1 files changed, 124 insertions, 0 deletions
diff --git a/java/com/android/incallui/legacyblocking/DeleteBlockedCallTask.java b/java/com/android/incallui/legacyblocking/DeleteBlockedCallTask.java
new file mode 100644
index 000000000..a3f2dfa4d
--- /dev/null
+++ b/java/com/android/incallui/legacyblocking/DeleteBlockedCallTask.java
@@ -0,0 +1,124 @@
+/*
+ * Copyright (C) 2016 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.incallui.legacyblocking;
+
+import android.Manifest.permission;
+import android.annotation.TargetApi;
+import android.content.Context;
+import android.content.pm.PackageManager;
+import android.database.Cursor;
+import android.os.AsyncTask;
+import android.os.Build.VERSION_CODES;
+import android.provider.CallLog;
+import android.support.v4.content.ContextCompat;
+import com.android.dialer.common.LogUtil;
+import com.android.dialer.telecom.TelecomUtil;
+import java.util.Objects;
+
+/**
+ * Deletes a blocked call from the call log. This is only used on Android Marshmallow. On later
+ * versions of the OS, call blocking is implemented in the system and there's no need to mess with
+ * the call log.
+ */
+@TargetApi(VERSION_CODES.M)
+public class DeleteBlockedCallTask extends AsyncTask<Void, Void, Long> {
+
+  public static final String IDENTIFIER = "DeleteBlockedCallTask";
+
+  // Try to identify if a call log entry corresponds to a number which was blocked. We match by
+  // by comparing its creation time to the time it was added in the InCallUi and seeing if they
+  // fall within a certain threshold.
+  private static final int MATCH_BLOCKED_CALL_THRESHOLD_MS = 3000;
+
+  private final Context context;
+  private final Listener listener;
+  private final String number;
+  private final long timeAddedMillis;
+
+  /**
+   * Creates the task to delete the new {@link CallLog} entry from the given blocked number.
+   *
+   * @param number The blocked number.
+   * @param timeAddedMillis The time at which the call from the blocked number was placed.
+   */
+  public DeleteBlockedCallTask(
+      Context context, Listener listener, String number, long timeAddedMillis) {
+    this.context = Objects.requireNonNull(context);
+    this.listener = Objects.requireNonNull(listener);
+    this.number = number;
+    this.timeAddedMillis = timeAddedMillis;
+  }
+
+  @Override
+  public Long doInBackground(Void... params) {
+    if (ContextCompat.checkSelfPermission(context, permission.READ_CALL_LOG)
+            != PackageManager.PERMISSION_GRANTED
+        || ContextCompat.checkSelfPermission(context, permission.WRITE_CALL_LOG)
+            != PackageManager.PERMISSION_GRANTED) {
+      LogUtil.i("DeleteBlockedCallTask.doInBackground", "missing call log permissions");
+      return -1L;
+    }
+
+    // First, lookup the call log entry of the most recent call with this number.
+    try (Cursor cursor =
+        context
+            .getContentResolver()
+            .query(
+                TelecomUtil.getCallLogUri(context),
+                CallLogDeleteBlockedCallQuery.PROJECTION,
+                CallLog.Calls.NUMBER + "= ?",
+                new String[] {number},
+                CallLog.Calls.DATE + " DESC LIMIT 1")) {
+
+      // If match is found, delete this call log entry and return the call log entry id.
+      if (cursor != null && cursor.moveToFirst()) {
+        long creationTime = cursor.getLong(CallLogDeleteBlockedCallQuery.DATE_COLUMN_INDEX);
+        if (timeAddedMillis > creationTime
+            && timeAddedMillis - creationTime < MATCH_BLOCKED_CALL_THRESHOLD_MS) {
+          long callLogEntryId = cursor.getLong(CallLogDeleteBlockedCallQuery.ID_COLUMN_INDEX);
+          context
+              .getContentResolver()
+              .delete(
+                  TelecomUtil.getCallLogUri(context),
+                  CallLog.Calls._ID + " IN (" + callLogEntryId + ")",
+                  null);
+          return callLogEntryId;
+        }
+      }
+    }
+    return -1L;
+  }
+
+  @Override
+  public void onPostExecute(Long callLogEntryId) {
+    listener.onDeleteBlockedCallTaskComplete(callLogEntryId >= 0);
+  }
+
+  /** Callback invoked when delete is complete. */
+  public interface Listener {
+
+    void onDeleteBlockedCallTaskComplete(boolean didFindEntry);
+  }
+
+  private static class CallLogDeleteBlockedCallQuery {
+
+    static final String[] PROJECTION = new String[] {CallLog.Calls._ID, CallLog.Calls.DATE};
+
+    static final int ID_COLUMN_INDEX = 0;
+    static final int DATE_COLUMN_INDEX = 1;
+  }
+}