content: /*
   * Copyright 2021-2024 Aklivity Inc.
   *
   * Aklivity licenses this file to you 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 io.aklivity.zilla.runtime.binding.tls.internal.config;
  
  import java.util.Arrays;
  import java.util.regex.Matcher;
  import java.util.regex.Pattern;
  
  import org.agrona.collections.IntHashSet;
  
  import io.aklivity.zilla.runtime.binding.tls.config.TlsConditionConfig;
  
  public final class TlsConditionMatcher
  {
      public final Matcher authorityMatch;
      public final Matcher alpnMatch;
      public final IntHashSet ports;
  
      public TlsConditionMatcher(
          TlsConditionConfig condition)
      {
          this.authorityMatch = condition.authority != null ? asMatcher(condition.authority) : null;
          this.alpnMatch = condition.alpn != null ? asMatcher(condition.alpn) : null;
          this.ports = condition.ports != null ? asIntHashSet(condition.ports) : null;
      }
  
      public boolean matches(
          String authority,
          String alpn,
          int port)
      {
          return matchesAuthority(authority) &&
                  matchesAlpn(alpn) &&
                  matchesPort(port);
      }
  
      public boolean matchesPortOnly(
          int port)
      {
          return matchesPort(port);
      }
  
      private boolean matchesAuthority(
          String sni)
      {
          return authorityMatch == null || sni != null && authorityMatch.reset(sni).matches();
      }
  
      private boolean matchesAlpn(
          String alpn)
      {
          return alpnMatch == null || alpn != null && alpnMatch.reset(alpn).matches();
      }
  
      private boolean matchesPort(
          int port)
      {
          return ports == null || ports.contains(port);
      }
  
      private static Matcher asMatcher(
          String wildcard)
      {
          return Pattern.compile(wildcard.replace(".", "\\.").replace("*", ".*")).matcher("");
      }
  
      private static IntHashSet asIntHashSet(
          int[] ports)
      {
          IntHashSet set = new IntHashSet(ports.length);
          Arrays.stream(ports).forEach(set::add);
          return set;
      }
  }
  