From cc3e8dbbb942977d8f46a0a16e3802c0e5d0c94b Mon Sep 17 00:00:00 2001
From: Luke Pulverenti <luke.pulverenti@gmail.com>
Date: Sun, 12 Jan 2014 10:58:47 -0500
Subject: added suggested live tv page

---
 .../LiveTv/LiveTvManager.cs                        | 140 ++++++++++++++++++++-
 1 file changed, 138 insertions(+), 2 deletions(-)

(limited to 'MediaBrowser.Server.Implementations')

diff --git a/MediaBrowser.Server.Implementations/LiveTv/LiveTvManager.cs b/MediaBrowser.Server.Implementations/LiveTv/LiveTvManager.cs
index 17e17ab70..91766e0f8 100644
--- a/MediaBrowser.Server.Implementations/LiveTv/LiveTvManager.cs
+++ b/MediaBrowser.Server.Implementations/LiveTv/LiveTvManager.cs
@@ -32,6 +32,7 @@ namespace MediaBrowser.Server.Implementations.LiveTv
         private readonly ILogger _logger;
         private readonly IItemRepository _itemRepo;
         private readonly IUserManager _userManager;
+        private readonly IUserDataManager _userDataManager;
         private readonly ILibraryManager _libraryManager;
         private readonly IMediaEncoder _mediaEncoder;
 
@@ -54,6 +55,7 @@ namespace MediaBrowser.Server.Implementations.LiveTv
             _userManager = userManager;
             _libraryManager = libraryManager;
             _mediaEncoder = mediaEncoder;
+            _userDataManager = userDataManager;
 
             _tvDtoService = new LiveTvDtoService(dtoService, userDataManager, imageProcessor, logger, _itemRepo);
         }
@@ -428,7 +430,6 @@ namespace MediaBrowser.Server.Implementations.LiveTv
             }
 
             var returnArray = programs
-                .OrderBy(i => i.ProgramInfo.StartDate)
                 .Select(i =>
                 {
                     var channel = GetChannel(i);
@@ -450,6 +451,138 @@ namespace MediaBrowser.Server.Implementations.LiveTv
             return result;
         }
 
+        public async Task<QueryResult<ProgramInfoDto>> GetRecommendedPrograms(RecommendedProgramQuery query, CancellationToken cancellationToken)
+        {
+            IEnumerable<LiveTvProgram> programs = _programs.Values;
+
+            var user = _userManager.GetUserById(new Guid(query.UserId));
+
+            // Avoid implicitly captured closure
+            var currentUser = user;
+            programs = programs.Where(i => i.IsParentalAllowed(currentUser));
+
+            if (query.IsAiring.HasValue)
+            {
+                var val = query.IsAiring.Value;
+                programs = programs.Where(i => i.IsAiring == val);
+            }
+
+            if (query.HasAired.HasValue)
+            {
+                var val = query.HasAired.Value;
+                programs = programs.Where(i => i.HasAired == val);
+            }
+
+            var serviceName = ActiveService.Name;
+
+            var programList = programs.ToList();
+
+            var genres = programList.SelectMany(i => i.Genres)
+                .Distinct(StringComparer.OrdinalIgnoreCase)
+                .Select(i => _libraryManager.GetGenre(i))
+                .ToDictionary(i => i.Name, StringComparer.OrdinalIgnoreCase);
+
+            programs = programList.OrderByDescending(i => GetRecommendationScore(i.ProgramInfo, user.Id, serviceName, genres))
+                .ThenBy(i => i.ProgramInfo.StartDate);
+
+            if (query.Limit.HasValue)
+            {
+                programs = programs.Take(query.Limit.Value)
+                    .OrderBy(i => i.ProgramInfo.StartDate);
+            }
+
+            var returnArray = programs
+                .Select(i =>
+                {
+                    var channel = GetChannel(i);
+
+                    var channelName = channel == null ? null : channel.ChannelInfo.Name;
+
+                    return _tvDtoService.GetProgramInfoDto(i, channelName, user);
+                })
+                .ToArray();
+
+            await AddRecordingInfo(returnArray, cancellationToken).ConfigureAwait(false);
+
+            var result = new QueryResult<ProgramInfoDto>
+            {
+                Items = returnArray,
+                TotalRecordCount = returnArray.Length
+            };
+
+            return result;
+        }
+
+        private int GetRecommendationScore(ProgramInfo program, Guid userId, string serviceName, Dictionary<string, Genre> genres)
+        {
+            var score = 0;
+
+            if (program.IsLive)
+            {
+                score++;
+            }
+
+            if (program.IsSeries && !program.IsRepeat)
+            {
+                score++;
+            }
+
+            var internalChannelId = _tvDtoService.GetInternalChannelId(serviceName, program.ChannelId);
+            var channel = GetInternalChannel(internalChannelId);
+
+            var channelUserdata = _userDataManager.GetUserData(userId, channel.GetUserDataKey());
+
+            if ((channelUserdata.Likes ?? false))
+            {
+                score += 2;
+            }
+            else if (!(channelUserdata.Likes ?? true))
+            {
+                score -= 2;
+            }
+
+            if (channelUserdata.IsFavorite)
+            {
+                score += 3;
+            }
+
+            score += GetGenreScore(program.Genres, userId, genres);
+
+            return score;
+        }
+
+        private int GetGenreScore(IEnumerable<string> programGenres, Guid userId, Dictionary<string, Genre> genres)
+        {
+            return programGenres.Select(i =>
+            {
+                var score = 0;
+
+                Genre genre;
+
+                if (genres.TryGetValue(i, out genre))
+                {
+                    var genreUserdata = _userDataManager.GetUserData(userId, genre.GetUserDataKey());
+
+                    if ((genreUserdata.Likes ?? false))
+                    {
+                        score++;
+                    }
+                    else if (!(genreUserdata.Likes ?? true))
+                    {
+                        score--;
+                    }
+
+                    if (genreUserdata.IsFavorite)
+                    {
+                        score += 2;
+                    }
+                }
+
+                return score;
+
+            }).Sum();
+        }
+
         private async Task AddRecordingInfo(IEnumerable<ProgramInfoDto> programs, CancellationToken cancellationToken)
         {
             var timers = await ActiveService.GetTimersAsync(cancellationToken).ConfigureAwait(false);
@@ -533,7 +666,10 @@ namespace MediaBrowser.Server.Implementations.LiveTv
 
                 try
                 {
-                    var channelPrograms = await service.GetProgramsAsync(currentChannel.ChannelInfo.Id, cancellationToken).ConfigureAwait(false);
+                    var start = DateTime.UtcNow;
+                    var end = start.AddDays(3);
+
+                    var channelPrograms = await service.GetProgramsAsync(currentChannel.ChannelInfo.Id, start, end, cancellationToken).ConfigureAwait(false);
 
                     var programTasks = channelPrograms.Select(program => GetProgram(program, currentChannel.ChannelInfo.ChannelType, service.Name, cancellationToken));
                     var programEntities = await Task.WhenAll(programTasks).ConfigureAwait(false);
-- 
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