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 import static net.ktnx.mobileledger.utils.Logger.debug;
  36
  37 public class LedgerTransaction {
  38     private static final String DIGEST_TYPE = "SHA-256";
  39     public final Comparator<LedgerTransactionAccount> comparator =
  40             new Comparator<LedgerTransactionAccount>() {
  41                 @Override
  42                 public int compare(LedgerTransactionAccount o1, LedgerTransactionAccount o2) {
  43                     int res = o1.getAccountName().compareTo(o2.getAccountName());
  44                     if (res != 0) return res;
  45                     res = o1.getCurrency().compareTo(o2.getCurrency());
  46                     if (res != 0) return res;
  47                     return Float.compare(o1.getAmount(), o2.getAmount());
  48                 }
  49             };
  50     private String profile;
  51     private Integer id;
  52     private Date date;
  53     private String description;
  54     private ArrayList<LedgerTransactionAccount> accounts;
  55     private String dataHash;
  56     private boolean dataLoaded;
  57     public LedgerTransaction(Integer id, String dateString, String description)
  58             throws ParseException {
  59         this(id, Globals.parseLedgerDate(dateString), description);
  60     }
  61     public LedgerTransaction(Integer id, Date date, String description, MobileLedgerProfile profile) {
  62         this.profile = profile.getUuid();
  63         this.id = id;
  64         this.date = date;
  65         this.description = description;
  66         this.accounts = new ArrayList<>();
  67         this.dataHash = null;
  68         dataLoaded = false;
  69     }
  70     public LedgerTransaction(Integer id, Date date, String description) {
  71         this(id, date, description, Data.profile.get());
  72     }
  73     public LedgerTransaction(Date date, String description) {
  74         this(null, date, description);
  75     }
  76     public LedgerTransaction(int id) {
  77         this(id, (Date) null, null);
  78     }
  79     public LedgerTransaction(int id, String profileUUID) {
  80         this.profile = profileUUID;
  81         this.id = id;
  82         this.date = null;
  83         this.description = null;
  84         this.accounts = new ArrayList<>();
  85         this.dataHash = null;
  86         this.dataLoaded = false;
  87     }
  88     public ArrayList<LedgerTransactionAccount> getAccounts() {
  89         return accounts;
  90     }
  91     public void addAccount(LedgerTransactionAccount item) {
  92         accounts.add(item);
  93         dataHash = null;
  94     }
  95     public Date getDate() {
  96         return date;
  97     }
  98     public void setDate(Date date) {
  99         this.date = date;
 100         dataHash = null;
 101     }
 102     public String getDescription() {
 103         return description;
 104     }
 105     public void setDescription(String description) {
 106         this.description = description;
 107         dataHash = null;
 108     }
 109     public int getId() {
 110         return id;
 111     }
 112     protected void fillDataHash() {
 113         if (dataHash != null) return;
 114         try {
 115             Digest sha = new Digest(DIGEST_TYPE);
 116             StringBuilder data = new StringBuilder();
 117             data.append(profile);
 118             data.append(getId());
 119             data.append('\0');
 120             data.append(getDescription());
 121             data.append('\0');
 122             data.append(Globals.formatLedgerDate(getDate()));
 123             data.append('\0');
 124             for (LedgerTransactionAccount item : accounts) {
 125                 data.append(item.getAccountName());
 126                 data.append('\0');
 127                 data.append(item.getCurrency());
 128                 data.append('\0');
 129                 data.append(item.getAmount());
 130             }
 131             sha.update(data.toString().getBytes(Charset.forName("UTF-8")));
 132             dataHash = sha.digestToHexString();
 133         }
 134         catch (NoSuchAlgorithmException e) {
 135             throw new RuntimeException(
 136                     String.format("Unable to get instance of %s digest", DIGEST_TYPE), e);
 137         }
 138     }
 139     public boolean existsInDb(SQLiteDatabase db) {
 140         fillDataHash();
 141         try (Cursor c = db
 142                 .rawQuery("SELECT 1 from transactions where data_hash = ?", new String[]{dataHash}))
 143         {
 144             boolean result = c.moveToFirst();
 145             debug("db", String.format("Transaction %d (%s) %s", id, dataHash,
 146                     result ? "already present" : "not present"));
 147             return result;
 148         }
 149     }
 150     public void loadData(SQLiteDatabase db) {
 151         if (dataLoaded) return;
 152
 153         try (Cursor cTr = db
 154                 .rawQuery("SELECT date, description from transactions WHERE profile=? AND id=?",
 155                         new String[]{profile, String.valueOf(id)}))
 156         {
 157             if (cTr.moveToFirst()) {
 158                 String dateString = cTr.getString(0);
 159                 try {
 160                     date = Globals.parseLedgerDate(dateString);
 161                 }
 162                 catch (ParseException e) {
 163                     e.printStackTrace();
 164                     throw new RuntimeException(
 165                             String.format("Error parsing date '%s' from " + "transacion %d",
 166                                     dateString, id));
 167                 }
 168                 description = cTr.getString(1);
 169
 170                 try (Cursor cAcc = db.rawQuery("SELECT account_name, amount, currency FROM " +
 171                                                "transaction_accounts WHERE " +
 172                                                "profile=? AND transaction_id = ?",
 173                         new String[]{profile, String.valueOf(id)}))
 174                 {
 175                     while (cAcc.moveToNext()) {
 176 //                        debug("transactions",
 177 //                                String.format("Loaded %d: %s %1.2f %s", id, cAcc.getString(0),
 178 //                                        cAcc.getFloat(1), cAcc.getString(2)));
 179                         addAccount(new LedgerTransactionAccount(cAcc.getString(0), cAcc.getFloat(1),
 180                                 cAcc.getString(2)));
 181                     }
 182
 183                     finishLoading();
 184                 }
 185             }
 186         }
 187
 188     }
 189     public String getDataHash() {
 190         return dataHash;
 191     }
 192     public void finishLoading() {
 193         dataLoaded = true;
 194     }
 195     public ParsedLedgerTransaction toParsedLedgerTransaction() {
 196         ParsedLedgerTransaction result = new ParsedLedgerTransaction();
 197         result.setTcomment("");
 198         result.setTprecedingcomment("");
 199
 200         ArrayList<ParsedPosting> postings = new ArrayList<>();
 201         for (LedgerTransactionAccount acc : accounts) {
 202             if (!acc.getAccountName().isEmpty()) postings.add(acc.asParsedPosting());
 203         }
 204
 205         result.setTpostings(postings);
 206         result.setTdate(Globals.formatIsoDate(date));
 207         result.setTdate2(null);
 208         result.setTindex(1);
 209         result.setTdescription(description);
 210         return result;
 211     }
 212 }