1 files changed, 137 insertions, 0 deletions
diff --git a/java/com/android/voicemail/impl/transcribe/TranscriptionDbHelper.java b/java/com/android/voicemail/impl/transcribe/TranscriptionDbHelper.java
new file mode 100644
index 000000000..9d3c2e4a7
--- /dev/null
+++ b/java/com/android/voicemail/impl/transcribe/TranscriptionDbHelper.java
@@ -0,0 +1,137 @@
+/*
+ * 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.voicemail.impl.transcribe;
+
+import android.annotation.TargetApi;
+import android.content.ContentResolver;
+import android.content.ContentUris;
+import android.content.ContentValues;
+import android.content.Context;
+import android.database.Cursor;
+import android.net.Uri;
+import android.os.Build.VERSION_CODES;
+import android.provider.VoicemailContract.Voicemails;
+import android.support.annotation.VisibleForTesting;
+import android.support.annotation.WorkerThread;
+import android.support.v4.os.BuildCompat;
+import android.util.Pair;
+import com.android.dialer.common.Assert;
+import com.android.dialer.common.LogUtil;
+import java.util.ArrayList;
+import java.util.List;
+
+/** Helper class for reading and writing transcription data in the database */
+@TargetApi(VERSION_CODES.O)
+public class TranscriptionDbHelper {
+  @VisibleForTesting
+  static final String[] PROJECTION =
+      new String[] {
+        Voicemails._ID, // 0
+        Voicemails.TRANSCRIPTION, // 1
+        VoicemailCompat.TRANSCRIPTION_STATE // 2
+      };
+
+  static final int ID = 0;
+  static final int TRANSCRIPTION = 1;
+  static final int TRANSCRIPTION_STATE = 2;
+
+  private final ContentResolver contentResolver;
+  private final Uri uri;
+
+  TranscriptionDbHelper(Context context, Uri uri) {
+    Assert.isNotNull(uri);
+    this.contentResolver = context.getContentResolver();
+    this.uri = uri;
+  }
+
+  TranscriptionDbHelper(Context context) {
+    this(context, Voicemails.buildSourceUri(context.getPackageName()));
+  }
+
+  @WorkerThread
+  @TargetApi(VERSION_CODES.M) // used for try with resources
+  Pair<String, Integer> getTranscriptionAndState() {
+    Assert.checkState(BuildCompat.isAtLeastO());
+    Assert.isWorkerThread();
+    try (Cursor cursor = contentResolver.query(uri, PROJECTION, null, null, null)) {
+      if (cursor == null) {
+        LogUtil.e("TranscriptionDbHelper.getTranscriptionAndState", "query failed.");
+        return null;
+      }
+
+      if (cursor.moveToFirst()) {
+        String transcription = cursor.getString(TRANSCRIPTION);
+        int transcriptionState = cursor.getInt(TRANSCRIPTION_STATE);
+        return new Pair<>(transcription, transcriptionState);
+      }
+    }
+    LogUtil.i("TranscriptionDbHelper.getTranscriptionAndState", "query returned no results");
+    return null;
+  }
+
+  @WorkerThread
+  @TargetApi(VERSION_CODES.M) // used for try with resources
+  List<Uri> getUntranscribedVoicemails() {
+    Assert.checkArgument(BuildCompat.isAtLeastO());
+    Assert.isWorkerThread();
+    List<Uri> untranscribed = new ArrayList<>();
+    String whereClause =
+        Voicemails.TRANSCRIPTION + " is NULL AND " + VoicemailCompat.TRANSCRIPTION_STATE + "=?";
+    String[] whereArgs = {String.valueOf(VoicemailCompat.TRANSCRIPTION_NOT_STARTED)};
+    try (Cursor cursor = contentResolver.query(uri, PROJECTION, whereClause, whereArgs, null)) {
+      if (cursor == null) {
+        LogUtil.e("TranscriptionDbHelper.getUntranscribedVoicemails", "query failed.");
+      } else {
+        while (cursor.moveToNext()) {
+          untranscribed.add(ContentUris.withAppendedId(uri, cursor.getLong(ID)));
+        }
+      }
+    }
+    return untranscribed;
+  }
+
+  @WorkerThread
+  void setTranscriptionState(int transcriptionState) {
+    Assert.isWorkerThread();
+    LogUtil.i(
+        "TranscriptionDbHelper.setTranscriptionState",
+        "uri: " + uri + ", state: " + transcriptionState);
+    ContentValues values = new ContentValues();
+    values.put(VoicemailCompat.TRANSCRIPTION_STATE, transcriptionState);
+    updateDatabase(values);
+  }
+
+  @WorkerThread
+  void setTranscriptionAndState(String transcription, int transcriptionState) {
+    Assert.isWorkerThread();
+    LogUtil.i(
+        "TranscriptionDbHelper.setTranscriptionAndState",
+        "uri: " + uri + ", state: " + transcriptionState);
+    ContentValues values = new ContentValues();
+    values.put(Voicemails.TRANSCRIPTION, transcription);
+    values.put(VoicemailCompat.TRANSCRIPTION_STATE, transcriptionState);
+    updateDatabase(values);
+  }
+
+  private void updateDatabase(ContentValues values) {
+    int updatedCount = contentResolver.update(uri, values, null, null);
+    if (updatedCount != 1) {
+      LogUtil.e(
+          "TranscriptionDbHelper.updateDatabase",
+          "Wrong row count, should have updated 1 row, was: " + updatedCount);
+    }
+  }
+}