counter: fix decrement-by

plugins/counter/api.go

@@ -5,7 +5,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"github.com/velour/catbase/bot/user"
-	"io/ioutil"
+	"io"
 	"net/http"
 	"net/url"
 	"strconv"
@@ -45,6 +45,8 @@ func (p *CounterPlugin) mkIncrementByNAPI(direction int) func(w http.ResponseWri
 		delta, err := strconv.Atoi(chi.URLParam(r, "delta"))
 		if err != nil || delta == 0 {
 			delta = direction
+		} else {
+			delta = delta * direction
 		}
 
 		secret, pass, ok := r.BasicAuth()
@@ -81,7 +83,7 @@ func (p *CounterPlugin) mkIncrementByNAPI(direction int) func(w http.ResponseWri
 			return
 		}
 
-		body, _ := ioutil.ReadAll(r.Body)
+		body, _ := io.ReadAll(r.Body)
 		postData := map[string]string{}
 		err = json.Unmarshal(body, &postData)
 		personalMsg := ""
@@ -110,10 +112,16 @@ func (p *CounterPlugin) mkIncrementByNAPI(direction int) func(w http.ResponseWri
 		}
 		msg := fmt.Sprintf("%s changed their %s counter by %d for a total of %d via the amazing %s API. %s",
 			userName, itemName, delta, item.Count+delta*direction, p.cfg.Get("nick", "catbase"), personalMsg)
+		if !ok {
+			chs := p.cfg.GetArray("counter.channels", []string{})
 			for _, ch := range chs {
 				p.b.Send(p.b.DefaultConnector(), bot.Message, ch, msg)
 				req.Msg.Channel = ch
 			}
+		} else {
+			p.b.Send(p.b.DefaultConnector(), bot.Message, ch, msg)
+			req.Msg.Channel = ch
+		}
 		item.UpdateDelta(req, delta*direction)
 		j, _ := json.Marshal(struct{ Status bool }{true})
 		fmt.Fprint(w, string(j))