app/src/main/java/net/ktnx/mobileledger/ui/activity/NewTransactionFragment.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.ui.activity;
  19
  20 import android.content.Context;
  21 import android.os.Bundle;
  22 import android.renderscript.RSInvalidStateException;
  23 import android.view.LayoutInflater;
  24 import android.view.Menu;
  25 import android.view.MenuInflater;
  26 import android.view.MenuItem;
  27 import android.view.View;
  28 import android.view.ViewGroup;
  29
  30 import androidx.annotation.NonNull;
  31 import androidx.annotation.Nullable;
  32 import androidx.fragment.app.Fragment;
  33 import androidx.fragment.app.FragmentActivity;
  34 import androidx.lifecycle.ViewModelProvider;
  35 import androidx.recyclerview.widget.LinearLayoutManager;
  36 import androidx.recyclerview.widget.RecyclerView;
  37
  38 import com.google.android.material.floatingactionbutton.FloatingActionButton;
  39 import com.google.android.material.snackbar.Snackbar;
  40
  41 import net.ktnx.mobileledger.R;
  42 import net.ktnx.mobileledger.model.Data;
  43 import net.ktnx.mobileledger.model.LedgerTransaction;
  44 import net.ktnx.mobileledger.model.LedgerTransactionAccount;
  45 import net.ktnx.mobileledger.model.MobileLedgerProfile;
  46 import net.ktnx.mobileledger.utils.Logger;
  47 import net.ktnx.mobileledger.utils.Misc;
  48
  49 import org.jetbrains.annotations.NotNull;
  50
  51 import java.util.Date;
  52
  53 /**
  54  * A simple {@link Fragment} subclass.
  55  * Activities that contain this fragment must implement the
  56  * {@link OnNewTransactionFragmentInteractionListener} interface
  57  * to handle interaction events.
  58  */
  59
  60 // TODO: offer to undo account remove-on-swipe
  61 // TODO: transaction-level comment
  62
  63 public class NewTransactionFragment extends Fragment {
  64     private NewTransactionItemsAdapter listAdapter;
  65     private NewTransactionModel viewModel;
  66     private RecyclerView list;
  67     private FloatingActionButton fab;
  68     private OnNewTransactionFragmentInteractionListener mListener;
  69     private MobileLedgerProfile mProfile;
  70     public NewTransactionFragment() {
  71         // Required empty public constructor
  72         setHasOptionsMenu(true);
  73     }
  74     @Override
  75     public void onCreateOptionsMenu(@NonNull Menu menu, @NonNull MenuInflater inflater) {
  76         super.onCreateOptionsMenu(menu, inflater);
  77         inflater.inflate(R.menu.new_transaction_fragment, menu);
  78         menu.findItem(R.id.action_reset_new_transaction_activity)
  79             .setOnMenuItemClickListener(item -> {
  80                 listAdapter.reset();
  81                 return true;
  82             });
  83         final MenuItem toggleCurrencyItem = menu.findItem(R.id.toggle_currency);
  84         toggleCurrencyItem.setOnMenuItemClickListener(item -> {
  85             viewModel.toggleCurrencyVisible();
  86             return true;
  87         });
  88         final FragmentActivity activity = getActivity();
  89         if (activity != null)
  90             viewModel.showCurrency.observe(activity, toggleCurrencyItem::setChecked);
  91     }
  92     @Override
  93     public View onCreateView(LayoutInflater inflater, ViewGroup container,
  94                              Bundle savedInstanceState) {
  95         // Inflate the layout for this fragment
  96         return inflater.inflate(R.layout.fragment_new_transaction, container, false);
  97     }
  98
  99     @Override
 100     public void onActivityCreated(@Nullable Bundle savedInstanceState) {
 101         super.onActivityCreated(savedInstanceState);
 102         FragmentActivity activity = getActivity();
 103         if (activity == null)
 104             throw new RSInvalidStateException(
 105                     "getActivity() returned null within onActivityCreated()");
 106
 107         list = activity.findViewById(R.id.new_transaction_accounts);
 108         viewModel = new ViewModelProvider(activity).get(NewTransactionModel.class);
 109         viewModel.observeDataProfile(this);
 110         mProfile = Data.profile.getValue();
 111         listAdapter = new NewTransactionItemsAdapter(viewModel, mProfile);
 112         list.setAdapter(listAdapter);
 113         list.setLayoutManager(new LinearLayoutManager(activity));
 114         Data.profile.observe(getViewLifecycleOwner(), profile -> {
 115             mProfile = profile;
 116             listAdapter.setProfile(profile);
 117         });
 118         listAdapter.notifyDataSetChanged();
 119         viewModel.isSubmittable()
 120                  .observe(getViewLifecycleOwner(), isSubmittable -> {
 121                      if (isSubmittable) {
 122                          if (fab != null) {
 123                              fab.show();
 124                              fab.setEnabled(true);
 125                          }
 126                      }
 127                      else {
 128                          if (fab != null) {
 129                              fab.hide();
 130                          }
 131                      }
 132                  });
 133 //        viewModel.checkTransactionSubmittable(listAdapter);
 134
 135         fab = activity.findViewById(R.id.fab);
 136         fab.setOnClickListener(v -> onFabPressed());
 137
 138         boolean keep = false;
 139
 140         Bundle args = getArguments();
 141         if (args != null) {
 142             String error = args.getString("error");
 143             if (error != null) {
 144                 Logger.debug("new-trans-f", String.format("Got error: %s", error));
 145                 Snackbar.make(list, error, Snackbar.LENGTH_LONG)
 146                         .show();
 147                 keep = true;
 148             }
 149         }
 150
 151         int focused = 0;
 152         if (savedInstanceState != null) {
 153             keep |= savedInstanceState.getBoolean("keep", true);
 154             focused = savedInstanceState.getInt("focused", 0);
 155         }
 156
 157         if (!keep)
 158             viewModel.reset();
 159         else {
 160             viewModel.setFocusedItem(focused);
 161         }
 162     }
 163     @Override
 164     public void onSaveInstanceState(@NonNull Bundle outState) {
 165         super.onSaveInstanceState(outState);
 166         outState.putBoolean("keep", true);
 167         final int focusedItem = viewModel.getFocusedItem();
 168         outState.putInt("focused", focusedItem);
 169     }
 170     private void onFabPressed() {
 171         fab.setEnabled(false);
 172         Misc.hideSoftKeyboard(this);
 173         if (mListener != null) {
 174             Date date = viewModel.getDate();
 175             LedgerTransaction tr =
 176                     new LedgerTransaction(null, date, viewModel.getDescription(), mProfile);
 177
 178             LedgerTransactionAccount emptyAmountAccount = null;
 179             float emptyAmountAccountBalance = 0;
 180             for (int i = 0; i < viewModel.getAccountCount(); i++) {
 181                 LedgerTransactionAccount acc =
 182                         new LedgerTransactionAccount(viewModel.getAccount(i));
 183                 if (acc.getAccountName()
 184                        .trim()
 185                        .isEmpty())
 186                     continue;
 187
 188                 if (acc.isAmountSet()) {
 189                     emptyAmountAccountBalance += acc.getAmount();
 190                 }
 191                 else {
 192                     emptyAmountAccount = acc;
 193                 }
 194
 195                 tr.addAccount(acc);
 196             }
 197
 198             if (emptyAmountAccount != null)
 199                 emptyAmountAccount.setAmount(-emptyAmountAccountBalance);
 200
 201             mListener.onTransactionSave(tr);
 202         }
 203     }
 204
 205     @Override
 206     public void onAttach(@NotNull Context context) {
 207         super.onAttach(context);
 208         if (context instanceof OnNewTransactionFragmentInteractionListener) {
 209             mListener = (OnNewTransactionFragmentInteractionListener) context;
 210         }
 211         else {
 212             throw new RuntimeException(
 213                     context.toString() + " must implement OnFragmentInteractionListener");
 214         }
 215     }
 216
 217     @Override
 218     public void onDetach() {
 219         super.onDetach();
 220         mListener = null;
 221     }
 222
 223     /**
 224      * This interface must be implemented by activities that contain this
 225      * fragment to allow an interaction in this fragment to be communicated
 226      * to the activity and potentially other fragments contained in that
 227      * activity.
 228      * <p>
 229      * See the Android Training lesson <a href=
 230      * "http://developer.android.com/training/basics/fragments/communicating.html"
 231      * >Communicating with Other Fragments</a> for more information.
 232      */
 233     public interface OnNewTransactionFragmentInteractionListener {
 234         void onTransactionSave(LedgerTransaction tr);
 235     }
 236 }