initial

worker/attachments.ts

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+import { Attachment, PartialMessageMime } from './types';
+import { writeFileSync } from 'fs';
+import { type ParsedMail } from 'mailparser';
+
+export const parseAttachments = async (article: ParsedMail, partial: PartialMessageMime['params'] | null) => {
+  let attachments: Attachment[] = [];
+  if (!article.attachments) {
+    return attachments;
+  }
+
+  article.attachments.map((attachment) => {
+    if (partial) {
+      const fileName = `${partial.id}-part_${partial.number}-attachment`;
+      const filePath = `./partials/${fileName}`
+      writeFileSync(filePath, attachment.content);
+    }
+
+    attachments.push({
+      file: partial ? undefined : new File([attachment.content], attachment.filename ?? crypto.randomUUID(), { type: attachment.contentType }),
+      fileName: attachment.filename ?? '',
+      size: attachment.size,
+      checksum: attachment.checksum,
+      contentType: attachment.contentType,
+    })
+  });
+
+  return attachments;
+}