add templating engine

render.go

@@ -0,0 +1,24 @@
+package goblocks
+
+import (
+	"encoding/json"
+	"log/slog"
+	"net/http"
+)
+
+func (a *App) JSON(w http.ResponseWriter, code int, v any) {
+	w.Header().Set("Content-Type", "application/json")
+	w.WriteHeader(code)
+	json.NewEncoder(w).Encode(v)
+}
+
+func (a *App) HTML(w http.ResponseWriter, code int, name string, td *TemplateData) {
+	w.Header().Set("Content-Type", "text/html; charset=utf-8")
+	err := a.Templates.Template(w, name, td)
+	if err != nil {
+		slog.Error("error rendering template", "error", err)
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+	w.WriteHeader(code)
+}