text: /*
   * This file is a part of SonarQube 1C (BSL) Community Plugin.
   *
   * Copyright © 2018-2020
   * Alexey Sosnoviy <labotamy@gmail.com>, Nikita Gryzlov <nixel2007@gmail.com>
   *
   * SPDX-License-Identifier: LGPL-3.0-or-later
   *
   * SonarQube 1C (BSL) Community Plugin is free software; you can redistribute it and/or
   * modify it under the terms of the GNU Lesser General Public
   * License as published by the Free Software Foundation; either
   * version 3.0 of the License, or (at your option) any later version.
   *
   * SonarQube 1C (BSL) Community Plugin is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   * Lesser General Public License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with SonarQube 1C (BSL) Community Plugin.
   */
  package com.github._1c_syntax.bsl.sonar.acc;
  
  import com.fasterxml.jackson.databind.MapperFeature;
  import com.fasterxml.jackson.databind.ObjectMapper;
  import org.apache.commons.io.FileUtils;
  import org.apache.commons.io.IOUtils;
  import org.sonar.api.utils.log.Logger;
  import org.sonar.api.utils.log.Loggers;
  
  import java.io.File;
  import java.io.IOException;
  import java.nio.charset.StandardCharsets;
  import java.util.Objects;
  import java.util.Optional;
  
  public class ACCRulesFileReader {
  
    private static final Logger LOGGER = Loggers.get(ACCRulesFileReader.class);
  
    private final String[] filePaths;
    private int current;
  
    public ACCRulesFileReader(String[] filePaths) {
      this.filePaths = filePaths.clone();
    }
  
    public Optional<ACCRulesFile> getNext() {
      if (hasMore()) {
        Optional<ACCRulesFile> rules = getRulesFromFile();
        current++;
        return rules;
      }
  
      return Optional.empty();
    }
  
    public boolean hasMore() {
      return current < filePaths.length;
    }
  
    public static Optional<ACCRulesFile> getRulesFromResource() {
      String json;
  
      try {
        json = IOUtils.toString(
            Objects.requireNonNull(ACCRuleDefinition.class.getClassLoader().getResourceAsStream("acc.json")),
            StandardCharsets.UTF_8.name()
        );
      } catch (IOException e) {
        LOGGER.error("Can't read json file acc rules", e);
        return Optional.empty();
      }
  
      return getAccRulesFile(json);
    }
  
    private static Optional<ACCRulesFile> getAccRulesFile(String json) {
      ObjectMapper objectMapper = new ObjectMapper();
      objectMapper.configure(MapperFeature.ACCEPT_CASE_INSENSITIVE_PROPERTIES, true);
      try {
        return Optional.of(objectMapper.readValue(json, ACCRulesFile.class));
      } catch (IOException e) {
        LOGGER.error("Can't serialize json acc rules to object", e);
        return Optional.empty();
      }
    }
  
    private Optional<ACCRulesFile> getRulesFromFile() {
      File file = new File(filePaths[current]);
      String json;
  
      try {
        json = FileUtils.readFileToString(file, StandardCharsets.UTF_8);
      } catch (IOException e) {
        LOGGER.error("Can't read json file acc rules", file.toURI().toString(), e);
        return Optional.empty();
      }
  
      return getAccRulesFile(json);
    }
  
  }
  