media: refactor upload code into a separate module

src/controllers/api/media.ts

@@ -1,19 +1,13 @@
 import { AppController } from '@/app.ts';
-import { Conf } from '@/config.ts';
-import { insertUnattachedMedia } from '@/db/unattached-media.ts';
 import { z } from '@/deps.ts';
 import { fileSchema } from '@/schema.ts';
-import { configUploader as uploader } from '@/uploaders/config.ts';
 import { parseBody } from '@/utils/web.ts';
 import { renderAttachment } from '@/views/attachment.ts';
-
-const uploadSchema = fileSchema
-  .refine((file) => !!file.type, 'File type is required.')
-  .refine((file) => file.size <= Conf.maxUploadSize, 'File size is too large.');
+import { uploadFile } from '@/upload.ts';
 
 const mediaBodySchema = z.object({
-  file: uploadSchema,
-  thumbnail: uploadSchema.optional(),
+  file: fileSchema,
+  thumbnail: fileSchema.optional(),
   description: z.string().optional(),
   focus: z.string().optional(),
 });
@@ -27,21 +21,7 @@ const mediaController: AppController = async (c) => {
 
   try {
     const { file, description } = result.data;
-    const { cid } = await uploader.upload(file);
-
-    const url = new URL(`/ipfs/${cid}`, Conf.mediaDomain).toString();
-
-    const media = await insertUnattachedMedia({
-      pubkey: c.get('pubkey')!,
-      url,
-      data: {
-        name: file.name,
-        mime: file.type,
-        size: file.size,
-        description,
-      },
-    });
-
+    const media = await uploadFile(file, { pubkey: c.get('pubkey')!, description });
     return c.json(renderAttachment(media));
   } catch (e) {
     console.error(e);

src/upload.ts

@@ -0,0 +1,34 @@
+import { Conf } from '@/config.ts';
+import { insertUnattachedMedia } from '@/db/unattached-media.ts';
+import { configUploader as uploader } from '@/uploaders/config.ts';
+
+interface FileMeta {
+  pubkey: string;
+  description?: string;
+}
+
+/** Upload a file, track it in the database, and return the resulting media object. */
+async function uploadFile(file: File, meta: FileMeta) {
+  const { name, type, size } = file;
+  const { pubkey, description } = meta;
+
+  if (file.size > Conf.maxUploadSize) {
+    throw new Error('File size is too large.');
+  }
+
+  const { cid } = await uploader.upload(file);
+  const url = new URL(`/ipfs/${cid}`, Conf.mediaDomain).toString();
+
+  return insertUnattachedMedia({
+    pubkey,
+    url,
+    data: {
+      name,
+      size,
+      description,
+      mime: type,
+    },
+  });
+}
+
+export { uploadFile };