content: /*
   * Copyright (C) 2018 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 android.service.autofill;
  
  import static android.view.autofill.Helper.sDebug;
  
  import android.annotation.NonNull;
  import android.annotation.Nullable;
  import android.annotation.TestApi;
  import android.icu.text.DateFormat;
  import android.os.Parcel;
  import android.os.Parcelable;
  import android.util.Log;
  import android.view.autofill.AutofillValue;
  
  import com.android.internal.util.Preconditions;
  
  import java.util.Date;
  
  /**
   * Sanitizes a date {@link AutofillValue} using a {@link DateFormat}.
   *
   * <p>For example, to sanitize a credit card expiration date to just its month and year:
   *
   * <pre class="prettyprint">
   * new DateValueSanitizer(new java.text.SimpleDateFormat("MM/yyyy");
   * </pre>
   */
  public final class DateValueSanitizer extends InternalSanitizer implements Sanitizer, Parcelable {
  
      private static final String TAG = "DateValueSanitizer";
  
      private final DateFormat mDateFormat;
  
      /**
       * Default constructor.
       *
       * @param dateFormat date format applied to the actual date value of an input field.
        */
      public DateValueSanitizer(@NonNull DateFormat dateFormat) {
          mDateFormat = Preconditions.checkNotNull(dateFormat);
      }
  
      /** @hide */
      @Override
      @TestApi
      @Nullable
      public AutofillValue sanitize(@NonNull AutofillValue value) {
          if (value == null) {
              Log.w(TAG, "sanitize() called with null value");
              return null;
          }
          if (!value.isDate()) {
              if (sDebug) Log.d(TAG, value + " is not a date");
              return null;
          }
  
          try {
              final Date date = new Date(value.getDateValue());
  
              // First convert it to string
              final String converted = mDateFormat.format(date);
              if (sDebug) Log.d(TAG, "Transformed " + date + " to " + converted);
              // Then parse it back to date
              final Date sanitized = mDateFormat.parse(converted);
              if (sDebug) Log.d(TAG, "Sanitized to " + sanitized);
              return AutofillValue.forDate(sanitized.getTime());
          } catch (Exception e) {
              Log.w(TAG, "Could not apply " + mDateFormat + " to " + value + ": " + e);
              return null;
          }
      }
  
      /////////////////////////////////////
      // Object "contract" methods. //
      /////////////////////////////////////
      @Override
      public String toString() {
          if (!sDebug) return super.toString();
  
          return "DateValueSanitizer: [dateFormat=" + mDateFormat + "]";
      }
  
      /////////////////////////////////////
      // Parcelable "contract" methods. //
      /////////////////////////////////////
      @Override
      public int describeContents() {
          return 0;
      }
  
      @Override
      public void writeToParcel(Parcel parcel, int flags) {
          parcel.writeSerializable(mDateFormat);
      }
  
      public static final @android.annotation.NonNull Parcelable.Creator<DateValueSanitizer> CREATOR =
              new Parcelable.Creator<DateValueSanitizer>() {
          @Override
          public DateValueSanitizer createFromParcel(Parcel parcel) {
              return new DateValueSanitizer((DateFormat) parcel.readSerializable());
          }
  
          @Override
          public DateValueSanitizer[] newArray(int size) {
              return new DateValueSanitizer[size];
          }
      };
  }
  