content: /**
   * Copyright 2017 JessYan
   * <p>
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   * <p>
   * http://www.apache.org/licenses/LICENSE-2.0
   * <p>
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package <%= appPackage %>.utils;
  
  import android.Manifest;
  
  import com.tbruyelle.rxpermissions2.Permission;
  import com.tbruyelle.rxpermissions2.RxPermissions;
  
  import java.util.ArrayList;
  import java.util.Arrays;
  import java.util.List;
  
  import io.reactivex.annotations.NonNull;
  import me.jessyan.rxerrorhandler.core.RxErrorHandler;
  import me.jessyan.rxerrorhandler.handler.ErrorHandleSubscriber;
  import timber.log.Timber;
  
  /**
   * ================================================
   * 权限请求工具类
   *
   * @see <a href="https://github.com/JessYanCoding/MVPArms/wiki#3.9">PermissionUtil wiki 官方文档</a>
   * Created by JessYan on 17/10/2016 10:09
   * <a href="mailto:jess.yan.effort@gmail.com">Contact me</a>
   * <a href="https://github.com/JessYanCoding">Follow me</a>
   * ================================================
   */
  public class PermissionUtil {
      public static final String TAG = "Permission";
  
  
      private PermissionUtil() {
          throw new IllegalStateException("you can't instantiate me!");
      }
  
      public interface RequestPermission {
          /**
           * 权限请求成功
           */
          void onRequestPermissionSuccess();
  
          /**
           * 用户拒绝了权限请求, 权限请求失败, 但还可以继续请求该权限
           *
           * @param permissions 请求失败的权限名
           */
          void onRequestPermissionFailure(List<String> permissions);
  
          /**
           * 用户拒绝了权限请求并且用户选择了以后不再询问, 权限请求失败, 这时将不能继续请求该权限, 需要提示用户进入设置页面打开该权限
           *
           * @param permissions 请求失败的权限名
           */
          void onRequestPermissionFailureWithAskNeverAgain(List<String> permissions);
      }
  
  
      public static void requestPermission(final RequestPermission requestPermission, RxPermissions rxPermissions, RxErrorHandler errorHandler, String... permissions) {
          if (permissions == null || permissions.length == 0) return;
  
          List<String> needRequest = new ArrayList<>();
          for (String permission : permissions) { //过滤调已经申请过的权限
              if (!rxPermissions.isGranted(permission)) {
                  needRequest.add(permission);
              }
          }
  
          if (needRequest.isEmpty()) {//全部权限都已经申请过，直接执行操作
              requestPermission.onRequestPermissionSuccess();
          } else {//没有申请过,则开始申请
              rxPermissions
                      .requestEach(needRequest.toArray(new String[needRequest.size()]))
                      .buffer(permissions.length)
                      .subscribe(new ErrorHandleSubscriber<List<Permission>>(errorHandler) {
                          @Override
                          public void onNext(@NonNull List<Permission> permissions) {
                              for (Permission p : permissions) {
                                  if (!p.granted) {
                                      if (p.shouldShowRequestPermissionRationale) {
                                          Timber.tag(TAG).d("Request permissions failure");
                                          requestPermission.onRequestPermissionFailure(Arrays.asList(p.name));
                                          return;
                                      } else {
                                          Timber.tag(TAG).d("Request permissions failure with ask never again");
                                          requestPermission.onRequestPermissionFailureWithAskNeverAgain(Arrays.asList(p.name));
                                          return;
                                      }
                                  }
                              }
                              Timber.tag(TAG).d("Request permissions success");
                              requestPermission.onRequestPermissionSuccess();
                          }
                      });
          }
  
      }
  
  
      /**
       * 请求摄像头权限
       */
      public static void launchCamera(RequestPermission requestPermission, RxPermissions rxPermissions, RxErrorHandler errorHandler) {
          requestPermission(requestPermission, rxPermissions, errorHandler, Manifest.permission.WRITE_EXTERNAL_STORAGE, Manifest.permission.CAMERA);
      }
  
  
      /**
       * 请求外部存储的权限
       */
      public static void externalStorage(RequestPermission requestPermission, RxPermissions rxPermissions, RxErrorHandler errorHandler) {
          requestPermission(requestPermission, rxPermissions, errorHandler, Manifest.permission.WRITE_EXTERNAL_STORAGE);
      }
  
  
      /**
       * 请求发送短信权限
       */
      public static void sendSms(RequestPermission requestPermission, RxPermissions rxPermissions, RxErrorHandler errorHandler) {
          requestPermission(requestPermission, rxPermissions, errorHandler, Manifest.permission.SEND_SMS);
      }
  
  
      /**
       * 请求打电话权限
       */
      public static void callPhone(RequestPermission requestPermission, RxPermissions rxPermissions, RxErrorHandler errorHandler) {
          requestPermission(requestPermission, rxPermissions, errorHandler, Manifest.permission.CALL_PHONE);
      }
  
  
      /**
       * 请求获取手机状态的权限
       */
      public static void readPhonestate(RequestPermission requestPermission, RxPermissions rxPermissions, RxErrorHandler errorHandler) {
          requestPermission(requestPermission, rxPermissions, errorHandler, Manifest.permission.READ_PHONE_STATE);
      }
  
  }
  
  