+/*
+ * Copyright © 2019 Damyan Ivanov.
+ * This file is part of MoLe.
+ * MoLe is free software: you can distribute it and/or modify it
+ * under the term of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your opinion), any later version.
+ *
+ * MoLe is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License terms for details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with MoLe. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package net.ktnx.mobileledger.ui.activity;
+
+import android.app.Activity;
+import android.content.Context;
+import android.os.Bundle;
+import android.renderscript.RSInvalidStateException;
+import android.view.LayoutInflater;
+import android.view.Menu;
+import android.view.MenuInflater;
+import android.view.View;
+import android.view.ViewGroup;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.fragment.app.Fragment;
+import androidx.lifecycle.ViewModelProviders;
+import androidx.recyclerview.widget.ItemTouchHelper;
+import androidx.recyclerview.widget.LinearLayoutManager;
+import androidx.recyclerview.widget.RecyclerView;
+
+import com.google.android.material.floatingactionbutton.FloatingActionButton;
+import com.google.android.material.snackbar.Snackbar;
+
+import net.ktnx.mobileledger.R;
+import net.ktnx.mobileledger.model.Data;
+import net.ktnx.mobileledger.model.LedgerTransaction;
+import net.ktnx.mobileledger.model.LedgerTransactionAccount;
+import net.ktnx.mobileledger.model.MobileLedgerProfile;
+
+import org.jetbrains.annotations.NotNull;
+
+import java.util.Date;
+
+/**
+ * A simple {@link Fragment} subclass.
+ * Activities that contain this fragment must implement the
+ * {@link OnNewTransactionFragmentInteractionListener} interface
+ * to handle interaction events.
+ */
+public class NewTransactionFragment extends Fragment {
+ private NewTransactionItemsAdapter listAdapter;
+ private NewTransactionModel viewModel;
+ private RecyclerView list;
+ private FloatingActionButton fab;
+ private OnNewTransactionFragmentInteractionListener mListener;
+ private MobileLedgerProfile mProfile;
+ public NewTransactionFragment() {
+ // Required empty public constructor
+ setHasOptionsMenu(true);
+ }
+ @Override
+ public void onCreateOptionsMenu(@NonNull Menu menu, @NonNull MenuInflater inflater) {
+ super.onCreateOptionsMenu(menu, inflater);
+ inflater.inflate(R.menu.new_transaction_fragment, menu);
+ menu.findItem(R.id.action_reset_new_transaction_activity)
+ .setOnMenuItemClickListener(item -> {
+ listAdapter.reset();
+ return true;
+ });
+ }
+ @Override
+ public View onCreateView(LayoutInflater inflater, ViewGroup container,
+ Bundle savedInstanceState) {
+ // Inflate the layout for this fragment
+ return inflater.inflate(R.layout.fragment_new_transaction, container, false);
+ }
+
+ @Override
+ public void onActivityCreated(@Nullable Bundle savedInstanceState) {
+ super.onActivityCreated(savedInstanceState);
+ Activity activity = getActivity();
+ if (activity == null)
+ throw new RSInvalidStateException(
+ "getActivity() returned null within onActivityCreated()");
+
+ list = activity.findViewById(R.id.new_transaction_accounts);
+ viewModel = ViewModelProviders.of(this)
+ .get(NewTransactionModel.class);
+ mProfile = Data.profile.getValue();
+ listAdapter = new NewTransactionItemsAdapter(viewModel, mProfile);
+ list.setAdapter(listAdapter);
+ list.setLayoutManager(new LinearLayoutManager(activity));
+ Data.profile.observe(this, profile -> {
+ mProfile = profile;
+ listAdapter.setProfile(profile);
+ });
+ listAdapter.notifyDataSetChanged();
+ new ItemTouchHelper(new ItemTouchHelper.Callback() {
+ @Override
+ public int getMovementFlags(@NonNull RecyclerView recyclerView,
+ @NonNull RecyclerView.ViewHolder viewHolder) {
+ int flags = makeFlag(ItemTouchHelper.ACTION_STATE_IDLE, ItemTouchHelper.END);
+ // the top item is always there (date and description)
+ if (viewHolder.getAdapterPosition() > 0) {
+ if (viewModel.getAccountCount() > 2) {
+ flags |= makeFlag(ItemTouchHelper.ACTION_STATE_SWIPE,
+ ItemTouchHelper.START | ItemTouchHelper.END);
+ }
+ }
+
+ return flags;
+ }
+ @Override
+ public boolean onMove(@NonNull RecyclerView recyclerView,
+ @NonNull RecyclerView.ViewHolder viewHolder,
+ @NonNull RecyclerView.ViewHolder target) {
+ return false;
+ }
+ @Override
+ public void onSwiped(@NonNull RecyclerView.ViewHolder viewHolder, int direction) {
+ if (viewModel.getAccountCount() == 2)
+ Snackbar.make(list, R.string.msg_at_least_two_accounts_are_required,
+ Snackbar.LENGTH_LONG)
+ .setAction("Action", null)
+ .show();
+ else {
+ int pos = viewHolder.getAdapterPosition();
+ viewModel.removeItem(pos - 1);
+ listAdapter.notifyItemRemoved(pos);
+ viewModel.sendCountNotifications(); // needed after items re-arrangement
+ viewModel.checkTransactionSubmittable(listAdapter);
+ }
+ }
+ }).attachToRecyclerView(list);
+
+ viewModel.isSubmittable()
+ .observe(this, isSubmittable -> {
+ if (isSubmittable) {
+ if (fab != null) {
+ fab.show();
+ fab.setEnabled(true);
+ }
+ }
+ else {
+ if (fab != null) {
+ fab.hide();
+ }
+ }
+ });
+ viewModel.checkTransactionSubmittable(listAdapter);
+
+ fab = activity.findViewById(R.id.fab);
+ fab.setOnClickListener(v -> onFabPressed());
+
+ Bundle args = getArguments();
+ if (args != null) {
+ String error = args.getString("error");
+ if (error != null) {
+ // TODO display error
+ }
+ else {
+ viewModel.reset();
+ }
+ }
+ }
+ private void onFabPressed() {
+ fab.setEnabled(false);
+ if (mListener != null) {
+ Date date = viewModel.getDate();
+ LedgerTransaction tr =
+ new LedgerTransaction(null, date, viewModel.getDescription(), mProfile);
+
+ LedgerTransactionAccount emptyAmountAccount = null;
+ float emptyAmountAccountBalance = 0;
+ for (int i = 0; i < viewModel.getAccountCount(); i++) {
+ LedgerTransactionAccount acc = viewModel.getAccount(i);
+ if (acc.getAccountName()
+ .trim()
+ .isEmpty())
+ continue;
+
+ if (acc.isAmountSet()) {
+ emptyAmountAccountBalance += acc.getAmount();
+ }
+ else {
+ emptyAmountAccount = acc;
+ }
+
+ tr.addAccount(acc);
+ }
+
+ if (emptyAmountAccount != null)
+ emptyAmountAccount.setAmount(-emptyAmountAccountBalance);
+
+ mListener.onTransactionSave(tr);
+ }
+ }
+
+ @Override
+ public void onAttach(@NotNull Context context) {
+ super.onAttach(context);
+ if (context instanceof OnNewTransactionFragmentInteractionListener) {
+ mListener = (OnNewTransactionFragmentInteractionListener) context;
+ }
+ else {
+ throw new RuntimeException(
+ context.toString() + " must implement OnFragmentInteractionListener");
+ }
+ }
+
+ @Override
+ public void onDetach() {
+ super.onDetach();
+ mListener = null;
+ }
+
+ /**
+ * This interface must be implemented by activities that contain this
+ * fragment to allow an interaction in this fragment to be communicated
+ * to the activity and potentially other fragments contained in that
+ * activity.
+ * <p>
+ * See the Android Training lesson <a href=
+ * "http://developer.android.com/training/basics/fragments/communicating.html"
+ * >Communicating with Other Fragments</a> for more information.
+ */
+ public interface OnNewTransactionFragmentInteractionListener {
+ void onTransactionSave(LedgerTransaction tr);
+ }
+}