PaperKeyActivity.java

package com.ravenwallet.presenter.activities;

import android.app.Fragment;
import android.app.FragmentManager;
import android.content.res.Resources;
import android.os.Bundle;
import androidx.legacy.app.FragmentPagerAdapter;
import androidx.viewpager.widget.ViewPager;

import android.text.SpannableString;
import android.text.SpannableStringBuilder;
import android.text.style.UnderlineSpan;
import android.util.SparseArray;
import android.util.TypedValue;
import android.view.View;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.ImageButton;
import android.widget.TextView;

import com.google.android.gms.common.util.AndroidUtilsLight;
import com.ravenwallet.R;
import com.ravenwallet.presenter.activities.util.BRActivity;
import com.ravenwallet.presenter.customviews.BRDialogView;
import com.ravenwallet.presenter.fragments.FragmentPhraseWord;
import com.ravenwallet.tools.animation.BRAnimator;
import com.ravenwallet.tools.animation.BRDialog;
import com.ravenwallet.tools.manager.BRReportsManager;
import com.ravenwallet.tools.security.PostAuth;
import com.ravenwallet.tools.util.Utils;

import java.util.Locale;


public class PaperKeyActivity extends BRActivity {
    private static final String TAG = PaperKeyActivity.class.getName();
    private ViewPager wordViewPager;
    private Button nextButton;
    private Button previousButton;
    private TextView itemIndexText;
    private SparseArray<String> wordMap;
    public static boolean appVisible = false;
    private static PaperKeyActivity app;
    private ImageButton close;

    public static PaperKeyActivity getApp() {
        return app;
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_paper_key);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_SECURE, WindowManager.LayoutParams.FLAG_SECURE);

        wordViewPager = (ViewPager) findViewById(R.id.phrase_words_pager);
        wordViewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
            public void onPageScrollStateChanged(int state) {

            }

            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

            }

            public void onPageSelected(int position) {
                if (position == 0)
                    setButtonEnabled(false);
                else
                    setButtonEnabled(true);
                updateItemIndexText();
            }
        });

        nextButton = findViewById(R.id.send_button);
        previousButton = findViewById(R.id.button_previous);
        close = findViewById(R.id.close_button);
        itemIndexText = findViewById(R.id.item_index_text);

        nextButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                updateWordView(true);
            }
        });

        close.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (!BRAnimator.isClickAllowed()) return;
               // Intent intent = new Intent(PaperKeyActivity.this, TermsAndConditionsActivity.class);
               // startActivity(intent);
               // overridePendingTransition(R.anim.enter_from_bottom, R.anim.empty_300);
                if (!isDestroyed()) finish();
            }
        });
        previousButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                updateWordView(false);
            }
        });
        itemIndexText.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if (!BRAnimator.isClickAllowed()) return;
                //Only allow clicking on the final page which has the fast-restore key
                if(wordViewPager.getCurrentItem() != 12) return;
                BRDialog.showCustomDialog(app, app.getString(R.string.RecoverWallet_fastrestore_title), app.getString(R.string.SecurityCenter_fastrestoreExplanation),
                        app.getString(R.string.AccessibilityLabels_close), null, new BRDialogView.BROnClickListener() {
                            @Override
                            public void onClick(BRDialogView brDialogView) {
                                brDialogView.dismissWithAnimation();
                            }
                        }, null, null, 0);
            }
        });

        String cleanPhrase = getIntent().getExtras() == null ? null : getIntent().getStringExtra("phrase");
        wordMap = new SparseArray<>();

        if (Utils.isNullOrEmpty(cleanPhrase)) {
            throw new RuntimeException(TAG + ": cleanPhrase is null");
        }

        String wordArray[] = cleanPhrase.split(" ");

        if (cleanPhrase.charAt(cleanPhrase.length() - 1) == '\0') {
            BRDialog.showCustomDialog(this, getString(R.string.JailbreakWarnings_title),
                    getString(R.string.Alert_keystore_generic_android), getString(R.string.Button_ok), null, new BRDialogView.BROnClickListener() {
                        @Override
                        public void onClick(BRDialogView brDialogView) {
                            brDialogView.dismissWithAnimation();
                        }
                    }, null, null, 0);
            BRReportsManager.reportBug(new IllegalArgumentException("Paper Key error, please contact support at ravenwallet.com: " + wordArray.length), true);
        } else {
            if (wordArray.length != 12) {
                BRReportsManager.reportBug(new IllegalArgumentException("Wrong number of paper keys: " + wordArray.length + ", lang: " + Locale.getDefault().getLanguage()), true);
            }
            WordPagerAdapter adapter = new WordPagerAdapter(getFragmentManager());
            adapter.setWords(wordArray);
            adapter.setFastRestoreKey(Utils.getCurrentFastRestoreKey());
            wordViewPager.setAdapter(adapter);
            for (int i = 0; i < wordArray.length; i++) {
                wordMap.append(i, wordArray[i]);
            }
            updateItemIndexText();
        }

    }

    private void updateWordView(boolean isNext) {
        int currentIndex = wordViewPager.getCurrentItem();
        if (isNext) {
            setButtonEnabled(true);
            if (currentIndex >= wordMap.size()) {
                PostAuth.getInstance().onPhraseProveAuth(this, false);
            } else {
                wordViewPager.setCurrentItem(currentIndex + 1);
            }
        } else {
            if (currentIndex <= 1) {
                wordViewPager.setCurrentItem(currentIndex - 1);
                setButtonEnabled(false);
            } else {
                wordViewPager.setCurrentItem(currentIndex - 1);
            }
        }
    }

    private void setButtonEnabled(boolean b) {
//        previousButton.setTextColor(getColor(b ? R.color.white : R.color.extra_light_gray));
        Resources r = getResources();
        float px = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, b ? 8 : 0, r.getDisplayMetrics());
        previousButton.setElevation(px);
        previousButton.setEnabled(b);
    }

    @Override
    protected void onResume() {
        super.onResume();
        appVisible = true;
        app = this;
    }

    @Override
    protected void onPause() {
        super.onPause();
        appVisible = false;
    }

    private void updateItemIndexText() {
        SpannableString text;
        if(wordViewPager.getCurrentItem() == wordMap.size()){
            //Last item: AKA the fast restore key, Underline it to show it is clickable
            text = new SpannableString(String.format(Locale.getDefault(), getString(R.string.SecurityCenter_fastrestoreDetails)));
            text.setSpan(new UnderlineSpan(), 0, text.length(), 0);
        } else {
            text = new SpannableString(String.format(Locale.getDefault(), getString(R.string.WritePaperPhrase_step), wordViewPager.getCurrentItem() + 1, wordMap.size()));
        }
        itemIndexText.setText(text);
    }


    @Override
    public void onBackPressed() {
        super.onBackPressed();
        overridePendingTransition(R.anim.enter_from_right, R.anim.exit_to_left);
    }

    private class WordPagerAdapter extends FragmentPagerAdapter {

        private String[] words;
        private int fastRestoreKey = -1;

        public WordPagerAdapter(FragmentManager fm) {
            super(fm);
        }

        public void setWords(String[] words) {
            this.words = words;
        }
        public void setFastRestoreKey(int fastRestoreKey) { this.fastRestoreKey = fastRestoreKey; }

        @Override
        public Fragment getItem(int pos) {
            if(pos < words.length)
                return FragmentPhraseWord.newInstance(words[pos]);
            else
                return FragmentPhraseWord.newInstance(Integer.toString(fastRestoreKey));
        }

        @Override
        public int getCount() {
            if(words == null)
                return 0;
            else
                return words.length + (fastRestoreKey == -1 ? 0 : 1);
        }

    }
}