| /* |
| * 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.android.tv.common.util; |
| |
| import android.content.Context; |
| import android.location.Address; |
| import android.support.annotation.NonNull; |
| import android.support.annotation.Nullable; |
| import android.text.TextUtils; |
| import android.util.Log; |
| import com.android.tv.common.CommonPreferences; |
| import java.io.IOException; |
| import java.util.HashMap; |
| import java.util.Locale; |
| import java.util.Map; |
| import java.util.regex.Pattern; |
| |
| /** A utility class to update, get, and set the last known postal or zip code. */ |
| public class PostalCodeUtils { |
| private static final String TAG = "PostalCodeUtils"; |
| |
| // Postcode formats, where A signifies a letter and 9 a digit: |
| // US zip code format: 99999 |
| private static final String POSTCODE_REGEX_US = "^(\\d{5})"; |
| // UK postcode district formats: A9, A99, AA9, AA99 |
| // Full UK postcode format: Postcode District + space + 9AA |
| // Should be able to handle both postcode district and full postcode |
| private static final String POSTCODE_REGEX_GB = |
| "^([A-Z][A-Z]?[0-9][0-9A-Z]?)( ?[0-9][A-Z]{2})?$"; |
| private static final String POSTCODE_REGEX_GB_GIR = "^GIR( ?0AA)?$"; // special UK postcode |
| |
| private static final Map<String, Pattern> REGION_PATTERN = new HashMap<>(); |
| private static final Map<String, Integer> REGION_MAX_LENGTH = new HashMap<>(); |
| |
| static { |
| REGION_PATTERN.put(Locale.US.getCountry(), Pattern.compile(POSTCODE_REGEX_US)); |
| REGION_PATTERN.put( |
| Locale.UK.getCountry(), |
| Pattern.compile(POSTCODE_REGEX_GB + "|" + POSTCODE_REGEX_GB_GIR)); |
| REGION_MAX_LENGTH.put(Locale.US.getCountry(), 5); |
| REGION_MAX_LENGTH.put(Locale.UK.getCountry(), 8); |
| } |
| |
| // The longest postcode number is 10-character-long. |
| // Use a larger number to accommodate future changes. |
| private static final int DEFAULT_MAX_LENGTH = 16; |
| |
| /** Returns {@code true} if postal code has been changed */ |
| public static boolean updatePostalCode(Context context) |
| throws IOException, SecurityException, NoPostalCodeException { |
| String postalCode = getPostalCode(context); |
| String lastPostalCode = getLastPostalCode(context); |
| if (TextUtils.isEmpty(postalCode)) { |
| if (TextUtils.isEmpty(lastPostalCode)) { |
| throw new NoPostalCodeException(); |
| } |
| } else if (!TextUtils.equals(postalCode, lastPostalCode)) { |
| setLastPostalCode(context, postalCode); |
| return true; |
| } |
| return false; |
| } |
| |
| /** |
| * Gets the last stored postal or zip code, which might be decided by {@link LocationUtils} or |
| * input by users. |
| */ |
| public static String getLastPostalCode(Context context) { |
| return CommonPreferences.getLastPostalCode(context); |
| } |
| |
| /** |
| * Sets the last stored postal or zip code. This method will overwrite the value written by |
| * calling {@link #updatePostalCode(Context)}. |
| */ |
| public static void setLastPostalCode(Context context, String postalCode) { |
| Log.i(TAG, "Set Postal Code:" + postalCode); |
| CommonPreferences.setLastPostalCode(context, postalCode); |
| } |
| |
| @Nullable |
| private static String getPostalCode(Context context) throws IOException, SecurityException { |
| Address address = LocationUtils.getCurrentAddress(context); |
| if (address != null) { |
| Log.i( |
| TAG, |
| "Current country and postal code is " |
| + address.getCountryName() |
| + ", " |
| + address.getPostalCode()); |
| return address.getPostalCode(); |
| } |
| return null; |
| } |
| |
| /** An {@link java.lang.Exception} class to notify no valid postal or zip code is available. */ |
| public static class NoPostalCodeException extends Exception { |
| public NoPostalCodeException() {} |
| } |
| |
| /** |
| * Checks whether a postcode matches the format of the specific region. |
| * |
| * @return {@code false} if the region is supported and the postcode doesn't match; {@code true} |
| * otherwise |
| */ |
| public static boolean matches(@NonNull CharSequence postcode, @NonNull String region) { |
| Pattern pattern = REGION_PATTERN.get(region.toUpperCase()); |
| return pattern == null || pattern.matcher(postcode).matches(); |
| } |
| |
| /** |
| * Gets the largest possible postcode length in the region. |
| * |
| * @return maximum postcode length if the region is supported; {@link #DEFAULT_MAX_LENGTH} |
| * otherwise |
| */ |
| public static int getRegionMaxLength(Context context) { |
| Integer maxLength = |
| REGION_MAX_LENGTH.get(LocationUtils.getCurrentCountry(context).toUpperCase()); |
| return maxLength == null ? DEFAULT_MAX_LENGTH : maxLength; |
| } |
| } |