[customevent] Enforce channel to be set in event

Signed-off-by: Knut Ahlers <knut@ahlers.me>

internal/apimodules/customevent/customevent.go

@@ -3,7 +3,9 @@ package customevent
 import (
 	"encoding/json"
 	"net/http"
+	"strings"
 
+	"github.com/gorilla/mux"
 	"github.com/pkg/errors"
 
 	"github.com/Luzifer/twitch-bot/plugins"
@@ -20,23 +22,40 @@ func Register(args plugins.RegistrationArguments) error {
 		Method:            http.MethodPost,
 		Module:            "customevent",
 		Name:              "Create custom event",
-		Path:              "/create",
+		Path:              "/{channel}",
 		RequiresWriteAuth: true,
 		ResponseType:      plugins.HTTPRouteResponseTypeNo200,
+		RouteParams: []plugins.HTTPRouteParamDocumentation{
+			{
+				Description: "Channel to create the event in",
+				Name:        "channel",
+			},
+		},
 	})
 
 	return nil
 }
 
 func handleCreateEvent(w http.ResponseWriter, r *http.Request) {
-	payload := make(map[string]any)
+	var (
+		channel = mux.Vars(r)["channel"]
+		payload = make(map[string]any)
+	)
+
+	if channel == "" {
+		http.Error(w, errors.New("missing channel").Error(), http.StatusBadRequest)
+		return
+	}
 
 	if err := json.NewDecoder(r.Body).Decode(&payload); err != nil {
 		http.Error(w, errors.Wrap(err, "parsing event payload").Error(), http.StatusBadRequest)
 		return
 	}
 
-	if err := eventCreatorFunc("custom", plugins.FieldCollectionFromData(payload)); err != nil {
+	fields := plugins.FieldCollectionFromData(payload)
+	fields.Set("channel", "#"+strings.TrimLeft(channel, "#"))
+
+	if err := eventCreatorFunc("custom", fields); err != nil {
 		http.Error(w, errors.Wrap(err, "creating event").Error(), http.StatusInternalServerError)
 		return
 	}