From fe4e737082ff20c33c92ec813e8dda558be941c9 Mon Sep 17 00:00:00 2001
From: Lauren Liberda <laura@selfisekai.rocks>
Date: Sun, 23 May 2021 14:08:24 +0200
Subject: [PATCH] scale thumbnail support (#1)

---
 src/index.ts | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/src/index.ts b/src/index.ts
index 54f577d..2ba4f82 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -116,7 +116,15 @@ media.get(
 
 media.get('/thumbnail/:serverName/:mediaId', async (ctx) => {
   const { serverName, mediaId } = ctx.params;
-  if (typeof ctx.query.width !== 'string' || typeof ctx.query.height !== 'string') return;
+  if (
+    typeof ctx.query.width !== 'string' ||
+    typeof ctx.query.height !== 'string' ||
+    typeof ctx.query.method !== 'string'
+  ) {
+    return;
+  }
+  const { method } = ctx.query;
+  assert(['crop', 'scale'].includes(method));
   const width = parseInt(ctx.query.width, 10);
   const height = parseInt(ctx.query.height, 10);
 
@@ -144,7 +152,10 @@ media.get('/thumbnail/:serverName/:mediaId', async (ctx) => {
     );
   }
   if (file && file.statusCode === 200) {
-    const img = await sharp(file.body).resize(width, height).toBuffer({ resolveWithObject: true });
+    const resizer = sharp(file.body).resize(width, height, {
+      fit: method === 'crop' ? 'cover' : 'inside',
+    });
+    const img = await resizer.toBuffer({ resolveWithObject: true });
     ctx.res.statusCode = 200;
     ctx.res.setHeader('content-type', `image/${img.info.format}`);
     ctx.res.write(img.data);