chunking messages that overflow

message.go

@@ -6,6 +6,11 @@ import (
 	dg "github.com/bwmarrin/discordgo"
 )
 
+const (
+	// the max discord allows for basic messages
+	MSG_MAX_LENGTH = 2000
+)
+
 // the message struct is passed to the command payload providing basic
 // message information and needed methods
 type Message struct {
@@ -27,8 +32,36 @@ func (m *Message) React(emoji Reaction) error {
 	return m.sesh.MessageReactionAdd(m.channelID, m.msgID, fmt.Sprint(emoji))
 }
 
-// sends response to message
+// sends response to message, if the response length is greater than 2000 characters the
+// messages are split and sent seperatly
 func (m *Message) Respond(res string) error {
+	if len(res) > MSG_MAX_LENGTH {
+		for len(res) > 0 {
+			//send full chunk size allowed by discord
+			sc := res[:MSG_MAX_LENGTH]
+			rep := m.sesh.createReply(sc, m.msgID, m.channelID, m.serverID)
+			_, err := m.sesh.ChannelMessageSendComplex(m.channelID, rep)
+			if err != nil {
+				return err
+			}
+			res = res[MSG_MAX_LENGTH:]
+
+			//if we have left than a full chunk send the rest and break the loop
+			if len(res) < MSG_MAX_LENGTH {
+				final := m.sesh.createReply(res, m.msgID, m.channelID, m.serverID)
+				_, err := m.sesh.ChannelMessageSendComplex(m.channelID, final)
+				if err != nil {
+					return err
+				}
+
+				break
+			}
+		}
+
+		return nil
+	}
+
+	//short enough message to send in one message
 	rep := m.sesh.createReply(res, m.msgID, m.channelID, m.serverID)
 	_, err := m.sesh.ChannelMessageSendComplex(m.channelID, rep)
 	return err