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/*
 * This file is part of git-commit-id-plugin-core by Konrad 'ktoso' Malawski 
 *
 * git-commit-id-plugin-core 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 of the License, or
 * (at your option) any later version.
 *
 * git-commit-id-plugin-core 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 General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with git-commit-id-plugin-core.  If not, see .
 */

package pl.project13.core.cibuild;

import pl.project13.core.log.LogInterface;
import pl.project13.core.GitCommitPropertyConstant;

import javax.annotation.Nonnull;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.Map;
import java.util.Properties;

public class TeamCityBuildServerData extends BuildServerDataProvider {

  private final Properties teamcitySystemProperties = new Properties();

  TeamCityBuildServerData(@Nonnull LogInterface log, @Nonnull Map env) {
    super(log, env);
    if (isActiveServer(env)) {
      //https://confluence.jetbrains.com/display/TCD18/Predefined+Build+Parameters
      try {
        teamcitySystemProperties.load(new FileInputStream(env.get("TEAMCITY_BUILD_PROPERTIES_FILE")));
      } catch (IOException | NullPointerException e) {
        log.error("Failed to retrieve Teamcity properties file", e);
      }
    }
  }

  /**
   * @param env The current system environment variables, obtained via System.getenv().
   * @return true, if the system environment variables contain the TeamCity specific environment variable; false otherwise
   * @see TeamCity
   */
  public static boolean isActiveServer(@Nonnull Map env) {
    return env.containsKey("TEAMCITY_VERSION");
  }

  @Override
  void loadBuildNumber(@Nonnull Properties properties) {
    String buildNumber = env.getOrDefault("BUILD_NUMBER", "");
    String buildNumberUnique = teamcitySystemProperties.getProperty("teamcity.build.id", "");

    maybePut(properties, GitCommitPropertyConstant.BUILD_NUMBER, () -> buildNumber);
    maybePut(properties, GitCommitPropertyConstant.BUILD_NUMBER_UNIQUE, () -> buildNumberUnique);
  }

  @Override
  public String getBuildBranch() {
    //there is no branch environment variable in TeamCity 10 or earlier
    String environmentBasedBranch = teamcitySystemProperties.getProperty("teamcity.build.branch");
    log.info(String.format("Using property file based branch name. teamcity.build.branch = %s",
        environmentBasedBranch));
    return environmentBasedBranch;
  }
}