rework media layout (#22)

* replace media items tables with card grids

* style cleanup

* add basic paging

* sort and page in the db

* optimize sql for movies

* support movie posters

* resize movie posters and store in cache with channel logos

* fix bug preventing folders with more than 50 chars as local media sources

* support tv posters

ErsatzTV.Application/Images/Commands/SaveImageToDiskHandler.cs

@@ -1,9 +1,7 @@
-using System;
-using System.IO;
-using System.Security.Cryptography;
-using System.Threading;
+using System.Threading;
 using System.Threading.Tasks;
 using ErsatzTV.Core;
+using ErsatzTV.Core.Interfaces.Images;
 using LanguageExt;
 using MediatR;
 
@@ -11,33 +9,12 @@ namespace ErsatzTV.Application.Images.Commands
 {
     public class SaveImageToDiskHandler : IRequestHandler<SaveImageToDisk, Either<BaseError, string>>
     {
-        private static readonly SHA1CryptoServiceProvider Crypto;
+        private readonly IImageCache _imageCache;
 
-        static SaveImageToDiskHandler() => Crypto = new SHA1CryptoServiceProvider();
+        public SaveImageToDiskHandler(IImageCache imageCache) => _imageCache = imageCache;
 
-        public async Task<Either<BaseError, string>> Handle(
+        public Task<Either<BaseError, string>> Handle(
             SaveImageToDisk request,
-            CancellationToken cancellationToken)
-        {
-            try
-            {
-                byte[] hash = Crypto.ComputeHash(request.Buffer);
-                string hex = BitConverter.ToString(hash).Replace("-", string.Empty);
-
-                string fileName = Path.Combine(FileSystemLayout.ImageCacheFolder, hex);
-
-                if (!Directory.Exists(FileSystemLayout.ImageCacheFolder))
-                {
-                    Directory.CreateDirectory(FileSystemLayout.ImageCacheFolder);
-                }
-
-                await File.WriteAllBytesAsync(fileName, request.Buffer, cancellationToken);
-                return hex;
-            }
-            catch (Exception ex)
-            {
-                return BaseError.New(ex.Message);
-            }
-        }
+            CancellationToken cancellationToken) => _imageCache.SaveImage(request.Buffer);
     }
 }