Add BotConfiguration.autoReconnectOnForceOffline, close #835

mirai-core-api/src/commonMain/kotlin/event/events/bot.kt

@@ -60,7 +60,7 @@ public sealed class BotOfflineEvent : BotEvent, AbstractEvent() {
         public val title: String,
         public val message: String,
     ) : BotOfflineEvent(), Packet, BotPassiveEvent {
-        override var reconnect: Boolean = false
+        override var reconnect: Boolean = bot.configuration.autoReconnectOnForceOffline
     }
 
     /**

mirai-core-api/src/commonMain/kotlin/utils/BotConfiguration.kt

@@ -15,6 +15,7 @@ import kotlinx.coroutines.Job
 import kotlinx.coroutines.SupervisorJob
 import kotlinx.serialization.json.Json
 import net.mamoe.mirai.Bot
+import net.mamoe.mirai.event.events.BotOfflineEvent
 import java.io.File
 import kotlin.coroutines.CoroutineContext
 import kotlin.coroutines.EmptyCoroutineContext
@@ -95,6 +96,15 @@ public open class BotConfiguration { // open for Java
     /** 最多尝试多少次重连 */
     public var reconnectionRetryTimes: Int = Int.MAX_VALUE
 
+    /**
+     * 在被挤下线时 ([BotOfflineEvent.Force]) 自动重连. 默认为 `false`.
+     *
+     * 其他情况掉线都默认会自动重连, 详见 [BotOfflineEvent.reconnect]
+     *
+     * @since 2.1
+     */
+    public var autoReconnectOnForceOffline: Boolean = false
+
     /**
      * 验证码处理器
      *
@@ -129,6 +139,14 @@ public open class BotConfiguration { // open for Java
         }
     }.getOrElse { Json {} }
 
+    /**
+     * 设置 [autoReconnectOnForceOffline] 为 `true`, 即在被挤下线时自动重连.
+     * @since 2.1
+     */
+    public fun autoReconnectOnForceOffline() {
+        autoReconnectOnForceOffline = true
+    }
+
     /**
      * 使用随机设备信息.
      *