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/*
* 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 com.android.dialer.oem;
import android.content.Context;
import android.os.Build;
import android.support.annotation.VisibleForTesting;
import com.android.dialer.common.Assert;
import com.android.dialer.compat.telephony.TelephonyManagerCompat;
import com.google.common.collect.ImmutableSet;
/** Utilities for Transsion devices. */
public final class TranssionUtils {
@VisibleForTesting
public static final ImmutableSet<String> TRANSSION_DEVICE_MANUFACTURERS =
ImmutableSet.of("INFINIX MOBILITY LIMITED", "itel", "TECNO");
@VisibleForTesting
public static final ImmutableSet<String> TRANSSION_SECRET_CODES =
ImmutableSet.of("*#07#", "*#87#", "*#43#", "*#2727#", "*#88#");
private TranssionUtils() {}
/**
* Returns true if
*
* <ul>
* <li>the device is a Transsion device, AND
* <li>the input is a secret code for Transsion devices.
* </ul>
*/
public static boolean isTranssionSecretCode(String input) {
return TRANSSION_DEVICE_MANUFACTURERS.contains(Build.MANUFACTURER)
&& TRANSSION_SECRET_CODES.contains(input);
}
/**
* Handle a Transsion secret code by passing it to {@link
* TelephonyManagerCompat#handleSecretCode(Context, String)}.
*
* <p>Before calling this method, we must use {@link #isTranssionSecretCode(String)} to ensure the
* device is a Transsion device and the input is a valid Transsion secret code.
*
* <p>An exception will be thrown if either of the conditions above is not met.
*/
public static void handleTranssionSecretCode(Context context, String input) {
Assert.checkState(isTranssionSecretCode(input));
TelephonyManagerCompat.handleSecretCode(context, getDigitsFromSecretCode(input));
}
private static String getDigitsFromSecretCode(String input) {
// We assume a valid secret code is of format "*#{[0-9]+}#".
Assert.checkArgument(input.length() > 3 && input.startsWith("*#") && input.endsWith("#"));
return input.substring(2, input.length() - 1);
}
}
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