46 lines
1.6 KiB
Java
46 lines
1.6 KiB
Java
/**
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* Copyright (C) 2011 Whisper Systems
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package org.thoughtcrime.securesms.service;
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import android.content.Context;
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import org.thoughtcrime.securesms.util.TextSecurePreferences;
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import org.whispersystems.libsignal.util.guava.Optional;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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public class VerificationCodeParser {
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private static final Pattern CHALLENGE_PATTERN = Pattern.compile("(.*\\D|^)([0-9]{3,4})-([0-9]{3,4}).*", Pattern.DOTALL);
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public static Optional<String> parse(Context context, String messageBody) {
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if (messageBody == null) {
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return Optional.absent();
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}
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Matcher challengeMatcher = CHALLENGE_PATTERN.matcher(messageBody);
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if (!challengeMatcher.matches() || !TextSecurePreferences.isVerifying(context)) {
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return Optional.absent();
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}
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return Optional.of(challengeMatcher.group(challengeMatcher.groupCount() - 1) +
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challengeMatcher.group(challengeMatcher.groupCount()));
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}
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}
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