content: /*
   * Copyright (C) 2015 AChep@xda <artemchep@gmail.com>
   *
   * This program is free software; you can redistribute it and/or
   * modify it under the terms of the GNU General Public License
   * as published by the Free Software Foundation; either version 2
   * of the License, or (at your option) any later version.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
   * MA  02110-1301, USA.
   */
  package com.achep.base.permissions;
  
  import android.Manifest;
  import android.annotation.SuppressLint;
  import android.app.Activity;
  import android.content.Context;
  import android.content.pm.PackageManager;
  import android.provider.Settings;
  import androidx.annotation.NonNull;
  import androidx.annotation.Nullable;
  import androidx.core.content.ContextCompat;
  
  import com.achep.base.AppHeap;
  import com.achep.base.Device;
  import com.achep.base.content.CfgBase;
  import com.achep.base.notifications.NotificationSpace;
  
  import java.util.HashSet;
  import java.util.Map;
  import java.util.Set;
  
  /**
   * @author Artem Chepurnoy
   * @since 4.0.0
   */
  public class RuntimePermissions extends CfgBase {
  
      private static final String PREFERENCES_FILE_NAME = "__permissions";
  
      @Nullable
      private static RuntimePermissions sRuntimePermissions;
  
      /**
       * @return {@code true} if the app has this permission given,
       * {@code false} otherwise.
       * @see #allowed(Context, String)
       */
      @SuppressLint("NewApi")
      public static boolean has(@NonNull Context context, @NonNull String permission) {
          if (allowed(context, permission)) {
          } else return false;
  
          switch (permission) {
              case Manifest.permission.SYSTEM_ALERT_WINDOW:
                  return !Device.hasMarshmallowApi()
                          || Settings.canDrawOverlays(context);
              case Manifest.permission.WRITE_SETTINGS:
                  return !Device.hasMarshmallowApi()
                          || Settings.System.canWrite(context);
          }
  
          final int r = ContextCompat.checkSelfPermission(context, permission);
          return r == PackageManager.PERMISSION_GRANTED;
      }
  
      /**
       * @return {@code true} if the app may ask this permission,
       * {@code false} otherwise.
       * @see #has(Context, String)
       */
      public static boolean allowed(@NonNull Context context, @NonNull String permission) {
          return getInstance().contains(permission) && getInstance().getBoolean(permission);
      }
  
      public static void ask(@NonNull Context context, @NonNull String permission) {
          final boolean disturbing = context instanceof Activity;
          if (disturbing) {
          } else {
              NotificationSpace.getInstance().ensure(0);
          }
      }
  
      /**
       * @return a singlet object of the runtime permissions manager.
       */
      @NonNull
      public static synchronized RuntimePermissions getInstance() {
          if (sRuntimePermissions == null) {
              sRuntimePermissions = new RuntimePermissions();
          }
          return sRuntimePermissions;
      }
  
      //-- BEGIN ----------------------------------------------------------------
  
      /**
       * {@inheritDoc}
       */
      private RuntimePermissions() {
          super();
          NotificationSpace.getInstance().requestRange(100, 100);
      }
  
      /**
       * {@inheritDoc}
       */
      @NonNull
      @Override
      public String getPreferencesFileName() {
          return PREFERENCES_FILE_NAME;
      }
  
      /**
       * {@inheritDoc}
       */
      @Override
      protected void onConfigChanged(@NonNull Transaction transaction, @NonNull Option option) {
      }
  
      /**
       * {@inheritDoc}
       */
      @Override
      protected void onCreateMap(@NonNull Map<String, Option> map) {
          // Fulfil the set of permissions.
          Set<String> set = new HashSet<>();
          set.add(Manifest.permission.WRITE_EXTERNAL_STORAGE);
          AppHeap.getInstance().getConfiguration().getPermissions().onBuildPermissions(set);
          // Create a map
          for (String permission : set) {
              putOption(map, new CfgBase.Option(
                      boolean.class, permission, true,
                      0, 0, Integer.MAX_VALUE));
          }
      }
  }
  