go: Improve performance by using discordgo caching

GoBot/discord/backend/members.go

@@ -12,24 +12,12 @@ import (
 var ErrMemberNotFound = errors.New("discord/backend: the requested member was not found")
 
 func GetAllMembers(s *discordgo.Session) ([]*discordgo.Member, error) {
-	initial, err := s.GuildMembers(config.GuildID, "", 1000)
-	if err != nil {
-		return nil, err
-	}
-	next := initial[len(initial)-1].User.ID
-	for next != "" {
-		nextArray, err := s.GuildMembers(config.GuildID, next, 1000)
-		if err != nil {
-			return nil, err
-		}
-		if len(nextArray) == 0 {
-			next = ""
-		} else {
-			next = nextArray[len(nextArray)-1].User.ID
-			initial = append(initial, nextArray...)
+	for _, guild := range s.State.Guilds {
+		if guild.ID == config.GuildID {
+			return guild.Members, nil
 		}
 	}
-	return initial, nil
+	return nil, ErrMemberNotFound
 }
 
 func GetMemberFromUserFriendlyName(s *discordgo.Session, user string) (*discordgo.Member, error) {

GoBot/discord/discord.go

@@ -19,6 +19,7 @@ func StartBot(token string, kill chan bool) {
 	dg.AddHandler(ProcessCommand)
 	dg.AddHandler(modules.CheckForReact)
 	dg.AddHandler(modules.CheckForVote)
+	dg.StateEnabled = true
 
 	if err := dg.Open(); err != nil {
 		panic(err)