| import { readFile } from "node:fs/promises" |
| import path from "node:path" |
|
|
| export type LocalFiles = Readonly<{ |
| readText(path: string): Promise<string> |
| readBytes(path: string): Promise<Uint8Array> |
| mime(path: string): Promise<string> |
| }> |
|
|
| export type LocalAttachment = |
| | Readonly<{ type: "text"; mime: "image/svg+xml"; content: string }> |
| | Readonly<{ type: "binary"; mime: string; content: Uint8Array }> |
|
|
| export function readLocalAttachment(file: string) { |
| return readLocalAttachmentWith( |
| { |
| readText: (value) => readFile(value, "utf8"), |
| readBytes: (value) => readFile(value), |
| mime: async (value) => mimeTypes[path.extname(value).toLowerCase()] ?? "application/octet-stream", |
| }, |
| file, |
| ) |
| } |
|
|
| const mimeTypes: Record<string, string> = { |
| ".avif": "image/avif", |
| ".gif": "image/gif", |
| ".jpeg": "image/jpeg", |
| ".jpg": "image/jpeg", |
| ".pdf": "application/pdf", |
| ".png": "image/png", |
| ".svg": "image/svg+xml", |
| ".webp": "image/webp", |
| } |
|
|
| export async function readLocalAttachmentWith(files: LocalFiles, path: string): Promise<LocalAttachment | undefined> { |
| const mime = await files.mime(path).catch(() => undefined) |
| if (!mime) return |
| if (mime === "image/svg+xml") { |
| const content = await files.readText(path).catch(() => undefined) |
| if (!content) return |
| return { type: "text", mime, content } |
| } |
| if (!mime.startsWith("image/") && mime !== "application/pdf") return |
| const content = await files.readBytes(path).catch(() => undefined) |
| if (!content) return |
| return { type: "binary", mime, content } |
| } |
|
|
