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/*
* Copyright (C) 2015 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 org.kelar.inputmethod.latin.permissions;
import android.app.Activity;
import android.content.Context;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
/**
* Manager to perform permission related tasks. Always call on the UI thread.
*/
public class PermissionsManager {
public interface PermissionsResultCallback {
void onRequestPermissionsResult(boolean allGranted);
}
private int mRequestCodeId;
private final Context mContext;
private final Map<Integer, PermissionsResultCallback> mRequestIdToCallback = new HashMap<>();
private static PermissionsManager sInstance;
public PermissionsManager(Context context) {
mContext = context;
}
@Nonnull
public static synchronized PermissionsManager get(@Nonnull Context context) {
if (sInstance == null) {
sInstance = new PermissionsManager(context);
}
return sInstance;
}
private synchronized int getNextRequestId() {
return ++mRequestCodeId;
}
public synchronized void requestPermissions(@Nonnull PermissionsResultCallback callback,
@Nullable Activity activity,
String... permissionsToRequest) {
List<String> deniedPermissions = PermissionsUtil.getDeniedPermissions(
mContext, permissionsToRequest);
if (deniedPermissions.isEmpty()) {
return;
}
// otherwise request the permissions.
int requestId = getNextRequestId();
String[] permissionsArray = deniedPermissions.toArray(
new String[deniedPermissions.size()]);
mRequestIdToCallback.put(requestId, callback);
if (activity != null) {
PermissionsUtil.requestPermissions(activity, requestId, permissionsArray);
} else {
PermissionsActivity.run(mContext, requestId, permissionsArray);
}
}
public synchronized void onRequestPermissionsResult(
int requestCode, String[] permissions, int[] grantResults) {
PermissionsResultCallback permissionsResultCallback = mRequestIdToCallback.get(requestCode);
mRequestIdToCallback.remove(requestCode);
boolean allGranted = PermissionsUtil.allGranted(grantResults);
permissionsResultCallback.onRequestPermissionsResult(allGranted);
}
}
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