Implemented blocked numbers migration

+ After upgrading to N, users need to be able to migrate their
blocked number list from the Dialer solution to the framework
solution. Prior to migrating, when a user attempts to block a number,
a Dialog is shown prompting them to migrate their numbers. Users
must migrate to continue adding numbers to their block list. Users
that decide not to migrate will still have calls and voicemails
blocked for numbers that are currently on their block list.
+ This CL implements the logic which copies users' blocked numbers
lists to the framework solution.

Bug: 26664600
Change-Id: I44dee1306b5daca6f558c81b2b58252b35013e09

1 files changed, 121 insertions, 0 deletions

diff --git a/src/com/android/dialer/filterednumber/BlockedNumbersMigrator.java b/src/com/android/dialer/filterednumber/BlockedNumbersMigrator.java
new file mode 100644
index 000000000..de201d98a
--- /dev/null
+++ b/src/com/android/dialer/filterednumber/BlockedNumbersMigrator.java
@@ -0,0 +1,121 @@
+/*
+ * 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.dialer.filterednumber;
+
+import com.google.common.base.Preconditions;
+
+import android.content.ContentResolver;
+import android.content.ContentValues;
+import android.database.Cursor;
+import android.os.AsyncTask;
+import android.support.annotation.Nullable;
+
+import com.android.dialer.compat.BlockedNumbersSdkCompat;
+import com.android.dialer.compat.FilteredNumberCompat;
+import com.android.dialer.database.FilteredNumberContract;
+import com.android.dialer.database.FilteredNumberContract.FilteredNumber;
+import com.android.dialer.database.FilteredNumberContract.FilteredNumberColumns;
+
+/**
+ * Class which should be used to migrate numbers from {@link FilteredNumberContract} blocking to
+ * {@link android.provider.BlockedNumberContract} blocking.
+ */
+public class BlockedNumbersMigrator {
+
+    /**
+     * Listener for the operation to migrate from {@link FilteredNumberContract} blocking to
+     * {@link android.provider.BlockedNumberContract} blocking.
+     */
+    public interface Listener {
+
+        /**
+         * Called when the migration operation is finished.
+         */
+        void onComplete();
+    }
+
+    private final ContentResolver mContentResolver;
+
+    /**
+     * Creates a new BlockedNumbersMigrate, using the given {@link ContentResolver} to perform
+     * queries against the blocked numbers tables.
+     *
+     * @param contentResolver The ContentResolver
+     * @throws NullPointerException if contentResolver is null
+     */
+    public BlockedNumbersMigrator(ContentResolver contentResolver) {
+        mContentResolver = Preconditions.checkNotNull(contentResolver);
+    }
+
+    /**
+     * Copies all of the numbers in the {@link FilteredNumberContract} block list to the
+     * {@link android.provider.BlockedNumberContract} block list.
+     *
+     * @param listener {@link Listener} called once the migration is complete.
+     * @return {@code true} if the migrate can be attempted, {@code false} otherwise.
+     * @throws NullPointerException if listener is null
+     */
+    public boolean migrate(final Listener listener) {
+        if (!FilteredNumberCompat.canUseNewFiltering()) {
+            return false;
+        }
+        Preconditions.checkNotNull(listener);
+        new AsyncTask<Void, Void, Boolean>() {
+            @Override
+            protected Boolean doInBackground(Void... params) {
+                return migrateToNewBlockingInBackground(mContentResolver);
+            }
+
+            @Override
+            protected void onPostExecute(Boolean isSuccessful) {
+                FilteredNumberCompat.setHasMigratedToNewBlocking(isSuccessful);
+                listener.onComplete();
+            }
+        }.execute();
+        return true;
+    }
+
+    private static boolean migrateToNewBlockingInBackground(ContentResolver resolver) {
+        try (Cursor cursor = resolver.query(FilteredNumber.CONTENT_URI,
+                new String[]{FilteredNumberColumns.NUMBER}, null, null, null)) {
+            if (cursor == null) {
+                return false;
+            }
+
+            while (cursor.moveToNext()) {
+                String originalNumber = cursor
+                        .getString(cursor.getColumnIndex(FilteredNumberColumns.NUMBER));
+                if (isNumberInNewBlocking(resolver, originalNumber)) {
+                    continue;
+                }
+                ContentValues values = new ContentValues();
+                values.put(BlockedNumbersSdkCompat.COLUMN_ORIGINAL_NUMBER, originalNumber);
+                resolver.insert(BlockedNumbersSdkCompat.CONTENT_URI, values);
+            }
+            return true;
+        }
+    }
+
+    private static boolean isNumberInNewBlocking(ContentResolver resolver, String originalNumber) {
+        try (Cursor cursor = resolver.query(BlockedNumbersSdkCompat.CONTENT_URI,
+                new String[]{BlockedNumbersSdkCompat._ID},
+                BlockedNumbersSdkCompat.COLUMN_ORIGINAL_NUMBER + " = ?",
+                new String[] {originalNumber}, null)) {
+            return cursor != null && cursor.getCount() != 0;
+        }
+    }
+}