tangem-app-android-audited/app/src/main/java/com/tangem/presentation/activity/SignPaymentActivity.java

package com.tangem.presentation.activity;

import android.app.Activity;
import android.content.Intent;
import android.content.res.ColorStateList;
import android.graphics.Color;
import android.nfc.NfcAdapter;
import android.nfc.Tag;
import android.nfc.tech.IsoDep;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.KeyEvent;
import android.view.View;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.Toast;

import com.tangem.data.nfc.SignPaymentTask;
import com.tangem.domain.cardReader.CardProtocol;
import com.tangem.domain.cardReader.NfcManager;
import com.tangem.domain.wallet.TangemCard;
import com.tangem.presentation.dialog.NoExtendedLengthSupportDialog;
import com.tangem.presentation.dialog.WaitSecurityDelayDialog;
import com.tangem.util.Util;
import com.tangem.wallet.R;

public class SignPaymentActivity extends AppCompatActivity implements NfcAdapter.ReaderCallback, CardProtocol.Notifications {

    public static final String EXTRA_AMOUNT = "Amount";

    public static final int REQUEST_CODE_SEND_PAYMENT = 1;
    public static final int RESULT_INVALID_PIN = Activity.RESULT_FIRST_USER;
    private TangemCard mCard;
    private TextView tvCardID;
    private NfcManager mNfcManager;
    private static final String logTag = "SignPayment";
    private ProgressBar progressBar;
    private SignPaymentTask signPaymentTask;
    private String amountStr;
    private String feeStr;
    private String outAddressStr;
    private boolean lastReadSuccess = true;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_sign_payment);

        MainActivity.commonInit(getApplicationContext());

        mCard = new TangemCard(getIntent().getStringExtra("UID"));
        mCard.LoadFromBundle(getIntent().getExtras().getBundle("Card"));
        amountStr = getIntent().getStringExtra(EXTRA_AMOUNT);
        feeStr = getIntent().getStringExtra("Fee");
        outAddressStr = getIntent().getStringExtra("Wallet");

        tvCardID = findViewById(R.id.tvCardID);
        tvCardID.setText(mCard.getCIDDescription());

        mNfcManager = new NfcManager(this, this);

        progressBar = findViewById(R.id.progressBar);
        progressBar.setProgressTintList(ColorStateList.valueOf(Color.DKGRAY));
        progressBar.setVisibility(View.INVISIBLE);
    }

    @Override
    public void onTagDiscovered(Tag tag) {
        try {
            // get IsoDep handle and run cardReader thread
            final IsoDep isoDep = IsoDep.get(tag);
            if (isoDep == null) {
                throw new CardProtocol.TangemException(getString(R.string.wrong_tag_err));
            }
            byte UID[] = tag.getId();
            String sUID = Util.byteArrayToHexString(UID);
            Log.v(logTag, "UID: " + sUID);

            if (sUID.equals(mCard.getUID())) {
                if (lastReadSuccess) {
                    isoDep.setTimeout(mCard.getPauseBeforePIN2() + 5000);
                } else {
                    isoDep.setTimeout(mCard.getPauseBeforePIN2() + 65000);
                }
                signPaymentTask = new SignPaymentTask(this, mCard, mNfcManager, isoDep, this, amountStr, feeStr, outAddressStr);
                signPaymentTask.start();
            } else {
                Log.d(logTag, "Mismatch card UID (" + sUID + " instead of " + mCard.getUID() + ")");
                mNfcManager.ignoreTag(isoDep.getTag());
                return;
            }

        } catch (Exception e) {
            e.printStackTrace();
        }

    }

    @Override
    public void onResume() {
        super.onResume();
        mNfcManager.onResume();
    }

    @Override
    public void onPause() {
        mNfcManager.onPause();
        if (signPaymentTask != null) {
            signPaymentTask.cancel(true);
        }
        super.onPause();
    }

    @Override
    public void onStop() {
        // dismiss enable NFC dialog
        mNfcManager.onStop();
        if (signPaymentTask != null) {
            signPaymentTask.cancel(true);
        }
        super.onStop();
    }

    public void OnReadStart(CardProtocol cardProtocol) {
        progressBar.post(() -> {
            progressBar.setVisibility(View.VISIBLE);
            progressBar.setProgress(5);
        });
    }

    public void OnReadFinish(final CardProtocol cardProtocol) {

        signPaymentTask = null;

        if (cardProtocol != null) {
            if (cardProtocol.getError() == null) {
                progressBar.post(() -> {
                    progressBar.setProgress(100);
                    progressBar.setProgressTintList(ColorStateList.valueOf(Color.GREEN));
                });
            } else {
                lastReadSuccess = false;
                if (cardProtocol.getError().getClass().equals(CardProtocol.TangemException_InvalidPIN.class)) {
                    progressBar.post(() -> {
                        progressBar.setProgress(100);
                        progressBar.setProgressTintList(ColorStateList.valueOf(Color.RED));
                    });
                    progressBar.postDelayed(() -> {
                        try {
                            progressBar.setProgress(0);
                            progressBar.setProgressTintList(ColorStateList.valueOf(Color.DKGRAY));
                            progressBar.setVisibility(View.INVISIBLE);
                            Intent intent = new Intent();
                            intent.putExtra("message", "Cannot sign transaction. Make sure you enter correct PIN2!");
                            intent.putExtra("UID", cardProtocol.getCard().getUID());
                            intent.putExtra("Card", cardProtocol.getCard().getAsBundle());
                            setResult(RESULT_INVALID_PIN, intent);
                            finish();
                        } catch (Exception e) {
                            e.printStackTrace();
                        }
                    }, 500);
                    return;
                } else {
                    progressBar.post(() -> {
                        if (cardProtocol.getError() instanceof CardProtocol.TangemException_ExtendedLengthNotSupported) {
                            if (!NoExtendedLengthSupportDialog.allreadyShowed) {
                                new NoExtendedLengthSupportDialog().show(getFragmentManager(), NoExtendedLengthSupportDialog.TAG);
                            }
                        } else {
                            Toast.makeText(getBaseContext(), R.string.try_to_scan_again, Toast.LENGTH_LONG).show();
                        }
                        progressBar.setProgress(100);
                        progressBar.setProgressTintList(ColorStateList.valueOf(Color.RED));
                    });

                }

            }
        }

        progressBar.postDelayed(() -> {
            try {
                progressBar.setProgress(0);
                progressBar.setProgressTintList(ColorStateList.valueOf(Color.DKGRAY));
                progressBar.setVisibility(View.INVISIBLE);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }, 500);
    }

    public void OnReadProgress(CardProtocol protocol, final int progress) {
        progressBar.post(() -> progressBar.setProgress(progress));
    }

    public void OnReadCancel() {
        signPaymentTask = null;

        progressBar.postDelayed(() -> {
            try {
                progressBar.setProgress(0);
                progressBar.setProgressTintList(ColorStateList.valueOf(Color.DKGRAY));
                progressBar.setVisibility(View.INVISIBLE);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }, 500);
    }

    @Override
    public void OnReadWait(final int msec) {
        WaitSecurityDelayDialog.OnReadWait(this, msec);
    }

    @Override
    public void OnReadBeforeRequest(int timeout) {
        WaitSecurityDelayDialog.onReadBeforeRequest(this, timeout);
    }

    @Override
    public void OnReadAfterRequest() {
        WaitSecurityDelayDialog.onReadAfterRequest(this);
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        switch (keyCode) {
            case KeyEvent.KEYCODE_BACK:
                Intent intent = new Intent();
//                intent.putExtra("message", "Operation canceled");
                setResult(Activity.RESULT_CANCELED, intent);
                finish();
                return true;
        }
        return super.onKeyDown(keyCode, event);
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (requestCode == REQUEST_CODE_SEND_PAYMENT) {
            setResult(resultCode, data);
            finish();
            return;
        }
        super.onActivityResult(requestCode, resultCode, data);
    }

}