new Digest(DIGEST_TYPE);
 114             StringBuilder data = new StringBuilder();
 115             data.append(profile);
 116             data.append(getId());
 117             data.append('\0');
 118             data.append(getDescription());
 119             data.append('\0');
 120             data.append(Globals.formatLedgerDate(getDate()));
 121             data.append('\0');
 122             for (LedgerTransactionAccount item : accounts) {
 123                 data.append(item.getAccountName());
 124                 data.append('\0');
 125                 data.append(item.getCurrency());
 126                 data.append('\0');
 127                 data.append(item.getAmount());
 128             }
 129             sha.update(data.toString().getBytes(Charset.forName("UTF-8")));
 130             dataHash = sha.digestToHexString();
 131         }
 132         catch (NoSuchAlgorithmException e) {
 133             throw new RuntimeException(
 134                     String.format("Unable to get instance of %s digest", DIGEST_TYPE), e);
 135         }
 136     }
 137     public boolean existsInDb(SQLiteDatabase db) {
 138         fillDataHash();
 139         try (Cursor c = db
 140                 .rawQuery("SELECT 1 from transactions where data_hash = ?", new String[]{dataHash}))
 141         {
 142             boolean result = c.moveToFirst();
 143 //            debug("db", String.format("Transaction %d (%s) %s", id, dataHash,
 144 //                    result ? "already present" : "not present"));
 145             return result;
 146         }
 147     }
 148     public void loadData(SQLiteDatabase db) {
 149         if (dataLoaded) return;
 150
 151         try (Cursor cTr = db
 152                 .rawQuery("SELECT date, description from transactions WHERE profile=? AND id=?",
 153                         new String[]{profile, String.valueOf(id)}))
 154         {
 155             if (cTr.moveToFirst()) {
 156                 String dateString = cTr.getString(0);
 157                 try {
 158                     date = Globals.parseLedgerDate(dateString);
 159                 }
 160                 catch (ParseException e) {
 161                     e.printStackTrace();
 162                     throw new RuntimeException(
 163                             String.format("Error parsing date '%s' from " + "transacion %d",
 164                                     dateString, id));
 165                 }
 166                 description = cTr.getString(1);
 167
 168                 try (Cursor cAcc = db.rawQuery("SELECT account_name, amount, currency FROM " +
 169                                                "transaction_accounts WHERE " +
 170                                                "profile=? AND transaction_id = ?",
 171                         new String[]{profile, String.valueOf(id)}))
 172                 {
 173                     while (cAcc.moveToNext()) {
 174 //                        debug("transactions",
 175 //                                String.format("Loaded %d: %s %1.2f %s", id, cAcc.getString(0),
 176 //                                        cAcc.getFloat(1), cAcc.getString(2)));
 177                         addAccount(new LedgerTransactionAccount(cAcc.getString(0), cAcc.getFloat(1),
 178                                 cAcc.getString(2)));
 179                     }
 180
 181                     finishLoading();
 182                 }
 183             }
 184         }
 185
 186     }
 187     public String getDataHash() {
 188         return dataHash;
 189     }
 190     public void finishLoading() {
 191         dataLoaded = true;
 192     }
 193     public ParsedLedgerTransaction toParsedLedgerTransaction() {
 194         ParsedLedgerTransaction result = new ParsedLedgerTransaction();
 195         result.setTcomment("");
 196         result.setTprecedingcomment("");
 197
 198         ArrayList<ParsedPosting> postings = new ArrayList<>();
 199         for (LedgerTransactionAccount acc : accounts) {
 200             if (!acc.getAccountName().isEmpty()) postings.add(acc.asParsedPosting());
 201         }
 202
 203         result.setTpostings(postings);
 204         result.setTdate(Globals.formatIsoDate(date));
 205         result.setTdate2(null);
 206         result.setTindex(1);
 207         result.setTdescription(description);
 208         return result;
 209     }
 210 }