Add thumbnail support via ffmpeg API (incomplete

thumbnail/base.ts

@@ -2,10 +2,18 @@ import { join } from "std/path/mod.ts";
 import { filterFilename } from "../utils.ts";
 import type { EhFile } from "../db.ts";
 
+export enum ThumbnailGenMethod {
+    Unknown,
+    Cover,
+    Contain,
+    Fill,
+}
+
 export type ThumbnailConfig = {
     width: number;
     height: number;
     quality: number;
+    method: ThumbnailGenMethod;
 };
 
 export function generate_filename(
@@ -13,10 +21,22 @@ export function generate_filename(
     f: EhFile,
     cfg: ThumbnailConfig,
 ) {
+    let method = "";
+    switch (cfg.method) {
+        case ThumbnailGenMethod.Cover:
+            method = "-cover";
+            break;
+        case ThumbnailGenMethod.Contain:
+            method = "-contain";
+            break;
+        case ThumbnailGenMethod.Fill:
+            method = "-fill";
+            break;
+    }
     return join(
         base,
         filterFilename(
-            `${f.id}-${f.token}-${cfg.width}x${cfg.height}-q${cfg.quality}.jpg`,
+            `${f.id}-${f.token}-${cfg.width}x${cfg.height}-q${cfg.quality}${method}.jpg`,
         ),
     );
 }