release: 紧急更新 0.2.1 版本.

由于 Launcher 比 initialFiles 更早的执行, 调用 Const 导致更早的访问了未初始化的文件, 导致第一次启动会出现错误.
改动中将 Launcher 移入 main 方法不会有影响, 相比于在 AppPaths.<init> 中初始化会更安全.

build.gradle.kts

@@ -7,5 +7,5 @@ allprojects {
 
     }
     group = "net.lamgc"
-    version = "0.1.0"
+    version = "0.2.1"
 }

scalabot-app/build.gradle.kts

@@ -11,7 +11,7 @@ dependencies {
 
     implementation("org.slf4j:slf4j-api:1.7.36")
     implementation("io.github.microutils:kotlin-logging:2.1.21")
-    implementation("ch.qos.logback:logback-classic:1.2.10")
+    implementation("ch.qos.logback:logback-classic:1.2.11")
 
     val aetherVersion = "1.1.0"
     implementation("org.eclipse.aether:aether-api:$aetherVersion")
@@ -22,13 +22,14 @@ dependencies {
     implementation("org.eclipse.aether:aether-connector-basic:$aetherVersion")
     implementation("org.apache.maven:maven-aether-provider:3.3.9")
 
-    implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:1.6.0")
+    implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:1.6.1")
+    implementation("org.jetbrains.kotlin:kotlin-reflect:1.6.20")
     implementation("com.google.code.gson:gson:2.9.0")
 
     implementation("org.jdom:jdom2:2.0.6.1")
 
-    implementation("org.telegram:telegrambots-abilities:5.6.0")
-    implementation("org.telegram:telegrambots:5.6.0")
+    implementation("org.telegram:telegrambots-abilities:6.0.1")
+    implementation("org.telegram:telegrambots:6.0.1")
 
     implementation("io.prometheus:simpleclient:0.15.0")
     implementation("io.prometheus:simpleclient_httpserver:0.15.0")

scalabot-app/src/main/kotlin/AppConfigs.kt

@@ -32,7 +32,14 @@ internal data class BotAccount(
     val name: String,
     val token: String,
     val creatorId: Long = -1
-)
+) {
+
+    val id
+        // 不要想着每次获取都要从 token 里取出有性能损耗.
+        // 由于 Gson 解析方式, 如果不这么做, 会出现 token 设置前 id 初始化完成, 就只有"0"了,
+        // 虽然能过单元测试, 但实际使用过程是不能正常用的.
+        get() = token.substringBefore(":").toLong()
+}
 
 /**
  * 机器人配置.
@@ -127,11 +134,13 @@ internal data class MavenRepositoryConfig(
  * @property proxy Telegram API 代理配置.
  * @property metrics 运行指标数据配置. 可通过时序数据库记录运行数据.
  * @property mavenRepositories Maven 远端仓库配置.
+ * @property mavenLocalRepository Maven 本地仓库路径. 相对于运行目录 (而不是 DATA_ROOT 目录)
  */
 internal data class AppConfig(
     val proxy: ProxyConfig = ProxyConfig(),
     val metrics: MetricsConfig = MetricsConfig(),
-    val mavenRepositories: List<MavenRepositoryConfig> = emptyList()
+    val mavenRepositories: List<MavenRepositoryConfig> = emptyList(),
+    val mavenLocalRepository: String? = null
 )
 
 /**
@@ -152,7 +161,10 @@ internal enum class AppPaths(
      * 提示: 结尾不带 `/`.
      */
     DATA_ROOT(fileSupplier = {
-        File(System.getProperty(PathConst.PROP_DATA_PATH) ?: System.getenv(PathConst.ENV_DATA_PATH) ?: ".")
+        File(
+            System.getProperty(PathConst.PROP_DATA_PATH) ?: System.getenv(PathConst.ENV_DATA_PATH)
+            ?: System.getProperty("user.dir") ?: "."
+        )
     }, initializer = {
         val f = file
         if (!f.exists()) {
@@ -220,9 +232,9 @@ internal enum class AppPaths(
         return path
     }
 
-    private companion object PathConst {
-        private const val PROP_DATA_PATH = "bot.path.data"
-        private const val ENV_DATA_PATH = "BOT_DATA_PATH"
+    private object PathConst {
+        const val PROP_DATA_PATH = "bot.path.data"
+        const val ENV_DATA_PATH = "BOT_DATA_PATH"
     }
 
 }

scalabot-app/src/main/kotlin/AppMain.kt

@@ -4,6 +4,7 @@ import io.prometheus.client.exporter.HTTPServer
 import kotlinx.coroutines.runBlocking
 import mu.KotlinLogging
 import net.lamgc.scalabot.util.registerShutdownHook
+import org.eclipse.aether.repository.LocalRepository
 import org.telegram.telegrambots.bots.DefaultBotOptions
 import org.telegram.telegrambots.meta.TelegramBotsApi
 import org.telegram.telegrambots.meta.generics.BotSession
@@ -12,14 +13,14 @@ import kotlin.system.exitProcess
 
 private val log = KotlinLogging.logger { }
 
-private val launcher = Launcher()
-    .registerShutdownHook()
-
 fun main(args: Array<String>): Unit = runBlocking {
     log.info { "ScalaBot 正在启动中..." }
     log.info { "数据目录: ${AppPaths.DATA_ROOT}" }
     log.debug { "启动参数: ${args.joinToString(prefix = "[", postfix = "]")}" }
     initialFiles()
+
+    val launcher = Launcher()
+        .registerShutdownHook()
     if (Const.config.metrics.enable) {
         startMetricsServer()
     }
@@ -53,6 +54,16 @@ internal class Launcher : AutoCloseable {
 
     private val botApi = TelegramBotsApi(DefaultBotSession::class.java)
     private val botSessionMap = mutableMapOf<ScalaBot, BotSession>()
+    private val mavenLocalRepository =
+        if (Const.config.mavenLocalRepository != null && Const.config.mavenLocalRepository.isNotEmpty()) {
+            val repoPath = AppPaths.DATA_ROOT.file.toPath()
+                .resolve(Const.config.mavenLocalRepository)
+                .toRealPath()
+                .toFile()
+            LocalRepository(repoPath)
+        } else {
+            LocalRepository("${System.getProperty("user.home")}/.m2/repository")
+        }
 
     @Synchronized
     fun launch(): Boolean {
@@ -106,13 +117,14 @@ internal class Launcher : AutoCloseable {
             }.toList()
         val extensionPackageFinders = setOf(
             MavenRepositoryExtensionFinder(
+                localRepository = mavenLocalRepository,
                 remoteRepositories = remoteRepositories,
                 proxy = Const.config.proxy.toAetherProxy()
             )
         )
 
         val bot = ScalaBot(
-            BotDBMaker.getBotMaker(account),
+            BotDBMaker.getBotDbInstance(account),
             botOption,
             extensionPackageFinders,
             botConfig
@@ -138,9 +150,16 @@ internal class Launcher : AutoCloseable {
     @Synchronized
     override fun close() {
         botSessionMap.forEach {
-            log.info { "正在关闭机器人 `${it.key.botUsername}` ..." }
-            it.value.stop()
-            log.info { "已关闭机器人 `${it.key.botUsername}`." }
+            try {
+                if (!it.value.isRunning) {
+                    return@forEach
+                }
+                log.info { "正在关闭机器人 `${it.key.botUsername}` ..." }
+                it.value.stop()
+                log.info { "已关闭机器人 `${it.key.botUsername}`." }
+            } catch (e: Exception) {
+                log.error(e) { "机器人 `${it.key.botUsername}` 关闭时发生异常." }
+            }
         }
     }
 

scalabot-app/src/main/kotlin/BotDBMaker.kt

@@ -1,23 +1,190 @@
 package net.lamgc.scalabot
 
+import com.google.common.io.Files
+import mu.KotlinLogging
 import net.lamgc.scalabot.util.toHaxString
+import org.mapdb.DB
+import org.mapdb.DBException
 import org.mapdb.DBMaker
 import org.telegram.abilitybots.api.db.DBContext
 import org.telegram.abilitybots.api.db.MapDBContext
+import java.io.File
 import java.nio.charset.StandardCharsets
 import java.security.MessageDigest
 
+/**
+ * 数据库适配器.
+ *
+ * 应按照新到旧的顺序放置, 新的适配器应该在上面.
+ */
+private val adapters = arrayListOf<DbAdapter>(
+    BotAccountIdDbAdapter, // since [v0.2.0 ~ latest)
+    BotTokenDbAdapter // since [v0.0.1 ~ v0.2.0)
+)
+private const val FIELD_DB_VERSION = "::DB_VERSION"
+
 internal object BotDBMaker {
-    fun getBotMaker(botAccount: BotAccount): DBContext {
-        val digest: MessageDigest = MessageDigest.getInstance("SHA-256")
-        val digestBytes = digest.digest(botAccount.token.toByteArray(StandardCharsets.UTF_8))
-        val dbPath = AppPaths.DATA_DB.path + "${digestBytes.toHaxString()}.db"
-        val db = DBMaker.fileDB(dbPath)
+    private val logger = KotlinLogging.logger { }
+
+    fun getBotDbInstance(botAccount: BotAccount): DBContext {
+        for (adapter in adapters) {
+            val botDb = try {
+                adapter.getBotDb(botAccount, create = false) ?: continue
+            } catch (e: Exception) {
+                logger.error(e) { "适配器 ${adapter::class.java} 打开数据库时发生异常." }
+                continue
+            }
+            if (!adapter.dbVersionMatches(botDb)) {
+                logger.warn {
+                    "数据库版本号与适配器不符. " +
+                            "(Adapter: ${adapter::class.java};(${adapter.dbVersion})," +
+                            " DatabaseVer: ${adapter.getDbVersion(botDb)})"
+                }
+                botDb.close()
+                continue
+            } else {
+                if (adapter != adapters[0]) {
+                    logger.debug {
+                        "数据库适配器不是最新的, 正在升级数据库... " +
+                                "(Old: ${adapter::class.java}; New: ${adapters[0]::class.java})"
+                    }
+                    val db = try {
+                        botDb.close()
+                        val newDb = adapters[0].migrateDb(botAccount, adapter)
+                        logger.debug { "数据库版本升级完成." }
+                        newDb
+                    } catch (e: Exception) {
+                        logger.warn(e) { "Bot 数据库版本升级失败, 将继续使用旧版数据库." }
+                        adapter.getBotDb(botAccount, create = false) ?: continue
+                    }
+                    return MapDBContext(db)
+                }
+                return MapDBContext(botDb)
+            }
+        }
+
+        logger.debug { "没有适配器成功打开数据库, 使用最新的适配器创建数据库. (Adapter: ${adapters[0]::class.java})" }
+        val newDb = adapters[0].getBotDb(botAccount, create = true)
+            ?: throw IllegalStateException("No adapter is available to get the database.")
+        adapters[0].setDbVersion(newDb, adapters[0].dbVersion)
+        return MapDBContext(newDb)
+    }
+
+}
+
+/**
+ * 数据库适配器.
+ *
+ * 用于解决数据库格式更新带来的问题, 通过迁移机制, 将数据库从旧版本迁移到新版本, 或者只通过旧版本适配器访问而不迁移.
+ * @param dbVersion 数据库格式版本. 格式为: `{格式标识}_{最后使用的版本号}`, 如果为最新版适配器, 则不需要填写最后使用的版本号.
+ */
+private abstract class DbAdapter(val dbVersion: String) {
+
+    /**
+     * 获取 Bot 专有的 [DBContext].
+     * @param botAccount Bot 账号信息.
+     */
+    abstract fun getBotDb(botAccount: BotAccount, create: Boolean = false): DB?
+
+    /**
+     * 通过 Bot 账号信息获取数据库文件.
+     */
+    abstract fun getBotDbFile(botAccount: BotAccount): File
+
+    /**
+     * 将旧版数据库迁移到当前版本.
+     *
+     * 实现时请注意不要直接修改原数据库, 以防升级过程出错导致无法回退到旧版本.
+     */
+    abstract fun migrateDb(botAccount: BotAccount, oldDbAdapter: DbAdapter): DB
+
+    /**
+     * 数据库版本是否匹配.
+     */
+    open fun dbVersionMatches(db: DB): Boolean {
+        return getDbVersion(db) == dbVersion
+    }
+
+    fun getDbVersion(db: DB): String? {
+        if (!db.exists(FIELD_DB_VERSION)) {
+            return null
+        }
+        val dbVersionField = try {
+            db.atomicString(FIELD_DB_VERSION).open()
+        } catch (e: DBException.WrongConfiguration) {
+            return null
+        }
+        return dbVersionField.get()
+    }
+
+    fun setDbVersion(db: DB, version: String) {
+        db.atomicString(FIELD_DB_VERSION).createOrOpen().set(version)
+    }
+
+}
+
+/**
+ * 抽象文件数据库适配器.
+ *
+ * 只有文件有变化的适配器.
+ */
+private abstract class FileDbAdapter(
+    dbVersion: String,
+    private val fileProvider: (BotAccount) -> File
+) : DbAdapter(dbVersion) {
+
+    @Suppress("unused")
+    constructor(dbVersion: String) : this(dbVersion,
+        { throw NotImplementedError("When using this constructor, the \"getBotDbFile\" method must be implemented") })
+
+    override fun getBotDb(botAccount: BotAccount, create: Boolean): DB? {
+        val dbFile = getBotDbFile(botAccount)
+        if (!dbFile.exists() && !create) {
+            return null
+        }
+        return DBMaker.fileDB(dbFile)
             .closeOnJvmShutdownWeakReference()
             .checksumStoreEnable()
             .fileChannelEnable()
             .make()
-        return MapDBContext(db)
     }
 
-}
+    override fun getBotDbFile(botAccount: BotAccount): File = fileProvider(botAccount)
+
+    override fun migrateDb(botAccount: BotAccount, oldDbAdapter: DbAdapter): DB {
+        val oldFile = oldDbAdapter.getBotDbFile(botAccount)
+        val newFile = getBotDbFile(botAccount)
+        try {
+            @Suppress("UnstableApiUsage")
+            Files.copy(oldFile, newFile)
+        } catch (e: Exception) {
+            if (newFile.exists()) {
+                // 删除新文件以防止异常退出后直接读取新文件.
+                newFile.delete()
+            }
+            throw e
+        }
+        oldFile.delete()
+        return getBotDb(botAccount)!!.apply {
+            setDbVersion(this, this@FileDbAdapter.dbVersion)
+        }
+    }
+}
+
+/**
+ * 使用 Bot Token 中的 Account Id 命名数据库文件名.
+ */
+private object BotAccountIdDbAdapter : FileDbAdapter("BotAccountId", { botAccount ->
+    File(AppPaths.DATA_DB.file, "${botAccount.id}.db")
+})
+
+/**
+ * 使用 Bot Token, 经过 Sha256 加密后得到文件名.
+ *
+ * **已弃用**: 由于 Token 可以重新生成, 当 Token 改变后数据库文件名也会改变, 故弃用该方法.
+ */
+private object BotTokenDbAdapter : FileDbAdapter("BotToken_v0.1.0", { botAccount ->
+    val digest: MessageDigest = MessageDigest.getInstance("SHA-256")
+    val digestBytes = digest.digest(botAccount.token.toByteArray(StandardCharsets.UTF_8))
+    File(AppPaths.DATA_DB.file, "${digestBytes.toHaxString()}.db")
+})

scalabot-app/src/main/kotlin/ExtensionComponents.kt

@@ -90,6 +90,10 @@ internal class ExtensionLoader(
             try {
                 val extension =
                     factory.createExtensionInstance(bot, getExtensionDataFolder(extensionArtifact))
+                if (extension == null) {
+                    log.debug { "Factory ${factory::class.java} 创建插件时返回了 null, 已跳过. (BotName: ${bot.botUsername})" }
+                    continue
+                }
                 factories.add(LoadedExtensionEntry(extensionArtifact, factory::class.java, extension))
             } catch (e: Exception) {
                 log.error(e) { "创建扩展时发生异常. (ExtArtifact: `$extensionArtifact`, Factory: ${factory::class.java.name})" }

scalabot-app/src/main/kotlin/ScalaBot.kt

@@ -30,6 +30,7 @@ internal class ScalaBot(
     extensionFinders: Set<ExtensionPackageFinder>,
     botConfig: BotConfig,
     private val creatorId: Long = botConfig.account.creatorId,
+    val accountId: Long = botConfig.account.id,
     val extensions: Set<Artifact> = botConfig.extensions
 ) :
     AbilityBot(

scalabot-app/src/main/kotlin/util/Utils.kt

@@ -34,11 +34,7 @@ internal fun File.deepListFiles(
         this.listFiles(filenameFilter)
     } else {
         this.listFiles()
-    }
-
-    if (files == null) {
-        return null
-    }
+    } ?: return null
 
     val result = if (addSelf) mutableSetOf(this) else mutableSetOf()
     for (file in files) {
@@ -48,10 +44,8 @@ internal fun File.deepListFiles(
             if (!onlyFile) {
                 result.add(file)
             }
-            val subFiles = file.deepListFiles(false, onlyFile, fileFilter, filenameFilter)
-            if (subFiles != null) {
-                result.addAll(subFiles)
-            }
+            val subFiles = file.deepListFiles(false, onlyFile, fileFilter, filenameFilter) ?: continue
+            result.addAll(subFiles)
         }
     }
     return result.toTypedArray()

scalabot-app/src/main/resources/logback-test.xml

@@ -5,6 +5,8 @@
     <logger name="org.eclipse.aether.internal.impl.DefaultTransporterProvider" level="INFO"/>
     <logger name="org.eclipse.aether.internal.impl.DefaultRepositoryConnectorProvider" level="INFO"/>
     <logger name="org.eclipse.aether.internal.impl.EnhancedLocalRepositoryManager" level="INFO"/>
+    <logger name="org.telegram.telegrambots.facilities.proxysocketfactorys" level="INFO"/>
+    <logger name="org.eclipse.aether.internal.impl.DefaultUpdateCheckManager" level="INFO"/>
 
     <root level="DEBUG">
         <appender-ref ref="FILE_OUT"/>

scalabot-app/src/test/kotlin/AppConfigTest.kt

@@ -0,0 +1,31 @@
+package net.lamgc.scalabot
+
+import com.google.gson.Gson
+import java.util.*
+import kotlin.math.abs
+import kotlin.test.Test
+import kotlin.test.assertEquals
+
+class BotAccountTest {
+
+    @Test
+    fun deserializerTest() {
+        val accountId = abs(Random().nextInt()).toLong()
+        val creatorId = abs(Random().nextInt()).toLong()
+        val botAccount = Gson().fromJson(
+            """
+            {
+                "name": "TestBot",
+                "token": "${accountId}:AAHErDroUTznQsOd_oZPJ6cQEj4Z5mGHO10",
+                "creatorId": $creatorId
+            }
+        """.trimIndent(), BotAccount::class.java
+        )
+        assertEquals("TestBot", botAccount.name)
+        assertEquals("${accountId}:AAHErDroUTznQsOd_oZPJ6cQEj4Z5mGHO10", botAccount.token)
+        assertEquals(accountId, botAccount.id, "Botaccount ID does not match expectations.")
+        assertEquals(creatorId, botAccount.creatorId)
+    }
+
+}
+

scalabot-ext-example/src/main/java/net/lamgc/scalabot/simple/SayHelloExtension.java

@@ -37,11 +37,16 @@ public class SayHelloExtension implements AbilityExtension {
      */
     public Ability test() {
         ReplyFlow botHello = ReplyFlow.builder(bot.db())
+                .enableStats("say_hello")
                 .action((bot, upd) -> bot.silent().send("What is u name?", upd.getMessage().getChatId()))
-                .onlyIf(update -> "hello".equalsIgnoreCase(update.getMessage().getText()))
+                .onlyIf(update -> update.hasMessage()
+                        && update.getMessage().hasText()
+                        && "hello".equalsIgnoreCase(update.getMessage().getText()))
                 .next(Reply.of((bot, upd) -> bot.silent()
                                 .send("OK! You name is " + upd.getMessage().getText().substring("my name is ".length()), upd.getMessage().getChatId()),
-                        upd -> upd.getMessage().getText().startsWith("my name is ")))
+                        upd -> upd.hasMessage()
+                                && upd.getMessage().hasText()
+                                && upd.getMessage().getText().startsWith("my name is ")))
                 .build();
 
         return Ability.builder()

scalabot-extension/build.gradle.kts

@@ -7,11 +7,12 @@ plugins {
 }
 
 dependencies {
-    api("org.telegram:telegrambots-abilities:5.6.0")
+    api("org.telegram:telegrambots-abilities:6.0.1")
     api("org.slf4j:slf4j-api:1.7.36")
 
-    // There is nothing to test.
-    // testImplementation(kotlin("test"))
+    testImplementation("org.junit.jupiter:junit-jupiter-api:5.8.2")
+    testImplementation("org.mockito:mockito-core:4.4.0")
+    testRuntimeOnly("org.junit.jupiter:junit-jupiter-engine")
 }
 
 tasks.withType<Javadoc> {
@@ -23,6 +24,8 @@ tasks.withType<Javadoc> {
 java {
     withJavadocJar()
     withSourcesJar()
+    sourceCompatibility = JavaVersion.VERSION_11
+    targetCompatibility = JavaVersion.VERSION_11
 }
 
 tasks.test {

scalabot-extension/src/main/java/net/lamgc/scalabot/extension/BotExtensionFactory.java

@@ -13,6 +13,7 @@ import java.io.File;
  * 所以将通过该接口工厂来创建扩展对象.
  *
  * @author LamGC
+ * @since 0.0.1
  */
 public interface BotExtensionFactory {
 
@@ -21,11 +22,15 @@ public interface BotExtensionFactory {
      *
      * <p> 如扩展无使用 {@link org.telegram.abilitybots.api.db.DBContext} 的话,
      * 也可以返回扩展单例, 因为 AbilityBot 本身并不禁止多个机器人共用一个扩展对象
-     * (因为 AbilityBot 只是调用了扩展中的方法来创建了功能对象).
+     * (AbilityBot 只是调用了扩展中的方法来创建 Ability 对象).
      *
      * @param bot             机器人对象.
-     * @param shareDataFolder ScalaBot App 为扩展提供的数据目录, 建议存储在数据目录中, 便于数据的存储管理.
-     * @return 返回为该 Bot 对象创建的扩展对象.
+     * @param shareDataFolder ScalaBot App 为扩展提供的共享数据目录.
+     *                        <p>路径格式为:
+     *                        <pre> $DATA_ROOT/data/extensions/{GroupId}/{ArtifactId}</pre>
+     *                        <b>同一个扩展包的 Factory</b> 接收到的共享数据目录<b>都是一样的</b>,
+     *                        建议将数据存储在数据目录中, 便于数据的存储管理.
+     * @return 返回为该 Bot 对象创建的扩展对象, 如果不希望为该机器人提供扩展, 可返回 {@code null}.
      */
     AbilityExtension createExtensionInstance(BaseAbilityBot bot, File shareDataFolder);
 

scalabot-extension/src/main/java/net/lamgc/scalabot/extension/ScalaBotExtension.java

@@ -1,32 +0,0 @@
-package net.lamgc.scalabot.extension;
-
-import org.telegram.abilitybots.api.bot.BaseAbilityBot;
-import org.telegram.abilitybots.api.db.DBContext;
-import org.telegram.abilitybots.api.sender.MessageSender;
-import org.telegram.abilitybots.api.util.AbilityExtension;
-
-/**
- *
- */
-public abstract class ScalaBotExtension implements AbilityExtension {
-
-    /**
-     * 扩展所属的机器人对象.
-     *
-     * <p> 不要给该属性添加 Getter, 会被当成 Ability 添加, 导致出现异常.
-     */
-    protected final BaseAbilityBot bot;
-
-    public ScalaBotExtension(BaseAbilityBot bot) {
-        this.bot = bot;
-    }
-
-    protected MessageSender getSender() {
-        return bot.sender();
-    }
-
-    protected DBContext getDBContext() {
-        return bot.db();
-    }
-
-}

scalabot-extension/src/main/java/net/lamgc/scalabot/extension/util/AbilityBots.java

@@ -0,0 +1,52 @@
+package net.lamgc.scalabot.extension.util;
+
+import org.telegram.abilitybots.api.bot.BaseAbilityBot;
+
+import java.util.Map;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public class AbilityBots {
+
+    private final static Pattern botTokenPattern = Pattern.compile("([1-9]\\d+):([A-Za-z\\d_-]{35,})");
+
+    private AbilityBots() {
+    }
+
+    /**
+     * 获取 AbilityBot 的账户 Id.
+     *
+     * <p> 账户 Id 来自于 botToken 中, token 的格式为 "[AccountId]:[Secret]".
+     * <p> 账户 Id 的真实性与 botToken 的有效性有关, 本方法并不会确保 botToken 的有效性, 一般情况下也无需考虑 Id 的有效性,
+     * 如果有需要, 可尝试通过调用 {@link org.telegram.telegrambots.meta.api.methods.GetMe} 来确保 botToken 的有效性.
+     *
+     * @param bot 要获取账户 Id 的 AbilityBot 对象.
+     * @return 返回 AbilityBot 的账户 Id.
+     * @throws IllegalArgumentException 当 AbilityBot 的 botToken 格式错误时抛出该异常.
+     */
+    public static long getBotAccountId(BaseAbilityBot bot) {
+        String botToken = bot.getBotToken();
+        Matcher matcher = botTokenPattern.matcher(botToken);
+        if (!matcher.matches()) {
+            throw new IllegalArgumentException("Invalid token format.");
+        }
+        return Long.parseLong(matcher.group(1));
+    }
+
+    /**
+     * 取消某一对话的状态机.
+     *
+     * @param bot    AbilityBot 实例.
+     * @param chatId 要删除状态机的聊天 Id.
+     * @return 如果状态机存在, 则删除后返回 true, 不存在(未开启任何状态机, 即没有触发任何 Reply)则返回 false.
+     */
+    public static boolean cancelReplyState(BaseAbilityBot bot, long chatId) {
+        Map<Long, Integer> stateMap = bot.db().getMap("user_state_replies");
+        if (!stateMap.containsKey(chatId)) {
+            return false;
+        }
+        stateMap.remove(chatId);
+        return true;
+    }
+
+}

scalabot-extension/src/test/java/net/lamgc/scalabot/extension/util/AbilityBotsTest.java

@@ -0,0 +1,121 @@
+package net.lamgc.scalabot.extension.util;
+
+import org.junit.jupiter.api.Test;
+import org.mapdb.DBMaker;
+import org.telegram.abilitybots.api.bot.AbilityBot;
+import org.telegram.abilitybots.api.bot.BaseAbilityBot;
+import org.telegram.abilitybots.api.db.MapDBContext;
+import org.telegram.abilitybots.api.objects.*;
+import org.telegram.abilitybots.api.sender.SilentSender;
+import org.telegram.telegrambots.meta.api.objects.Message;
+import org.telegram.telegrambots.meta.api.objects.Update;
+import org.telegram.telegrambots.meta.api.objects.User;
+
+import static org.junit.jupiter.api.Assertions.*;
+import static org.mockito.Mockito.*;
+
+public class AbilityBotsTest {
+
+    public static final User USER = new User(1L, "first", false, "last", "username", null, false, false, false);
+    public static final User CREATOR = new User(1337L, "creatorFirst", false, "creatorLast", "creatorUsername", null, false, false, false);
+
+    static Update mockFullUpdate(BaseAbilityBot bot, User user, String args) {
+        bot.users().put(USER.getId(), USER);
+        bot.users().put(CREATOR.getId(), CREATOR);
+        bot.userIds().put(CREATOR.getUserName(), CREATOR.getId());
+        bot.userIds().put(USER.getUserName(), USER.getId());
+
+        bot.admins().add(CREATOR.getId());
+
+        Update update = mock(Update.class);
+        when(update.hasMessage()).thenReturn(true);
+        Message message = mock(Message.class);
+        when(message.getFrom()).thenReturn(user);
+        when(message.getText()).thenReturn(args);
+        when(message.hasText()).thenReturn(true);
+        when(message.isUserMessage()).thenReturn(true);
+        when(message.getChatId()).thenReturn(user.getId());
+        when(update.getMessage()).thenReturn(message);
+        return update;
+    }
+
+    @Test
+    void getBotAccountIdTest() {
+        String expectToken = "1234567890:AAHXcNDBRZTKfyPED5Gi3PZDIKPOM6xhxwo";
+        long actual = AbilityBots.getBotAccountId(new TestingAbilityBot(expectToken, "test"));
+        assertEquals(1234567890, actual);
+
+        String badTokenA = "12c34d56a7890:AAHXcNDBRZTKfyPED5Gi3PZDIKPOM6xhxwo";
+        assertThrows(IllegalArgumentException.class, () ->
+                AbilityBots.getBotAccountId(new TestingAbilityBot(badTokenA, "test")));
+
+        String badTokenB = "12c34d56a7890AAHXcNDBRZTKfyPED5Gi3PZDIKPOM6xhxwo";
+        assertThrows(IllegalArgumentException.class, () ->
+                AbilityBots.getBotAccountId(new TestingAbilityBot(badTokenB, "test")));
+    }
+
+    @Test
+    void cancelReplyStateTest() {
+        User userA = new User(10001L, "first", false, "last", "username", null, false, false, false);
+        User userB = new User(10101L, "first", false, "last", "username", null, false, false, false);
+        SilentSender silent = mock(SilentSender.class);
+        BaseAbilityBot bot = new TestingAbilityBot("", "", silent);
+        bot.onRegister();
+        bot.onUpdateReceived(mockFullUpdate(bot, userA, "/set_reply"));
+        verify(silent, times(1)).send("Reply set!", userA.getId());
+        bot.onUpdateReceived(mockFullUpdate(bot, userA, "reply_01"));
+        verify(silent, times(1)).send("Reply 01", userA.getId());
+        assertTrue(AbilityBots.cancelReplyState(bot, userA.getId()));
+        bot.onUpdateReceived(mockFullUpdate(bot, userA, "reply_02"));
+        verify(silent, never()).send("Reply 02", userA.getId());
+
+        assertFalse(AbilityBots.cancelReplyState(bot, userB.getId()));
+
+        silent = mock(SilentSender.class);
+        bot = new TestingAbilityBot("", "", silent);
+        bot.onRegister();
+
+        bot.onUpdateReceived(mockFullUpdate(bot, userA, "/set_reply"));
+        verify(silent, times(1)).send("Reply set!", userA.getId());
+        bot.onUpdateReceived(mockFullUpdate(bot, userA, "reply_01"));
+        verify(silent, times(1)).send("Reply 01", userA.getId());
+        bot.onUpdateReceived(mockFullUpdate(bot, userA, "reply_02"));
+        verify(silent, times(1)).send("Reply 02", userA.getId());
+    }
+
+    public static class TestingAbilityBot extends AbilityBot {
+
+        public TestingAbilityBot(String botToken, String botUsername) {
+            super(botToken, botUsername, new MapDBContext(DBMaker.heapDB().make()));
+        }
+
+        public TestingAbilityBot(String botToken, String botUsername, SilentSender silentSender) {
+            super(botToken, botUsername, new MapDBContext(DBMaker.heapDB().make()));
+            this.silent = silentSender;
+        }
+
+        public Ability setReply() {
+            return Ability.builder()
+                    .name("set_reply")
+                    .enableStats()
+                    .locality(Locality.ALL)
+                    .privacy(Privacy.PUBLIC)
+                    .action(ctx -> ctx.bot().silent().send("Reply set!", ctx.chatId()))
+                    .reply(ReplyFlow.builder(db())
+                            .action((bot, upd) -> bot.silent().send("Reply 01", upd.getMessage().getChatId()))
+                            .onlyIf(upd -> upd.hasMessage() && upd.getMessage().getText().equals("reply_01"))
+                            .next(Reply.of((bot, upd) ->
+                                            bot.silent().send("Reply 02", upd.getMessage().getChatId()),
+                                    upd -> upd.hasMessage() && upd.getMessage().getText().equals("reply_02")))
+                            .build()
+                    )
+                    .build();
+        }
+
+        @Override
+        public long creatorId() {
+            return 0;
+        }
+    }
+
+}