fix resources (offline background and font) (#211)

ErsatzTV.Core/FFmpeg/FFmpegProcessBuilder.cs

@@ -225,7 +225,8 @@ namespace ErsatzTV.Core.FFmpeg
 
         public FFmpegProcessBuilder WithErrorText(IDisplaySize desiredResolution, string text)
         {
-            const string FONT_FILE = "fontfile=Resources/Roboto-Regular.ttf";
+            string fontPath = Path.Combine(FileSystemLayout.ResourcesCacheFolder, "Roboto-Regular.ttf");            
+            var fontFile = $"fontfile={fontPath}";
             const string FONT_COLOR = "fontcolor=white";
             const string X = "x=(w-text_w)/2";
             const string Y = "y=(h-text_h)/3*2";
@@ -233,7 +234,7 @@ namespace ErsatzTV.Core.FFmpeg
             string fontSize = text.Length > 80 ? "fontsize=30" : text.Length > 60 ? "fontsize=40" : "fontsize=60";
 
             return WithFilterComplex(
-                $"[0:0]scale={desiredResolution.Width}:{desiredResolution.Height},drawtext={FONT_FILE}:{fontSize}:{FONT_COLOR}:{X}:{Y}:text='{text}'[v]",
+                $"[0:0]scale={desiredResolution.Width}:{desiredResolution.Height},drawtext={fontFile}:{fontSize}:{FONT_COLOR}:{X}:{Y}:text='{text}'[v]",
                 "[v]",
                 "1:a");
         }

ErsatzTV.Core/FFmpeg/FFmpegProcessService.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Diagnostics;
+using System.IO;
 using System.Threading.Tasks;
 using ErsatzTV.Core.Domain;
 using ErsatzTV.Core.Interfaces.FFmpeg;
@@ -110,7 +111,7 @@ namespace ErsatzTV.Core.FFmpeg
                 .WithQuiet()
                 .WithFormatFlags(playbackSettings.FormatFlags)
                 .WithRealtimeOutput(playbackSettings.RealtimeOutput)
-                .WithLoopedImage("Resources/background.png")
+                .WithLoopedImage(Path.Combine(FileSystemLayout.ResourcesCacheFolder, "background.png"))
                 .WithLibavfilter()
                 .WithInput("anullsrc")
                 .WithErrorText(desiredResolution, errorMessage)

ErsatzTV.Core/FileSystemLayout.cs

@@ -16,6 +16,7 @@ namespace ErsatzTV.Core
         public static readonly string LogDatabasePath = Path.Combine(AppDataFolder, "logs.sqlite3");
 
         public static readonly string LegacyImageCacheFolder = Path.Combine(AppDataFolder, "cache", "images");
+        public static readonly string ResourcesCacheFolder = Path.Combine(AppDataFolder, "cache", "resources");
 
         public static readonly string PlexSecretsPath = Path.Combine(AppDataFolder, "plex-secrets.json");
         public static readonly string JellyfinSecretsPath = Path.Combine(AppDataFolder, "jellyfin-secrets.json");

ErsatzTV/ErsatzTV.csproj

@@ -51,12 +51,9 @@
     </ItemGroup>
 
     <ItemGroup>
-      <None Update="Resources\background.png">
-        <CopyToOutputDirectory>Always</CopyToOutputDirectory>
-      </None>
-      <None Update="Resources\Roboto-Regular.ttf">
-        <CopyToOutputDirectory>Always</CopyToOutputDirectory>
-      </None>
+      <EmbeddedResource Include="Resources\background.png" />
+      <EmbeddedResource Include="Resources\ErsatzTV.png" />
+      <EmbeddedResource Include="Resources\Roboto-Regular.ttf" />
     </ItemGroup>
 
 </Project>

ErsatzTV/Services/RunOnce/ResourceExtractorService.cs

@@ -0,0 +1,42 @@
+using System.IO;
+using System.Reflection;
+using System.Threading;
+using System.Threading.Tasks;
+using ErsatzTV.Core;
+using Microsoft.Extensions.Hosting;
+
+namespace ErsatzTV.Services.RunOnce
+{
+    public class ResourceExtractorService : IHostedService
+    {
+        public async Task StartAsync(CancellationToken cancellationToken)
+        {
+            if (!Directory.Exists(FileSystemLayout.ResourcesCacheFolder))
+            {
+                Directory.CreateDirectory(FileSystemLayout.ResourcesCacheFolder);
+            }
+
+            Assembly assembly = typeof(ResourceExtractorService).GetTypeInfo().Assembly;
+            
+            await ExtractResource(assembly, "background.png", cancellationToken);
+            await ExtractResource(assembly, "ErsatzTV.png", cancellationToken);
+            await ExtractResource(assembly, "Roboto-Regular.ttf", cancellationToken);
+        }
+
+        public Task StopAsync(CancellationToken cancellationToken)
+        {
+            return Task.CompletedTask;
+        }
+
+        private async Task ExtractResource(Assembly assembly, string name, CancellationToken cancellationToken)
+        {
+            await using Stream resource = assembly.GetManifestResourceStream($"ErsatzTV.Resources.{name}");
+            if (resource != null)
+            {
+                await using FileStream fs = File.Create(
+                    Path.Combine(FileSystemLayout.ResourcesCacheFolder, name));
+                await resource.CopyToAsync(fs, cancellationToken);
+            }
+        }
+    }
+}

ErsatzTV/Startup.cs

@@ -255,6 +255,7 @@ namespace ErsatzTV
             services.AddHostedService<EndpointValidatorService>();
             services.AddHostedService<DatabaseMigratorService>();
             services.AddHostedService<CacheCleanerService>();
+            services.AddHostedService<ResourceExtractorService>();
             services.AddHostedService<EmbyService>();
             services.AddHostedService<JellyfinService>();
             services.AddHostedService<PlexService>();