minor fixes, tagged command errors

util.go

@@ -3,12 +3,20 @@ package matrixbotlib
 import (
 	"errors"
 	"fmt"
+	"log"
 	"strings"
 
 	"maunium.net/go/mautrix"
 	"maunium.net/go/mautrix/event"
 )
 
+var (
+	//ErrCmdParseNoPrefix means no prefix was found
+	ErrCmdParseNoPrefix = errors.New("no prefix found")
+	//ErrCmdParseNoCmd means no actual commands were found
+	ErrCmdParseNoCmd = errors.New("nothing to parse from command")
+)
+
 //ParseCommand takes a Event and pulls a command + args if available
 func ParseCommand(evt *event.Event, prefix string) ([]string, error) {
 	body := evt.Content.AsMessage().Body
@@ -30,9 +38,9 @@ func AcceptAllRoomInvites(client *mautrix.Client) {
 		if evt.Content.AsMember().Membership.IsInviteOrJoin() {
 			_, err := client.JoinRoomByID(evt.RoomID)
 			if err != nil {
-				fmt.Printf("error joining room %v", evt.RoomID)
+				log.Printf("error joining room %v\n", evt.RoomID)
 			} else {
-				fmt.Printf("joined room %v", evt.RoomID)
+				log.Printf("joined room %v\n", evt.RoomID)
 			}
 		}
 	})