Begin implementation of formatted barcodes

web/help.route.go

@@ -0,0 +1,32 @@
+package web
+
+import (
+	"html/template"
+	"net/http"
+
+	"git.fjla.uk/fred.boniface/barcodes/validation"
+)
+
+func helpTemplate(w http.ResponseWriter, r *http.Request) {
+	i := 0
+	barcodeOptions := make([]string, len(validation.FormatRules))
+	for k := range validation.FormatRules {
+		barcodeOptions[i] = k
+		i++
+	}
+
+	type dataType struct {
+		BarcodeOptions []string
+	}
+	data := dataType{
+		BarcodeOptions: barcodeOptions,
+	}
+
+	tmpl := template.Must(template.New("help.html").ParseFiles("templates/help.html"))
+
+	err := tmpl.Execute(w, data)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+}