java/com/android/dialer/assisteddialing/CountryCodeProvider.java

/*
 * Copyright (C) 2017 The Android Open Source Project
 * Copyright (C) 2023 The LineageOS 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.assisteddialing;

import android.util.ArraySet;

import com.android.dialer.common.LogUtil;

import java.util.Arrays;
import java.util.List;
import java.util.Locale;
import java.util.Set;
import java.util.stream.Collectors;

/** A class to provide the appropriate country codes related to assisted dialing. */
public final class CountryCodeProvider {

  // TODO(erfanian): Ensure the below standard is consistent between libphonenumber and the
  // platform.
  // ISO 3166-1 alpha-2 Country Codes that are eligible for assisted dialing.
  private static final List<String> DEFAULT_COUNTRY_CODES =
      Arrays.asList(
          "CA" /* Canada */,
          "GB" /* United Kingdom */,
          "JP" /* Japan */,
          "MX" /* Mexico */,
          "US" /* United States */);

  private final Set<String> supportedCountryCodes;

  CountryCodeProvider() {
    supportedCountryCodes = DEFAULT_COUNTRY_CODES
            .stream()
            .map(v -> v.toUpperCase(Locale.US))
            .collect(Collectors.toCollection(ArraySet::new));
    LogUtil.i(
        "CountryCodeProvider.CountryCodeProvider", "Using country codes: " + supportedCountryCodes);
  }

  /** Checks whether a supplied country code is supported. */
  public boolean isSupportedCountryCode(String countryCode) {
    return supportedCountryCodes.contains(countryCode);
  }
}