1 files changed, 91 insertions, 0 deletions
diff --git a/java/src/com/android/inputmethod/latin/permissions/PermissionsManager.java b/java/src/com/android/inputmethod/latin/permissions/PermissionsManager.java
new file mode 100644
index 000000000..08c623ab5
--- /dev/null
+++ b/java/src/com/android/inputmethod/latin/permissions/PermissionsManager.java
@@ -0,0 +1,91 @@
+/*
+ * 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 com.android.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);
+    }
+}