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 import android.widget.ProgressBar;
  30
  31 import androidx.annotation.NonNull;
  32 import androidx.annotation.Nullable;
  33 import androidx.fragment.app.Fragment;
  34 import androidx.fragment.app.FragmentActivity;
  35 import androidx.lifecycle.ViewModelProvider;
  36 import androidx.recyclerview.widget.LinearLayoutManager;
  37 import androidx.recyclerview.widget.RecyclerView;
  38
  39 import com.google.android.material.floatingactionbutton.FloatingActionButton;
  40 import com.google.android.material.snackbar.Snackbar;
  41
  42 import net.ktnx.mobileledger.R;
  43 import net.ktnx.mobileledger.model.Data;
  44 import net.ktnx.mobileledger.model.LedgerTransaction;
  45 import net.ktnx.mobileledger.model.LedgerTransactionAccount;
  46 import net.ktnx.mobileledger.model.MobileLedgerProfile;
  47 import net.ktnx.mobileledger.utils.Logger;
  48 import net.ktnx.mobileledger.utils.Misc;
  49
  50 import org.jetbrains.annotations.NotNull;
  51
  52 import java.util.Date;
  53
  54 /**
  55  * A simple {@link Fragment} subclass.
  56  * Activities that contain this fragment must implement the
  57  * {@link OnNewTransactionFragmentInteractionListener} interface
  58  * to handle interaction events.
  59  */
  60
  61 // TODO: offer to undo account remove-on-swipe
  62 // TODO: transaction-level comment
  63
  64 public class NewTransactionFragment extends Fragment {
  65     private NewTransactionItemsAdapter listAdapter;
  66     private NewTransactionModel viewModel;
  67     private RecyclerView list;
  68     private FloatingActionButton fab;
  69     private OnNewTransactionFragmentInteractionListener mListener;
  70     private MobileLedgerProfile mProfile;
  71     public NewTransactionFragment() {
  72         // Required empty public constructor
  73         setHasOptionsMenu(true);
  74     }
  75     @Override
  76     public void onCreateOptionsMenu(@NonNull Menu menu, @NonNull MenuInflater inflater) {
  77         super.onCreateOptionsMenu(menu, inflater);
  78         inflater.inflate(R.menu.new_transaction_fragment, menu);
  79         menu.findItem(R.id.action_reset_new_transaction_activity)
  80             .setOnMenuItemClickListener(item -> {
  81                 listAdapter.reset();
  82                 return true;
  83             });
  84         final MenuItem toggleCurrencyItem = menu.findItem(R.id.toggle_currency);
  85         toggleCurrencyItem.setOnMenuItemClickListener(item -> {
  86             viewModel.toggleCurrencyVisible();
  87             return true;
  88         });
  89         final FragmentActivity activity = getActivity();
  90         if (activity != null)
  91             viewModel.showCurrency.observe(activity, toggleCurrencyItem::setChecked);
  92     }
  93     @Override
  94     public View onCreateView(LayoutInflater inflater, ViewGroup container,
  95                              Bundle savedInstanceState) {
  96         // Inflate the layout for this fragment
  97         return inflater.inflate(R.layout.fragment_new_transaction, container, false);
  98     }
  99
 100     @Override
 101     public void onActivityCreated(@Nullable Bundle savedInstanceState) {
 102         super.onActivityCreated(savedInstanceState);
 103         FragmentActivity activity = getActivity();
 104         if (activity == null)
 105             throw new RSInvalidStateException(
 106                     "getActivity() returned null within onActivityCreated()");
 107
 108         list = activity.findViewById(R.id.new_transaction_accounts);
 109         viewModel = new ViewModelProvider(activity).get(NewTransactionModel.class);
 110         viewModel.observeDataProfile(this);
 111         mProfile = Data.profile.getValue();
 112         listAdapter = new NewTransactionItemsAdapter(viewModel, mProfile);
 113         list.setAdapter(listAdapter);
 114         list.setLayoutManager(new LinearLayoutManager(activity));
 115         Data.profile.observe(getViewLifecycleOwner(), profile -> {
 116             mProfile = profile;
 117             listAdapter.setProfile(profile);
 118         });
 119         listAdapter.notifyDataSetChanged();
 120         viewModel.isSubmittable()
 121                  .observe(getViewLifecycleOwner(), isSubmittable -> {
 122                      if (isSubmittable) {
 123                          if (fab != null) {
 124                              fab.show();
 125                              fab.setEnabled(true);
 126                          }
 127                      }
 128                      else {
 129                          if (fab != null) {
 130                              fab.hide();
 131                          }
 132                      }
 133                  });
 134 //        viewModel.checkTransactionSubmittable(listAdapter);
 135
 136         fab = activity.findViewById(R.id.fab);
 137         fab.setOnClickListener(v -> onFabPressed());
 138
 139         boolean keep = false;
 140
 141         Bundle args = getArguments();
 142         if (args != null) {
 143             String error = args.getString("error");
 144             if (error != null) {
 145                 Logger.debug("new-trans-f", String.format("Got error: %s", error));
 146                 Snackbar.make(list, error, Snackbar.LENGTH_LONG)
 147                         .show();
 148                 keep = true;
 149             }
 150         }
 151
 152         int focused = 0;
 153         if (savedInstanceState != null) {
 154             keep |= savedInstanceState.getBoolean("keep", true);
 155             focused = savedInstanceState.getInt("focused", 0);
 156         }
 157
 158         if (!keep)
 159             viewModel.reset();
 160         else {
 161             viewModel.setFocusedItem(focused);
 162         }
 163
 164         ProgressBar p = activity.findViewById(R.id.progressBar);
 165         viewModel.observeBusyFlag(getViewLifecycleOwner(), isBusy -> {
 166             if (isBusy) {
 167 //                Handler h = new Handler();
 168 //                h.postDelayed(() -> {
 169 //                    if (viewModel.getBusyFlag())
 170 //                        p.setVisibility(View.VISIBLE);
 171 //
 172 //                }, 10);
 173                         p.setVisibility(View.VISIBLE);
 174             }
 175             else
 176                 p.setVisibility(View.INVISIBLE);
 177         });
 178     }
 179     @Override
 180     public void onSaveInstanceState(@NonNull Bundle outState) {
 181         super.onSaveInstanceState(outState);
 182         outState.putBoolean("keep", true);
 183         final int focusedItem = viewModel.getFocusedItem();
 184         outState.putInt("focused", focusedItem);
 185     }
 186     private void onFabPressed() {
 187         fab.setEnabled(false);
 188         Misc.hideSoftKeyboard(this);
 189         if (mListener != null) {
 190             Date date = viewModel.getDate();
 191             LedgerTransaction tr =
 192                     new LedgerTransaction(null, date, viewModel.getDescription(), mProfile);
 193
 194             LedgerTransactionAccount emptyAmountAccount = null;
 195             float emptyAmountAccountBalance = 0;
 196             for (int i = 0; i < viewModel.getAccountCount(); i++) {
 197                 LedgerTransactionAccount acc =
 198                         new LedgerTransactionAccount(viewModel.getAccount(i));
 199                 if (acc.getAccountName()
 200                        .trim()
 201                        .isEmpty())
 202                     continue;
 203
 204                 if (acc.isAmountSet()) {
 205                     emptyAmountAccountBalance += acc.getAmount();
 206                 }
 207                 else {
 208                     emptyAmountAccount = acc;
 209                 }
 210
 211                 tr.addAccount(acc);
 212             }
 213
 214             if (emptyAmountAccount != null)
 215                 emptyAmountAccount.setAmount(-emptyAmountAccountBalance);
 216
 217             mListener.onTransactionSave(tr);
 218         }
 219     }
 220
 221     @Override
 222     public void onAttach(@NotNull Context context) {
 223         super.onAttach(context);
 224         if (context instanceof OnNewTransactionFragmentInteractionListener) {
 225             mListener = (OnNewTransactionFragmentInteractionListener) context;
 226         }
 227         else {
 228             throw new RuntimeException(
 229                     context.toString() + " must implement OnFragmentInteractionListener");
 230         }
 231     }
 232
 233     @Override
 234     public void onDetach() {
 235         super.onDetach();
 236         mListener = null;
 237     }
 238
 239     /**
 240      * This interface must be implemented by activities that contain this
 241      * fragment to allow an interaction in this fragment to be communicated
 242      * to the activity and potentially other fragments contained in that
 243      * activity.
 244      * <p>
 245      * See the Android Training lesson <a href=
 246      * "http://developer.android.com/training/basics/fragments/communicating.html"
 247      * >Communicating with Other Fragments</a> for more information.
 248      */
 249     public interface OnNewTransactionFragmentInteractionListener {
 250         void onTransactionSave(LedgerTransaction tr);
 251     }
 252 }