i-want-to-heal/android/app/src/main/java/com/warren/iwanttoheal/ControllerBridgeActivity.java

package com.warren.iwanttoheal;

import android.content.Intent;
import android.os.Bundle;
import android.os.SystemClock;
import android.view.KeyEvent;
import android.view.View;
import com.getcapacitor.BridgeActivity;
import java.io.File;

public abstract class ControllerBridgeActivity extends BridgeActivity {

    public static final String EXTRA_INITIAL_URL = "com.warren.iwanttoheal.INITIAL_URL";
    private static final long DPAD_THROTTLE_MS = 125;
    private long lastDpadDispatchAt = 0;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        clearWebViewServiceWorkers();
        super.onCreate(savedInstanceState);
        if (bridge != null) {
            bridge.getWebView().clearCache(true);
        }
        loadIntentUrl();
    }

    @Override
    protected void onNewIntent(Intent intent) {
        super.onNewIntent(intent);
        setIntent(intent);
        loadIntentUrl();
    }

    @Override
    public void onWindowFocusChanged(boolean hasFocus) {
        super.onWindowFocusChanged(hasFocus);
        if (hasFocus) enableImmersiveMode();
    }

    private void loadIntentUrl() {
        if (bridge == null || getIntent() == null) return;
        String initialUrl = getIntent().getStringExtra(EXTRA_INITIAL_URL);
        if (initialUrl == null || initialUrl.isEmpty()) return;
        bridge.getWebView().post(() -> bridge.getWebView().loadUrl(initialUrl));
    }

    private void enableImmersiveMode() {
        getWindow().getDecorView().setSystemUiVisibility(
            View.SYSTEM_UI_FLAG_FULLSCREEN
                | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
                | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY
                | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
                | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
                | View.SYSTEM_UI_FLAG_LAYOUT_STABLE
        );
    }

    private void clearWebViewServiceWorkers() {
        File webViewData = new File(getApplicationInfo().dataDir, "app_webview");
        deleteIfExists(new File(webViewData, "Default/Service Worker"));
        deleteIfExists(new File(webViewData, "Service Worker"));
    }

    private void deleteIfExists(File file) {
        if (!file.exists()) return;
        if (file.isDirectory()) {
            File[] children = file.listFiles();
            if (children != null) {
                for (File child : children) {
                    deleteIfExists(child);
                }
            }
        }
        file.delete();
    }

    @Override
    public boolean dispatchKeyEvent(KeyEvent event) {
        String token = controllerToken(event.getKeyCode());
        if (token == null || bridge == null) return super.dispatchKeyEvent(event);

        if (event.getAction() == KeyEvent.ACTION_DOWN) {
            boolean repeat = event.getRepeatCount() > 0;
            if (isDpadToken(token) && shouldThrottleDpad()) return true;
            String script =
                "window.dispatchEvent(new CustomEvent('ashen-halls-native-controller',"
                    + "{detail:{token:'" + token + "',repeat:" + repeat + "}}));";
            bridge.getWebView().post(
                () -> bridge.getWebView().evaluateJavascript(script, null)
            );
        }
        return true;
    }

    private boolean shouldThrottleDpad() {
        long now = SystemClock.uptimeMillis();
        if (now - lastDpadDispatchAt < DPAD_THROTTLE_MS) return true;
        lastDpadDispatchAt = now;
        return false;
    }

    private boolean isDpadToken(String token) {
        return token.equals("Button12")
            || token.equals("Button13")
            || token.equals("Button14")
            || token.equals("Button15");
    }

    private String controllerToken(int keyCode) {
        switch (keyCode) {
            case KeyEvent.KEYCODE_BUTTON_A:
            case KeyEvent.KEYCODE_ENTER:
                return "Button0";
            case KeyEvent.KEYCODE_BUTTON_B:
            case KeyEvent.KEYCODE_BACK:
                return "Button1";
            case KeyEvent.KEYCODE_BUTTON_X:
                return "Button2";
            case KeyEvent.KEYCODE_BUTTON_Y:
                return "Button3";
            case KeyEvent.KEYCODE_BUTTON_L1:
                return "Button4";
            case KeyEvent.KEYCODE_BUTTON_R1:
                return "Button5";
            case KeyEvent.KEYCODE_BUTTON_L2:
                return "Button6";
            case KeyEvent.KEYCODE_BUTTON_R2:
                return "Button7";
            case KeyEvent.KEYCODE_BUTTON_SELECT:
                return "Button8";
            case KeyEvent.KEYCODE_BUTTON_START:
                return "Button9";
            case KeyEvent.KEYCODE_BUTTON_THUMBL:
                return "Button10";
            case KeyEvent.KEYCODE_BUTTON_THUMBR:
                return "Button11";
            case KeyEvent.KEYCODE_DPAD_UP:
                return "Button12";
            case KeyEvent.KEYCODE_DPAD_DOWN:
                return "Button13";
            case KeyEvent.KEYCODE_DPAD_LEFT:
                return "Button14";
            case KeyEvent.KEYCODE_DPAD_RIGHT:
                return "Button15";
            default:
                return null;
        }
    }
}