content: /*
   * Copyright (C) 2011 The Android Open Source Project
   *
   * 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
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * 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 com.android.ex.chips;
  
  import android.Manifest;
  import android.content.Context;
  import android.content.pm.PackageManager;
  import android.os.Build;
  import android.os.Process;
  import androidx.annotation.Nullable;
  
  public class ChipsUtil {
  
      /**
       * Listener that gets notified when we check whether we have permission.
       */
      public interface PermissionsCheckListener {
          void onPermissionCheck(String permission, boolean granted);
      }
  
      /**
       * Permissions required by Chips library.
       */
      public static final String[] REQUIRED_PERMISSIONS =
              new String[] { Manifest.permission.READ_CONTACTS };
  
      /**
       * Returns true when the caller can use Chips UI in its environment.
       */
      public static boolean supportsChipsUi() {
          return Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH;
      }
  
      /**
       * Whether we are running on M or later version.
       *
       * <p>This is interesting for us because new permission model is introduced in M and we need to
       * check if we have {@link #REQUIRED_PERMISSIONS}.
       */
      public static boolean isRunningMOrLater() {
          return Build.VERSION.SDK_INT >= Build.VERSION_CODES.M;
      }
  
      /**
       * Returns {@link PackageManager#PERMISSION_GRANTED} if given permission is granted, or
       * {@link PackageManager#PERMISSION_DENIED} if not.
       */
      public static int checkPermission(Context context, String permission) {
          if (isRunningMOrLater()) {
              // TODO: Use "context.checkSelfPermission(permission)" once it's safe to move to M sdk
              return context.checkPermission(permission, Process.myPid(), Process.myUid());
          } else {
              // Assume that we have permission before M.
              return PackageManager.PERMISSION_GRANTED;
          }
      }
  
      /**
       * Returns true if all permissions in {@link #REQUIRED_PERMISSIONS} are granted.
       *
       * <p>If {@link PermissionsCheckListener} is specified it will be called for every
       * {@link #checkPermission} call.
       */
      public static boolean hasPermissions(Context context,
              @Nullable PermissionsCheckListener permissionsCheckListener) {
          for (String permission : REQUIRED_PERMISSIONS) {
              final boolean granted =
                      checkPermission(context, permission) == PackageManager.PERMISSION_GRANTED;
              if (permissionsCheckListener != null) {
                  permissionsCheckListener.onPermissionCheck(permission, granted);
              }
              if (!granted) {
                  return false;
              }
          }
          return true;
      }
  }
  