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      1 /*
      2  * Copyright (C) 2013 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.settings.nfc;
     18 
     19 import android.content.ComponentName;
     20 import android.content.DialogInterface;
     21 import android.content.Intent;
     22 import android.nfc.cardemulation.CardEmulation;
     23 import android.os.Bundle;
     24 import android.util.Log;
     25 
     26 import com.android.internal.app.AlertActivity;
     27 import com.android.internal.app.AlertController;
     28 import com.android.settings.R;
     29 import com.android.settings.nfc.PaymentBackend.PaymentAppInfo;
     30 
     31 import java.util.List;
     32 
     33 public final class PaymentDefaultDialog extends AlertActivity implements
     34         DialogInterface.OnClickListener {
     35 
     36     public static final String TAG = "PaymentDefaultDialog";
     37     private static final int PAYMENT_APP_MAX_CAPTION_LENGTH = 40;
     38 
     39     private PaymentBackend mBackend;
     40     private ComponentName mNewDefault;
     41 
     42     @Override
     43     protected void onCreate(Bundle savedInstanceState) {
     44         super.onCreate(savedInstanceState);
     45         mBackend = new PaymentBackend(this);
     46         Intent intent = getIntent();
     47         ComponentName component = intent.getParcelableExtra(
     48                 CardEmulation.EXTRA_SERVICE_COMPONENT);
     49         String category = intent.getStringExtra(CardEmulation.EXTRA_CATEGORY);
     50 
     51         setResult(RESULT_CANCELED);
     52         if (!buildDialog(component, category)) {
     53             finish();
     54         }
     55 
     56     }
     57 
     58     @Override
     59     public void onClick(DialogInterface dialog, int which) {
     60         switch (which) {
     61             case BUTTON_POSITIVE:
     62                 mBackend.setDefaultPaymentApp(mNewDefault);
     63                 setResult(RESULT_OK);
     64                 break;
     65             case BUTTON_NEGATIVE:
     66                 break;
     67         }
     68     }
     69 
     70     private boolean buildDialog(ComponentName component, String category) {
     71         if (component == null || category == null) {
     72             Log.e(TAG, "Component or category are null");
     73             return false;
     74         }
     75 
     76         if (!CardEmulation.CATEGORY_PAYMENT.equals(category)) {
     77             Log.e(TAG, "Don't support defaults for category " + category);
     78             return false;
     79         }
     80 
     81         // Check if passed in service exists
     82         PaymentAppInfo requestedPaymentApp = null;
     83         PaymentAppInfo defaultPaymentApp = null;
     84 
     85         List<PaymentAppInfo> services = mBackend.getPaymentAppInfos();
     86         for (PaymentAppInfo service : services) {
     87             if (component.equals(service.componentName)) {
     88                 requestedPaymentApp = service;
     89             }
     90             if (service.isDefault) {
     91                 defaultPaymentApp = service;
     92             }
     93         }
     94 
     95         if (requestedPaymentApp == null) {
     96             Log.e(TAG, "Component " + component + " is not a registered payment service.");
     97             return false;
     98         }
     99 
    100         // Get current mode and default component
    101         ComponentName defaultComponent = mBackend.getDefaultPaymentApp();
    102         if (defaultComponent != null && defaultComponent.equals(component)) {
    103             Log.e(TAG, "Component " + component + " is already default.");
    104             return false;
    105         }
    106 
    107         mNewDefault = component;
    108         // Compose dialog; get
    109         final AlertController.AlertParams p = mAlertParams;
    110         p.mTitle = getString(R.string.nfc_payment_set_default_label);
    111         if (defaultPaymentApp == null) {
    112             String formatString = getString(R.string.nfc_payment_set_default);
    113             String msg = String.format(formatString,
    114                     sanitizePaymentAppCaption(requestedPaymentApp.label.toString()));
    115             p.mMessage = msg;
    116         } else {
    117             String formatString = getString(R.string.nfc_payment_set_default_instead_of);
    118             String msg = String.format(formatString,
    119                     sanitizePaymentAppCaption(requestedPaymentApp.label.toString()),
    120                     sanitizePaymentAppCaption(defaultPaymentApp.label.toString()));
    121             p.mMessage = msg;
    122         }
    123         p.mPositiveButtonText = getString(R.string.yes);
    124         p.mNegativeButtonText = getString(R.string.no);
    125         p.mPositiveButtonListener = this;
    126         p.mNegativeButtonListener = this;
    127         setupAlert();
    128 
    129         return true;
    130     }
    131 
    132     private String sanitizePaymentAppCaption(String input) {
    133         String sanitizedString = input.replace('\n', ' ').replace('\r', ' ').trim();
    134 
    135 
    136         if (sanitizedString.length() > PAYMENT_APP_MAX_CAPTION_LENGTH) {
    137             return sanitizedString.substring(0, PAYMENT_APP_MAX_CAPTION_LENGTH);
    138         }
    139 
    140         return sanitizedString;
    141     }
    142 
    143 }
    144