content: /*
   * Copyright (C) 2017 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.example.android.autofill.app.view.autofillable;
  
  import android.app.DatePickerDialog;
  import android.app.Dialog;
  import android.content.Context;
  import android.os.Bundle;
  import android.support.annotation.NonNull;
  import android.support.annotation.Nullable;
  import android.support.v4.app.DialogFragment;
  import android.support.v4.app.FragmentManager;
  import android.support.v7.widget.AppCompatEditText;
  import android.text.format.DateFormat;
  import android.util.AttributeSet;
  import android.util.Log;
  import android.view.View;
  import android.view.autofill.AutofillValue;
  import android.widget.DatePicker;
  
  import com.example.android.autofill.app.R;
  
  import java.util.Calendar;
  import java.util.Date;
  
  import static com.example.android.autofill.app.Util.DEBUG;
  import static com.example.android.autofill.app.Util.TAG;
  
  /**
   * A custom view that represents a {@link View#AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_DATE} using
   * a non-editable {@link EditText} that triggers a {@link DatePickerDialog} to represent the
   * credit card expiration month and year.
   */
  public class CreditCardExpirationDatePickerView extends AppCompatEditText {
  
      private static final int CC_EXP_YEARS_COUNT = 5;
  
      /**
       * Calendar instance used for month / year calculations. Should be reset before each use.
       */
      private final Calendar mTempCalendar;
  
      private int mMonth;
      private int mYear;
  
      public CreditCardExpirationDatePickerView(@NonNull Context context) {
          this(context, null);
      }
  
      public CreditCardExpirationDatePickerView(@NonNull Context context,
              @Nullable AttributeSet attrs) {
          this(context, attrs, 0);
      }
  
      public CreditCardExpirationDatePickerView(@NonNull Context context,
              @Nullable AttributeSet attrs, int defStyleAttr) {
          super(context, attrs, defStyleAttr);
          // Use the current date as the initial date in the picker.
          mTempCalendar = Calendar.getInstance();
          mYear = mTempCalendar.get(Calendar.YEAR);
          mMonth = mTempCalendar.get(Calendar.MONTH);
      }
  
      /**
       * Gets a temporary calendar set with the View's year and month.
       */
      private Calendar getCalendar() {
          mTempCalendar.clear();
          mTempCalendar.set(Calendar.YEAR, mYear);
          mTempCalendar.set(Calendar.MONTH, mMonth);
          mTempCalendar.set(Calendar.DATE, 1);
          return mTempCalendar;
      }
  
      @Override
      public AutofillValue getAutofillValue() {
          Calendar c = getCalendar();
          AutofillValue value = AutofillValue.forDate(c.getTimeInMillis());
          if (DEBUG) Log.d(TAG, "getAutofillValue(): " + value);
          return value;
      }
  
      @Override
      public void autofill(AutofillValue value) {
          if (value == null || !value.isDate()) {
              Log.w(TAG, "autofill(): invalid value " + value);
              return;
          }
          long time = value.getDateValue();
          mTempCalendar.setTimeInMillis(time);
          int year = mTempCalendar.get(Calendar.YEAR);
          int month = mTempCalendar.get(Calendar.MONTH);
          if (DEBUG) Log.d(TAG, "autofill(" + value + "): " + month + "/" + year);
          setDate(year, month);
      }
  
      private void setDate(int year, int month) {
          mYear = year;
          mMonth = month;
          Date selectedDate = new Date(getCalendar().getTimeInMillis());
          String dateString = DateFormat.getDateFormat(getContext()).format(selectedDate);
          setText(dateString);
      }
  
      @Override
      public int getAutofillType() {
          return AUTOFILL_TYPE_DATE;
      }
  
      public void reset() {
          mTempCalendar.setTimeInMillis(System.currentTimeMillis());
          setDate(mTempCalendar.get(Calendar.YEAR), mTempCalendar.get(Calendar.MONTH));
      }
  
      public void showDatePickerDialog(FragmentManager fragmentManager) {
          DatePickerFragment newFragment = new DatePickerFragment();
          newFragment.mParent = this;
          newFragment.show(fragmentManager, "datePicker");
      }
  
      public static class DatePickerFragment extends DialogFragment
              implements DatePickerDialog.OnDateSetListener {
  
          private CreditCardExpirationDatePickerView mParent;
  
          @Override
          public Dialog onCreateDialog(Bundle savedInstanceState) {
              DatePickerDialog dialog = new DatePickerDialog(getActivity(),
                      R.style.CustomDatePickerDialogTheme, this, mParent.mYear, mParent.mMonth, 1);
  
              DatePicker datePicker = dialog.getDatePicker();
  
              // Limit range.
              Calendar c = mParent.getCalendar();
              datePicker.setMinDate(c.getTimeInMillis());
              c.set(Calendar.YEAR, mParent.mYear + CC_EXP_YEARS_COUNT - 1);
              datePicker.setMaxDate(c.getTimeInMillis());
  
              // Remove day.
              datePicker.findViewById(getResources().getIdentifier("day", "id", "android"))
                      .setVisibility(View.GONE);
              return dialog;
          }
  
          @Override
          public void onDateSet(DatePicker view, int year, int month, int day) {
              mParent.setDate(year, month);
          }
      }
  }