support multiple attachments

src/models/rest.ts

@@ -1,4 +1,6 @@
 import * as baseEndpoints from '../consts/urlsAndVersions.ts'
+import { Embed } from '../structures/embed.ts'
+import { MessageAttachment } from '../structures/message.ts'
 import { Collection } from '../utils/collection.ts'
 import { Client } from './client.ts'
 
@@ -283,11 +285,46 @@ export class RESTManager {
       headers['X-Audit-Log-Reason'] = encodeURIComponent(body.reason)
     }
 
-    if (body?.file !== undefined) {
+    let _files: undefined | MessageAttachment[]
+    if (body?.embed?.files !== undefined && Array.isArray(body?.embed?.files)) {
+      _files = body?.embed?.files
+    }
+    if (body?.embeds !== undefined && Array.isArray(body?.embeds)) {
+      const files1 = body?.embeds
+        .map((e: Embed) => e.files)
+        .filter((e: MessageAttachment[]) => e !== undefined)
+      for (const files of files1) {
+        for (const file of files) {
+          if (_files === undefined) _files = []
+          _files?.push(file)
+        }
+      }
+    }
+
+    if (
+      body?.file !== undefined ||
+      body?.files !== undefined ||
+      _files !== undefined
+    ) {
+      const files: Array<{ blob: Blob; name: string }> = []
+      if (body?.file !== undefined) files.push(body.file)
+      if (body?.files !== undefined && Array.isArray(body.files)) {
+        for (const file of body.files) {
+          files.push(file)
+        }
+      }
+      if (_files !== undefined) {
+        for (const file of _files) {
+          files.push(file)
+        }
+      }
       const form = new FormData()
-      form.append('file', body.file.blob, body.file.name)
+      for (const file of files) {
+        form.append(file.name, file.blob, file.name)
+      }
       const json = JSON.stringify(body)
       form.append('payload_json', json)
+      if (body === undefined) body = {}
       body.file = form
     } else if (
       body !== undefined &&

src/structures/embed.ts

@@ -10,6 +10,7 @@ import {
   EmbedVideo
 } from '../types/channel.ts'
 import { Colors, ColorUtil } from '../utils/colorutil.ts'
+import { MessageAttachment } from './message.ts'
 
 /** Message Embed Object */
 export class Embed {
@@ -26,6 +27,7 @@ export class Embed {
   provider?: EmbedProvider
   author?: EmbedAuthor
   fields?: EmbedField[]
+  files: MessageAttachment[] = []
 
   constructor(data?: EmbedPayload) {
     this.title = data?.title
@@ -74,6 +76,13 @@ export class Embed {
     return this
   }
 
+  attach(...files: MessageAttachment[]): Embed {
+    for (const file of files) {
+      this.files.push(file)
+    }
+    return this
+  }
+
   /** Set Embed Type */
   setType(type: EmbedTypes): Embed {
     this.type = type

src/structures/textChannel.ts

@@ -79,6 +79,7 @@ export class TextChannel extends Channel {
       content: content,
       embed: option?.embed,
       file: option?.file,
+      files: option?.files,
       tts: option?.tts,
       allowed_mentions: option?.allowedMentions
     }

src/test/index.ts

@@ -151,6 +151,22 @@ client.on('messageCreate', async (msg: Message) => {
         'https://cdn.discordapp.com/emojis/626139395623354403.png?v=1'
       )
     })
+  } else if (msg.content === '!emattach') {
+    msg.channel.send(
+      new Embed()
+        .attach(
+          await MessageAttachment.load(
+            'https://cdn.discordapp.com/emojis/626139395623354403.png?v=1',
+            'file1.png'
+          ),
+          await MessageAttachment.load(
+            'https://cdn.discordapp.com/emojis/626139395623354403.png?v=1',
+            'file2.png'
+          )
+        )
+        .setImage('attachment://file1.png')
+        .setThumbnail('attachment://file2.png')
+    )
   } else if (msg.content === '!textfile') {
     msg.channel.send({
       file: new MessageAttachment('hello.txt', 'hello world')

src/types/channel.ts

@@ -159,7 +159,8 @@ export interface MessagePayload {
 export interface MessageOptions {
   tts?: boolean
   embed?: Embed
-  file?: MessageAttachment | string
+  file?: MessageAttachment
+  files?: MessageAttachment[]
   allowedMentions?: {
     parse?: 'everyone' | 'users' | 'roles'
     roles?: string[]