Creating a formatCurrency function

cmd/web/render.go

@@ -22,7 +22,14 @@ type templateData struct {
 	IsAuthenticated int
 }
 
-var functions = template.FuncMap{}
+var functions = template.FuncMap{
+	"formatCurrency": formatCurrency,
+}
+
+func formatCurrency(n int) string {
+	f := float32(n / 100)
+	return fmt.Sprintf("€%.2f", f)
+}
 
 //go:embed templates
 var templateFS embed.FS

cmd/web/templates/buy-once.page.gohtml

@@ -19,8 +19,8 @@ Buy one widget
       autocomplete="off"
       novalidate="">
     <input type="hidden" name="product_id" value="{{$widget.ID}}">
-    <input type="hidden" name="amount" value="{{$widget.Price}}">
-    <h3 class="mt-2 mb-3 text-center">{{$widget.Name}}: {{$widget.Price}}</h3>
+    <input type="hidden" id="amount" name="amount" value="{{$widget.Price}}">
+    <h3 class="mt-2 mb-3 text-center">{{$widget.Name}}: {{formatCurrency $widget.Price}}</h3>
     <p class="mt-2 mb-3 text-center">{{$widget.Description}}</p>
     <hr>