needed save users that can view channel instead of checking

packages/httpRequest/get.go

@@ -3,6 +3,7 @@ package httpRequest
 import (
 	"context"
 	"errors"
+	"log/slog"
 	"net/http"
 
 	"go-socket/packages/convertions"
@@ -57,13 +58,11 @@ func getHubByIdStr(ctx context.Context, hubId string) (*types.Hub, error) {
 	}
 
 	hub, ok := cache.GetHubById(hubUuid)
+
 	if !ok {
-		hub = types.CreateHub()
-		hub.Id = hubUuid
-		if err := postgresql.GetWholeHub(ctx, hub); err != nil {
-			return nil, err
-		}
+		return nil, errors.New("hub not found")
 	}
+
 	return hub, nil
 }
 
@@ -91,3 +90,39 @@ func getHubUserIfValidWithResponseOnFail(ctx context.Context, response http.Resp
 
 	return user, hubUser, hub, nil
 }
+
+func getHubChannelIfValidWithResponseOnFail(ctx context.Context, response http.ResponseWriter, hub *types.Hub, hubUser *types.HubUser, channelId string) (
+	*types.HubChannel, error) {
+	channelUuid, err := convertions.StringToUuid(channelId)
+	if err != nil {
+		http.Error(response, "invalid channelid", http.StatusBadRequest)
+		return nil, errors.New("invalid channelid")
+	}
+	channel, ok := hub.Channels[channelUuid]
+	if !ok {
+		http.Error(response, "invalid channelid", http.StatusUnauthorized)
+		return nil, errors.New("invalid channelid")
+	}
+
+	group := hub.Groups[channel.ParentId]
+	if group == nil {
+		slog.Warn("hub channel has no parent group", "Hub", hub.Id, "Channel", channel.Id)
+		http.Error(response, "internal server error", http.StatusInternalServerError)
+		return nil, errors.New("internal server error")
+	}
+
+	if !group.RolesCanView.HasSameId(hubUser.Roles) {
+		http.Error(response, "invalid channelid", http.StatusUnauthorized)
+		return nil, errors.New("invalid channelid")
+	}
+
+	if !channel.RolesCanView.HasSameId(hubUser.Roles) {
+		http.Error(response, "invalid channelid", http.StatusUnauthorized)
+		return nil, errors.New("invalid channelid")
+	}
+
+	return channel, nil
+}
+
+// TODO cache on roles or channels needed for quick lookup
+func getHubChannelReadHistorayAndViewChannel(hub *types.Hub, channel *types.HubChannel) []*types.HubUser