content: package de.danoeh.antennapod.storage.database;
  
  import android.content.ContentValues;
  import android.content.Context;
  import android.database.Cursor;
  import android.database.DatabaseErrorHandler;
  import android.database.DatabaseUtils;
  import android.database.DefaultDatabaseErrorHandler;
  import android.database.SQLException;
  import android.database.sqlite.SQLiteDatabase;
  import android.database.sqlite.SQLiteDatabase.CursorFactory;
  import android.database.sqlite.SQLiteOpenHelper;
  import android.text.TextUtils;
  import android.util.Log;
  
  import androidx.annotation.NonNull;
  import androidx.annotation.Nullable;
  import androidx.annotation.VisibleForTesting;
  
  import de.danoeh.antennapod.model.feed.FeedCounter;
  import de.danoeh.antennapod.model.feed.FeedFunding;
  
  import java.io.File;
  import java.io.IOException;
  import java.util.Date;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Locale;
  import java.util.Map;
  import java.util.Set;
  
  import de.danoeh.antennapod.model.feed.Chapter;
  import de.danoeh.antennapod.model.feed.Feed;
  import de.danoeh.antennapod.model.feed.FeedItem;
  import de.danoeh.antennapod.model.feed.FeedItemFilter;
  import de.danoeh.antennapod.model.feed.FeedMedia;
  import de.danoeh.antennapod.model.feed.FeedPreferences;
  import de.danoeh.antennapod.model.download.DownloadResult;
  import de.danoeh.antennapod.model.feed.SortOrder;
  import de.danoeh.antennapod.storage.database.mapper.FeedItemFilterQuery;
  import de.danoeh.antennapod.storage.database.mapper.FeedItemSortQuery;
  
  import org.apache.commons.io.FileUtils;
  
  import static de.danoeh.antennapod.model.feed.FeedPreferences.SPEED_USE_GLOBAL;
  import static de.danoeh.antennapod.model.feed.SortOrder.toCodeString;
  
  /**
   * Implements methods for accessing the database
   */
  public class PodDBAdapter {
  
      private static final String TAG = "PodDBAdapter";
      public static final String DATABASE_NAME = "Antennapod.db";
      public static final int VERSION = 3080000;
  
      /**
       * Maximum number of arguments for IN-operator.
       */
      private static final int IN_OPERATOR_MAXIMUM = 800;
  
      // Key-constants
      public static final String KEY_ID = "id";
      public static final String KEY_TITLE = "title";
      public static final String KEY_CUSTOM_TITLE = "custom_title";
      public static final String KEY_LINK = "link";
      public static final String KEY_DESCRIPTION = "description";
      public static final String KEY_FILE_URL = "file_url";
      public static final String KEY_DOWNLOAD_URL = "download_url";
      public static final String KEY_PUBDATE = "pubDate";
      public static final String KEY_READ = "read";
      public static final String KEY_DURATION = "duration";
      public static final String KEY_POSITION = "position";
      public static final String KEY_SIZE = "filesize";
      public static final String KEY_MIME_TYPE = "mime_type";
      public static final String KEY_IMAGE_URL = "image_url";
      public static final String KEY_FEED = "feed";
      public static final String KEY_MEDIA = "media";
      public static final String KEY_DOWNLOAD_DATE = "downloaded";
      public static final String KEY_LAST_REFRESH_ATTEMPT = "downloaded";
      public static final String KEY_LASTUPDATE = "last_update";
      public static final String KEY_FEEDFILE = "feedfile";
      public static final String KEY_REASON = "reason";
      public static final String KEY_SUCCESSFUL = "successful";
      public static final String KEY_FEEDFILETYPE = "feedfile_type";
      public static final String KEY_COMPLETION_DATE = "completion_date";
      public static final String KEY_FEEDITEM = "feeditem";
      public static final String KEY_PAYMENT_LINK = "payment_link";
      public static final String KEY_START = "start";
      public static final String KEY_LANGUAGE = "language";
      public static final String KEY_AUTHOR = "author";
      public static final String KEY_HAS_CHAPTERS = "has_simple_chapters";
      public static final String KEY_TYPE = "type";
      public static final String KEY_ITEM_IDENTIFIER = "item_identifier";
      public static final String KEY_FEED_IDENTIFIER = "feed_identifier";
      public static final String KEY_REASON_DETAILED = "reason_detailed";
      public static final String KEY_DOWNLOADSTATUS_TITLE = "title";
      public static final String KEY_AUTO_DOWNLOAD_ENABLED = "auto_download"; // Both tables use the same key
      public static final String KEY_KEEP_UPDATED = "keep_updated";
      public static final String KEY_AUTO_DELETE_ACTION = "auto_delete_action";
      public static final String KEY_FEED_VOLUME_ADAPTION = "feed_volume_adaption";
      public static final String KEY_PLAYED_DURATION = "played_duration";
      public static final String KEY_USERNAME = "username";
      public static final String KEY_PASSWORD = "password";
      public static final String KEY_IS_PAGED = "is_paged";
      public static final String KEY_NEXT_PAGE_LINK = "next_page_link";
      public static final String KEY_HIDE = "hide";
      public static final String KEY_SORT_ORDER = "sort_order";
      public static final String KEY_LAST_UPDATE_FAILED = "last_update_failed";
      public static final String KEY_HAS_EMBEDDED_PICTURE = "has_embedded_picture";
      public static final String KEY_LAST_PLAYED_TIME_HISTORY = "playback_completion_date";
      public static final String KEY_LAST_PLAYED_TIME_STATISTICS = "last_played_time";
      public static final String KEY_INCLUDE_FILTER = "include_filter";
      public static final String KEY_EXCLUDE_FILTER = "exclude_filter";
      public static final String KEY_MINIMAL_DURATION_FILTER = "minimal_duration_filter";
      public static final String KEY_FEED_PLAYBACK_SPEED = "feed_playback_speed";
      public static final String KEY_FEED_SKIP_SILENCE = "feed_skip_silence";
      public static final String KEY_FEED_SKIP_INTRO = "feed_skip_intro";
      public static final String KEY_FEED_SKIP_ENDING = "feed_skip_ending";
      public static final String KEY_FEED_TAGS = "tags";
      public static final String KEY_EPISODE_NOTIFICATION = "episode_notification";
      public static final String KEY_NEW_EPISODES_ACTION = "new_episodes_action";
      public static final String KEY_PODCASTINDEX_CHAPTER_URL = "podcastindex_chapter_url";
      public static final String KEY_SOCIAL_INTERACT_URL = "social_interact_url";
      public static final String KEY_STATE = "state";
      public static final String KEY_PODCASTINDEX_TRANSCRIPT_URL = "podcastindex_transcript_url";
      public static final String KEY_PODCASTINDEX_TRANSCRIPT_TYPE = "podcastindex_transcript_type";
  
      // Table names
      public static final String TABLE_NAME_FEEDS = "Feeds";
      public static final String TABLE_NAME_FEED_ITEMS = "FeedItems";
      public static final String TABLE_NAME_FEED_IMAGES = "FeedImages";
      public static final String TABLE_NAME_FEED_MEDIA = "FeedMedia";
      public static final String TABLE_NAME_DOWNLOAD_LOG = "DownloadLog";
      public static final String TABLE_NAME_QUEUE = "Queue";
      public static final String TABLE_NAME_SIMPLECHAPTERS = "SimpleChapters";
      public static final String TABLE_NAME_FAVORITES = "Favorites";
  
      // SQL Statements for creating new tables
      private static final String TABLE_PRIMARY_KEY = KEY_ID
              + " INTEGER PRIMARY KEY AUTOINCREMENT ,";
  
      private static final String CREATE_TABLE_FEEDS = "CREATE TABLE " + TABLE_NAME_FEEDS + " ("
              + TABLE_PRIMARY_KEY + KEY_TITLE + " TEXT,"
              + KEY_CUSTOM_TITLE + " TEXT,"
              + KEY_FILE_URL + " TEXT,"
              + KEY_DOWNLOAD_URL + " TEXT,"
              + KEY_LAST_REFRESH_ATTEMPT + " INTEGER,"
              + KEY_LINK + " TEXT,"
              + KEY_DESCRIPTION + " TEXT,"
              + KEY_PAYMENT_LINK + " TEXT,"
              + KEY_LASTUPDATE + " TEXT,"
              + KEY_LANGUAGE + " TEXT,"
              + KEY_AUTHOR + " TEXT,"
              + KEY_IMAGE_URL + " TEXT,"
              + KEY_TYPE + " TEXT,"
              + KEY_FEED_IDENTIFIER + " TEXT,"
              + KEY_AUTO_DOWNLOAD_ENABLED + " INTEGER DEFAULT 1,"
              + KEY_USERNAME + " TEXT,"
              + KEY_PASSWORD + " TEXT,"
              + KEY_INCLUDE_FILTER + " TEXT DEFAULT '',"
              + KEY_EXCLUDE_FILTER + " TEXT DEFAULT '',"
              + KEY_MINIMAL_DURATION_FILTER + " INTEGER DEFAULT -1,"
              + KEY_KEEP_UPDATED + " INTEGER DEFAULT 1,"
              + KEY_IS_PAGED + " INTEGER DEFAULT 0,"
              + KEY_NEXT_PAGE_LINK + " TEXT,"
              + KEY_HIDE + " TEXT,"
              + KEY_SORT_ORDER + " TEXT,"
              + KEY_LAST_UPDATE_FAILED + " INTEGER DEFAULT 0,"
              + KEY_AUTO_DELETE_ACTION + " INTEGER DEFAULT 0,"
              + KEY_FEED_PLAYBACK_SPEED + " REAL DEFAULT " + SPEED_USE_GLOBAL + ","
              + KEY_FEED_SKIP_SILENCE + " INTEGER DEFAULT " + FeedPreferences.SkipSilence.GLOBAL.code + ","
              + KEY_FEED_VOLUME_ADAPTION + " INTEGER DEFAULT 0,"
              + KEY_FEED_TAGS + " TEXT,"
              + KEY_FEED_SKIP_INTRO + " INTEGER DEFAULT 0,"
              + KEY_FEED_SKIP_ENDING + " INTEGER DEFAULT 0,"
              + KEY_EPISODE_NOTIFICATION + " INTEGER DEFAULT 0,"
              + KEY_STATE + " INTEGER DEFAULT " + Feed.STATE_SUBSCRIBED + ","
              + KEY_NEW_EPISODES_ACTION + " INTEGER DEFAULT 0)";
  
      private static final String CREATE_TABLE_FEED_ITEMS = "CREATE TABLE "
              + TABLE_NAME_FEED_ITEMS + " (" + TABLE_PRIMARY_KEY
              + KEY_TITLE + " TEXT," + KEY_PUBDATE + " INTEGER,"
              + KEY_READ + " INTEGER," + KEY_LINK + " TEXT,"
              + KEY_DESCRIPTION + " TEXT," + KEY_PAYMENT_LINK + " TEXT,"
              + KEY_MEDIA + " INTEGER," + KEY_FEED + " INTEGER,"
              + KEY_HAS_CHAPTERS + " INTEGER," + KEY_ITEM_IDENTIFIER + " TEXT,"
              + KEY_IMAGE_URL + " TEXT,"
              + KEY_AUTO_DOWNLOAD_ENABLED + " INTEGER,"
              + KEY_PODCASTINDEX_CHAPTER_URL + " TEXT,"
              + KEY_PODCASTINDEX_TRANSCRIPT_TYPE + " TEXT,"
              + KEY_PODCASTINDEX_TRANSCRIPT_URL + " TEXT,"
              + KEY_SOCIAL_INTERACT_URL + " TEXT)";
  
      private static final String CREATE_TABLE_FEED_MEDIA = "CREATE TABLE "
              + TABLE_NAME_FEED_MEDIA + " (" + TABLE_PRIMARY_KEY + KEY_DURATION
              + " INTEGER," + KEY_FILE_URL + " TEXT," + KEY_DOWNLOAD_URL
              + " TEXT," + KEY_DOWNLOAD_DATE + " INTEGER," + KEY_POSITION
              + " INTEGER," + KEY_SIZE + " INTEGER," + KEY_MIME_TYPE + " TEXT,"
              + KEY_LAST_PLAYED_TIME_HISTORY + " INTEGER,"
              + KEY_FEEDITEM + " INTEGER,"
              + KEY_PLAYED_DURATION + " INTEGER,"
              + KEY_HAS_EMBEDDED_PICTURE + " INTEGER,"
              + KEY_LAST_PLAYED_TIME_STATISTICS + " INTEGER" + ")";
  
      private static final String CREATE_TABLE_DOWNLOAD_LOG = "CREATE TABLE "
              + TABLE_NAME_DOWNLOAD_LOG + " (" + TABLE_PRIMARY_KEY + KEY_FEEDFILE
              + " INTEGER," + KEY_FEEDFILETYPE + " INTEGER," + KEY_REASON
              + " INTEGER," + KEY_SUCCESSFUL + " INTEGER," + KEY_COMPLETION_DATE
              + " INTEGER," + KEY_REASON_DETAILED + " TEXT,"
              + KEY_DOWNLOADSTATUS_TITLE + " TEXT)";
  
      private static final String CREATE_TABLE_QUEUE = "CREATE TABLE "
              + TABLE_NAME_QUEUE + "(" + KEY_ID + " INTEGER PRIMARY KEY,"
              + KEY_FEEDITEM + " INTEGER," + KEY_FEED + " INTEGER)";
  
      private static final String CREATE_TABLE_SIMPLECHAPTERS = "CREATE TABLE "
              + TABLE_NAME_SIMPLECHAPTERS + " (" + TABLE_PRIMARY_KEY + KEY_TITLE
              + " TEXT," + KEY_START + " INTEGER," + KEY_FEEDITEM + " INTEGER,"
              + KEY_LINK + " TEXT," + KEY_IMAGE_URL + " TEXT)";
  
      // SQL Statements for creating indexes
      static final String CREATE_INDEX_FEEDITEMS_FEED = "CREATE INDEX "
              + TABLE_NAME_FEED_ITEMS + "_" + KEY_FEED + " ON " + TABLE_NAME_FEED_ITEMS + " ("
              + KEY_FEED + ")";
  
      static final String CREATE_INDEX_FEEDITEMS_PUBDATE = "CREATE INDEX "
              + TABLE_NAME_FEED_ITEMS + "_" + KEY_PUBDATE + " ON " + TABLE_NAME_FEED_ITEMS + " ("
              + KEY_PUBDATE + ")";
  
      static final String CREATE_INDEX_FEEDITEMS_READ = "CREATE INDEX "
              + TABLE_NAME_FEED_ITEMS + "_" + KEY_READ + " ON " + TABLE_NAME_FEED_ITEMS + " ("
              + KEY_READ + ")";
  
      static final String CREATE_INDEX_QUEUE_FEEDITEM = "CREATE INDEX "
              + TABLE_NAME_QUEUE + "_" + KEY_FEEDITEM + " ON " + TABLE_NAME_QUEUE + " ("
              + KEY_FEEDITEM + ")";
  
      static final String CREATE_INDEX_FEEDMEDIA_FEEDITEM = "CREATE INDEX "
              + TABLE_NAME_FEED_MEDIA + "_" + KEY_FEEDITEM + " ON " + TABLE_NAME_FEED_MEDIA + " ("
              + KEY_FEEDITEM + ")";
  
      static final String CREATE_INDEX_SIMPLECHAPTERS_FEEDITEM = "CREATE INDEX "
              + TABLE_NAME_SIMPLECHAPTERS + "_" + KEY_FEEDITEM + " ON " + TABLE_NAME_SIMPLECHAPTERS + " ("
              + KEY_FEEDITEM + ")";
  
      static final String CREATE_TABLE_FAVORITES = "CREATE TABLE "
              + TABLE_NAME_FAVORITES + "(" + KEY_ID + " INTEGER PRIMARY KEY,"
              + KEY_FEEDITEM + " INTEGER," + KEY_FEED + " INTEGER)";
  
      /**
       * All the tables in the database
       */
      private static final String[] ALL_TABLES = {
              TABLE_NAME_FEEDS,
              TABLE_NAME_FEED_ITEMS,
              TABLE_NAME_FEED_MEDIA,
              TABLE_NAME_DOWNLOAD_LOG,
              TABLE_NAME_QUEUE,
              TABLE_NAME_SIMPLECHAPTERS,
              TABLE_NAME_FAVORITES
      };
  
      public static final String SELECT_KEY_ITEM_ID = "item_id";
      public static final String SELECT_KEY_MEDIA_ID = "media_id";
      public static final String SELECT_KEY_FEED_ID = "feed_id";
  
      private static final String KEYS_FEED_ITEM_WITHOUT_DESCRIPTION =
              TABLE_NAME_FEED_ITEMS + "." + KEY_ID + " AS " + SELECT_KEY_ITEM_ID + ", "
              + TABLE_NAME_FEED_ITEMS + "." + KEY_TITLE + ", "
              + TABLE_NAME_FEED_ITEMS + "." + KEY_PUBDATE + ", "
              + TABLE_NAME_FEED_ITEMS + "." + KEY_READ + ", "
              + TABLE_NAME_FEED_ITEMS + "." + KEY_LINK + ", "
              + TABLE_NAME_FEED_ITEMS + "." + KEY_PAYMENT_LINK + ", "
              + TABLE_NAME_FEED_ITEMS + "." + KEY_MEDIA + ", "
              + TABLE_NAME_FEED_ITEMS + "." + KEY_FEED + ", "
              + TABLE_NAME_FEED_ITEMS + "." + KEY_HAS_CHAPTERS + ", "
              + TABLE_NAME_FEED_ITEMS + "." + KEY_ITEM_IDENTIFIER + ", "
              + TABLE_NAME_FEED_ITEMS + "." + KEY_IMAGE_URL + ", "
              + TABLE_NAME_FEED_ITEMS + "." + KEY_AUTO_DOWNLOAD_ENABLED + ", "
              + TABLE_NAME_FEED_ITEMS + "." + KEY_PODCASTINDEX_CHAPTER_URL + ", "
              + TABLE_NAME_FEED_ITEMS + "." + KEY_SOCIAL_INTERACT_URL + ", "
              + TABLE_NAME_FEED_ITEMS + "." + KEY_PODCASTINDEX_TRANSCRIPT_TYPE + ", "
              + TABLE_NAME_FEED_ITEMS + "." + KEY_PODCASTINDEX_TRANSCRIPT_URL;
  
      private static final String KEYS_FEED_MEDIA =
              TABLE_NAME_FEED_MEDIA + "." + KEY_ID + " AS " + SELECT_KEY_MEDIA_ID + ", "
              + TABLE_NAME_FEED_MEDIA + "." + KEY_DURATION + ", "
              + TABLE_NAME_FEED_MEDIA + "." + KEY_FILE_URL + ", "
              + TABLE_NAME_FEED_MEDIA + "." + KEY_DOWNLOAD_URL + ", "
              + TABLE_NAME_FEED_MEDIA + "." + KEY_DOWNLOAD_DATE + ", "
              + TABLE_NAME_FEED_MEDIA + "." + KEY_POSITION + ", "
              + TABLE_NAME_FEED_MEDIA + "." + KEY_SIZE + ", "
              + TABLE_NAME_FEED_MEDIA + "." + KEY_MIME_TYPE + ", "
              + TABLE_NAME_FEED_MEDIA + "." + KEY_LAST_PLAYED_TIME_HISTORY + ", "
              + TABLE_NAME_FEED_MEDIA + "." + KEY_FEEDITEM + ", "
              + TABLE_NAME_FEED_MEDIA + "." + KEY_PLAYED_DURATION + ", "
              + TABLE_NAME_FEED_MEDIA + "." + KEY_HAS_EMBEDDED_PICTURE + ", "
              + TABLE_NAME_FEED_MEDIA + "." + KEY_LAST_PLAYED_TIME_STATISTICS;
  
      private static final String KEYS_FEED =
              TABLE_NAME_FEEDS + "." + KEY_ID + " AS " + SELECT_KEY_FEED_ID + ", "
              + TABLE_NAME_FEEDS + "." + KEY_TITLE + ", "
              + TABLE_NAME_FEEDS + "." + KEY_CUSTOM_TITLE + ", "
              + TABLE_NAME_FEEDS + "." + KEY_FILE_URL + ", "
              + TABLE_NAME_FEEDS + "." + KEY_DOWNLOAD_URL + ", "
              + TABLE_NAME_FEEDS + "." + KEY_LAST_REFRESH_ATTEMPT + ", "
              + TABLE_NAME_FEEDS + "." + KEY_LINK + ", "
              + TABLE_NAME_FEEDS + "." + KEY_DESCRIPTION + ", "
              + TABLE_NAME_FEEDS + "." + KEY_PAYMENT_LINK + ", "
              + TABLE_NAME_FEEDS + "." + KEY_LASTUPDATE + ", "
              + TABLE_NAME_FEEDS + "." + KEY_LANGUAGE + ", "
              + TABLE_NAME_FEEDS + "." + KEY_AUTHOR + ", "
              + TABLE_NAME_FEEDS + "." + KEY_IMAGE_URL + ", "
              + TABLE_NAME_FEEDS + "." + KEY_TYPE + ", "
              + TABLE_NAME_FEEDS + "." + KEY_FEED_IDENTIFIER + ", "
              + TABLE_NAME_FEEDS + "." + KEY_IS_PAGED + ", "
              + TABLE_NAME_FEEDS + "." + KEY_NEXT_PAGE_LINK + ", "
              + TABLE_NAME_FEEDS + "." + KEY_LAST_UPDATE_FAILED + ", "
              + TABLE_NAME_FEEDS + "." + KEY_AUTO_DOWNLOAD_ENABLED + ", "
              + TABLE_NAME_FEEDS + "." + KEY_KEEP_UPDATED + ", "
              + TABLE_NAME_FEEDS + "." + KEY_USERNAME + ", "
              + TABLE_NAME_FEEDS + "." + KEY_PASSWORD + ", "
              + TABLE_NAME_FEEDS + "." + KEY_HIDE + ", "
              + TABLE_NAME_FEEDS + "." + KEY_SORT_ORDER + ", "
              + TABLE_NAME_FEEDS + "." + KEY_AUTO_DELETE_ACTION + ", "
              + TABLE_NAME_FEEDS + "." + KEY_FEED_VOLUME_ADAPTION + ", "
              + TABLE_NAME_FEEDS + "." + KEY_INCLUDE_FILTER + ", "
              + TABLE_NAME_FEEDS + "." + KEY_EXCLUDE_FILTER + ", "
              + TABLE_NAME_FEEDS + "." + KEY_MINIMAL_DURATION_FILTER + ", "
              + TABLE_NAME_FEEDS + "." + KEY_FEED_PLAYBACK_SPEED + ", "
              + TABLE_NAME_FEEDS + "." + KEY_FEED_SKIP_SILENCE + ", "
              + TABLE_NAME_FEEDS + "." + KEY_FEED_TAGS + ", "
              + TABLE_NAME_FEEDS + "." + KEY_FEED_SKIP_INTRO + ", "
              + TABLE_NAME_FEEDS + "." + KEY_FEED_SKIP_ENDING + ", "
              + TABLE_NAME_FEEDS + "." + KEY_EPISODE_NOTIFICATION + ", "
              + TABLE_NAME_FEEDS + "." + KEY_STATE + ", "
              + TABLE_NAME_FEEDS + "." + KEY_NEW_EPISODES_ACTION;
  
      private static final String JOIN_FEED_ITEM_AND_MEDIA = " LEFT JOIN " + TABLE_NAME_FEED_MEDIA
              + " ON " + TABLE_NAME_FEED_ITEMS + "." + KEY_ID + "=" + TABLE_NAME_FEED_MEDIA + "." + KEY_FEEDITEM + " ";
  
      private static final String SELECT_FEED_ITEMS_AND_MEDIA_WITH_DESCRIPTION =
              "SELECT " + KEYS_FEED_ITEM_WITHOUT_DESCRIPTION + ", " + KEYS_FEED_MEDIA + ", "
                      + TABLE_NAME_FEED_ITEMS + "." + KEY_DESCRIPTION
              + " FROM " + TABLE_NAME_FEED_ITEMS
              + JOIN_FEED_ITEM_AND_MEDIA;
      private static final String SELECT_FEED_ITEMS_AND_MEDIA =
              "SELECT " + KEYS_FEED_ITEM_WITHOUT_DESCRIPTION + ", " + KEYS_FEED_MEDIA
              + " FROM " + TABLE_NAME_FEED_ITEMS
              + JOIN_FEED_ITEM_AND_MEDIA;
      public static final String SELECT_WHERE_FEED_IS_SUBSCRIBED = TABLE_NAME_FEED_ITEMS + "." + KEY_FEED
              + " IN (SELECT " + KEY_ID + " FROM " + TABLE_NAME_FEEDS
              + " WHERE " + KEY_STATE + "=" + Feed.STATE_SUBSCRIBED + ")";
  
      private static Context context;
      private static PodDBAdapter instance;
  
      private final SQLiteDatabase db;
      private final PodDBHelper dbHelper;
  
      public static void init(Context context) {
          PodDBAdapter.context = context.getApplicationContext();
      }
  
      public static synchronized PodDBAdapter getInstance() {
          if (instance == null) {
              instance = new PodDBAdapter();
          }
          return instance;
      }
  
      private PodDBAdapter() {
          dbHelper = new PodDBHelper(PodDBAdapter.context, DATABASE_NAME, null);
          db = openDb();
      }
  
      private SQLiteDatabase openDb() {
          SQLiteDatabase newDb;
          try {
              newDb = dbHelper.getWritableDatabase();
              newDb.disableWriteAheadLogging();
          } catch (SQLException ex) {
              Log.e(TAG, Log.getStackTraceString(ex));
              newDb = dbHelper.getReadableDatabase();
          }
          return newDb;
      }
  
      public synchronized PodDBAdapter open() {
          // do nothing
          return this;
      }
  
      public synchronized void close() {
          // do nothing
      }
  
      /**
       * <p>Resets all database connections to ensure new database connections for
       * the next test case. Call method only for unit tests.</p>
       *
       * <p>That's a workaround for a Robolectric issue in ShadowSQLiteConnection
       * that leads to an error <tt>IllegalStateException: Illegal connection
       * pointer</tt> if several threads try to use the same database connection.
       * For more information see
       * <a href="https://github.com/robolectric/robolectric/issues/1890">robolectric/robolectric#1890</a>.</p>
       */
      @VisibleForTesting(otherwise = VisibleForTesting.NONE)
      public static void tearDownTests() {
          getInstance().dbHelper.close();
          instance = null;
      }
  
      public static boolean deleteDatabase() {
          PodDBAdapter adapter = getInstance();
          adapter.open();
          try {
              for (String tableName : ALL_TABLES) {
                  adapter.db.delete(tableName, "1", null);
              }
              return true;
          } finally {
              adapter.close();
          }
      }
  
      /**
       * Inserts or updates a feed entry
       *
       * @return the id of the entry
       */
      private long setFeed(Feed feed) {
          ContentValues values = new ContentValues();
          values.put(KEY_TITLE, feed.getFeedTitle());
          values.put(KEY_LINK, feed.getLink());
          values.put(KEY_DESCRIPTION, feed.getDescription());
          values.put(KEY_PAYMENT_LINK, FeedFunding.getPaymentLinksAsString(feed.getPaymentLinks()));
          values.put(KEY_AUTHOR, feed.getAuthor());
          values.put(KEY_LANGUAGE, feed.getLanguage());
          values.put(KEY_IMAGE_URL, feed.getImageUrl());
  
          values.put(KEY_FILE_URL, feed.getLocalFileUrl());
          values.put(KEY_DOWNLOAD_URL, feed.getDownloadUrl());
          values.put(KEY_LAST_REFRESH_ATTEMPT, feed.getLastRefreshAttempt());
          values.put(KEY_LASTUPDATE, feed.getLastModified());
          values.put(KEY_TYPE, feed.getType());
          values.put(KEY_FEED_IDENTIFIER, feed.getFeedIdentifier());
          values.put(KEY_STATE, feed.getState());
  
          values.put(KEY_IS_PAGED, feed.isPaged());
          values.put(KEY_NEXT_PAGE_LINK, feed.getNextPageLink());
          if (feed.getItemFilter() != null && feed.getItemFilter().getValues().length > 0) {
              values.put(KEY_HIDE, TextUtils.join(",", feed.getItemFilter().getValues()));
          } else {
              values.put(KEY_HIDE, "");
          }
          values.put(KEY_SORT_ORDER, toCodeString(feed.getSortOrder()));
          values.put(KEY_LAST_UPDATE_FAILED, feed.hasLastUpdateFailed());
          if (feed.getId() == 0) {
              // Create new entry
              Log.d(this.toString(), "Inserting new Feed into db");
              feed.setId(db.insert(TABLE_NAME_FEEDS, null, values));
          } else {
              Log.d(this.toString(), "Updating existing Feed in db");
              db.update(TABLE_NAME_FEEDS, values, KEY_ID + "=?",
                      new String[]{String.valueOf(feed.getId())});
          }
          return feed.getId();
      }
  
      public void setFeedPreferences(FeedPreferences prefs) {
          if (prefs.getFeedID() == 0) {
              throw new IllegalArgumentException("Feed ID of preference must not be null");
          }
          ContentValues values = new ContentValues();
          values.put(KEY_AUTO_DOWNLOAD_ENABLED, prefs.getAutoDownload().code);
          values.put(KEY_KEEP_UPDATED, prefs.getKeepUpdated());
          values.put(KEY_AUTO_DELETE_ACTION, prefs.getAutoDeleteAction().code);
          values.put(KEY_FEED_VOLUME_ADAPTION, prefs.getVolumeAdaptionSetting().toInteger());
          values.put(KEY_USERNAME, prefs.getUsername());
          values.put(KEY_PASSWORD, prefs.getPassword());
          values.put(KEY_INCLUDE_FILTER, prefs.getFilter().getIncludeFilterRaw());
          values.put(KEY_EXCLUDE_FILTER, prefs.getFilter().getExcludeFilterRaw());
          values.put(KEY_MINIMAL_DURATION_FILTER, prefs.getFilter().getMinimalDurationFilter());
          values.put(KEY_FEED_PLAYBACK_SPEED, prefs.getFeedPlaybackSpeed());
          values.put(KEY_FEED_SKIP_SILENCE, prefs.getFeedSkipSilence().code);
          values.put(KEY_FEED_TAGS, prefs.getTagsAsString());
          values.put(KEY_FEED_SKIP_INTRO, prefs.getFeedSkipIntro());
          values.put(KEY_FEED_SKIP_ENDING, prefs.getFeedSkipEnding());
          values.put(KEY_EPISODE_NOTIFICATION, prefs.getShowEpisodeNotification());
          values.put(KEY_NEW_EPISODES_ACTION, prefs.getNewEpisodesAction().code);
          db.update(TABLE_NAME_FEEDS, values, KEY_ID + "=?", new String[]{String.valueOf(prefs.getFeedID())});
      }
  
      public void setFeedItemFilter(long feedId, Set<String> filterValues) {
          String valuesList = TextUtils.join(",", filterValues);
          Log.d(TAG, String.format(Locale.US,
                  "setFeedItemFilter() called with: feedId = [%d], filterValues = [%s]", feedId, valuesList));
          ContentValues values = new ContentValues();
          values.put(KEY_HIDE, valuesList);
          db.update(TABLE_NAME_FEEDS, values, KEY_ID + "=?", new String[]{String.valueOf(feedId)});
      }
  
      public void setFeedItemSortOrder(long feedId, @Nullable SortOrder sortOrder) {
          ContentValues values = new ContentValues();
          values.put(KEY_SORT_ORDER, toCodeString(sortOrder));
          db.update(TABLE_NAME_FEEDS, values, KEY_ID + "=?", new String[]{String.valueOf(feedId)});
      }
  
      /**
       * Inserts or updates a media entry
       *
       * @return the id of the entry
       */
      public long setMedia(FeedMedia media) {
          ContentValues values = new ContentValues();
          values.put(KEY_DURATION, media.getDuration());
          values.put(KEY_POSITION, media.getPosition());
          values.put(KEY_SIZE, media.getSize());
          values.put(KEY_MIME_TYPE, media.getMimeType());
          values.put(KEY_DOWNLOAD_URL, media.getDownloadUrl());
          values.put(KEY_DOWNLOAD_DATE, media.getDownloadDate());
          values.put(KEY_FILE_URL, media.getLocalFileUrl());
          values.put(KEY_HAS_EMBEDDED_PICTURE, media.hasEmbeddedPicture());
          values.put(KEY_LAST_PLAYED_TIME_STATISTICS, media.getLastPlayedTimeStatistics());
  
          if (media.getLastPlayedTimeHistory() != null) {
              values.put(KEY_LAST_PLAYED_TIME_HISTORY, media.getLastPlayedTimeHistory().getTime());
          } else {
              values.put(KEY_LAST_PLAYED_TIME_HISTORY, 0);
          }
          if (media.getItem() != null) {
              values.put(KEY_FEEDITEM, media.getItem().getId());
          }
          if (media.getId() == 0) {
              media.setId(db.insert(TABLE_NAME_FEED_MEDIA, null, values));
          } else {
              db.update(TABLE_NAME_FEED_MEDIA, values, KEY_ID + "=?",
                      new String[]{String.valueOf(media.getId())});
          }
          return media.getId();
      }
  
      public void setFeedMediaPlaybackInformation(FeedMedia media) {
          if (media.getId() != 0) {
              ContentValues values = new ContentValues();
              values.put(KEY_POSITION, media.getPosition());
              values.put(KEY_DURATION, media.getDuration());
              values.put(KEY_PLAYED_DURATION, media.getPlayedDuration());
              values.put(KEY_LAST_PLAYED_TIME_STATISTICS, media.getLastPlayedTimeStatistics());
              values.put(KEY_LAST_PLAYED_TIME_HISTORY, media.getLastPlayedTimeHistory().getTime());
              db.update(TABLE_NAME_FEED_MEDIA, values, KEY_ID + "=?",
                      new String[]{String.valueOf(media.getId())});
          } else {
              Log.e(TAG, "setFeedMediaPlaybackInformation: ID of media was 0");
          }
      }
  
      public void setFeedMediaLastPlayedTimeHistory(FeedMedia media) {
          if (media.getId() != 0) {
              ContentValues values = new ContentValues();
              values.put(KEY_LAST_PLAYED_TIME_HISTORY, media.getLastPlayedTimeHistory().getTime());
              values.put(KEY_PLAYED_DURATION, media.getPlayedDuration());
              db.update(TABLE_NAME_FEED_MEDIA, values, KEY_ID + "=?",
                      new String[]{String.valueOf(media.getId())});
          } else {
              Log.e(TAG, "setFeedMediaLastPlayedTimeHistory: ID of media was 0");
          }
      }
  
      public void resetAllMediaPlayedDuration() {
          try {
              db.beginTransactionNonExclusive();
              ContentValues values = new ContentValues();
              values.put(KEY_PLAYED_DURATION, 0);
              db.update(TABLE_NAME_FEED_MEDIA, values, null, new String[0]);
              db.setTransactionSuccessful();
          } catch (SQLException e) {
              Log.e(TAG, Log.getStackTraceString(e));
          } finally {
              db.endTransaction();
          }
      }
  
      /**
       * Insert all FeedItems of a feed and the feed object itself in a single
       * transaction
       */
      public void setCompleteFeed(Feed... feeds) {
          try {
              db.beginTransactionNonExclusive();
              for (Feed feed : feeds) {
                  setFeed(feed);
                  if (feed.getItems() != null) {
                      for (FeedItem item : feed.getItems()) {
                          updateOrInsertFeedItem(item, false);
                      }
                  }
                  if (feed.getPreferences() != null) {
                      setFeedPreferences(feed.getPreferences());
                  }
              }
              db.setTransactionSuccessful();
          } catch (SQLException e) {
              Log.e(TAG, Log.getStackTraceString(e));
          } finally {
              db.endTransaction();
          }
      }
  
      /**
       * Updates the download URL of a Feed.
       */
      public void setFeedDownloadUrl(String original, String updated) {
          ContentValues values = new ContentValues();
          values.put(KEY_DOWNLOAD_URL, updated);
          db.update(TABLE_NAME_FEEDS, values, KEY_DOWNLOAD_URL + "=?", new String[]{original});
      }
  
      public void storeFeedItemlist(List<FeedItem> items) {
          try {
              db.beginTransactionNonExclusive();
              for (FeedItem item : items) {
                  updateOrInsertFeedItem(item, true);
              }
              db.setTransactionSuccessful();
          } catch (SQLException e) {
              Log.e(TAG, Log.getStackTraceString(e));
          } finally {
              db.endTransaction();
          }
      }
  
      public long setSingleFeedItem(FeedItem item) {
          long result = 0;
          try {
              db.beginTransactionNonExclusive();
              result = updateOrInsertFeedItem(item, true);
              db.setTransactionSuccessful();
          } catch (SQLException e) {
              Log.e(TAG, Log.getStackTraceString(e));
          } finally {
              db.endTransaction();
          }
          return result;
      }
  
      /**
       * Inserts or updates a feeditem entry
       *
       * @param item     The FeedItem
       * @param saveFeed true if the Feed of the item should also be saved. This should be set to
       *                 false if the method is executed on a list of FeedItems of the same Feed.
       * @return the id of the entry
       */
      private long updateOrInsertFeedItem(FeedItem item, boolean saveFeed) {
          if (item.getId() == 0 && item.getPubDate() == null) {
              Log.e(TAG, "Newly saved item has no pubDate. Using current date as pubDate");
              item.setPubDate(new Date());
          }
  
          ContentValues values = new ContentValues();
          values.put(KEY_TITLE, item.getTitle());
          values.put(KEY_LINK, item.getLink());
          if (item.getDescription() != null) {
              values.put(KEY_DESCRIPTION, item.getDescription());
          }
          values.put(KEY_PUBDATE, item.getPubDate().getTime());
          values.put(KEY_PAYMENT_LINK, item.getPaymentLink());
          if (saveFeed && item.getFeed() != null) {
              setFeed(item.getFeed());
          }
          values.put(KEY_FEED, item.getFeed().getId());
          if (item.isNew()) {
              values.put(KEY_READ, FeedItem.NEW);
          } else if (item.isPlayed()) {
              values.put(KEY_READ, FeedItem.PLAYED);
          } else {
              values.put(KEY_READ, FeedItem.UNPLAYED);
          }
          values.put(KEY_HAS_CHAPTERS, item.getChapters() != null || item.hasChapters());
          values.put(KEY_ITEM_IDENTIFIER, item.getItemIdentifier());
          values.put(KEY_AUTO_DOWNLOAD_ENABLED, item.isAutoDownloadEnabled());
          values.put(KEY_IMAGE_URL, item.getImageUrl());
          values.put(KEY_PODCASTINDEX_CHAPTER_URL, item.getPodcastIndexChapterUrl());
          values.put(KEY_SOCIAL_INTERACT_URL, item.getSocialInteractUrl());
  
          // We only store one transcript url, we prefer JSON if it exists
          String type = item.getTranscriptType();
          String url = item.getTranscriptUrl();
          if (url != null) {
              values.put(KEY_PODCASTINDEX_TRANSCRIPT_TYPE, type);
              values.put(KEY_PODCASTINDEX_TRANSCRIPT_URL, url);
          }
  
          if (item.getId() == 0) {
              item.setId(db.insert(TABLE_NAME_FEED_ITEMS, null, values));
          } else {
              db.update(TABLE_NAME_FEED_ITEMS, values, KEY_ID + "=?",
                      new String[]{String.valueOf(item.getId())});
          }
          if (item.getMedia() != null) {
              setMedia(item.getMedia());
              item.getMedia().setItemId(item.getId());
          }
          if (item.getChapters() != null) {
              setChapters(item);
          }
          return item.getId();
      }
  
      public void setFeedItemRead(FeedItem item, int played, boolean resetMediaPosition) {
          try {
              db.beginTransactionNonExclusive();
              ContentValues values = new ContentValues();
  
              values.put(KEY_READ, played);
              db.update(TABLE_NAME_FEED_ITEMS, values, KEY_ID + "=?", new String[]{String.valueOf(item.getId())});
              item.setPlayed(played == FeedItem.PLAYED);
  
              if (resetMediaPosition && item.hasMedia()) {
                  values.clear();
                  values.put(KEY_POSITION, 0);
                  db.update(TABLE_NAME_FEED_MEDIA, values, KEY_ID + "=?",
                          new String[]{String.valueOf(item.getMedia().getId())});
                  item.getMedia().setPosition(0);
              }
  
              db.setTransactionSuccessful();
          } catch (SQLException e) {
              Log.e(TAG, Log.getStackTraceString(e));
          } finally {
              db.endTransaction();
          }
      }
  
      /**
       * Sets the 'read' attribute of the item.
       *
       * @param read    must be one of FeedItem.PLAYED, FeedItem.NEW, FeedItem.UNPLAYED
       * @param itemIds items to change the value of
       */
      public void setFeedItemRead(int read, long... itemIds) {
          try {
              db.beginTransactionNonExclusive();
              ContentValues values = new ContentValues();
              for (long id : itemIds) {
                  values.clear();
                  values.put(KEY_READ, read);
                  db.update(TABLE_NAME_FEED_ITEMS, values, KEY_ID + "=?", new String[]{String.valueOf(id)});
              }
              db.setTransactionSuccessful();
          } catch (SQLException e) {
              Log.e(TAG, Log.getStackTraceString(e));
          } finally {
              db.endTransaction();
          }
      }
  
      private void setChapters(FeedItem item) {
          ContentValues values = new ContentValues();
          for (Chapter chapter : item.getChapters()) {
              values.put(KEY_TITLE, chapter.getTitle());
              values.put(KEY_START, chapter.getStart());
              values.put(KEY_FEEDITEM, item.getId());
              values.put(KEY_LINK, chapter.getLink());
              values.put(KEY_IMAGE_URL, chapter.getImageUrl());
              if (chapter.getId() == 0) {
                  chapter.setId(db.insert(TABLE_NAME_SIMPLECHAPTERS, null, values));
              } else {
                  db.update(TABLE_NAME_SIMPLECHAPTERS, values, KEY_ID + "=?",
                          new String[]{String.valueOf(chapter.getId())});
              }
          }
      }
  
      public void resetPagedFeedPage(Feed feed) {
          final String sql = "UPDATE " + TABLE_NAME_FEEDS
                  + " SET " + KEY_NEXT_PAGE_LINK + "=" + KEY_DOWNLOAD_URL
                  + " WHERE " + KEY_ID + "=" + feed.getId();
          db.execSQL(sql);
      }
  
      public void setFeedLastUpdateFailed(long feedId, boolean failed) {
          final String sql = "UPDATE " + TABLE_NAME_FEEDS
                  + " SET " + KEY_LAST_UPDATE_FAILED + "=" + (failed ? "1" : "0")
                  + "," + KEY_LAST_REFRESH_ATTEMPT + "=" + System.currentTimeMillis()
                  + " WHERE " + KEY_ID + "=" + feedId;
          db.execSQL(sql);
      }
  
      public void setFeedCustomTitle(long feedId, String customTitle) {
          ContentValues values = new ContentValues();
          values.put(KEY_CUSTOM_TITLE, customTitle);
          db.update(TABLE_NAME_FEEDS, values, KEY_ID + "=?", new String[]{String.valueOf(feedId)});
      }
  
      public void setFeedState(long feedId, int state) {
          ContentValues values = new ContentValues();
          values.put(KEY_STATE, state);
          db.update(TABLE_NAME_FEEDS, values, KEY_ID + "=?", new String[]{String.valueOf(feedId)});
      }
  
      /**
       * Inserts or updates a download status.
       */
      public long setDownloadStatus(DownloadResult status) {
          ContentValues values = new ContentValues();
          values.put(KEY_FEEDFILE, status.getFeedfileId());
          values.put(KEY_FEEDFILETYPE, status.getFeedfileType());
          values.put(KEY_REASON, status.getReason().getCode());
          values.put(KEY_SUCCESSFUL, status.isSuccessful());
          values.put(KEY_COMPLETION_DATE, status.getCompletionDate().getTime());
          values.put(KEY_REASON_DETAILED, status.getReasonDetailed());
          values.put(KEY_DOWNLOADSTATUS_TITLE, status.getTitle());
          if (status.getId() == 0) {
              status.setId(db.insert(TABLE_NAME_DOWNLOAD_LOG, null, values));
          } else {
              db.update(TABLE_NAME_DOWNLOAD_LOG, values, KEY_ID + "=?",
                      new String[]{String.valueOf(status.getId())});
          }
          return status.getId();
      }
  
      public void setFavorites(List<FeedItem> favorites) {
          ContentValues values = new ContentValues();
          try {
              db.beginTransactionNonExclusive();
              db.delete(TABLE_NAME_FAVORITES, null, null);
              for (int i = 0; i < favorites.size(); i++) {
                  FeedItem item = favorites.get(i);
                  values.put(KEY_ID, i);
                  values.put(KEY_FEEDITEM, item.getId());
                  values.put(KEY_FEED, item.getFeed().getId());
                  db.insertWithOnConflict(TABLE_NAME_FAVORITES, null, values, SQLiteDatabase.CONFLICT_REPLACE);
              }
              db.setTransactionSuccessful();
          } catch (SQLException e) {
              Log.e(TAG, Log.getStackTraceString(e));
          } finally {
              db.endTransaction();
          }
      }
  
      /**
       * Adds the item to favorites
       */
      public void addFavoriteItem(FeedItem item) {
          // don't add an item that's already there...
          if (isItemInFavorites(item)) {
              Log.d(TAG, "item already in favorites");
              return;
          }
          ContentValues values = new ContentValues();
          values.put(KEY_FEEDITEM, item.getId());
          values.put(KEY_FEED, item.getFeedId());
          db.insert(TABLE_NAME_FAVORITES, null, values);
      }
  
      public void removeFavoriteItem(FeedItem item) {
          db.execSQL("DELETE FROM " + TABLE_NAME_FAVORITES + " WHERE " + KEY_FEEDITEM + "=" + item.getId());
      }
  
      private boolean isItemInFavorites(FeedItem item) {
          String query = String.format(Locale.US, "SELECT %s from %s WHERE %s=%d",
                  KEY_ID, TABLE_NAME_FAVORITES, KEY_FEEDITEM, item.getId());
          Cursor c = db.rawQuery(query, null);
          int count = c.getCount();
          c.close();
          return count > 0;
      }
  
      public void setQueue(List<FeedItem> queue) {
          ContentValues values = new ContentValues();
          try {
              db.beginTransactionNonExclusive();
              db.delete(TABLE_NAME_QUEUE, null, null);
              for (int i = 0; i < queue.size(); i++) {
                  FeedItem item = queue.get(i);
                  values.put(KEY_ID, i);
                  values.put(KEY_FEEDITEM, item.getId());
                  values.put(KEY_FEED, item.getFeed().getId());
                  db.insertWithOnConflict(TABLE_NAME_QUEUE, null, values, SQLiteDatabase.CONFLICT_REPLACE);
              }
              db.setTransactionSuccessful();
          } catch (SQLException e) {
              Log.e(TAG, Log.getStackTraceString(e));
          } finally {
              db.endTransaction();
          }
      }
  
      public void clearQueue() {
          db.delete(TABLE_NAME_QUEUE, null, null);
      }
  
      /**
       * Remove the listed items and their FeedMedia entries.
       */
      public void removeFeedItems(@NonNull List<FeedItem> items) {
          try {
              StringBuilder mediaIds = new StringBuilder();
              StringBuilder itemIds = new StringBuilder();
              for (FeedItem item : items) {
                  if (item.getMedia() != null) {
                      if (mediaIds.length() != 0) {
                          mediaIds.append(",");
                      }
                      mediaIds.append(item.getMedia().getId());
                  }
                  if (itemIds.length() != 0) {
                      itemIds.append(",");
                  }
                  itemIds.append(item.getId());
              }
  
              db.beginTransactionNonExclusive();
              db.delete(TABLE_NAME_SIMPLECHAPTERS, KEY_FEEDITEM + " IN (" + itemIds + ")", null);
              db.delete(TABLE_NAME_DOWNLOAD_LOG, KEY_FEEDFILETYPE + "=" + FeedMedia.FEEDFILETYPE_FEEDMEDIA
                              + " AND " + KEY_FEEDFILE + " IN (" + mediaIds + ")", null);
              db.delete(TABLE_NAME_FEED_MEDIA, KEY_ID + " IN (" + mediaIds + ")", null);
              db.delete(TABLE_NAME_FEED_ITEMS, KEY_ID + " IN (" + itemIds + ")", null);
              db.delete(TABLE_NAME_FAVORITES, KEY_FEEDITEM + " IN (" + itemIds + ")", null);
              db.setTransactionSuccessful();
          } catch (SQLException e) {
              Log.e(TAG, Log.getStackTraceString(e));
          } finally {
              db.endTransaction();
          }
      }
  
      /**
       * Remove a feed with all its FeedItems and Media entries.
       */
      public void removeFeed(Feed feed) {
          try {
              db.beginTransactionNonExclusive();
              if (feed.getItems() != null) {
                  removeFeedItems(feed.getItems());
              }
              // delete download log entries for feed
              db.delete(TABLE_NAME_DOWNLOAD_LOG, KEY_FEEDFILE + "=? AND " + KEY_FEEDFILETYPE + "=?",
                      new String[]{String.valueOf(feed.getId()), String.valueOf(Feed.FEEDFILETYPE_FEED)});
  
              db.delete(TABLE_NAME_FEEDS, KEY_ID + "=?",
                      new String[]{String.valueOf(feed.getId())});
              db.setTransactionSuccessful();
          } catch (SQLException e) {
              Log.e(TAG, Log.getStackTraceString(e));
          } finally {
              db.endTransaction();
          }
      }
  
      public void clearPlaybackHistory() {
          ContentValues values = new ContentValues();
          values.put(KEY_LAST_PLAYED_TIME_HISTORY, 0);
          db.update(TABLE_NAME_FEED_MEDIA, values, null, null);
      }
  
      public void clearDownloadLog() {
          db.delete(TABLE_NAME_DOWNLOAD_LOG, null, null);
      }
  
      public void clearOldDownloadLog() {
          db.execSQL("DELETE FROM " + PodDBAdapter.TABLE_NAME_DOWNLOAD_LOG + " WHERE "
                  + PodDBAdapter.KEY_COMPLETION_DATE + "<" + (System.currentTimeMillis() - 7L * 24L * 3600L * 1000L));
      }
  
      /**
       * Get all Feeds from the Feed Table.
       *
       * @return The cursor of the query
       */
      public final Cursor getAllFeedsCursor() {
          final String query = "SELECT " + KEYS_FEED
                  + " FROM " + TABLE_NAME_FEEDS
                  + " ORDER BY " + TABLE_NAME_FEEDS + "." + KEY_TITLE + " COLLATE NOCASE ASC";
          return db.rawQuery(query, null);
      }
  
      public final Cursor getFeedCursorDownloadUrls() {
          return db.query(TABLE_NAME_FEEDS, new String[]{KEY_ID, KEY_DOWNLOAD_URL}, null, null, null, null, null);
      }
  
      /**
       * Returns a cursor with all FeedItems of a Feed. Uses FEEDITEM_SEL_FI_SMALL
       *
       * @param feed The feed you want to get the FeedItems from.
       * @return The cursor of the query
       */
      public final Cursor getItemsOfFeedCursor(final Feed feed, FeedItemFilter filter, SortOrder sortOrder,
                                               int offset, int limit) {
          String orderByQuery = FeedItemSortQuery.generateFrom(sortOrder);
          String filterQuery = FeedItemFilterQuery.generateFrom(filter);
          String whereClauseAnd = "".equals(filterQuery) ? "" : " AND " + filterQuery;
          final String query = SELECT_FEED_ITEMS_AND_MEDIA
                  + " WHERE " + TABLE_NAME_FEED_ITEMS + "." + KEY_FEED + "=" + feed.getId()
                  + whereClauseAnd
                  + " ORDER BY " + orderByQuery
                  + " LIMIT " + offset + ", " + limit;
          return db.rawQuery(query, null);
      }
  
      /**
       * Return the description and content_encoded of item
       */
      public final Cursor getDescriptionOfItem(final FeedItem item) {
          final String query = "SELECT " + KEY_DESCRIPTION
                  + " FROM " + TABLE_NAME_FEED_ITEMS
                  + " WHERE " + KEY_ID + "=" + item.getId();
          return db.rawQuery(query, null);
      }
  
      public final Cursor getSimpleChaptersOfFeedItemCursor(final FeedItem item) {
          return db.query(TABLE_NAME_SIMPLECHAPTERS, null, KEY_FEEDITEM
                          + "=?", new String[]{String.valueOf(item.getId())}, null,
                  null, null
          );
      }
  
      public final Cursor getDownloadLog(final int feedFileType, final long feedFileId, final long limit) {
          final String query = "SELECT * FROM " + TABLE_NAME_DOWNLOAD_LOG +
                  " WHERE " + KEY_FEEDFILE + "=" + feedFileId + " AND " + KEY_FEEDFILETYPE + "=" + feedFileType
                  + " ORDER BY " + KEY_COMPLETION_DATE + " DESC LIMIT " + limit;
          return db.rawQuery(query, null);
      }
  
      public final Cursor getDownloadLogCursor(final int limit) {
          return db.query(TABLE_NAME_DOWNLOAD_LOG, null, null, null, null,
                  null, KEY_COMPLETION_DATE + " DESC LIMIT " + limit);
      }
  
      /**
       * Returns a cursor which contains all feed items in the queue. The returned
       * cursor uses the FEEDITEM_SEL_FI_SMALL selection.
       * cursor uses the FEEDITEM_SEL_FI_SMALL selection.
       */
      public final Cursor getQueueCursor() {
          final String query = "SELECT " + KEYS_FEED_ITEM_WITHOUT_DESCRIPTION + ", " + KEYS_FEED_MEDIA
                  + " FROM " + TABLE_NAME_QUEUE
                  + " INNER JOIN " + TABLE_NAME_FEED_ITEMS
                  + " ON " + SELECT_KEY_ITEM_ID + " = " + TABLE_NAME_QUEUE + "." + KEY_FEEDITEM
                  +  JOIN_FEED_ITEM_AND_MEDIA
                  + " ORDER BY " + TABLE_NAME_QUEUE + "." + KEY_ID;
          return db.rawQuery(query, null);
      }
  
      public Cursor getQueueIDCursor() {
          return db.query(TABLE_NAME_QUEUE, new String[]{KEY_FEEDITEM}, null, null, null, null, KEY_ID + " ASC", null);
      }
  
      public Cursor getNextInQueue(final FeedItem item) {
          final String query = "SELECT " + KEYS_FEED_ITEM_WITHOUT_DESCRIPTION + ", " + KEYS_FEED_MEDIA
                  + " FROM " + TABLE_NAME_QUEUE
                  + " INNER JOIN " + TABLE_NAME_FEED_ITEMS
                  + " ON " + SELECT_KEY_ITEM_ID + " = " + TABLE_NAME_QUEUE + "." + KEY_FEEDITEM
                  +  JOIN_FEED_ITEM_AND_MEDIA
                  + " WHERE Queue.ID > (SELECT Queue.ID FROM Queue WHERE Queue.FeedItem = "
                  +  item.getId()
                  + ")"
                  + " ORDER BY Queue.ID"
                  + " LIMIT 1";
          return db.rawQuery(query, null);
      }
  
      public final Cursor getPausedQueueCursor(int limit) {
          final String hasPositionOrRecentlyPlayed = TABLE_NAME_FEED_MEDIA + "."  + KEY_POSITION + " >= 1000"
                  + " OR " + TABLE_NAME_FEED_MEDIA + "." + KEY_LAST_PLAYED_TIME_STATISTICS
                  + " >= " + (System.currentTimeMillis() - 30000);
          final String query = "SELECT " + KEYS_FEED_ITEM_WITHOUT_DESCRIPTION + ", " + KEYS_FEED_MEDIA
                  + " FROM " + TABLE_NAME_QUEUE
                  + " INNER JOIN " + TABLE_NAME_FEED_ITEMS
                  + " ON " + SELECT_KEY_ITEM_ID + " = " + TABLE_NAME_QUEUE + "." + KEY_FEEDITEM
                  +  JOIN_FEED_ITEM_AND_MEDIA
                  + " ORDER BY (CASE WHEN " + hasPositionOrRecentlyPlayed + " THEN "
                      + TABLE_NAME_FEED_MEDIA + "." + KEY_LAST_PLAYED_TIME_STATISTICS + " ELSE 0 END) DESC , "
                  + TABLE_NAME_QUEUE + "." + KEY_ID
                  + " LIMIT " + limit;
          return db.rawQuery(query, null);
      }
  
      public final Cursor getFavoritesIdsCursor() {
          final String query = "SELECT " + TABLE_NAME_FAVORITES + "." + KEY_FEEDITEM
                  + " FROM " + TABLE_NAME_FAVORITES;
          return db.rawQuery(query, null);
      }
  
      public void setFeedItems(int oldState, int newState) {
          setFeedItems(oldState, newState, 0);
      }
  
      public void setFeedItems(int oldState, int newState, long feedId) {
          String sql = "UPDATE " + TABLE_NAME_FEED_ITEMS + " SET " + KEY_READ + "=" + newState;
          if (feedId > 0) {
              sql += " WHERE " + KEY_FEED + "=" + feedId;
          }
          if (FeedItem.NEW <= oldState && oldState <= FeedItem.PLAYED) {
              sql += feedId > 0 ? " AND " : " WHERE ";
              sql += KEY_READ + "=" + oldState;
          }
          db.execSQL(sql);
      }
  
      public final Cursor getEpisodesCursor(int offset, int limit, FeedItemFilter filter, SortOrder sortOrder) {
          String orderByQuery = FeedItemSortQuery.generateFrom(sortOrder);
          String filterQuery = FeedItemFilterQuery.generateFrom(filter);
          String whereClause = "".equals(filterQuery) ? "" : " WHERE " + filterQuery;
          final String query = SELECT_FEED_ITEMS_AND_MEDIA + whereClause
                  + "ORDER BY " +  orderByQuery + " LIMIT " + offset + ", " + limit;
          return db.rawQuery(query, null);
      }
  
      public final Cursor getEpisodeCountCursor(FeedItemFilter filter) {
          String filterQuery = FeedItemFilterQuery.generateFrom(filter);
          String whereClause = "".equals(filterQuery) ? "" : " WHERE " + filterQuery;
          final String query = "SELECT count(" + TABLE_NAME_FEED_ITEMS + "." + KEY_ID + ") FROM " + TABLE_NAME_FEED_ITEMS
                  + JOIN_FEED_ITEM_AND_MEDIA + whereClause;
          return db.rawQuery(query, null);
      }
  
      public final Cursor getFeedEpisodeCountCursor(long feedId, FeedItemFilter filter) {
          String filterQuery = FeedItemFilterQuery.generateFrom(filter);
          String whereAndClause = "".equals(filterQuery) ? "" : " AND " + filterQuery;
          final String query = "SELECT count(" + TABLE_NAME_FEED_ITEMS + "." + KEY_ID + ") FROM " + TABLE_NAME_FEED_ITEMS
                  + JOIN_FEED_ITEM_AND_MEDIA
                  + " WHERE " + TABLE_NAME_FEED_ITEMS + "." + KEY_FEED + "=" + feedId + whereAndClause;
          return db.rawQuery(query, null);
      }
  
      public Cursor getRandomEpisodesCursor(int limit, int seed) {
          long oneHourAgo = System.currentTimeMillis() - 1000L * 3600L;
          final String allItems = SELECT_FEED_ITEMS_AND_MEDIA
                  + " WHERE (" + KEY_READ + " = " + FeedItem.NEW + " OR " + KEY_READ + " = " + FeedItem.UNPLAYED + ") "
                      // Only from the last two years. Older episodes often contain broken covers and stuff like that
                      + " AND " + KEY_PUBDATE + " > " + (System.currentTimeMillis() - 1000L * 3600L * 24L * 356L * 2)
                      // Hide episodes that have been played but not completed
                      + " AND (" + KEY_LAST_PLAYED_TIME_STATISTICS + " == 0"
                          + " OR " + KEY_LAST_PLAYED_TIME_STATISTICS + " > " + oneHourAgo + ")"
                      + " AND " + SELECT_WHERE_FEED_IS_SUBSCRIBED;
          final String query = "SELECT MAX(" + randomEpisodeNumber(seed) + "), * FROM (" + allItems + ")"
                  + " GROUP BY " + KEY_FEED
                  + " ORDER BY " + randomEpisodeNumber(seed * 3) + " DESC LIMIT " + limit;
          return db.rawQuery(query, null);
      }
  
      /**
       * SQLite does not support random seeds. Create our own "random" number based on that seed and the item ID
       */
      private String randomEpisodeNumber(int seed) {
          return "((" + SELECT_KEY_ITEM_ID + " * " + seed + ") % 46471)";
      }
  
      public final Cursor getFeedItemFromMediaIdCursor(long mediaId) {
          final String query = SELECT_FEED_ITEMS_AND_MEDIA
                  + " WHERE " + SELECT_KEY_MEDIA_ID + " = " + mediaId;
          return db.rawQuery(query, null);
      }
  
      public final Cursor getFeedCursor(final long id) {
          final String query = "SELECT " + KEYS_FEED
                  + " FROM " + TABLE_NAME_FEEDS
                  + " WHERE " + SELECT_KEY_FEED_ID + " = " + id;
          return db.rawQuery(query, null);
      }
  
      public final Cursor getFeedItemCursor(final String id) {
          return getFeedItemCursor(new String[]{id});
      }
  
      public final Cursor getFeedItemCursor(final String[] ids) {
          if (ids.length > IN_OPERATOR_MAXIMUM) {
              throw new IllegalArgumentException("number of IDs must not be larger than " + IN_OPERATOR_MAXIMUM);
          }
          final String query = SELECT_FEED_ITEMS_AND_MEDIA
                  + " WHERE " + SELECT_KEY_ITEM_ID + " IN (" + TextUtils.join(",", ids) + ")";
          return db.rawQuery(query, null);
      }
  
      public final Cursor getFeedItemCursorByUrl(List<String> urls) {
          if (urls.size() > IN_OPERATOR_MAXIMUM) {
              throw new IllegalArgumentException("number of IDs must not be larger than " + IN_OPERATOR_MAXIMUM);
          }
          StringBuilder urlsString = new StringBuilder();
          for (int i = 0; i < urls.size(); i++) {
              if (i != 0) {
                  urlsString.append(",");
              }
              urlsString.append(DatabaseUtils.sqlEscapeString(urls.get(i)));
          }
          final String query = SELECT_FEED_ITEMS_AND_MEDIA
                  + " WHERE " + KEY_DOWNLOAD_URL + " IN (" + urlsString + ")"
                  + " ORDER BY " + KEY_LAST_PLAYED_TIME_HISTORY + " DESC";
          return db.rawQuery(query, null);
      }
  
      public final Cursor getFeedItemCursor(final String guid, final String episodeUrl) {
          String escapedEpisodeUrl = DatabaseUtils.sqlEscapeString(episodeUrl);
          String whereClauseCondition = TABLE_NAME_FEED_MEDIA + "." + KEY_DOWNLOAD_URL + "=" + escapedEpisodeUrl;
  
          if (guid != null) {
              String escapedGuid = DatabaseUtils.sqlEscapeString(guid);
              whereClauseCondition = TABLE_NAME_FEED_ITEMS + "." + KEY_ITEM_IDENTIFIER + "=" + escapedGuid;
          }
  
          final String query = SELECT_FEED_ITEMS_AND_MEDIA
                  + " INNER JOIN " + TABLE_NAME_FEEDS
                  + " ON " + TABLE_NAME_FEED_ITEMS + "." + KEY_FEED + "=" + TABLE_NAME_FEEDS + "." + KEY_ID
                  + " WHERE " + whereClauseCondition;
          return db.rawQuery(query, null);
      }
  
      public final Cursor getMonthlyStatisticsCursor() {
          final String query = "SELECT SUM(" + KEY_PLAYED_DURATION + ") AS total_duration"
                  + ", strftime('%m', datetime(" + KEY_LAST_PLAYED_TIME_STATISTICS + "/1000, 'unixepoch')) AS month"
                  + ", strftime('%Y', datetime(" + KEY_LAST_PLAYED_TIME_STATISTICS + "/1000, 'unixepoch')) AS year"
                  + " FROM " + TABLE_NAME_FEED_MEDIA
                  + " WHERE " + KEY_LAST_PLAYED_TIME_STATISTICS + " > 0 AND " + KEY_PLAYED_DURATION + " > 0"
                  + " GROUP BY year, month"
                  + " ORDER BY year, month";
          return db.rawQuery(query, null);
      }
  
      public final Cursor getFeedStatisticsCursor(boolean includeMarkedAsPlayed, long timeFilterFrom,
                                                  long timeFilterTo, long sixMonthsAgo) {
          final String lastPlayedTimeStatistics = TABLE_NAME_FEED_MEDIA + "." + KEY_LAST_PLAYED_TIME_STATISTICS;
          String wasStarted = TABLE_NAME_FEED_MEDIA + "." + KEY_LAST_PLAYED_TIME_HISTORY + " > 0"
                  + " AND " + TABLE_NAME_FEED_MEDIA + "." + KEY_PLAYED_DURATION + " > 0";
          if (includeMarkedAsPlayed) {
              wasStarted = "(" + wasStarted + ") OR "
                      + TABLE_NAME_FEED_ITEMS + "." + KEY_READ + "=" + FeedItem.PLAYED + " OR "
                      + TABLE_NAME_FEED_MEDIA + "." + KEY_POSITION + "> 0";
          }
          final String timeFilter = lastPlayedTimeStatistics + ">=" + timeFilterFrom
                  + " AND " + lastPlayedTimeStatistics + "<" + timeFilterTo;
          String playedTime = TABLE_NAME_FEED_MEDIA + "." + KEY_PLAYED_DURATION;
          if (includeMarkedAsPlayed) {
              playedTime = "(CASE WHEN " + playedTime + " != 0"
                      + " THEN " + playedTime + " ELSE ("
                              + "CASE WHEN " + TABLE_NAME_FEED_ITEMS + "." + KEY_READ + "=" + FeedItem.PLAYED
                                  + " THEN " + TABLE_NAME_FEED_MEDIA + "." + KEY_DURATION + " ELSE 0 END"
                      + ") END)";
          }
  
          final String query = "SELECT " + KEYS_FEED + ", "
                          + "COUNT(*) AS num_episodes, "
                          + "MIN(CASE WHEN " + lastPlayedTimeStatistics + " > 0"
                                  + " THEN " + lastPlayedTimeStatistics
                                  + " ELSE " + Long.MAX_VALUE + " END) AS oldest_date, "
                          + "SUM(CASE WHEN (" + wasStarted + ") THEN 1 ELSE 0 END) AS episodes_started, "
                          + "IFNULL(SUM(CASE WHEN (" + timeFilter + ")"
                                  + " THEN (" + playedTime + ") ELSE 0 END), 0) AS played_time, "
                          + "IFNULL(SUM(" + TABLE_NAME_FEED_MEDIA + "." + KEY_DURATION + "), 0) AS total_time, "
                          + "SUM(CASE WHEN " + TABLE_NAME_FEED_MEDIA + "." + KEY_DOWNLOAD_DATE + " > 0"
                                  + " THEN 1 ELSE 0 END) AS num_downloaded, "
                          + "SUM(CASE WHEN " + TABLE_NAME_FEED_MEDIA + "." + KEY_DOWNLOAD_DATE + " > 0"
                                  + " THEN " + TABLE_NAME_FEED_MEDIA + "." + KEY_SIZE + " ELSE 0 END) AS download_size, "
                          + "SUM(CASE WHEN " + TABLE_NAME_FEED_ITEMS + "." + KEY_READ + " != " + FeedItem.PLAYED
                                  + " AND " + TABLE_NAME_FEED_ITEMS + "." + KEY_PUBDATE + " >= " + sixMonthsAgo
                                  + " THEN 1 ELSE 0 END) AS num_recent_unplayed "
                  + " FROM " + TABLE_NAME_FEED_ITEMS
                  + JOIN_FEED_ITEM_AND_MEDIA
                  + " INNER JOIN " + TABLE_NAME_FEEDS
                  + " ON " + TABLE_NAME_FEED_ITEMS + "." + KEY_FEED + "=" + TABLE_NAME_FEEDS + "." + KEY_ID
                  + " WHERE " + TABLE_NAME_FEEDS + "." + KEY_STATE + "=" + Feed.STATE_SUBSCRIBED
                  + " GROUP BY " + TABLE_NAME_FEEDS + "." + KEY_ID;
          return db.rawQuery(query, null);
      }
  
      public final Cursor getTimeBetweenReleaseAndPlayback(long timeFilterFrom, long timeFilterTo) {
          final String from = " FROM " + TABLE_NAME_FEED_ITEMS
                  + JOIN_FEED_ITEM_AND_MEDIA
                  + " WHERE " + TABLE_NAME_FEED_MEDIA + "." + KEY_LAST_PLAYED_TIME_STATISTICS + ">=" + timeFilterFrom
                          + " AND " + TABLE_NAME_FEED_ITEMS + "." + KEY_PUBDATE + ">=" + timeFilterFrom
                          + " AND " + TABLE_NAME_FEED_MEDIA + "." + KEY_LAST_PLAYED_TIME_STATISTICS + "<" + timeFilterTo;
          final String query = "SELECT " + TABLE_NAME_FEED_MEDIA + "." + KEY_LAST_PLAYED_TIME_STATISTICS
                  + " - " + TABLE_NAME_FEED_ITEMS + "." + KEY_PUBDATE + " AS diff"
                  + from
                  + " ORDER BY diff ASC"
                  + " LIMIT 1"
                  + " OFFSET (SELECT count(*)/2 " + from + ")";
          return db.rawQuery(query, null);
      }
  
      public int getQueueSize() {
          final String query = String.format("SELECT COUNT(%s) FROM %s", KEY_ID, TABLE_NAME_QUEUE);
          Cursor c = db.rawQuery(query, null);
          int result = 0;
          if (c.moveToFirst()) {
              result = c.getInt(0);
          }
          c.close();
          return result;
      }
  
      public final Map<Long, Integer> getFeedCounters(FeedCounter setting, long... feedIds) {
          String whereRead;
          switch (setting) {
              case SHOW_NEW:
                  whereRead = KEY_READ + "=" + FeedItem.NEW;
                  break;
              case SHOW_UNPLAYED:
                  whereRead = "(" + KEY_READ + "=" + FeedItem.NEW
                          + " OR " + KEY_READ + "=" + FeedItem.UNPLAYED + ")";
                  break;
              case SHOW_DOWNLOADED:
                  whereRead = KEY_DOWNLOAD_DATE + ">0";
                  break;
              case SHOW_DOWNLOADED_UNPLAYED:
                  whereRead = "(" + KEY_READ + "=" + FeedItem.NEW
                          + " OR " + KEY_READ + "=" + FeedItem.UNPLAYED + ")"
                          + " AND " + KEY_DOWNLOAD_DATE + ">0";
                  break;
              case SHOW_NONE:
                  // deliberate fall-through
              default: // NONE
                  return new HashMap<>();
          }
          return conditionalFeedCounterRead(whereRead, feedIds);
      }
  
      private Map<Long, Integer> conditionalFeedCounterRead(String whereRead, long... feedIds) {
          String limitFeeds;
          if (feedIds.length > 0) {
              // work around TextUtils.join wanting only boxed items
              // and StringUtils.join() causing NoSuchMethodErrors on MIUI
              StringBuilder builder = new StringBuilder();
              for (long id : feedIds) {
                  builder.append(id);
                  builder.append(',');
              }
              // there's an extra ',', get rid of it
              builder.deleteCharAt(builder.length() - 1);
              limitFeeds = KEY_FEED + " IN (" + builder.toString() + ") AND ";
          } else {
              limitFeeds = SELECT_WHERE_FEED_IS_SUBSCRIBED + " AND ";
          }
  
          final String query = "SELECT " + KEY_FEED + ", COUNT(" + TABLE_NAME_FEED_ITEMS + "." + KEY_ID + ") AS count "
                  + " FROM " + TABLE_NAME_FEED_ITEMS
                  + " LEFT JOIN " + TABLE_NAME_FEED_MEDIA + " ON "
                  + TABLE_NAME_FEED_ITEMS + "." + KEY_ID + "=" + TABLE_NAME_FEED_MEDIA + "." + KEY_FEEDITEM
                  + " WHERE " + limitFeeds + " "
                  + whereRead + " GROUP BY " + KEY_FEED;
  
          Cursor c = db.rawQuery(query, null);
          Map<Long, Integer> result = new HashMap<>();
          if (c.moveToFirst()) {
              do {
                  long feedId = c.getLong(0);
                  int count = c.getInt(1);
                  result.put(feedId, count);
              } while (c.moveToNext());
          }
          c.close();
          return result;
      }
  
      public final Map<Long, Integer> getPlayedEpisodesCounters(long... feedIds) {
          String whereRead = KEY_READ + "=" + FeedItem.PLAYED;
          return conditionalFeedCounterRead(whereRead, feedIds);
      }
  
      public final Map<Long, Long> getMostRecentItemDates() {
          final String query = "SELECT " + KEY_FEED + ","
                  + " MAX(" + TABLE_NAME_FEED_ITEMS + "." + KEY_PUBDATE + ") AS most_recent_pubdate"
                  + " FROM " + TABLE_NAME_FEED_ITEMS
                  + " GROUP BY " + KEY_FEED;
  
          Cursor c = db.rawQuery(query, null);
          Map<Long, Long> result = new HashMap<>();
          if (c.moveToFirst()) {
              do {
                  long feedId = c.getLong(0);
                  long date = c.getLong(1);
                  result.put(feedId, date);
              } while (c.moveToNext());
          }
          c.close();
          return result;
      }
  
      /**
       * Uses DatabaseUtils to escape a search query and removes ' at the
       * beginning and the end of the string returned by the escape method.
       */
      private String[] prepareSearchQuery(String query) {
          String[] queryWords = query.split("\\s+");
          for (int i = 0; i < queryWords.length; ++i) {
              StringBuilder builder = new StringBuilder();
              DatabaseUtils.appendEscapedSQLString(builder, queryWords[i]);
              builder.deleteCharAt(0);
              builder.deleteCharAt(builder.length() - 1);
              queryWords[i] = builder.toString();
          }
  
          return queryWords;
      }
  
      /**
       * Searches for the given query in various values of all items or the items
       * of a specified feed.
       *
       * @return A cursor with all search results in SEL_FI_EXTRA selection.
       */
      public Cursor searchItems(long feedID, String searchQuery) {
          String[] queryWords = prepareSearchQuery(searchQuery);
  
          String queryFeedId;
          if (feedID != 0) {
              // search items in specific feed
              queryFeedId = KEY_FEED + " = " + feedID;
          } else {
              // search through all items
              queryFeedId = "1 = 1";
          }
  
          String queryStart = SELECT_FEED_ITEMS_AND_MEDIA_WITH_DESCRIPTION
                  + " WHERE " + queryFeedId + " AND " + SELECT_WHERE_FEED_IS_SUBSCRIBED + " AND (";
          StringBuilder sb = new StringBuilder(queryStart);
  
          for (int i = 0; i < queryWords.length; i++) {
              sb
                      .append("(")
                      .append(KEY_DESCRIPTION + " LIKE '%").append(queryWords[i])
                      .append("%' OR ")
                      .append(KEY_TITLE).append(" LIKE '%").append(queryWords[i])
                      .append("%') ");
  
              if (i != queryWords.length - 1) {
                  sb.append("AND ");
              }
          }
  
          sb.append(") ORDER BY " + KEY_PUBDATE + " DESC LIMIT 300");
  
          return db.rawQuery(sb.toString(), null);
      }
  
      /**
       * Searches for the given query in various values of all feeds.
       *
       * @return A cursor with all search results in SEL_FI_EXTRA selection.
       */
      public Cursor searchFeeds(String searchQuery) {
          String[] queryWords = prepareSearchQuery(searchQuery);
  
          String queryStart = "SELECT " + KEYS_FEED + " FROM " + TABLE_NAME_FEEDS
                  + " WHERE " + KEY_STATE + " = " + Feed.STATE_SUBSCRIBED;
          StringBuilder sb = new StringBuilder(queryStart);
  
          for (int i = 0; i < queryWords.length; i++) {
              sb
                      .append(" AND (")
                      .append(KEY_TITLE).append(" LIKE '%").append(queryWords[i])
                      .append("%' OR ")
                      .append(KEY_CUSTOM_TITLE).append(" LIKE '%").append(queryWords[i])
                      .append("%' OR ")
                      .append(KEY_AUTHOR).append(" LIKE '%").append(queryWords[i])
                      .append("%' OR ")
                      .append(KEY_DESCRIPTION).append(" LIKE '%").append(queryWords[i])
                      .append("%') ");
          }
  
          sb.append(" ORDER BY " + KEY_TITLE + " ASC LIMIT 300");
  
          return db.rawQuery(sb.toString(), null);
      }
  
      /**
       * Insert raw data to the database.
       * Call method only for unit tests.
       */
      @VisibleForTesting(otherwise = VisibleForTesting.NONE)
      public void insertTestData(@NonNull String table, @NonNull ContentValues values) {
          db.insert(table, null, values);
      }
  
      /**
       * Called when a database corruption happens.
       */
      public static class PodDbErrorHandler implements DatabaseErrorHandler {
          @Override
          public void onCorruption(SQLiteDatabase db) {
              Log.e(TAG, "Database corrupted: " + db.getPath());
  
              File dbPath = new File(db.getPath());
              File backupFolder = PodDBAdapter.context.getExternalFilesDir(null);
              File backupFile = new File(backupFolder, "CorruptedDatabaseBackup.db");
              try {
                  FileUtils.copyFile(dbPath, backupFile);
                  Log.d(TAG, "Dumped database to " + backupFile.getPath());
              } catch (IOException e) {
                  Log.d(TAG, Log.getStackTraceString(e));
              }
  
              new DefaultDatabaseErrorHandler().onCorruption(db); // This deletes the database
          }
      }
  
      /**
       * Helper class for opening the Antennapod database.
       */
      private static class PodDBHelper extends SQLiteOpenHelper {
          /**
           * Constructor.
           *
           * @param context Context to use
           * @param name    Name of the database
           * @param factory to use for creating cursor objects
           */
          public PodDBHelper(final Context context, final String name, final CursorFactory factory) {
              super(context, name, factory, VERSION, new PodDbErrorHandler());
          }
  
          @Override
          public void onCreate(final SQLiteDatabase db) {
              db.execSQL(CREATE_TABLE_FEEDS);
              db.execSQL(CREATE_TABLE_FEED_ITEMS);
              db.execSQL(CREATE_TABLE_FEED_MEDIA);
              db.execSQL(CREATE_TABLE_DOWNLOAD_LOG);
              db.execSQL(CREATE_TABLE_QUEUE);
              db.execSQL(CREATE_TABLE_SIMPLECHAPTERS);
              db.execSQL(CREATE_TABLE_FAVORITES);
  
              db.execSQL(CREATE_INDEX_FEEDITEMS_FEED);
              db.execSQL(CREATE_INDEX_FEEDITEMS_PUBDATE);
              db.execSQL(CREATE_INDEX_FEEDITEMS_READ);
              db.execSQL(CREATE_INDEX_FEEDMEDIA_FEEDITEM);
              db.execSQL(CREATE_INDEX_QUEUE_FEEDITEM);
              db.execSQL(CREATE_INDEX_SIMPLECHAPTERS_FEEDITEM);
          }
  
          @Override
          public void onUpgrade(final SQLiteDatabase db, final int oldVersion, final int newVersion) {
              Log.w("DBAdapter", "Upgrading from version " + oldVersion + " to " + newVersion + ".");
              DBUpgrader.upgrade(db, oldVersion, newVersion);
          }
      }
  }
  