add thumbnail generation

src/lib/files.ts

@@ -18,6 +18,10 @@ function fileApiUrl(libraryId: string, relativePath: string): string {
   return `/api/file?libraryId=${encodeURIComponent(libraryId)}&path=${encodeURIComponent(relativePath)}`
 }
 
+function thumbnailApiUrl(libraryId: string, relativePath: string): string {
+  return `/api/thumbnail?libraryId=${encodeURIComponent(libraryId)}&path=${encodeURIComponent(relativePath)}`
+}
+
 export function scanDirectory(
   libraryRoot: string,
   libraryId: string,
@@ -43,17 +47,20 @@ export function scanDirectory(
           type: 'directory',
           mediaType: null,
           url: null,
+          thumbnailUrl: null,
         }
       }
 
       const relPath = subpath ? path.join(subpath, d.name) : d.name
       const mediaType = getMediaType(d.name)
+      const hasThumbnail = mediaType === 'image' || mediaType === 'video'
 
       return {
         name: d.name,
         type: 'file',
         mediaType,
         url: fileApiUrl(libraryId, relPath),
+        thumbnailUrl: hasThumbnail ? thumbnailApiUrl(libraryId, relPath) : null,
       }
     })