Use the same code paths to render the browser version of emails

htmlpage/fileserver.go

@@ -54,7 +54,7 @@ func FileServer(r chi.Router, path string, root http.FileSystem, embeddedFS embe
 			// Try to open from local filesystem for development
 			fileToServe, err = root.Open(requestedPath)
 			if err != nil {
-				respondError(w, "Failed to open file", err, http.StatusNotFound)
+				RespondError(w, "Failed to open file", err, http.StatusNotFound)
 				return
 			}
 		}

htmlpage/html.go

@@ -85,7 +85,7 @@ func RenderOrError(w http.ResponseWriter, template *BuiltTemplate, context inter
 	err := template.executeTemplate(buf, context)
 	if err != nil {
 		log.Error().Err(err).Strs("files", template.files).Msg("Failed to render template")
-		respondError(w, "Failed to render template", err, http.StatusInternalServerError)
+		RespondError(w, "Failed to render template", err, http.StatusInternalServerError)
 		return
 	}
 	buf.WriteTo(w)

htmlpage/response.go

@@ -34,7 +34,7 @@ func (crw *customResponseWriter) Write(b []byte) (int, error) {
 }
 
 // Respond with an error that is visible to the user
-func respondError(w http.ResponseWriter, m string, e error, s int) {
+func RespondError(w http.ResponseWriter, m string, e error, s int) {
 	log.Warn().Int("status", s).Err(e).Str("user message", m).Msg("Responding with an error")
 	http.Error(w, m, s)
 }