import com.alibaba.fastjson.JSON;
import org.apache.commons.io.FileUtils;
import org.apache.commons.io.IOUtils;
import org.apache.commons.lang3.StringUtils;
import java.io.File;
import java.io.IOException;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.HashMap;
import java.util.Map;

/**
 * @author tjw
 */
public class MavenLocalRepoCleaner {

  /**
   * coordinateJson
   * {
   *   "groupId1":"artifactId1:version1,artifactId2:version2...",
   *   "groupId2":"artifactId:version,..."
   * }
   */
  public static void main(String[] args) {
    String coordinateJson="{"
      + "\"top.xbynet.xxx\":\"\""
      + "}";
    Map<String,String> coordinateMap=JSON.parseObject(coordinateJson,HashMap.class);
    Path m2Repo= Paths.get(System.getProperty("user.home"),".m2","repository");
    coordinateMap.entrySet().stream().forEach(v->{
      String groupId=v.getKey();
      groupId = groupId.replace('.', File.separatorChar);
      if(StringUtils.isBlank(v.getValue())){
        Path dir = Paths.get(m2Repo.toString(), groupId);
        try {
          FileUtils.deleteDirectory(dir.toFile());
        } catch (IOException e) {
          e.printStackTrace();
        }
      }else {
        String[] artfactIdVers = v.getValue().split(",");

        for (String str : artfactIdVers) {
          String ver = "";
          if (str.contains(":")) {
            ver = str.split(":")[1];
          }
          String artfactId = str.split(":")[0];
          Path dir = Paths.get(m2Repo.toString(), groupId, artfactId, ver);
          try {
            FileUtils.deleteDirectory(dir.toFile());
          } catch (IOException e) {
            e.printStackTrace();
          }
        }
      }
    });

  }
}