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