001/*
002 * SPDX-License-Identifier: Apache-2.0
003 *
004 * Copyright 2025-2026 The Enola <https://enola.dev> Authors
005 *
006 * Licensed under the Apache License, Version 2.0 (the "License");
007 * you may not use this file except in compliance with the License.
008 * You may obtain a copy of the License at
009 *
010 *     https://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package dev.enola.common.linereader;
019
020import org.jspecify.annotations.Nullable;
021
022import java.io.Console;
023import java.util.Map;
024
025/** ConsoleIO is an {@link IO} implementation based on {@link Console}. */
026public class ConsoleIO extends SystemInOutIO {
027    private final Console console;
028
029    private static Console console() {
030        var console = System.console();
031        if (console == null)
032            throw new IllegalStateException("Use another implementation of interface IO");
033        return console;
034    }
035
036    public ConsoleIO(Map<String, String> env) {
037        super(env, console().charset(), console().charset(), console().charset());
038        console = console();
039    }
040
041    public ConsoleIO() {
042        this(System.getenv());
043    }
044
045    @Override
046    public @Nullable String readLine() {
047        return console.readLine();
048    }
049
050    @Override
051    public @Nullable String readLine(String prompt) {
052        printf(prompt);
053        return readLine();
054    }
055
056    @Override
057    public void printf(String format, Object... args) {
058        console.printf(format, args);
059    }
060}