Can invite a user to join a group

src/helpers/GroupsHelper.ts

@@ -158,6 +158,23 @@ export class GroupsHelper {
 		return result.visibility;
 	}
 
+	/**
+	 * Invite a user to join a group
+	 * 
+	 * @param groupID The ID of the target group
+	 * @param userID The ID of the target user
+	 */
+	public static async SendInvitation(groupID: number, userID: number) {
+		await this.InsertMember(new GroupMember({
+			id: -1,
+			userID: userID,
+			groupID: groupID,
+			timeCreate: time(),
+			following: true,
+			level: GroupMembershipLevels.INVITED
+		}));
+	}
+
 	/**
 	 * Insert a new group member
 	 *