add activity log feature

1 files changed, 293 insertions, 0 deletions

diff --git a/MediaBrowser.Server.Implementations/Activity/ActivityRepository.cs b/MediaBrowser.Server.Implementations/Activity/ActivityRepository.cs
new file mode 100644
index 000000000..787cbcc5b
--- /dev/null
+++ b/MediaBrowser.Server.Implementations/Activity/ActivityRepository.cs
@@ -0,0 +1,293 @@
+using MediaBrowser.Controller;
+using MediaBrowser.Controller.Activity;
+using MediaBrowser.Model.Activity;
+using MediaBrowser.Model.Logging;
+using MediaBrowser.Model.Querying;
+using MediaBrowser.Server.Implementations.Persistence;
+using System;
+using System.Collections.Generic;
+using System.Data;
+using System.Globalization;
+using System.IO;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace MediaBrowser.Server.Implementations.Activity
+{
+    public class ActivityRepository : IActivityRepository, IDisposable
+    {
+        private IDbConnection _connection;
+        private readonly ILogger _logger;
+        private readonly SemaphoreSlim _writeLock = new SemaphoreSlim(1, 1);
+        private readonly IServerApplicationPaths _appPaths;
+        private readonly CultureInfo _usCulture = new CultureInfo("en-US");
+
+        private IDbCommand _saveActivityCommand;
+
+        public ActivityRepository(ILogger logger, IServerApplicationPaths appPaths)
+        {
+            _logger = logger;
+            _appPaths = appPaths;
+        }
+
+        public async Task Initialize()
+        {
+            var dbFile = Path.Combine(_appPaths.DataPath, "activitylog.db");
+
+            _connection = await SqliteExtensions.ConnectToDb(dbFile, _logger).ConfigureAwait(false);
+
+            string[] queries = {
+
+                                "create table if not exists ActivityLogEntries (Id GUID PRIMARY KEY, Name TEXT, Overview TEXT, ShortOverview TEXT, Type TEXT, ItemId TEXT, UserId TEXT, DateCreated DATETIME, LogSeverity TEXT)",
+                                "create index if not exists idx_ActivityLogEntries on ActivityLogEntries(Id)",
+
+                                //pragmas
+                                "pragma temp_store = memory",
+
+                                "pragma shrink_memory"
+                               };
+
+            _connection.RunQueries(queries, _logger);
+
+            PrepareStatements();
+        }
+
+        private void PrepareStatements()
+        {
+            _saveActivityCommand = _connection.CreateCommand();
+            _saveActivityCommand.CommandText = "replace into ActivityLogEntries (Id, Name, Overview, ShortOverview, Type, ItemId, UserId, DateCreated, LogSeverity) values (@Id, @Name, @Overview, @ShortOverview, @Type, @ItemId, @UserId, @DateCreated, @LogSeverity)";
+
+            _saveActivityCommand.Parameters.Add(_saveActivityCommand, "@Id");
+            _saveActivityCommand.Parameters.Add(_saveActivityCommand, "@Name");
+            _saveActivityCommand.Parameters.Add(_saveActivityCommand, "@Overview");
+            _saveActivityCommand.Parameters.Add(_saveActivityCommand, "@ShortOverview");
+            _saveActivityCommand.Parameters.Add(_saveActivityCommand, "@Type");
+            _saveActivityCommand.Parameters.Add(_saveActivityCommand, "@ItemId");
+            _saveActivityCommand.Parameters.Add(_saveActivityCommand, "@UserId");
+            _saveActivityCommand.Parameters.Add(_saveActivityCommand, "@DateCreated");
+            _saveActivityCommand.Parameters.Add(_saveActivityCommand, "@LogSeverity");
+        }
+
+        private const string BaseActivitySelectText = "select Id, Name, Overview, ShortOverview, Type, ItemId, UserId, DateCreated, LogSeverity from ActivityLogEntries";
+
+        public Task Create(ActivityLogEntry entry)
+        {
+            return Update(entry);
+        }
+
+        public async Task Update(ActivityLogEntry entry)
+        {
+            if (entry == null)
+            {
+                throw new ArgumentNullException("entry");
+            }
+
+            await _writeLock.WaitAsync().ConfigureAwait(false);
+
+            IDbTransaction transaction = null;
+
+            try
+            {
+                transaction = _connection.BeginTransaction();
+
+                var index = 0;
+
+                _saveActivityCommand.GetParameter(index++).Value = new Guid(entry.Id);
+                _saveActivityCommand.GetParameter(index++).Value = entry.Name;
+                _saveActivityCommand.GetParameter(index++).Value = entry.Overview;
+                _saveActivityCommand.GetParameter(index++).Value = entry.ShortOverview;
+                _saveActivityCommand.GetParameter(index++).Value = entry.Type;
+                _saveActivityCommand.GetParameter(index++).Value = entry.ItemId;
+                _saveActivityCommand.GetParameter(index++).Value = entry.UserId;
+                _saveActivityCommand.GetParameter(index++).Value = entry.Date;
+                _saveActivityCommand.GetParameter(index++).Value = entry.Severity.ToString();
+
+                _saveActivityCommand.Transaction = transaction;
+
+                _saveActivityCommand.ExecuteNonQuery();
+
+                transaction.Commit();
+            }
+            catch (OperationCanceledException)
+            {
+                if (transaction != null)
+                {
+                    transaction.Rollback();
+                }
+
+                throw;
+            }
+            catch (Exception e)
+            {
+                _logger.ErrorException("Failed to save record:", e);
+
+                if (transaction != null)
+                {
+                    transaction.Rollback();
+                }
+
+                throw;
+            }
+            finally
+            {
+                if (transaction != null)
+                {
+                    transaction.Dispose();
+                }
+
+                _writeLock.Release();
+            }
+        }
+
+        public QueryResult<ActivityLogEntry> GetActivityLogEntries(int? startIndex, int? limit)
+        {
+            using (var cmd = _connection.CreateCommand())
+            {
+                cmd.CommandText = BaseActivitySelectText;
+
+                var whereClauses = new List<string>();
+
+                if (startIndex.HasValue && startIndex.Value > 0)
+                {
+                    whereClauses.Add(string.Format("Id NOT IN (SELECT Id FROM ActivityLogEntries ORDER BY DateCreated DESC LIMIT {0})",
+                        startIndex.Value.ToString(_usCulture)));
+                }
+
+                if (whereClauses.Count > 0)
+                {
+                    cmd.CommandText += " where " + string.Join(" AND ", whereClauses.ToArray());
+                }
+
+                cmd.CommandText += " ORDER BY DateCreated DESC";
+
+                if (limit.HasValue)
+                {
+                    cmd.CommandText += " LIMIT " + limit.Value.ToString(_usCulture);
+                }
+
+                cmd.CommandText += "; select count (Id) from ActivityLogEntries";
+
+                var list = new List<ActivityLogEntry>();
+                var count = 0;
+
+                using (var reader = cmd.ExecuteReader(CommandBehavior.SequentialAccess))
+                {
+                    while (reader.Read())
+                    {
+                        list.Add(GetEntry(reader));
+                    }
+
+                    if (reader.NextResult() && reader.Read())
+                    {
+                        count = reader.GetInt32(0);
+                    }
+                }
+
+                return new QueryResult<ActivityLogEntry>()
+                {
+                    Items = list.ToArray(),
+                    TotalRecordCount = count
+                };
+            }
+        }
+
+        private ActivityLogEntry GetEntry(IDataReader reader)
+        {
+            var index = 0;
+
+            var info = new ActivityLogEntry
+            {
+                Id = reader.GetGuid(index).ToString("N")
+            };
+
+            index++;
+            if (!reader.IsDBNull(index))
+            {
+                info.Name = reader.GetString(index);
+            }
+
+            index++;
+            if (!reader.IsDBNull(index))
+            {
+                info.Overview = reader.GetString(index);
+            }
+
+            index++;
+            if (!reader.IsDBNull(index))
+            {
+                info.ShortOverview = reader.GetString(index);
+            }
+
+            index++;
+            if (!reader.IsDBNull(index))
+            {
+                info.Type = reader.GetString(index);
+            }
+
+            index++;
+            if (!reader.IsDBNull(index))
+            {
+                info.ItemId = reader.GetString(index);
+            }
+
+            index++;
+            if (!reader.IsDBNull(index))
+            {
+                info.UserId = reader.GetString(index);
+            }
+
+            index++;
+            info.Date = reader.GetDateTime(index).ToUniversalTime();
+
+            index++;
+            if (!reader.IsDBNull(index))
+            {
+                info.Severity = (LogSeverity)Enum.Parse(typeof(LogSeverity), reader.GetString(index), true);
+            }
+
+            return info;
+        }
+
+        /// <summary>
+        /// Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.
+        /// </summary>
+        public void Dispose()
+        {
+            Dispose(true);
+            GC.SuppressFinalize(this);
+        }
+
+        private readonly object _disposeLock = new object();
+
+        /// <summary>
+        /// Releases unmanaged and - optionally - managed resources.
+        /// </summary>
+        /// <param name="dispose"><c>true</c> to release both managed and unmanaged resources; <c>false</c> to release only unmanaged resources.</param>
+        protected virtual void Dispose(bool dispose)
+        {
+            if (dispose)
+            {
+                try
+                {
+                    lock (_disposeLock)
+                    {
+                        if (_connection != null)
+                        {
+                            if (_connection.IsOpen())
+                            {
+                                _connection.Close();
+                            }
+
+                            _connection.Dispose();
+                            _connection = null;
+                        }
+                    }
+                }
+                catch (Exception ex)
+                {
+                    _logger.ErrorException("Error disposing database", ex);
+                }
+            }
+        }
+    }
+}