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 import net.ktnx.mobileledger.model.Data;
  37
  38 import java.io.IOException;
  39 import java.text.DateFormat;
  40 import java.text.SimpleDateFormat;
  41 import java.util.Date;
  42 import java.util.Locale;
  43
  44 public class BackupsActivity extends AppCompatActivity {
  45     private FragmentBackupsBinding b;
  46     private ActivityResultLauncher<String> backupChooserLauncher;
  47     private ActivityResultLauncher<String[]> restoreChooserLauncher;
  48     @Override
  49     protected void onCreate(Bundle savedInstanceState) {
  50         super.onCreate(savedInstanceState);
  51         b = FragmentBackupsBinding.inflate(getLayoutInflater());
  52         setContentView(b.getRoot());
  53
  54         setSupportActionBar(b.toolbar);
  55         // Show the Up button in the action bar.
  56         ActionBar actionBar = getSupportActionBar();
  57         if (actionBar != null) {
  58             actionBar.setDisplayHomeAsUpEnabled(true);
  59         }
  60
  61         b.backupButton.setOnClickListener(this::backupClicked);
  62         b.restoreButton.setOnClickListener(this::restoreClicked);
  63
  64
  65         backupChooserLauncher =
  66                 registerForActivityResult(new ActivityResultContracts.CreateDocument(),
  67                         this::storeConfig);
  68         restoreChooserLauncher =
  69                 registerForActivityResult(new ActivityResultContracts.OpenDocument(),
  70                         this::readConfig);
  71
  72         Data.observeProfile(this, p -> {
  73             if (p == null) {
  74                 b.backupButton.setEnabled(false);
  75                 b.backupExplanationText.setEnabled(false);
  76             }
  77             else {
  78                 b.backupButton.setEnabled(true);
  79                 b.backupExplanationText.setEnabled(true);
  80             }
  81         });
  82     }
  83     @Override
  84     public boolean onOptionsItemSelected(MenuItem item) {
  85         if (item.getItemId() == android.R.id.home) {
  86             finish();
  87
  88             return true;
  89         }
  90         return super.onOptionsItemSelected(item);
  91     }
  92     private void storeConfig(Uri result) {
  93         if (result == null)
  94             return;
  95
  96         try {
  97             ConfigWriter saver =
  98                     new ConfigWriter(getBaseContext(), result, new ConfigWriter.OnErrorListener() {
  99                         @Override
 100                         public void error(Exception e) {
 101                             Snackbar.make(b.backupButton, e.toString(),
 102                                     BaseTransientBottomBar.LENGTH_LONG)
 103                                     .show();
 104                         }
 105                     }, new ConfigWriter.OnDoneListener() {
 106                         public void done() {
 107                             Snackbar.make(b.backupButton, R.string.config_saved,
 108                                     Snackbar.LENGTH_LONG)
 109                                     .show();
 110                         }
 111                     });
 112             saver.start();
 113         }
 114         catch (IOException e) {
 115             e.printStackTrace();
 116         }
 117
 118     }
 119     private void readConfig(Uri result) {
 120         if (result == null)
 121             return;
 122
 123         try {
 124             ConfigReader reader =
 125                     new ConfigReader(getBaseContext(), result, new ConfigWriter.OnErrorListener() {
 126                         @Override
 127                         public void error(Exception e) {
 128                             Snackbar.make(b.backupButton, e.toString(),
 129                                     BaseTransientBottomBar.LENGTH_LONG)
 130                                     .show();
 131                         }
 132                     }, new ConfigReader.OnDoneListener() {
 133                         public void done() {
 134                             Snackbar.make(b.backupButton, R.string.config_restored,
 135                                     Snackbar.LENGTH_LONG)
 136                                     .show();
 137                         }
 138                     });
 139             reader.start();
 140         }
 141         catch (IOException e) {
 142             e.printStackTrace();
 143         }
 144
 145     }
 146     private void backupClicked(View view) {
 147         final Date now = new Date();
 148         DateFormat df = new SimpleDateFormat("y-MM-dd HH:mm", Locale.getDefault());
 149         df.format(now);
 150         backupChooserLauncher.launch(String.format("MoLe-%s.json", df.format(now)));
 151     }
 152     private void restoreClicked(View view) {
 153         restoreChooserLauncher.launch(new String[]{"application/json"});
 154     }
 155
 156 }