74 lines
2.6 KiB
Java
74 lines
2.6 KiB
Java
/*
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License
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*/
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package com.android.dialer.oem;
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import android.content.Context;
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import android.os.Build;
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import android.support.annotation.VisibleForTesting;
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import com.android.dialer.common.Assert;
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import com.android.dialer.compat.telephony.TelephonyManagerCompat;
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import com.google.common.collect.ImmutableSet;
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/** Utilities for Transsion devices. */
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public final class TranssionUtils {
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@VisibleForTesting
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public static final ImmutableSet<String> TRANSSION_DEVICE_MANUFACTURERS =
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ImmutableSet.of("INFINIX MOBILITY LIMITED", "itel", "TECNO");
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@VisibleForTesting
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public static final ImmutableSet<String> TRANSSION_SECRET_CODES =
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ImmutableSet.of("*#07#", "*#87#", "*#43#", "*#2727#", "*#88#");
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private TranssionUtils() {}
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/**
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* Returns true if
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*
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* <ul>
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* <li>the device is a Transsion device, AND
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* <li>the input is a secret code for Transsion devices.
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* </ul>
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*/
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public static boolean isTranssionSecretCode(String input) {
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return TRANSSION_DEVICE_MANUFACTURERS.contains(Build.MANUFACTURER)
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&& TRANSSION_SECRET_CODES.contains(input);
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}
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/**
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* Handle a Transsion secret code by passing it to {@link
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* TelephonyManagerCompat#handleSecretCode(Context, String)}.
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*
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* <p>Before calling this method, we must use {@link #isTranssionSecretCode(String)} to ensure the
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* device is a Transsion device and the input is a valid Transsion secret code.
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*
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* <p>An exception will be thrown if either of the conditions above is not met.
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*/
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public static void handleTranssionSecretCode(Context context, String input) {
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Assert.checkState(isTranssionSecretCode(input));
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TelephonyManagerCompat.handleSecretCode(context, getDigitsFromSecretCode(input));
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}
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private static String getDigitsFromSecretCode(String input) {
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// We assume a valid secret code is of format "*#{[0-9]+}#".
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Assert.checkArgument(input.length() > 3 && input.startsWith("*#") && input.endsWith("#"));
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return input.substring(2, input.length() - 1);
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}
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}
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