transaction list: no crash of the transaction list is not loaded yet and an item...

[mobile-ledger.git] / app / src / main / java / net / ktnx / mobileledger / ui / transaction_list / TransactionListViewModel.java

diff --git a/app/src/main/java/net/ktnx/mobileledger/ui/transaction_list/TransactionListViewModel.java b/app/src/main/java/net/ktnx/mobileledger/ui/transaction_list/TransactionListViewModel.java
index d0c979e6df9b06ea6325fa80c3e906f5f3a78e62..02affd86735f85bf5710f59395e379043c0163fe 100644 (file)
--- a/app/src/main/java/net/ktnx/mobileledger/ui/transaction_list/TransactionListViewModel.java
+++ b/app/src/main/java/net/ktnx/mobileledger/ui/transaction_list/TransactionListViewModel.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
@@ -18,53 +18,41 @@
 package net.ktnx.mobileledger.ui.transaction_list;
 
 import android.arch.lifecycle.ViewModel;
-import android.database.Cursor;
-import android.database.sqlite.SQLiteDatabase;
+import android.os.AsyncTask;
 
-import net.ktnx.mobileledger.model.LedgerTransaction;
-import net.ktnx.mobileledger.model.LedgerTransactionItem;
-import net.ktnx.mobileledger.utils.MobileLedgerDatabase;
+import net.ktnx.mobileledger.async.UpdateTransactionsTask;
+import net.ktnx.mobileledger.model.Data;
+import net.ktnx.mobileledger.model.TransactionListItem;
+import net.ktnx.mobileledger.utils.ObservableValue;
 
-import java.util.ArrayList;
 import java.util.List;
 
 public class TransactionListViewModel extends ViewModel {
+    public static ObservableValue<Boolean> updating = new ObservableValue<>();
+    public static ObservableValue<String> updateError = new ObservableValue<>();
 
-    private List<LedgerTransaction> transactions;
-
-    public List<LedgerTransaction> getTransactions(MobileLedgerDatabase dbh) {
-        if (transactions == null) {
-            transactions = new ArrayList<>();
-            reloadTransactions(dbh);
-        }
-
-        return transactions;
+    public static void scheduleTransactionListReload() {
+        String filter = TransactionListFragment.accountFilter.get();
+        AsyncTask<String, Void, String> task = new UTT();
+        task.execute(filter);
     }
-    private void reloadTransactions(MobileLedgerDatabase dbh) {
-        transactions.clear();
-        String sql = "SELECT id, date, description FROM transactions";
-        sql += " ORDER BY date desc, id desc";
-
-        try (SQLiteDatabase db = dbh.getReadableDatabase()) {
-            try (Cursor cursor = db.rawQuery(sql, null)) {
-                while (cursor.moveToNext()) {
-                    LedgerTransaction tr =
-                            new LedgerTransaction(cursor.getString(0), cursor.getString(1),
-                                    cursor.getString(2));
-                    try (Cursor cAcc = db.rawQuery("SELECT account_name, amount, currency FROM " +
-                                                   "transaction_accounts WHERE transaction_id = ?",
-                            new String[]{tr.getId()}))
-                    {
-                        while (cAcc.moveToNext()) {
-                            tr.add_item(
-                                    new LedgerTransactionItem(cAcc.getString(0), cAcc.getFloat(1),
-                                            cAcc.getString(2)));
-                        }
-                    }
-                    transactions.add(tr);
-                }
-            }
+    public static TransactionListItem getTransactionListItem(int position) {
+        List<TransactionListItem> transactions = Data.transactions.get();
+        if (transactions == null) return null;
+        if (position >= transactions.size() + 1) return null;
+        if (position == transactions.size()) return new TransactionListItem();
+        return transactions.get(position);
+    }
+    public static int getTransactionCount() {
+        List<TransactionListItem> transactions = Data.transactions.get();
+        if (transactions == null) return 0;
+        return transactions.size();
+    }
+    private static class UTT extends UpdateTransactionsTask {
+        @Override
+        protected void onPostExecute(String error) {
+            super.onPostExecute(error);
+            if (error != null) updateError.set(error);
         }
-
     }
 }