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/*
* Copyright (C) 2016 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License
*/
package com.android.dialer.voicemail.settings;
import android.annotation.TargetApi;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.DialogInterface.OnDismissListener;
import android.os.Build.VERSION_CODES;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.annotation.Nullable;
import android.telecom.PhoneAccountHandle;
import android.text.Editable;
import android.text.InputFilter;
import android.text.InputFilter.LengthFilter;
import android.text.TextWatcher;
import android.view.KeyEvent;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.WindowManager;
import android.view.inputmethod.EditorInfo;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.TextView.OnEditorActionListener;
import android.widget.Toast;
import com.android.dialer.common.LogUtil;
import com.android.dialer.common.concurrent.DialerExecutor;
import com.android.dialer.common.concurrent.DialerExecutor.Worker;
import com.android.dialer.common.concurrent.DialerExecutorComponent;
import com.android.dialer.logging.DialerImpression;
import com.android.dialer.logging.Logger;
import com.android.voicemail.PinChanger;
import com.android.voicemail.PinChanger.ChangePinResult;
import com.android.voicemail.PinChanger.PinSpecification;
import com.android.voicemail.VoicemailClient;
import com.android.voicemail.VoicemailComponent;
import java.lang.ref.WeakReference;
/**
* Dialog to change the voicemail PIN. The TUI (Telephony User Interface) PIN is used when accessing
* traditional voicemail through phone call. The intent to launch this activity must contain {@link
* VoicemailClient#PARAM_PHONE_ACCOUNT_HANDLE}
*/
@TargetApi(VERSION_CODES.O)
public class VoicemailChangePinActivity extends Activity
implements OnClickListener, OnEditorActionListener, TextWatcher {
private static final String TAG = "VmChangePinActivity";
public static final String ACTION_CHANGE_PIN = "com.android.dialer.action.CHANGE_PIN";
private static final int MESSAGE_HANDLE_RESULT = 1;
private PhoneAccountHandle mPhoneAccountHandle;
private PinChanger mPinChanger;
private static class ChangePinParams {
PinChanger pinChanger;
PhoneAccountHandle phoneAccountHandle;
String oldPin;
String newPin;
}
private DialerExecutor<ChangePinParams> mChangePinExecutor;
private int mPinMinLength;
private int mPinMaxLength;
private State mUiState = State.Initial;
private String mOldPin;
private String mFirstPin;
private ProgressDialog mProgressDialog;
private TextView mHeaderText;
private TextView mHintText;
private TextView mErrorText;
private EditText mPinEntry;
private Button mCancelButton;
private Button mNextButton;
private Handler mHandler = new ChangePinHandler(new WeakReference<>(this));
private enum State {
/**
* Empty state to handle initial state transition. Will immediately switch into {@link
* #VerifyOldPin} if a default PIN has been set by the OMTP client, or {@link #EnterOldPin} if
* not.
*/
Initial,
/**
* Prompt the user to enter old PIN. The PIN will be verified with the server before proceeding
* to {@link #EnterNewPin}.
*/
EnterOldPin {
@Override
public void onEnter(VoicemailChangePinActivity activity) {
activity.setHeader(R.string.change_pin_enter_old_pin_header);
activity.mHintText.setText(R.string.change_pin_enter_old_pin_hint);
activity.mNextButton.setText(R.string.change_pin_continue_label);
activity.mErrorText.setText(null);
}
@Override
public void onInputChanged(VoicemailChangePinActivity activity) {
activity.setNextEnabled(activity.getCurrentPasswordInput().length() > 0);
}
@Override
public void handleNext(VoicemailChangePinActivity activity) {
activity.mOldPin = activity.getCurrentPasswordInput();
activity.verifyOldPin();
}
@Override
public void handleResult(VoicemailChangePinActivity activity, @ChangePinResult int result) {
if (result == PinChanger.CHANGE_PIN_SUCCESS) {
activity.updateState(State.EnterNewPin);
} else {
CharSequence message = activity.getChangePinResultMessage(result);
activity.showError(message);
activity.mPinEntry.setText("");
}
}
},
/**
* The default old PIN is found. Show a blank screen while verifying with the server to make
* sure the PIN is still valid. If the PIN is still valid, proceed to {@link #EnterNewPin}. If
* not, the user probably changed the PIN through other means, proceed to {@link #EnterOldPin}.
* If any other issue caused the verifying to fail, show an error and exit.
*/
VerifyOldPin {
@Override
public void onEnter(VoicemailChangePinActivity activity) {
activity.findViewById(android.R.id.content).setVisibility(View.INVISIBLE);
activity.verifyOldPin();
}
@Override
public void handleResult(
final VoicemailChangePinActivity activity, @ChangePinResult int result) {
if (result == PinChanger.CHANGE_PIN_SUCCESS) {
activity.updateState(State.EnterNewPin);
} else if (result == PinChanger.CHANGE_PIN_SYSTEM_ERROR) {
activity
.getWindow()
.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN);
activity.showError(
activity.getString(R.string.change_pin_system_error),
new OnDismissListener() {
@Override
public void onDismiss(DialogInterface dialog) {
activity.finish();
}
});
} else {
LogUtil.e(TAG, "invalid default old PIN: " + activity.getChangePinResultMessage(result));
// If the default old PIN is rejected by the server, the PIN is probably changed
// through other means, or the generated pin is invalid
// Wipe the default old PIN so the old PIN input box will be shown to the user
// on the next time.
activity.mPinChanger.setScrambledPin(null);
activity.updateState(State.EnterOldPin);
}
}
@Override
public void onLeave(VoicemailChangePinActivity activity) {
activity.findViewById(android.R.id.content).setVisibility(View.VISIBLE);
}
},
/**
* Let the user enter the new PIN and validate the format. Only length is enforced, PIN strength
* check relies on the server. After a valid PIN is entered, proceed to {@link #ConfirmNewPin}
*/
EnterNewPin {
@Override
public void onEnter(VoicemailChangePinActivity activity) {
activity.mHeaderText.setText(R.string.change_pin_enter_new_pin_header);
activity.mNextButton.setText(R.string.change_pin_continue_label);
activity.mHintText.setText(
activity.getString(
R.string.change_pin_enter_new_pin_hint,
activity.mPinMinLength,
activity.mPinMaxLength));
}
@Override
public void onInputChanged(VoicemailChangePinActivity activity) {
String password = activity.getCurrentPasswordInput();
if (password.length() == 0) {
activity.setNextEnabled(false);
return;
}
CharSequence error = activity.validatePassword(password);
if (error != null) {
activity.mErrorText.setText(error);
activity.setNextEnabled(false);
} else {
activity.mErrorText.setText(null);
activity.setNextEnabled(true);
}
}
@Override
public void handleNext(VoicemailChangePinActivity activity) {
CharSequence errorMsg;
errorMsg = activity.validatePassword(activity.getCurrentPasswordInput());
if (errorMsg != null) {
activity.showError(errorMsg);
return;
}
activity.mFirstPin = activity.getCurrentPasswordInput();
activity.updateState(State.ConfirmNewPin);
}
},
/**
* Let the user type in the same PIN again to avoid typos. If the PIN matches then perform a PIN
* change to the server. Finish the activity if succeeded. Return to {@link #EnterOldPin} if the
* old PIN is rejected, {@link #EnterNewPin} for other failure.
*/
ConfirmNewPin {
@Override
public void onEnter(VoicemailChangePinActivity activity) {
activity.mHeaderText.setText(R.string.change_pin_confirm_pin_header);
activity.mHintText.setText(null);
activity.mNextButton.setText(R.string.change_pin_ok_label);
}
@Override
public void onInputChanged(VoicemailChangePinActivity activity) {
if (activity.getCurrentPasswordInput().length() == 0) {
activity.setNextEnabled(false);
return;
}
if (activity.getCurrentPasswordInput().equals(activity.mFirstPin)) {
activity.setNextEnabled(true);
activity.mErrorText.setText(null);
} else {
activity.setNextEnabled(false);
activity.mErrorText.setText(R.string.change_pin_confirm_pins_dont_match);
}
}
@Override
public void handleResult(VoicemailChangePinActivity activity, @ChangePinResult int result) {
if (result == PinChanger.CHANGE_PIN_SUCCESS) {
// If the PIN change succeeded we no longer know what the old (current) PIN is.
// Wipe the default old PIN so the old PIN input box will be shown to the user
// on the next time.
activity.mPinChanger.setScrambledPin(null);
activity.finish();
Logger.get(activity).logImpression(DialerImpression.Type.VVM_CHANGE_PIN_COMPLETED);
Toast.makeText(
activity, activity.getString(R.string.change_pin_succeeded), Toast.LENGTH_SHORT)
.show();
} else {
CharSequence message = activity.getChangePinResultMessage(result);
LogUtil.i(TAG, "Change PIN failed: " + message);
activity.showError(message);
if (result == PinChanger.CHANGE_PIN_MISMATCH) {
// Somehow the PIN has changed, prompt to enter the old PIN again.
activity.updateState(State.EnterOldPin);
} else {
// The new PIN failed to fulfil other restrictions imposed by the server.
activity.updateState(State.EnterNewPin);
}
}
}
@Override
public void handleNext(VoicemailChangePinActivity activity) {
activity.processPinChange(activity.mOldPin, activity.mFirstPin);
}
};
/** The activity has switched from another state to this one. */
public void onEnter(VoicemailChangePinActivity activity) {
// Do nothing
}
/**
* The user has typed something into the PIN input field. Also called after {@link
* #onEnter(VoicemailChangePinActivity)}
*/
public void onInputChanged(VoicemailChangePinActivity activity) {
// Do nothing
}
/** The asynchronous call to change the PIN on the server has returned. */
public void handleResult(VoicemailChangePinActivity activity, @ChangePinResult int result) {
// Do nothing
}
/** The user has pressed the "next" button. */
public void handleNext(VoicemailChangePinActivity activity) {
// Do nothing
}
/** The activity has switched from this state to another one. */
public void onLeave(VoicemailChangePinActivity activity) {
// Do nothing
}
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mPhoneAccountHandle =
getIntent().getParcelableExtra(VoicemailClient.PARAM_PHONE_ACCOUNT_HANDLE);
mPinChanger =
VoicemailComponent.get(this)
.getVoicemailClient()
.createPinChanger(getApplicationContext(), mPhoneAccountHandle);
setContentView(R.layout.voicemail_change_pin);
setTitle(R.string.change_pin_title);
readPinLength();
View view = findViewById(android.R.id.content);
mCancelButton = (Button) view.findViewById(R.id.cancel_button);
mCancelButton.setOnClickListener(this);
mNextButton = (Button) view.findViewById(R.id.next_button);
mNextButton.setOnClickListener(this);
mPinEntry = (EditText) view.findViewById(R.id.pin_entry);
mPinEntry.setOnEditorActionListener(this);
mPinEntry.addTextChangedListener(this);
if (mPinMaxLength != 0) {
mPinEntry.setFilters(new InputFilter[] {new LengthFilter(mPinMaxLength)});
}
mHeaderText = (TextView) view.findViewById(R.id.headerText);
mHintText = (TextView) view.findViewById(R.id.hintText);
mErrorText = (TextView) view.findViewById(R.id.errorText);
if (isPinScrambled(this, mPhoneAccountHandle)) {
mOldPin = mPinChanger.getScrambledPin();
updateState(State.VerifyOldPin);
} else {
updateState(State.EnterOldPin);
}
mChangePinExecutor =
DialerExecutorComponent.get(this)
.dialerExecutorFactory()
.createUiTaskBuilder(getFragmentManager(), "changePin", new ChangePinWorker())
.onSuccess(this::sendResult)
.onFailure((tr) -> sendResult(PinChanger.CHANGE_PIN_SYSTEM_ERROR))
.build();
}
/** Extracts the pin length requirement sent by the server with a STATUS SMS. */
private void readPinLength() {
PinSpecification pinSpecification = mPinChanger.getPinSpecification();
mPinMinLength = pinSpecification.minLength;
mPinMaxLength = pinSpecification.maxLength;
}
@Override
public void onResume() {
super.onResume();
updateState(mUiState);
}
public void handleNext() {
if (mPinEntry.length() == 0) {
return;
}
mUiState.handleNext(this);
}
@Override
public void onClick(View v) {
if (v.getId() == R.id.next_button) {
handleNext();
} else if (v.getId() == R.id.cancel_button) {
finish();
}
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (item.getItemId() == android.R.id.home) {
onBackPressed();
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
if (!mNextButton.isEnabled()) {
return true;
}
// Check if this was the result of hitting the enter or "done" key
if (actionId == EditorInfo.IME_NULL
|| actionId == EditorInfo.IME_ACTION_DONE
|| actionId == EditorInfo.IME_ACTION_NEXT) {
handleNext();
return true;
}
return false;
}
@Override
public void afterTextChanged(Editable s) {
mUiState.onInputChanged(this);
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
// Do nothing
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
// Do nothing
}
/**
* After replacing the default PIN with a random PIN, call this to store the random PIN. The
* stored PIN will be automatically entered when the user attempts to change the PIN.
*/
public static boolean isPinScrambled(Context context, PhoneAccountHandle phoneAccountHandle) {
return VoicemailComponent.get(context)
.getVoicemailClient()
.createPinChanger(context, phoneAccountHandle)
.getScrambledPin()
!= null;
}
private String getCurrentPasswordInput() {
return mPinEntry.getText().toString();
}
private void updateState(State state) {
State previousState = mUiState;
mUiState = state;
if (previousState != state) {
previousState.onLeave(this);
mPinEntry.setText("");
mUiState.onEnter(this);
}
mUiState.onInputChanged(this);
}
/**
* Validates PIN and returns a message to display if PIN fails test.
*
* @param password the raw password the user typed in
* @return error message to show to user or null if password is OK
*/
private CharSequence validatePassword(String password) {
if (mPinMinLength == 0 && mPinMaxLength == 0) {
// Invalid length requirement is sent by the server, just accept anything and let the
// server decide.
return null;
}
if (password.length() < mPinMinLength) {
return getString(R.string.vm_change_pin_error_too_short);
}
return null;
}
private void setHeader(int text) {
mHeaderText.setText(text);
mPinEntry.setContentDescription(mHeaderText.getText());
}
/**
* Get the corresponding message for the {@link ChangePinResult}.<code>result</code> must not
* {@link PinChanger#CHANGE_PIN_SUCCESS}
*/
private CharSequence getChangePinResultMessage(@ChangePinResult int result) {
switch (result) {
case PinChanger.CHANGE_PIN_TOO_SHORT:
return getString(R.string.vm_change_pin_error_too_short);
case PinChanger.CHANGE_PIN_TOO_LONG:
return getString(R.string.vm_change_pin_error_too_long);
case PinChanger.CHANGE_PIN_TOO_WEAK:
return getString(R.string.vm_change_pin_error_too_weak);
case PinChanger.CHANGE_PIN_INVALID_CHARACTER:
return getString(R.string.vm_change_pin_error_invalid);
case PinChanger.CHANGE_PIN_MISMATCH:
return getString(R.string.vm_change_pin_error_mismatch);
case PinChanger.CHANGE_PIN_SYSTEM_ERROR:
return getString(R.string.vm_change_pin_error_system_error);
default:
LogUtil.e(TAG, "Unexpected ChangePinResult " + result);
return null;
}
}
private void verifyOldPin() {
processPinChange(mOldPin, mOldPin);
}
private void setNextEnabled(boolean enabled) {
mNextButton.setEnabled(enabled);
}
private void showError(CharSequence message) {
showError(message, null);
}
private void showError(CharSequence message, @Nullable OnDismissListener callback) {
new AlertDialog.Builder(this)
.setMessage(message)
.setPositiveButton(android.R.string.ok, null)
.setOnDismissListener(callback)
.show();
}
/** Asynchronous call to change the PIN on the server. */
private void processPinChange(String oldPin, String newPin) {
mProgressDialog = new ProgressDialog(this);
mProgressDialog.setCancelable(false);
mProgressDialog.setMessage(getString(R.string.vm_change_pin_progress_message));
mProgressDialog.show();
ChangePinParams params = new ChangePinParams();
params.pinChanger = mPinChanger;
params.phoneAccountHandle = mPhoneAccountHandle;
params.oldPin = oldPin;
params.newPin = newPin;
mChangePinExecutor.executeSerial(params);
}
private void sendResult(@ChangePinResult int result) {
LogUtil.i(TAG, "Change PIN result: " + result);
if (mProgressDialog.isShowing()
&& !VoicemailChangePinActivity.this.isDestroyed()
&& !VoicemailChangePinActivity.this.isFinishing()) {
mProgressDialog.dismiss();
} else {
LogUtil.i(TAG, "Dialog not visible, not dismissing");
}
mHandler.obtainMessage(MESSAGE_HANDLE_RESULT, result, 0).sendToTarget();
}
private static class ChangePinHandler extends Handler {
private final WeakReference<VoicemailChangePinActivity> activityWeakReference;
private ChangePinHandler(WeakReference<VoicemailChangePinActivity> activityWeakReference) {
this.activityWeakReference = activityWeakReference;
}
@Override
public void handleMessage(Message message) {
VoicemailChangePinActivity activity = activityWeakReference.get();
if (activity == null) {
return;
}
if (message.what == MESSAGE_HANDLE_RESULT) {
activity.mUiState.handleResult(activity, message.arg1);
}
}
}
private static class ChangePinWorker implements Worker<ChangePinParams, Integer> {
@Nullable
@Override
public Integer doInBackground(@Nullable ChangePinParams input) throws Throwable {
return input.pinChanger.changePin(input.oldPin, input.newPin);
}
}
}
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