实现API功能并编写日志过滤方法

Signed-off-by: Eicy <im@crash.work>

Service/BotPassiveMsgHandler.cs

@@ -0,0 +1,38 @@
+using Debugger;
+using Lagrange.Core.Common.Interface.Api;
+using Lagrange.Core.Event;
+using Lagrange.Core.Message;
+using Shrink.Config;
+
+namespace Shrink.Service;
+
+public class BotPassiveMsgHandler
+{
+    private static readonly Lazy<BotPassiveMsgHandler> _instance = new(() => new BotPassiveMsgHandler());
+    public static BotPassiveMsgHandler Instance => _instance.Value;
+    public EventInvoker Invoker { get; } = BotService.Instance.Client!.Invoker;
+
+    public Task Init()
+    {
+        Invoker.OnGroupMessageReceived += async (context, @event) =>
+        {
+            if (!@event.Chain.ToPreviewText().StartsWith("/switchlevel")) return;
+            var temp = @event.Chain.ToPreviewText()[("/switchlevel".Length + 1)..];
+            Configuration.Instance.Config = temp switch
+            {
+                "debug" => new Config.Config(LogLevel.Debug),
+                "info" => new Config.Config(LogLevel.Info),
+                "verbose" => new Config.Config(LogLevel.Verbose),
+                "warn" => new Config.Config(LogLevel.Warn),
+                "error" => new Config.Config(LogLevel.Error),
+                "fatal" => new Config.Config(LogLevel.Fatal),
+                _ => Configuration.Instance.Config
+            };
+            await Configuration.Instance.Save();
+            var chain = MessageBuilder.Group((uint)@event.Chain.GroupUin!)
+                .Text($"已将日志输出级别调整为{Configuration.Instance.Config.LogLevel}");
+            await context.SendMessage(chain.Build());
+        };
+        return Task.CompletedTask;
+    }
+}