Transaction: include transaction date in the hash
[mobile-ledger.git] / app / src / main / java / net / ktnx / mobileledger / model / LedgerTransaction.java
index fab4ff3e0d1f2988eacd0f06be35687bb20c758e..7b63a59a3ef6c8839df40b8ff5abfe5a8051cae7 100644 (file)
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2018 Damyan Ivanov.
+ * Copyright © 2019 Damyan Ivanov.
  * This file is part of Mobile-Ledger.
  * Mobile-Ledger is free software: you can distribute it and/or modify it
  * under the term of the GNU General Public License as published by
@@ -19,21 +19,23 @@ package net.ktnx.mobileledger.model;
 
 import android.database.Cursor;
 import android.database.sqlite.SQLiteDatabase;
+import android.util.Log;
 
 import net.ktnx.mobileledger.utils.Digest;
+import net.ktnx.mobileledger.utils.Globals;
 
 import java.nio.charset.Charset;
 import java.security.NoSuchAlgorithmException;
 import java.util.ArrayList;
 import java.util.Comparator;
-import java.util.Iterator;
+import java.util.Date;
 
 public class LedgerTransaction {
     private static final String DIGEST_TYPE = "SHA-256";
-    public final Comparator<LedgerTransactionItem> comparator =
-            new Comparator<LedgerTransactionItem>() {
+    public final Comparator<LedgerTransactionAccount> comparator =
+            new Comparator<LedgerTransactionAccount>() {
                 @Override
-                public int compare(LedgerTransactionItem o1, LedgerTransactionItem o2) {
+                public int compare(LedgerTransactionAccount o1, LedgerTransactionAccount o2) {
                     int res = o1.getAccountName().compareTo(o2.getAccountName());
                     if (res != 0) return res;
                     res = o1.getCurrency().compareTo(o2.getCurrency());
@@ -41,37 +43,42 @@ public class LedgerTransaction {
                     return Float.compare(o1.getAmount(), o2.getAmount());
                 }
             };
-    private String id;
-    private String date;
+    private String profile;
+    private Integer id;
+    private Date date;
     private String description;
-    private ArrayList<LedgerTransactionItem> items;
+    private ArrayList<LedgerTransactionAccount> accounts;
     private String dataHash;
     private boolean dataLoaded;
-    public LedgerTransaction(String id, String date, String description) {
+    public LedgerTransaction(Integer id, String dateString, String description) {
+        this(id, Globals.parseLedgerDate(dateString), description);
+    }
+    public LedgerTransaction(Integer id, Date date, String description) {
+        this.profile = Data.profile.get().getUuid();
         this.id = id;
         this.date = date;
         this.description = description;
-        this.items = new ArrayList<>();
+        this.accounts = new ArrayList<>();
         this.dataHash = null;
         dataLoaded = false;
     }
-    public LedgerTransaction(int id, String date, String description) {
-        this(String.valueOf(id), date, description);
-    }
-    public LedgerTransaction(String date, String description) {
+    public LedgerTransaction(Date date, String description) {
         this(null, date, description);
     }
     public LedgerTransaction(int id) {
-        this(id, null, null);
+        this(id, (Date) null, null);
+    }
+    public ArrayList<LedgerTransactionAccount> getAccounts() {
+        return accounts;
     }
-    public void add_item(LedgerTransactionItem item) {
-        items.add(item);
+    public void addAccount(LedgerTransactionAccount item) {
+        accounts.add(item);
         dataHash = null;
     }
-    public String getDate() {
+    public Date getDate() {
         return date;
     }
-    public void setDate(String date) {
+    public void setDate(Date date) {
         this.date = date;
         dataHash = null;
     }
@@ -82,44 +89,22 @@ public class LedgerTransaction {
         this.description = description;
         dataHash = null;
     }
-    public Iterator<LedgerTransactionItem> getItemsIterator() {
-        return new Iterator<LedgerTransactionItem>() {
-            private int pointer = 0;
-            @Override
-            public boolean hasNext() {
-                return pointer < items.size();
-            }
-
-            @Override
-            public LedgerTransactionItem next() {
-                return hasNext() ? items.get(pointer++) : null;
-            }
-        };
-    }
-    public String getId() {
+    public int getId() {
         return id;
     }
-    public void insertInto(SQLiteDatabase db) {
-        fillDataHash();
-        db.execSQL("INSERT INTO transactions(id, date, description, data_hash) values(?,?,?,?)",
-                new String[]{id, date, description});
-
-        for (LedgerTransactionItem item : items) {
-            db.execSQL("INSERT INTO transaction_accounts(transaction_id, account_name, amount, " +
-                       "currency) values(?, ?, ?, ?)",
-                    new Object[]{id, item.getAccountName(), item.getAmount(), item.getCurrency()});
-        }
-    }
-    private void fillDataHash() {
+    protected void fillDataHash() {
         if (dataHash != null) return;
         try {
             Digest sha = new Digest(DIGEST_TYPE);
             StringBuilder data = new StringBuilder();
+            data.append(profile);
             data.append(getId());
             data.append('\0');
             data.append(getDescription());
             data.append('\0');
-            for (LedgerTransactionItem item : items) {
+            data.append(Globals.formatLedgerDate(getDate()));
+            data.append('\0');
+            for (LedgerTransactionAccount item : accounts) {
                 data.append(item.getAccountName());
                 data.append('\0');
                 data.append(item.getCurrency());
@@ -134,29 +119,52 @@ public class LedgerTransaction {
                     String.format("Unable to get instance of %s digest", DIGEST_TYPE), e);
         }
     }
+    public boolean existsInDb(SQLiteDatabase db) {
+        fillDataHash();
+        try (Cursor c = db
+                .rawQuery("SELECT 1 from transactions where data_hash = ?", new String[]{dataHash}))
+        {
+            boolean result = c.moveToFirst();
+            Log.d("db", String.format("Transaction %d (%s) %s", id, dataHash,
+                    result ? "already present" : "not present"));
+            return result;
+        }
+    }
     public void loadData(SQLiteDatabase db) {
         if (dataLoaded) return;
 
-        try (Cursor cTr = db.rawQuery("SELECT date, description from transactions WHERE " +
-                                         "id=?",new String[]{id})) {
+        try (Cursor cTr = db
+                .rawQuery("SELECT date, description from transactions WHERE profile=? AND id=?",
+                        new String[]{profile, String.valueOf(id)}))
+        {
             if (cTr.moveToFirst()) {
-                date = cTr.getString(0);
+                String dateString = cTr.getString(0);
+                date = Globals.parseLedgerDate(dateString);
                 description = cTr.getString(1);
 
                 try (Cursor cAcc = db.rawQuery("SELECT account_name, amount, currency FROM " +
-                                               "transaction_accounts WHERE transaction_id = ?",
-                        new String[]{id}))
+                                               "transaction_accounts WHERE " +
+                                               "profile=? AND transaction_id = ?",
+                        new String[]{profile, String.valueOf(id)}))
                 {
                     while (cAcc.moveToNext()) {
-                        add_item(
-                                new LedgerTransactionItem(cAcc.getString(0), cAcc.getFloat(1),
-                                        cAcc.getString(2)));
+//                        Log.d("transactions",
+//                                String.format("Loaded %d: %s %1.2f %s", id, cAcc.getString(0),
+//                                        cAcc.getFloat(1), cAcc.getString(2)));
+                        addAccount(new LedgerTransactionAccount(cAcc.getString(0), cAcc.getFloat(1),
+                                cAcc.getString(2)));
                     }
 
-                    dataLoaded = true;
+                    finishLoading();
                 }
             }
         }
 
     }
+    public String getDataHash() {
+        return dataHash;
+    }
+    public void finishLoading() {
+        dataLoaded = true;
+    }
 }