Server Log Events (#996)

* Server Log Event

* LogEventAppender Encoder

src/main/java/emu/grasscutter/server/event/internal/ServerLogEvent.java

@@ -0,0 +1,22 @@
+package emu.grasscutter.server.event.internal;
+
+import ch.qos.logback.classic.spi.ILoggingEvent;
+import ch.qos.logback.core.AppenderBase;
+import emu.grasscutter.server.event.types.ServerEvent;
+
+public class ServerLogEvent extends ServerEvent {
+    ILoggingEvent loggingEvent;
+    String consoleMessage;
+
+    public ServerLogEvent(Type type, ILoggingEvent loggingEvent, String consoleMessage) {
+        super(type);
+        this.loggingEvent = loggingEvent;
+        this.consoleMessage = consoleMessage;
+    }
+
+    public ILoggingEvent getLoggingEvent() { return loggingEvent; }
+
+    public String getConsoleMessage() {
+        return consoleMessage;
+    }
+}

src/main/java/emu/grasscutter/utils/ServerLogEventAppender.java

@@ -0,0 +1,31 @@
+package emu.grasscutter.utils;
+
+import ch.qos.logback.classic.spi.ILoggingEvent;
+import ch.qos.logback.core.AppenderBase;
+import ch.qos.logback.core.encoder.Encoder;
+import ch.qos.logback.core.spi.DeferredProcessingAware;
+import ch.qos.logback.core.status.ErrorStatus;
+import emu.grasscutter.server.event.internal.ServerLogEvent;
+import emu.grasscutter.server.event.types.ServerEvent;
+
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+
+public class ServerLogEventAppender<E> extends AppenderBase<E> {
+    protected Encoder<E> encoder;
+
+    @Override
+    protected void append(E event) {
+        byte[] byteArray = this.encoder.encode(event);
+        ServerLogEvent sle = new ServerLogEvent(ServerEvent.Type.GAME, (ILoggingEvent) event, new String(byteArray, StandardCharsets.UTF_8));
+        sle.call();
+    }
+
+    public Encoder<E> getEncoder() {
+        return encoder;
+    }
+
+    public void setEncoder(Encoder<E> encoder) {
+        this.encoder = encoder;
+    }
+}