feat: WebSocket based implementation of server sent events for cache busting (#527)

* rough implementation of WS based event system for server side notifications of mutation

* fix test construction

* fix deadlock on event bus

* disable linter error

* add item mutation events

* remove old event bus code

* refactor event system to use composables

* refresh items table when new item is added

* fix create form errors

* cleanup unnecessary calls

* fix importer erorrs + limit fn calls on import

Former-commit-id: 2cbcc8bb1d

backend/internal/web/mid/logger.go

@@ -1,6 +1,9 @@
 package mid
 
 import (
+	"bufio"
+	"errors"
+	"net"
 	"net/http"
 
 	"github.com/go-chi/chi/v5/middleware"
@@ -17,6 +20,14 @@ func (s *spy) WriteHeader(status int) {
 	s.ResponseWriter.WriteHeader(status)
 }
 
+func (s *spy) Hijack() (net.Conn, *bufio.ReadWriter, error) {
+	hj, ok := s.ResponseWriter.(http.Hijacker)
+	if !ok {
+		return nil, nil, errors.New("response writer does not support hijacking")
+	}
+	return hj.Hijack()
+}
+
 func Logger(l zerolog.Logger) func(http.Handler) http.Handler {
 	return func(h http.Handler) http.Handler {
 		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {