roadie/Roadie.Api.Services/AdminService.cs

using Microsoft.AspNetCore.Identity;
using Microsoft.AspNetCore.SignalR;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Logging;
using Roadie.Api.Hubs;
using Roadie.Library;
using Roadie.Library.Caching;
using Roadie.Library.Configuration;
using Roadie.Library.Data;
using Roadie.Library.Encoding;
using Roadie.Library.Engines;
using Roadie.Library.Enums;
using Roadie.Library.Extensions;
using Roadie.Library.Factories;
using Roadie.Library.Identity;
using Roadie.Library.MetaData.Audio;
using Roadie.Library.MetaData.FileName;
using Roadie.Library.MetaData.ID3Tags;
using Roadie.Library.MetaData.LastFm;
using Roadie.Library.MetaData.MusicBrainz;
using Roadie.Library.Models;
using Roadie.Library.Processors;
using Roadie.Library.Utility;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Threading.Tasks;

using data = Roadie.Library.Data;

namespace Roadie.Api.Services
{
    public class AdminService : ServiceBase, IAdminService
    {
        protected IHubContext<ScanActivityHub> ScanActivityHub { get; }
        private IArtistFactory ArtistFactory { get; }
        private IArtistLookupEngine ArtistLookupEngine { get; }
        private IAudioMetaDataHelper AudioMetaDataHelper { get; }
        private IEventMessageLogger EventMessageLogger { get; }
        private IFileNameHelper FileNameHelper { get; }
        private IID3TagsHelper ID3TagsHelper { get; }
        private IImageFactory ImageFactory { get; }
        private ILabelFactory LabelFactory { get; }
        private ILabelLookupEngine LabelLookupEngine { get; }
        private ILastFmHelper LastFmHelper { get; }

        private ILogger MessageLogger
        {
            get
            {
                return this.EventMessageLogger as ILogger;
            }
        }

        private IMusicBrainzProvider MusicBrainzProvider { get; }
        private IReleaseFactory ReleaseFactory { get; }
        private IReleaseLookupEngine ReleaseLookupEngine { get; }

        public AdminService(IRoadieSettings configuration,
                             IHttpEncoder httpEncoder,
                             IHttpContext httpContext,
                             data.IRoadieDbContext context,
                             ICacheManager cacheManager,
                             ILogger<ArtistService> logger,
                             IHubContext<ScanActivityHub> scanActivityHub
            )
            : base(configuration, httpEncoder, context, cacheManager, logger, httpContext)
        {
            this.ScanActivityHub = scanActivityHub;
            this.EventMessageLogger = new EventMessageLogger();
            this.EventMessageLogger.Messages += EventMessageLogger_Messages;

            this.MusicBrainzProvider = new MusicBrainzProvider(configuration, cacheManager, MessageLogger);
            this.LastFmHelper = new LastFmHelper(configuration, cacheManager, MessageLogger);
            this.FileNameHelper = new FileNameHelper(configuration, cacheManager, MessageLogger);
            this.ID3TagsHelper = new ID3TagsHelper(configuration, cacheManager, MessageLogger);

            this.ArtistLookupEngine = new ArtistLookupEngine(configuration, httpEncoder, context, cacheManager, MessageLogger);
            this.LabelLookupEngine = new LabelLookupEngine(configuration, httpEncoder, context, cacheManager, MessageLogger);
            this.ReleaseLookupEngine = new ReleaseLookupEngine(configuration, httpEncoder, context, cacheManager, MessageLogger, this.ArtistLookupEngine, this.LabelLookupEngine);
            this.ImageFactory = new ImageFactory(configuration, httpEncoder, context, cacheManager, MessageLogger, this.ArtistLookupEngine, this.ReleaseLookupEngine);
            this.LabelFactory = new LabelFactory(configuration, httpEncoder, context, cacheManager, MessageLogger, this.ArtistLookupEngine, this.ReleaseLookupEngine);
            this.AudioMetaDataHelper = new AudioMetaDataHelper(configuration, httpEncoder, context, this.MusicBrainzProvider, this.LastFmHelper, cacheManager,
                                                               MessageLogger, this.ArtistLookupEngine, this.ImageFactory, this.FileNameHelper, this.ID3TagsHelper);
            this.ReleaseFactory = new ReleaseFactory(configuration, httpEncoder, context, cacheManager, MessageLogger, this.ArtistLookupEngine, this.LabelFactory, this.AudioMetaDataHelper, this.ReleaseLookupEngine);
            this.ArtistFactory = new ArtistFactory(configuration, httpEncoder, context, cacheManager, MessageLogger, this.ArtistLookupEngine, this.ReleaseFactory, this.ImageFactory, this.ReleaseLookupEngine, this.AudioMetaDataHelper);
        }

        public async Task<OperationResult<bool>> DeleteArtist(ApplicationUser user, Guid artistId)
        {
            var sw = new Stopwatch();
            sw.Start();
            var errors = new List<Exception>();
            var artist = this.DbContext.Artists.FirstOrDefault(x => x.RoadieId == artistId);
            if (artist == null)
            {
                await this.LogAndPublish($"DeleteArtist Unknown Artist [{ artistId}]", LogLevel.Warning);
                return new OperationResult<bool>(true, $"Artist Not Found [{ artistId }]");
            }
            try
            {
                var result = await this.ArtistFactory.Delete(artist);
                if (!result.IsSuccess)
                {
                    return new OperationResult<bool>
                    {
                        Errors = result.Errors
                    };
                }
            }
            catch (Exception ex)
            {
                this.Logger.LogError(ex);
                await this.LogAndPublish("Error deleting artist.");
                errors.Add(ex);
            }
            sw.Stop();
            await this.LogAndPublish($"DeleteArtist `{ artist }`, By User `{user }`", LogLevel.Information);
            return new OperationResult<bool>
            {
                IsSuccess = !errors.Any(),
                Data = true,
                OperationTime = sw.ElapsedMilliseconds,
                Errors = errors
            };
        }

        public async Task<OperationResult<bool>> DeleteArtistReleases(ApplicationUser user, Guid artistId, bool doDeleteFiles = false)
        {
            var sw = new Stopwatch();
            sw.Start();
            var errors = new List<Exception>();
            var artist = this.DbContext.Artists.FirstOrDefault(x => x.RoadieId == artistId);
            if (artist == null)
            {
                await this.LogAndPublish($"DeleteArtistReleases Unknown Artist [{ artistId}]", LogLevel.Warning);
                return new OperationResult<bool>(true, $"Artist Not Found [{ artistId }]");
            }
            try
            {
                await this.ReleaseFactory.DeleteReleases(this.DbContext.Releases.Where(x => x.ArtistId == artist.Id).Select(x => x.RoadieId).ToArray(), doDeleteFiles);
                await this.DbContext.SaveChangesAsync();
            }
            catch (Exception ex)
            {
                this.Logger.LogError(ex);
                await this.LogAndPublish("Error deleting artist.");
                errors.Add(ex);
            }
            sw.Stop();
            await this.LogAndPublish($"DeleteArtistReleases `{ artist }`, By User `{user }`", LogLevel.Information);
            return new OperationResult<bool>
            {
                IsSuccess = !errors.Any(),
                Data = true,
                OperationTime = sw.ElapsedMilliseconds,
                Errors = errors
            };
        }

        public async Task<OperationResult<bool>> DeleteTrack(ApplicationUser user, Guid trackId, bool? doDeleteFile)
        {
            var sw = new Stopwatch();
            sw.Start();

            var errors = new List<Exception>();

            var track = this.DbContext.Tracks.Include(x => x.ReleaseMedia)
                                      .Include(x => x.ReleaseMedia.Release)
                                      .Include(x => x.ReleaseMedia.Release.Artist)
                                      .FirstOrDefault(x => x.RoadieId == trackId);
            try
            {
                if (track == null)
                {
                    await this.LogAndPublish($"DeleteTrack Unknown Track [{ trackId}]", LogLevel.Warning);
                    return new OperationResult<bool>(true, $"Track Not Found [{ trackId }]");
                }
                this.DbContext.Tracks.Remove(track);
                await this.DbContext.SaveChangesAsync();
                if (doDeleteFile ?? false)
                {
                    string trackPath = null;
                    try
                    {
                        trackPath = track.PathToTrack(this.Configuration, this.Configuration.LibraryFolder);
                        if (File.Exists(trackPath))
                        {
                            File.Delete(trackPath);
                            this.Logger.LogWarning($"x For Track `{ track }`, Deleted File [{ trackPath }]");
                        }
                    }
                    catch (Exception ex)
                    {
                        this.Logger.LogError(ex, string.Format("Error Deleting File [{0}] For Track [{1}] Exception [{2}]", trackPath, track.Id, ex.Serialize()));
                    }
                }
                await this.ReleaseFactory.ScanReleaseFolder(track.ReleaseMedia.Release.RoadieId, this.Configuration.LibraryFolder, false, track.ReleaseMedia.Release);
            }
            catch (Exception ex)
            {
                this.Logger.LogError(ex);
                await this.LogAndPublish("Error deleting track.");
                errors.Add(ex);
            }
            sw.Stop();
            await this.LogAndPublish($"DeleteTrack `{ track }`, By User `{ user}`", LogLevel.Information);
            this.CacheManager.Clear();
            return new OperationResult<bool>
            {
                IsSuccess = !errors.Any(),
                Data = true,
                OperationTime = sw.ElapsedMilliseconds,
                Errors = errors
            };
        }

        public async Task<OperationResult<bool>> DeleteRelease(ApplicationUser user, Guid releaseId, bool? doDeleteFiles)
        {
            var sw = new Stopwatch();
            sw.Start();

            var errors = new List<Exception>();

            var release = this.DbContext.Releases.Include(x => x.Artist).FirstOrDefault(x => x.RoadieId == releaseId);
            try
            {
                if (release == null)
                {
                    await this.LogAndPublish($"DeleteRelease Unknown Release [{ releaseId}]", LogLevel.Warning);
                    return new OperationResult<bool>(true, $"Release Not Found [{ releaseId }]");
                }
                await this.ReleaseFactory.Delete(release, doDeleteFiles ?? false);
            }
            catch (Exception ex)
            {
                this.Logger.LogError(ex);
                await this.LogAndPublish("Error deleting release.");
                errors.Add(ex);
            }
            sw.Stop();
            await this.LogAndPublish($"DeleteRelease `{ release }`, By User `{ user}`", LogLevel.Information);
            this.CacheManager.Clear();
            return new OperationResult<bool>
            {
                IsSuccess = !errors.Any(),
                Data = true,
                OperationTime = sw.ElapsedMilliseconds,
                Errors = errors
            };
        }

        /// <summary>
        /// This is a very simple way to seed the database or setup configuration when the first (who becomes "Admin") user registers
        /// </summary>
        public async Task<OperationResult<bool>> DoInitialSetup(ApplicationUser user, UserManager<ApplicationUser> userManager)
        {
            var sw = new Stopwatch();
            sw.Start();

            // Create user roles
            this.DbContext.UserRoles.Add(new ApplicationRole
            {
                Name = "Admin",
                Description = "Users with Administrative (full) access",
                NormalizedName = "ADMIN"
            });
            this.DbContext.UserRoles.Add(new ApplicationRole
            {
                Name = "Editor",
                Description = "Users who have Edit Permissions",
                NormalizedName = "EDITOR"
            });
            await this.DbContext.SaveChangesAsync();

            // Add given user to Admin role
            await userManager.AddToRoleAsync(user, "Admin");

            // Create special system artists of 'Sound Tracks' and 'Various Artists'
            this.DbContext.Artists.Add(new data.Artist
            {
                AlternateNames = "Sound Track|Film Sound Track|Film Sound Tracks|Les Sound Track|Motion Picture Soundtrack|Original Motion Picture SoundTrack|Original Motion Picture SoundTracks|Original Cast Album|Original Soundtrack|Soundtracks|SoundTrack|soundtracks|Original Cast|Original Cast Soundtrack|Motion Picture Cast Recording|Cast Recording",
                ArtistType = "Meta",
                BioContext = "A soundtrack, also written sound track, can be recorded music accompanying and synchronized to the images of a motion picture, book, television program or video game; a commercially released soundtrack album of music as featured in the soundtrack of a film or TV show; or the physical area of a film that contains the synchronized recorded sound.",
                Name = "Sound Tracks",
                SortName = "Sound Tracks",
                Status = Statuses.Ok,
                Tags = "movie and television soundtracks|video game soundtracks|book soundstracks|composite|compilations",
                URLs = "https://en.wikipedia.org/wiki/Soundtrack"
            });
            this.DbContext.Artists.Add(new data.Artist
            {
                AlternateNames = "Various Artists|Various BNB artist|variousartist|va",
                ArtistType = "Meta",
                BioContext = "Songs included on a compilation album may be previously released or unreleased, usually from several separate recordings by either one or several performers. If by one artist, then generally the tracks were not originally intended for release together as a single work, but may be collected together as a greatest hits album or box set. If from several performers, there may be a theme, topic, or genre which links the tracks, or they may have been intended for release as a single work—such as a tribute album. When the tracks are by the same recording artist, the album may be referred to as a retrospective album or an anthology. Compilation albums may employ traditional product bundling strategies",
                Name = "Various Artists",
                SortName = "Various Artist",
                Status = Statuses.Ok,
                Tags = "compilations|various",
                URLs = "https://en.wikipedia.org/wiki/Compilation_album"
            });
            await this.DbContext.SaveChangesAsync();

            return new OperationResult<bool>
            {
                Data = true,
                IsSuccess = true,
                OperationTime = sw.ElapsedMilliseconds
            };
        }

        public async Task<OperationResult<bool>> ScanArtist(ApplicationUser user, Guid artistId, bool isReadOnly = false)
        {
            var sw = new Stopwatch();
            sw.Start();

            var errors = new List<Exception>();
            var artist = this.DbContext.Artists.FirstOrDefault(x => x.RoadieId == artistId);
            if (artist == null)
            {
                await this.LogAndPublish($"ScanArtist Unknown Release [{ artistId}]", LogLevel.Warning);
                return new OperationResult<bool>(true, $"Artist Not Found [{ artistId }]");
            }
            try
            {
                var result = await this.ArtistFactory.ScanArtistReleasesFolders(artist.RoadieId, this.Configuration.LibraryFolder, isReadOnly);
                this.CacheManager.ClearRegion(artist.CacheRegion);
            }
            catch (Exception ex)
            {
                await this.LogAndPublish(ex.ToString(), LogLevel.Error);
                errors.Add(ex);
            }
            sw.Stop();
            this.DbContext.ScanHistories.Add(new data.ScanHistory
            {
                UserId = user.Id,
                ForArtistId = artist.Id,
                NewReleases = this.ReleaseLookupEngine.AddedReleaseIds.Count(),
                NewTracks = this.ReleaseFactory.AddedTrackIds.Count(),
                TimeSpanInSeconds = (int)sw.Elapsed.TotalSeconds
            });
            await this.DbContext.SaveChangesAsync();
            await this.UpdateArtistRank(artist.Id, true);
            await this.LogAndPublish($"ScanArtist `{artist}`, By User `{user}`", LogLevel.Information);
            return new OperationResult<bool>
            {
                IsSuccess = !errors.Any(),
                AdditionalData = new Dictionary<string, object> { { "artistAverage", artist.Rating } },
                OperationTime = sw.ElapsedMilliseconds,
                Errors = errors
            };
        }

        public async Task<OperationResult<bool>> ScanAllCollections(ApplicationUser user, bool isReadOnly = false, bool doPurgeFirst = true)
        {
            var sw = new Stopwatch();
            sw.Start();
            var errors = new List<Exception>();

            var collections = this.DbContext.Collections.Where(x => x.Status != Statuses.Complete).ToArray();
            foreach(var collection in collections)
            {
                try
                {
                    var result = await this.ScanCollection(user, collection.RoadieId, isReadOnly, doPurgeFirst);
                    if (!result.IsSuccess)
                    {
                        errors.AddRange(result.Errors);
                    }
                }
                catch (Exception ex)
                {
                    this.Logger.LogError(ex);
                    errors.Add(ex);
                }
            }
            sw.Stop();
            this.Logger.LogInformation(string.Format("ScanAllCollections, By User `{0}`", user));
            return new OperationResult<bool>
            {
                IsSuccess = !errors.Any(),
                Data = true,
                OperationTime = sw.ElapsedMilliseconds,
                Errors = errors
            };
        }

        public Task<OperationResult<Dictionary<string, List<string>>>> MissingCollectionReleases(ApplicationUser user)
        {
            var sw = Stopwatch.StartNew();
            sw.Start();
            var missingData = new Dictionary<string, List<string>>();

            foreach (var collection in this.DbContext.Collections.Where(x => x.Status != Statuses.Complete))
            {
                var collectionReleases = (from cr in this.DbContext.CollectionReleases
                                          where cr.CollectionId == collection.Id
                                          select cr);
                PositionAristRelease[] pars = null;

                try
                {
                    pars = collection.PositionArtistReleases().ToArray();
                }
                catch (Exception ex)
                {
                    missingData.Add($"CSV Error [{ collection.Name }]", new List<string>{ ex.Message });
                    continue;
                }
                foreach (var par in pars)
                {
                    var cr = collectionReleases.FirstOrDefault(x => x.ListNumber == par.Position);
                    if (cr == null)
                    {
                        // If artist is already in result then add missing album to artist, if not then add artist then add missing album
                        if(!missingData.ContainsKey(par.Artist))
                        {
                            missingData.Add(par.Artist, new List<string>());
                        }
                        var r = $"[{ collection.Name }]:[{ par.Release }]";
                        missingData[par.Artist].Add(r);
                    }
                }
            }
            sw.Stop();
            return Task.FromResult(new OperationResult<Dictionary<string, List<string>>>
            {
                Data = missingData.OrderBy(x => x.Value.Count()).ToDictionary(x => x.Key, x => x.Value), 
                IsSuccess = true,
                OperationTime = sw.ElapsedMilliseconds
            });

        }

        public async Task<OperationResult<bool>> ScanCollection(ApplicationUser user, Guid collectionId, bool isReadOnly = false, bool doPurgeFirst = true)
        {
            var sw = new Stopwatch();
            sw.Start();

            CollectionRelease[] crs = new CollectionRelease[0];
            var result = new List<PositionAristRelease>();
            var errors = new List<Exception>();
            var collection = this.DbContext.Collections.FirstOrDefault(x => x.RoadieId == collectionId);
            if (collection == null)
            {
                await this.LogAndPublish($"ScanCollection Unknown Collection [{ collectionId}]", LogLevel.Warning);
                return new OperationResult<bool>(true, $"Collection Not Found [{ collectionId }]");
            }
            try
            {
                if (doPurgeFirst)
                {
                    crs = this.DbContext.CollectionReleases.Where(x => x.CollectionId == collection.Id).ToArray();
                    this.DbContext.CollectionReleases.RemoveRange(crs);
                    await this.DbContext.SaveChangesAsync();
                }
                var par = collection.PositionArtistReleases();
                if (par != null)
                {
                    var now = DateTime.UtcNow;
                    foreach (var csvRelease in par)
                    {                      

                        data.Artist artist = null;
                        data.Release release = null;

                        var searchName = csvRelease.Artist.NormalizeName();
                        var specialSearchName = csvRelease.Artist.ToAlphanumericName();

                        var artistResults = (from a in this.DbContext.Artists
                                            where (a.Name.Contains(searchName) ||
                                                   a.SortName.Contains(searchName) ||
                                                   a.AlternateNames.Contains(searchName) ||
                                                   a.AlternateNames.Contains(specialSearchName))
                                            select a).ToArray();
                        if (!artistResults.Any())
                        {
                            this.Logger.LogWarning("Unable To Find Artist [{0}], SearchName [{1}]", csvRelease.Artist, searchName);
                            csvRelease.Status = Library.Enums.Statuses.Missing;
                            continue;
                        }
                        foreach (var artistResult in artistResults)
                        {
                            artist = artistResult;
                            searchName = csvRelease.Release.NormalizeName().ToLower();
                            specialSearchName = csvRelease.Release.ToAlphanumericName();
                            release = (from r in this.DbContext.Releases
                                           where (r.ArtistId == artist.Id)
                                           where (r.Title.Contains(searchName) ||
                                                   r.AlternateNames.Contains(searchName) ||
                                                   r.AlternateNames.Contains(specialSearchName))
                                           select r
                                       ).FirstOrDefault();
                            if(release != null)
                            {
                                break;
                            }
                        }
                        if (release == null)
                        {
                            this.Logger.LogWarning("Unable To Find Release [{0}], SearchName [{1}]", csvRelease.Release, searchName);
                            csvRelease.Status = Library.Enums.Statuses.Missing;
                            continue;
                        }                        
                        var isInCollection = this.DbContext.CollectionReleases.FirstOrDefault(x => x.CollectionId == collection.Id && 
                                                                                                   x.ListNumber == csvRelease.Position &&                                                                                                    
                                                                                                   x.ReleaseId == release.Id);
                        // Found in Database but not in collection add to Collection
                        if (isInCollection == null)
                        {
                            this.DbContext.CollectionReleases.Add(new CollectionRelease
                            {
                                CollectionId = collection.Id,
                                ReleaseId = release.Id,
                                ListNumber = csvRelease.Position,
                            });
                        }
                        // If Item in Collection is at different List number update CollectionRelease
                        else if (isInCollection.ListNumber != csvRelease.Position)
                        {
                            isInCollection.LastUpdated = now;
                            isInCollection.ListNumber = csvRelease.Position;
                        }
                    }
                    collection.LastUpdated = now;
                    await this.DbContext.SaveChangesAsync();
                    var dto = new Library.Models.Collections.CollectionList
                    {
                        CollectionCount = collection.CollectionCount,
                        CollectionFoundCount = (from cr in this.DbContext.CollectionReleases
                                                where cr.CollectionId == collection.Id
                                                select cr.CollectionId).Count()
                    };
                    if (dto.PercentComplete == 100)
                    {
                        // Lock so future implicit scans dont happen, with DB RI when releases are deleted they are removed from collection
                        collection.IsLocked = true;
                        collection.Status = Statuses.Complete;
                    }
                    else
                    {
                        collection.Status = Statuses.Incomplete;
                    }
                    await this.DbContext.SaveChangesAsync();
                    foreach (var cr in crs)
                    {
                        await this.UpdateReleaseRank(cr.ReleaseId);
                    }
                    this.CacheManager.ClearRegion(collection.CacheRegion);
                }
            }
            catch (Exception ex)
            {
                this.Logger.LogError(ex);
                errors.Add(ex);
            }
            sw.Stop();
            this.Logger.LogInformation(string.Format("RescanCollection `{0}`, By User `{1}`", collection, user));

            return new OperationResult<bool>
            {
                IsSuccess = !errors.Any(),
                Data = true,
                OperationTime = sw.ElapsedMilliseconds,
                Errors = errors
            };
        }

        public async Task<OperationResult<bool>> ScanInboundFolder(ApplicationUser user, bool isReadOnly = false)
        {
            var d = new DirectoryInfo(this.Configuration.InboundFolder);
            var dest = new DirectoryInfo(this.Configuration.LibraryFolder);
            return await this.ScanFolder(d, dest, user, isReadOnly);
        }

        public async Task<OperationResult<bool>> ScanLibraryFolder(ApplicationUser user, bool isReadOnly = false)
        {
            var d = new DirectoryInfo(this.Configuration.LibraryFolder);
            var dest = new DirectoryInfo(this.Configuration.LibraryFolder);
            return await this.ScanFolder(d, dest, user, isReadOnly);
        }

        public async Task<OperationResult<bool>> ScanRelease(ApplicationUser user, Guid releaseId, bool isReadOnly = false, bool wasDoneForInvalidTrackPlay = false)
        {
            var sw = new Stopwatch();
            sw.Start();

            var errors = new List<Exception>();
            var release = this.DbContext.Releases
                                        .Include(x => x.Artist)
                                        .Include(x => x.Labels)
                                        .FirstOrDefault(x => x.RoadieId == releaseId);
            if (release == null)
            {
                await this.LogAndPublish($"ScanRelease Unknown Release [{ releaseId}]", LogLevel.Warning);
                return new OperationResult<bool>(true, $"Release Not Found [{ releaseId }]");
            }
            try
            {
                var result = await this.ReleaseFactory.ScanReleaseFolder(release.RoadieId, this.Configuration.LibraryFolder, isReadOnly, release);
                await this.UpdateReleaseRank(release.Id);
                this.CacheManager.ClearRegion(release.CacheRegion);
            }
            catch (Exception ex)
            {
                await this.LogAndPublish(ex.ToString(), LogLevel.Error);
                errors.Add(ex);
            }
            sw.Stop();
            
            this.DbContext.ScanHistories.Add(new data.ScanHistory
            {
                UserId = user.Id,
                ForReleaseId = release.Id,
                NewTracks = this.ReleaseFactory.AddedTrackIds.Count(),
                TimeSpanInSeconds = (int)sw.Elapsed.TotalSeconds
            });
            await this.DbContext.SaveChangesAsync();
            await this.LogAndPublish($"ScanRelease `{release}`, By User `{user}`, WasDoneForInvalidTrackPlay [{ wasDoneForInvalidTrackPlay }]", LogLevel.Information);
            return new OperationResult<bool>
            {
                IsSuccess = !errors.Any(),
                Data = true,
                OperationTime = sw.ElapsedMilliseconds,
                Errors = errors
            };
        }

        private void EventMessageLogger_Messages(object sender, EventMessage e)
        {
            Task.WaitAll(this.LogAndPublish(e.Message, e.Level));
        }

        private async Task LogAndPublish(string message, LogLevel level = LogLevel.Trace)
        {
            switch (level)
            {
                case LogLevel.Trace:
                    this.Logger.LogTrace(message);
                    break;

                case LogLevel.Debug:
                    this.Logger.LogDebug(message);
                    break;

                case LogLevel.Information:
                    this.Logger.LogInformation(message);
                    break;

                case LogLevel.Warning:
                    this.Logger.LogWarning(message);
                    break;

                case LogLevel.Critical:
                    this.Logger.LogCritical(message);
                    break;
            }
            await this.ScanActivityHub.Clients.All.SendAsync("SendSystemActivity", message);
        }

        private async Task<OperationResult<bool>> ScanFolder(DirectoryInfo d, DirectoryInfo dest, ApplicationUser user, bool isReadOnly)
        {
            var sw = new Stopwatch();
            sw.Start();

            long processedFiles = 0;
            await this.LogAndPublish($"** Processing Folder: [{d.FullName}]");

            long processedFolders = 0;
            var folderProcessor = new FolderProcessor(this.Configuration, this.HttpEncoder, this.Configuration.LibraryFolder, this.DbContext, this.CacheManager, this.MessageLogger, this.ArtistLookupEngine, this.ArtistFactory, this.ReleaseFactory, this.ImageFactory, this.ReleaseLookupEngine, this.AudioMetaDataHelper);

            var newArtists = 0;
            var newReleases = 0;
            var newTracks = 0;
            OperationResult<bool> result = null;
            foreach (var folder in Directory.EnumerateDirectories(d.FullName).ToArray())
            {
                result = await folderProcessor.Process(new DirectoryInfo(folder), isReadOnly);
                processedFolders++;
            }
            if (result.AdditionalData != null)
            {
                newArtists = SafeParser.ToNumber<int>(result.AdditionalData["newArtists"]);
                newReleases = SafeParser.ToNumber<int>(result.AdditionalData["newReleases"]);
                newTracks = SafeParser.ToNumber<int>(result.AdditionalData["newTracks"]);
            }
            if (!isReadOnly)
            {
                FolderProcessor.DeleteEmptyFolders(d, this.Logger);
            }
            sw.Stop();
            this.DbContext.ScanHistories.Add(new data.ScanHistory
            {
                UserId = user.Id,
                NewArtists = newArtists,
                NewReleases = newReleases,
                NewTracks = newTracks,
                TimeSpanInSeconds = (int)sw.Elapsed.TotalSeconds
            });
            await this.DbContext.SaveChangesAsync();
            this.CacheManager.Clear();
            await this.LogAndPublish($"**Completed!Processed Folders[{ processedFolders }], Processed Files[{ processedFiles}] : Elapsed Time[{ sw.Elapsed}]");
            return new OperationResult<bool>
            {
                Data = true,
                IsSuccess = true,
                OperationTime = sw.ElapsedMilliseconds
            };
        }
    }
}