feat(services): EAN 13 generation

handlers/contract.go

@@ -41,13 +41,20 @@ func GenerateContract(c *fiber.Ctx) error {
 	contract.Runners = duplicatedRunners
 
 	generator := services.DefaultTemplater{}
-	template, err := templates.GetTemplate(contract.Locale, "contract")
+	templateString, err := templates.GetTemplate(contract.Locale, "contract")
 	if err != nil {
 		log.Println(err)
 		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{
 			"error": "Template not found",
 		})
 	}
+	template, err := generator.StringToTemplate(templateString)
+	if err != nil {
+		return c.Status(fiber.StatusInternalServerError).JSON(fiber.Map{
+			"error": err.Error(),
+		})
+	}
+
 	result, err := generator.Execute(template, &services.ContractTemplateOptions{
 		Runners:              contract.Runners,
 		CurrencySymbol:       "€",