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.content.Context;
  21 import android.content.Intent;
  22 import android.net.Uri;
  23 import android.os.Bundle;
  24 import android.view.MenuItem;
  25 import android.view.View;
  26
  27 import androidx.activity.result.ActivityResultLauncher;
  28 import androidx.activity.result.contract.ActivityResultContracts;
  29 import androidx.appcompat.app.ActionBar;
  30 import androidx.appcompat.app.AppCompatActivity;
  31
  32 import com.google.android.material.snackbar.BaseTransientBottomBar;
  33 import com.google.android.material.snackbar.Snackbar;
  34
  35 import net.ktnx.mobileledger.backup.ConfigReader;
  36 import net.ktnx.mobileledger.backup.ConfigWriter;
  37 import net.ktnx.mobileledger.databinding.FragmentBackupsBinding;
  38 import net.ktnx.mobileledger.model.Data;
  39
  40 import java.io.IOException;
  41 import java.text.DateFormat;
  42 import java.text.SimpleDateFormat;
  43 import java.util.Date;
  44 import java.util.Locale;
  45
  46 public class BackupsActivity extends AppCompatActivity {
  47     private FragmentBackupsBinding b;
  48     private ActivityResultLauncher<String> backupChooserLauncher;
  49     private ActivityResultLauncher<String[]> restoreChooserLauncher;
  50     public static void start(Context context) {
  51         Intent starter = new Intent(context, BackupsActivity.class);
  52         context.startActivity(starter);
  53     }
  54     @Override
  55     protected void onCreate(Bundle savedInstanceState) {
  56         super.onCreate(savedInstanceState);
  57         b = FragmentBackupsBinding.inflate(getLayoutInflater());
  58         setContentView(b.getRoot());
  59
  60         setSupportActionBar(b.toolbar);
  61         // Show the Up button in the action bar.
  62         ActionBar actionBar = getSupportActionBar();
  63         if (actionBar != null) {
  64             actionBar.setDisplayHomeAsUpEnabled(true);
  65         }
  66
  67         b.backupButton.setOnClickListener(this::backupClicked);
  68         b.restoreButton.setOnClickListener(this::restoreClicked);
  69
  70
  71         backupChooserLauncher =
  72                 registerForActivityResult(new ActivityResultContracts.CreateDocument(),
  73                         this::storeConfig);
  74         restoreChooserLauncher =
  75                 registerForActivityResult(new ActivityResultContracts.OpenDocument(),
  76                         this::readConfig);
  77
  78         Data.observeProfile(this, p -> {
  79             if (p == null) {
  80                 b.backupButton.setEnabled(false);
  81                 b.backupExplanationText.setEnabled(false);
  82             }
  83             else {
  84                 b.backupButton.setEnabled(true);
  85                 b.backupExplanationText.setEnabled(true);
  86             }
  87         });
  88     }
  89     @Override
  90     public boolean onOptionsItemSelected(MenuItem item) {
  91         if (item.getItemId() == android.R.id.home) {
  92             finish();
  93
  94             return true;
  95         }
  96         return super.onOptionsItemSelected(item);
  97     }
  98     private void storeConfig(Uri result) {
  99         if (result == null)
 100             return;
 101
 102         try {
 103             ConfigWriter saver =
 104                     new ConfigWriter(getBaseContext(), result, new ConfigWriter.OnErrorListener() {
 105                         @Override
 106                         public void error(Exception e) {
 107                             Snackbar.make(b.backupButton, e.toString(),
 108                                     BaseTransientBottomBar.LENGTH_LONG)
 109                                     .show();
 110                         }
 111                     }, new ConfigWriter.OnDoneListener() {
 112                         public void done() {
 113                             Snackbar.make(b.backupButton, R.string.config_saved,
 114                                     Snackbar.LENGTH_LONG)
 115                                     .show();
 116                         }
 117                     });
 118             saver.start();
 119         }
 120         catch (IOException e) {
 121             e.printStackTrace();
 122         }
 123
 124     }
 125     private void readConfig(Uri result) {
 126         if (result == null)
 127             return;
 128
 129         try {
 130             ConfigReader reader =
 131                     new ConfigReader(getBaseContext(), result, new ConfigWriter.OnErrorListener() {
 132                         @Override
 133                         public void error(Exception e) {
 134                             Snackbar.make(b.backupButton, e.toString(),
 135                                     BaseTransientBottomBar.LENGTH_LONG)
 136                                     .show();
 137                         }
 138                     }, new ConfigReader.OnDoneListener() {
 139                         public void done() {
 140                             Snackbar.make(b.backupButton, R.string.config_restored,
 141                                     Snackbar.LENGTH_LONG)
 142                                     .show();
 143                         }
 144                     });
 145             reader.start();
 146         }
 147         catch (IOException e) {
 148             e.printStackTrace();
 149         }
 150
 151     }
 152     private void backupClicked(View view) {
 153         final Date now = new Date();
 154         DateFormat df = new SimpleDateFormat("y-MM-dd HH:mm", Locale.getDefault());
 155         df.format(now);
 156         backupChooserLauncher.launch(String.format("MoLe-%s.json", df.format(now)));
 157     }
 158     private void restoreClicked(View view) {
 159         restoreChooserLauncher.launch(new String[]{"application/json"});
 160     }
 161
 162 }