Add path preview to simplepathing

src/main/java/com/replaymod/simplepathing/preview/PathPreview.java

@@ -0,0 +1,58 @@
+package com.replaymod.simplepathing.preview;
+
+import com.replaymod.core.events.SettingsChangedEvent;
+import com.replaymod.replay.ReplayHandler;
+import com.replaymod.replay.events.ReplayCloseEvent;
+import com.replaymod.replay.events.ReplayOpenEvent;
+import com.replaymod.simplepathing.ReplayModSimplePathing;
+import com.replaymod.simplepathing.Setting;
+import net.minecraftforge.fml.common.FMLCommonHandler;
+import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;
+
+public class PathPreview {
+    private final ReplayModSimplePathing mod;
+
+    private ReplayHandler replayHandler;
+    private PathPreviewRenderer renderer;
+
+    public PathPreview(ReplayModSimplePathing mod) {
+        this.mod = mod;
+    }
+
+    public void register() {
+        FMLCommonHandler.instance().bus().register(this);
+    }
+
+    @SubscribeEvent
+    public void onReplayOpen(ReplayOpenEvent.Post event) {
+        replayHandler = event.getReplayHandler();
+        update();
+    }
+
+    @SubscribeEvent
+    public void onReplayClose(ReplayCloseEvent.Pre event) {
+        replayHandler = null;
+        update();
+    }
+
+    @SubscribeEvent
+    public void onSettingsChanged(SettingsChangedEvent event) {
+        if (event.getKey() == Setting.PATH_PREVIEW) {
+            update();
+        }
+    }
+
+    private void update() {
+        if (mod.getCore().getSettingsRegistry().get(Setting.PATH_PREVIEW) && replayHandler != null) {
+            if (renderer == null) {
+                renderer = new PathPreviewRenderer(mod, replayHandler);
+                renderer.register();
+            }
+        } else {
+            if (renderer != null) {
+                renderer.unregister();
+                renderer = null;
+            }
+        }
+    }
+}