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/*
* Copyright (C) 2015 Dominik Schürmann <dominik@dominikschuermann.de>
* Copyright (C) 2015 Vincent Breitmoser <v.breitmoser@mugenguild.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.sufficientlysecure.keychain.ui.base;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.os.Bundle;
import android.os.Message;
import android.os.Messenger;
import android.os.Parcelable;
import android.support.v4.app.Fragment;
import org.sufficientlysecure.keychain.R;
import org.sufficientlysecure.keychain.operations.results.InputPendingResult;
import org.sufficientlysecure.keychain.operations.results.OperationResult;
import org.sufficientlysecure.keychain.service.KeychainNewService;
import org.sufficientlysecure.keychain.service.KeychainService;
import org.sufficientlysecure.keychain.service.ServiceProgressHandler;
import org.sufficientlysecure.keychain.service.input.CryptoInputParcel;
import org.sufficientlysecure.keychain.service.input.RequiredInputParcel;
import org.sufficientlysecure.keychain.ui.NfcOperationActivity;
import org.sufficientlysecure.keychain.ui.PassphraseDialogActivity;
import org.sufficientlysecure.keychain.ui.dialog.ProgressDialogFragment;
/**
* All fragments executing crypto operations need to extend this class.
*/
public abstract class CryptoOperationFragment <T extends Parcelable, S extends OperationResult>
extends Fragment {
public static final int REQUEST_CODE_PASSPHRASE = 0x00008001;
public static final int REQUEST_CODE_NFC = 0x00008002;
private void initiateInputActivity(RequiredInputParcel requiredInput) {
switch (requiredInput.mType) {
case NFC_KEYTOCARD:
case NFC_DECRYPT:
case NFC_SIGN: {
Intent intent = new Intent(getActivity(), NfcOperationActivity.class);
intent.putExtra(NfcOperationActivity.EXTRA_REQUIRED_INPUT, requiredInput);
startActivityForResult(intent, REQUEST_CODE_NFC);
return;
}
case PASSPHRASE:
case PASSPHRASE_SYMMETRIC: {
Intent intent = new Intent(getActivity(), PassphraseDialogActivity.class);
intent.putExtra(PassphraseDialogActivity.EXTRA_REQUIRED_INPUT, requiredInput);
startActivityForResult(intent, REQUEST_CODE_PASSPHRASE);
return;
}
}
throw new RuntimeException("Unhandled pending result!");
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == Activity.RESULT_CANCELED) {
onCryptoOperationCancelled();
return;
}
switch (requestCode) {
case REQUEST_CODE_PASSPHRASE: {
if (resultCode == Activity.RESULT_OK && data != null) {
CryptoInputParcel cryptoInput =
data.getParcelableExtra(PassphraseDialogActivity.RESULT_CRYPTO_INPUT);
cryptoOperation(cryptoInput);
return;
}
break;
}
case REQUEST_CODE_NFC: {
if (resultCode == Activity.RESULT_OK && data != null) {
CryptoInputParcel cryptoInput =
data.getParcelableExtra(NfcOperationActivity.RESULT_DATA);
cryptoOperation(cryptoInput);
return;
}
break;
}
default: {
super.onActivityResult(requestCode, resultCode, data);
}
}
}
protected void dismissProgress() {
ProgressDialogFragment progressDialogFragment =
(ProgressDialogFragment) getFragmentManager().findFragmentByTag("progressDialog");
if (progressDialogFragment == null) {
return;
}
progressDialogFragment.dismissAllowingStateLoss();
}
protected abstract T createOperationInput();
protected void cryptoOperation(CryptoInputParcel cryptoInput) {
cryptoOperation(cryptoInput, true);
}
protected void cryptoOperation() {
cryptoOperation(new CryptoInputParcel());
}
protected void cryptoOperation(CryptoInputParcel cryptoInput, boolean showProgress) {
T operationInput = createOperationInput();
if (operationInput == null) {
return;
}
// Send all information needed to service to edit key in other thread
Intent intent = new Intent(getActivity(), KeychainNewService.class);
intent.putExtra(KeychainNewService.EXTRA_OPERATION_INPUT, operationInput);
intent.putExtra(KeychainNewService.EXTRA_CRYPTO_INPUT, cryptoInput);
ServiceProgressHandler saveHandler = new ServiceProgressHandler(getActivity()) {
@Override
public void handleMessage(Message message) {
// handle messages by standard KeychainIntentServiceHandler first
super.handleMessage(message);
if (message.arg1 == MessageStatus.OKAY.ordinal()) {
// get returned data bundle
Bundle returnData = message.getData();
if (returnData == null) {
return;
}
final OperationResult result =
returnData.getParcelable(OperationResult.EXTRA_RESULT);
onHandleResult(result);
}
}
@Override
protected void onSetProgress(String msg, int progress, int max) {
// allow handling of progress in fragment, or delegate upwards
if ( ! onCryptoSetProgress(msg, progress, max)) {
super.onSetProgress(msg, progress, max);
}
}
};
// Create a new Messenger for the communication back
Messenger messenger = new Messenger(saveHandler);
intent.putExtra(KeychainService.EXTRA_MESSENGER, messenger);
if (showProgress) {
saveHandler.showProgressDialog(
getString(R.string.progress_building_key),
ProgressDialog.STYLE_HORIZONTAL, false);
}
getActivity().startService(intent);
}
protected void onCryptoOperationResult(S result) {
if (result.success()) {
onCryptoOperationSuccess(result);
} else {
onCryptoOperationError(result);
}
}
abstract protected void onCryptoOperationSuccess(S result);
protected void onCryptoOperationError(S result) {
result.createNotify(getActivity()).show();
}
protected void onCryptoOperationCancelled() {
}
public void onHandleResult(OperationResult result) {
if (result instanceof InputPendingResult) {
InputPendingResult pendingResult = (InputPendingResult) result;
if (pendingResult.isPending()) {
RequiredInputParcel requiredInput = pendingResult.getRequiredInputParcel();
initiateInputActivity(requiredInput);
return;
}
}
dismissProgress();
try {
// noinspection unchecked, because type erasure :(
onCryptoOperationResult((S) result);
} catch (ClassCastException e) {
throw new AssertionError("bad return class ("
+ result.getClass().getSimpleName() + "), this is a programming error!");
}
}
protected boolean onCryptoSetProgress(String msg, int progress, int max) {
return false;
}
}
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