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      1 /*
      2  * Copyright (C) 2017 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 package com.example.android.autofill.service;
     17 
     18 import android.content.Context;
     19 import android.content.IntentSender;
     20 import android.service.autofill.Dataset;
     21 import android.service.autofill.FillResponse;
     22 import android.service.autofill.SaveInfo;
     23 import android.support.annotation.DrawableRes;
     24 import android.util.Log;
     25 import android.view.autofill.AutofillId;
     26 import android.widget.RemoteViews;
     27 
     28 import com.example.android.autofill.service.model.FilledAutofillFieldCollection;
     29 
     30 import java.util.HashMap;
     31 import java.util.Set;
     32 
     33 import static com.example.android.autofill.service.CommonUtil.TAG;
     34 
     35 /**
     36  * This is a class containing helper methods for building Autofill Datasets and Responses.
     37  */
     38 public final class AutofillHelper {
     39 
     40     private AutofillHelper() {
     41         throw new UnsupportedOperationException("provide static methods only");
     42     }
     43 
     44     /**
     45      * Wraps autofill data in a LoginCredential  Dataset object which can then be sent back to the
     46      * client View.
     47      */
     48     public static Dataset newDataset(Context context,
     49             AutofillFieldMetadataCollection autofillFields,
     50             FilledAutofillFieldCollection filledAutofillFieldCollection, boolean datasetAuth) {
     51         String datasetName = filledAutofillFieldCollection.getDatasetName();
     52         if (datasetName != null) {
     53             Dataset.Builder datasetBuilder;
     54             if (datasetAuth) {
     55                 datasetBuilder = new Dataset.Builder
     56                         (newRemoteViews(context.getPackageName(), datasetName,
     57                                 R.drawable.ic_lock_black_24dp));
     58                 IntentSender sender =
     59                         AuthActivity.getAuthIntentSenderForDataset(context, datasetName);
     60                 datasetBuilder.setAuthentication(sender);
     61             } else {
     62                 datasetBuilder = new Dataset.Builder
     63                         (newRemoteViews(context.getPackageName(), datasetName,
     64                                 R.drawable.ic_person_black_24dp));
     65             }
     66             boolean setValueAtLeastOnce =
     67                     filledAutofillFieldCollection.applyToFields(autofillFields, datasetBuilder);
     68             if (setValueAtLeastOnce) {
     69                 return datasetBuilder.build();
     70             }
     71         }
     72         return null;
     73     }
     74 
     75     public static RemoteViews newRemoteViews(String packageName, String remoteViewsText,
     76             @DrawableRes int drawableId) {
     77         RemoteViews presentation =
     78                 new RemoteViews(packageName, R.layout.multidataset_service_list_item);
     79         presentation.setTextViewText(R.id.text, remoteViewsText);
     80         presentation.setImageViewResource(R.id.icon, drawableId);
     81         return presentation;
     82     }
     83 
     84     /**
     85      * Wraps autofill data in a Response object (essentially a series of Datasets) which can then
     86      * be sent back to the client View.
     87      */
     88     public static FillResponse newResponse(Context context,
     89             boolean datasetAuth, AutofillFieldMetadataCollection autofillFields,
     90             HashMap<String, FilledAutofillFieldCollection> clientFormDataMap) {
     91         FillResponse.Builder responseBuilder = new FillResponse.Builder();
     92         if (clientFormDataMap != null) {
     93             Set<String> datasetNames = clientFormDataMap.keySet();
     94             for (String datasetName : datasetNames) {
     95                 FilledAutofillFieldCollection filledAutofillFieldCollection =
     96                         clientFormDataMap.get(datasetName);
     97                 if (filledAutofillFieldCollection != null) {
     98                     Dataset dataset = newDataset(context, autofillFields,
     99                             filledAutofillFieldCollection, datasetAuth);
    100                     if (dataset != null) {
    101                         responseBuilder.addDataset(dataset);
    102                     }
    103                 }
    104             }
    105         }
    106         if (autofillFields.getSaveType() != 0) {
    107             AutofillId[] autofillIds = autofillFields.getAutofillIds();
    108             responseBuilder.setSaveInfo
    109                     (new SaveInfo.Builder(autofillFields.getSaveType(), autofillIds).build());
    110             return responseBuilder.build();
    111         } else {
    112             Log.d(TAG, "These fields are not meant to be saved by autofill.");
    113             return null;
    114         }
    115     }
    116 }
    117