feat: implement "groupAcceptInviteV4" add participant msg

src/Socket/groups.ts

@@ -1,12 +1,12 @@
 import { proto } from '../../WAProto'
-import { GroupMetadata, ParticipantAction, SocketConfig } from '../Types'
+import { GroupMetadata, ParticipantAction, SocketConfig, WAMessageKey, WAMessageStubType } from '../Types'
-import { generateMessageID } from '../Utils'
+import { generateMessageID, unixTimestampSeconds } from '../Utils'
 import { BinaryNode, getBinaryNodeChild, getBinaryNodeChildren, jidEncode, jidNormalizedUser } from '../WABinary'
 import { makeSocket } from './socket'
 
 export const makeGroupsSocket = (config: SocketConfig) => {
 	const sock = makeSocket(config)
-	const { query } = sock
+	const { authState, ev, query } = sock
 
 	const groupQuery = async(jid: string, type: 'get' | 'set', content: BinaryNode[]) => (
 		query({
@@ -139,18 +139,59 @@ export const makeGroupsSocket = (config: SocketConfig) => {
 		},
 		/**
 		 * accept a GroupInviteMessage
-		 * @param senderJid jid of the person that sent the message
+		 * @param key the key of the invite message, or optionally only provide the jid of the person who sent the invite
 		 * @param inviteMessage the message to accept
 		 */
-		groupAcceptInviteV4: async(senderJid: string, inviteMessage: proto.IGroupInviteMessage) => {
+		groupAcceptInviteV4: async(key: string | WAMessageKey, inviteMessage: proto.IGroupInviteMessage) => {
+			key = typeof key === 'string' ? { remoteJid: key } : key
 			const results = await groupQuery(inviteMessage.groupJid, 'set', [{
 				tag: 'accept',
 				attrs: {
 					code: inviteMessage.inviteCode,
 					expiration: inviteMessage.inviteExpiration.toString(),
-					admin: senderJid
+					admin: key.remoteJid!
 				}
 			}])
+			// if we have the full message key
+			// update the invite message to be expired
+			if(key.id) {
+				// create new invite message that is expired
+				inviteMessage = proto.GroupInviteMessage.fromObject(inviteMessage)
+				inviteMessage.inviteExpiration = 0
+				inviteMessage.inviteCode = ''
+				ev.emit('messages.update', [
+					{
+						key,
+						update: {
+							message: {
+								groupInviteMessage: inviteMessage
+							}
+						}
+					}
+				])
+			}
+
+			// generate the group add message
+			ev.emit('messages.upsert', {
+				messages: [
+					{
+						key: {
+							remoteJid: inviteMessage.groupJid,
+							id: generateMessageID(),
+							fromMe: false,
+							participant: key.remoteJid,
+						},
+						messageStubType: WAMessageStubType.GROUP_PARTICIPANT_ADD,
+						messageStubParameters: [
+							authState.creds.me!.id
+						],
+						participant: key.remoteJid,
+						messageTimestamp: unixTimestampSeconds()
+					}
+				],
+				type: 'notify'
+			})
+
 			return results.attrs.from
 		},
 		groupGetInviteInfo: async(code: string) => {