packages/webview_flutter/android/src/main/java/io/flutter/plugins/webviewflutter/FlutterCookieManager.java

// Copyright 2019 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

package io.flutter.plugins.webviewflutter;

import android.os.Build;
import android.os.Build.VERSION_CODES;
import android.webkit.CookieManager;
import android.webkit.ValueCallback;
import io.flutter.plugin.common.BinaryMessenger;
import io.flutter.plugin.common.MethodCall;
import io.flutter.plugin.common.MethodChannel;
import io.flutter.plugin.common.MethodChannel.MethodCallHandler;
import io.flutter.plugin.common.MethodChannel.Result;

class FlutterCookieManager implements MethodCallHandler {

  private FlutterCookieManager() {
    // Do not instantiate.
    // This class should only be used in context of a BinaryMessenger.
    // Use FlutterCookieManager#registerWith instead.
  }

  static void registerWith(BinaryMessenger messenger) {
    MethodChannel methodChannel = new MethodChannel(messenger, "plugins.flutter.io/cookie_manager");
    FlutterCookieManager cookieManager = new FlutterCookieManager();
    methodChannel.setMethodCallHandler(cookieManager);
  }

  @Override
  public void onMethodCall(MethodCall methodCall, Result result) {
    switch (methodCall.method) {
      case "clearCookies":
        clearCookies(result);
        break;
      default:
        result.notImplemented();
    }
  }

  private static void clearCookies(final Result result) {
    CookieManager cookieManager = CookieManager.getInstance();
    final boolean hasCookies = cookieManager.hasCookies();
    if (Build.VERSION.SDK_INT >= VERSION_CODES.LOLLIPOP) {
      cookieManager.removeAllCookies(
          new ValueCallback<Boolean>() {
            @Override
            public void onReceiveValue(Boolean value) {
              result.success(hasCookies);
            }
          });
    } else {
      cookieManager.removeAllCookie();
      result.success(hasCookies);
    }
  }
}