io.github.oliviercailloux.javagrade.utils.UsernamesToCsv Maven / Gradle / Ivy

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package io.github.oliviercailloux.javagrade.utils;

import com.google.common.collect.ImmutableMap;
import com.univocity.parsers.csv.CsvWriter;
import com.univocity.parsers.csv.CsvWriterSettings;
import io.github.oliviercailloux.git.github.model.GitHubUsername;
import io.github.oliviercailloux.grade.comm.StudentOnGitHubKnown;
import io.github.oliviercailloux.grade.comm.json.JsonStudents;
import java.io.StringWriter;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;

public class UsernamesToCsv {
  private static final Path WORK_DIR = Paths.get("../../Java L3/");

  public static void main(String[] args) throws Exception {
    final JsonStudents students =
        JsonStudents.from(Files.readString(WORK_DIR.resolve("usernames.json")));
    final ImmutableMap usernames =
        students.getStudentsKnownByGitHubUsername();

    final StringWriter stringWriter = new StringWriter();
    final CsvWriter writer = new CsvWriter(stringWriter, new CsvWriterSettings());
    writer.writeHeaders("GitHub username", "GitHub URL");
    for (GitHubUsername username : usernames.keySet()) {
      writer.writeRow(username.getUsername(), username.getUrl());
    }
    writer.close();

    Files.writeString(Path.of("out.csv"), stringWriter.toString());
  }
}