first commit

.gitignore

@@ -0,0 +1,43 @@
+.gradle
+build/
+!gradle/wrapper/gradle-wrapper.jar
+!**/src/main/**/build/
+!**/src/test/**/build/
+.kotlin
+
+### IntelliJ IDEA ###
+.idea/modules.xml
+.idea/jarRepositories.xml
+.idea/compiler.xml
+.idea/libraries/
+*.iws
+*.iml
+*.ipr
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+
+### Eclipse ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/
+
+### Mac OS ###
+.DS_Store

build.gradle.kts

@@ -0,0 +1,25 @@
+plugins {
+    java
+    id("com.gradleup.shadow") version "9.3.1" apply false
+}
+
+allprojects {
+    group = "dev.loki"
+    version = "0.0.1"
+
+    repositories {
+        mavenCentral()
+        maven {
+            name = "papermc"
+            url = uri("https://repo.papermc.io/repository/maven-public/")
+        }
+    }
+}
+
+subprojects {
+    apply(plugin = "java")
+
+    java {
+        toolchain.languageVersion.set(JavaLanguageVersion.of(21))
+    }
+}

common/build.gradle.kts

@@ -0,0 +1,6 @@
+dependencies {
+    implementation("com.zaxxer:HikariCP:7.0.2")
+    implementation("org.postgresql:postgresql:42.7.10")
+    implementation("org.xerial:sqlite-jdbc:3.49.1.0")
+    implementation("org.yaml:snakeyaml:2.3")
+}

common/src/main/java/dev/loki/loAuth/common/cfg/DbConfig.java

@@ -0,0 +1,19 @@
+package dev.loki.loAuth.common.cfg;
+
+public interface DbConfig {
+    String getDbType();
+    String getDbHost();
+    int    getDbPort();
+    String getDbName();
+    String getDbUser();
+    String getDbPassword();
+    int    getAuthTimeoutSeconds();
+    int    getVerificationCodeLength();
+
+    default String getJdbcUrl() {
+        if ("sqlite".equals(getDbType())) {
+            return "jdbc:sqlite:" + getDbName();
+        }
+        return "jdbc:postgresql://" + getDbHost() + ":" + getDbPort() + "/" + getDbName();
+    }
+}

common/src/main/java/dev/loki/loAuth/common/cfg/YamlConfig.java

@@ -0,0 +1,50 @@
+package dev.loki.loAuth.common.cfg;
+
+import org.yaml.snakeyaml.Yaml;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.Map;
+
+public final class YamlConfig {
+
+    private final Map<String, Object> data;
+
+    @SuppressWarnings("unchecked")
+    public YamlConfig(final Path path) throws IOException {
+        Yaml yaml = new Yaml();
+        try (InputStream in = Files.newInputStream(path)) {
+            Object loaded = yaml.load(in);
+            if (loaded instanceof Map) {
+                this.data = (Map<String, Object>) loaded;
+            } else {
+                throw new IOException("Invalid config format: expected a map at root");
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    public <T> T getRequired(final String key, final Class<T> type) {
+        Object val = data.get(key);
+        if (val == null) {
+            throw new IllegalStateException("Missing config key: '" + key + "'");
+        }
+        if (!type.isInstance(val)) {
+            throw new IllegalStateException("Config key '" + key + "' has wrong type: expected " + type.getSimpleName());
+        }
+        return (T) val;
+    }
+
+    @SuppressWarnings("unchecked")
+    public <T> T get(final String key, final T defaultValue) {
+        Object val = data.get(key);
+        if (val == null) return defaultValue;
+        try {
+            return (T) val;
+        } catch (ClassCastException e) {
+            return defaultValue;
+        }
+    }
+}

common/src/main/java/dev/loki/loAuth/common/db/DatabaseManager.java

@@ -0,0 +1,485 @@
+package dev.loki.loAuth.common.db;
+
+import dev.loki.loAuth.common.cfg.DbConfig;
+import dev.loki.loAuth.common.exception.DatabaseException;
+import dev.loki.loAuth.common.exception.DuplicateUserException;
+import dev.loki.loAuth.common.model.User;
+import dev.loki.loAuth.common.util.CodeGenerator;
+import com.zaxxer.hikari.HikariConfig;
+import com.zaxxer.hikari.HikariDataSource;
+
+import java.sql.*;
+import java.time.Instant;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Optional;
+
+public final class DatabaseManager implements AutoCloseable {
+
+    private final HikariDataSource ds;
+    private final DbConfig cfg;
+    private final boolean sqlite;
+
+    public DatabaseManager(final DbConfig cfg, final String appName, final int maxPoolSize) {
+        this.cfg = cfg;
+        this.sqlite = "sqlite".equals(cfg.getDbType());
+
+        HikariConfig hikari = new HikariConfig();
+        hikari.setJdbcUrl(cfg.getJdbcUrl());
+
+        if (sqlite) {
+            hikari.setDriverClassName("org.sqlite.JDBC");
+            hikari.setMaximumPoolSize(1);
+            hikari.setMinimumIdle(1);
+            hikari.setConnectionTimeout(30_000);
+            hikari.addDataSourceProperty("journal_mode", "WAL");
+            hikari.addDataSourceProperty("busy_timeout", "30000");
+        } else {
+            try {
+                Class.forName("org.postgresql.Driver");
+            } catch (ClassNotFoundException e) {
+                throw new RuntimeException("PostgreSQL driver not found", e);
+            }
+            hikari.setUsername(cfg.getDbUser());
+            hikari.setPassword(cfg.getDbPassword());
+            hikari.setMaximumPoolSize(maxPoolSize);
+            hikari.setMinimumIdle(Math.min(2, maxPoolSize));
+            hikari.setConnectionTimeout(30_000);
+            hikari.setIdleTimeout(600_000);
+            hikari.setMaxLifetime(1_800_000);
+            hikari.addDataSourceProperty("sslmode", "prefer");
+            hikari.addDataSourceProperty("ApplicationName", appName);
+            hikari.setDriverClassName("org.postgresql.Driver");
+        }
+
+        this.ds = new HikariDataSource(hikari);
+        initSchema();
+    }
+
+    // ─── Schema ────────────────────────────────────────────────────────────────
+
+    private void initSchema() {
+        String usersTable = sqlite ? """
+            CREATE TABLE IF NOT EXISTS users (
+                id              INTEGER PRIMARY KEY AUTOINCREMENT,
+                minecraft_nick  TEXT    NOT NULL,
+                discord_id      TEXT    NOT NULL,
+                created_at      TEXT    NOT NULL DEFAULT (datetime('now')),
+                updated_at      TEXT    NOT NULL DEFAULT (datetime('now')),
+                UNIQUE (minecraft_nick),
+                UNIQUE (discord_id)
+            )
+            """ : """
+            CREATE TABLE IF NOT EXISTS users (
+                id              BIGSERIAL    PRIMARY KEY,
+                minecraft_nick  VARCHAR(16)  NOT NULL,
+                discord_id      VARCHAR(20)  NOT NULL,
+                created_at      TIMESTAMPTZ  NOT NULL DEFAULT NOW(),
+                updated_at      TIMESTAMPTZ  NOT NULL DEFAULT NOW(),
+                CONSTRAINT uq_minecraft_nick UNIQUE (minecraft_nick),
+                CONSTRAINT uq_discord_id     UNIQUE (discord_id),
+                CONSTRAINT ck_minecraft_nick CHECK (minecraft_nick ~ '^[a-zA-Z0-9_]{3,16}$'),
+                CONSTRAINT ck_discord_id     CHECK (discord_id ~ '^[0-9]{17,20}$')
+            )
+            """;
+
+        String verificationsTable = sqlite ? """
+            CREATE TABLE IF NOT EXISTS pending_verifications (
+                code            TEXT    PRIMARY KEY,
+                minecraft_nick  TEXT    NOT NULL UNIQUE,
+                expires_at      INTEGER NOT NULL
+            )
+            """ : """
+            CREATE TABLE IF NOT EXISTS pending_verifications (
+                code            VARCHAR(16)  PRIMARY KEY,
+                minecraft_nick  VARCHAR(16)  NOT NULL,
+                expires_at      BIGINT       NOT NULL,
+                CONSTRAINT uq_pv_minecraft_nick UNIQUE (minecraft_nick)
+            )
+            """;
+
+        String loginsTable = sqlite ? """
+            CREATE TABLE IF NOT EXISTS pending_logins (
+                token           TEXT    PRIMARY KEY,
+                discord_id      TEXT    NOT NULL UNIQUE,
+                minecraft_nick  TEXT    NOT NULL UNIQUE,
+                message_id      TEXT,
+                expires_at      INTEGER NOT NULL
+            )
+            """ : """
+            CREATE TABLE IF NOT EXISTS pending_logins (
+                token           VARCHAR(16)  PRIMARY KEY,
+                discord_id      VARCHAR(20)  NOT NULL,
+                minecraft_nick  VARCHAR(16)  NOT NULL,
+                message_id      VARCHAR(20),
+                expires_at      BIGINT       NOT NULL,
+                CONSTRAINT uq_pl_discord_id     UNIQUE (discord_id),
+                CONSTRAINT uq_pl_minecraft_nick UNIQUE (minecraft_nick)
+            )
+            """;
+
+        try (Connection conn = ds.getConnection();
+             Statement stmt = conn.createStatement()) {
+            stmt.execute(usersTable);
+            stmt.execute(verificationsTable);
+            stmt.execute(loginsTable);
+        } catch (SQLException e) {
+            throw new IllegalStateException("Failed to initialize DB schema", e);
+        }
+    }
+
+    // ─── Users ────────────────────────────────────────────────────────────────
+
+    public User addUser(final String minecraftNick, final String discordId) {
+        validateNick(minecraftNick);
+        validateDiscordId(discordId);
+
+        String sql = sqlite ? """
+            INSERT INTO users (minecraft_nick, discord_id)
+            VALUES (?, ?)
+            """ : """
+            INSERT INTO users (minecraft_nick, discord_id)
+            VALUES (?, ?)
+            RETURNING id, minecraft_nick, discord_id, created_at
+            """;
+
+        try (Connection conn = ds.getConnection();
+             PreparedStatement ps = conn.prepareStatement(sql)) {
+            ps.setString(1, minecraftNick);
+            ps.setString(2, discordId);
+
+            if (sqlite) {
+                ps.executeUpdate();
+                try (Statement stmt = conn.createStatement();
+                     ResultSet rs = stmt.executeQuery("SELECT last_insert_rowid()")) {
+                    if (rs.next()) {
+                        return new User(rs.getLong(1), minecraftNick, discordId, Instant.now());
+                    }
+                }
+                throw new SQLException("INSERT returned no rows");
+            } else {
+                try (ResultSet rs = ps.executeQuery()) {
+                    if (rs.next()) return mapUser(rs);
+                    throw new SQLException("INSERT returned no rows");
+                }
+            }
+        } catch (SQLException e) {
+            throw translateSqlException(e);
+        }
+    }
+
+    public boolean isRegistered(final String minecraftNick) {
+        try (Connection conn = ds.getConnection();
+             PreparedStatement ps = conn.prepareStatement(
+                 "SELECT 1 FROM users WHERE LOWER(minecraft_nick) = LOWER(?) LIMIT 1")) {
+            ps.setString(1, minecraftNick);
+            try (ResultSet rs = ps.executeQuery()) {
+                return rs.next();
+            }
+        } catch (SQLException e) {
+            throw new DatabaseException("DB error in isRegistered", e);
+        }
+    }
+
+    public Optional<User> findByDiscordId(final String discordId) {
+        validateDiscordId(discordId);
+        return queryOneUser(
+            "SELECT id, minecraft_nick, discord_id, created_at FROM users WHERE discord_id = ?",
+            discordId
+        );
+    }
+
+    public Optional<User> findByMinecraftNick(final String nick) {
+        validateNick(nick);
+        return queryOneUser(
+            "SELECT id, minecraft_nick, discord_id, created_at FROM users WHERE LOWER(minecraft_nick) = LOWER(?)",
+            nick
+        );
+    }
+
+    public boolean removeUser(final String discordId) {
+        validateDiscordId(discordId);
+        try (Connection conn = ds.getConnection();
+             PreparedStatement ps = conn.prepareStatement("DELETE FROM users WHERE discord_id = ?")) {
+            ps.setString(1, discordId);
+            return ps.executeUpdate() > 0;
+        } catch (SQLException e) {
+            throw new DatabaseException("Failed to remove user", e);
+        }
+    }
+
+    // ─── Pending Verifications ────────────────────────────────────────────────
+
+    public String createVerificationCode(final String minecraftNick) {
+        validateNick(minecraftNick);
+        String code = CodeGenerator.generate(cfg.getVerificationCodeLength());
+        long expiresAt = Instant.now().getEpochSecond() + cfg.getAuthTimeoutSeconds();
+
+        String sql = sqlite ? """
+            INSERT INTO pending_verifications (code, minecraft_nick, expires_at)
+            VALUES (?, ?, ?)
+            ON CONFLICT(minecraft_nick) DO UPDATE
+                SET code = excluded.code, expires_at = excluded.expires_at
+            """ : """
+            INSERT INTO pending_verifications (code, minecraft_nick, expires_at)
+            VALUES (?, ?, ?)
+            ON CONFLICT (minecraft_nick) DO UPDATE
+                SET code = EXCLUDED.code, expires_at = EXCLUDED.expires_at
+            """;
+
+        try (Connection conn = ds.getConnection();
+             PreparedStatement ps = conn.prepareStatement(sql)) {
+            ps.setString(1, code);
+            ps.setString(2, minecraftNick);
+            ps.setLong(3, expiresAt);
+            ps.executeUpdate();
+        } catch (SQLException e) {
+            throw new DatabaseException("Failed to create verification code", e);
+        }
+        return code;
+    }
+
+    public Optional<String> consumeVerificationCode(final String code) {
+        if (sqlite) return consumeDeleteSelect("pending_verifications", "code", code);
+        try (Connection conn = ds.getConnection();
+             PreparedStatement ps = conn.prepareStatement("""
+                DELETE FROM pending_verifications
+                WHERE code = ? AND expires_at > ?
+                RETURNING minecraft_nick
+                """)) {
+            ps.setString(1, code);
+            ps.setLong(2, Instant.now().getEpochSecond());
+            try (ResultSet rs = ps.executeQuery()) {
+                return rs.next() ? Optional.of(rs.getString("minecraft_nick")) : Optional.empty();
+            }
+        } catch (SQLException e) {
+            throw new DatabaseException("Failed to consume verification code", e);
+        }
+    }
+
+    // ─── Pending Logins ───────────────────────────────────────────────────────
+
+    public String createLoginToken(final String minecraftNick, final String discordId) {
+        validateNick(minecraftNick);
+        validateDiscordId(discordId);
+        String token = CodeGenerator.generate(16);
+        long expiresAt = Instant.now().getEpochSecond() + cfg.getAuthTimeoutSeconds();
+
+        String sql = sqlite ? """
+            INSERT INTO pending_logins (token, discord_id, minecraft_nick, expires_at)
+            VALUES (?, ?, ?, ?)
+            ON CONFLICT(discord_id) DO UPDATE
+                SET token = excluded.token,
+                    minecraft_nick = excluded.minecraft_nick,
+                    message_id = NULL,
+                    expires_at = excluded.expires_at
+            """ : """
+            INSERT INTO pending_logins (token, discord_id, minecraft_nick, expires_at)
+            VALUES (?, ?, ?, ?)
+            ON CONFLICT (discord_id) DO UPDATE
+                SET token = EXCLUDED.token,
+                    minecraft_nick = EXCLUDED.minecraft_nick,
+                    message_id = NULL,
+                    expires_at = EXCLUDED.expires_at
+            """;
+
+        try (Connection conn = ds.getConnection();
+             PreparedStatement ps = conn.prepareStatement(sql)) {
+            ps.setString(1, token);
+            ps.setString(2, discordId);
+            ps.setString(3, minecraftNick);
+            ps.setLong(4, expiresAt);
+            ps.executeUpdate();
+        } catch (SQLException e) {
+            throw new DatabaseException("Failed to create login token", e);
+        }
+        return token;
+    }
+
+    public void updateLoginMessageId(final String token, final String messageId) {
+        try (Connection conn = ds.getConnection();
+             PreparedStatement ps = conn.prepareStatement(
+                 "UPDATE pending_logins SET message_id = ? WHERE token = ?")) {
+            ps.setString(1, messageId);
+            ps.setString(2, token);
+            ps.executeUpdate();
+        } catch (SQLException e) {
+            throw new DatabaseException("Failed to update message id", e);
+        }
+    }
+
+    public Optional<String> consumeLoginToken(final String token) {
+        if (sqlite) return consumeDeleteSelect("pending_logins", "token", token);
+        try (Connection conn = ds.getConnection();
+             PreparedStatement ps = conn.prepareStatement("""
+                DELETE FROM pending_logins
+                WHERE token = ? AND expires_at > ?
+                RETURNING minecraft_nick
+                """)) {
+            ps.setString(1, token);
+            ps.setLong(2, Instant.now().getEpochSecond());
+            try (ResultSet rs = ps.executeQuery()) {
+                return rs.next() ? Optional.of(rs.getString("minecraft_nick")) : Optional.empty();
+            }
+        } catch (SQLException e) {
+            throw new DatabaseException("Failed to consume login token", e);
+        }
+    }
+
+    public Optional<String> consumeLoginTokenByMessageId(final String messageId) {
+        if (sqlite) return consumeDeleteSelect("pending_logins", "message_id", messageId);
+        try (Connection conn = ds.getConnection();
+             PreparedStatement ps = conn.prepareStatement("""
+                DELETE FROM pending_logins
+                WHERE message_id = ? AND expires_at > ?
+                RETURNING minecraft_nick
+                """)) {
+            ps.setString(1, messageId);
+            ps.setLong(2, Instant.now().getEpochSecond());
+            try (ResultSet rs = ps.executeQuery()) {
+                return rs.next() ? Optional.of(rs.getString("minecraft_nick")) : Optional.empty();
+            }
+        } catch (SQLException e) {
+            throw new DatabaseException("Failed to consume login token by message id", e);
+        }
+    }
+
+    public boolean isTokenConsumed(final String token) {
+        try (Connection conn = ds.getConnection();
+             PreparedStatement ps = conn.prepareStatement(
+                 "SELECT 1 FROM pending_logins WHERE token = ? AND expires_at > ? LIMIT 1")) {
+            ps.setString(1, token);
+            ps.setLong(2, Instant.now().getEpochSecond());
+            try (ResultSet rs = ps.executeQuery()) {
+                return !rs.next();
+            }
+        } catch (SQLException e) {
+            throw new DatabaseException("DB error in isTokenConsumed", e);
+        }
+    }
+
+    public void deleteLoginToken(final String token) {
+        try (Connection conn = ds.getConnection();
+             PreparedStatement ps = conn.prepareStatement("DELETE FROM pending_logins WHERE token = ?")) {
+            ps.setString(1, token);
+            ps.executeUpdate();
+        } catch (SQLException e) {
+            throw new DatabaseException("Failed to delete login token", e);
+        }
+    }
+
+    public List<String> popExpiredLogins() {
+        long now = Instant.now().getEpochSecond();
+        List<String> nicks = new ArrayList<>();
+
+        if (sqlite) {
+            try (Connection conn = ds.getConnection()) {
+                try (PreparedStatement ps = conn.prepareStatement(
+                    "SELECT minecraft_nick FROM pending_logins WHERE expires_at <= ?")) {
+                    ps.setLong(1, now);
+                    try (ResultSet rs = ps.executeQuery()) {
+                        while (rs.next()) nicks.add(rs.getString("minecraft_nick"));
+                    }
+                }
+                if (!nicks.isEmpty()) {
+                    try (PreparedStatement ps = conn.prepareStatement(
+                        "DELETE FROM pending_logins WHERE expires_at <= ?")) {
+                        ps.setLong(1, now);
+                        ps.executeUpdate();
+                    }
+                }
+            } catch (SQLException e) {
+                throw new DatabaseException("Failed to pop expired logins", e);
+            }
+            return nicks;
+        }
+
+        try (Connection conn = ds.getConnection();
+             PreparedStatement ps = conn.prepareStatement(
+                 "DELETE FROM pending_logins WHERE expires_at <= ? RETURNING minecraft_nick")) {
+            ps.setLong(1, now);
+            try (ResultSet rs = ps.executeQuery()) {
+                while (rs.next()) nicks.add(rs.getString("minecraft_nick"));
+            }
+        } catch (SQLException e) {
+            throw new DatabaseException("Failed to pop expired logins", e);
+        }
+        return nicks;
+    }
+
+    // ─── Helpers ──────────────────────────────────────────────────────────────
+
+    private Optional<String> consumeDeleteSelect(final String table, final String column, final String value) {
+        long now = Instant.now().getEpochSecond();
+        try (Connection conn = ds.getConnection()) {
+            Optional<String> result;
+            try (PreparedStatement ps = conn.prepareStatement(
+                "SELECT minecraft_nick FROM " + table + " WHERE " + column + " = ? AND expires_at > ?")) {
+                ps.setString(1, value);
+                ps.setLong(2, now);
+                try (ResultSet rs = ps.executeQuery()) {
+                    result = rs.next() ? Optional.of(rs.getString("minecraft_nick")) : Optional.empty();
+                }
+            }
+            if (result.isPresent()) {
+                try (PreparedStatement ps = conn.prepareStatement(
+                    "DELETE FROM " + table + " WHERE " + column + " = ?")) {
+                    ps.setString(1, value);
+                    ps.executeUpdate();
+                }
+            }
+            return result;
+        } catch (SQLException e) {
+            throw new DatabaseException("Failed to consume from " + table, e);
+        }
+    }
+
+    private Optional<User> queryOneUser(final String sql, final String param) {
+        try (Connection conn = ds.getConnection();
+             PreparedStatement ps = conn.prepareStatement(sql)) {
+            ps.setString(1, param);
+            try (ResultSet rs = ps.executeQuery()) {
+                return rs.next() ? Optional.of(mapUser(rs)) : Optional.empty();
+            }
+        } catch (SQLException e) {
+            throw new DatabaseException("Query failed", e);
+        }
+    }
+
+    private static User mapUser(final ResultSet rs) throws SQLException {
+        return new User(
+            rs.getLong("id"),
+            rs.getString("minecraft_nick"),
+            rs.getString("discord_id"),
+            rs.getTimestamp("created_at").toInstant()
+        );
+    }
+
+    private static void validateNick(final String nick) {
+        if (nick == null || !nick.matches("^[a-zA-Z0-9_]{3,16}$"))
+            throw new IllegalArgumentException("Invalid Minecraft nick: " + nick);
+    }
+
+    private static void validateDiscordId(final String id) {
+        if (id == null || !id.matches("^[0-9]{17,20}$"))
+            throw new IllegalArgumentException("Invalid Discord ID: " + id);
+    }
+
+    private static RuntimeException translateSqlException(final SQLException e) {
+        String state = e.getSQLState();
+        if ("23505".equals(state) || "23000".equals(state)) {
+            String msg = e.getMessage();
+            if (msg != null && (msg.contains("minecraft_nick") || msg.contains("UNIQUE constraint failed: users.minecraft_nick")))
+                return new DuplicateUserException("Minecraft nick already registered");
+            if (msg != null && (msg.contains("discord_id") || msg.contains("UNIQUE constraint failed: users.discord_id")))
+                return new DuplicateUserException("Discord ID already registered");
+            return new DuplicateUserException("Duplicate entry");
+        }
+        return new DatabaseException("Database error", e);
+    }
+
+    @Override
+    public void close() {
+        ds.close();
+    }
+}

common/src/main/java/dev/loki/loAuth/common/exception/DatabaseException.java

@@ -0,0 +1,5 @@
+package dev.loki.loAuth.common.exception;
+
+public final class DatabaseException extends RuntimeException {
+    public DatabaseException(String msg, Throwable cause) { super(msg, cause); }
+}

common/src/main/java/dev/loki/loAuth/common/exception/DuplicateUserException.java

@@ -0,0 +1,5 @@
+package dev.loki.loAuth.common.exception;
+
+public final class DuplicateUserException extends RuntimeException {
+    public DuplicateUserException(String msg) { super(msg); }
+}

common/src/main/java/dev/loki/loAuth/common/model/User.java

@@ -0,0 +1,3 @@
+package dev.loki.loAuth.common.model;
+
+public record User(long id, String minecraftNick, String discordId, java.time.Instant createdAt) {}

common/src/main/java/dev/loki/loAuth/common/util/CodeGenerator.java

@@ -0,0 +1,21 @@
+package dev.loki.loAuth.common.util;
+
+import java.security.SecureRandom;
+
+public final class CodeGenerator {
+
+    private static final String ALPHABET = "ABCDEFGHJKLMNPQRSTUVWXYZ23456789";
+    private static final SecureRandom RNG = new SecureRandom();
+
+    private CodeGenerator() {}
+
+    public static String generate(final int length) {
+        if (length < 4 || length > 16)
+            throw new IllegalArgumentException("Code length must be between 4 and 16");
+
+        StringBuilder sb = new StringBuilder(length);
+        for (int i = 0; i < length; i++)
+            sb.append(ALPHABET.charAt(RNG.nextInt(ALPHABET.length())));
+        return sb.toString();
+    }
+}

discord/build.gradle.kts

@@ -0,0 +1,21 @@
+import com.github.jengelman.gradle.plugins.shadow.tasks.ShadowJar
+
+plugins {
+    id("com.gradleup.shadow")
+}
+
+dependencies {
+    implementation(project(":common"))
+    implementation("net.dv8tion:JDA:6.4.0")
+    implementation("org.slf4j:slf4j-api:2.0.17")
+    runtimeOnly("ch.qos.logback:logback-classic:1.5.31")
+}
+
+tasks.named<ShadowJar>("shadowJar") {
+    archiveBaseName.set("discord")
+    archiveClassifier.set("standalone")
+
+    manifest {
+        attributes["Main-Class"] = "dev.loki.loAuth.discord.BotLauncher"
+    }
+}

discord/src/main/java/dev/loki/loAuth/discord/Bot.java

@@ -0,0 +1,48 @@
+package dev.loki.loAuth.discord;
+
+import dev.loki.loAuth.common.db.DatabaseManager;
+import dev.loki.loAuth.discord.auth.AuthService;
+import dev.loki.loAuth.discord.cfg.BotConfig;
+import dev.loki.loAuth.discord.listener.LoginReactionListener;
+import dev.loki.loAuth.discord.listener.VerifyListener;
+import net.dv8tion.jda.api.JDA;
+import net.dv8tion.jda.api.JDABuilder;
+import net.dv8tion.jda.api.OnlineStatus;
+import net.dv8tion.jda.api.requests.GatewayIntent;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public final class Bot {
+
+    private static final Logger log = LoggerFactory.getLogger(Bot.class);
+
+    private final BotConfig cfg;
+    private final DatabaseManager db;
+    private final JDA jda;
+    private final AuthService auth;
+
+    public Bot(final BotConfig cfg) {
+        this.cfg = cfg;
+        this.db = new DatabaseManager(cfg, "loAuthBot", 10);
+        this.jda = JDABuilder
+            .createDefault(cfg.getToken(),
+                GatewayIntent.DIRECT_MESSAGES,
+                GatewayIntent.DIRECT_MESSAGE_REACTIONS,
+                GatewayIntent.MESSAGE_CONTENT)
+            .setStatus(OnlineStatus.ONLINE)
+            .build();
+        this.auth = new AuthService(db, cfg, jda);
+
+        jda.addEventListener(
+            new VerifyListener(auth),
+            new LoginReactionListener(db)
+        );
+    }
+
+    public void shutdown() {
+        auth.close();
+        db.close();
+        jda.shutdown();
+        log.info("loAuth bot shut down.");
+    }
+}

discord/src/main/java/dev/loki/loAuth/discord/BotLauncher.java

@@ -0,0 +1,42 @@
+package dev.loki.loAuth.discord;
+
+import dev.loki.loAuth.discord.cfg.BotCfg;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.nio.file.Files;
+import java.nio.file.Path;
+
+public final class BotLauncher {
+
+    private static final Logger log = LoggerFactory.getLogger(BotLauncher.class);
+
+    public static void main(final String[] args) {
+        BotCfg cfg;
+        try {
+            cfg = new BotCfg(getOrCreateConfig("config.yml"));
+        } catch (IOException e) {
+            log.error("Failed to load config: {}", e.getMessage());
+            return;
+        }
+
+        Bot bot = new Bot(cfg);
+
+        Runtime.getRuntime().addShutdownHook(new Thread(bot::shutdown, "shutdown"));
+
+        log.info("loAuth bot started.");
+    }
+
+    private static Path getOrCreateConfig(final String fileName) throws IOException {
+        Path path = Path.of(System.getProperty("user.dir")).resolve(fileName);
+        if (Files.notExists(path)) {
+            try (InputStream in = BotLauncher.class.getResourceAsStream("/" + fileName)) {
+                if (in == null) throw new IOException("Resource not found: " + fileName);
+                Files.copy(in, path);
+            }
+        }
+        return path;
+    }
+}

discord/src/main/java/dev/loki/loAuth/discord/auth/AuthService.java

@@ -0,0 +1,89 @@
+package dev.loki.loAuth.discord.auth;
+
+import dev.loki.loAuth.common.db.DatabaseManager;
+import dev.loki.loAuth.discord.cfg.BotConfig;
+import net.dv8tion.jda.api.JDA;
+import net.dv8tion.jda.api.entities.User;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.List;
+import java.util.Optional;
+import java.util.concurrent.*;
+
+public final class AuthService implements AutoCloseable {
+
+    private static final Logger log = LoggerFactory.getLogger(AuthService.class);
+
+    private final DatabaseManager db;
+    private final BotConfig cfg;
+    private final JDA jda;
+    private final ScheduledExecutorService scheduler;
+
+    public AuthService(final DatabaseManager db, final BotConfig cfg, final JDA jda) {
+        this.db = db;
+        this.cfg = cfg;
+        this.jda = jda;
+        this.scheduler = Executors.newSingleThreadScheduledExecutor(r -> {
+            Thread t = new Thread(r, "auth-expiry");
+            t.setDaemon(true);
+            return t;
+        });
+
+        int ttl = cfg.getAuthTimeoutSeconds();
+        scheduler.scheduleAtFixedRate(this::kickExpiredLogins, ttl, ttl, TimeUnit.SECONDS);
+    }
+
+    public void verifyNewUser(final String code, final String discordId) {
+        Optional<String> nick = db.consumeVerificationCode(code.toUpperCase());
+        if (nick.isEmpty()) throw new IllegalArgumentException("Invalid or expired code: " + code);
+        db.addUser(nick.get(), discordId);
+        log.info("New user registered: {} -> {}", nick.get(), discordId);
+    }
+
+    public void requestLoginApproval(final String minecraftNick, final String discordId) {
+        String token = db.createLoginToken(minecraftNick, discordId);
+
+        User discordUser = jda.retrieveUserById(discordId).complete();
+        discordUser.openPrivateChannel().queue(channel ->
+            channel.sendMessage(
+                "🔐 **Запрос на вход**\n" +
+                "Игрок **" + minecraftNick + "** пытается зайти на сервер.\n" +
+                "Поставь реакцию ✅ на это сообщение чтобы разрешить вход.\n" +
+                "Сообщение истекает через " + cfg.getAuthTimeoutSeconds() + " секунд."
+            ).queue(message -> {
+                message.addReaction(net.dv8tion.jda.api.entities.emoji.Emoji.fromUnicode("✅")).queue();
+                db.updateLoginMessageId(token, message.getId());
+            }),
+            error -> log.warn("Cannot send DM to {}: {}", discordId, error.getMessage())
+        );
+    }
+
+    public void approveLogin(final String discordId) {
+        db.findByDiscordId(discordId).ifPresent(user -> {
+            Optional<String> nick = db.consumeLoginToken(findTokenByDiscordId(discordId));
+            nick.ifPresent(n -> log.info("Login approved for {} ({})", n, discordId));
+        });
+    }
+
+    private String findTokenByDiscordId(final String discordId) {
+        // Ищем токен через БД — запрос по discord_id в pending_logins
+        // consumeLoginToken вызывается из LoginReactionListener напрямую по token из message
+        return discordId; // placeholder — см. LoginReactionListener
+    }
+
+    private void kickExpiredLogins() {
+        try {
+            List<String> expired = db.popExpiredLogins();
+            if (!expired.isEmpty())
+                log.info("Expired logins cleaned up: {}", expired);
+        } catch (Exception e) {
+            log.error("Error during expired login cleanup", e);
+        }
+    }
+
+    @Override
+    public void close() {
+        scheduler.shutdown();
+    }
+}

discord/src/main/java/dev/loki/loAuth/discord/cfg/BotCfg.java

@@ -0,0 +1,25 @@
+package dev.loki.loAuth.discord.cfg;
+
+import dev.loki.loAuth.common.cfg.YamlConfig;
+
+import java.io.IOException;
+import java.nio.file.Path;
+
+public final class BotCfg implements BotConfig {
+
+    private final YamlConfig cfg;
+
+    public BotCfg(final Path configPath) throws IOException {
+        cfg = new YamlConfig(configPath);
+    }
+
+    @Override public String getToken()                   { return cfg.getRequired("token",                   String.class); }
+    @Override public String getDbType()                  { return cfg.getRequired("db_type",                 String.class); }
+    @Override public String getDbHost()                  { return cfg.getRequired("db_host",                 String.class); }
+    @Override public int    getDbPort()                  { return cfg.getRequired("db_port",                 Integer.class); }
+    @Override public String getDbName()                  { return cfg.getRequired("db_name",                 String.class); }
+    @Override public String getDbUser()                  { return cfg.getRequired("db_user",                 String.class); }
+    @Override public String getDbPassword()              { return cfg.getRequired("db_password",             String.class); }
+    @Override public int    getAuthTimeoutSeconds()      { return cfg.getRequired("auth_timeout_seconds",    Integer.class); }
+    @Override public int    getVerificationCodeLength()  { return cfg.getRequired("verification_code_length",Integer.class); }
+}

discord/src/main/java/dev/loki/loAuth/discord/cfg/BotConfig.java

@@ -0,0 +1,7 @@
+package dev.loki.loAuth.discord.cfg;
+
+import dev.loki.loAuth.common.cfg.DbConfig;
+
+public interface BotConfig extends DbConfig {
+    String getToken();
+}

discord/src/main/java/dev/loki/loAuth/discord/listener/LoginReactionListener.java

@@ -0,0 +1,30 @@
+package dev.loki.loAuth.discord.listener;
+
+import dev.loki.loAuth.common.db.DatabaseManager;
+import net.dv8tion.jda.api.events.message.react.MessageReactionAddEvent;
+import net.dv8tion.jda.api.hooks.ListenerAdapter;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public final class LoginReactionListener extends ListenerAdapter {
+
+    private static final Logger log = LoggerFactory.getLogger(LoginReactionListener.class);
+    private static final String CHECKMARK = "✅";
+
+    private final DatabaseManager db;
+
+    public LoginReactionListener(final DatabaseManager db) {
+        this.db = db;
+    }
+
+    @Override
+    public void onMessageReactionAdd(final MessageReactionAddEvent event) {
+        if (event.getUser() == null || event.getUser().isBot()) return;
+        if (!CHECKMARK.equals(event.getReaction().getEmoji().getName())) return;
+
+        // Ищем токен по message_id — бот сохранил его при отправке
+        db.consumeLoginTokenByMessageId(event.getMessageId()).ifPresent(nick ->
+            log.info("Login approved for {} via reaction.", nick)
+        );
+    }
+}

discord/src/main/java/dev/loki/loAuth/discord/listener/VerifyListener.java

@@ -0,0 +1,45 @@
+package dev.loki.loAuth.discord.listener;
+
+import dev.loki.loAuth.common.exception.DuplicateUserException;
+import dev.loki.loAuth.discord.auth.AuthService;
+import net.dv8tion.jda.api.entities.channel.ChannelType;
+import net.dv8tion.jda.api.events.message.MessageReceivedEvent;
+import net.dv8tion.jda.api.hooks.ListenerAdapter;
+
+public final class VerifyListener extends ListenerAdapter {
+
+    private static final String COMMAND = "!verify";
+
+    private final AuthService auth;
+
+    public VerifyListener(final AuthService auth) {
+        this.auth = auth;
+    }
+
+    @Override
+    public void onMessageReceived(final MessageReceivedEvent event) {
+        if (event.getAuthor().isBot()) return;
+        if (!event.isFromType(ChannelType.PRIVATE)) return;
+
+        String content = event.getMessage().getContentRaw().trim();
+        if (!content.toUpperCase().startsWith(COMMAND)) return;
+
+        String[] parts = content.split("\\s+", 2);
+        if (parts.length < 2) {
+            event.getChannel().sendMessage("Использование: `!verify КОД`").queue();
+            return;
+        }
+
+        String code = parts[1].trim().toUpperCase();
+        String discordId = event.getAuthor().getId();
+
+        try {
+            auth.verifyNewUser(code, discordId);
+            event.getChannel().sendMessage("✅ Ты успешно зарегистрирован! Можешь заходить на сервер.").queue();
+        } catch (IllegalArgumentException e) {
+            event.getChannel().sendMessage("❌ Неверный или просроченный код. Зайди на сервер снова чтобы получить новый.").queue();
+        } catch (DuplicateUserException e) {
+            event.getChannel().sendMessage("⚠️ Этот Discord аккаунт уже привязан к другому игроку.").queue();
+        }
+    }
+}

discord/src/main/resources/config.yml

@@ -0,0 +1,12 @@
+mode: "standalone"  # standalone | embedded
+token: "token_here"
+
+db_type: "postgresql"  # postgresql | sqlite
+db_host: "localhost"
+db_port: 5432
+db_name: "mydb"
+db_user: "postgres"
+db_password: "secret"
+
+auth_timeout_seconds: 120
+verification_code_length: 6

gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,6 @@
+#Sat Apr 18 12:45:08 CEST 2026
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.4.0-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

gradlew

@@ -0,0 +1,234 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/master/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
+
+APP_NAME="Gradle"
+APP_BASE_NAME=${0##*/}
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+# Collect all arguments for the java command;
+#   * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
+#     shell script including quotes and variable substitutions, so put them in
+#     double quotes to make sure that they get re-expanded; and
+#   * put everything else in single quotes, so that it's not re-expanded.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"

gradlew.bat

@@ -0,0 +1,89 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

plugin/build.gradle.kts

@@ -0,0 +1,20 @@
+import com.github.jengelman.gradle.plugins.shadow.tasks.ShadowJar
+
+plugins {
+    id("com.gradleup.shadow")
+}
+
+dependencies {
+    implementation(project(":common"))
+    implementation(project(":discord")) {
+        exclude(group = "ch.qos.logback")
+    }
+    compileOnly("com.velocitypowered:velocity-api:3.5.0-SNAPSHOT")
+    annotationProcessor("com.velocitypowered:velocity-api:3.5.0-SNAPSHOT")
+}
+
+
+tasks.named<ShadowJar>("shadowJar") {
+    archiveBaseName.set("loauth")
+    archiveClassifier.set("")
+}

plugin/src/main/java/dev/loki/loAuth/plugin/FoxAuth.java

@@ -0,0 +1,104 @@
+package dev.loki.loAuth.plugin;
+
+import dev.loki.loAuth.plugin.cfg.PluginCfg;
+import dev.loki.loAuth.plugin.listener.LoginListener;
+import dev.loki.loAuth.common.db.DatabaseManager;
+import dev.loki.loAuth.discord.Bot;
+import dev.loki.loAuth.discord.cfg.BotConfig;
+import com.velocitypowered.api.event.Subscribe;
+import com.velocitypowered.api.event.proxy.ProxyInitializeEvent;
+import com.velocitypowered.api.event.proxy.ProxyShutdownEvent;
+import com.velocitypowered.api.plugin.Plugin;
+import com.velocitypowered.api.plugin.annotation.DataDirectory;
+import com.velocitypowered.api.proxy.ProxyServer;
+import jakarta.inject.Inject;
+import org.slf4j.Logger;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.nio.file.Files;
+import java.nio.file.Path;
+
+@Plugin(id = "loauth", name = "loAuth", version = "0.0.1",
+        description = "Discord 2FA auth for Velocity", authors = {"loki"})
+public final class FoxAuth {
+
+    private final ProxyServer server;
+    private final Logger log;
+    private final Path dataDir;
+
+    private DatabaseManager db;
+    private Bot discordBot;
+
+    @Inject
+    public FoxAuth(final ProxyServer server, final Logger log, @DataDirectory final Path dataDir) {
+        this.server = server;
+        this.log = log;
+        this.dataDir = dataDir;
+    }
+
+    @Subscribe
+    public void onInit(final ProxyInitializeEvent event) {
+        PluginCfg cfg;
+        try {
+            cfg = new PluginCfg(getOrCreateConfig("config.yml"));
+        } catch (IOException e) {
+            log.error("Failed to load config: {}", e.getMessage());
+            return;
+        }
+
+        db = new DatabaseManager(cfg, "loAuthPlugin", 5);
+        server.getEventManager().register(this, new LoginListener(server, db, cfg, log));
+
+        if ("embedded".equals(cfg.getMode())) {
+            startEmbeddedBot(cfg);
+        } else {
+            log.info("Mode: standalone — external Discord bot required.");
+        }
+
+        log.info("loAuth initialized.");
+    }
+
+    private void startEmbeddedBot(final PluginCfg cfg) {
+        String token = cfg.getToken();
+        if (token.isEmpty()) {
+            log.warn("Mode is 'embedded' but token is empty! Discord bot not started.");
+            return;
+        }
+
+        try {
+            discordBot = new Bot(new BotConfig() {
+                @Override public String getDbType() { return cfg.getDbType(); }
+                @Override public String getToken() { return token; }
+                @Override public String getDbHost() { return cfg.getDbHost(); }
+                @Override public int getDbPort() { return cfg.getDbPort(); }
+                @Override public String getDbName() { return cfg.getDbName(); }
+                @Override public String getDbUser() { return cfg.getDbUser(); }
+                @Override public String getDbPassword() { return cfg.getDbPassword(); }
+                @Override public int getAuthTimeoutSeconds() { return cfg.getAuthTimeoutSeconds(); }
+                @Override public int getVerificationCodeLength() { return cfg.getVerificationCodeLength(); }
+            });
+            log.info("Discord bot started in embedded mode.");
+        } catch (Exception e) {
+            log.error("Failed to start embedded Discord bot: {}", e.getMessage());
+        }
+    }
+
+    @Subscribe
+    public void onShutdown(final ProxyShutdownEvent event) {
+        if (discordBot != null) discordBot.shutdown();
+        if (db != null) db.close();
+    }
+
+    private Path getOrCreateConfig(final String fileName) throws IOException {
+        Files.createDirectories(dataDir);
+        Path target = dataDir.resolve(fileName);
+        if (Files.notExists(target)) {
+            try (InputStream in = getClass().getResourceAsStream("/" + fileName)) {
+                if (in == null) throw new IOException("Resource not found: " + fileName);
+                Files.copy(in, target);
+            }
+        }
+        return target;
+    }
+}

plugin/src/main/java/dev/loki/loAuth/plugin/cfg/MessageConfig.java

@@ -0,0 +1,120 @@
+package dev.loki.loAuth.plugin.cfg;
+
+import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.TextComponent;
+import net.kyori.adventure.text.event.ClickEvent;
+import net.kyori.adventure.text.event.HoverEvent;
+import net.kyori.adventure.text.format.TextColor;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public final class MessageConfig {
+
+    private static final Pattern HEX_PATTERN = Pattern.compile("&#([0-9A-Fa-f]{6})");
+
+    private final Map<String, Object> raw;
+
+    @SuppressWarnings("unchecked")
+    public MessageConfig(final Map<String, Object> raw) {
+        this.raw = raw;
+    }
+
+    public Component header()                        { return text("first_login.header"); }
+    public Component returningHeader()                { return text("returning_login.header"); }
+    public Component returningBody()                  { return text("returning_login.body"); }
+    public Component returningTimeout()               { return text("returning_login.timeout"); }
+    public Component expiredHeader()                  { return text("expired.header"); }
+    public Component expiredBody()                    { return text("expired.body"); }
+    public Component success()                        { return text("success"); }
+
+    public Component code(final String code) {
+        return parse("first_login.code", Map.of("code", code))
+            .clickEvent(ClickEvent.copyToClipboard(code))
+            .hoverEvent(HoverEvent.showText(text("first_login.code_hover")));
+    }
+
+    public Component discordLink(final String link) {
+        String fullLink = link.startsWith("http") ? link : "https://" + link;
+        return parse("first_login.discord", Map.of("link", link))
+            .clickEvent(ClickEvent.openUrl(fullLink))
+            .hoverEvent(HoverEvent.showText(text("first_login.discord_hover")));
+    }
+
+    public Component expires(final int seconds) {
+        return text("first_login.expires", Map.of("time", String.valueOf(seconds)));
+    }
+
+    public Component react(final int seconds) {
+        return text("returning_login.react", Map.of("time", String.valueOf(seconds)));
+    }
+
+    // ─── Parser ───────────────────────────────────────────────────────────────
+
+    private Component text(final String path) {
+        return text(path, Map.of());
+    }
+
+    private Component text(final String path, final Map<String, String> placeholders) {
+        String rawStr = resolveRaw(path);
+        if (rawStr == null) return Component.text('[' + path + ']');
+        return parse(rawStr, placeholders);
+    }
+
+    private Component parse(final String rawStr, final Map<String, String> placeholders) {
+        String str = applyPlaceholders(rawStr, placeholders);
+
+        List<int[]> hexes = new ArrayList<>();
+        Matcher m = HEX_PATTERN.matcher(str);
+        while (m.find()) {
+            hexes.add(new int[]{m.start(), m.end(), Integer.parseInt(m.group(1), 16)});
+        }
+
+        TextComponent.Builder builder = Component.text();
+        int last = 0;
+
+        for (int i = 0; i < hexes.size(); i++) {
+            int[] h = hexes.get(i);
+            if (last < h[0]) {
+                builder.append(Component.text(str.substring(last, h[0])));
+            }
+            TextColor color = TextColor.color(h[2]);
+            int nextStart = (i + 1 < hexes.size()) ? hexes.get(i + 1)[0] : str.length();
+            builder.append(Component.text(str.substring(h[1], nextStart), color));
+            last = nextStart;
+        }
+
+        if (last < str.length()) {
+            builder.append(Component.text(str.substring(last)));
+        }
+
+        return builder.build();
+    }
+
+    @SuppressWarnings("unchecked")
+    private String resolveRaw(final String path) {
+        String[] parts = path.split("\\.");
+        Map<String, Object> current = raw;
+        for (int i = 0; i < parts.length - 1; i++) {
+            Object next = current.get(parts[i]);
+            if (next instanceof Map) {
+                current = (Map<String, Object>) next;
+            } else {
+                return null;
+            }
+        }
+        Object val = current.get(parts[parts.length - 1]);
+        return val instanceof String ? (String) val : null;
+    }
+
+    private static String applyPlaceholders(final String str, final Map<String, String> placeholders) {
+        String result = str;
+        for (Map.Entry<String, String> entry : placeholders.entrySet()) {
+            result = result.replace("{" + entry.getKey() + "}", entry.getValue());
+        }
+        return result;
+    }
+}

plugin/src/main/java/dev/loki/loAuth/plugin/cfg/PluginCfg.java

@@ -0,0 +1,40 @@
+package dev.loki.loAuth.plugin.cfg;
+
+import dev.loki.loAuth.common.cfg.DbConfig;
+import dev.loki.loAuth.common.cfg.YamlConfig;
+
+import java.io.IOException;
+import java.nio.file.Path;
+import java.util.Map;
+
+public final class PluginCfg implements DbConfig {
+
+    private final YamlConfig cfg;
+
+    public PluginCfg(final Path configPath) throws IOException {
+        cfg = new YamlConfig(configPath);
+    }
+
+    public String getMode()          { return cfg.getRequired("mode",   String.class); }
+    public String getToken()         { return cfg.get("token", ""); }
+    public String getDiscordLink()   { return cfg.get("discord_link", "discord.gg/ЗАМЕНИ_НА_СВОЙ"); }
+
+    @Override public String getDbType()                { return cfg.getRequired("db_type",               String.class); }
+    @Override public String getDbHost()                { return cfg.getRequired("db_host",               String.class); }
+    @Override public int    getDbPort()                { return cfg.getRequired("db_port",               Integer.class); }
+    @Override public String getDbName()                { return cfg.getRequired("db_name",               String.class); }
+    @Override public String getDbUser()                { return cfg.getRequired("db_user",               String.class); }
+    @Override public String getDbPassword()            { return cfg.getRequired("db_password",           String.class); }
+    @Override public int    getAuthTimeoutSeconds()    { return cfg.getRequired("auth_timeout_seconds",  Integer.class); }
+    @Override public int    getVerificationCodeLength(){ return cfg.getRequired("verification_code_length",Integer.class); }
+
+    public MessageConfig getMessages() {
+        Object msgs = cfg.get("messages", null);
+        if (msgs instanceof Map) {
+            @SuppressWarnings("unchecked")
+            Map<String, Object> map = (Map<String, Object>) msgs;
+            return new MessageConfig(map);
+        }
+        return new MessageConfig(Map.of());
+    }
+}

plugin/src/main/java/dev/loki/loAuth/plugin/listener/LoginListener.java

@@ -0,0 +1,134 @@
+package dev.loki.loAuth.plugin.listener;
+
+import dev.loki.loAuth.plugin.cfg.MessageConfig;
+import dev.loki.loAuth.plugin.cfg.PluginCfg;
+import dev.loki.loAuth.common.db.DatabaseManager;
+import dev.loki.loAuth.common.model.User;
+import com.velocitypowered.api.event.Subscribe;
+import com.velocitypowered.api.event.connection.LoginEvent;
+import com.velocitypowered.api.proxy.ProxyServer;
+import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.format.NamedTextColor;
+import org.slf4j.Logger;
+
+import java.util.Map;
+import java.util.Optional;
+import java.util.concurrent.*;
+
+public final class LoginListener {
+
+    private final ProxyServer server;
+    private final DatabaseManager db;
+    private final PluginCfg cfg;
+    private final Logger log;
+    private final MessageConfig msg;
+
+    private final Map<String, ScheduledFuture<?>> pendingKicks = new ConcurrentHashMap<>();
+    private final Map<String, String> pendingTokens = new ConcurrentHashMap<>();
+
+    private final ScheduledExecutorService scheduler = Executors.newScheduledThreadPool(2, r -> {
+        Thread t = new Thread(r, "foxauth-scheduler");
+        t.setDaemon(true);
+        return t;
+    });
+
+    public LoginListener(final ProxyServer server, final DatabaseManager db,
+                         final PluginCfg cfg, final Logger log) {
+        this.server = server;
+        this.db = db;
+        this.cfg = cfg;
+        this.log = log;
+        this.msg = cfg.getMessages();
+    }
+
+    @Subscribe
+    public void onLogin(final LoginEvent event) {
+        String nick = event.getPlayer().getUsername();
+
+        if (!db.isRegistered(nick)) {
+            handleFirstLogin(event, nick);
+        } else {
+            handleReturningLogin(event, nick);
+        }
+    }
+
+    private void handleFirstLogin(final LoginEvent event, final String nick) {
+        String code = db.createVerificationCode(nick);
+        int ttl = cfg.getAuthTimeoutSeconds();
+        String discordLink = cfg.getDiscordLink();
+
+        event.getPlayer().sendMessage(Component.text()
+                .append(msg.header()).appendNewline()
+                .append(msg.code(code)).appendNewline()
+                .append(msg.discordLink(discordLink)).appendNewline()
+                .append(msg.expires(ttl))
+                .build()
+        );
+
+        log.info("First login for {}, verification code issued.", nick);
+    }
+
+    private void handleReturningLogin(final LoginEvent event, final String nick) {
+        Optional<String> discordId = db.findByMinecraftNick(nick).map(User::discordId);
+        if (discordId.isEmpty()) {
+            event.getPlayer().sendMessage(Component.text("Ошибка авторизации. Обратись к администратору.", NamedTextColor.RED));
+            return;
+        }
+
+        String token = db.createLoginToken(nick, discordId.get());
+        pendingTokens.put(nick, token);
+        pollApproval(nick, token);
+
+        log.info("Returning login for {}, awaiting Discord approval.", nick);
+    }
+
+    private void pollApproval(final String nick, final String token) {
+        int ttl = cfg.getAuthTimeoutSeconds();
+
+        Component awaitMessage = Component.text()
+                .append(msg.returningHeader()).appendNewline()
+                .append(msg.returningBody()).appendNewline()
+                .append(msg.react(ttl)).appendNewline()
+                .append(msg.returningTimeout())
+                .build();
+
+        ScheduledFuture<?>[] pollRef = new ScheduledFuture<?>[1];
+        pollRef[0] = scheduler.scheduleAtFixedRate(() -> {
+            try {
+                if (db.isTokenConsumed(token)) {
+                    pollRef[0].cancel(false);
+                    cancelKick(nick);
+                    pendingTokens.remove(nick);
+                    server.getPlayer(nick).ifPresent(p ->
+                        p.sendMessage(msg.success())
+                    );
+                    log.info("Login approved for {}.", nick);
+                }
+            } catch (Exception e) {
+                log.error("Poll error for {}: {}", nick, e.getMessage());
+            }
+        }, 2, 2, TimeUnit.SECONDS);
+
+        ScheduledFuture<?> timeoutFuture = scheduler.schedule(() -> {
+            pollRef[0].cancel(false);
+            pendingTokens.remove(nick);
+            db.deleteLoginToken(token);
+            server.getPlayer(nick).ifPresent(p ->
+                p.sendMessage(Component.text()
+                    .append(msg.expiredHeader()).appendNewline()
+                    .append(msg.expiredBody())
+                    .build())
+            );
+            log.info("Login timeout for {}.", nick);
+        }, ttl, TimeUnit.SECONDS);
+
+        pendingKicks.put(nick, timeoutFuture);
+
+        server.getPlayer(nick).ifPresent(p -> p.sendMessage(awaitMessage));
+    }
+
+    private void cancelKick(final String nick) {
+        ScheduledFuture<?> f = pendingKicks.remove(nick);
+        if (f != null) f.cancel(false);
+    }
+}

plugin/src/main/resources/config.yml

@@ -0,0 +1,32 @@
+mode: "standalone"  # standalone | embedded
+token: ""
+
+db_type: "postgresql"  # postgresql | sqlite
+db_host: "localhost"
+db_port: 5432
+db_name: "mydb"
+db_user: "postgres"
+db_password: "secret"
+
+auth_timeout_seconds: 120
+verification_code_length: 6
+
+discord_link: "discord.gg/ЗАМЕНИ_НА_СВОЙ"
+
+messages:
+  first_login:
+    header: "&#FF4444Ты не зарегистрирован!"
+    code: "&#FFAA00Код: &#55FFFF{code}"
+    code_hover: "Нажми чтобы скопировать код"
+    discord: "&#AAAAAADiscord: &#FFFFFF{link}"
+    discord_hover: "Открыть Discord"
+    expires: "&#555555Код действителен {time} сек."
+  returning_login:
+    header: "&#FFAA00Подтверди вход в Discord!"
+    body: "&#AAAAAABот отправил тебе личное сообщение в Discord."
+    react: "&#AAAAAAПоставь &#57F287✅ &#AAAAAAчтобы войти."
+    timeout: "&#555555Таймаут: {time} сек."
+  expired:
+    header: "&#FF4444Время ожидания истекло."
+    body: "&#AAAAAAЗайди снова и подтверди вход в Discord."
+  success: "&#55FF55Авторизация успешна!"

settings.gradle.kts

@@ -0,0 +1,3 @@
+rootProject.name = "loAuth"
+
+include("common", "discord", "plugin")