app/src/main/java/net/ktnx/mobileledger/BackupsActivity.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;
  19
  20 import android.net.Uri;
  21 import android.os.Bundle;
  22 import android.view.MenuItem;
  23 import android.view.View;
  24
  25 import androidx.activity.result.ActivityResultLauncher;
  26 import androidx.activity.result.contract.ActivityResultContracts;
  27 import androidx.appcompat.app.ActionBar;
  28 import androidx.appcompat.app.AppCompatActivity;
  29
  30 import com.google.android.material.snackbar.BaseTransientBottomBar;
  31 import com.google.android.material.snackbar.Snackbar;
  32
  33 import net.ktnx.mobileledger.async.ConfigReader;
  34 import net.ktnx.mobileledger.async.ConfigWriter;
  35 import net.ktnx.mobileledger.databinding.FragmentBackupsBinding;
  36
  37 import java.io.IOException;
  38 import java.text.DateFormat;
  39 import java.text.SimpleDateFormat;
  40 import java.util.Date;
  41 import java.util.Locale;
  42
  43 public class BackupsActivity extends AppCompatActivity {
  44     private FragmentBackupsBinding b;
  45     private ActivityResultLauncher<String> backupChooserLauncher;
  46     private ActivityResultLauncher<String[]> restoreChooserLauncher;
  47     @Override
  48     protected void onCreate(Bundle savedInstanceState) {
  49         super.onCreate(savedInstanceState);
  50         b = FragmentBackupsBinding.inflate(getLayoutInflater());
  51         setContentView(b.getRoot());
  52
  53         setSupportActionBar(b.toolbar);
  54         // Show the Up button in the action bar.
  55         ActionBar actionBar = getSupportActionBar();
  56         if (actionBar != null) {
  57             actionBar.setDisplayHomeAsUpEnabled(true);
  58         }
  59
  60         b.backupButton.setOnClickListener(this::backupClicked);
  61         b.restoreButton.setOnClickListener(this::restoreClicked);
  62
  63
  64         backupChooserLauncher =
  65                 registerForActivityResult(new ActivityResultContracts.CreateDocument(),
  66                         this::storeConfig);
  67         restoreChooserLauncher =
  68                 registerForActivityResult(new ActivityResultContracts.OpenDocument(),
  69                         this::readConfig);
  70     }
  71     @Override
  72     public boolean onOptionsItemSelected(MenuItem item) {
  73         if (item.getItemId() == android.R.id.home) {
  74             finish();
  75
  76             return true;
  77         }
  78         return super.onOptionsItemSelected(item);
  79     }
  80     private void storeConfig(Uri result) {
  81         if (result == null)
  82             return;
  83
  84         try {
  85             ConfigWriter saver =
  86                     new ConfigWriter(getBaseContext(), result, new ConfigWriter.OnErrorListener() {
  87                         @Override
  88                         public void error(Exception e) {
  89                             Snackbar.make(b.backupButton, e.toString(),
  90                                     BaseTransientBottomBar.LENGTH_LONG)
  91                                     .show();
  92                         }
  93                     }, new ConfigWriter.OnDoneListener() {
  94                         public void done() {
  95                             Snackbar.make(b.backupButton, R.string.config_saved,
  96                                     Snackbar.LENGTH_LONG)
  97                                     .show();
  98                         }
  99                     });
 100             saver.start();
 101         }
 102         catch (IOException e) {
 103             e.printStackTrace();
 104         }
 105
 106     }
 107     private void readConfig(Uri result) {
 108         if (result == null)
 109             return;
 110
 111         try {
 112             ConfigReader reader =
 113                     new ConfigReader(getBaseContext(), result, new ConfigWriter.OnErrorListener() {
 114                         @Override
 115                         public void error(Exception e) {
 116                             Snackbar.make(b.backupButton, e.toString(),
 117                                     BaseTransientBottomBar.LENGTH_LONG)
 118                                     .show();
 119                         }
 120                     }, new ConfigReader.OnDoneListener() {
 121                         public void done() {
 122                             Snackbar.make(b.backupButton, R.string.config_restored,
 123                                     Snackbar.LENGTH_LONG)
 124                                     .show();
 125                         }
 126                     });
 127             reader.start();
 128         }
 129         catch (IOException e) {
 130             e.printStackTrace();
 131         }
 132
 133     }
 134     private void backupClicked(View view) {
 135         final Date now = new Date();
 136         DateFormat df = new SimpleDateFormat("y-MM-dd HH:mm", Locale.getDefault());
 137         df.format(now);
 138         backupChooserLauncher.launch(String.format("MoLe-%s.json", df.format(now)));
 139     }
 140     private void restoreClicked(View view) {
 141         restoreChooserLauncher.launch(new String[]{"application/json"});
 142     }
 143
 144 }