1 files changed, 49 insertions, 6 deletions

diff --git a/Services/MediaService.cs b/Services/MediaService.cs
index a5803f9..2f7eac6 100644
--- a/Services/MediaService.cs
+++ b/Services/MediaService.cs
@@ -1,4 +1,5 @@
 using ImageMagick;
+using ImageMagick.Formats;
 using Microsoft.EntityFrameworkCore;
 using MimeDetective;
 using MimeDetective.Definitions;
@@ -31,14 +32,21 @@ public interface IMediaService {
     public void DeleteThumbnails(Media media);
     public Stream GetThumbnail(Guid media, int? width, int? height);
     public Stream GetThumbnail(Media media, int? width, int? height);
+    public Stream GetConverted(Guid mediaId, string mimeType = "image/png");
+    public Stream GetConverted(Media media, string mimeType = "image/png");
     public string GetPath(Guid media);
-    public string GetPath(Guid media, int? width, int? height);
     public string GetPath(Media media);
-    public string GetPath(Media media, int? width, int? height);
 
 }
 
 public class MediaService : IMediaService {
+    private readonly Dictionary<string,MagickFormat> FormatMap = new() {
+        ["image/jpeg"] = MagickFormat.Jpeg,
+        ["image/jpg"]  = MagickFormat.Jpg,
+        ["image/png"]  = MagickFormat.Png,
+        ["image/webp"] = MagickFormat.WebP
+    };
+
     private IDbContextFactory<HBContext> dbFactory;
     private IConfigService               config;
 
@@ -267,7 +275,7 @@ public class MediaService : IMediaService {
                 "Both width and height cannot be null!",
                 mediaId);
 
-        var thumbPath = GetPath(mediaId, width, height);
+        var thumbPath = GetThumbnailPath(mediaId, width, height);
 
         if(File.Exists(thumbPath))
             return System.IO.File.OpenRead(thumbPath);
@@ -288,9 +296,30 @@ public class MediaService : IMediaService {
         return System.IO.File.OpenRead(thumbPath);
     }
 
+    public Stream GetConverted(Guid mediaId, string mimeType) {
+        if(!FormatMap.TryGetValue(mimeType, out var format))
+            throw new MediaException($"Cannot convert to unknown format ({mimeType})", mediaId);
+
+        var convertedPath = GetConvertedPath(mediaId, mimeType);
+
+        if(File.Exists(convertedPath))
+            return System.IO.File.OpenRead(convertedPath);
+
+        if(!File.Exists(GetPath(mediaId)))
+            throw new ObjectNotFoundException(mediaId);
+
+        using var image = new MagickImage(GetPath(mediaId));
+        image.Write(convertedPath, format);
+
+        return System.IO.File.OpenRead(convertedPath);
+    }
+
     public Stream GetThumbnail(Media media, int? width, int? height) =>
         GetThumbnail(media.Guid, width, height);
 
+    public Stream GetConverted(Media media, string mimeType) =>
+        GetConverted(media.Guid, mimeType);
+
     public string GetPath(Guid mediaId) {
         var fileInfo = new FileInfo(
             Path.Join(
@@ -303,7 +332,7 @@ public class MediaService : IMediaService {
         return fileInfo.FullName;
     }
 
-    public string GetPath(Guid mediaId, int? width, int? height) {
+    public string GetThumbnailPath(Guid mediaId, int? width, int? height) {
         if(width is null && height is null)
             throw new ThumbnailException(
                 "Both width and height cannot be null!",
@@ -319,11 +348,25 @@ public class MediaService : IMediaService {
         return fileInfo.FullName;
     }
 
+    public string GetConvertedPath(Guid mediaId, string mimeType) {
+        var fileInfo = new FileInfo(Path.Join(
+            config.ConvertedMediaBasePath,
+            mediaId.ToString().Substring(0, 2),
+            mediaId.ToString().Substring(2, 2),
+            $"{mediaId.ToString()}-{mimeType.Split('/')[1]}"));
+
+        Directory.CreateDirectory(fileInfo.Directory!.FullName);
+        return fileInfo.FullName;
+    }
+
     public string GetPath(Media media) =>
         GetPath(media.Guid);
 
-    public string GetPath(Media media, int? width, int? height) =>
-        GetPath(media.Guid, width, height);
+    public string GetThumbnailPath(Media media, int? width, int? height) =>
+        GetThumbnailPath(media.Guid, width, height);
+
+    public string GetConvertedPath(Media media, string mimeType) =>
+        GetConvertedPath(media.Guid, mimeType);
 
     private int GetUploadedFileHash(UploadedFile uf) => (
         uf.CreateTime,