app/src/main/java/net/ktnx/mobileledger/ui/activity/NewTransactionItemsAdapter.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.database.Cursor;
  21 import android.view.LayoutInflater;
  22 import android.view.ViewGroup;
  23 import android.widget.LinearLayout;
  24
  25 import androidx.annotation.NonNull;
  26 import androidx.recyclerview.widget.ItemTouchHelper;
  27 import androidx.recyclerview.widget.RecyclerView;
  28
  29 import com.google.android.material.snackbar.Snackbar;
  30
  31 import net.ktnx.mobileledger.App;
  32 import net.ktnx.mobileledger.R;
  33 import net.ktnx.mobileledger.async.DescriptionSelectedCallback;
  34 import net.ktnx.mobileledger.model.Data;
  35 import net.ktnx.mobileledger.model.LedgerTransaction;
  36 import net.ktnx.mobileledger.model.LedgerTransactionAccount;
  37 import net.ktnx.mobileledger.model.MobileLedgerProfile;
  38 import net.ktnx.mobileledger.utils.Logger;
  39
  40 import java.util.ArrayList;
  41 import java.util.Locale;
  42
  43 import static net.ktnx.mobileledger.utils.Logger.debug;
  44
  45 class NewTransactionItemsAdapter extends RecyclerView.Adapter<NewTransactionItemHolder>
  46         implements DescriptionSelectedCallback {
  47     NewTransactionModel model;
  48     private MobileLedgerProfile mProfile;
  49     private ItemTouchHelper touchHelper;
  50     private RecyclerView recyclerView;
  51     NewTransactionItemsAdapter(NewTransactionModel viewModel, MobileLedgerProfile profile) {
  52         super();
  53         model = viewModel;
  54         mProfile = profile;
  55         int size = model.getAccountCount();
  56         while (size < 2) {
  57             Logger.debug("new-transaction",
  58                     String.format(Locale.US, "%d accounts is too little, Calling addRow()", size));
  59             size = addRow();
  60         }
  61
  62         NewTransactionItemsAdapter adapter = this;
  63
  64         touchHelper = new ItemTouchHelper(new ItemTouchHelper.Callback() {
  65             @Override
  66             public boolean isLongPressDragEnabled() {
  67                 return true;
  68             }
  69             @Override
  70             public boolean canDropOver(@NonNull RecyclerView recyclerView,
  71                                        @NonNull RecyclerView.ViewHolder current,
  72                                        @NonNull RecyclerView.ViewHolder target) {
  73                 final int adapterPosition = target.getAdapterPosition();
  74
  75                 // first and last items are immovable
  76                 if (adapterPosition == 0)
  77                     return false;
  78                 if (adapterPosition == adapter.getItemCount() - 1)
  79                     return false;
  80
  81                 return super.canDropOver(recyclerView, current, target);
  82             }
  83             @Override
  84             public int getMovementFlags(@NonNull RecyclerView recyclerView,
  85                                         @NonNull RecyclerView.ViewHolder viewHolder) {
  86                 int flags = makeFlag(ItemTouchHelper.ACTION_STATE_IDLE, ItemTouchHelper.END);
  87                 // the top item is always there (date and description)
  88                 if (viewHolder.getAdapterPosition() > 0) {
  89                     flags |= makeFlag(ItemTouchHelper.ACTION_STATE_DRAG,
  90                             ItemTouchHelper.UP | ItemTouchHelper.DOWN);
  91
  92                     if (viewModel.getAccountCount() > 2) {
  93                         flags |= makeFlag(ItemTouchHelper.ACTION_STATE_SWIPE,
  94                                 ItemTouchHelper.START | ItemTouchHelper.END);
  95                     }
  96                 }
  97
  98                 return flags;
  99             }
 100             @Override
 101             public boolean onMove(@NonNull RecyclerView recyclerView,
 102                                   @NonNull RecyclerView.ViewHolder viewHolder,
 103                                   @NonNull RecyclerView.ViewHolder target) {
 104
 105                 model.swapItems(viewHolder.getAdapterPosition(), target.getAdapterPosition());
 106                 notifyItemMoved(viewHolder.getAdapterPosition(), target.getAdapterPosition());
 107                 return true;
 108             }
 109             @Override
 110             public void onSwiped(@NonNull RecyclerView.ViewHolder viewHolder, int direction) {
 111                 int pos = viewHolder.getAdapterPosition();
 112                 viewModel.removeItem(pos - 1);
 113                 notifyItemRemoved(pos);
 114                 viewModel.sendCountNotifications(); // needed after items re-arrangement
 115                 viewModel.checkTransactionSubmittable(adapter);
 116             }
 117         });
 118     }
 119     public void setProfile(MobileLedgerProfile profile) {
 120         mProfile = profile;
 121     }
 122     int addRow() {
 123         final int newAccountCount = model.addAccount(new LedgerTransactionAccount(""));
 124         Logger.debug("new-transaction",
 125                 String.format(Locale.US, "invoking notifyItemInserted(%d)", newAccountCount));
 126         // the header is at position 0
 127         notifyItemInserted(newAccountCount);
 128         model.sendCountNotifications(); // needed after holders' positions have changed
 129         return newAccountCount;
 130     }
 131     @NonNull
 132     @Override
 133     public NewTransactionItemHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
 134         LinearLayout row = (LinearLayout) LayoutInflater.from(parent.getContext())
 135                                                         .inflate(R.layout.new_transaction_row,
 136                                                                 parent, false);
 137
 138         return new NewTransactionItemHolder(row, this);
 139     }
 140     @Override
 141     public void onBindViewHolder(@NonNull NewTransactionItemHolder holder, int position) {
 142         Logger.debug("bind", String.format(Locale.US, "Binding item at position %d", position));
 143         NewTransactionModel.Item item = model.getItem(position);
 144         holder.setData(item);
 145         Logger.debug("bind", String.format(Locale.US, "Bound %s item at position %d", item.getType()
 146                                                                                           .toString(),
 147                 position));
 148     }
 149     @Override
 150     public int getItemCount() {
 151         return model.getAccountCount() + 2;
 152     }
 153     boolean accountListIsEmpty() {
 154         for (int i = 0; i < model.getAccountCount(); i++) {
 155             LedgerTransactionAccount acc = model.getAccount(i);
 156             if (!acc.getAccountName()
 157                     .isEmpty())
 158                 return false;
 159             if (acc.isAmountSet())
 160                 return false;
 161         }
 162
 163         return true;
 164     }
 165     @Override
 166     public void onAttachedToRecyclerView(@NonNull RecyclerView recyclerView) {
 167         super.onAttachedToRecyclerView(recyclerView);
 168         this.recyclerView = recyclerView;
 169         touchHelper.attachToRecyclerView(recyclerView);
 170     }
 171     @Override
 172     public void onDetachedFromRecyclerView(@NonNull RecyclerView recyclerView) {
 173         touchHelper.attachToRecyclerView(null);
 174         super.onDetachedFromRecyclerView(recyclerView);
 175         this.recyclerView = null;
 176     }
 177     public void descriptionSelected(String description) {
 178         debug("descr selected", description);
 179         if (!accountListIsEmpty())
 180             return;
 181
 182         String accFilter = mProfile.getPreferredAccountsFilter();
 183
 184         ArrayList<String> params = new ArrayList<>();
 185         StringBuilder sb = new StringBuilder(
 186                 "select t.profile, t.id from transactions t where t.description=?");
 187         params.add(description);
 188
 189         if (accFilter != null) {
 190             sb.append(" AND EXISTS (")
 191               .append("SELECT 1 FROM transaction_accounts ta ")
 192               .append("WHERE ta.profile = t.profile")
 193               .append(" AND ta.transaction_id = t.id")
 194               .append(" AND UPPER(ta.account_name) LIKE '%'||?||'%')");
 195             params.add(accFilter.toUpperCase());
 196         }
 197
 198         sb.append(" ORDER BY date desc limit 1");
 199
 200         final String sql = sb.toString();
 201         debug("descr", sql);
 202         debug("descr", params.toString());
 203
 204         try (Cursor c = App.getDatabase()
 205                            .rawQuery(sql, params.toArray(new String[]{})))
 206         {
 207             if (!c.moveToNext())
 208                 return;
 209
 210             String profileUUID = c.getString(0);
 211             int transactionId = c.getInt(1);
 212             LedgerTransaction tr;
 213             MobileLedgerProfile profile = Data.getProfile(profileUUID);
 214             if (profile == null)
 215                 throw new RuntimeException(String.format(
 216                         "Unable to find profile %s, which is supposed to contain " +
 217                         "transaction %d with description %s", profileUUID, transactionId,
 218                         description));
 219
 220             tr = profile.loadTransaction(transactionId);
 221             ArrayList<LedgerTransactionAccount> accounts = tr.getAccounts();
 222             NewTransactionModel.Item firstNegative = null;
 223             NewTransactionModel.Item firstPositive = null;
 224             int singleNegativeIndex = -1;
 225             int singlePositiveIndex = -1;
 226             int negativeCount = 0;
 227             for (int i = 0; i < accounts.size(); i++) {
 228                 LedgerTransactionAccount acc = accounts.get(i);
 229                 NewTransactionModel.Item item;
 230                 if (model.getAccountCount() < i + 1) {
 231                     model.addAccount(acc);
 232                     notifyItemInserted(i + 1);
 233                 }
 234                 item = model.getItem(i + 1);
 235
 236                 item.getAccount()
 237                     .setAccountName(acc.getAccountName());
 238                 if (acc.isAmountSet()) {
 239                     item.getAccount()
 240                         .setAmount(acc.getAmount());
 241                     if (acc.getAmount() < 0) {
 242                         if (firstNegative == null) {
 243                             firstNegative = item;
 244                             singleNegativeIndex = i;
 245                         }
 246                         else
 247                             singleNegativeIndex = -1;
 248                     }
 249                     else {
 250                         if (firstPositive == null) {
 251                             firstPositive = item;
 252                             singlePositiveIndex = i;
 253                         }
 254                         else
 255                             singlePositiveIndex = -1;
 256                     }
 257                 }
 258                 else
 259                     item.getAccount()
 260                         .resetAmount();
 261                 notifyItemChanged(i + 1);
 262             }
 263
 264             if (singleNegativeIndex != -1) {
 265                 firstNegative.getAccount()
 266                              .resetAmount();
 267                 model.moveItemLast(singleNegativeIndex);
 268             }
 269             else if (singlePositiveIndex != -1) {
 270                 firstPositive.getAccount()
 271                              .resetAmount();
 272                 model.moveItemLast(singlePositiveIndex);
 273             }
 274         }
 275         model.checkTransactionSubmittable(this);
 276         model.setFocusedItem(1);
 277     }
 278     public void toggleAllEditing(boolean editable) {
 279         // item 0 is the header
 280         for (int i = 0; i <= model.getAccountCount(); i++) {
 281             model.getItem(i)
 282                  .setEditable(editable);
 283             notifyItemChanged(i);
 284             // TODO perhaps do only one notification about the whole range (notifyDatasetChanged)?
 285         }
 286     }
 287     public void reset() {
 288         int presentItemCount = model.getAccountCount();
 289         model.reset();
 290         notifyItemChanged(0);       // header changed
 291         notifyItemRangeChanged(1, 2);    // the two empty rows
 292         if (presentItemCount > 2)
 293             notifyItemRangeRemoved(3, presentItemCount - 2); // all the rest are gone
 294     }
 295     public void updateFocusedItem(int position) {
 296         model.updateFocusedItem(position);
 297     }
 298     public void noteFocusIsOnAccount(int position) {
 299         model.noteFocusChanged(position, NewTransactionModel.FocusedElement.Account);
 300     }
 301     public void noteFocusIsOnAmount(int position) {
 302         model.noteFocusChanged(position, NewTransactionModel.FocusedElement.Amount);
 303     }
 304     public void noteFocusIsOnComment(int position) {
 305         model.noteFocusChanged(position, NewTransactionModel.FocusedElement.Comment);
 306     }
 307     public void toggleComment(int position) {
 308         model.toggleComment(position);
 309     }
 310 }