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