X-Git-Url: https://git.ktnx.net/?p=mobile-ledger.git;a=blobdiff_plain;f=app%2Fsrc%2Fmain%2Fjava%2Fnet%2Fktnx%2Fmobileledger%2Fmodel%2FLedgerTransaction.java;h=7b63a59a3ef6c8839df40b8ff5abfe5a8051cae7;hp=a103ab3951d92c0ef643f81dbaf15f45c52c1a1c;hb=6ea8c7c196778dda4496d23541b059ec78cba76d;hpb=6b740c280c79b0170321f533747cdbfc3e179a29

diff --git a/app/src/main/java/net/ktnx/mobileledger/model/LedgerTransaction.java b/app/src/main/java/net/ktnx/mobileledger/model/LedgerTransaction.java
index a103ab39..7b63a59a 100644
--- a/app/src/main/java/net/ktnx/mobileledger/model/LedgerTransaction.java
+++ b/app/src/main/java/net/ktnx/mobileledger/model/LedgerTransaction.java
@@ -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
@@ -17,73 +17,154 @@
 
 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.Iterator;
-import java.util.List;
+import java.util.Comparator;
+import java.util.Date;
 
 public class LedgerTransaction {
-    private String id;
-    private String date;
+    private static final String DIGEST_TYPE = "SHA-256";
+    public final Comparator<LedgerTransactionAccount> comparator =
+            new Comparator<LedgerTransactionAccount>() {
+                @Override
+                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());
+                    if (res != 0) return res;
+                    return Float.compare(o1.getAmount(), o2.getAmount());
+                }
+            };
+    private String profile;
+    private Integer id;
+    private Date date;
     private String description;
-    private List<LedgerTransactionItem> items;
-
-    public LedgerTransaction(String id, String date, String description) {
+    private ArrayList<LedgerTransactionAccount> accounts;
+    private String dataHash;
+    private boolean dataLoaded;
+    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(String date, String description) {
+    public LedgerTransaction(Date date, String description) {
         this(null, date, description);
     }
-    public void add_item(LedgerTransactionItem item) {
-        items.add(item);
+    public LedgerTransaction(int id) {
+        this(id, (Date) null, null);
     }
-
-    public String getDate() {
+    public ArrayList<LedgerTransactionAccount> getAccounts() {
+        return accounts;
+    }
+    public void addAccount(LedgerTransactionAccount item) {
+        accounts.add(item);
+        dataHash = null;
+    }
+    public Date getDate() {
         return date;
     }
-
-    public void setDate(String date) {
+    public void setDate(Date date) {
         this.date = date;
+        dataHash = null;
     }
-
     public String getDescription() {
         return description;
     }
-
     public void setDescription(String description) {
         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 int getId() {
+        return id;
+    }
+    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');
+            data.append(Globals.formatLedgerDate(getDate()));
+            data.append('\0');
+            for (LedgerTransactionAccount item : accounts) {
+                data.append(item.getAccountName());
+                data.append('\0');
+                data.append(item.getCurrency());
+                data.append('\0');
+                data.append(item.getAmount());
             }
-        };
+            sha.update(data.toString().getBytes(Charset.forName("UTF-8")));
+            dataHash = sha.digestToHexString();
+        }
+        catch (NoSuchAlgorithmException e) {
+            throw new RuntimeException(
+                    String.format("Unable to get instance of %s digest", DIGEST_TYPE), e);
+        }
     }
-    public String getId() {
-        return id;
+    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;
 
-    public void insertInto(SQLiteDatabase db) {
-        db.execSQL("INSERT INTO transactions(id, date, " + "description) values(?, ?, ?)",
-                new String[]{id, date, description});
+        try (Cursor cTr = db
+                .rawQuery("SELECT date, description from transactions WHERE profile=? AND id=?",
+                        new String[]{profile, String.valueOf(id)}))
+        {
+            if (cTr.moveToFirst()) {
+                String dateString = cTr.getString(0);
+                date = Globals.parseLedgerDate(dateString);
+                description = cTr.getString(1);
 
-        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()});
+                try (Cursor cAcc = db.rawQuery("SELECT account_name, amount, currency FROM " +
+                                               "transaction_accounts WHERE " +
+                                               "profile=? AND transaction_id = ?",
+                        new String[]{profile, String.valueOf(id)}))
+                {
+                    while (cAcc.moveToNext()) {
+//                        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)));
+                    }
+
+                    finishLoading();
+                }
+            }
         }
+
+    }
+    public String getDataHash() {
+        return dataHash;
+    }
+    public void finishLoading() {
+        dataLoaded = true;
     }
 }