component-test/src/main/java/org/apache/fineract/cn/anubis/example/nokeystorage/SpecialTenantSignatureRepository.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF 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 org.apache.fineract.cn.anubis.example.nokeystorage;

import org.apache.fineract.cn.anubis.api.v1.domain.ApplicationSignatureSet;
import org.apache.fineract.cn.anubis.api.v1.domain.Signature;
import org.apache.fineract.cn.anubis.config.TenantSignatureRepository;
import org.apache.fineract.cn.lang.security.RsaKeyPairFactory;
import org.springframework.stereotype.Component;

import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.stream.Collectors;

/**
 * @author Myrle Krantz
 */
@Component
public class SpecialTenantSignatureRepository implements TenantSignatureRepository {
  private static class AllTheKeyInfos {
    final ApplicationSignatureSet applicationSignatureSet;
    final RsaKeyPairFactory.KeyPairHolder applicationKeyPair;

    private AllTheKeyInfos(
            final ApplicationSignatureSet applicationSignatureSet,
            final RsaKeyPairFactory.KeyPairHolder applicationKeyPair) {
      this.applicationSignatureSet = applicationSignatureSet;
      this.applicationKeyPair = applicationKeyPair;
    }

    ApplicationSignatureSet getApplicationSignatureSet() {
      return applicationSignatureSet;
    }

    RsaKeyPairFactory.KeyPairHolder getApplicationKeyPair() {
      return applicationKeyPair;
    }
  }
  private final Map<String, AllTheKeyInfos> applicationSignatureSetMap = new HashMap<>();

  void addSignatureSet(final ApplicationSignatureSet applicationSignatureSet,
                       final RsaKeyPairFactory.KeyPairHolder applicationKeyPair) {
    applicationSignatureSetMap.put(applicationSignatureSet.getTimestamp(),
            new AllTheKeyInfos(applicationSignatureSet, applicationKeyPair));
  }

  @Override
  public Optional<Signature> getIdentityManagerSignature(final String timestamp) throws IllegalArgumentException {
    final Optional<ApplicationSignatureSet> sigset =
            Optional.ofNullable(applicationSignatureSetMap.get(timestamp))
                    .map(AllTheKeyInfos::getApplicationSignatureSet);
    return sigset.map(ApplicationSignatureSet::getIdentityManagerSignature);
  }

  @Override
  public List<String> getAllSignatureSetKeyTimestamps() {
    return applicationSignatureSetMap.keySet().stream().collect(Collectors.toList());
  }

  @Override
  public Optional<ApplicationSignatureSet> getSignatureSet(final String timestamp) {
    return Optional.ofNullable(applicationSignatureSetMap.get(timestamp))
            .map(AllTheKeyInfos::getApplicationSignatureSet);
  }

  @Override
  public void deleteSignatureSet(final String timestamp) {
    applicationSignatureSetMap.remove(timestamp);
  }

  @Override
  public Optional<Signature> getApplicationSignature(final String timestamp) {
    final Optional<ApplicationSignatureSet> sigset
            = Optional.ofNullable(applicationSignatureSetMap.get(timestamp))
            .map(AllTheKeyInfos::getApplicationSignatureSet);
    return sigset.map(ApplicationSignatureSet::getApplicationSignature);
  }

  @Override
  public Optional<ApplicationSignatureSet> getLatestSignatureSet() {
    final Optional<String> timestamp = getMostRecentTimestamp();
    return timestamp.flatMap(this::getSignatureSet);
  }

  @Override
  public Optional<Signature> getLatestApplicationSignature() {
    final Optional<String> timestamp = getMostRecentTimestamp();
    return timestamp.flatMap(this::getApplicationSignature);
  }

  @Override
  public Optional<RsaKeyPairFactory.KeyPairHolder> getLatestApplicationSigningKeyPair() {
    final Optional<String> timestamp = getMostRecentTimestamp();
    return timestamp
            .flatMap(x -> Optional.ofNullable(applicationSignatureSetMap.get(x)))
            .map(AllTheKeyInfos::getApplicationKeyPair);
  }

  private Optional<String> getMostRecentTimestamp() {
    return getAllSignatureSetKeyTimestamps().stream()
            .max(String::compareTo);
  }
}