mirror of
https://github.com/jellyfin/jellyfin.git
synced 2024-09-06 11:34:57 +02:00
139 lines
4.7 KiB
C#
139 lines
4.7 KiB
C#
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using MediaBrowser.Controller.Entities;
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using System;
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using System.Collections.Generic;
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using System.ComponentModel.Composition;
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using System.Data;
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using System.IO;
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using System.Threading;
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using System.Threading.Tasks;
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namespace MediaBrowser.Controller.Persistence.SQLite
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{
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/// <summary>
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/// Class SQLiteUserDataRepository
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/// </summary>
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[Export(typeof(IUserDataRepository))]
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public class SQLiteUserDataRepository : SqliteRepository, IUserDataRepository
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{
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/// <summary>
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/// The repository name
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/// </summary>
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public const string RepositoryName = "SQLite";
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/// <summary>
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/// Gets the name of the repository
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/// </summary>
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/// <value>The name.</value>
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public string Name
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{
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get
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{
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return RepositoryName;
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}
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}
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/// <summary>
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/// Opens the connection to the database
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/// </summary>
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/// <returns>Task.</returns>
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public async Task Initialize()
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{
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var dbFile = Path.Combine(Kernel.Instance.ApplicationPaths.DataPath, "userdata.db");
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await ConnectToDB(dbFile).ConfigureAwait(false);
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string[] queries = {
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"create table if not exists user_data (item_id GUID, user_id GUID, data BLOB)",
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"create unique index if not exists idx_user_data on user_data (item_id, user_id)",
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"create table if not exists schema_version (table_name primary key, version)",
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//pragmas
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"pragma temp_store = memory"
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};
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RunQueries(queries);
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}
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/// <summary>
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/// Save the user specific data associated with an item in the repo
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/// </summary>
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/// <param name="item">The item.</param>
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/// <param name="cancellationToken">The cancellation token.</param>
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/// <returns>Task.</returns>
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/// <exception cref="System.ArgumentNullException">item</exception>
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public Task SaveUserData(BaseItem item, CancellationToken cancellationToken)
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{
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if (item == null)
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{
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throw new ArgumentNullException("item");
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}
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if (cancellationToken == null)
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{
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throw new ArgumentNullException("cancellationToken");
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}
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return Task.Run(() =>
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{
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cancellationToken.ThrowIfCancellationRequested();
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var cmd = connection.CreateCommand();
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cmd.CommandText = "delete from user_data where item_id = @guid";
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cmd.AddParam("@guid", item.UserDataId);
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QueueCommand(cmd);
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if (item.UserData != null)
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{
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foreach (var data in item.UserData)
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{
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cmd = connection.CreateCommand();
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cmd.CommandText = "insert into user_data (item_id, user_id, data) values (@1, @2, @3)";
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cmd.AddParam("@1", item.UserDataId);
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cmd.AddParam("@2", data.UserId);
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cmd.AddParam("@3", Kernel.Instance.ProtobufSerializer.SerializeToBytes(data));
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QueueCommand(cmd);
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}
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}
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});
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}
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/// <summary>
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/// Gets user data for an item
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/// </summary>
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/// <param name="item">The item.</param>
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/// <returns>IEnumerable{UserItemData}.</returns>
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/// <exception cref="System.ArgumentNullException"></exception>
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public IEnumerable<UserItemData> RetrieveUserData(BaseItem item)
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{
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if (item == null)
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{
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throw new ArgumentNullException("item");
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}
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var cmd = connection.CreateCommand();
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cmd.CommandText = "select data from user_data where item_id = @guid";
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var guidParam = cmd.Parameters.Add("@guid", DbType.Guid);
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guidParam.Value = item.UserDataId;
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using (var reader = cmd.ExecuteReader(CommandBehavior.SequentialAccess | CommandBehavior.SingleResult))
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{
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while (reader.Read())
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{
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using (var stream = GetStream(reader, 0))
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{
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var data = Kernel.Instance.ProtobufSerializer.DeserializeFromStream<UserItemData>(stream);
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if (data != null)
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{
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yield return data;
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}
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}
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}
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}
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}
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}
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}
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