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