app/src/main/java/net/ktnx/mobileledger/ui/templates/TemplateDetailsViewModel.java

   1 /*
   2  * Copyright © 2021 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.templates;
  19
  20 import android.os.AsyncTask;
  21
  22 import androidx.lifecycle.LiveData;
  23 import androidx.lifecycle.MutableLiveData;
  24 import androidx.lifecycle.Observer;
  25 import androidx.lifecycle.ViewModel;
  26
  27 import net.ktnx.mobileledger.dao.TemplateAccountDAO;
  28 import net.ktnx.mobileledger.dao.TemplateHeaderDAO;
  29 import net.ktnx.mobileledger.db.DB;
  30 import net.ktnx.mobileledger.db.TemplateAccount;
  31 import net.ktnx.mobileledger.db.TemplateHeader;
  32 import net.ktnx.mobileledger.db.TemplateWithAccounts;
  33 import net.ktnx.mobileledger.model.TemplateDetailsItem;
  34 import net.ktnx.mobileledger.utils.Logger;
  35
  36 import java.util.ArrayList;
  37 import java.util.Collections;
  38 import java.util.List;
  39 import java.util.Locale;
  40 import java.util.Objects;
  41
  42 public class TemplateDetailsViewModel extends ViewModel {
  43     private final MutableLiveData<List<TemplateDetailsItem>> items =
  44             new MutableLiveData<>(Collections.emptyList());
  45     private Long mPatternId;
  46     private String mDefaultPatternName;
  47     private boolean itemsLoaded = false;
  48
  49     public String getDefaultPatternName() {
  50         return mDefaultPatternName;
  51     }
  52     public void setDefaultPatternName(String name) {
  53         mDefaultPatternName = name;
  54     }
  55
  56     public void resetItems() {
  57         ArrayList<TemplateDetailsItem> newList = new ArrayList<>();
  58         final TemplateDetailsItem.Header header = TemplateDetailsItem.createHeader();
  59         header.setName(mDefaultPatternName);
  60         header.setId(0);
  61         newList.add(header);
  62
  63         while (newList.size() < 3) {
  64             final TemplateDetailsItem.AccountRow aRow = TemplateDetailsItem.createAccountRow();
  65             aRow.setId(newList.size() + 1);
  66             newList.add(aRow);
  67         }
  68
  69         items.setValue(newList);
  70     }
  71     private void checkItemConsistency() {
  72         ArrayList<TemplateDetailsItem> newList = new ArrayList<>(items.getValue());
  73         boolean changes = false;
  74         if (newList.size() < 1) {
  75             final TemplateDetailsItem.Header header = TemplateDetailsItem.createHeader();
  76             header.setName(mDefaultPatternName);
  77             newList.add(header);
  78             changes = true;
  79         }
  80
  81         while (newList.size() < 3) {
  82             newList.add(TemplateDetailsItem.createAccountRow());
  83             changes = true;
  84         }
  85
  86         if (changes)
  87             items.setValue(newList);
  88     }
  89     public LiveData<List<TemplateDetailsItem>> getItems(Long patternId) {
  90         if (itemsLoaded && Objects.equals(patternId, this.mPatternId))
  91             return items;
  92
  93         if (patternId != null && patternId <= 0)
  94             throw new IllegalArgumentException("Pattern ID " + patternId + " is invalid");
  95
  96         mPatternId = patternId;
  97
  98         if (mPatternId == null) {
  99             resetItems();
 100             itemsLoaded = true;
 101             return items;
 102         }
 103
 104         DB db = DB.get();
 105         LiveData<TemplateWithAccounts> dbList = db.getTemplateDAO()
 106                                                   .getTemplateWithAccounts(mPatternId);
 107         Observer<TemplateWithAccounts> observer = new Observer<TemplateWithAccounts>() {
 108             @Override
 109             public void onChanged(TemplateWithAccounts src) {
 110                 ArrayList<TemplateDetailsItem> l = new ArrayList<>();
 111
 112                 TemplateDetailsItem header = TemplateDetailsItem.fromRoomObject(src.header);
 113                 l.add(header);
 114                 for (TemplateAccount acc : src.accounts) {
 115                     l.add(TemplateDetailsItem.fromRoomObject(acc));
 116                 }
 117
 118                 for (TemplateDetailsItem i : l) {
 119                     Logger.debug("patterns-db", "Loaded pattern item " + i);
 120                 }
 121                 items.postValue(l);
 122                 itemsLoaded = true;
 123
 124                 dbList.removeObserver(this);
 125             }
 126         };
 127         dbList.observeForever(observer);
 128
 129         return items;
 130     }
 131     public void setTestText(String text) {
 132         List<TemplateDetailsItem> list = new ArrayList<>(items.getValue());
 133         TemplateDetailsItem.Header header = new TemplateDetailsItem.Header(list.get(0)
 134                                                                                .asHeaderItem());
 135         header.setTestText(text);
 136         list.set(0, header);
 137
 138         items.setValue(list);
 139     }
 140     public void onSaveTemplate() {
 141         Logger.debug("flow", "PatternDetailsViewModel.onSavePattern(); model=" + this);
 142         final List<TemplateDetailsItem> list = Objects.requireNonNull(items.getValue());
 143
 144         AsyncTask.execute(() -> {
 145             boolean newPattern = mPatternId == null || mPatternId <= 0;
 146
 147             TemplateDetailsItem.Header modelHeader = list.get(0)
 148                                                          .asHeaderItem();
 149             TemplateHeaderDAO headerDAO = DB.get()
 150                                             .getTemplateDAO();
 151             TemplateHeader dbHeader = modelHeader.toDBO();
 152             if (newPattern) {
 153                 dbHeader.setId(null);
 154                 dbHeader.setId(mPatternId = headerDAO.insertSync(dbHeader));
 155             }
 156             else
 157                 headerDAO.updateSync(dbHeader);
 158
 159             Logger.debug("pattern-db",
 160                     String.format(Locale.US, "Stored pattern header %d, item=%s", dbHeader.getId(),
 161                             modelHeader));
 162
 163
 164             TemplateAccountDAO taDAO = DB.get()
 165                                          .getTemplateAccountDAO();
 166             for (int i = 1; i < list.size(); i++) {
 167                 final TemplateDetailsItem.AccountRow accRowItem = list.get(i)
 168                                                                       .asAccountRowItem();
 169                 TemplateAccount dbAccount = accRowItem.toDBO(dbHeader.getId());
 170                 dbAccount.setTemplateId(mPatternId);
 171                 dbAccount.setPosition(i);
 172                 if (newPattern) {
 173                     dbAccount.setId(null);
 174                     dbAccount.setId(taDAO.insertSync(dbAccount));
 175                 }
 176                 else
 177                     taDAO.updateSync(dbAccount);
 178
 179                 Logger.debug("pattern-db", String.format(Locale.US,
 180                         "Stored pattern account %d, account=%s, comment=%s, neg=%s, item=%s",
 181                         dbAccount.getId(), dbAccount.getAccountName(),
 182                         dbAccount.getAccountComment(), dbAccount.getNegateAmount(), accRowItem));
 183             }
 184         });
 185     }
 186 }