feat: Returns an object with information about the invite code's group (#1562)

* feat: Returns an object with information about the invite code's group

* refactor: more information in metadata group

README.md

@@ -777,6 +777,11 @@ Of course, replace ``` xyz ``` with an actual ID.
     console.log("joined to: " + response)
     ```
     Of course, replace ``` xxx ``` with invitation code.
+- To get info group by invite code
+    ```ts
+    const response = await sock.groupGetInviteInfo("xxx")
+    console.log("group information: " + response)
+    ```
 
 
 - To join the group using groupInviteMessage

src/Socket/groups.ts

@@ -153,6 +153,10 @@ export const makeGroupsSocket = (config: SocketConfig) => {
 			}])
 			return results.attrs.from
 		},
+		groupGetInviteInfo: async(code: string) => {
+			const results = await groupQuery('@g.us', 'get', [{ tag: 'invite', attrs: { code } }])
+			return extractGroupMetadata(results)
+		},
 		groupToggleEphemeral: async(jid: string, ephemeralExpiration: number) => {
 			const content: BinaryNode = ephemeralExpiration ?
 				{ tag: 'ephemeral', attrs: { expiration: ephemeralExpiration.toString() } } :
@@ -216,6 +220,9 @@ export const extractGroupMetadata = (result: BinaryNode) => {
 	const metadata: GroupMetadata = {
 		id: groupId,
 		subject: group.attrs.subject,
+		subjectOwner: group.attrs.s_o,
+		subjectTime: +group.attrs.s_t,
+		size: +group.attrs.size,
 		creation: +group.attrs.creation,
 		owner: group.attrs.creator ? jidNormalizedUser(group.attrs.creator) : undefined,
 		desc,

src/Types/GroupMetadata.ts

@@ -8,6 +8,10 @@ export interface GroupMetadata {
     id: string
     owner: string | undefined
     subject: string
+    /** group subject owner */
+    subjectOwner?: string
+    /** group subject modification date */
+    subjectTime?: number
     creation: number
     desc?: string
     descOwner?: string
@@ -16,6 +20,8 @@ export interface GroupMetadata {
     restrict?: boolean
     /** is set when the group only allows admins to write messages */
     announce?: boolean
+    /** number of group participants */
+    size?: number
     // Baileys modified array
     participants: GroupParticipant[]
     ephemeralDuration?: number