1 files changed, 120 insertions, 0 deletions
diff --git a/java/com/android/dialer/calllog/datasources/systemcalllog/SystemCallLogDataSource.java b/java/com/android/dialer/calllog/datasources/systemcalllog/SystemCallLogDataSource.java
new file mode 100644
index 000000000..ea6663fbe
--- /dev/null
+++ b/java/com/android/dialer/calllog/datasources/systemcalllog/SystemCallLogDataSource.java
@@ -0,0 +1,120 @@
+/*
+ * Copyright (C) 2017 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.calllog.datasources.systemcalllog;
+
+import android.content.Context;
+import android.database.ContentObserver;
+import android.database.sqlite.SQLiteDatabase;
+import android.net.Uri;
+import android.os.Handler;
+import android.provider.CallLog;
+import android.support.annotation.MainThread;
+import android.support.annotation.WorkerThread;
+import com.android.dialer.calllog.database.CallLogMutations;
+import com.android.dialer.calllog.datasources.CallLogDataSource;
+import com.android.dialer.common.Assert;
+import com.android.dialer.common.LogUtil;
+import com.android.dialer.common.concurrent.ThreadUtil;
+import com.android.dialer.util.PermissionsUtil;
+import javax.inject.Inject;
+
+/**
+ * Responsible for defining the rows in the annotated call log and maintaining the columns in it
+ * which are derived from the system call log.
+ */
+public class SystemCallLogDataSource implements CallLogDataSource {
+
+  @Inject
+  public SystemCallLogDataSource() {}
+
+  @MainThread
+  @Override
+  public void registerContentObservers(
+      Context appContext, ContentObserverCallbacks contentObserverCallbacks) {
+    Assert.isMainThread();
+
+    if (!PermissionsUtil.hasCallLogReadPermissions(appContext)) {
+      LogUtil.i("SystemCallLogDataSource.registerContentObservers", "no call log permissions");
+      return;
+    }
+
+    appContext
+        .getContentResolver()
+        .registerContentObserver(
+            CallLog.Calls.CONTENT_URI,
+            true,
+            new CallLogObserver(
+                ThreadUtil.getUiThreadHandler(), appContext, contentObserverCallbacks));
+  }
+
+  @WorkerThread
+  @Override
+  public boolean isDirty(Context appContext) {
+    Assert.isWorkerThread();
+
+    /*
+     * The system call log has a last updated timestamp, but deletes are physical (the "deleted"
+     * column is unused). This means that we can't detect deletes without scanning the entire table,
+     * which would be too slow. So, we just rely on content observers to trigger rebuilds when any
+     * change is made to the system call log.
+     */
+    return false;
+  }
+
+  @WorkerThread
+  @Override
+  public void fill(
+      Context appContext,
+      SQLiteDatabase readableDatabase,
+      long lastRebuildTimeMillis,
+      CallLogMutations mutations) {
+    Assert.isWorkerThread();
+
+    // This data source should always run first so the mutations should always be empty.
+    Assert.checkState(mutations.isEmpty());
+
+    // TODO: Implementation.
+  }
+
+  private static class CallLogObserver extends ContentObserver {
+    private final Context appContext;
+    private final ContentObserverCallbacks contentObserverCallbacks;
+
+    CallLogObserver(
+        Handler handler, Context appContext, ContentObserverCallbacks contentObserverCallbacks) {
+      super(handler);
+      this.appContext = appContext;
+      this.contentObserverCallbacks = contentObserverCallbacks;
+    }
+
+    @MainThread
+    @Override
+    public void onChange(boolean selfChange, Uri uri) {
+      Assert.isMainThread();
+      LogUtil.enterBlock("SystemCallLogDataSource.CallLogObserver.onChange");
+      super.onChange(selfChange, uri);
+
+      /*
+       * The system call log has a last updated timestamp, but deletes are physical (the "deleted"
+       * column is unused). This means that we can't detect deletes without scanning the entire
+       * table, which would be too slow. So, we just rely on content observers to trigger rebuilds
+       * when any change is made to the system call log.
+       */
+      contentObserverCallbacks.markDirtyAndNotify(appContext);
+    }
+  }
+}