Download Team Arena and Swiss PGNs

tournaments.jsh

if (! Files.exists(Path.of("chariot.jar"))) {
    Files.write(Path.of("chariot.jar"), URI.create(
        "https://repo1.maven.org/maven2/io/github/tors42/chariot/0.0.83/chariot-0.0.83.jar"
        ).toURL().openStream().readAllBytes());
}
/env --class-path chariot.jar

import chariot.Client;
import chariot.model.*

import java.io.*;
import java.nio.file.*;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

String teamId = "coders"; // https://lichess.org/team/coders
int maxArenas = 1;
int maxSwisses = 1;
boolean evals = false;
boolean clocks = false;

var client = Client.basic();
// var client = Client.auth("lip_token"); // faster download, but needs a token

if (client.teams().byTeamId(teamId) instanceof Fail<?> fail) {
    System.out.println("Failed to find team " + teamId + "\n" + fail);
    System.exit(1);
}

Path arenas = Path.of(teamId, "arenas");
Path swisses = Path.of(teamId, "swiss");

Files.createDirectories(arenas);
Files.createDirectories(swisses);

var counter = new AtomicInteger();
client.teams().arenaByTeamId(teamId, maxArenas).stream().forEach(arena -> {
        try {
            Files.writeString(
                    arenas.resolve(counter.incrementAndGet() + "-" + arena.id() + ".pgn"),
                    client.tournaments().pgnGamesByArenaId(arena.id(), params -> params.
                        evals(evals).
                        clocks(clocks)).
                    stream().
                    map(Pgn::toString).
                    collect(Collectors.joining("\n\n")));
        } catch (IOException ioe) { throw new UncheckedIOException(ioe); }
        });
counter.set(0);
client.teams().swissByTeamId(teamId, maxSwisses).stream().forEach(swiss -> {
        try {
            Files.writeString(
                    swisses.resolve(counter.incrementAndGet() + "-" + swiss.id() + ".pgn"),
                    client.tournaments().pgnGamesBySwissId(swiss.id(), params -> params.
                        evals(evals).
                        clocks(clocks)).
                    stream().
                    map(Pgn::toString).
                    collect(Collectors.joining("\n\n")));
        } catch (IOException ioe) { throw new UncheckedIOException(ioe); }
        });

/exit

Run with jshell which comes with Java. Can be downkloaded at https://jdk.java.net/21 for instance.

$ jshell tournaments.jsh

$ ls coders/arenas/
1-QQDJENHA.pgn
$ ls coders/swiss/
1-5M5GxDJm.pgn