fix(bun): correctly handle BunFiles

packages/bun/src/client.ts

@@ -9,9 +9,9 @@ import {
 } from '@mtcute/core/client.js'
 import { setPlatform } from '@mtcute/core/platform.js'
 
-import { NodePlatform } from './common-internals-node/platform.js'
 import { downloadToFile } from './methods/download-file.js'
 import { downloadAsNodeStream } from './methods/download-node-stream.js'
+import { BunPlatform } from './platform.js'
 import { SqliteStorage } from './sqlite/index.js'
 import { BunCryptoProvider } from './utils/crypto.js'
 import { TcpTransport } from './utils/tcp.js'
@@ -41,7 +41,7 @@ export interface BaseTelegramClientOptions
 
 export class BaseTelegramClient extends BaseTelegramClientBase {
     constructor(opts: BaseTelegramClientOptions) {
-        if (!opts.platformless) setPlatform(new NodePlatform())
+        if (!opts.platformless) setPlatform(new BunPlatform())
 
         super({
             crypto: new BunCryptoProvider(),

packages/bun/src/index.ts

@@ -1,5 +1,5 @@
 export * from './client.js'
-export * from './common-internals-node/platform.js'
+export * from './platform.js'
 export * from './sqlite/index.js'
 export * from './utils/crypto.js'
 export * from './utils/tcp.js'

packages/bun/src/platform.ts

@@ -0,0 +1,8 @@
+import { NodePlatform } from './common-internals-node/platform.js'
+import { normalizeFile } from './utils/normalize-file.js'
+
+export class BunPlatform extends NodePlatform {
+    declare normalizeFile: typeof normalizeFile
+}
+
+BunPlatform.prototype.normalizeFile = normalizeFile

packages/bun/src/utils/normalize-file.ts

@@ -1,3 +1,4 @@
+import { BunFile } from 'bun'
 import { ReadStream } from 'fs'
 import { stat } from 'fs/promises'
 import { basename } from 'path'
@@ -5,11 +6,24 @@ import { Readable as NodeReadable } from 'stream'
 
 import { UploadFileLike } from '@mtcute/core'
 
+// https://github.com/oven-sh/bun/issues/10481
+function isBunFile(file: unknown): file is BunFile {
+    return file instanceof Blob && 'name' in file && file.name.length > 0
+}
+
 export async function normalizeFile(file: UploadFileLike) {
     if (typeof file === 'string') {
         file = Bun.file(file)
     }
 
+    if (isBunFile(file)) {
+        return {
+            file: file,
+            fileName: file.name,
+            fileSize: file.size,
+        }
+    }
+
     // while these are not Bun-specific, they still may happen
     if (file instanceof ReadStream) {
         const fileName = basename(file.path.toString())
@@ -28,6 +42,6 @@ export async function normalizeFile(file: UploadFileLike) {
         }
     }
 
-    // string -> ReadStream, thus already handled
+    // string -> BunFile, thus already handled
     return null
 }