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A web service test double for all occasions - standalone edition

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/*
 * Copyright (C) 2023 Thomas Akehurst
 *
 * 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.github.tomakehurst.wiremock.common;

import static com.github.tomakehurst.wiremock.common.NetworkAddressRange.ALL;
import static java.util.Collections.emptySet;

import java.util.HashSet;
import java.util.Set;

public interface NetworkAddressRules {
  NetworkAddressRules ALLOW_ALL = new DefaultNetworkAddressRules(Set.of(ALL), emptySet());

  static Builder builder() {
    return new Builder();
  }

  boolean isAllowed(String testValue);

  public static class Builder {
    private final Set allowed = new HashSet<>();
    private final Set denied = new HashSet<>();

    public Builder allow(String expression) {
      allowed.add(NetworkAddressRange.of(expression));
      return this;
    }

    public Builder deny(String expression) {
      denied.add(NetworkAddressRange.of(expression));
      return this;
    }

    public NetworkAddressRules build() {
      Set allowedRanges = allowed;
      if (allowedRanges.isEmpty()) {
        allowedRanges = Set.of(ALL);
      }
      return new DefaultNetworkAddressRules(Set.copyOf(allowedRanges), Set.copyOf(denied));
    }
  }
}